radeonsi: don't interpolate colors if flatshading is enabled

[mesa.git] / src / gallium / drivers / radeonsi / si_shader.c

/*
 * Copyright 2012 Advanced Micro Devices, Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * on the rights to use, copy, modify, merge, publish, distribute, sub
 * license, and/or sell copies of the Software, and to permit persons to whom
 * the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors:
 *      Tom Stellard <thomas.stellard@amd.com>
 *      Michel Dänzer <michel.daenzer@amd.com>
 *      Christian König <christian.koenig@amd.com>
 */

#include "gallivm/lp_bld_const.h"
#include "gallivm/lp_bld_gather.h"
#include "gallivm/lp_bld_intr.h"
#include "gallivm/lp_bld_logic.h"
#include "gallivm/lp_bld_arit.h"
#include "gallivm/lp_bld_bitarit.h"
#include "gallivm/lp_bld_flow.h"
#include "radeon/r600_cs.h"
#include "radeon/radeon_llvm.h"
#include "radeon/radeon_elf_util.h"
#include "radeon/radeon_llvm_emit.h"
#include "util/u_memory.h"
#include "util/u_pstipple.h"
#include "util/u_string.h"
#include "tgsi/tgsi_parse.h"
#include "tgsi/tgsi_build.h"
#include "tgsi/tgsi_util.h"
#include "tgsi/tgsi_dump.h"

#include "si_pipe.h"
#include "si_shader.h"
#include "sid.h"

#include <errno.h>

static const char *scratch_rsrc_dword0_symbol =
        "SCRATCH_RSRC_DWORD0";

static const char *scratch_rsrc_dword1_symbol =
        "SCRATCH_RSRC_DWORD1";

struct si_shader_output_values
{
        LLVMValueRef values[4];
        unsigned name;
        unsigned sid;
};

struct si_shader_context
{
        struct radeon_llvm_context radeon_bld;
        struct si_shader *shader;
        struct si_screen *screen;

        unsigned type; /* PIPE_SHADER_* specifies the type of shader. */
        bool is_gs_copy_shader;

        /* Whether to generate the optimized shader variant compiled as a whole
         * (without a prolog and epilog)
         */
        bool is_monolithic;

        int param_streamout_config;
        int param_streamout_write_index;
        int param_streamout_offset[4];
        int param_vertex_id;
        int param_rel_auto_id;
        int param_vs_prim_id;
        int param_instance_id;
        int param_vertex_index0;
        int param_tes_u;
        int param_tes_v;
        int param_tes_rel_patch_id;
        int param_tes_patch_id;
        int param_es2gs_offset;
        int param_oc_lds;

        /* Sets a bit if the dynamic HS control word was 0x80000000. The bit is
         * 0x800000 for VS, 0x1 for ES.
         */
        int param_tess_offchip;

        LLVMTargetMachineRef tm;

        unsigned uniform_md_kind;
        LLVMValueRef const_md;
        LLVMValueRef empty_md;
        LLVMValueRef const_buffers[SI_NUM_CONST_BUFFERS];
        LLVMValueRef lds;
        LLVMValueRef *constants[SI_NUM_CONST_BUFFERS];
        LLVMValueRef shader_buffers[SI_NUM_SHADER_BUFFERS];
        LLVMValueRef sampler_views[SI_NUM_SAMPLERS];
        LLVMValueRef sampler_states[SI_NUM_SAMPLERS];
        LLVMValueRef fmasks[SI_NUM_SAMPLERS];
        LLVMValueRef images[SI_NUM_IMAGES];
        LLVMValueRef so_buffers[4];
        LLVMValueRef esgs_ring;
        LLVMValueRef gsvs_ring[4];
        LLVMValueRef gs_next_vertex[4];
        LLVMValueRef return_value;

        LLVMTypeRef voidt;
        LLVMTypeRef i1;
        LLVMTypeRef i8;
        LLVMTypeRef i32;
        LLVMTypeRef i64;
        LLVMTypeRef i128;
        LLVMTypeRef f32;
        LLVMTypeRef v16i8;
        LLVMTypeRef v2i32;
        LLVMTypeRef v4i32;
        LLVMTypeRef v4f32;
        LLVMTypeRef v8i32;

        LLVMValueRef shared_memory;
};

static struct si_shader_context *si_shader_context(
        struct lp_build_tgsi_context *bld_base)
{
        return (struct si_shader_context *)bld_base;
}

static void si_init_shader_ctx(struct si_shader_context *ctx,
                               struct si_screen *sscreen,
                               struct si_shader *shader,
                               LLVMTargetMachineRef tm);

static void si_llvm_emit_barrier(const struct lp_build_tgsi_action *action,
                                 struct lp_build_tgsi_context *bld_base,
                                 struct lp_build_emit_data *emit_data);

/* Ideally pass the sample mask input to the PS epilog as v13, which
 * is its usual location, so that the shader doesn't have to add v_mov.
 */
#define PS_EPILOG_SAMPLEMASK_MIN_LOC 13

/* The VS location of the PrimitiveID input is the same in the epilog,
 * so that the main shader part doesn't have to move it.
 */
#define VS_EPILOG_PRIMID_LOC 2

#define PERSPECTIVE_BASE 0
#define LINEAR_BASE 9

#define SAMPLE_OFFSET 0
#define CENTER_OFFSET 2
#define CENTROID_OFSET 4

#define USE_SGPR_MAX_SUFFIX_LEN 5
#define CONST_ADDR_SPACE 2
#define LOCAL_ADDR_SPACE 3
#define USER_SGPR_ADDR_SPACE 8


#define SENDMSG_GS 2
#define SENDMSG_GS_DONE 3

#define SENDMSG_GS_OP_NOP      (0 << 4)
#define SENDMSG_GS_OP_CUT      (1 << 4)
#define SENDMSG_GS_OP_EMIT     (2 << 4)
#define SENDMSG_GS_OP_EMIT_CUT (3 << 4)

/**
 * Returns a unique index for a semantic name and index. The index must be
 * less than 64, so that a 64-bit bitmask of used inputs or outputs can be
 * calculated.
 */
unsigned si_shader_io_get_unique_index(unsigned semantic_name, unsigned index)
{
        switch (semantic_name) {
        case TGSI_SEMANTIC_POSITION:
                return 0;
        case TGSI_SEMANTIC_PSIZE:
                return 1;
        case TGSI_SEMANTIC_CLIPDIST:
                assert(index <= 1);
                return 2 + index;
        case TGSI_SEMANTIC_GENERIC:
                if (index <= 63-4)
                        return 4 + index;
                else
                        /* same explanation as in the default statement,
                         * the only user hitting this is st/nine.
                         */
                        return 0;

        /* patch indices are completely separate and thus start from 0 */
        case TGSI_SEMANTIC_TESSOUTER:
                return 0;
        case TGSI_SEMANTIC_TESSINNER:
                return 1;
        case TGSI_SEMANTIC_PATCH:
                return 2 + index;

        default:
                /* Don't fail here. The result of this function is only used
                 * for LS, TCS, TES, and GS, where legacy GL semantics can't
                 * occur, but this function is called for all vertex shaders
                 * before it's known whether LS will be compiled or not.
                 */
                return 0;
        }
}

/**
 * Get the value of a shader input parameter and extract a bitfield.
 */
static LLVMValueRef unpack_param(struct si_shader_context *ctx,
                                 unsigned param, unsigned rshift,
                                 unsigned bitwidth)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMValueRef value = LLVMGetParam(ctx->radeon_bld.main_fn,
                                          param);

        if (LLVMGetTypeKind(LLVMTypeOf(value)) == LLVMFloatTypeKind)
                value = bitcast(&ctx->radeon_bld.soa.bld_base,
                                TGSI_TYPE_UNSIGNED, value);

        if (rshift)
                value = LLVMBuildLShr(gallivm->builder, value,
                                      lp_build_const_int32(gallivm, rshift), "");

        if (rshift + bitwidth < 32) {
                unsigned mask = (1 << bitwidth) - 1;
                value = LLVMBuildAnd(gallivm->builder, value,
                                     lp_build_const_int32(gallivm, mask), "");
        }

        return value;
}

static LLVMValueRef get_rel_patch_id(struct si_shader_context *ctx)
{
        switch (ctx->type) {
        case PIPE_SHADER_TESS_CTRL:
                return unpack_param(ctx, SI_PARAM_REL_IDS, 0, 8);

        case PIPE_SHADER_TESS_EVAL:
                return LLVMGetParam(ctx->radeon_bld.main_fn,
                                    ctx->param_tes_rel_patch_id);

        default:
                assert(0);
                return NULL;
        }
}

/* Tessellation shaders pass outputs to the next shader using LDS.
 *
 * LS outputs = TCS inputs
 * TCS outputs = TES inputs
 *
 * The LDS layout is:
 * - TCS inputs for patch 0
 * - TCS inputs for patch 1
 * - TCS inputs for patch 2             = get_tcs_in_current_patch_offset (if RelPatchID==2)
 * - ...
 * - TCS outputs for patch 0            = get_tcs_out_patch0_offset
 * - Per-patch TCS outputs for patch 0  = get_tcs_out_patch0_patch_data_offset
 * - TCS outputs for patch 1
 * - Per-patch TCS outputs for patch 1
 * - TCS outputs for patch 2            = get_tcs_out_current_patch_offset (if RelPatchID==2)
 * - Per-patch TCS outputs for patch 2  = get_tcs_out_current_patch_data_offset (if RelPatchID==2)
 * - ...
 *
 * All three shaders VS(LS), TCS, TES share the same LDS space.
 */

static LLVMValueRef
get_tcs_in_patch_stride(struct si_shader_context *ctx)
{
        if (ctx->type == PIPE_SHADER_VERTEX)
                return unpack_param(ctx, SI_PARAM_LS_OUT_LAYOUT, 0, 13);
        else if (ctx->type == PIPE_SHADER_TESS_CTRL)
                return unpack_param(ctx, SI_PARAM_TCS_IN_LAYOUT, 0, 13);
        else {
                assert(0);
                return NULL;
        }
}

static LLVMValueRef
get_tcs_out_patch_stride(struct si_shader_context *ctx)
{
        return unpack_param(ctx, SI_PARAM_TCS_OUT_LAYOUT, 0, 13);
}

static LLVMValueRef
get_tcs_out_patch0_offset(struct si_shader_context *ctx)
{
        return lp_build_mul_imm(&ctx->radeon_bld.soa.bld_base.uint_bld,
                                unpack_param(ctx,
                                             SI_PARAM_TCS_OUT_OFFSETS,
                                             0, 16),
                                4);
}

static LLVMValueRef
get_tcs_out_patch0_patch_data_offset(struct si_shader_context *ctx)
{
        return lp_build_mul_imm(&ctx->radeon_bld.soa.bld_base.uint_bld,
                                unpack_param(ctx,
                                             SI_PARAM_TCS_OUT_OFFSETS,
                                             16, 16),
                                4);
}

static LLVMValueRef
get_tcs_in_current_patch_offset(struct si_shader_context *ctx)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMValueRef patch_stride = get_tcs_in_patch_stride(ctx);
        LLVMValueRef rel_patch_id = get_rel_patch_id(ctx);

        return LLVMBuildMul(gallivm->builder, patch_stride, rel_patch_id, "");
}

static LLVMValueRef
get_tcs_out_current_patch_offset(struct si_shader_context *ctx)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMValueRef patch0_offset = get_tcs_out_patch0_offset(ctx);
        LLVMValueRef patch_stride = get_tcs_out_patch_stride(ctx);
        LLVMValueRef rel_patch_id = get_rel_patch_id(ctx);

        return LLVMBuildAdd(gallivm->builder, patch0_offset,
                            LLVMBuildMul(gallivm->builder, patch_stride,
                                         rel_patch_id, ""),
                            "");
}

static LLVMValueRef
get_tcs_out_current_patch_data_offset(struct si_shader_context *ctx)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMValueRef patch0_patch_data_offset =
                get_tcs_out_patch0_patch_data_offset(ctx);
        LLVMValueRef patch_stride = get_tcs_out_patch_stride(ctx);
        LLVMValueRef rel_patch_id = get_rel_patch_id(ctx);

        return LLVMBuildAdd(gallivm->builder, patch0_patch_data_offset,
                            LLVMBuildMul(gallivm->builder, patch_stride,
                                         rel_patch_id, ""),
                            "");
}

static void build_indexed_store(struct si_shader_context *ctx,
                                LLVMValueRef base_ptr, LLVMValueRef index,
                                LLVMValueRef value)
{
        struct lp_build_tgsi_context *bld_base = &ctx->radeon_bld.soa.bld_base;
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMValueRef indices[2], pointer;

        indices[0] = bld_base->uint_bld.zero;
        indices[1] = index;

        pointer = LLVMBuildGEP(gallivm->builder, base_ptr, indices, 2, "");
        LLVMBuildStore(gallivm->builder, value, pointer);
}

/**
 * Build an LLVM bytecode indexed load using LLVMBuildGEP + LLVMBuildLoad.
 * It's equivalent to doing a load from &base_ptr[index].
 *
 * \param base_ptr  Where the array starts.
 * \param index     The element index into the array.
 * \param uniform   Whether the base_ptr and index can be assumed to be
 *                  dynamically uniform
 */
static LLVMValueRef build_indexed_load(struct si_shader_context *ctx,
                                       LLVMValueRef base_ptr, LLVMValueRef index,
                                       bool uniform)
{
        struct lp_build_tgsi_context *bld_base = &ctx->radeon_bld.soa.bld_base;
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMValueRef indices[2], pointer;

        indices[0] = bld_base->uint_bld.zero;
        indices[1] = index;

        pointer = LLVMBuildGEP(gallivm->builder, base_ptr, indices, 2, "");
        if (uniform)
                LLVMSetMetadata(pointer, ctx->uniform_md_kind, ctx->empty_md);
        return LLVMBuildLoad(gallivm->builder, pointer, "");
}

/**
 * Do a load from &base_ptr[index], but also add a flag that it's loading
 * a constant from a dynamically uniform index.
 */
static LLVMValueRef build_indexed_load_const(
        struct si_shader_context *ctx,
        LLVMValueRef base_ptr, LLVMValueRef index)
{
        LLVMValueRef result = build_indexed_load(ctx, base_ptr, index, true);
        LLVMSetMetadata(result, 1, ctx->const_md);
        return result;
}

static LLVMValueRef get_instance_index_for_fetch(
        struct radeon_llvm_context *radeon_bld,
        unsigned param_start_instance, unsigned divisor)
{
        struct si_shader_context *ctx =
                si_shader_context(&radeon_bld->soa.bld_base);
        struct gallivm_state *gallivm = radeon_bld->soa.bld_base.base.gallivm;

        LLVMValueRef result = LLVMGetParam(radeon_bld->main_fn,
                                           ctx->param_instance_id);

        /* The division must be done before START_INSTANCE is added. */
        if (divisor > 1)
                result = LLVMBuildUDiv(gallivm->builder, result,
                                lp_build_const_int32(gallivm, divisor), "");

        return LLVMBuildAdd(gallivm->builder, result,
                            LLVMGetParam(radeon_bld->main_fn, param_start_instance), "");
}

static void declare_input_vs(
        struct radeon_llvm_context *radeon_bld,
        unsigned input_index,
        const struct tgsi_full_declaration *decl)
{
        struct lp_build_context *base = &radeon_bld->soa.bld_base.base;
        struct gallivm_state *gallivm = base->gallivm;
        struct si_shader_context *ctx =
                si_shader_context(&radeon_bld->soa.bld_base);
        unsigned divisor =
                ctx->shader->key.vs.prolog.instance_divisors[input_index];

        unsigned chan;

        LLVMValueRef t_list_ptr;
        LLVMValueRef t_offset;
        LLVMValueRef t_list;
        LLVMValueRef attribute_offset;
        LLVMValueRef buffer_index;
        LLVMValueRef args[3];
        LLVMValueRef input;

        /* Load the T list */
        t_list_ptr = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_VERTEX_BUFFERS);

        t_offset = lp_build_const_int32(gallivm, input_index);

        t_list = build_indexed_load_const(ctx, t_list_ptr, t_offset);

        /* Build the attribute offset */
        attribute_offset = lp_build_const_int32(gallivm, 0);

        if (!ctx->is_monolithic) {
                buffer_index = LLVMGetParam(radeon_bld->main_fn,
                                            ctx->param_vertex_index0 +
                                            input_index);
        } else if (divisor) {
                /* Build index from instance ID, start instance and divisor */
                ctx->shader->info.uses_instanceid = true;
                buffer_index = get_instance_index_for_fetch(&ctx->radeon_bld,
                                                            SI_PARAM_START_INSTANCE,
                                                            divisor);
        } else {
                /* Load the buffer index for vertices. */
                LLVMValueRef vertex_id = LLVMGetParam(ctx->radeon_bld.main_fn,
                                                      ctx->param_vertex_id);
                LLVMValueRef base_vertex = LLVMGetParam(radeon_bld->main_fn,
                                                        SI_PARAM_BASE_VERTEX);
                buffer_index = LLVMBuildAdd(gallivm->builder, base_vertex, vertex_id, "");
        }

        args[0] = t_list;
        args[1] = attribute_offset;
        args[2] = buffer_index;
        input = lp_build_intrinsic(gallivm->builder,
                "llvm.SI.vs.load.input", ctx->v4f32, args, 3,
                LLVMReadNoneAttribute | LLVMNoUnwindAttribute);

        /* Break up the vec4 into individual components */
        for (chan = 0; chan < 4; chan++) {
                LLVMValueRef llvm_chan = lp_build_const_int32(gallivm, chan);
                /* XXX: Use a helper function for this.  There is one in
                 * tgsi_llvm.c. */
                ctx->radeon_bld.inputs[radeon_llvm_reg_index_soa(input_index, chan)] =
                                LLVMBuildExtractElement(gallivm->builder,
                                input, llvm_chan, "");
        }
}

static LLVMValueRef get_primitive_id(struct lp_build_tgsi_context *bld_base,
                                     unsigned swizzle)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);

        if (swizzle > 0)
                return bld_base->uint_bld.zero;

        switch (ctx->type) {
        case PIPE_SHADER_VERTEX:
                return LLVMGetParam(ctx->radeon_bld.main_fn,
                                    ctx->param_vs_prim_id);
        case PIPE_SHADER_TESS_CTRL:
                return LLVMGetParam(ctx->radeon_bld.main_fn,
                                    SI_PARAM_PATCH_ID);
        case PIPE_SHADER_TESS_EVAL:
                return LLVMGetParam(ctx->radeon_bld.main_fn,
                                    ctx->param_tes_patch_id);
        case PIPE_SHADER_GEOMETRY:
                return LLVMGetParam(ctx->radeon_bld.main_fn,
                                    SI_PARAM_PRIMITIVE_ID);
        default:
                assert(0);
                return bld_base->uint_bld.zero;
        }
}

/**
 * Return the value of tgsi_ind_register for indexing.
 * This is the indirect index with the constant offset added to it.
 */
static LLVMValueRef get_indirect_index(struct si_shader_context *ctx,
                                       const struct tgsi_ind_register *ind,
                                       int rel_index)
{
        struct gallivm_state *gallivm = ctx->radeon_bld.soa.bld_base.base.gallivm;
        LLVMValueRef result;

        result = ctx->radeon_bld.soa.addr[ind->Index][ind->Swizzle];
        result = LLVMBuildLoad(gallivm->builder, result, "");
        result = LLVMBuildAdd(gallivm->builder, result,
                              lp_build_const_int32(gallivm, rel_index), "");
        return result;
}

/**
 * Like get_indirect_index, but restricts the return value to a (possibly
 * undefined) value inside [0..num).
 */
static LLVMValueRef get_bounded_indirect_index(struct si_shader_context *ctx,
                                               const struct tgsi_ind_register *ind,
                                               int rel_index, unsigned num)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        LLVMValueRef result = get_indirect_index(ctx, ind, rel_index);
        LLVMValueRef c_max = LLVMConstInt(ctx->i32, num - 1, 0);
        LLVMValueRef cc;

        /* LLVM 3.8: If indirect resource indexing is used:
         * - SI & CIK hang
         * - VI crashes
         */
        if (HAVE_LLVM <= 0x0308)
                return LLVMGetUndef(ctx->i32);

        if (util_is_power_of_two(num)) {
                result = LLVMBuildAnd(builder, result, c_max, "");
        } else {
                /* In theory, this MAX pattern should result in code that is
                 * as good as the bit-wise AND above.
                 *
                 * In practice, LLVM generates worse code (at the time of
                 * writing), because its value tracking is not strong enough.
                 */
                cc = LLVMBuildICmp(builder, LLVMIntULE, result, c_max, "");
                result = LLVMBuildSelect(builder, cc, result, c_max, "");
        }

        return result;
}


/**
 * Calculate a dword address given an input or output register and a stride.
 */
static LLVMValueRef get_dw_address(struct si_shader_context *ctx,
                                   const struct tgsi_full_dst_register *dst,
                                   const struct tgsi_full_src_register *src,
                                   LLVMValueRef vertex_dw_stride,
                                   LLVMValueRef base_addr)
{
        struct gallivm_state *gallivm = ctx->radeon_bld.soa.bld_base.base.gallivm;
        struct tgsi_shader_info *info = &ctx->shader->selector->info;
        ubyte *name, *index, *array_first;
        int first, param;
        struct tgsi_full_dst_register reg;

        /* Set the register description. The address computation is the same
         * for sources and destinations. */
        if (src) {
                reg.Register.File = src->Register.File;
                reg.Register.Index = src->Register.Index;
                reg.Register.Indirect = src->Register.Indirect;
                reg.Register.Dimension = src->Register.Dimension;
                reg.Indirect = src->Indirect;
                reg.Dimension = src->Dimension;
                reg.DimIndirect = src->DimIndirect;
        } else
                reg = *dst;

        /* If the register is 2-dimensional (e.g. an array of vertices
         * in a primitive), calculate the base address of the vertex. */
        if (reg.Register.Dimension) {
                LLVMValueRef index;

                if (reg.Dimension.Indirect)
                        index = get_indirect_index(ctx, &reg.DimIndirect,
                                                   reg.Dimension.Index);
                else
                        index = lp_build_const_int32(gallivm, reg.Dimension.Index);

                base_addr = LLVMBuildAdd(gallivm->builder, base_addr,
                                         LLVMBuildMul(gallivm->builder, index,
                                                      vertex_dw_stride, ""), "");
        }

        /* Get information about the register. */
        if (reg.Register.File == TGSI_FILE_INPUT) {
                name = info->input_semantic_name;
                index = info->input_semantic_index;
                array_first = info->input_array_first;
        } else if (reg.Register.File == TGSI_FILE_OUTPUT) {
                name = info->output_semantic_name;
                index = info->output_semantic_index;
                array_first = info->output_array_first;
        } else {
                assert(0);
                return NULL;
        }

        if (reg.Register.Indirect) {
                /* Add the relative address of the element. */
                LLVMValueRef ind_index;

                if (reg.Indirect.ArrayID)
                        first = array_first[reg.Indirect.ArrayID];
                else
                        first = reg.Register.Index;

                ind_index = get_indirect_index(ctx, &reg.Indirect,
                                           reg.Register.Index - first);

                base_addr = LLVMBuildAdd(gallivm->builder, base_addr,
                                    LLVMBuildMul(gallivm->builder, ind_index,
                                                 lp_build_const_int32(gallivm, 4), ""), "");

                param = si_shader_io_get_unique_index(name[first], index[first]);
        } else {
                param = si_shader_io_get_unique_index(name[reg.Register.Index],
                                                      index[reg.Register.Index]);
        }

        /* Add the base address of the element. */
        return LLVMBuildAdd(gallivm->builder, base_addr,
                            lp_build_const_int32(gallivm, param * 4), "");
}

/* The offchip buffer layout for TCS->TES is
 *
 * - attribute 0 of patch 0 vertex 0
 * - attribute 0 of patch 0 vertex 1
 * - attribute 0 of patch 0 vertex 2
 *   ...
 * - attribute 0 of patch 1 vertex 0
 * - attribute 0 of patch 1 vertex 1
 *   ...
 * - attribute 1 of patch 0 vertex 0
 * - attribute 1 of patch 0 vertex 1
 *   ...
 * - per patch attribute 0 of patch 0
 * - per patch attribute 0 of patch 1
 *   ...
 *
 * Note that every attribute has 4 components.
 */
static LLVMValueRef get_tcs_tes_buffer_address(struct si_shader_context *ctx,
                                               LLVMValueRef vertex_index,
                                               LLVMValueRef param_index)
{
        struct gallivm_state *gallivm = ctx->radeon_bld.soa.bld_base.base.gallivm;
        LLVMValueRef base_addr, vertices_per_patch, num_patches, total_vertices;
        LLVMValueRef param_stride, constant16;

        vertices_per_patch = unpack_param(ctx, SI_PARAM_TCS_OFFCHIP_LAYOUT, 9, 6);
        num_patches = unpack_param(ctx, SI_PARAM_TCS_OFFCHIP_LAYOUT, 0, 9);
        total_vertices = LLVMBuildMul(gallivm->builder, vertices_per_patch,
                                      num_patches, "");

        constant16 = lp_build_const_int32(gallivm, 16);
        if (vertex_index) {
                base_addr = LLVMBuildMul(gallivm->builder, get_rel_patch_id(ctx),
                                         vertices_per_patch, "");

                base_addr = LLVMBuildAdd(gallivm->builder, base_addr,
                                         vertex_index, "");

                param_stride = total_vertices;
        } else {
                base_addr = get_rel_patch_id(ctx);
                param_stride = num_patches;
        }

        base_addr = LLVMBuildAdd(gallivm->builder, base_addr,
                                 LLVMBuildMul(gallivm->builder, param_index,
                                              param_stride, ""), "");

        base_addr = LLVMBuildMul(gallivm->builder, base_addr, constant16, "");

        if (!vertex_index) {
                LLVMValueRef patch_data_offset =
                           unpack_param(ctx, SI_PARAM_TCS_OFFCHIP_LAYOUT, 16, 16);

                base_addr = LLVMBuildAdd(gallivm->builder, base_addr,
                                         patch_data_offset, "");
        }
        return base_addr;
}

static LLVMValueRef get_tcs_tes_buffer_address_from_reg(
                                       struct si_shader_context *ctx,
                                       const struct tgsi_full_dst_register *dst,
                                       const struct tgsi_full_src_register *src)
{
        struct gallivm_state *gallivm = ctx->radeon_bld.soa.bld_base.base.gallivm;
        struct tgsi_shader_info *info = &ctx->shader->selector->info;
        ubyte *name, *index, *array_first;
        struct tgsi_full_src_register reg;
        LLVMValueRef vertex_index = NULL;
        LLVMValueRef param_index = NULL;
        unsigned param_index_base, param_base;

        reg = src ? *src : tgsi_full_src_register_from_dst(dst);

        if (reg.Register.Dimension) {

                if (reg.Dimension.Indirect)
                        vertex_index = get_indirect_index(ctx, &reg.DimIndirect,
                                                          reg.Dimension.Index);
                else
                        vertex_index = lp_build_const_int32(gallivm,
                                                            reg.Dimension.Index);
        }

        /* Get information about the register. */
        if (reg.Register.File == TGSI_FILE_INPUT) {
                name = info->input_semantic_name;
                index = info->input_semantic_index;
                array_first = info->input_array_first;
        } else if (reg.Register.File == TGSI_FILE_OUTPUT) {
                name = info->output_semantic_name;
                index = info->output_semantic_index;
                array_first = info->output_array_first;
        } else {
                assert(0);
                return NULL;
        }

        if (reg.Register.Indirect) {
                if (reg.Indirect.ArrayID)
                        param_base = array_first[reg.Indirect.ArrayID];
                else
                        param_base = reg.Register.Index;

                param_index = get_indirect_index(ctx, &reg.Indirect,
                                                 reg.Register.Index - param_base);

        } else {
                param_base = reg.Register.Index;
                param_index = lp_build_const_int32(gallivm, 0);
        }

        param_index_base = si_shader_io_get_unique_index(name[param_base],
                                                         index[param_base]);

        param_index = LLVMBuildAdd(gallivm->builder, param_index,
                                   lp_build_const_int32(gallivm, param_index_base),
                                   "");

        return get_tcs_tes_buffer_address(ctx, vertex_index, param_index);
}

/* TBUFFER_STORE_FORMAT_{X,XY,XYZ,XYZW} <- the suffix is selected by num_channels=1..4.
 * The type of vdata must be one of i32 (num_channels=1), v2i32 (num_channels=2),
 * or v4i32 (num_channels=3,4). */
static void build_tbuffer_store(struct si_shader_context *ctx,
                                LLVMValueRef rsrc,
                                LLVMValueRef vdata,
                                unsigned num_channels,
                                LLVMValueRef vaddr,
                                LLVMValueRef soffset,
                                unsigned inst_offset,
                                unsigned dfmt,
                                unsigned nfmt,
                                unsigned offen,
                                unsigned idxen,
                                unsigned glc,
                                unsigned slc,
                                unsigned tfe)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMValueRef args[] = {
                rsrc,
                vdata,
                LLVMConstInt(ctx->i32, num_channels, 0),
                vaddr,
                soffset,
                LLVMConstInt(ctx->i32, inst_offset, 0),
                LLVMConstInt(ctx->i32, dfmt, 0),
                LLVMConstInt(ctx->i32, nfmt, 0),
                LLVMConstInt(ctx->i32, offen, 0),
                LLVMConstInt(ctx->i32, idxen, 0),
                LLVMConstInt(ctx->i32, glc, 0),
                LLVMConstInt(ctx->i32, slc, 0),
                LLVMConstInt(ctx->i32, tfe, 0)
        };

        /* The instruction offset field has 12 bits */
        assert(offen || inst_offset < (1 << 12));

        /* The intrinsic is overloaded, we need to add a type suffix for overloading to work. */
        unsigned func = CLAMP(num_channels, 1, 3) - 1;
        const char *types[] = {"i32", "v2i32", "v4i32"};
        char name[256];
        snprintf(name, sizeof(name), "llvm.SI.tbuffer.store.%s", types[func]);

        lp_build_intrinsic(gallivm->builder, name, ctx->voidt,
                           args, ARRAY_SIZE(args), 0);
}

static void build_tbuffer_store_dwords(struct si_shader_context *ctx,
                                     LLVMValueRef rsrc,
                                     LLVMValueRef vdata,
                                     unsigned num_channels,
                                     LLVMValueRef vaddr,
                                     LLVMValueRef soffset,
                                     unsigned inst_offset)
{
        static unsigned dfmt[] = {
                V_008F0C_BUF_DATA_FORMAT_32,
                V_008F0C_BUF_DATA_FORMAT_32_32,
                V_008F0C_BUF_DATA_FORMAT_32_32_32,
                V_008F0C_BUF_DATA_FORMAT_32_32_32_32
        };
        assert(num_channels >= 1 && num_channels <= 4);

        build_tbuffer_store(ctx, rsrc, vdata, num_channels, vaddr, soffset,
                            inst_offset, dfmt[num_channels-1],
                            V_008F0C_BUF_NUM_FORMAT_UINT, 1, 0, 1, 1, 0);
}

static LLVMValueRef build_buffer_load(struct si_shader_context *ctx,
                                      LLVMValueRef rsrc,
                                      int num_channels,
                                      LLVMValueRef vindex,
                                      LLVMValueRef voffset,
                                      LLVMValueRef soffset,
                                      unsigned inst_offset,
                                      unsigned glc,
                                      unsigned slc)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        unsigned func = CLAMP(num_channels, 1, 3) - 1;

        if (HAVE_LLVM >= 0x309) {
                LLVMValueRef args[] = {
                        LLVMBuildBitCast(gallivm->builder, rsrc, ctx->v4i32, ""),
                        vindex ? vindex : LLVMConstInt(ctx->i32, 0, 0),
                        LLVMConstInt(ctx->i32, inst_offset, 0),
                        LLVMConstInt(ctx->i1, glc, 0),
                        LLVMConstInt(ctx->i1, slc, 0)
                };

                LLVMTypeRef types[] = {ctx->f32, LLVMVectorType(ctx->f32, 2),
                                       ctx->v4f32};
                const char *type_names[] = {"f32", "v2f32", "v4f32"};
                char name[256];

                if (voffset) {
                        args[2] = LLVMBuildAdd(gallivm->builder, args[2], voffset,
                                               "");
                }

                if (soffset) {
                        args[2] = LLVMBuildAdd(gallivm->builder, args[2], soffset,
                                               "");
                }

                snprintf(name, sizeof(name), "llvm.amdgcn.buffer.load.%s",
                         type_names[func]);

                return lp_build_intrinsic(gallivm->builder, name, types[func], args,
                                          ARRAY_SIZE(args), LLVMReadOnlyAttribute |
                                          LLVMNoUnwindAttribute);
        } else {
                LLVMValueRef args[] = {
                        LLVMBuildBitCast(gallivm->builder, rsrc, ctx->v16i8, ""),
                        voffset ? voffset : vindex,
                        soffset,
                        LLVMConstInt(ctx->i32, inst_offset, 0),
                        LLVMConstInt(ctx->i32, voffset ? 1 : 0, 0), // offen
                        LLVMConstInt(ctx->i32, vindex ? 1 : 0, 0), //idxen
                        LLVMConstInt(ctx->i32, glc, 0),
                        LLVMConstInt(ctx->i32, slc, 0),
                        LLVMConstInt(ctx->i32, 0, 0), // TFE
                };

                LLVMTypeRef types[] = {ctx->i32, LLVMVectorType(ctx->i32, 2),
                                       ctx->v4i32};
                const char *type_names[] = {"i32", "v2i32", "v4i32"};
                const char *arg_type = "i32";
                char name[256];

                if (voffset && vindex) {
                        LLVMValueRef vaddr[] = {vindex, voffset};

                        arg_type = "v2i32";
                        args[1] = lp_build_gather_values(gallivm, vaddr, 2);
                }

                snprintf(name, sizeof(name), "llvm.SI.buffer.load.dword.%s.%s",
                         type_names[func], arg_type);

                return lp_build_intrinsic(gallivm->builder, name, types[func], args,
                                          ARRAY_SIZE(args), LLVMReadOnlyAttribute |
                                          LLVMNoUnwindAttribute);
        }
}

static LLVMValueRef buffer_load(struct lp_build_tgsi_context *bld_base,
                                enum tgsi_opcode_type type, unsigned swizzle,
                                LLVMValueRef buffer, LLVMValueRef offset,
                                LLVMValueRef base)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMValueRef value, value2;
        LLVMTypeRef llvm_type = tgsi2llvmtype(bld_base, type);
        LLVMTypeRef vec_type = LLVMVectorType(llvm_type, 4);

        if (swizzle == ~0) {
                value = build_buffer_load(ctx, buffer, 4, NULL, base, offset,
                                          0, 1, 0);

                return LLVMBuildBitCast(gallivm->builder, value, vec_type, "");
        }

        if (!tgsi_type_is_64bit(type)) {
                value = build_buffer_load(ctx, buffer, 4, NULL, base, offset,
                                          0, 1, 0);

                value = LLVMBuildBitCast(gallivm->builder, value, vec_type, "");
                return LLVMBuildExtractElement(gallivm->builder, value,
                                    lp_build_const_int32(gallivm, swizzle), "");
        }

        value = build_buffer_load(ctx, buffer, 1, NULL, base, offset,
                                  swizzle * 4, 1, 0);

        value2 = build_buffer_load(ctx, buffer, 1, NULL, base, offset,
                                   swizzle * 4 + 4, 1, 0);

        return radeon_llvm_emit_fetch_64bit(bld_base, type, value, value2);
}

/**
 * Load from LDS.
 *
 * \param type          output value type
 * \param swizzle       offset (typically 0..3); it can be ~0, which loads a vec4
 * \param dw_addr       address in dwords
 */
static LLVMValueRef lds_load(struct lp_build_tgsi_context *bld_base,
                             enum tgsi_opcode_type type, unsigned swizzle,
                             LLVMValueRef dw_addr)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMValueRef value;

        if (swizzle == ~0) {
                LLVMValueRef values[TGSI_NUM_CHANNELS];

                for (unsigned chan = 0; chan < TGSI_NUM_CHANNELS; chan++)
                        values[chan] = lds_load(bld_base, type, chan, dw_addr);

                return lp_build_gather_values(bld_base->base.gallivm, values,
                                              TGSI_NUM_CHANNELS);
        }

        dw_addr = lp_build_add(&bld_base->uint_bld, dw_addr,
                            lp_build_const_int32(gallivm, swizzle));

        value = build_indexed_load(ctx, ctx->lds, dw_addr, false);
        if (tgsi_type_is_64bit(type)) {
                LLVMValueRef value2;
                dw_addr = lp_build_add(&bld_base->uint_bld, dw_addr,
                                       lp_build_const_int32(gallivm, swizzle + 1));
                value2 = build_indexed_load(ctx, ctx->lds, dw_addr, false);
                return radeon_llvm_emit_fetch_64bit(bld_base, type, value, value2);
        }

        return LLVMBuildBitCast(gallivm->builder, value,
                                tgsi2llvmtype(bld_base, type), "");
}

/**
 * Store to LDS.
 *
 * \param swizzle       offset (typically 0..3)
 * \param dw_addr       address in dwords
 * \param value         value to store
 */
static void lds_store(struct lp_build_tgsi_context *bld_base,
                      unsigned swizzle, LLVMValueRef dw_addr,
                      LLVMValueRef value)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;

        dw_addr = lp_build_add(&bld_base->uint_bld, dw_addr,
                            lp_build_const_int32(gallivm, swizzle));

        value = LLVMBuildBitCast(gallivm->builder, value, ctx->i32, "");
        build_indexed_store(ctx, ctx->lds,
                            dw_addr, value);
}

static LLVMValueRef fetch_input_tcs(
        struct lp_build_tgsi_context *bld_base,
        const struct tgsi_full_src_register *reg,
        enum tgsi_opcode_type type, unsigned swizzle)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        LLVMValueRef dw_addr, stride;

        stride = unpack_param(ctx, SI_PARAM_TCS_IN_LAYOUT, 13, 8);
        dw_addr = get_tcs_in_current_patch_offset(ctx);
        dw_addr = get_dw_address(ctx, NULL, reg, stride, dw_addr);

        return lds_load(bld_base, type, swizzle, dw_addr);
}

static LLVMValueRef fetch_output_tcs(
                struct lp_build_tgsi_context *bld_base,
                const struct tgsi_full_src_register *reg,
                enum tgsi_opcode_type type, unsigned swizzle)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        LLVMValueRef dw_addr, stride;

        if (reg->Register.Dimension) {
                stride = unpack_param(ctx, SI_PARAM_TCS_OUT_LAYOUT, 13, 8);
                dw_addr = get_tcs_out_current_patch_offset(ctx);
                dw_addr = get_dw_address(ctx, NULL, reg, stride, dw_addr);
        } else {
                dw_addr = get_tcs_out_current_patch_data_offset(ctx);
                dw_addr = get_dw_address(ctx, NULL, reg, NULL, dw_addr);
        }

        return lds_load(bld_base, type, swizzle, dw_addr);
}

static LLVMValueRef fetch_input_tes(
        struct lp_build_tgsi_context *bld_base,
        const struct tgsi_full_src_register *reg,
        enum tgsi_opcode_type type, unsigned swizzle)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMValueRef rw_buffers, buffer, base, addr;

        rw_buffers = LLVMGetParam(ctx->radeon_bld.main_fn,
                                  SI_PARAM_RW_BUFFERS);
        buffer = build_indexed_load_const(ctx, rw_buffers,
                        lp_build_const_int32(gallivm, SI_HS_RING_TESS_OFFCHIP));

        base = LLVMGetParam(ctx->radeon_bld.main_fn, ctx->param_oc_lds);
        addr = get_tcs_tes_buffer_address_from_reg(ctx, NULL, reg);

        return buffer_load(bld_base, type, swizzle, buffer, base, addr);
}

static void store_output_tcs(struct lp_build_tgsi_context *bld_base,
                             const struct tgsi_full_instruction *inst,
                             const struct tgsi_opcode_info *info,
                             LLVMValueRef dst[4])
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        const struct tgsi_full_dst_register *reg = &inst->Dst[0];
        unsigned chan_index;
        LLVMValueRef dw_addr, stride;
        LLVMValueRef rw_buffers, buffer, base, buf_addr;
        LLVMValueRef values[4];

        /* Only handle per-patch and per-vertex outputs here.
         * Vectors will be lowered to scalars and this function will be called again.
         */
        if (reg->Register.File != TGSI_FILE_OUTPUT ||
            (dst[0] && LLVMGetTypeKind(LLVMTypeOf(dst[0])) == LLVMVectorTypeKind)) {
                radeon_llvm_emit_store(bld_base, inst, info, dst);
                return;
        }

        if (reg->Register.Dimension) {
                stride = unpack_param(ctx, SI_PARAM_TCS_OUT_LAYOUT, 13, 8);
                dw_addr = get_tcs_out_current_patch_offset(ctx);
                dw_addr = get_dw_address(ctx, reg, NULL, stride, dw_addr);
        } else {
                dw_addr = get_tcs_out_current_patch_data_offset(ctx);
                dw_addr = get_dw_address(ctx, reg, NULL, NULL, dw_addr);
        }

        rw_buffers = LLVMGetParam(ctx->radeon_bld.main_fn,
                                  SI_PARAM_RW_BUFFERS);
        buffer = build_indexed_load_const(ctx, rw_buffers,
                        lp_build_const_int32(gallivm, SI_HS_RING_TESS_OFFCHIP));

        base = LLVMGetParam(ctx->radeon_bld.main_fn, ctx->param_oc_lds);
        buf_addr = get_tcs_tes_buffer_address_from_reg(ctx, reg, NULL);


        TGSI_FOR_EACH_DST0_ENABLED_CHANNEL(inst, chan_index) {
                LLVMValueRef value = dst[chan_index];

                if (inst->Instruction.Saturate)
                        value = radeon_llvm_saturate(bld_base, value);

                lds_store(bld_base, chan_index, dw_addr, value);

                value = LLVMBuildBitCast(gallivm->builder, value, ctx->i32, "");
                values[chan_index] = value;

                if (inst->Dst[0].Register.WriteMask != 0xF) {
                        build_tbuffer_store_dwords(ctx, buffer, value, 1,
                                                   buf_addr, base,
                                                   4 * chan_index);
                }
        }

        if (inst->Dst[0].Register.WriteMask == 0xF) {
                LLVMValueRef value = lp_build_gather_values(bld_base->base.gallivm,
                                                            values, 4);
                build_tbuffer_store_dwords(ctx, buffer, value, 4, buf_addr,
                                           base, 0);
        }
}

static LLVMValueRef fetch_input_gs(
        struct lp_build_tgsi_context *bld_base,
        const struct tgsi_full_src_register *reg,
        enum tgsi_opcode_type type,
        unsigned swizzle)
{
        struct lp_build_context *base = &bld_base->base;
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct si_shader *shader = ctx->shader;
        struct lp_build_context *uint = &ctx->radeon_bld.soa.bld_base.uint_bld;
        struct gallivm_state *gallivm = base->gallivm;
        LLVMValueRef vtx_offset;
        LLVMValueRef args[9];
        unsigned vtx_offset_param;
        struct tgsi_shader_info *info = &shader->selector->info;
        unsigned semantic_name = info->input_semantic_name[reg->Register.Index];
        unsigned semantic_index = info->input_semantic_index[reg->Register.Index];
        unsigned param;
        LLVMValueRef value;

        if (swizzle != ~0 && semantic_name == TGSI_SEMANTIC_PRIMID)
                return get_primitive_id(bld_base, swizzle);

        if (!reg->Register.Dimension)
                return NULL;

        if (swizzle == ~0) {
                LLVMValueRef values[TGSI_NUM_CHANNELS];
                unsigned chan;
                for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
                        values[chan] = fetch_input_gs(bld_base, reg, type, chan);
                }
                return lp_build_gather_values(bld_base->base.gallivm, values,
                                              TGSI_NUM_CHANNELS);
        }

        /* Get the vertex offset parameter */
        vtx_offset_param = reg->Dimension.Index;
        if (vtx_offset_param < 2) {
                vtx_offset_param += SI_PARAM_VTX0_OFFSET;
        } else {
                assert(vtx_offset_param < 6);
                vtx_offset_param += SI_PARAM_VTX2_OFFSET - 2;
        }
        vtx_offset = lp_build_mul_imm(uint,
                                      LLVMGetParam(ctx->radeon_bld.main_fn,
                                                   vtx_offset_param),
                                      4);

        param = si_shader_io_get_unique_index(semantic_name, semantic_index);
        args[0] = ctx->esgs_ring;
        args[1] = vtx_offset;
        args[2] = lp_build_const_int32(gallivm, (param * 4 + swizzle) * 256);
        args[3] = uint->zero;
        args[4] = uint->one;  /* OFFEN */
        args[5] = uint->zero; /* IDXEN */
        args[6] = uint->one;  /* GLC */
        args[7] = uint->zero; /* SLC */
        args[8] = uint->zero; /* TFE */

        value = lp_build_intrinsic(gallivm->builder,
                                   "llvm.SI.buffer.load.dword.i32.i32",
                                   ctx->i32, args, 9,
                                   LLVMReadOnlyAttribute | LLVMNoUnwindAttribute);
        if (tgsi_type_is_64bit(type)) {
                LLVMValueRef value2;
                args[2] = lp_build_const_int32(gallivm, (param * 4 + swizzle + 1) * 256);
                value2 = lp_build_intrinsic(gallivm->builder,
                                            "llvm.SI.buffer.load.dword.i32.i32",
                                            ctx->i32, args, 9,
                                            LLVMReadOnlyAttribute | LLVMNoUnwindAttribute);
                return radeon_llvm_emit_fetch_64bit(bld_base, type,
                                                    value, value2);
        }
        return LLVMBuildBitCast(gallivm->builder,
                                value,
                                tgsi2llvmtype(bld_base, type), "");
}

static int lookup_interp_param_index(unsigned interpolate, unsigned location)
{
        switch (interpolate) {
        case TGSI_INTERPOLATE_CONSTANT:
                return 0;

        case TGSI_INTERPOLATE_LINEAR:
                if (location == TGSI_INTERPOLATE_LOC_SAMPLE)
                        return SI_PARAM_LINEAR_SAMPLE;
                else if (location == TGSI_INTERPOLATE_LOC_CENTROID)
                        return SI_PARAM_LINEAR_CENTROID;
                else
                        return SI_PARAM_LINEAR_CENTER;
                break;
        case TGSI_INTERPOLATE_COLOR:
        case TGSI_INTERPOLATE_PERSPECTIVE:
                if (location == TGSI_INTERPOLATE_LOC_SAMPLE)
                        return SI_PARAM_PERSP_SAMPLE;
                else if (location == TGSI_INTERPOLATE_LOC_CENTROID)
                        return SI_PARAM_PERSP_CENTROID;
                else
                        return SI_PARAM_PERSP_CENTER;
                break;
        default:
                fprintf(stderr, "Warning: Unhandled interpolation mode.\n");
                return -1;
        }
}

/* This shouldn't be used by explicit INTERP opcodes. */
static unsigned select_interp_param(struct si_shader_context *ctx,
                                    unsigned param)
{
        if (!ctx->is_monolithic)
                return param;

        /* If the shader doesn't use center/centroid, just return the parameter.
         *
         * If the shader only uses one set of (i,j), "si_emit_spi_ps_input" can
         * switch between center/centroid and sample without shader changes.
         */
        if (ctx->shader->key.ps.prolog.force_persp_sample_interp) {
                switch (param) {
                case SI_PARAM_PERSP_CENTROID:
                case SI_PARAM_PERSP_CENTER:
                        return SI_PARAM_PERSP_SAMPLE;
                }
        }
        if (ctx->shader->key.ps.prolog.force_linear_sample_interp) {
                switch (param) {
                case SI_PARAM_LINEAR_CENTROID:
                case SI_PARAM_LINEAR_CENTER:
                        return SI_PARAM_LINEAR_SAMPLE;
                }
        }
        if (ctx->shader->key.ps.prolog.force_persp_center_interp) {
                switch (param) {
                case SI_PARAM_PERSP_CENTROID:
                case SI_PARAM_PERSP_SAMPLE:
                        return SI_PARAM_PERSP_CENTER;
                }
        }
        if (ctx->shader->key.ps.prolog.force_linear_center_interp) {
                switch (param) {
                case SI_PARAM_LINEAR_CENTROID:
                case SI_PARAM_LINEAR_SAMPLE:
                        return SI_PARAM_PERSP_CENTER;
                }
        }

        return param;
}

/**
 * Interpolate a fragment shader input.
 *
 * @param ctx           context
 * @param input_index           index of the input in hardware
 * @param semantic_name         TGSI_SEMANTIC_*
 * @param semantic_index        semantic index
 * @param num_interp_inputs     number of all interpolated inputs (= BCOLOR offset)
 * @param colors_read_mask      color components read (4 bits for each color, 8 bits in total)
 * @param interp_param          interpolation weights (i,j)
 * @param prim_mask             SI_PARAM_PRIM_MASK
 * @param face                  SI_PARAM_FRONT_FACE
 * @param result                the return value (4 components)
 */
static void interp_fs_input(struct si_shader_context *ctx,
                            unsigned input_index,
                            unsigned semantic_name,
                            unsigned semantic_index,
                            unsigned num_interp_inputs,
                            unsigned colors_read_mask,
                            LLVMValueRef interp_param,
                            LLVMValueRef prim_mask,
                            LLVMValueRef face,
                            LLVMValueRef result[4])
{
        struct lp_build_context *base = &ctx->radeon_bld.soa.bld_base.base;
        struct lp_build_context *uint = &ctx->radeon_bld.soa.bld_base.uint_bld;
        struct gallivm_state *gallivm = base->gallivm;
        const char *intr_name;
        LLVMValueRef attr_number;

        unsigned chan;

        attr_number = lp_build_const_int32(gallivm, input_index);

        /* fs.constant returns the param from the middle vertex, so it's not
         * really useful for flat shading. It's meant to be used for custom
         * interpolation (but the intrinsic can't fetch from the other two
         * vertices).
         *
         * Luckily, it doesn't matter, because we rely on the FLAT_SHADE state
         * to do the right thing. The only reason we use fs.constant is that
         * fs.interp cannot be used on integers, because they can be equal
         * to NaN.
         */
        intr_name = interp_param ? "llvm.SI.fs.interp" : "llvm.SI.fs.constant";

        if (semantic_name == TGSI_SEMANTIC_COLOR &&
            ctx->shader->key.ps.prolog.color_two_side) {
                LLVMValueRef args[4];
                LLVMValueRef is_face_positive;
                LLVMValueRef back_attr_number;

                /* If BCOLOR0 is used, BCOLOR1 is at offset "num_inputs + 1",
                 * otherwise it's at offset "num_inputs".
                 */
                unsigned back_attr_offset = num_interp_inputs;
                if (semantic_index == 1 && colors_read_mask & 0xf)
                        back_attr_offset += 1;

                back_attr_number = lp_build_const_int32(gallivm, back_attr_offset);

                is_face_positive = LLVMBuildICmp(gallivm->builder, LLVMIntNE,
                                                 face, uint->zero, "");

                args[2] = prim_mask;
                args[3] = interp_param;
                for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
                        LLVMValueRef llvm_chan = lp_build_const_int32(gallivm, chan);
                        LLVMValueRef front, back;

                        args[0] = llvm_chan;
                        args[1] = attr_number;
                        front = lp_build_intrinsic(gallivm->builder, intr_name,
                                                ctx->f32, args, args[3] ? 4 : 3,
                                                LLVMReadNoneAttribute | LLVMNoUnwindAttribute);

                        args[1] = back_attr_number;
                        back = lp_build_intrinsic(gallivm->builder, intr_name,
                                               ctx->f32, args, args[3] ? 4 : 3,
                                               LLVMReadNoneAttribute | LLVMNoUnwindAttribute);

                        result[chan] = LLVMBuildSelect(gallivm->builder,
                                                is_face_positive,
                                                front,
                                                back,
                                                "");
                }
        } else if (semantic_name == TGSI_SEMANTIC_FOG) {
                LLVMValueRef args[4];

                args[0] = uint->zero;
                args[1] = attr_number;
                args[2] = prim_mask;
                args[3] = interp_param;
                result[0] = lp_build_intrinsic(gallivm->builder, intr_name,
                                        ctx->f32, args, args[3] ? 4 : 3,
                                        LLVMReadNoneAttribute | LLVMNoUnwindAttribute);
                result[1] =
                result[2] = lp_build_const_float(gallivm, 0.0f);
                result[3] = lp_build_const_float(gallivm, 1.0f);
        } else {
                for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
                        LLVMValueRef args[4];
                        LLVMValueRef llvm_chan = lp_build_const_int32(gallivm, chan);

                        args[0] = llvm_chan;
                        args[1] = attr_number;
                        args[2] = prim_mask;
                        args[3] = interp_param;
                        result[chan] = lp_build_intrinsic(gallivm->builder, intr_name,
                                                ctx->f32, args, args[3] ? 4 : 3,
                                                LLVMReadNoneAttribute | LLVMNoUnwindAttribute);
                }
        }
}

/* LLVMGetParam with bc_optimize resolved. */
static LLVMValueRef get_interp_param(struct si_shader_context *ctx,
                                     int interp_param_idx)
{
        LLVMBuilderRef builder = ctx->radeon_bld.gallivm.builder;
        LLVMValueRef main_fn = ctx->radeon_bld.main_fn;
        LLVMValueRef param = NULL;

        /* Handle PRIM_MASK[31] (bc_optimize). */
        if (ctx->is_monolithic &&
            ((ctx->shader->key.ps.prolog.bc_optimize_for_persp &&
              interp_param_idx == SI_PARAM_PERSP_CENTROID) ||
             (ctx->shader->key.ps.prolog.bc_optimize_for_linear &&
              interp_param_idx == SI_PARAM_LINEAR_CENTROID))) {
                /* The shader should do: if (PRIM_MASK[31]) CENTROID = CENTER;
                 * The hw doesn't compute CENTROID if the whole wave only
                 * contains fully-covered quads.
                 */
                LLVMValueRef bc_optimize =
                        LLVMGetParam(main_fn, SI_PARAM_PRIM_MASK);
                bc_optimize = LLVMBuildLShr(builder,
                                            bc_optimize,
                                            LLVMConstInt(ctx->i32, 31, 0), "");
                bc_optimize = LLVMBuildTrunc(builder, bc_optimize, ctx->i1, "");

                if (ctx->shader->key.ps.prolog.bc_optimize_for_persp &&
                    interp_param_idx == SI_PARAM_PERSP_CENTROID) {
                        param = LLVMBuildSelect(builder, bc_optimize,
                                                LLVMGetParam(main_fn,
                                                             SI_PARAM_PERSP_CENTER),
                                                LLVMGetParam(main_fn,
                                                             SI_PARAM_PERSP_CENTROID),
                                                "");
                }
                if (ctx->shader->key.ps.prolog.bc_optimize_for_linear &&
                    interp_param_idx == SI_PARAM_LINEAR_CENTROID) {
                        param = LLVMBuildSelect(builder, bc_optimize,
                                                LLVMGetParam(main_fn,
                                                             SI_PARAM_LINEAR_CENTER),
                                                LLVMGetParam(main_fn,
                                                             SI_PARAM_LINEAR_CENTROID),
                                                "");
                }
        }

        if (!param)
                param = LLVMGetParam(main_fn, interp_param_idx);
        return param;
}

static void declare_input_fs(
        struct radeon_llvm_context *radeon_bld,
        unsigned input_index,
        const struct tgsi_full_declaration *decl)
{
        struct lp_build_context *base = &radeon_bld->soa.bld_base.base;
        struct si_shader_context *ctx =
                si_shader_context(&radeon_bld->soa.bld_base);
        struct si_shader *shader = ctx->shader;
        LLVMValueRef main_fn = radeon_bld->main_fn;
        LLVMValueRef interp_param = NULL;
        int interp_param_idx;

        /* Get colors from input VGPRs (set by the prolog). */
        if (!ctx->is_monolithic &&
            decl->Semantic.Name == TGSI_SEMANTIC_COLOR) {
                unsigned i = decl->Semantic.Index;
                unsigned colors_read = shader->selector->info.colors_read;
                unsigned mask = colors_read >> (i * 4);
                unsigned offset = SI_PARAM_POS_FIXED_PT + 1 +
                                  (i ? util_bitcount(colors_read & 0xf) : 0);

                radeon_bld->inputs[radeon_llvm_reg_index_soa(input_index, 0)] =
                        mask & 0x1 ? LLVMGetParam(main_fn, offset++) : base->undef;
                radeon_bld->inputs[radeon_llvm_reg_index_soa(input_index, 1)] =
                        mask & 0x2 ? LLVMGetParam(main_fn, offset++) : base->undef;
                radeon_bld->inputs[radeon_llvm_reg_index_soa(input_index, 2)] =
                        mask & 0x4 ? LLVMGetParam(main_fn, offset++) : base->undef;
                radeon_bld->inputs[radeon_llvm_reg_index_soa(input_index, 3)] =
                        mask & 0x8 ? LLVMGetParam(main_fn, offset++) : base->undef;
                return;
        }

        interp_param_idx = lookup_interp_param_index(decl->Interp.Interpolate,
                                                     decl->Interp.Location);
        if (interp_param_idx == -1)
                return;
        else if (interp_param_idx) {
                interp_param_idx = select_interp_param(ctx,
                                                       interp_param_idx);
                interp_param = get_interp_param(ctx, interp_param_idx);
        }

        if (decl->Semantic.Name == TGSI_SEMANTIC_COLOR &&
            decl->Interp.Interpolate == TGSI_INTERPOLATE_COLOR &&
            ctx->shader->key.ps.prolog.flatshade_colors)
                interp_param = NULL; /* load the constant color */

        interp_fs_input(ctx, input_index, decl->Semantic.Name,
                        decl->Semantic.Index, shader->selector->info.num_inputs,
                        shader->selector->info.colors_read, interp_param,
                        LLVMGetParam(main_fn, SI_PARAM_PRIM_MASK),
                        LLVMGetParam(main_fn, SI_PARAM_FRONT_FACE),
                        &radeon_bld->inputs[radeon_llvm_reg_index_soa(input_index, 0)]);
}

static LLVMValueRef get_sample_id(struct radeon_llvm_context *radeon_bld)
{
        return unpack_param(si_shader_context(&radeon_bld->soa.bld_base),
                            SI_PARAM_ANCILLARY, 8, 4);
}

/**
 * Set range metadata on an instruction.  This can only be used on load and
 * call instructions.  If you know an instruction can only produce the values
 * 0, 1, 2, you would do set_range_metadata(value, 0, 3);
 * \p lo is the minimum value inclusive.
 * \p hi is the maximum value exclusive.
 */
static void set_range_metadata(LLVMValueRef value, unsigned lo, unsigned hi)
{
        const char *range_md_string = "range";
        LLVMValueRef range_md, md_args[2];
        LLVMTypeRef type = LLVMTypeOf(value);
        LLVMContextRef context = LLVMGetTypeContext(type);
        unsigned md_range_id = LLVMGetMDKindIDInContext(context,
                                range_md_string, strlen(range_md_string));

        md_args[0] = LLVMConstInt(type, lo, false);
        md_args[1] = LLVMConstInt(type, hi, false);
        range_md = LLVMMDNodeInContext(context, md_args, 2);
        LLVMSetMetadata(value, md_range_id, range_md);
}

static LLVMValueRef get_thread_id(struct si_shader_context *ctx)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMValueRef tid;

        if (HAVE_LLVM < 0x0308) {
                tid = lp_build_intrinsic(gallivm->builder, "llvm.SI.tid",
                                ctx->i32,   NULL, 0, LLVMReadNoneAttribute);
        } else {
                LLVMValueRef tid_args[2];
                tid_args[0] = lp_build_const_int32(gallivm, 0xffffffff);
                tid_args[1] = lp_build_const_int32(gallivm, 0);
                tid_args[1] = lp_build_intrinsic(gallivm->builder,
                                        "llvm.amdgcn.mbcnt.lo", ctx->i32,
                                        tid_args, 2, LLVMReadNoneAttribute);

                tid = lp_build_intrinsic(gallivm->builder,
                                        "llvm.amdgcn.mbcnt.hi", ctx->i32,
                                        tid_args, 2, LLVMReadNoneAttribute);
        }
        set_range_metadata(tid, 0, 64);
        return tid;
}

/**
 * Load a dword from a constant buffer.
 */
static LLVMValueRef buffer_load_const(LLVMBuilderRef builder, LLVMValueRef resource,
                                      LLVMValueRef offset, LLVMTypeRef return_type)
{
        LLVMValueRef args[2] = {resource, offset};

        return lp_build_intrinsic(builder, "llvm.SI.load.const", return_type, args, 2,
                               LLVMReadNoneAttribute | LLVMNoUnwindAttribute);
}

static LLVMValueRef load_sample_position(struct radeon_llvm_context *radeon_bld, LLVMValueRef sample_id)
{
        struct si_shader_context *ctx =
                si_shader_context(&radeon_bld->soa.bld_base);
        struct lp_build_context *uint_bld = &radeon_bld->soa.bld_base.uint_bld;
        struct gallivm_state *gallivm = &radeon_bld->gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        LLVMValueRef desc = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_RW_BUFFERS);
        LLVMValueRef buf_index = lp_build_const_int32(gallivm, SI_PS_CONST_SAMPLE_POSITIONS);
        LLVMValueRef resource = build_indexed_load_const(ctx, desc, buf_index);

        /* offset = sample_id * 8  (8 = 2 floats containing samplepos.xy) */
        LLVMValueRef offset0 = lp_build_mul_imm(uint_bld, sample_id, 8);
        LLVMValueRef offset1 = LLVMBuildAdd(builder, offset0, lp_build_const_int32(gallivm, 4), "");

        LLVMValueRef pos[4] = {
                buffer_load_const(builder, resource, offset0, ctx->f32),
                buffer_load_const(builder, resource, offset1, ctx->f32),
                lp_build_const_float(gallivm, 0),
                lp_build_const_float(gallivm, 0)
        };

        return lp_build_gather_values(gallivm, pos, 4);
}

static void declare_system_value(
        struct radeon_llvm_context *radeon_bld,
        unsigned index,
        const struct tgsi_full_declaration *decl)
{
        struct si_shader_context *ctx =
                si_shader_context(&radeon_bld->soa.bld_base);
        struct lp_build_context *bld = &radeon_bld->soa.bld_base.base;
        struct gallivm_state *gallivm = &radeon_bld->gallivm;
        LLVMValueRef value = 0;

        switch (decl->Semantic.Name) {
        case TGSI_SEMANTIC_INSTANCEID:
                value = LLVMGetParam(radeon_bld->main_fn,
                                     ctx->param_instance_id);
                break;

        case TGSI_SEMANTIC_VERTEXID:
                value = LLVMBuildAdd(gallivm->builder,
                                     LLVMGetParam(radeon_bld->main_fn,
                                                  ctx->param_vertex_id),
                                     LLVMGetParam(radeon_bld->main_fn,
                                                  SI_PARAM_BASE_VERTEX), "");
                break;

        case TGSI_SEMANTIC_VERTEXID_NOBASE:
                value = LLVMGetParam(radeon_bld->main_fn,
                                     ctx->param_vertex_id);
                break;

        case TGSI_SEMANTIC_BASEVERTEX:
                value = LLVMGetParam(radeon_bld->main_fn,
                                     SI_PARAM_BASE_VERTEX);
                break;

        case TGSI_SEMANTIC_INVOCATIONID:
                if (ctx->type == PIPE_SHADER_TESS_CTRL)
                        value = unpack_param(ctx, SI_PARAM_REL_IDS, 8, 5);
                else if (ctx->type == PIPE_SHADER_GEOMETRY)
                        value = LLVMGetParam(radeon_bld->main_fn,
                                             SI_PARAM_GS_INSTANCE_ID);
                else
                        assert(!"INVOCATIONID not implemented");
                break;

        case TGSI_SEMANTIC_POSITION:
        {
                LLVMValueRef pos[4] = {
                        LLVMGetParam(radeon_bld->main_fn, SI_PARAM_POS_X_FLOAT),
                        LLVMGetParam(radeon_bld->main_fn, SI_PARAM_POS_Y_FLOAT),
                        LLVMGetParam(radeon_bld->main_fn, SI_PARAM_POS_Z_FLOAT),
                        lp_build_emit_llvm_unary(&radeon_bld->soa.bld_base, TGSI_OPCODE_RCP,
                                                 LLVMGetParam(radeon_bld->main_fn,
                                                              SI_PARAM_POS_W_FLOAT)),
                };
                value = lp_build_gather_values(gallivm, pos, 4);
                break;
        }

        case TGSI_SEMANTIC_FACE:
                value = LLVMGetParam(radeon_bld->main_fn, SI_PARAM_FRONT_FACE);
                break;

        case TGSI_SEMANTIC_SAMPLEID:
                value = get_sample_id(radeon_bld);
                break;

        case TGSI_SEMANTIC_SAMPLEPOS: {
                LLVMValueRef pos[4] = {
                        LLVMGetParam(radeon_bld->main_fn, SI_PARAM_POS_X_FLOAT),
                        LLVMGetParam(radeon_bld->main_fn, SI_PARAM_POS_Y_FLOAT),
                        lp_build_const_float(gallivm, 0),
                        lp_build_const_float(gallivm, 0)
                };
                pos[0] = lp_build_emit_llvm_unary(&radeon_bld->soa.bld_base,
                                                  TGSI_OPCODE_FRC, pos[0]);
                pos[1] = lp_build_emit_llvm_unary(&radeon_bld->soa.bld_base,
                                                  TGSI_OPCODE_FRC, pos[1]);
                value = lp_build_gather_values(gallivm, pos, 4);
                break;
        }

        case TGSI_SEMANTIC_SAMPLEMASK:
                /* This can only occur with the OpenGL Core profile, which
                 * doesn't support smoothing.
                 */
                value = LLVMGetParam(radeon_bld->main_fn, SI_PARAM_SAMPLE_COVERAGE);
                break;

        case TGSI_SEMANTIC_TESSCOORD:
        {
                LLVMValueRef coord[4] = {
                        LLVMGetParam(radeon_bld->main_fn, ctx->param_tes_u),
                        LLVMGetParam(radeon_bld->main_fn, ctx->param_tes_v),
                        bld->zero,
                        bld->zero
                };

                /* For triangles, the vector should be (u, v, 1-u-v). */
                if (ctx->shader->selector->info.properties[TGSI_PROPERTY_TES_PRIM_MODE] ==
                    PIPE_PRIM_TRIANGLES)
                        coord[2] = lp_build_sub(bld, bld->one,
                                                lp_build_add(bld, coord[0], coord[1]));

                value = lp_build_gather_values(gallivm, coord, 4);
                break;
        }

        case TGSI_SEMANTIC_VERTICESIN:
                value = unpack_param(ctx, SI_PARAM_TCS_OUT_LAYOUT, 26, 6);
                break;

        case TGSI_SEMANTIC_TESSINNER:
        case TGSI_SEMANTIC_TESSOUTER:
        {
                LLVMValueRef rw_buffers, buffer, base, addr;
                int param = si_shader_io_get_unique_index(decl->Semantic.Name, 0);

                rw_buffers = LLVMGetParam(ctx->radeon_bld.main_fn,
                                        SI_PARAM_RW_BUFFERS);
                buffer = build_indexed_load_const(ctx, rw_buffers,
                        lp_build_const_int32(gallivm, SI_HS_RING_TESS_OFFCHIP));

                base = LLVMGetParam(ctx->radeon_bld.main_fn, ctx->param_oc_lds);
                addr = get_tcs_tes_buffer_address(ctx, NULL,
                                          lp_build_const_int32(gallivm, param));

                value = buffer_load(&radeon_bld->soa.bld_base, TGSI_TYPE_FLOAT,
                                    ~0, buffer, base, addr);

                break;
        }

        case TGSI_SEMANTIC_DEFAULT_TESSOUTER_SI:
        case TGSI_SEMANTIC_DEFAULT_TESSINNER_SI:
        {
                LLVMValueRef buf, slot, val[4];
                int i, offset;

                slot = lp_build_const_int32(gallivm, SI_HS_CONST_DEFAULT_TESS_LEVELS);
                buf = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_RW_BUFFERS);
                buf = build_indexed_load_const(ctx, buf, slot);
                offset = decl->Semantic.Name == TGSI_SEMANTIC_DEFAULT_TESSINNER_SI ? 4 : 0;

                for (i = 0; i < 4; i++)
                        val[i] = buffer_load_const(gallivm->builder, buf,
                                                   lp_build_const_int32(gallivm, (offset + i) * 4),
                                                   ctx->f32);
                value = lp_build_gather_values(gallivm, val, 4);
                break;
        }

        case TGSI_SEMANTIC_PRIMID:
                value = get_primitive_id(&radeon_bld->soa.bld_base, 0);
                break;

        case TGSI_SEMANTIC_GRID_SIZE:
                value = LLVMGetParam(radeon_bld->main_fn, SI_PARAM_GRID_SIZE);
                break;

        case TGSI_SEMANTIC_BLOCK_SIZE:
        {
                LLVMValueRef values[3];
                unsigned i;
                unsigned *properties = ctx->shader->selector->info.properties;
                unsigned sizes[3] = {
                        properties[TGSI_PROPERTY_CS_FIXED_BLOCK_WIDTH],
                        properties[TGSI_PROPERTY_CS_FIXED_BLOCK_HEIGHT],
                        properties[TGSI_PROPERTY_CS_FIXED_BLOCK_DEPTH]
                };

                for (i = 0; i < 3; ++i)
                        values[i] = lp_build_const_int32(gallivm, sizes[i]);

                value = lp_build_gather_values(gallivm, values, 3);
                break;
        }

        case TGSI_SEMANTIC_BLOCK_ID:
                value = LLVMGetParam(radeon_bld->main_fn, SI_PARAM_BLOCK_ID);
                break;

        case TGSI_SEMANTIC_THREAD_ID:
                value = LLVMGetParam(radeon_bld->main_fn, SI_PARAM_THREAD_ID);
                break;

#if HAVE_LLVM >= 0x0309
        case TGSI_SEMANTIC_HELPER_INVOCATION:
                value = lp_build_intrinsic(gallivm->builder,
                                           "llvm.amdgcn.ps.live",
                                           ctx->i1, NULL, 0,
                                           LLVMReadNoneAttribute | LLVMNoUnwindAttribute);
                value = LLVMBuildNot(gallivm->builder, value, "");
                value = LLVMBuildSExt(gallivm->builder, value, ctx->i32, "");
                break;
#endif

        default:
                assert(!"unknown system value");
                return;
        }

        radeon_bld->system_values[index] = value;
}

static void declare_compute_memory(struct radeon_llvm_context *radeon_bld,
                                   const struct tgsi_full_declaration *decl)
{
        struct si_shader_context *ctx =
                si_shader_context(&radeon_bld->soa.bld_base);
        struct si_shader_selector *sel = ctx->shader->selector;
        struct gallivm_state *gallivm = &radeon_bld->gallivm;

        LLVMTypeRef i8p = LLVMPointerType(ctx->i8, LOCAL_ADDR_SPACE);
        LLVMValueRef var;

        assert(decl->Declaration.MemType == TGSI_MEMORY_TYPE_SHARED);
        assert(decl->Range.First == decl->Range.Last);
        assert(!ctx->shared_memory);

        var = LLVMAddGlobalInAddressSpace(gallivm->module,
                                          LLVMArrayType(ctx->i8, sel->local_size),
                                          "compute_lds",
                                          LOCAL_ADDR_SPACE);
        LLVMSetAlignment(var, 4);

        ctx->shared_memory = LLVMBuildBitCast(gallivm->builder, var, i8p, "");
}

static LLVMValueRef fetch_constant(
        struct lp_build_tgsi_context *bld_base,
        const struct tgsi_full_src_register *reg,
        enum tgsi_opcode_type type,
        unsigned swizzle)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct lp_build_context *base = &bld_base->base;
        const struct tgsi_ind_register *ireg = &reg->Indirect;
        unsigned buf, idx;

        LLVMValueRef addr, bufp;
        LLVMValueRef result;

        if (swizzle == LP_CHAN_ALL) {
                unsigned chan;
                LLVMValueRef values[4];
                for (chan = 0; chan < TGSI_NUM_CHANNELS; ++chan)
                        values[chan] = fetch_constant(bld_base, reg, type, chan);

                return lp_build_gather_values(bld_base->base.gallivm, values, 4);
        }

        buf = reg->Register.Dimension ? reg->Dimension.Index : 0;
        idx = reg->Register.Index * 4 + swizzle;

        if (!reg->Register.Indirect && !reg->Dimension.Indirect) {
                if (!tgsi_type_is_64bit(type))
                        return bitcast(bld_base, type, ctx->constants[buf][idx]);
                else {
                        return radeon_llvm_emit_fetch_64bit(bld_base, type,
                                                            ctx->constants[buf][idx],
                                                            ctx->constants[buf][idx + 1]);
                }
        }

        if (reg->Register.Dimension && reg->Dimension.Indirect) {
                LLVMValueRef ptr = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_CONST_BUFFERS);
                LLVMValueRef index;
                index = get_bounded_indirect_index(ctx, &reg->DimIndirect,
                                                   reg->Dimension.Index,
                                                   SI_NUM_CONST_BUFFERS);
                bufp = build_indexed_load_const(ctx, ptr, index);
        } else
                bufp = ctx->const_buffers[buf];

        addr = ctx->radeon_bld.soa.addr[ireg->Index][ireg->Swizzle];
        addr = LLVMBuildLoad(base->gallivm->builder, addr, "load addr reg");
        addr = lp_build_mul_imm(&bld_base->uint_bld, addr, 16);
        addr = lp_build_add(&bld_base->uint_bld, addr,
                            lp_build_const_int32(base->gallivm, idx * 4));

        result = buffer_load_const(base->gallivm->builder, bufp,
                                   addr, ctx->f32);

        if (!tgsi_type_is_64bit(type))
                result = bitcast(bld_base, type, result);
        else {
                LLVMValueRef addr2, result2;
                addr2 = ctx->radeon_bld.soa.addr[ireg->Index][ireg->Swizzle + 1];
                addr2 = LLVMBuildLoad(base->gallivm->builder, addr2, "load addr reg2");
                addr2 = lp_build_mul_imm(&bld_base->uint_bld, addr2, 16);
                addr2 = lp_build_add(&bld_base->uint_bld, addr2,
                                     lp_build_const_int32(base->gallivm, idx * 4));

                result2 = buffer_load_const(base->gallivm->builder, ctx->const_buffers[buf],
                                   addr2, ctx->f32);

                result = radeon_llvm_emit_fetch_64bit(bld_base, type,
                                                      result, result2);
        }
        return result;
}

/* Upper 16 bits must be zero. */
static LLVMValueRef si_llvm_pack_two_int16(struct gallivm_state *gallivm,
                                           LLVMValueRef val[2])
{
        return LLVMBuildOr(gallivm->builder, val[0],
                           LLVMBuildShl(gallivm->builder, val[1],
                                        lp_build_const_int32(gallivm, 16),
                                        ""), "");
}

/* Upper 16 bits are ignored and will be dropped. */
static LLVMValueRef si_llvm_pack_two_int32_as_int16(struct gallivm_state *gallivm,
                                                    LLVMValueRef val[2])
{
        LLVMValueRef v[2] = {
                LLVMBuildAnd(gallivm->builder, val[0],
                             lp_build_const_int32(gallivm, 0xffff), ""),
                val[1],
        };
        return si_llvm_pack_two_int16(gallivm, v);
}

/* Initialize arguments for the shader export intrinsic */
static void si_llvm_init_export_args(struct lp_build_tgsi_context *bld_base,
                                     LLVMValueRef *values,
                                     unsigned target,
                                     LLVMValueRef *args)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct lp_build_context *uint =
                                &ctx->radeon_bld.soa.bld_base.uint_bld;
        struct lp_build_context *base = &bld_base->base;
        struct gallivm_state *gallivm = base->gallivm;
        LLVMBuilderRef builder = base->gallivm->builder;
        LLVMValueRef val[4];
        unsigned spi_shader_col_format = V_028714_SPI_SHADER_32_ABGR;
        unsigned chan;
        bool is_int8;

        /* Default is 0xf. Adjusted below depending on the format. */
        args[0] = lp_build_const_int32(base->gallivm, 0xf); /* writemask */

        /* Specify whether the EXEC mask represents the valid mask */
        args[1] = uint->zero;

        /* Specify whether this is the last export */
        args[2] = uint->zero;

        /* Specify the target we are exporting */
        args[3] = lp_build_const_int32(base->gallivm, target);

        if (ctx->type == PIPE_SHADER_FRAGMENT) {
                const union si_shader_key *key = &ctx->shader->key;
                unsigned col_formats = key->ps.epilog.spi_shader_col_format;
                int cbuf = target - V_008DFC_SQ_EXP_MRT;

                assert(cbuf >= 0 && cbuf < 8);
                spi_shader_col_format = (col_formats >> (cbuf * 4)) & 0xf;
                is_int8 = (key->ps.epilog.color_is_int8 >> cbuf) & 0x1;
        }

        args[4] = uint->zero; /* COMPR flag */
        args[5] = base->undef;
        args[6] = base->undef;
        args[7] = base->undef;
        args[8] = base->undef;

        switch (spi_shader_col_format) {
        case V_028714_SPI_SHADER_ZERO:
                args[0] = uint->zero; /* writemask */
                args[3] = lp_build_const_int32(base->gallivm, V_008DFC_SQ_EXP_NULL);
                break;

        case V_028714_SPI_SHADER_32_R:
                args[0] = uint->one; /* writemask */
                args[5] = values[0];
                break;

        case V_028714_SPI_SHADER_32_GR:
                args[0] = lp_build_const_int32(base->gallivm, 0x3); /* writemask */
                args[5] = values[0];
                args[6] = values[1];
                break;

        case V_028714_SPI_SHADER_32_AR:
                args[0] = lp_build_const_int32(base->gallivm, 0x9); /* writemask */
                args[5] = values[0];
                args[8] = values[3];
                break;

        case V_028714_SPI_SHADER_FP16_ABGR:
                args[4] = uint->one; /* COMPR flag */

                for (chan = 0; chan < 2; chan++) {
                        LLVMValueRef pack_args[2] = {
                                values[2 * chan],
                                values[2 * chan + 1]
                        };
                        LLVMValueRef packed;

                        packed = lp_build_intrinsic(base->gallivm->builder,
                                                    "llvm.SI.packf16",
                                                    ctx->i32, pack_args, 2,
                                                    LLVMReadNoneAttribute | LLVMNoUnwindAttribute);
                        args[chan + 5] =
                                LLVMBuildBitCast(base->gallivm->builder,
                                                 packed, ctx->f32, "");
                }
                break;

        case V_028714_SPI_SHADER_UNORM16_ABGR:
                for (chan = 0; chan < 4; chan++) {
                        val[chan] = radeon_llvm_saturate(bld_base, values[chan]);
                        val[chan] = LLVMBuildFMul(builder, val[chan],
                                                  lp_build_const_float(gallivm, 65535), "");
                        val[chan] = LLVMBuildFAdd(builder, val[chan],
                                                  lp_build_const_float(gallivm, 0.5), "");
                        val[chan] = LLVMBuildFPToUI(builder, val[chan],
                                                    ctx->i32, "");
                }

                args[4] = uint->one; /* COMPR flag */
                args[5] = bitcast(bld_base, TGSI_TYPE_FLOAT,
                                  si_llvm_pack_two_int16(gallivm, val));
                args[6] = bitcast(bld_base, TGSI_TYPE_FLOAT,
                                  si_llvm_pack_two_int16(gallivm, val+2));
                break;

        case V_028714_SPI_SHADER_SNORM16_ABGR:
                for (chan = 0; chan < 4; chan++) {
                        /* Clamp between [-1, 1]. */
                        val[chan] = lp_build_emit_llvm_binary(bld_base, TGSI_OPCODE_MIN,
                                                              values[chan],
                                                              lp_build_const_float(gallivm, 1));
                        val[chan] = lp_build_emit_llvm_binary(bld_base, TGSI_OPCODE_MAX,
                                                              val[chan],
                                                              lp_build_const_float(gallivm, -1));
                        /* Convert to a signed integer in [-32767, 32767]. */
                        val[chan] = LLVMBuildFMul(builder, val[chan],
                                                  lp_build_const_float(gallivm, 32767), "");
                        /* If positive, add 0.5, else add -0.5. */
                        val[chan] = LLVMBuildFAdd(builder, val[chan],
                                        LLVMBuildSelect(builder,
                                                LLVMBuildFCmp(builder, LLVMRealOGE,
                                                              val[chan], base->zero, ""),
                                                lp_build_const_float(gallivm, 0.5),
                                                lp_build_const_float(gallivm, -0.5), ""), "");
                        val[chan] = LLVMBuildFPToSI(builder, val[chan], ctx->i32, "");
                }

                args[4] = uint->one; /* COMPR flag */
                args[5] = bitcast(bld_base, TGSI_TYPE_FLOAT,
                                  si_llvm_pack_two_int32_as_int16(gallivm, val));
                args[6] = bitcast(bld_base, TGSI_TYPE_FLOAT,
                                  si_llvm_pack_two_int32_as_int16(gallivm, val+2));
                break;

        case V_028714_SPI_SHADER_UINT16_ABGR: {
                LLVMValueRef max = lp_build_const_int32(gallivm, is_int8 ?
                                                        255 : 65535);
                /* Clamp. */
                for (chan = 0; chan < 4; chan++) {
                        val[chan] = bitcast(bld_base, TGSI_TYPE_UNSIGNED, values[chan]);
                        val[chan] = lp_build_emit_llvm_binary(bld_base, TGSI_OPCODE_UMIN,
                                                              val[chan], max);
                }

                args[4] = uint->one; /* COMPR flag */
                args[5] = bitcast(bld_base, TGSI_TYPE_FLOAT,
                                  si_llvm_pack_two_int16(gallivm, val));
                args[6] = bitcast(bld_base, TGSI_TYPE_FLOAT,
                                  si_llvm_pack_two_int16(gallivm, val+2));
                break;
        }

        case V_028714_SPI_SHADER_SINT16_ABGR: {
                LLVMValueRef max = lp_build_const_int32(gallivm, is_int8 ?
                                                        127 : 32767);
                LLVMValueRef min = lp_build_const_int32(gallivm, is_int8 ?
                                                        -128 : -32768);
                /* Clamp. */
                for (chan = 0; chan < 4; chan++) {
                        val[chan] = bitcast(bld_base, TGSI_TYPE_UNSIGNED, values[chan]);
                        val[chan] = lp_build_emit_llvm_binary(bld_base,
                                                              TGSI_OPCODE_IMIN,
                                                              val[chan], max);
                        val[chan] = lp_build_emit_llvm_binary(bld_base,
                                                              TGSI_OPCODE_IMAX,
                                                              val[chan], min);
                }

                args[4] = uint->one; /* COMPR flag */
                args[5] = bitcast(bld_base, TGSI_TYPE_FLOAT,
                                  si_llvm_pack_two_int32_as_int16(gallivm, val));
                args[6] = bitcast(bld_base, TGSI_TYPE_FLOAT,
                                  si_llvm_pack_two_int32_as_int16(gallivm, val+2));
                break;
        }

        case V_028714_SPI_SHADER_32_ABGR:
                memcpy(&args[5], values, sizeof(values[0]) * 4);
                break;
        }
}

static void si_alpha_test(struct lp_build_tgsi_context *bld_base,
                          LLVMValueRef alpha)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;

        if (ctx->shader->key.ps.epilog.alpha_func != PIPE_FUNC_NEVER) {
                LLVMValueRef alpha_ref = LLVMGetParam(ctx->radeon_bld.main_fn,
                                SI_PARAM_ALPHA_REF);

                LLVMValueRef alpha_pass =
                        lp_build_cmp(&bld_base->base,
                                     ctx->shader->key.ps.epilog.alpha_func,
                                     alpha, alpha_ref);
                LLVMValueRef arg =
                        lp_build_select(&bld_base->base,
                                        alpha_pass,
                                        lp_build_const_float(gallivm, 1.0f),
                                        lp_build_const_float(gallivm, -1.0f));

                lp_build_intrinsic(gallivm->builder, "llvm.AMDGPU.kill",
                                   ctx->voidt, &arg, 1, 0);
        } else {
                lp_build_intrinsic(gallivm->builder, "llvm.AMDGPU.kilp",
                                   ctx->voidt, NULL, 0, 0);
        }
}

static LLVMValueRef si_scale_alpha_by_sample_mask(struct lp_build_tgsi_context *bld_base,
                                                  LLVMValueRef alpha,
                                                  unsigned samplemask_param)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMValueRef coverage;

        /* alpha = alpha * popcount(coverage) / SI_NUM_SMOOTH_AA_SAMPLES */
        coverage = LLVMGetParam(ctx->radeon_bld.main_fn,
                                samplemask_param);
        coverage = bitcast(bld_base, TGSI_TYPE_SIGNED, coverage);

        coverage = lp_build_intrinsic(gallivm->builder, "llvm.ctpop.i32",
                                   ctx->i32,
                                   &coverage, 1, LLVMReadNoneAttribute);

        coverage = LLVMBuildUIToFP(gallivm->builder, coverage,
                                   ctx->f32, "");

        coverage = LLVMBuildFMul(gallivm->builder, coverage,
                                 lp_build_const_float(gallivm,
                                        1.0 / SI_NUM_SMOOTH_AA_SAMPLES), "");

        return LLVMBuildFMul(gallivm->builder, alpha, coverage, "");
}

static void si_llvm_emit_clipvertex(struct lp_build_tgsi_context *bld_base,
                                    LLVMValueRef (*pos)[9], LLVMValueRef *out_elts)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct lp_build_context *base = &bld_base->base;
        struct lp_build_context *uint = &ctx->radeon_bld.soa.bld_base.uint_bld;
        unsigned reg_index;
        unsigned chan;
        unsigned const_chan;
        LLVMValueRef base_elt;
        LLVMValueRef ptr = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_RW_BUFFERS);
        LLVMValueRef constbuf_index = lp_build_const_int32(base->gallivm,
                                                           SI_VS_CONST_CLIP_PLANES);
        LLVMValueRef const_resource = build_indexed_load_const(ctx, ptr, constbuf_index);

        for (reg_index = 0; reg_index < 2; reg_index ++) {
                LLVMValueRef *args = pos[2 + reg_index];

                args[5] =
                args[6] =
                args[7] =
                args[8] = lp_build_const_float(base->gallivm, 0.0f);

                /* Compute dot products of position and user clip plane vectors */
                for (chan = 0; chan < TGSI_NUM_CHANNELS; chan++) {
                        for (const_chan = 0; const_chan < TGSI_NUM_CHANNELS; const_chan++) {
                                args[1] = lp_build_const_int32(base->gallivm,
                                                               ((reg_index * 4 + chan) * 4 +
                                                                const_chan) * 4);
                                base_elt = buffer_load_const(base->gallivm->builder, const_resource,
                                                      args[1], ctx->f32);
                                args[5 + chan] =
                                        lp_build_add(base, args[5 + chan],
                                                     lp_build_mul(base, base_elt,
                                                                  out_elts[const_chan]));
                        }
                }

                args[0] = lp_build_const_int32(base->gallivm, 0xf);
                args[1] = uint->zero;
                args[2] = uint->zero;
                args[3] = lp_build_const_int32(base->gallivm,
                                               V_008DFC_SQ_EXP_POS + 2 + reg_index);
                args[4] = uint->zero;
        }
}

static void si_dump_streamout(struct pipe_stream_output_info *so)
{
        unsigned i;

        if (so->num_outputs)
                fprintf(stderr, "STREAMOUT\n");

        for (i = 0; i < so->num_outputs; i++) {
                unsigned mask = ((1 << so->output[i].num_components) - 1) <<
                                so->output[i].start_component;
                fprintf(stderr, "  %i: BUF%i[%i..%i] <- OUT[%i].%s%s%s%s\n",
                        i, so->output[i].output_buffer,
                        so->output[i].dst_offset, so->output[i].dst_offset + so->output[i].num_components - 1,
                        so->output[i].register_index,
                        mask & 1 ? "x" : "",
                        mask & 2 ? "y" : "",
                        mask & 4 ? "z" : "",
                        mask & 8 ? "w" : "");
        }
}

/* On SI, the vertex shader is responsible for writing streamout data
 * to buffers. */
static void si_llvm_emit_streamout(struct si_shader_context *ctx,
                                   struct si_shader_output_values *outputs,
                                   unsigned noutput)
{
        struct pipe_stream_output_info *so = &ctx->shader->selector->so;
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        int i, j;
        struct lp_build_if_state if_ctx;

        /* Get bits [22:16], i.e. (so_param >> 16) & 127; */
        LLVMValueRef so_vtx_count =
                unpack_param(ctx, ctx->param_streamout_config, 16, 7);

        LLVMValueRef tid = get_thread_id(ctx);

        /* can_emit = tid < so_vtx_count; */
        LLVMValueRef can_emit =
                LLVMBuildICmp(builder, LLVMIntULT, tid, so_vtx_count, "");

        LLVMValueRef stream_id =
                unpack_param(ctx, ctx->param_streamout_config, 24, 2);

        /* Emit the streamout code conditionally. This actually avoids
         * out-of-bounds buffer access. The hw tells us via the SGPR
         * (so_vtx_count) which threads are allowed to emit streamout data. */
        lp_build_if(&if_ctx, gallivm, can_emit);
        {
                /* The buffer offset is computed as follows:
                 *   ByteOffset = streamout_offset[buffer_id]*4 +
                 *                (streamout_write_index + thread_id)*stride[buffer_id] +
                 *                attrib_offset
                 */

                LLVMValueRef so_write_index =
                        LLVMGetParam(ctx->radeon_bld.main_fn,
                                     ctx->param_streamout_write_index);

                /* Compute (streamout_write_index + thread_id). */
                so_write_index = LLVMBuildAdd(builder, so_write_index, tid, "");

                /* Compute the write offset for each enabled buffer. */
                LLVMValueRef so_write_offset[4] = {};
                for (i = 0; i < 4; i++) {
                        if (!so->stride[i])
                                continue;

                        LLVMValueRef so_offset = LLVMGetParam(ctx->radeon_bld.main_fn,
                                                              ctx->param_streamout_offset[i]);
                        so_offset = LLVMBuildMul(builder, so_offset, LLVMConstInt(ctx->i32, 4, 0), "");

                        so_write_offset[i] = LLVMBuildMul(builder, so_write_index,
                                                          LLVMConstInt(ctx->i32, so->stride[i]*4, 0), "");
                        so_write_offset[i] = LLVMBuildAdd(builder, so_write_offset[i], so_offset, "");
                }

                /* Write streamout data. */
                for (i = 0; i < so->num_outputs; i++) {
                        unsigned buf_idx = so->output[i].output_buffer;
                        unsigned reg = so->output[i].register_index;
                        unsigned start = so->output[i].start_component;
                        unsigned num_comps = so->output[i].num_components;
                        unsigned stream = so->output[i].stream;
                        LLVMValueRef out[4];
                        struct lp_build_if_state if_ctx_stream;

                        assert(num_comps && num_comps <= 4);
                        if (!num_comps || num_comps > 4)
                                continue;

                        if (reg >= noutput)
                                continue;

                        /* Load the output as int. */
                        for (j = 0; j < num_comps; j++) {
                                out[j] = LLVMBuildBitCast(builder,
                                                          outputs[reg].values[start+j],
                                                ctx->i32, "");
                        }

                        /* Pack the output. */
                        LLVMValueRef vdata = NULL;

                        switch (num_comps) {
                        case 1: /* as i32 */
                                vdata = out[0];
                                break;
                        case 2: /* as v2i32 */
                        case 3: /* as v4i32 (aligned to 4) */
                        case 4: /* as v4i32 */
                                vdata = LLVMGetUndef(LLVMVectorType(ctx->i32, util_next_power_of_two(num_comps)));
                                for (j = 0; j < num_comps; j++) {
                                        vdata = LLVMBuildInsertElement(builder, vdata, out[j],
                                                                       LLVMConstInt(ctx->i32, j, 0), "");
                                }
                                break;
                        }

                        LLVMValueRef can_emit_stream =
                                LLVMBuildICmp(builder, LLVMIntEQ,
                                              stream_id,
                                              lp_build_const_int32(gallivm, stream), "");

                        lp_build_if(&if_ctx_stream, gallivm, can_emit_stream);
                        build_tbuffer_store_dwords(ctx, ctx->so_buffers[buf_idx],
                                                   vdata, num_comps,
                                                   so_write_offset[buf_idx],
                                                   LLVMConstInt(ctx->i32, 0, 0),
                                                   so->output[i].dst_offset*4);
                        lp_build_endif(&if_ctx_stream);
                }
        }
        lp_build_endif(&if_ctx);
}


/* Generate export instructions for hardware VS shader stage */
static void si_llvm_export_vs(struct lp_build_tgsi_context *bld_base,
                              struct si_shader_output_values *outputs,
                              unsigned noutput)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct si_shader *shader = ctx->shader;
        struct lp_build_context *base = &bld_base->base;
        struct lp_build_context *uint =
                                &ctx->radeon_bld.soa.bld_base.uint_bld;
        LLVMValueRef args[9];
        LLVMValueRef pos_args[4][9] = { { 0 } };
        LLVMValueRef psize_value = NULL, edgeflag_value = NULL, layer_value = NULL, viewport_index_value = NULL;
        unsigned semantic_name, semantic_index;
        unsigned target;
        unsigned param_count = 0;
        unsigned pos_idx;
        int i;

        if (outputs && ctx->shader->selector->so.num_outputs) {
                si_llvm_emit_streamout(ctx, outputs, noutput);
        }

        for (i = 0; i < noutput; i++) {
                semantic_name = outputs[i].name;
                semantic_index = outputs[i].sid;

handle_semantic:
                /* Select the correct target */
                switch(semantic_name) {
                case TGSI_SEMANTIC_PSIZE:
                        psize_value = outputs[i].values[0];
                        continue;
                case TGSI_SEMANTIC_EDGEFLAG:
                        edgeflag_value = outputs[i].values[0];
                        continue;
                case TGSI_SEMANTIC_LAYER:
                        layer_value = outputs[i].values[0];
                        semantic_name = TGSI_SEMANTIC_GENERIC;
                        goto handle_semantic;
                case TGSI_SEMANTIC_VIEWPORT_INDEX:
                        viewport_index_value = outputs[i].values[0];
                        semantic_name = TGSI_SEMANTIC_GENERIC;
                        goto handle_semantic;
                case TGSI_SEMANTIC_POSITION:
                        target = V_008DFC_SQ_EXP_POS;
                        break;
                case TGSI_SEMANTIC_COLOR:
                case TGSI_SEMANTIC_BCOLOR:
                        target = V_008DFC_SQ_EXP_PARAM + param_count;
                        assert(i < ARRAY_SIZE(shader->info.vs_output_param_offset));
                        shader->info.vs_output_param_offset[i] = param_count;
                        param_count++;
                        break;
                case TGSI_SEMANTIC_CLIPDIST:
                        target = V_008DFC_SQ_EXP_POS + 2 + semantic_index;
                        break;
                case TGSI_SEMANTIC_CLIPVERTEX:
                        si_llvm_emit_clipvertex(bld_base, pos_args, outputs[i].values);
                        continue;
                case TGSI_SEMANTIC_PRIMID:
                case TGSI_SEMANTIC_FOG:
                case TGSI_SEMANTIC_TEXCOORD:
                case TGSI_SEMANTIC_GENERIC:
                        target = V_008DFC_SQ_EXP_PARAM + param_count;
                        assert(i < ARRAY_SIZE(shader->info.vs_output_param_offset));
                        shader->info.vs_output_param_offset[i] = param_count;
                        param_count++;
                        break;
                default:
                        target = 0;
                        fprintf(stderr,
                                "Warning: SI unhandled vs output type:%d\n",
                                semantic_name);
                }

                si_llvm_init_export_args(bld_base, outputs[i].values, target, args);

                if (target >= V_008DFC_SQ_EXP_POS &&
                    target <= (V_008DFC_SQ_EXP_POS + 3)) {
                        memcpy(pos_args[target - V_008DFC_SQ_EXP_POS],
                               args, sizeof(args));
                } else {
                        lp_build_intrinsic(base->gallivm->builder,
                                           "llvm.SI.export", ctx->voidt,
                                           args, 9, 0);
                }

                if (semantic_name == TGSI_SEMANTIC_CLIPDIST) {
                        semantic_name = TGSI_SEMANTIC_GENERIC;
                        goto handle_semantic;
                }
        }

        shader->info.nr_param_exports = param_count;

        /* We need to add the position output manually if it's missing. */
        if (!pos_args[0][0]) {
                pos_args[0][0] = lp_build_const_int32(base->gallivm, 0xf); /* writemask */
                pos_args[0][1] = uint->zero; /* EXEC mask */
                pos_args[0][2] = uint->zero; /* last export? */
                pos_args[0][3] = lp_build_const_int32(base->gallivm, V_008DFC_SQ_EXP_POS);
                pos_args[0][4] = uint->zero; /* COMPR flag */
                pos_args[0][5] = base->zero; /* X */
                pos_args[0][6] = base->zero; /* Y */
                pos_args[0][7] = base->zero; /* Z */
                pos_args[0][8] = base->one;  /* W */
        }

        /* Write the misc vector (point size, edgeflag, layer, viewport). */
        if (shader->selector->info.writes_psize ||
            shader->selector->info.writes_edgeflag ||
            shader->selector->info.writes_viewport_index ||
            shader->selector->info.writes_layer) {
                pos_args[1][0] = lp_build_const_int32(base->gallivm, /* writemask */
                                                      shader->selector->info.writes_psize |
                                                      (shader->selector->info.writes_edgeflag << 1) |
                                                      (shader->selector->info.writes_layer << 2) |
                                                      (shader->selector->info.writes_viewport_index << 3));
                pos_args[1][1] = uint->zero; /* EXEC mask */
                pos_args[1][2] = uint->zero; /* last export? */
                pos_args[1][3] = lp_build_const_int32(base->gallivm, V_008DFC_SQ_EXP_POS + 1);
                pos_args[1][4] = uint->zero; /* COMPR flag */
                pos_args[1][5] = base->zero; /* X */
                pos_args[1][6] = base->zero; /* Y */
                pos_args[1][7] = base->zero; /* Z */
                pos_args[1][8] = base->zero; /* W */

                if (shader->selector->info.writes_psize)
                        pos_args[1][5] = psize_value;

                if (shader->selector->info.writes_edgeflag) {
                        /* The output is a float, but the hw expects an integer
                         * with the first bit containing the edge flag. */
                        edgeflag_value = LLVMBuildFPToUI(base->gallivm->builder,
                                                         edgeflag_value,
                                                         ctx->i32, "");
                        edgeflag_value = lp_build_min(&bld_base->int_bld,
                                                      edgeflag_value,
                                                      bld_base->int_bld.one);

                        /* The LLVM intrinsic expects a float. */
                        pos_args[1][6] = LLVMBuildBitCast(base->gallivm->builder,
                                                          edgeflag_value,
                                                          ctx->f32, "");
                }

                if (shader->selector->info.writes_layer)
                        pos_args[1][7] = layer_value;

                if (shader->selector->info.writes_viewport_index)
                        pos_args[1][8] = viewport_index_value;
        }

        for (i = 0; i < 4; i++)
                if (pos_args[i][0])
                        shader->info.nr_pos_exports++;

        pos_idx = 0;
        for (i = 0; i < 4; i++) {
                if (!pos_args[i][0])
                        continue;

                /* Specify the target we are exporting */
                pos_args[i][3] = lp_build_const_int32(base->gallivm, V_008DFC_SQ_EXP_POS + pos_idx++);

                if (pos_idx == shader->info.nr_pos_exports)
                        /* Specify that this is the last export */
                        pos_args[i][2] = uint->one;

                lp_build_intrinsic(base->gallivm->builder, "llvm.SI.export",
                                   ctx->voidt, pos_args[i], 9, 0);
        }
}

static void si_copy_tcs_inputs(struct lp_build_tgsi_context *bld_base)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMValueRef invocation_id, rw_buffers, buffer, buffer_offset;
        LLVMValueRef lds_vertex_stride, lds_vertex_offset, lds_base;
        uint64_t inputs;

        invocation_id = unpack_param(ctx, SI_PARAM_REL_IDS, 8, 5);

        rw_buffers = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_RW_BUFFERS);
        buffer = build_indexed_load_const(ctx, rw_buffers,
                        lp_build_const_int32(gallivm, SI_HS_RING_TESS_OFFCHIP));

        buffer_offset = LLVMGetParam(ctx->radeon_bld.main_fn, ctx->param_oc_lds);

        lds_vertex_stride = unpack_param(ctx, SI_PARAM_TCS_IN_LAYOUT, 13, 8);
        lds_vertex_offset = LLVMBuildMul(gallivm->builder, invocation_id,
                                         lds_vertex_stride, "");
        lds_base = get_tcs_in_current_patch_offset(ctx);
        lds_base = LLVMBuildAdd(gallivm->builder, lds_base, lds_vertex_offset, "");

        inputs = ctx->shader->key.tcs.epilog.inputs_to_copy;
        while (inputs) {
                unsigned i = u_bit_scan64(&inputs);

                LLVMValueRef lds_ptr = LLVMBuildAdd(gallivm->builder, lds_base,
                                            lp_build_const_int32(gallivm, 4 * i),
                                             "");

                LLVMValueRef buffer_addr = get_tcs_tes_buffer_address(ctx,
                                              invocation_id,
                                              lp_build_const_int32(gallivm, i));

                LLVMValueRef value = lds_load(bld_base, TGSI_TYPE_SIGNED, ~0,
                                              lds_ptr);

                build_tbuffer_store_dwords(ctx, buffer, value, 4, buffer_addr,
                                           buffer_offset, 0);
        }
}

static void si_write_tess_factors(struct lp_build_tgsi_context *bld_base,
                                  LLVMValueRef rel_patch_id,
                                  LLVMValueRef invocation_id,
                                  LLVMValueRef tcs_out_current_patch_data_offset)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        struct si_shader *shader = ctx->shader;
        unsigned tess_inner_index, tess_outer_index;
        LLVMValueRef lds_base, lds_inner, lds_outer, byteoffset, buffer;
        LLVMValueRef out[6], vec0, vec1, rw_buffers, tf_base;
        unsigned stride, outer_comps, inner_comps, i;
        struct lp_build_if_state if_ctx, inner_if_ctx;

        si_llvm_emit_barrier(NULL, bld_base, NULL);

        /* Do this only for invocation 0, because the tess levels are per-patch,
         * not per-vertex.
         *
         * This can't jump, because invocation 0 executes this. It should
         * at least mask out the loads and stores for other invocations.
         */
        lp_build_if(&if_ctx, gallivm,
                    LLVMBuildICmp(gallivm->builder, LLVMIntEQ,
                                  invocation_id, bld_base->uint_bld.zero, ""));

        /* Determine the layout of one tess factor element in the buffer. */
        switch (shader->key.tcs.epilog.prim_mode) {
        case PIPE_PRIM_LINES:
                stride = 2; /* 2 dwords, 1 vec2 store */
                outer_comps = 2;
                inner_comps = 0;
                break;
        case PIPE_PRIM_TRIANGLES:
                stride = 4; /* 4 dwords, 1 vec4 store */
                outer_comps = 3;
                inner_comps = 1;
                break;
        case PIPE_PRIM_QUADS:
                stride = 6; /* 6 dwords, 2 stores (vec4 + vec2) */
                outer_comps = 4;
                inner_comps = 2;
                break;
        default:
                assert(0);
                return;
        }

        /* Load tess_inner and tess_outer from LDS.
         * Any invocation can write them, so we can't get them from a temporary.
         */
        tess_inner_index = si_shader_io_get_unique_index(TGSI_SEMANTIC_TESSINNER, 0);
        tess_outer_index = si_shader_io_get_unique_index(TGSI_SEMANTIC_TESSOUTER, 0);

        lds_base = tcs_out_current_patch_data_offset;
        lds_inner = LLVMBuildAdd(gallivm->builder, lds_base,
                                 lp_build_const_int32(gallivm,
                                                      tess_inner_index * 4), "");
        lds_outer = LLVMBuildAdd(gallivm->builder, lds_base,
                                 lp_build_const_int32(gallivm,
                                                      tess_outer_index * 4), "");

        for (i = 0; i < outer_comps; i++)
                out[i] = lds_load(bld_base, TGSI_TYPE_SIGNED, i, lds_outer);
        for (i = 0; i < inner_comps; i++)
                out[outer_comps+i] = lds_load(bld_base, TGSI_TYPE_SIGNED, i, lds_inner);

        /* Convert the outputs to vectors for stores. */
        vec0 = lp_build_gather_values(gallivm, out, MIN2(stride, 4));
        vec1 = NULL;

        if (stride > 4)
                vec1 = lp_build_gather_values(gallivm, out+4, stride - 4);

        /* Get the buffer. */
        rw_buffers = LLVMGetParam(ctx->radeon_bld.main_fn,
                                  SI_PARAM_RW_BUFFERS);
        buffer = build_indexed_load_const(ctx, rw_buffers,
                        lp_build_const_int32(gallivm, SI_HS_RING_TESS_FACTOR));

        /* Get the offset. */
        tf_base = LLVMGetParam(ctx->radeon_bld.main_fn,
                               SI_PARAM_TESS_FACTOR_OFFSET);
        byteoffset = LLVMBuildMul(gallivm->builder, rel_patch_id,
                                  lp_build_const_int32(gallivm, 4 * stride), "");

        lp_build_if(&inner_if_ctx, gallivm,
                    LLVMBuildICmp(gallivm->builder, LLVMIntEQ,
                                  rel_patch_id, bld_base->uint_bld.zero, ""));

        /* Store the dynamic HS control word. */
        build_tbuffer_store_dwords(ctx, buffer,
                                   lp_build_const_int32(gallivm, 0x80000000),
                                   1, lp_build_const_int32(gallivm, 0), tf_base, 0);

        lp_build_endif(&inner_if_ctx);

        /* Store the tessellation factors. */
        build_tbuffer_store_dwords(ctx, buffer, vec0,
                                   MIN2(stride, 4), byteoffset, tf_base, 4);
        if (vec1)
                build_tbuffer_store_dwords(ctx, buffer, vec1,
                                           stride - 4, byteoffset, tf_base, 20);
        lp_build_endif(&if_ctx);
}

/* This only writes the tessellation factor levels. */
static void si_llvm_emit_tcs_epilogue(struct lp_build_tgsi_context *bld_base)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        LLVMValueRef rel_patch_id, invocation_id, tf_lds_offset;

        rel_patch_id = get_rel_patch_id(ctx);
        invocation_id = unpack_param(ctx, SI_PARAM_REL_IDS, 8, 5);
        tf_lds_offset = get_tcs_out_current_patch_data_offset(ctx);

        if (!ctx->is_monolithic) {
                /* Return epilog parameters from this function. */
                LLVMBuilderRef builder = bld_base->base.gallivm->builder;
                LLVMValueRef ret = ctx->return_value;
                LLVMValueRef rw_buffers, rw0, rw1, tf_soffset;
                unsigned vgpr;

                /* RW_BUFFERS pointer */
                rw_buffers = LLVMGetParam(ctx->radeon_bld.main_fn,
                                          SI_PARAM_RW_BUFFERS);
                rw_buffers = LLVMBuildPtrToInt(builder, rw_buffers, ctx->i64, "");
                rw_buffers = LLVMBuildBitCast(builder, rw_buffers, ctx->v2i32, "");
                rw0 = LLVMBuildExtractElement(builder, rw_buffers,
                                              bld_base->uint_bld.zero, "");
                rw1 = LLVMBuildExtractElement(builder, rw_buffers,
                                              bld_base->uint_bld.one, "");
                ret = LLVMBuildInsertValue(builder, ret, rw0, 0, "");
                ret = LLVMBuildInsertValue(builder, ret, rw1, 1, "");

                /* Tess factor buffer soffset is after user SGPRs. */
                tf_soffset = LLVMGetParam(ctx->radeon_bld.main_fn,
                                          SI_PARAM_TESS_FACTOR_OFFSET);
                ret = LLVMBuildInsertValue(builder, ret, tf_soffset,
                                           SI_TCS_NUM_USER_SGPR + 1, "");

                /* VGPRs */
                rel_patch_id = bitcast(bld_base, TGSI_TYPE_FLOAT, rel_patch_id);
                invocation_id = bitcast(bld_base, TGSI_TYPE_FLOAT, invocation_id);
                tf_lds_offset = bitcast(bld_base, TGSI_TYPE_FLOAT, tf_lds_offset);

                vgpr = SI_TCS_NUM_USER_SGPR + 2;
                ret = LLVMBuildInsertValue(builder, ret, rel_patch_id, vgpr++, "");
                ret = LLVMBuildInsertValue(builder, ret, invocation_id, vgpr++, "");
                ret = LLVMBuildInsertValue(builder, ret, tf_lds_offset, vgpr++, "");
                ctx->return_value = ret;
                return;
        }

        si_copy_tcs_inputs(bld_base);
        si_write_tess_factors(bld_base, rel_patch_id, invocation_id, tf_lds_offset);
}

static void si_llvm_emit_ls_epilogue(struct lp_build_tgsi_context *bld_base)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct si_shader *shader = ctx->shader;
        struct tgsi_shader_info *info = &shader->selector->info;
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        unsigned i, chan;
        LLVMValueRef vertex_id = LLVMGetParam(ctx->radeon_bld.main_fn,
                                              ctx->param_rel_auto_id);
        LLVMValueRef vertex_dw_stride =
                unpack_param(ctx, SI_PARAM_LS_OUT_LAYOUT, 13, 8);
        LLVMValueRef base_dw_addr = LLVMBuildMul(gallivm->builder, vertex_id,
                                                 vertex_dw_stride, "");

        /* Write outputs to LDS. The next shader (TCS aka HS) will read
         * its inputs from it. */
        for (i = 0; i < info->num_outputs; i++) {
                LLVMValueRef *out_ptr = ctx->radeon_bld.soa.outputs[i];
                unsigned name = info->output_semantic_name[i];
                unsigned index = info->output_semantic_index[i];
                int param = si_shader_io_get_unique_index(name, index);
                LLVMValueRef dw_addr = LLVMBuildAdd(gallivm->builder, base_dw_addr,
                                        lp_build_const_int32(gallivm, param * 4), "");

                for (chan = 0; chan < 4; chan++) {
                        lds_store(bld_base, chan, dw_addr,
                                  LLVMBuildLoad(gallivm->builder, out_ptr[chan], ""));
                }
        }
}

static void si_llvm_emit_es_epilogue(struct lp_build_tgsi_context *bld_base)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        struct si_shader *es = ctx->shader;
        struct tgsi_shader_info *info = &es->selector->info;
        LLVMValueRef soffset = LLVMGetParam(ctx->radeon_bld.main_fn,
                                            ctx->param_es2gs_offset);
        unsigned chan;
        int i;

        for (i = 0; i < info->num_outputs; i++) {
                LLVMValueRef *out_ptr =
                        ctx->radeon_bld.soa.outputs[i];
                int param_index;

                if (info->output_semantic_name[i] == TGSI_SEMANTIC_VIEWPORT_INDEX ||
                    info->output_semantic_name[i] == TGSI_SEMANTIC_LAYER)
                        continue;

                param_index = si_shader_io_get_unique_index(info->output_semantic_name[i],
                                                            info->output_semantic_index[i]);

                for (chan = 0; chan < 4; chan++) {
                        LLVMValueRef out_val = LLVMBuildLoad(gallivm->builder, out_ptr[chan], "");
                        out_val = LLVMBuildBitCast(gallivm->builder, out_val, ctx->i32, "");

                        build_tbuffer_store(ctx,
                                            ctx->esgs_ring,
                                            out_val, 1,
                                            LLVMGetUndef(ctx->i32), soffset,
                                            (4 * param_index + chan) * 4,
                                            V_008F0C_BUF_DATA_FORMAT_32,
                                            V_008F0C_BUF_NUM_FORMAT_UINT,
                                            0, 0, 1, 1, 0);
                }
        }
}

static void si_llvm_emit_gs_epilogue(struct lp_build_tgsi_context *bld_base)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMValueRef args[2];

        args[0] = lp_build_const_int32(gallivm, SENDMSG_GS_OP_NOP | SENDMSG_GS_DONE);
        args[1] = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_GS_WAVE_ID);
        lp_build_intrinsic(gallivm->builder, "llvm.SI.sendmsg",
                           ctx->voidt, args, 2, LLVMNoUnwindAttribute);
}

static void si_llvm_emit_vs_epilogue(struct lp_build_tgsi_context *bld_base)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        struct tgsi_shader_info *info = &ctx->shader->selector->info;
        struct si_shader_output_values *outputs = NULL;
        int i,j;

        assert(!ctx->is_gs_copy_shader);

        outputs = MALLOC((info->num_outputs + 1) * sizeof(outputs[0]));

        /* Vertex color clamping.
         *
         * This uses a state constant loaded in a user data SGPR and
         * an IF statement is added that clamps all colors if the constant
         * is true.
         */
        if (ctx->type == PIPE_SHADER_VERTEX) {
                struct lp_build_if_state if_ctx;
                LLVMValueRef cond = NULL;
                LLVMValueRef addr, val;

                for (i = 0; i < info->num_outputs; i++) {
                        if (info->output_semantic_name[i] != TGSI_SEMANTIC_COLOR &&
                            info->output_semantic_name[i] != TGSI_SEMANTIC_BCOLOR)
                                continue;

                        /* We've found a color. */
                        if (!cond) {
                                /* The state is in the first bit of the user SGPR. */
                                cond = LLVMGetParam(ctx->radeon_bld.main_fn,
                                                    SI_PARAM_VS_STATE_BITS);
                                cond = LLVMBuildTrunc(gallivm->builder, cond,
                                                      ctx->i1, "");
                                lp_build_if(&if_ctx, gallivm, cond);
                        }

                        for (j = 0; j < 4; j++) {
                                addr = ctx->radeon_bld.soa.outputs[i][j];
                                val = LLVMBuildLoad(gallivm->builder, addr, "");
                                val = radeon_llvm_saturate(bld_base, val);
                                LLVMBuildStore(gallivm->builder, val, addr);
                        }
                }

                if (cond)
                        lp_build_endif(&if_ctx);
        }

        for (i = 0; i < info->num_outputs; i++) {
                outputs[i].name = info->output_semantic_name[i];
                outputs[i].sid = info->output_semantic_index[i];

                for (j = 0; j < 4; j++)
                        outputs[i].values[j] =
                                LLVMBuildLoad(gallivm->builder,
                                              ctx->radeon_bld.soa.outputs[i][j],
                                              "");
        }

        if (ctx->is_monolithic) {
                /* Export PrimitiveID when PS needs it. */
                if (si_vs_exports_prim_id(ctx->shader)) {
                        outputs[i].name = TGSI_SEMANTIC_PRIMID;
                        outputs[i].sid = 0;
                        outputs[i].values[0] = bitcast(bld_base, TGSI_TYPE_FLOAT,
                                                       get_primitive_id(bld_base, 0));
                        outputs[i].values[1] = bld_base->base.undef;
                        outputs[i].values[2] = bld_base->base.undef;
                        outputs[i].values[3] = bld_base->base.undef;
                        i++;
                }
        } else {
                /* Return the primitive ID from the LLVM function. */
                ctx->return_value =
                        LLVMBuildInsertValue(gallivm->builder,
                                             ctx->return_value,
                                             bitcast(bld_base, TGSI_TYPE_FLOAT,
                                                     get_primitive_id(bld_base, 0)),
                                             VS_EPILOG_PRIMID_LOC, "");
        }

        si_llvm_export_vs(bld_base, outputs, i);
        FREE(outputs);
}

static void si_export_mrt_z(struct lp_build_tgsi_context *bld_base,
                           LLVMValueRef depth, LLVMValueRef stencil,
                           LLVMValueRef samplemask)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct lp_build_context *base = &bld_base->base;
        struct lp_build_context *uint = &bld_base->uint_bld;
        LLVMValueRef args[9];
        unsigned mask = 0;

        assert(depth || stencil || samplemask);

        args[1] = uint->one; /* whether the EXEC mask is valid */
        args[2] = uint->one; /* DONE bit */

        /* Specify the target we are exporting */
        args[3] = lp_build_const_int32(base->gallivm, V_008DFC_SQ_EXP_MRTZ);

        args[4] = uint->zero; /* COMP flag */
        args[5] = base->undef; /* R, depth */
        args[6] = base->undef; /* G, stencil test value[0:7], stencil op value[8:15] */
        args[7] = base->undef; /* B, sample mask */
        args[8] = base->undef; /* A, alpha to mask */

        if (depth) {
                args[5] = depth;
                mask |= 0x1;
        }

        if (stencil) {
                args[6] = stencil;
                mask |= 0x2;
        }

        if (samplemask) {
                args[7] = samplemask;
                mask |= 0x4;
        }

        /* SI (except OLAND) has a bug that it only looks
         * at the X writemask component. */
        if (ctx->screen->b.chip_class == SI &&
            ctx->screen->b.family != CHIP_OLAND)
                mask |= 0x1;

        /* Specify which components to enable */
        args[0] = lp_build_const_int32(base->gallivm, mask);

        lp_build_intrinsic(base->gallivm->builder, "llvm.SI.export",
                           ctx->voidt, args, 9, 0);
}

static void si_export_mrt_color(struct lp_build_tgsi_context *bld_base,
                                LLVMValueRef *color, unsigned index,
                                unsigned samplemask_param,
                                bool is_last)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct lp_build_context *base = &bld_base->base;
        int i;

        /* Clamp color */
        if (ctx->shader->key.ps.epilog.clamp_color)
                for (i = 0; i < 4; i++)
                        color[i] = radeon_llvm_saturate(bld_base, color[i]);

        /* Alpha to one */
        if (ctx->shader->key.ps.epilog.alpha_to_one)
                color[3] = base->one;

        /* Alpha test */
        if (index == 0 &&
            ctx->shader->key.ps.epilog.alpha_func != PIPE_FUNC_ALWAYS)
                si_alpha_test(bld_base, color[3]);

        /* Line & polygon smoothing */
        if (ctx->shader->key.ps.epilog.poly_line_smoothing)
                color[3] = si_scale_alpha_by_sample_mask(bld_base, color[3],
                                                         samplemask_param);

        /* If last_cbuf > 0, FS_COLOR0_WRITES_ALL_CBUFS is true. */
        if (ctx->shader->key.ps.epilog.last_cbuf > 0) {
                LLVMValueRef args[8][9];
                int c, last = -1;

                /* Get the export arguments, also find out what the last one is. */
                for (c = 0; c <= ctx->shader->key.ps.epilog.last_cbuf; c++) {
                        si_llvm_init_export_args(bld_base, color,
                                                 V_008DFC_SQ_EXP_MRT + c, args[c]);
                        if (args[c][0] != bld_base->uint_bld.zero)
                                last = c;
                }

                /* Emit all exports. */
                for (c = 0; c <= ctx->shader->key.ps.epilog.last_cbuf; c++) {
                        if (is_last && last == c) {
                                args[c][1] = bld_base->uint_bld.one; /* whether the EXEC mask is valid */
                                args[c][2] = bld_base->uint_bld.one; /* DONE bit */
                        } else if (args[c][0] == bld_base->uint_bld.zero)
                                continue; /* unnecessary NULL export */

                        lp_build_intrinsic(base->gallivm->builder, "llvm.SI.export",
                                           ctx->voidt, args[c], 9, 0);
                }
        } else {
                LLVMValueRef args[9];

                /* Export */
                si_llvm_init_export_args(bld_base, color, V_008DFC_SQ_EXP_MRT + index,
                                         args);
                if (is_last) {
                        args[1] = bld_base->uint_bld.one; /* whether the EXEC mask is valid */
                        args[2] = bld_base->uint_bld.one; /* DONE bit */
                } else if (args[0] == bld_base->uint_bld.zero)
                        return; /* unnecessary NULL export */

                lp_build_intrinsic(base->gallivm->builder, "llvm.SI.export",
                                   ctx->voidt, args, 9, 0);
        }
}

static void si_export_null(struct lp_build_tgsi_context *bld_base)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct lp_build_context *base = &bld_base->base;
        struct lp_build_context *uint = &bld_base->uint_bld;
        LLVMValueRef args[9];

        args[0] = lp_build_const_int32(base->gallivm, 0x0); /* enabled channels */
        args[1] = uint->one; /* whether the EXEC mask is valid */
        args[2] = uint->one; /* DONE bit */
        args[3] = lp_build_const_int32(base->gallivm, V_008DFC_SQ_EXP_NULL);
        args[4] = uint->zero; /* COMPR flag (0 = 32-bit export) */
        args[5] = uint->undef; /* R */
        args[6] = uint->undef; /* G */
        args[7] = uint->undef; /* B */
        args[8] = uint->undef; /* A */

        lp_build_intrinsic(base->gallivm->builder, "llvm.SI.export",
                           ctx->voidt, args, 9, 0);
}

static void si_llvm_emit_fs_epilogue(struct lp_build_tgsi_context *bld_base)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct si_shader *shader = ctx->shader;
        struct lp_build_context *base = &bld_base->base;
        struct tgsi_shader_info *info = &shader->selector->info;
        LLVMBuilderRef builder = base->gallivm->builder;
        LLVMValueRef depth = NULL, stencil = NULL, samplemask = NULL;
        int last_color_export = -1;
        int i;

        /* Determine the last export. If MRTZ is present, it's always last.
         * Otherwise, find the last color export.
         */
        if (!info->writes_z && !info->writes_stencil && !info->writes_samplemask) {
                unsigned spi_format = shader->key.ps.epilog.spi_shader_col_format;

                /* Don't export NULL and return if alpha-test is enabled. */
                if (shader->key.ps.epilog.alpha_func != PIPE_FUNC_ALWAYS &&
                    shader->key.ps.epilog.alpha_func != PIPE_FUNC_NEVER &&
                    (spi_format & 0xf) == 0)
                        spi_format |= V_028714_SPI_SHADER_32_AR;

                for (i = 0; i < info->num_outputs; i++) {
                        unsigned index = info->output_semantic_index[i];

                        if (info->output_semantic_name[i] != TGSI_SEMANTIC_COLOR)
                                continue;

                        /* If last_cbuf > 0, FS_COLOR0_WRITES_ALL_CBUFS is true. */
                        if (shader->key.ps.epilog.last_cbuf > 0) {
                                /* Just set this if any of the colorbuffers are enabled. */
                                if (spi_format &
                                    ((1llu << (4 * (shader->key.ps.epilog.last_cbuf + 1))) - 1))
                                        last_color_export = i;
                                continue;
                        }

                        if ((spi_format >> (index * 4)) & 0xf)
                                last_color_export = i;
                }

                /* If there are no outputs, export NULL. */
                if (last_color_export == -1) {
                        si_export_null(bld_base);
                        return;
                }
        }

        for (i = 0; i < info->num_outputs; i++) {
                unsigned semantic_name = info->output_semantic_name[i];
                unsigned semantic_index = info->output_semantic_index[i];
                unsigned j;
                LLVMValueRef color[4] = {};

                /* Select the correct target */
                switch (semantic_name) {
                case TGSI_SEMANTIC_POSITION:
                        depth = LLVMBuildLoad(builder,
                                              ctx->radeon_bld.soa.outputs[i][2], "");
                        break;
                case TGSI_SEMANTIC_STENCIL:
                        stencil = LLVMBuildLoad(builder,
                                                ctx->radeon_bld.soa.outputs[i][1], "");
                        break;
                case TGSI_SEMANTIC_SAMPLEMASK:
                        samplemask = LLVMBuildLoad(builder,
                                                   ctx->radeon_bld.soa.outputs[i][0], "");
                        break;
                case TGSI_SEMANTIC_COLOR:
                        for (j = 0; j < 4; j++)
                                color[j] = LLVMBuildLoad(builder,
                                                         ctx->radeon_bld.soa.outputs[i][j], "");

                        si_export_mrt_color(bld_base, color, semantic_index,
                                            SI_PARAM_SAMPLE_COVERAGE,
                                            last_color_export == i);
                        break;
                default:
                        fprintf(stderr,
                                "Warning: SI unhandled fs output type:%d\n",
                                semantic_name);
                }
        }

        if (depth || stencil || samplemask)
                si_export_mrt_z(bld_base, depth, stencil, samplemask);
}

/**
 * Return PS outputs in this order:
 *
 * v[0:3] = color0.xyzw
 * v[4:7] = color1.xyzw
 * ...
 * vN+0 = Depth
 * vN+1 = Stencil
 * vN+2 = SampleMask
 * vN+3 = SampleMaskIn (used for OpenGL smoothing)
 *
 * The alpha-ref SGPR is returned via its original location.
 */
static void si_llvm_return_fs_outputs(struct lp_build_tgsi_context *bld_base)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct si_shader *shader = ctx->shader;
        struct lp_build_context *base = &bld_base->base;
        struct tgsi_shader_info *info = &shader->selector->info;
        LLVMBuilderRef builder = base->gallivm->builder;
        unsigned i, j, first_vgpr, vgpr;

        LLVMValueRef color[8][4] = {};
        LLVMValueRef depth = NULL, stencil = NULL, samplemask = NULL;
        LLVMValueRef ret;

        /* Read the output values. */
        for (i = 0; i < info->num_outputs; i++) {
                unsigned semantic_name = info->output_semantic_name[i];
                unsigned semantic_index = info->output_semantic_index[i];

                switch (semantic_name) {
                case TGSI_SEMANTIC_COLOR:
                        assert(semantic_index < 8);
                        for (j = 0; j < 4; j++) {
                                LLVMValueRef ptr = ctx->radeon_bld.soa.outputs[i][j];
                                LLVMValueRef result = LLVMBuildLoad(builder, ptr, "");
                                color[semantic_index][j] = result;
                        }
                        break;
                case TGSI_SEMANTIC_POSITION:
                        depth = LLVMBuildLoad(builder,
                                              ctx->radeon_bld.soa.outputs[i][2], "");
                        break;
                case TGSI_SEMANTIC_STENCIL:
                        stencil = LLVMBuildLoad(builder,
                                                ctx->radeon_bld.soa.outputs[i][1], "");
                        break;
                case TGSI_SEMANTIC_SAMPLEMASK:
                        samplemask = LLVMBuildLoad(builder,
                                                   ctx->radeon_bld.soa.outputs[i][0], "");
                        break;
                default:
                        fprintf(stderr, "Warning: SI unhandled fs output type:%d\n",
                                semantic_name);
                }
        }

        /* Fill the return structure. */
        ret = ctx->return_value;

        /* Set SGPRs. */
        ret = LLVMBuildInsertValue(builder, ret,
                                   bitcast(bld_base, TGSI_TYPE_SIGNED,
                                           LLVMGetParam(ctx->radeon_bld.main_fn,
                                                        SI_PARAM_ALPHA_REF)),
                                   SI_SGPR_ALPHA_REF, "");

        /* Set VGPRs */
        first_vgpr = vgpr = SI_SGPR_ALPHA_REF + 1;
        for (i = 0; i < ARRAY_SIZE(color); i++) {
                if (!color[i][0])
                        continue;

                for (j = 0; j < 4; j++)
                        ret = LLVMBuildInsertValue(builder, ret, color[i][j], vgpr++, "");
        }
        if (depth)
                ret = LLVMBuildInsertValue(builder, ret, depth, vgpr++, "");
        if (stencil)
                ret = LLVMBuildInsertValue(builder, ret, stencil, vgpr++, "");
        if (samplemask)
                ret = LLVMBuildInsertValue(builder, ret, samplemask, vgpr++, "");

        /* Add the input sample mask for smoothing at the end. */
        if (vgpr < first_vgpr + PS_EPILOG_SAMPLEMASK_MIN_LOC)
                vgpr = first_vgpr + PS_EPILOG_SAMPLEMASK_MIN_LOC;
        ret = LLVMBuildInsertValue(builder, ret,
                                   LLVMGetParam(ctx->radeon_bld.main_fn,
                                                SI_PARAM_SAMPLE_COVERAGE), vgpr++, "");

        ctx->return_value = ret;
}

/**
 * Given a v8i32 resource descriptor for a buffer, extract the size of the
 * buffer in number of elements and return it as an i32.
 */
static LLVMValueRef get_buffer_size(
        struct lp_build_tgsi_context *bld_base,
        LLVMValueRef descriptor)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        LLVMValueRef size =
                LLVMBuildExtractElement(builder, descriptor,
                                        lp_build_const_int32(gallivm, 6), "");

        if (ctx->screen->b.chip_class >= VI) {
                /* On VI, the descriptor contains the size in bytes,
                 * but TXQ must return the size in elements.
                 * The stride is always non-zero for resources using TXQ.
                 */
                LLVMValueRef stride =
                        LLVMBuildExtractElement(builder, descriptor,
                                                lp_build_const_int32(gallivm, 5), "");
                stride = LLVMBuildLShr(builder, stride,
                                       lp_build_const_int32(gallivm, 16), "");
                stride = LLVMBuildAnd(builder, stride,
                                      lp_build_const_int32(gallivm, 0x3FFF), "");

                size = LLVMBuildUDiv(builder, size, stride, "");
        }

        return size;
}

/**
 * Given the i32 or vNi32 \p type, generate the textual name (e.g. for use with
 * intrinsic names).
 */
static void build_int_type_name(
        LLVMTypeRef type,
        char *buf, unsigned bufsize)
{
        assert(bufsize >= 6);

        if (LLVMGetTypeKind(type) == LLVMVectorTypeKind)
                snprintf(buf, bufsize, "v%ui32",
                         LLVMGetVectorSize(type));
        else
                strcpy(buf, "i32");
}

static void build_tex_intrinsic(const struct lp_build_tgsi_action *action,
                                struct lp_build_tgsi_context *bld_base,
                                struct lp_build_emit_data *emit_data);

/* Prevent optimizations (at least of memory accesses) across the current
 * point in the program by emitting empty inline assembly that is marked as
 * having side effects.
 */
static void emit_optimization_barrier(struct si_shader_context *ctx)
{
        LLVMBuilderRef builder = ctx->radeon_bld.gallivm.builder;
        LLVMTypeRef ftype = LLVMFunctionType(ctx->voidt, NULL, 0, false);
        LLVMValueRef inlineasm = LLVMConstInlineAsm(ftype, "", "", true, false);
        LLVMBuildCall(builder, inlineasm, NULL, 0, "");
}

static void emit_waitcnt(struct si_shader_context *ctx)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        LLVMValueRef args[1] = {
                lp_build_const_int32(gallivm, 0xf70)
        };
        lp_build_intrinsic(builder, "llvm.amdgcn.s.waitcnt",
                           ctx->voidt, args, 1, LLVMNoUnwindAttribute);
}

static void membar_emit(
                const struct lp_build_tgsi_action *action,
                struct lp_build_tgsi_context *bld_base,
                struct lp_build_emit_data *emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);

        emit_waitcnt(ctx);
}

static LLVMValueRef
shader_buffer_fetch_rsrc(struct si_shader_context *ctx,
                         const struct tgsi_full_src_register *reg)
{
        LLVMValueRef ind_index;
        LLVMValueRef rsrc_ptr;

        if (!reg->Register.Indirect)
                return ctx->shader_buffers[reg->Register.Index];

        ind_index = get_bounded_indirect_index(ctx, &reg->Indirect,
                                               reg->Register.Index,
                                               SI_NUM_SHADER_BUFFERS);

        rsrc_ptr = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_SHADER_BUFFERS);
        return build_indexed_load_const(ctx, rsrc_ptr, ind_index);
}

static bool tgsi_is_array_sampler(unsigned target)
{
        return target == TGSI_TEXTURE_1D_ARRAY ||
               target == TGSI_TEXTURE_SHADOW1D_ARRAY ||
               target == TGSI_TEXTURE_2D_ARRAY ||
               target == TGSI_TEXTURE_SHADOW2D_ARRAY ||
               target == TGSI_TEXTURE_CUBE_ARRAY ||
               target == TGSI_TEXTURE_SHADOWCUBE_ARRAY ||
               target == TGSI_TEXTURE_2D_ARRAY_MSAA;
}

static bool tgsi_is_array_image(unsigned target)
{
        return target == TGSI_TEXTURE_3D ||
               target == TGSI_TEXTURE_CUBE ||
               target == TGSI_TEXTURE_1D_ARRAY ||
               target == TGSI_TEXTURE_2D_ARRAY ||
               target == TGSI_TEXTURE_CUBE_ARRAY ||
               target == TGSI_TEXTURE_2D_ARRAY_MSAA;
}

/**
 * Given a 256-bit resource descriptor, force the DCC enable bit to off.
 *
 * At least on Tonga, executing image stores on images with DCC enabled and
 * non-trivial can eventually lead to lockups. This can occur when an
 * application binds an image as read-only but then uses a shader that writes
 * to it. The OpenGL spec allows almost arbitrarily bad behavior (including
 * program termination) in this case, but it doesn't cost much to be a bit
 * nicer: disabling DCC in the shader still leads to undefined results but
 * avoids the lockup.
 */
static LLVMValueRef force_dcc_off(struct si_shader_context *ctx,
                                  LLVMValueRef rsrc)
{
        if (ctx->screen->b.chip_class <= CIK) {
                return rsrc;
        } else {
                LLVMBuilderRef builder = ctx->radeon_bld.gallivm.builder;
                LLVMValueRef i32_6 = LLVMConstInt(ctx->i32, 6, 0);
                LLVMValueRef i32_C = LLVMConstInt(ctx->i32, C_008F28_COMPRESSION_EN, 0);
                LLVMValueRef tmp;

                tmp = LLVMBuildExtractElement(builder, rsrc, i32_6, "");
                tmp = LLVMBuildAnd(builder, tmp, i32_C, "");
                return LLVMBuildInsertElement(builder, rsrc, tmp, i32_6, "");
        }
}

/**
 * Load the resource descriptor for \p image.
 */
static void
image_fetch_rsrc(
        struct lp_build_tgsi_context *bld_base,
        const struct tgsi_full_src_register *image,
        bool dcc_off,
        LLVMValueRef *rsrc)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);

        assert(image->Register.File == TGSI_FILE_IMAGE);

        if (!image->Register.Indirect) {
                /* Fast path: use preloaded resources */
                *rsrc = ctx->images[image->Register.Index];
        } else {
                /* Indexing and manual load */
                LLVMValueRef ind_index;
                LLVMValueRef rsrc_ptr;
                LLVMValueRef tmp;

                /* From the GL_ARB_shader_image_load_store extension spec:
                 *
                 *    If a shader performs an image load, store, or atomic
                 *    operation using an image variable declared as an array,
                 *    and if the index used to select an individual element is
                 *    negative or greater than or equal to the size of the
                 *    array, the results of the operation are undefined but may
                 *    not lead to termination.
                 */
                ind_index = get_bounded_indirect_index(ctx, &image->Indirect,
                                                       image->Register.Index,
                                                       SI_NUM_IMAGES);

                rsrc_ptr = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_IMAGES);
                tmp = build_indexed_load_const(ctx, rsrc_ptr, ind_index);
                if (dcc_off)
                        tmp = force_dcc_off(ctx, tmp);
                *rsrc = tmp;
        }
}

static LLVMValueRef image_fetch_coords(
                struct lp_build_tgsi_context *bld_base,
                const struct tgsi_full_instruction *inst,
                unsigned src)
{
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        unsigned target = inst->Memory.Texture;
        unsigned num_coords = tgsi_util_get_texture_coord_dim(target);
        LLVMValueRef coords[4];
        LLVMValueRef tmp;
        int chan;

        for (chan = 0; chan < num_coords; ++chan) {
                tmp = lp_build_emit_fetch(bld_base, inst, src, chan);
                tmp = LLVMBuildBitCast(builder, tmp, bld_base->uint_bld.elem_type, "");
                coords[chan] = tmp;
        }

        if (num_coords == 1)
                return coords[0];

        if (num_coords == 3) {
                /* LLVM has difficulties lowering 3-element vectors. */
                coords[3] = bld_base->uint_bld.undef;
                num_coords = 4;
        }

        return lp_build_gather_values(gallivm, coords, num_coords);
}

/**
 * Append the extra mode bits that are used by image load and store.
 */
static void image_append_args(
                struct si_shader_context *ctx,
                struct lp_build_emit_data * emit_data,
                unsigned target,
                bool atomic)
{
        const struct tgsi_full_instruction *inst = emit_data->inst;
        LLVMValueRef i1false = LLVMConstInt(ctx->i1, 0, 0);
        LLVMValueRef i1true = LLVMConstInt(ctx->i1, 1, 0);

        emit_data->args[emit_data->arg_count++] = i1false; /* r128 */
        emit_data->args[emit_data->arg_count++] =
                tgsi_is_array_image(target) ? i1true : i1false; /* da */
        if (!atomic) {
                emit_data->args[emit_data->arg_count++] =
                        inst->Memory.Qualifier & (TGSI_MEMORY_COHERENT | TGSI_MEMORY_VOLATILE) ?
                        i1true : i1false; /* glc */
        }
        emit_data->args[emit_data->arg_count++] = i1false; /* slc */
}

/**
 * Given a 256 bit resource, extract the top half (which stores the buffer
 * resource in the case of textures and images).
 */
static LLVMValueRef extract_rsrc_top_half(
                struct si_shader_context *ctx,
                LLVMValueRef rsrc)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        struct lp_build_tgsi_context *bld_base = &ctx->radeon_bld.soa.bld_base;
        LLVMTypeRef v2i128 = LLVMVectorType(ctx->i128, 2);

        rsrc = LLVMBuildBitCast(gallivm->builder, rsrc, v2i128, "");
        rsrc = LLVMBuildExtractElement(gallivm->builder, rsrc, bld_base->uint_bld.one, "");
        rsrc = LLVMBuildBitCast(gallivm->builder, rsrc, ctx->v4i32, "");

        return rsrc;
}

/**
 * Append the resource and indexing arguments for buffer intrinsics.
 *
 * \param rsrc the v4i32 buffer resource
 * \param index index into the buffer (stride-based)
 * \param offset byte offset into the buffer
 */
static void buffer_append_args(
                struct si_shader_context *ctx,
                struct lp_build_emit_data *emit_data,
                LLVMValueRef rsrc,
                LLVMValueRef index,
                LLVMValueRef offset,
                bool atomic)
{
        const struct tgsi_full_instruction *inst = emit_data->inst;
        LLVMValueRef i1false = LLVMConstInt(ctx->i1, 0, 0);
        LLVMValueRef i1true = LLVMConstInt(ctx->i1, 1, 0);

        emit_data->args[emit_data->arg_count++] = rsrc;
        emit_data->args[emit_data->arg_count++] = index; /* vindex */
        emit_data->args[emit_data->arg_count++] = offset; /* voffset */
        if (!atomic) {
                emit_data->args[emit_data->arg_count++] =
                        inst->Memory.Qualifier & (TGSI_MEMORY_COHERENT | TGSI_MEMORY_VOLATILE) ?
                        i1true : i1false; /* glc */
        }
        emit_data->args[emit_data->arg_count++] = i1false; /* slc */
}

static void load_fetch_args(
                struct lp_build_tgsi_context * bld_base,
                struct lp_build_emit_data * emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        const struct tgsi_full_instruction * inst = emit_data->inst;
        unsigned target = inst->Memory.Texture;
        LLVMValueRef rsrc;

        emit_data->dst_type = LLVMVectorType(bld_base->base.elem_type, 4);

        if (inst->Src[0].Register.File == TGSI_FILE_BUFFER) {
                LLVMBuilderRef builder = gallivm->builder;
                LLVMValueRef offset;
                LLVMValueRef tmp;

                rsrc = shader_buffer_fetch_rsrc(ctx, &inst->Src[0]);

                tmp = lp_build_emit_fetch(bld_base, inst, 1, 0);
                offset = LLVMBuildBitCast(builder, tmp, bld_base->uint_bld.elem_type, "");

                buffer_append_args(ctx, emit_data, rsrc, bld_base->uint_bld.zero,
                                   offset, false);
        } else if (inst->Src[0].Register.File == TGSI_FILE_IMAGE) {
                LLVMValueRef coords;

                image_fetch_rsrc(bld_base, &inst->Src[0], false, &rsrc);
                coords = image_fetch_coords(bld_base, inst, 1);

                if (target == TGSI_TEXTURE_BUFFER) {
                        rsrc = extract_rsrc_top_half(ctx, rsrc);
                        buffer_append_args(ctx, emit_data, rsrc, coords,
                                        bld_base->uint_bld.zero, false);
                } else {
                        emit_data->args[0] = coords;
                        emit_data->args[1] = rsrc;
                        emit_data->args[2] = lp_build_const_int32(gallivm, 15); /* dmask */
                        emit_data->arg_count = 3;

                        image_append_args(ctx, emit_data, target, false);
                }
        }
}

static void load_emit_buffer(struct si_shader_context *ctx,
                             struct lp_build_emit_data *emit_data)
{
        const struct tgsi_full_instruction *inst = emit_data->inst;
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        uint writemask = inst->Dst[0].Register.WriteMask;
        uint count = util_last_bit(writemask);
        const char *intrinsic_name;
        LLVMTypeRef dst_type;

        switch (count) {
        case 1:
                intrinsic_name = "llvm.amdgcn.buffer.load.f32";
                dst_type = ctx->f32;
                break;
        case 2:
                intrinsic_name = "llvm.amdgcn.buffer.load.v2f32";
                dst_type = LLVMVectorType(ctx->f32, 2);
                break;
        default: // 3 & 4
                intrinsic_name = "llvm.amdgcn.buffer.load.v4f32";
                dst_type = ctx->v4f32;
                count = 4;
        }

        emit_data->output[emit_data->chan] = lp_build_intrinsic(
                        builder, intrinsic_name, dst_type,
                        emit_data->args, emit_data->arg_count,
                        LLVMReadOnlyAttribute | LLVMNoUnwindAttribute);
}

static LLVMValueRef get_memory_ptr(struct si_shader_context *ctx,
                                   const struct tgsi_full_instruction *inst,
                                   LLVMTypeRef type, int arg)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        LLVMValueRef offset, ptr;
        int addr_space;

        offset = lp_build_emit_fetch(&ctx->radeon_bld.soa.bld_base, inst, arg, 0);
        offset = LLVMBuildBitCast(builder, offset, ctx->i32, "");

        ptr = ctx->shared_memory;
        ptr = LLVMBuildGEP(builder, ptr, &offset, 1, "");
        addr_space = LLVMGetPointerAddressSpace(LLVMTypeOf(ptr));
        ptr = LLVMBuildBitCast(builder, ptr, LLVMPointerType(type, addr_space), "");

        return ptr;
}

static void load_emit_memory(
                struct si_shader_context *ctx,
                struct lp_build_emit_data *emit_data)
{
        const struct tgsi_full_instruction *inst = emit_data->inst;
        struct lp_build_context *base = &ctx->radeon_bld.soa.bld_base.base;
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        unsigned writemask = inst->Dst[0].Register.WriteMask;
        LLVMValueRef channels[4], ptr, derived_ptr, index;
        int chan;

        ptr = get_memory_ptr(ctx, inst, base->elem_type, 1);

        for (chan = 0; chan < 4; ++chan) {
                if (!(writemask & (1 << chan))) {
                        channels[chan] = LLVMGetUndef(base->elem_type);
                        continue;
                }

                index = lp_build_const_int32(gallivm, chan);
                derived_ptr = LLVMBuildGEP(builder, ptr, &index, 1, "");
                channels[chan] = LLVMBuildLoad(builder, derived_ptr, "");
        }
        emit_data->output[emit_data->chan] = lp_build_gather_values(gallivm, channels, 4);
}

static void load_emit(
                const struct lp_build_tgsi_action *action,
                struct lp_build_tgsi_context *bld_base,
                struct lp_build_emit_data *emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        const struct tgsi_full_instruction * inst = emit_data->inst;
        char intrinsic_name[32];
        char coords_type[8];

        if (inst->Src[0].Register.File == TGSI_FILE_MEMORY) {
                load_emit_memory(ctx, emit_data);
                return;
        }

        if (inst->Memory.Qualifier & TGSI_MEMORY_VOLATILE)
                emit_waitcnt(ctx);

        if (inst->Src[0].Register.File == TGSI_FILE_BUFFER) {
                load_emit_buffer(ctx, emit_data);
                return;
        }

        if (inst->Memory.Texture == TGSI_TEXTURE_BUFFER) {
                emit_data->output[emit_data->chan] =
                        lp_build_intrinsic(
                                builder, "llvm.amdgcn.buffer.load.format.v4f32", emit_data->dst_type,
                                emit_data->args, emit_data->arg_count,
                                LLVMReadOnlyAttribute | LLVMNoUnwindAttribute);
        } else {
                build_int_type_name(LLVMTypeOf(emit_data->args[0]),
                                    coords_type, sizeof(coords_type));

                snprintf(intrinsic_name, sizeof(intrinsic_name),
                         "llvm.amdgcn.image.load.%s", coords_type);

                emit_data->output[emit_data->chan] =
                        lp_build_intrinsic(
                                builder, intrinsic_name, emit_data->dst_type,
                                emit_data->args, emit_data->arg_count,
                                LLVMReadOnlyAttribute | LLVMNoUnwindAttribute);
        }
}

static void store_fetch_args(
                struct lp_build_tgsi_context * bld_base,
                struct lp_build_emit_data * emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        const struct tgsi_full_instruction * inst = emit_data->inst;
        struct tgsi_full_src_register memory;
        LLVMValueRef chans[4];
        LLVMValueRef data;
        LLVMValueRef rsrc;
        unsigned chan;

        emit_data->dst_type = LLVMVoidTypeInContext(gallivm->context);

        for (chan = 0; chan < 4; ++chan) {
                chans[chan] = lp_build_emit_fetch(bld_base, inst, 1, chan);
        }
        data = lp_build_gather_values(gallivm, chans, 4);

        emit_data->args[emit_data->arg_count++] = data;

        memory = tgsi_full_src_register_from_dst(&inst->Dst[0]);

        if (inst->Dst[0].Register.File == TGSI_FILE_BUFFER) {
                LLVMValueRef offset;
                LLVMValueRef tmp;

                rsrc = shader_buffer_fetch_rsrc(ctx, &memory);

                tmp = lp_build_emit_fetch(bld_base, inst, 0, 0);
                offset = LLVMBuildBitCast(builder, tmp, bld_base->uint_bld.elem_type, "");

                buffer_append_args(ctx, emit_data, rsrc, bld_base->uint_bld.zero,
                                   offset, false);
        } else if (inst->Dst[0].Register.File == TGSI_FILE_IMAGE) {
                unsigned target = inst->Memory.Texture;
                LLVMValueRef coords;

                coords = image_fetch_coords(bld_base, inst, 0);

                if (target == TGSI_TEXTURE_BUFFER) {
                        image_fetch_rsrc(bld_base, &memory, false, &rsrc);

                        rsrc = extract_rsrc_top_half(ctx, rsrc);
                        buffer_append_args(ctx, emit_data, rsrc, coords,
                                        bld_base->uint_bld.zero, false);
                } else {
                        emit_data->args[1] = coords;
                        image_fetch_rsrc(bld_base, &memory, true, &emit_data->args[2]);
                        emit_data->args[3] = lp_build_const_int32(gallivm, 15); /* dmask */
                        emit_data->arg_count = 4;

                        image_append_args(ctx, emit_data, target, false);
                }
        }
}

static void store_emit_buffer(
                struct si_shader_context *ctx,
                struct lp_build_emit_data *emit_data)
{
        const struct tgsi_full_instruction *inst = emit_data->inst;
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        struct lp_build_context *uint_bld = &ctx->radeon_bld.soa.bld_base.uint_bld;
        LLVMValueRef base_data = emit_data->args[0];
        LLVMValueRef base_offset = emit_data->args[3];
        unsigned writemask = inst->Dst[0].Register.WriteMask;

        while (writemask) {
                int start, count;
                const char *intrinsic_name;
                LLVMValueRef data;
                LLVMValueRef offset;
                LLVMValueRef tmp;

                u_bit_scan_consecutive_range(&writemask, &start, &count);

                /* Due to an LLVM limitation, split 3-element writes
                 * into a 2-element and a 1-element write. */
                if (count == 3) {
                        writemask |= 1 << (start + 2);
                        count = 2;
                }

                if (count == 4) {
                        data = base_data;
                        intrinsic_name = "llvm.amdgcn.buffer.store.v4f32";
                } else if (count == 2) {
                        LLVMTypeRef v2f32 = LLVMVectorType(ctx->f32, 2);

                        tmp = LLVMBuildExtractElement(
                                builder, base_data,
                                lp_build_const_int32(gallivm, start), "");
                        data = LLVMBuildInsertElement(
                                builder, LLVMGetUndef(v2f32), tmp,
                                uint_bld->zero, "");

                        tmp = LLVMBuildExtractElement(
                                builder, base_data,
                                lp_build_const_int32(gallivm, start + 1), "");
                        data = LLVMBuildInsertElement(
                                builder, data, tmp, uint_bld->one, "");

                        intrinsic_name = "llvm.amdgcn.buffer.store.v2f32";
                } else {
                        assert(count == 1);
                        data = LLVMBuildExtractElement(
                                builder, base_data,
                                lp_build_const_int32(gallivm, start), "");
                        intrinsic_name = "llvm.amdgcn.buffer.store.f32";
                }

                offset = base_offset;
                if (start != 0) {
                        offset = LLVMBuildAdd(
                                builder, offset,
                                lp_build_const_int32(gallivm, start * 4), "");
                }

                emit_data->args[0] = data;
                emit_data->args[3] = offset;

                lp_build_intrinsic(
                        builder, intrinsic_name, emit_data->dst_type,
                        emit_data->args, emit_data->arg_count,
                        LLVMNoUnwindAttribute);
        }
}

static void store_emit_memory(
                struct si_shader_context *ctx,
                struct lp_build_emit_data *emit_data)
{
        const struct tgsi_full_instruction *inst = emit_data->inst;
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        struct lp_build_context *base = &ctx->radeon_bld.soa.bld_base.base;
        LLVMBuilderRef builder = gallivm->builder;
        unsigned writemask = inst->Dst[0].Register.WriteMask;
        LLVMValueRef ptr, derived_ptr, data, index;
        int chan;

        ptr = get_memory_ptr(ctx, inst, base->elem_type, 0);

        for (chan = 0; chan < 4; ++chan) {
                if (!(writemask & (1 << chan))) {
                        continue;
                }
                data = lp_build_emit_fetch(&ctx->radeon_bld.soa.bld_base, inst, 1, chan);
                index = lp_build_const_int32(gallivm, chan);
                derived_ptr = LLVMBuildGEP(builder, ptr, &index, 1, "");
                LLVMBuildStore(builder, data, derived_ptr);
        }
}

static void store_emit(
                const struct lp_build_tgsi_action *action,
                struct lp_build_tgsi_context *bld_base,
                struct lp_build_emit_data *emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        const struct tgsi_full_instruction * inst = emit_data->inst;
        unsigned target = inst->Memory.Texture;
        char intrinsic_name[32];
        char coords_type[8];

        if (inst->Dst[0].Register.File == TGSI_FILE_MEMORY) {
                store_emit_memory(ctx, emit_data);
                return;
        }

        if (inst->Memory.Qualifier & TGSI_MEMORY_VOLATILE)
                emit_waitcnt(ctx);

        if (inst->Dst[0].Register.File == TGSI_FILE_BUFFER) {
                store_emit_buffer(ctx, emit_data);
                return;
        }

        if (target == TGSI_TEXTURE_BUFFER) {
                emit_data->output[emit_data->chan] = lp_build_intrinsic(
                        builder, "llvm.amdgcn.buffer.store.format.v4f32",
                        emit_data->dst_type, emit_data->args, emit_data->arg_count,
                        LLVMNoUnwindAttribute);
        } else {
                build_int_type_name(LLVMTypeOf(emit_data->args[1]),
                                    coords_type, sizeof(coords_type));
                snprintf(intrinsic_name, sizeof(intrinsic_name),
                         "llvm.amdgcn.image.store.%s", coords_type);

                emit_data->output[emit_data->chan] =
                        lp_build_intrinsic(
                                builder, intrinsic_name, emit_data->dst_type,
                                emit_data->args, emit_data->arg_count,
                                LLVMNoUnwindAttribute);
        }
}

static void atomic_fetch_args(
                struct lp_build_tgsi_context * bld_base,
                struct lp_build_emit_data * emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        const struct tgsi_full_instruction * inst = emit_data->inst;
        LLVMValueRef data1, data2;
        LLVMValueRef rsrc;
        LLVMValueRef tmp;

        emit_data->dst_type = bld_base->base.elem_type;

        tmp = lp_build_emit_fetch(bld_base, inst, 2, 0);
        data1 = LLVMBuildBitCast(builder, tmp, bld_base->uint_bld.elem_type, "");

        if (inst->Instruction.Opcode == TGSI_OPCODE_ATOMCAS) {
                tmp = lp_build_emit_fetch(bld_base, inst, 3, 0);
                data2 = LLVMBuildBitCast(builder, tmp, bld_base->uint_bld.elem_type, "");
        }

        /* llvm.amdgcn.image/buffer.atomic.cmpswap reflect the hardware order
         * of arguments, which is reversed relative to TGSI (and GLSL)
         */
        if (inst->Instruction.Opcode == TGSI_OPCODE_ATOMCAS)
                emit_data->args[emit_data->arg_count++] = data2;
        emit_data->args[emit_data->arg_count++] = data1;

        if (inst->Src[0].Register.File == TGSI_FILE_BUFFER) {
                LLVMValueRef offset;

                rsrc = shader_buffer_fetch_rsrc(ctx, &inst->Src[0]);

                tmp = lp_build_emit_fetch(bld_base, inst, 1, 0);
                offset = LLVMBuildBitCast(builder, tmp, bld_base->uint_bld.elem_type, "");

                buffer_append_args(ctx, emit_data, rsrc, bld_base->uint_bld.zero,
                                   offset, true);
        } else if (inst->Src[0].Register.File == TGSI_FILE_IMAGE) {
                unsigned target = inst->Memory.Texture;
                LLVMValueRef coords;

                image_fetch_rsrc(bld_base, &inst->Src[0],
                                 target != TGSI_TEXTURE_BUFFER, &rsrc);
                coords = image_fetch_coords(bld_base, inst, 1);

                if (target == TGSI_TEXTURE_BUFFER) {
                        rsrc = extract_rsrc_top_half(ctx, rsrc);
                        buffer_append_args(ctx, emit_data, rsrc, coords,
                                           bld_base->uint_bld.zero, true);
                } else {
                        emit_data->args[emit_data->arg_count++] = coords;
                        emit_data->args[emit_data->arg_count++] = rsrc;

                        image_append_args(ctx, emit_data, target, true);
                }
        }
}

static void atomic_emit_memory(struct si_shader_context *ctx,
                               struct lp_build_emit_data *emit_data) {
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        const struct tgsi_full_instruction * inst = emit_data->inst;
        LLVMValueRef ptr, result, arg;

        ptr = get_memory_ptr(ctx, inst, ctx->i32, 1);

        arg = lp_build_emit_fetch(&ctx->radeon_bld.soa.bld_base, inst, 2, 0);
        arg = LLVMBuildBitCast(builder, arg, ctx->i32, "");

        if (inst->Instruction.Opcode == TGSI_OPCODE_ATOMCAS) {
                LLVMValueRef new_data;
                new_data = lp_build_emit_fetch(&ctx->radeon_bld.soa.bld_base,
                                               inst, 3, 0);

                new_data = LLVMBuildBitCast(builder, new_data, ctx->i32, "");

#if HAVE_LLVM >= 0x309
                result = LLVMBuildAtomicCmpXchg(builder, ptr, arg, new_data,
                                       LLVMAtomicOrderingSequentiallyConsistent,
                                       LLVMAtomicOrderingSequentiallyConsistent,
                                       false);
#endif

                result = LLVMBuildExtractValue(builder, result, 0, "");
        } else {
                LLVMAtomicRMWBinOp op;

                switch(inst->Instruction.Opcode) {
                        case TGSI_OPCODE_ATOMUADD:
                                op = LLVMAtomicRMWBinOpAdd;
                                break;
                        case TGSI_OPCODE_ATOMXCHG:
                                op = LLVMAtomicRMWBinOpXchg;
                                break;
                        case TGSI_OPCODE_ATOMAND:
                                op = LLVMAtomicRMWBinOpAnd;
                                break;
                        case TGSI_OPCODE_ATOMOR:
                                op = LLVMAtomicRMWBinOpOr;
                                break;
                        case TGSI_OPCODE_ATOMXOR:
                                op = LLVMAtomicRMWBinOpXor;
                                break;
                        case TGSI_OPCODE_ATOMUMIN:
                                op = LLVMAtomicRMWBinOpUMin;
                                break;
                        case TGSI_OPCODE_ATOMUMAX:
                                op = LLVMAtomicRMWBinOpUMax;
                                break;
                        case TGSI_OPCODE_ATOMIMIN:
                                op = LLVMAtomicRMWBinOpMin;
                                break;
                        case TGSI_OPCODE_ATOMIMAX:
                                op = LLVMAtomicRMWBinOpMax;
                                break;
                        default:
                                unreachable("unknown atomic opcode");
                }

                result = LLVMBuildAtomicRMW(builder, op, ptr, arg,
                                       LLVMAtomicOrderingSequentiallyConsistent,
                                       false);
        }
        emit_data->output[emit_data->chan] = LLVMBuildBitCast(builder, result, emit_data->dst_type, "");
}

static void atomic_emit(
                const struct lp_build_tgsi_action *action,
                struct lp_build_tgsi_context *bld_base,
                struct lp_build_emit_data *emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        const struct tgsi_full_instruction * inst = emit_data->inst;
        char intrinsic_name[40];
        LLVMValueRef tmp;

        if (inst->Src[0].Register.File == TGSI_FILE_MEMORY) {
                atomic_emit_memory(ctx, emit_data);
                return;
        }

        if (inst->Src[0].Register.File == TGSI_FILE_BUFFER ||
            inst->Memory.Texture == TGSI_TEXTURE_BUFFER) {
                snprintf(intrinsic_name, sizeof(intrinsic_name),
                         "llvm.amdgcn.buffer.atomic.%s", action->intr_name);
        } else {
                char coords_type[8];

                build_int_type_name(LLVMTypeOf(emit_data->args[1]),
                                    coords_type, sizeof(coords_type));
                snprintf(intrinsic_name, sizeof(intrinsic_name),
                         "llvm.amdgcn.image.atomic.%s.%s",
                         action->intr_name, coords_type);
        }

        tmp = lp_build_intrinsic(
                builder, intrinsic_name, bld_base->uint_bld.elem_type,
                emit_data->args, emit_data->arg_count,
                LLVMNoUnwindAttribute);
        emit_data->output[emit_data->chan] =
                LLVMBuildBitCast(builder, tmp, bld_base->base.elem_type, "");
}

static void resq_fetch_args(
                struct lp_build_tgsi_context * bld_base,
                struct lp_build_emit_data * emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        const struct tgsi_full_instruction *inst = emit_data->inst;
        const struct tgsi_full_src_register *reg = &inst->Src[0];

        emit_data->dst_type = LLVMVectorType(bld_base->base.elem_type, 4);

        if (reg->Register.File == TGSI_FILE_BUFFER) {
                emit_data->args[0] = shader_buffer_fetch_rsrc(ctx, reg);
                emit_data->arg_count = 1;
        } else if (inst->Memory.Texture == TGSI_TEXTURE_BUFFER) {
                image_fetch_rsrc(bld_base, reg, false, &emit_data->args[0]);
                emit_data->arg_count = 1;
        } else {
                emit_data->args[0] = bld_base->uint_bld.zero; /* mip level */
                image_fetch_rsrc(bld_base, reg, false, &emit_data->args[1]);
                emit_data->args[2] = lp_build_const_int32(gallivm, 15); /* dmask */
                emit_data->args[3] = bld_base->uint_bld.zero; /* unorm */
                emit_data->args[4] = bld_base->uint_bld.zero; /* r128 */
                emit_data->args[5] = tgsi_is_array_image(inst->Memory.Texture) ?
                        bld_base->uint_bld.one : bld_base->uint_bld.zero; /* da */
                emit_data->args[6] = bld_base->uint_bld.zero; /* glc */
                emit_data->args[7] = bld_base->uint_bld.zero; /* slc */
                emit_data->args[8] = bld_base->uint_bld.zero; /* tfe */
                emit_data->args[9] = bld_base->uint_bld.zero; /* lwe */
                emit_data->arg_count = 10;
        }
}

static void resq_emit(
                const struct lp_build_tgsi_action *action,
                struct lp_build_tgsi_context *bld_base,
                struct lp_build_emit_data *emit_data)
{
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        const struct tgsi_full_instruction *inst = emit_data->inst;
        LLVMValueRef out;

        if (inst->Src[0].Register.File == TGSI_FILE_BUFFER) {
                out = LLVMBuildExtractElement(builder, emit_data->args[0],
                                              lp_build_const_int32(gallivm, 2), "");
        } else if (inst->Memory.Texture == TGSI_TEXTURE_BUFFER) {
                out = get_buffer_size(bld_base, emit_data->args[0]);
        } else {
                out = lp_build_intrinsic(
                        builder, "llvm.SI.getresinfo.i32", emit_data->dst_type,
                        emit_data->args, emit_data->arg_count,
                        LLVMReadNoneAttribute | LLVMNoUnwindAttribute);

                /* Divide the number of layers by 6 to get the number of cubes. */
                if (inst->Memory.Texture == TGSI_TEXTURE_CUBE_ARRAY) {
                        LLVMValueRef imm2 = lp_build_const_int32(gallivm, 2);
                        LLVMValueRef imm6 = lp_build_const_int32(gallivm, 6);

                        LLVMValueRef z = LLVMBuildExtractElement(builder, out, imm2, "");
                        z = LLVMBuildBitCast(builder, z, bld_base->uint_bld.elem_type, "");
                        z = LLVMBuildSDiv(builder, z, imm6, "");
                        z = LLVMBuildBitCast(builder, z, bld_base->base.elem_type, "");
                        out = LLVMBuildInsertElement(builder, out, z, imm2, "");
                }
        }

        emit_data->output[emit_data->chan] = out;
}

static void set_tex_fetch_args(struct si_shader_context *ctx,
                               struct lp_build_emit_data *emit_data,
                               unsigned opcode, unsigned target,
                               LLVMValueRef res_ptr, LLVMValueRef samp_ptr,
                               LLVMValueRef *param, unsigned count,
                               unsigned dmask)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        unsigned num_args;
        unsigned is_rect = target == TGSI_TEXTURE_RECT;

        /* Pad to power of two vector */
        while (count < util_next_power_of_two(count))
                param[count++] = LLVMGetUndef(ctx->i32);

        /* Texture coordinates. */
        if (count > 1)
                emit_data->args[0] = lp_build_gather_values(gallivm, param, count);
        else
                emit_data->args[0] = param[0];

        /* Resource. */
        emit_data->args[1] = res_ptr;
        num_args = 2;

        if (opcode == TGSI_OPCODE_TXF || opcode == TGSI_OPCODE_TXQ)
                emit_data->dst_type = ctx->v4i32;
        else {
                emit_data->dst_type = ctx->v4f32;

                emit_data->args[num_args++] = samp_ptr;
        }

        emit_data->args[num_args++] = lp_build_const_int32(gallivm, dmask);
        emit_data->args[num_args++] = lp_build_const_int32(gallivm, is_rect); /* unorm */
        emit_data->args[num_args++] = lp_build_const_int32(gallivm, 0); /* r128 */
        emit_data->args[num_args++] = lp_build_const_int32(gallivm,
                                        tgsi_is_array_sampler(target)); /* da */
        emit_data->args[num_args++] = lp_build_const_int32(gallivm, 0); /* glc */
        emit_data->args[num_args++] = lp_build_const_int32(gallivm, 0); /* slc */
        emit_data->args[num_args++] = lp_build_const_int32(gallivm, 0); /* tfe */
        emit_data->args[num_args++] = lp_build_const_int32(gallivm, 0); /* lwe */

        emit_data->arg_count = num_args;
}

static const struct lp_build_tgsi_action tex_action;

enum desc_type {
        DESC_IMAGE,
        DESC_FMASK,
        DESC_SAMPLER
};

static LLVMTypeRef const_array(LLVMTypeRef elem_type, int num_elements)
{
        return LLVMPointerType(LLVMArrayType(elem_type, num_elements),
                               CONST_ADDR_SPACE);
}

/**
 * Load an image view, fmask view. or sampler state descriptor.
 */
static LLVMValueRef get_sampler_desc_custom(struct si_shader_context *ctx,
                                            LLVMValueRef list, LLVMValueRef index,
                                            enum desc_type type)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMBuilderRef builder = gallivm->builder;

        switch (type) {
        case DESC_IMAGE:
                /* The image is at [0:7]. */
                index = LLVMBuildMul(builder, index, LLVMConstInt(ctx->i32, 2, 0), "");
                break;
        case DESC_FMASK:
                /* The FMASK is at [8:15]. */
                index = LLVMBuildMul(builder, index, LLVMConstInt(ctx->i32, 2, 0), "");
                index = LLVMBuildAdd(builder, index, LLVMConstInt(ctx->i32, 1, 0), "");
                break;
        case DESC_SAMPLER:
                /* The sampler state is at [12:15]. */
                index = LLVMBuildMul(builder, index, LLVMConstInt(ctx->i32, 4, 0), "");
                index = LLVMBuildAdd(builder, index, LLVMConstInt(ctx->i32, 3, 0), "");
                list = LLVMBuildPointerCast(builder, list,
                                            const_array(ctx->v4i32, 0), "");
                break;
        }

        return build_indexed_load_const(ctx, list, index);
}

static LLVMValueRef get_sampler_desc(struct si_shader_context *ctx,
                                     LLVMValueRef index, enum desc_type type)
{
        LLVMValueRef list = LLVMGetParam(ctx->radeon_bld.main_fn,
                                         SI_PARAM_SAMPLERS);

        return get_sampler_desc_custom(ctx, list, index, type);
}

/* Disable anisotropic filtering if BASE_LEVEL == LAST_LEVEL.
 *
 * SI-CI:
 *   If BASE_LEVEL == LAST_LEVEL, the shader must disable anisotropic
 *   filtering manually. The driver sets img7 to a mask clearing
 *   MAX_ANISO_RATIO if BASE_LEVEL == LAST_LEVEL. The shader must do:
 *     s_and_b32 samp0, samp0, img7
 *
 * VI:
 *   The ANISO_OVERRIDE sampler field enables this fix in TA.
 */
static LLVMValueRef sici_fix_sampler_aniso(struct si_shader_context *ctx,
                                           LLVMValueRef res, LLVMValueRef samp)
{
        LLVMBuilderRef builder = ctx->radeon_bld.gallivm.builder;
        LLVMValueRef img7, samp0;

        if (ctx->screen->b.chip_class >= VI)
                return samp;

        img7 = LLVMBuildExtractElement(builder, res,
                                       LLVMConstInt(ctx->i32, 7, 0), "");
        samp0 = LLVMBuildExtractElement(builder, samp,
                                        LLVMConstInt(ctx->i32, 0, 0), "");
        samp0 = LLVMBuildAnd(builder, samp0, img7, "");
        return LLVMBuildInsertElement(builder, samp, samp0,
                                      LLVMConstInt(ctx->i32, 0, 0), "");
}

static void tex_fetch_ptrs(
        struct lp_build_tgsi_context *bld_base,
        struct lp_build_emit_data *emit_data,
        LLVMValueRef *res_ptr, LLVMValueRef *samp_ptr, LLVMValueRef *fmask_ptr)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        const struct tgsi_full_instruction *inst = emit_data->inst;
        unsigned target = inst->Texture.Texture;
        unsigned sampler_src;
        unsigned sampler_index;

        sampler_src = emit_data->inst->Instruction.NumSrcRegs - 1;
        sampler_index = emit_data->inst->Src[sampler_src].Register.Index;

        if (emit_data->inst->Src[sampler_src].Register.Indirect) {
                const struct tgsi_full_src_register *reg = &emit_data->inst->Src[sampler_src];
                LLVMValueRef ind_index;

                ind_index = get_bounded_indirect_index(ctx,
                                                       &reg->Indirect,
                                                       reg->Register.Index,
                                                       SI_NUM_SAMPLERS);

                *res_ptr = get_sampler_desc(ctx, ind_index, DESC_IMAGE);

                if (target == TGSI_TEXTURE_2D_MSAA ||
                    target == TGSI_TEXTURE_2D_ARRAY_MSAA) {
                        if (samp_ptr)
                                *samp_ptr = NULL;
                        if (fmask_ptr)
                                *fmask_ptr = get_sampler_desc(ctx, ind_index, DESC_FMASK);
                } else {
                        if (samp_ptr) {
                                *samp_ptr = get_sampler_desc(ctx, ind_index, DESC_SAMPLER);
                                *samp_ptr = sici_fix_sampler_aniso(ctx, *res_ptr, *samp_ptr);
                        }
                        if (fmask_ptr)
                                *fmask_ptr = NULL;
                }
        } else {
                *res_ptr = ctx->sampler_views[sampler_index];
                if (samp_ptr)
                        *samp_ptr = ctx->sampler_states[sampler_index];
                if (fmask_ptr)
                        *fmask_ptr = ctx->fmasks[sampler_index];
        }
}

static void txq_fetch_args(
        struct lp_build_tgsi_context *bld_base,
        struct lp_build_emit_data *emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        const struct tgsi_full_instruction *inst = emit_data->inst;
        unsigned target = inst->Texture.Texture;
        LLVMValueRef res_ptr;
        LLVMValueRef address;

        tex_fetch_ptrs(bld_base, emit_data, &res_ptr, NULL, NULL);

        if (target == TGSI_TEXTURE_BUFFER) {
                /* Read the size from the buffer descriptor directly. */
                LLVMValueRef res = LLVMBuildBitCast(builder, res_ptr, ctx->v8i32, "");
                emit_data->args[0] = get_buffer_size(bld_base, res);
                return;
        }

        /* Textures - set the mip level. */
        address = lp_build_emit_fetch(bld_base, inst, 0, TGSI_CHAN_X);

        set_tex_fetch_args(ctx, emit_data, TGSI_OPCODE_TXQ, target, res_ptr,
                           NULL, &address, 1, 0xf);
}

static void txq_emit(const struct lp_build_tgsi_action *action,
                     struct lp_build_tgsi_context *bld_base,
                     struct lp_build_emit_data *emit_data)
{
        struct lp_build_context *base = &bld_base->base;
        unsigned target = emit_data->inst->Texture.Texture;

        if (target == TGSI_TEXTURE_BUFFER) {
                /* Just return the buffer size. */
                emit_data->output[emit_data->chan] = emit_data->args[0];
                return;
        }

        emit_data->output[emit_data->chan] = lp_build_intrinsic(
                base->gallivm->builder, "llvm.SI.getresinfo.i32",
                emit_data->dst_type, emit_data->args, emit_data->arg_count,
                LLVMReadNoneAttribute | LLVMNoUnwindAttribute);

        /* Divide the number of layers by 6 to get the number of cubes. */
        if (target == TGSI_TEXTURE_CUBE_ARRAY ||
            target == TGSI_TEXTURE_SHADOWCUBE_ARRAY) {
                LLVMBuilderRef builder = bld_base->base.gallivm->builder;
                LLVMValueRef two = lp_build_const_int32(bld_base->base.gallivm, 2);
                LLVMValueRef six = lp_build_const_int32(bld_base->base.gallivm, 6);

                LLVMValueRef v4 = emit_data->output[emit_data->chan];
                LLVMValueRef z = LLVMBuildExtractElement(builder, v4, two, "");
                z = LLVMBuildSDiv(builder, z, six, "");

                emit_data->output[emit_data->chan] =
                        LLVMBuildInsertElement(builder, v4, z, two, "");
        }
}

static void tex_fetch_args(
        struct lp_build_tgsi_context *bld_base,
        struct lp_build_emit_data *emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        const struct tgsi_full_instruction *inst = emit_data->inst;
        unsigned opcode = inst->Instruction.Opcode;
        unsigned target = inst->Texture.Texture;
        LLVMValueRef coords[5], derivs[6];
        LLVMValueRef address[16];
        unsigned num_coords = tgsi_util_get_texture_coord_dim(target);
        int ref_pos = tgsi_util_get_shadow_ref_src_index(target);
        unsigned count = 0;
        unsigned chan;
        unsigned num_deriv_channels = 0;
        bool has_offset = inst->Texture.NumOffsets > 0;
        LLVMValueRef res_ptr, samp_ptr, fmask_ptr = NULL;
        unsigned dmask = 0xf;

        tex_fetch_ptrs(bld_base, emit_data, &res_ptr, &samp_ptr, &fmask_ptr);

        if (target == TGSI_TEXTURE_BUFFER) {
                LLVMTypeRef v2i128 = LLVMVectorType(ctx->i128, 2);

                /* Bitcast and truncate v8i32 to v16i8. */
                LLVMValueRef res = res_ptr;
                res = LLVMBuildBitCast(gallivm->builder, res, v2i128, "");
                res = LLVMBuildExtractElement(gallivm->builder, res, bld_base->uint_bld.one, "");
                res = LLVMBuildBitCast(gallivm->builder, res, ctx->v16i8, "");

                emit_data->dst_type = ctx->v4f32;
                emit_data->args[0] = res;
                emit_data->args[1] = bld_base->uint_bld.zero;
                emit_data->args[2] = lp_build_emit_fetch(bld_base, emit_data->inst, 0, TGSI_CHAN_X);
                emit_data->arg_count = 3;
                return;
        }

        /* Fetch and project texture coordinates */
        coords[3] = lp_build_emit_fetch(bld_base, emit_data->inst, 0, TGSI_CHAN_W);
        for (chan = 0; chan < 3; chan++ ) {
                coords[chan] = lp_build_emit_fetch(bld_base,
                                                   emit_data->inst, 0,
                                                   chan);
                if (opcode == TGSI_OPCODE_TXP)
                        coords[chan] = lp_build_emit_llvm_binary(bld_base,
                                                                 TGSI_OPCODE_DIV,
                                                                 coords[chan],
                                                                 coords[3]);
        }

        if (opcode == TGSI_OPCODE_TXP)
                coords[3] = bld_base->base.one;

        /* Pack offsets. */
        if (has_offset && opcode != TGSI_OPCODE_TXF) {
                /* The offsets are six-bit signed integers packed like this:
                 *   X=[5:0], Y=[13:8], and Z=[21:16].
                 */
                LLVMValueRef offset[3], pack;

                assert(inst->Texture.NumOffsets == 1);

                for (chan = 0; chan < 3; chan++) {
                        offset[chan] = lp_build_emit_fetch_texoffset(bld_base,
                                                                     emit_data->inst, 0, chan);
                        offset[chan] = LLVMBuildAnd(gallivm->builder, offset[chan],
                                                    lp_build_const_int32(gallivm, 0x3f), "");
                        if (chan)
                                offset[chan] = LLVMBuildShl(gallivm->builder, offset[chan],
                                                            lp_build_const_int32(gallivm, chan*8), "");
                }

                pack = LLVMBuildOr(gallivm->builder, offset[0], offset[1], "");
                pack = LLVMBuildOr(gallivm->builder, pack, offset[2], "");
                address[count++] = pack;
        }

        /* Pack LOD bias value */
        if (opcode == TGSI_OPCODE_TXB)
                address[count++] = coords[3];
        if (opcode == TGSI_OPCODE_TXB2)
                address[count++] = lp_build_emit_fetch(bld_base, inst, 1, TGSI_CHAN_X);

        /* Pack depth comparison value */
        if (tgsi_is_shadow_target(target) && opcode != TGSI_OPCODE_LODQ) {
                if (target == TGSI_TEXTURE_SHADOWCUBE_ARRAY) {
                        address[count++] = lp_build_emit_fetch(bld_base, inst, 1, TGSI_CHAN_X);
                } else {
                        assert(ref_pos >= 0);
                        address[count++] = coords[ref_pos];
                }
        }

        /* Pack user derivatives */
        if (opcode == TGSI_OPCODE_TXD) {
                int param, num_src_deriv_channels;

                switch (target) {
                case TGSI_TEXTURE_3D:
                        num_src_deriv_channels = 3;
                        num_deriv_channels = 3;
                        break;
                case TGSI_TEXTURE_2D:
                case TGSI_TEXTURE_SHADOW2D:
                case TGSI_TEXTURE_RECT:
                case TGSI_TEXTURE_SHADOWRECT:
                case TGSI_TEXTURE_2D_ARRAY:
                case TGSI_TEXTURE_SHADOW2D_ARRAY:
                        num_src_deriv_channels = 2;
                        num_deriv_channels = 2;
                        break;
                case TGSI_TEXTURE_CUBE:
                case TGSI_TEXTURE_SHADOWCUBE:
                case TGSI_TEXTURE_CUBE_ARRAY:
                case TGSI_TEXTURE_SHADOWCUBE_ARRAY:
                        /* Cube derivatives will be converted to 2D. */
                        num_src_deriv_channels = 3;
                        num_deriv_channels = 2;
                        break;
                case TGSI_TEXTURE_1D:
                case TGSI_TEXTURE_SHADOW1D:
                case TGSI_TEXTURE_1D_ARRAY:
                case TGSI_TEXTURE_SHADOW1D_ARRAY:
                        num_src_deriv_channels = 1;
                        num_deriv_channels = 1;
                        break;
                default:
                        unreachable("invalid target");
                }

                for (param = 0; param < 2; param++)
                        for (chan = 0; chan < num_src_deriv_channels; chan++)
                                derivs[param * num_src_deriv_channels + chan] =
                                        lp_build_emit_fetch(bld_base, inst, param+1, chan);
        }

        if (target == TGSI_TEXTURE_CUBE ||
            target == TGSI_TEXTURE_CUBE_ARRAY ||
            target == TGSI_TEXTURE_SHADOWCUBE ||
            target == TGSI_TEXTURE_SHADOWCUBE_ARRAY)
                radeon_llvm_emit_prepare_cube_coords(bld_base, emit_data, coords, derivs);

        if (opcode == TGSI_OPCODE_TXD)
                for (int i = 0; i < num_deriv_channels * 2; i++)
                        address[count++] = derivs[i];

        /* Pack texture coordinates */
        address[count++] = coords[0];
        if (num_coords > 1)
                address[count++] = coords[1];
        if (num_coords > 2)
                address[count++] = coords[2];

        /* Pack LOD or sample index */
        if (opcode == TGSI_OPCODE_TXL || opcode == TGSI_OPCODE_TXF)
                address[count++] = coords[3];
        else if (opcode == TGSI_OPCODE_TXL2)
                address[count++] = lp_build_emit_fetch(bld_base, inst, 1, TGSI_CHAN_X);

        if (count > 16) {
                assert(!"Cannot handle more than 16 texture address parameters");
                count = 16;
        }

        for (chan = 0; chan < count; chan++ ) {
                address[chan] = LLVMBuildBitCast(gallivm->builder,
                                                 address[chan], ctx->i32, "");
        }

        /* Adjust the sample index according to FMASK.
         *
         * For uncompressed MSAA surfaces, FMASK should return 0x76543210,
         * which is the identity mapping. Each nibble says which physical sample
         * should be fetched to get that sample.
         *
         * For example, 0x11111100 means there are only 2 samples stored and
         * the second sample covers 3/4 of the pixel. When reading samples 0
         * and 1, return physical sample 0 (determined by the first two 0s
         * in FMASK), otherwise return physical sample 1.
         *
         * The sample index should be adjusted as follows:
         *   sample_index = (fmask >> (sample_index * 4)) & 0xF;
         */
        if (target == TGSI_TEXTURE_2D_MSAA ||
            target == TGSI_TEXTURE_2D_ARRAY_MSAA) {
                struct lp_build_context *uint_bld = &bld_base->uint_bld;
                struct lp_build_emit_data txf_emit_data = *emit_data;
                LLVMValueRef txf_address[4];
                unsigned txf_count = count;
                struct tgsi_full_instruction inst = {};

                memcpy(txf_address, address, sizeof(txf_address));

                if (target == TGSI_TEXTURE_2D_MSAA) {
                        txf_address[2] = bld_base->uint_bld.zero;
                }
                txf_address[3] = bld_base->uint_bld.zero;

                /* Read FMASK using TXF. */
                inst.Instruction.Opcode = TGSI_OPCODE_TXF;
                inst.Texture.Texture = target;
                txf_emit_data.inst = &inst;
                txf_emit_data.chan = 0;
                set_tex_fetch_args(ctx, &txf_emit_data, TGSI_OPCODE_TXF,
                                   target, fmask_ptr, NULL,
                                   txf_address, txf_count, 0xf);
                build_tex_intrinsic(&tex_action, bld_base, &txf_emit_data);

                /* Initialize some constants. */
                LLVMValueRef four = LLVMConstInt(ctx->i32, 4, 0);
                LLVMValueRef F = LLVMConstInt(ctx->i32, 0xF, 0);

                /* Apply the formula. */
                LLVMValueRef fmask =
                        LLVMBuildExtractElement(gallivm->builder,
                                                txf_emit_data.output[0],
                                                uint_bld->zero, "");

                unsigned sample_chan = target == TGSI_TEXTURE_2D_MSAA ? 2 : 3;

                LLVMValueRef sample_index4 =
                        LLVMBuildMul(gallivm->builder, address[sample_chan], four, "");

                LLVMValueRef shifted_fmask =
                        LLVMBuildLShr(gallivm->builder, fmask, sample_index4, "");

                LLVMValueRef final_sample =
                        LLVMBuildAnd(gallivm->builder, shifted_fmask, F, "");

                /* Don't rewrite the sample index if WORD1.DATA_FORMAT of the FMASK
                 * resource descriptor is 0 (invalid),
                 */
                LLVMValueRef fmask_desc =
                        LLVMBuildBitCast(gallivm->builder, fmask_ptr,
                                         ctx->v8i32, "");

                LLVMValueRef fmask_word1 =
                        LLVMBuildExtractElement(gallivm->builder, fmask_desc,
                                                uint_bld->one, "");

                LLVMValueRef word1_is_nonzero =
                        LLVMBuildICmp(gallivm->builder, LLVMIntNE,
                                      fmask_word1, uint_bld->zero, "");

                /* Replace the MSAA sample index. */
                address[sample_chan] =
                        LLVMBuildSelect(gallivm->builder, word1_is_nonzero,
                                        final_sample, address[sample_chan], "");
        }

        if (opcode == TGSI_OPCODE_TXF) {
                /* add tex offsets */
                if (inst->Texture.NumOffsets) {
                        struct lp_build_context *uint_bld = &bld_base->uint_bld;
                        struct lp_build_tgsi_soa_context *bld = lp_soa_context(bld_base);
                        const struct tgsi_texture_offset *off = inst->TexOffsets;

                        assert(inst->Texture.NumOffsets == 1);

                        switch (target) {
                        case TGSI_TEXTURE_3D:
                                address[2] = lp_build_add(uint_bld, address[2],
                                                bld->immediates[off->Index][off->SwizzleZ]);
                                /* fall through */
                        case TGSI_TEXTURE_2D:
                        case TGSI_TEXTURE_SHADOW2D:
                        case TGSI_TEXTURE_RECT:
                        case TGSI_TEXTURE_SHADOWRECT:
                        case TGSI_TEXTURE_2D_ARRAY:
                        case TGSI_TEXTURE_SHADOW2D_ARRAY:
                                address[1] =
                                        lp_build_add(uint_bld, address[1],
                                                bld->immediates[off->Index][off->SwizzleY]);
                                /* fall through */
                        case TGSI_TEXTURE_1D:
                        case TGSI_TEXTURE_SHADOW1D:
                        case TGSI_TEXTURE_1D_ARRAY:
                        case TGSI_TEXTURE_SHADOW1D_ARRAY:
                                address[0] =
                                        lp_build_add(uint_bld, address[0],
                                                bld->immediates[off->Index][off->SwizzleX]);
                                break;
                                /* texture offsets do not apply to other texture targets */
                        }
                }
        }

        if (opcode == TGSI_OPCODE_TG4) {
                unsigned gather_comp = 0;

                /* DMASK was repurposed for GATHER4. 4 components are always
                 * returned and DMASK works like a swizzle - it selects
                 * the component to fetch. The only valid DMASK values are
                 * 1=red, 2=green, 4=blue, 8=alpha. (e.g. 1 returns
                 * (red,red,red,red) etc.) The ISA document doesn't mention
                 * this.
                 */

                /* Get the component index from src1.x for Gather4. */
                if (!tgsi_is_shadow_target(target)) {
                        LLVMValueRef (*imms)[4] = lp_soa_context(bld_base)->immediates;
                        LLVMValueRef comp_imm;
                        struct tgsi_src_register src1 = inst->Src[1].Register;

                        assert(src1.File == TGSI_FILE_IMMEDIATE);

                        comp_imm = imms[src1.Index][src1.SwizzleX];
                        gather_comp = LLVMConstIntGetZExtValue(comp_imm);
                        gather_comp = CLAMP(gather_comp, 0, 3);
                }

                dmask = 1 << gather_comp;
        }

        set_tex_fetch_args(ctx, emit_data, opcode, target, res_ptr,
                           samp_ptr, address, count, dmask);
}

static void build_tex_intrinsic(const struct lp_build_tgsi_action *action,
                                struct lp_build_tgsi_context *bld_base,
                                struct lp_build_emit_data *emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct lp_build_context *base = &bld_base->base;
        unsigned opcode = emit_data->inst->Instruction.Opcode;
        unsigned target = emit_data->inst->Texture.Texture;
        char intr_name[127];
        bool has_offset = emit_data->inst->Texture.NumOffsets > 0;
        bool is_shadow = tgsi_is_shadow_target(target);
        char type[64];
        const char *name = "llvm.SI.image.sample";
        const char *infix = "";

        if (target == TGSI_TEXTURE_BUFFER) {
                emit_data->output[emit_data->chan] = lp_build_intrinsic(
                        base->gallivm->builder,
                        "llvm.SI.vs.load.input", emit_data->dst_type,
                        emit_data->args, emit_data->arg_count,
                        LLVMReadNoneAttribute | LLVMNoUnwindAttribute);
                return;
        }

        switch (opcode) {
        case TGSI_OPCODE_TXF:
                name = target == TGSI_TEXTURE_2D_MSAA ||
                       target == TGSI_TEXTURE_2D_ARRAY_MSAA ?
                               "llvm.SI.image.load" :
                               "llvm.SI.image.load.mip";
                is_shadow = false;
                has_offset = false;
                break;
        case TGSI_OPCODE_LODQ:
                name = "llvm.SI.getlod";
                is_shadow = false;
                has_offset = false;
                break;
        case TGSI_OPCODE_TEX:
        case TGSI_OPCODE_TEX2:
        case TGSI_OPCODE_TXP:
                if (ctx->type != PIPE_SHADER_FRAGMENT)
                        infix = ".lz";
                break;
        case TGSI_OPCODE_TXB:
        case TGSI_OPCODE_TXB2:
                assert(ctx->type == PIPE_SHADER_FRAGMENT);
                infix = ".b";
                break;
        case TGSI_OPCODE_TXL:
        case TGSI_OPCODE_TXL2:
                infix = ".l";
                break;
        case TGSI_OPCODE_TXD:
                infix = ".d";
                break;
        case TGSI_OPCODE_TG4:
                name = "llvm.SI.gather4";
                infix = ".lz";
                break;
        default:
                assert(0);
                return;
        }

        /* Add the type and suffixes .c, .o if needed. */
        build_int_type_name(LLVMTypeOf(emit_data->args[0]), type, sizeof(type));
        sprintf(intr_name, "%s%s%s%s.%s",
                name, is_shadow ? ".c" : "", infix,
                has_offset ? ".o" : "", type);

        emit_data->output[emit_data->chan] = lp_build_intrinsic(
                base->gallivm->builder, intr_name, emit_data->dst_type,
                emit_data->args, emit_data->arg_count,
                LLVMReadNoneAttribute | LLVMNoUnwindAttribute);
}

static void si_llvm_emit_txqs(
        const struct lp_build_tgsi_action *action,
        struct lp_build_tgsi_context *bld_base,
        struct lp_build_emit_data *emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        LLVMValueRef res, samples;
        LLVMValueRef res_ptr, samp_ptr, fmask_ptr = NULL;

        tex_fetch_ptrs(bld_base, emit_data, &res_ptr, &samp_ptr, &fmask_ptr);


        /* Read the samples from the descriptor directly. */
        res = LLVMBuildBitCast(builder, res_ptr, ctx->v8i32, "");
        samples = LLVMBuildExtractElement(
                builder, res,
                lp_build_const_int32(gallivm, 3), "");
        samples = LLVMBuildLShr(builder, samples,
                                lp_build_const_int32(gallivm, 16), "");
        samples = LLVMBuildAnd(builder, samples,
                               lp_build_const_int32(gallivm, 0xf), "");
        samples = LLVMBuildShl(builder, lp_build_const_int32(gallivm, 1),
                               samples, "");

        emit_data->output[emit_data->chan] = samples;
}

/*
 * SI implements derivatives using the local data store (LDS)
 * All writes to the LDS happen in all executing threads at
 * the same time. TID is the Thread ID for the current
 * thread and is a value between 0 and 63, representing
 * the thread's position in the wavefront.
 *
 * For the pixel shader threads are grouped into quads of four pixels.
 * The TIDs of the pixels of a quad are:
 *
 *  +------+------+
 *  |4n + 0|4n + 1|
 *  +------+------+
 *  |4n + 2|4n + 3|
 *  +------+------+
 *
 * So, masking the TID with 0xfffffffc yields the TID of the top left pixel
 * of the quad, masking with 0xfffffffd yields the TID of the top pixel of
 * the current pixel's column, and masking with 0xfffffffe yields the TID
 * of the left pixel of the current pixel's row.
 *
 * Adding 1 yields the TID of the pixel to the right of the left pixel, and
 * adding 2 yields the TID of the pixel below the top pixel.
 */
/* masks for thread ID. */
#define TID_MASK_TOP_LEFT 0xfffffffc
#define TID_MASK_TOP      0xfffffffd
#define TID_MASK_LEFT     0xfffffffe

static void si_llvm_emit_ddxy(
        const struct lp_build_tgsi_action *action,
        struct lp_build_tgsi_context *bld_base,
        struct lp_build_emit_data *emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        const struct tgsi_full_instruction *inst = emit_data->inst;
        unsigned opcode = inst->Instruction.Opcode;
        LLVMValueRef indices[2];
        LLVMValueRef store_ptr, load_ptr0, load_ptr1;
        LLVMValueRef tl, trbl, result[4];
        LLVMValueRef tl_tid, trbl_tid;
        unsigned swizzle[4];
        unsigned c;
        int idx;
        unsigned mask;

        indices[0] = bld_base->uint_bld.zero;
        indices[1] = get_thread_id(ctx);
        store_ptr = LLVMBuildGEP(gallivm->builder, ctx->lds,
                                 indices, 2, "");

        if (opcode == TGSI_OPCODE_DDX_FINE)
                mask = TID_MASK_LEFT;
        else if (opcode == TGSI_OPCODE_DDY_FINE)
                mask = TID_MASK_TOP;
        else
                mask = TID_MASK_TOP_LEFT;

        tl_tid = LLVMBuildAnd(gallivm->builder, indices[1],
                                lp_build_const_int32(gallivm, mask), "");
        indices[1] = tl_tid;
        load_ptr0 = LLVMBuildGEP(gallivm->builder, ctx->lds,
                                 indices, 2, "");

        /* for DDX we want to next X pixel, DDY next Y pixel. */
        idx = (opcode == TGSI_OPCODE_DDX || opcode == TGSI_OPCODE_DDX_FINE) ? 1 : 2;
        trbl_tid = LLVMBuildAdd(gallivm->builder, indices[1],
                                  lp_build_const_int32(gallivm, idx), "");
        indices[1] = trbl_tid;
        load_ptr1 = LLVMBuildGEP(gallivm->builder, ctx->lds,
                                 indices, 2, "");

        for (c = 0; c < 4; ++c) {
                unsigned i;
                LLVMValueRef val;
                LLVMValueRef args[2];

                swizzle[c] = tgsi_util_get_full_src_register_swizzle(&inst->Src[0], c);
                for (i = 0; i < c; ++i) {
                        if (swizzle[i] == swizzle[c]) {
                                result[c] = result[i];
                                break;
                        }
                }
                if (i != c)
                        continue;

                val = LLVMBuildBitCast(gallivm->builder,
                                lp_build_emit_fetch(bld_base, inst, 0, c),
                                                ctx->i32, "");

                if ((HAVE_LLVM >= 0x0309) && ctx->screen->b.family >= CHIP_TONGA) {

                        args[0] = LLVMBuildMul(gallivm->builder, tl_tid,
                                        lp_build_const_int32(gallivm, 4), "");
                        args[1] = val;
                        tl = lp_build_intrinsic(gallivm->builder,
                                        "llvm.amdgcn.ds.bpermute", ctx->i32,
                                        args, 2, LLVMReadNoneAttribute);

                        args[0] = LLVMBuildMul(gallivm->builder, trbl_tid,
                                        lp_build_const_int32(gallivm, 4), "");
                        trbl = lp_build_intrinsic(gallivm->builder,
                                        "llvm.amdgcn.ds.bpermute", ctx->i32,
                                        args, 2, LLVMReadNoneAttribute);
                } else {
                        LLVMBuildStore(gallivm->builder, val, store_ptr);
                        tl = LLVMBuildLoad(gallivm->builder, load_ptr0, "");
                        trbl = LLVMBuildLoad(gallivm->builder, load_ptr1, "");
                }
                tl = LLVMBuildBitCast(gallivm->builder, tl, ctx->f32, "");
                trbl = LLVMBuildBitCast(gallivm->builder, trbl, ctx->f32, "");
                result[c] = LLVMBuildFSub(gallivm->builder, trbl, tl, "");
        }

        emit_data->output[0] = lp_build_gather_values(gallivm, result, 4);
}

/*
 * this takes an I,J coordinate pair,
 * and works out the X and Y derivatives.
 * it returns DDX(I), DDX(J), DDY(I), DDY(J).
 */
static LLVMValueRef si_llvm_emit_ddxy_interp(
        struct lp_build_tgsi_context *bld_base,
        LLVMValueRef interp_ij)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMValueRef indices[2];
        LLVMValueRef store_ptr, load_ptr_x, load_ptr_y, load_ptr_ddx, load_ptr_ddy, temp, temp2;
        LLVMValueRef tl, tr, bl, result[4];
        unsigned c;

        indices[0] = bld_base->uint_bld.zero;
        indices[1] = get_thread_id(ctx);
        store_ptr = LLVMBuildGEP(gallivm->builder, ctx->lds,
                                 indices, 2, "");

        temp = LLVMBuildAnd(gallivm->builder, indices[1],
                            lp_build_const_int32(gallivm, TID_MASK_LEFT), "");

        temp2 = LLVMBuildAnd(gallivm->builder, indices[1],
                             lp_build_const_int32(gallivm, TID_MASK_TOP), "");

        indices[1] = temp;
        load_ptr_x = LLVMBuildGEP(gallivm->builder, ctx->lds,
                                  indices, 2, "");

        indices[1] = temp2;
        load_ptr_y = LLVMBuildGEP(gallivm->builder, ctx->lds,
                                  indices, 2, "");

        indices[1] = LLVMBuildAdd(gallivm->builder, temp,
                                  lp_build_const_int32(gallivm, 1), "");
        load_ptr_ddx = LLVMBuildGEP(gallivm->builder, ctx->lds,
                                   indices, 2, "");

        indices[1] = LLVMBuildAdd(gallivm->builder, temp2,
                                  lp_build_const_int32(gallivm, 2), "");
        load_ptr_ddy = LLVMBuildGEP(gallivm->builder, ctx->lds,
                                   indices, 2, "");

        for (c = 0; c < 2; ++c) {
                LLVMValueRef store_val;
                LLVMValueRef c_ll = lp_build_const_int32(gallivm, c);

                store_val = LLVMBuildExtractElement(gallivm->builder,
                                                    interp_ij, c_ll, "");
                LLVMBuildStore(gallivm->builder,
                               store_val,
                               store_ptr);

                tl = LLVMBuildLoad(gallivm->builder, load_ptr_x, "");
                tl = LLVMBuildBitCast(gallivm->builder, tl, ctx->f32, "");

                tr = LLVMBuildLoad(gallivm->builder, load_ptr_ddx, "");
                tr = LLVMBuildBitCast(gallivm->builder, tr, ctx->f32, "");

                result[c] = LLVMBuildFSub(gallivm->builder, tr, tl, "");

                tl = LLVMBuildLoad(gallivm->builder, load_ptr_y, "");
                tl = LLVMBuildBitCast(gallivm->builder, tl, ctx->f32, "");

                bl = LLVMBuildLoad(gallivm->builder, load_ptr_ddy, "");
                bl = LLVMBuildBitCast(gallivm->builder, bl, ctx->f32, "");

                result[c + 2] = LLVMBuildFSub(gallivm->builder, bl, tl, "");
        }

        return lp_build_gather_values(gallivm, result, 4);
}

static void interp_fetch_args(
        struct lp_build_tgsi_context *bld_base,
        struct lp_build_emit_data *emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        const struct tgsi_full_instruction *inst = emit_data->inst;

        if (inst->Instruction.Opcode == TGSI_OPCODE_INTERP_OFFSET) {
                /* offset is in second src, first two channels */
                emit_data->args[0] = lp_build_emit_fetch(bld_base,
                                                         emit_data->inst, 1,
                                                         TGSI_CHAN_X);
                emit_data->args[1] = lp_build_emit_fetch(bld_base,
                                                         emit_data->inst, 1,
                                                         TGSI_CHAN_Y);
                emit_data->arg_count = 2;
        } else if (inst->Instruction.Opcode == TGSI_OPCODE_INTERP_SAMPLE) {
                LLVMValueRef sample_position;
                LLVMValueRef sample_id;
                LLVMValueRef halfval = lp_build_const_float(gallivm, 0.5f);

                /* fetch sample ID, then fetch its sample position,
                 * and place into first two channels.
                 */
                sample_id = lp_build_emit_fetch(bld_base,
                                                emit_data->inst, 1, TGSI_CHAN_X);
                sample_id = LLVMBuildBitCast(gallivm->builder, sample_id,
                                             ctx->i32, "");
                sample_position = load_sample_position(&ctx->radeon_bld, sample_id);

                emit_data->args[0] = LLVMBuildExtractElement(gallivm->builder,
                                                             sample_position,
                                                             lp_build_const_int32(gallivm, 0), "");

                emit_data->args[0] = LLVMBuildFSub(gallivm->builder, emit_data->args[0], halfval, "");
                emit_data->args[1] = LLVMBuildExtractElement(gallivm->builder,
                                                             sample_position,
                                                             lp_build_const_int32(gallivm, 1), "");
                emit_data->args[1] = LLVMBuildFSub(gallivm->builder, emit_data->args[1], halfval, "");
                emit_data->arg_count = 2;
        }
}

static void build_interp_intrinsic(const struct lp_build_tgsi_action *action,
                                struct lp_build_tgsi_context *bld_base,
                                struct lp_build_emit_data *emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct si_shader *shader = ctx->shader;
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMValueRef interp_param;
        const struct tgsi_full_instruction *inst = emit_data->inst;
        const char *intr_name;
        int input_index = inst->Src[0].Register.Index;
        int chan;
        int i;
        LLVMValueRef attr_number;
        LLVMValueRef params = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_PRIM_MASK);
        int interp_param_idx;
        unsigned interp = shader->selector->info.input_interpolate[input_index];
        unsigned location;

        assert(inst->Src[0].Register.File == TGSI_FILE_INPUT);

        if (inst->Instruction.Opcode == TGSI_OPCODE_INTERP_OFFSET ||
            inst->Instruction.Opcode == TGSI_OPCODE_INTERP_SAMPLE)
                location = TGSI_INTERPOLATE_LOC_CENTER;
        else
                location = TGSI_INTERPOLATE_LOC_CENTROID;

        interp_param_idx = lookup_interp_param_index(interp, location);
        if (interp_param_idx == -1)
                return;
        else if (interp_param_idx)
                interp_param = get_interp_param(ctx, interp_param_idx);
        else
                interp_param = NULL;

        attr_number = lp_build_const_int32(gallivm, input_index);

        if (inst->Instruction.Opcode == TGSI_OPCODE_INTERP_OFFSET ||
            inst->Instruction.Opcode == TGSI_OPCODE_INTERP_SAMPLE) {
                LLVMValueRef ij_out[2];
                LLVMValueRef ddxy_out = si_llvm_emit_ddxy_interp(bld_base, interp_param);

                /*
                 * take the I then J parameters, and the DDX/Y for it, and
                 * calculate the IJ inputs for the interpolator.
                 * temp1 = ddx * offset/sample.x + I;
                 * interp_param.I = ddy * offset/sample.y + temp1;
                 * temp1 = ddx * offset/sample.x + J;
                 * interp_param.J = ddy * offset/sample.y + temp1;
                 */
                for (i = 0; i < 2; i++) {
                        LLVMValueRef ix_ll = lp_build_const_int32(gallivm, i);
                        LLVMValueRef iy_ll = lp_build_const_int32(gallivm, i + 2);
                        LLVMValueRef ddx_el = LLVMBuildExtractElement(gallivm->builder,
                                                                      ddxy_out, ix_ll, "");
                        LLVMValueRef ddy_el = LLVMBuildExtractElement(gallivm->builder,
                                                                      ddxy_out, iy_ll, "");
                        LLVMValueRef interp_el = LLVMBuildExtractElement(gallivm->builder,
                                                                         interp_param, ix_ll, "");
                        LLVMValueRef temp1, temp2;

                        interp_el = LLVMBuildBitCast(gallivm->builder, interp_el,
                                                     ctx->f32, "");

                        temp1 = LLVMBuildFMul(gallivm->builder, ddx_el, emit_data->args[0], "");

                        temp1 = LLVMBuildFAdd(gallivm->builder, temp1, interp_el, "");

                        temp2 = LLVMBuildFMul(gallivm->builder, ddy_el, emit_data->args[1], "");

                        temp2 = LLVMBuildFAdd(gallivm->builder, temp2, temp1, "");

                        ij_out[i] = LLVMBuildBitCast(gallivm->builder,
                                                     temp2, ctx->i32, "");
                }
                interp_param = lp_build_gather_values(bld_base->base.gallivm, ij_out, 2);
        }

        intr_name = interp_param ? "llvm.SI.fs.interp" : "llvm.SI.fs.constant";
        for (chan = 0; chan < 2; chan++) {
                LLVMValueRef args[4];
                LLVMValueRef llvm_chan;
                unsigned schan;

                schan = tgsi_util_get_full_src_register_swizzle(&inst->Src[0], chan);
                llvm_chan = lp_build_const_int32(gallivm, schan);

                args[0] = llvm_chan;
                args[1] = attr_number;
                args[2] = params;
                args[3] = interp_param;

                emit_data->output[chan] =
                        lp_build_intrinsic(gallivm->builder, intr_name,
                                           ctx->f32, args, args[3] ? 4 : 3,
                                           LLVMReadNoneAttribute | LLVMNoUnwindAttribute);
        }
}

static unsigned si_llvm_get_stream(struct lp_build_tgsi_context *bld_base,
                                       struct lp_build_emit_data *emit_data)
{
        LLVMValueRef (*imms)[4] = lp_soa_context(bld_base)->immediates;
        struct tgsi_src_register src0 = emit_data->inst->Src[0].Register;
        unsigned stream;

        assert(src0.File == TGSI_FILE_IMMEDIATE);

        stream = LLVMConstIntGetZExtValue(imms[src0.Index][src0.SwizzleX]) & 0x3;
        return stream;
}

/* Emit one vertex from the geometry shader */
static void si_llvm_emit_vertex(
        const struct lp_build_tgsi_action *action,
        struct lp_build_tgsi_context *bld_base,
        struct lp_build_emit_data *emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct lp_build_context *uint = &bld_base->uint_bld;
        struct si_shader *shader = ctx->shader;
        struct tgsi_shader_info *info = &shader->selector->info;
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMValueRef soffset = LLVMGetParam(ctx->radeon_bld.main_fn,
                                            SI_PARAM_GS2VS_OFFSET);
        LLVMValueRef gs_next_vertex;
        LLVMValueRef can_emit, kill;
        LLVMValueRef args[2];
        unsigned chan;
        int i;
        unsigned stream;

        stream = si_llvm_get_stream(bld_base, emit_data);

        /* Write vertex attribute values to GSVS ring */
        gs_next_vertex = LLVMBuildLoad(gallivm->builder,
                                       ctx->gs_next_vertex[stream],
                                       "");

        /* If this thread has already emitted the declared maximum number of
         * vertices, kill it: excessive vertex emissions are not supposed to
         * have any effect, and GS threads have no externally observable
         * effects other than emitting vertices.
         */
        can_emit = LLVMBuildICmp(gallivm->builder, LLVMIntULE, gs_next_vertex,
                                 lp_build_const_int32(gallivm,
                                                      shader->selector->gs_max_out_vertices), "");
        kill = lp_build_select(&bld_base->base, can_emit,
                               lp_build_const_float(gallivm, 1.0f),
                               lp_build_const_float(gallivm, -1.0f));

        lp_build_intrinsic(gallivm->builder, "llvm.AMDGPU.kill",
                           ctx->voidt, &kill, 1, 0);

        for (i = 0; i < info->num_outputs; i++) {
                LLVMValueRef *out_ptr =
                        ctx->radeon_bld.soa.outputs[i];

                for (chan = 0; chan < 4; chan++) {
                        LLVMValueRef out_val = LLVMBuildLoad(gallivm->builder, out_ptr[chan], "");
                        LLVMValueRef voffset =
                                lp_build_const_int32(gallivm, (i * 4 + chan) *
                                                     shader->selector->gs_max_out_vertices);

                        voffset = lp_build_add(uint, voffset, gs_next_vertex);
                        voffset = lp_build_mul_imm(uint, voffset, 4);

                        out_val = LLVMBuildBitCast(gallivm->builder, out_val, ctx->i32, "");

                        build_tbuffer_store(ctx,
                                            ctx->gsvs_ring[stream],
                                            out_val, 1,
                                            voffset, soffset, 0,
                                            V_008F0C_BUF_DATA_FORMAT_32,
                                            V_008F0C_BUF_NUM_FORMAT_UINT,
                                            1, 0, 1, 1, 0);
                }
        }
        gs_next_vertex = lp_build_add(uint, gs_next_vertex,
                                      lp_build_const_int32(gallivm, 1));

        LLVMBuildStore(gallivm->builder, gs_next_vertex, ctx->gs_next_vertex[stream]);

        /* Signal vertex emission */
        args[0] = lp_build_const_int32(gallivm, SENDMSG_GS_OP_EMIT | SENDMSG_GS | (stream << 8));
        args[1] = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_GS_WAVE_ID);
        lp_build_intrinsic(gallivm->builder, "llvm.SI.sendmsg",
                           ctx->voidt, args, 2, LLVMNoUnwindAttribute);
}

/* Cut one primitive from the geometry shader */
static void si_llvm_emit_primitive(
        const struct lp_build_tgsi_action *action,
        struct lp_build_tgsi_context *bld_base,
        struct lp_build_emit_data *emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMValueRef args[2];
        unsigned stream;

        /* Signal primitive cut */
        stream = si_llvm_get_stream(bld_base, emit_data);
        args[0] = lp_build_const_int32(gallivm, SENDMSG_GS_OP_CUT | SENDMSG_GS | (stream << 8));
        args[1] = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_GS_WAVE_ID);
        lp_build_intrinsic(gallivm->builder, "llvm.SI.sendmsg",
                           ctx->voidt, args, 2, LLVMNoUnwindAttribute);
}

static void si_llvm_emit_barrier(const struct lp_build_tgsi_action *action,
                                 struct lp_build_tgsi_context *bld_base,
                                 struct lp_build_emit_data *emit_data)
{
        struct si_shader_context *ctx = si_shader_context(bld_base);
        struct gallivm_state *gallivm = bld_base->base.gallivm;

        /* The real barrier instruction isn’t needed, because an entire patch
         * always fits into a single wave.
         */
        if (ctx->type == PIPE_SHADER_TESS_CTRL) {
                emit_optimization_barrier(ctx);
                return;
        }

        lp_build_intrinsic(gallivm->builder,
                           HAVE_LLVM >= 0x0309 ? "llvm.amdgcn.s.barrier"
                                               : "llvm.AMDGPU.barrier.local",
                           ctx->voidt, NULL, 0, LLVMNoUnwindAttribute);
}

static const struct lp_build_tgsi_action tex_action = {
        .fetch_args = tex_fetch_args,
        .emit = build_tex_intrinsic,
};

static const struct lp_build_tgsi_action interp_action = {
        .fetch_args = interp_fetch_args,
        .emit = build_interp_intrinsic,
};

static void si_create_function(struct si_shader_context *ctx,
                               LLVMTypeRef *returns, unsigned num_returns,
                               LLVMTypeRef *params, unsigned num_params,
                               int last_array_pointer, int last_sgpr)
{
        int i;

        radeon_llvm_create_func(&ctx->radeon_bld, returns, num_returns,
                                params, num_params);
        radeon_llvm_shader_type(ctx->radeon_bld.main_fn, ctx->type);
        ctx->return_value = LLVMGetUndef(ctx->radeon_bld.return_type);

        for (i = 0; i <= last_sgpr; ++i) {
                LLVMValueRef P = LLVMGetParam(ctx->radeon_bld.main_fn, i);

                /* We tell llvm that array inputs are passed by value to allow Sinking pass
                 * to move load. Inputs are constant so this is fine. */
                if (i <= last_array_pointer)
                        LLVMAddAttribute(P, LLVMByValAttribute);
                else
                        LLVMAddAttribute(P, LLVMInRegAttribute);
        }

        if (ctx->screen->b.debug_flags & DBG_UNSAFE_MATH) {
                /* These were copied from some LLVM test. */
                LLVMAddTargetDependentFunctionAttr(ctx->radeon_bld.main_fn,
                                                   "less-precise-fpmad",
                                                   "true");
                LLVMAddTargetDependentFunctionAttr(ctx->radeon_bld.main_fn,
                                                   "no-infs-fp-math",
                                                   "true");
                LLVMAddTargetDependentFunctionAttr(ctx->radeon_bld.main_fn,
                                                   "no-nans-fp-math",
                                                   "true");
                LLVMAddTargetDependentFunctionAttr(ctx->radeon_bld.main_fn,
                                                   "unsafe-fp-math",
                                                   "true");
        }
}

static void create_meta_data(struct si_shader_context *ctx)
{
        struct gallivm_state *gallivm = ctx->radeon_bld.soa.bld_base.base.gallivm;
        LLVMValueRef args[3];

        args[0] = LLVMMDStringInContext(gallivm->context, "const", 5);
        args[1] = 0;
        args[2] = lp_build_const_int32(gallivm, 1);

        ctx->const_md = LLVMMDNodeInContext(gallivm->context, args, 3);

        ctx->uniform_md_kind = LLVMGetMDKindIDInContext(gallivm->context,
                                                        "amdgpu.uniform", 14);

        ctx->empty_md = LLVMMDNodeInContext(gallivm->context, NULL, 0);
}

static void declare_streamout_params(struct si_shader_context *ctx,
                                     struct pipe_stream_output_info *so,
                                     LLVMTypeRef *params, LLVMTypeRef i32,
                                     unsigned *num_params)
{
        int i;

        /* Streamout SGPRs. */
        if (so->num_outputs) {
                if (ctx->type != PIPE_SHADER_TESS_EVAL)
                        params[ctx->param_streamout_config = (*num_params)++] = i32;
                else
                        ctx->param_streamout_config = ctx->param_tess_offchip;

                params[ctx->param_streamout_write_index = (*num_params)++] = i32;
        }
        /* A streamout buffer offset is loaded if the stride is non-zero. */
        for (i = 0; i < 4; i++) {
                if (!so->stride[i])
                        continue;

                params[ctx->param_streamout_offset[i] = (*num_params)++] = i32;
        }
}

static unsigned llvm_get_type_size(LLVMTypeRef type)
{
        LLVMTypeKind kind = LLVMGetTypeKind(type);

        switch (kind) {
        case LLVMIntegerTypeKind:
                return LLVMGetIntTypeWidth(type) / 8;
        case LLVMFloatTypeKind:
                return 4;
        case LLVMPointerTypeKind:
                return 8;
        case LLVMVectorTypeKind:
                return LLVMGetVectorSize(type) *
                       llvm_get_type_size(LLVMGetElementType(type));
        default:
                assert(0);
                return 0;
        }
}

static void declare_tess_lds(struct si_shader_context *ctx)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMTypeRef i32 = ctx->radeon_bld.soa.bld_base.uint_bld.elem_type;
        unsigned lds_size = ctx->screen->b.chip_class >= CIK ? 65536 : 32768;

        /* The actual size is computed outside of the shader to reduce
         * the number of shader variants. */
        ctx->lds =
                LLVMAddGlobalInAddressSpace(gallivm->module,
                                            LLVMArrayType(i32, lds_size / 4),
                                            "tess_lds",
                                            LOCAL_ADDR_SPACE);
}

static void create_function(struct si_shader_context *ctx)
{
        struct lp_build_tgsi_context *bld_base = &ctx->radeon_bld.soa.bld_base;
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        struct si_shader *shader = ctx->shader;
        LLVMTypeRef params[SI_NUM_PARAMS + SI_NUM_VERTEX_BUFFERS], v3i32;
        LLVMTypeRef returns[16+32*4];
        unsigned i, last_array_pointer, last_sgpr, num_params, num_return_sgprs;
        unsigned num_returns = 0;

        v3i32 = LLVMVectorType(ctx->i32, 3);

        params[SI_PARAM_RW_BUFFERS] = const_array(ctx->v16i8, SI_NUM_RW_BUFFERS);
        params[SI_PARAM_CONST_BUFFERS] = const_array(ctx->v16i8, SI_NUM_CONST_BUFFERS);
        params[SI_PARAM_SAMPLERS] = const_array(ctx->v8i32, SI_NUM_SAMPLERS);
        params[SI_PARAM_IMAGES] = const_array(ctx->v8i32, SI_NUM_IMAGES);
        params[SI_PARAM_SHADER_BUFFERS] = const_array(ctx->v4i32, SI_NUM_SHADER_BUFFERS);
        last_array_pointer = SI_PARAM_SHADER_BUFFERS;

        switch (ctx->type) {
        case PIPE_SHADER_VERTEX:
                params[SI_PARAM_VERTEX_BUFFERS] = const_array(ctx->v16i8, SI_NUM_VERTEX_BUFFERS);
                last_array_pointer = SI_PARAM_VERTEX_BUFFERS;
                params[SI_PARAM_BASE_VERTEX] = ctx->i32;
                params[SI_PARAM_START_INSTANCE] = ctx->i32;
                num_params = SI_PARAM_START_INSTANCE+1;

                if (shader->key.vs.as_es) {
                        params[ctx->param_es2gs_offset = num_params++] = ctx->i32;
                } else if (shader->key.vs.as_ls) {
                        params[SI_PARAM_LS_OUT_LAYOUT] = ctx->i32;
                        num_params = SI_PARAM_LS_OUT_LAYOUT+1;
                } else {
                        if (ctx->is_gs_copy_shader) {
                                last_array_pointer = SI_PARAM_RW_BUFFERS;
                                num_params = SI_PARAM_RW_BUFFERS+1;
                        } else {
                                params[SI_PARAM_VS_STATE_BITS] = ctx->i32;
                                num_params = SI_PARAM_VS_STATE_BITS+1;
                        }

                        /* The locations of the other parameters are assigned dynamically. */
                        declare_streamout_params(ctx, &shader->selector->so,
                                                 params, ctx->i32, &num_params);
                }

                last_sgpr = num_params-1;

                /* VGPRs */
                params[ctx->param_vertex_id = num_params++] = ctx->i32;
                params[ctx->param_rel_auto_id = num_params++] = ctx->i32;
                params[ctx->param_vs_prim_id = num_params++] = ctx->i32;
                params[ctx->param_instance_id = num_params++] = ctx->i32;

                if (!ctx->is_monolithic &&
                    !ctx->is_gs_copy_shader) {
                        /* Vertex load indices. */
                        ctx->param_vertex_index0 = num_params;

                        for (i = 0; i < shader->selector->info.num_inputs; i++)
                                params[num_params++] = ctx->i32;

                        /* PrimitiveID output. */
                        if (!shader->key.vs.as_es && !shader->key.vs.as_ls)
                                for (i = 0; i <= VS_EPILOG_PRIMID_LOC; i++)
                                        returns[num_returns++] = ctx->f32;
                }
                break;

        case PIPE_SHADER_TESS_CTRL:
                params[SI_PARAM_TCS_OFFCHIP_LAYOUT] = ctx->i32;
                params[SI_PARAM_TCS_OUT_OFFSETS] = ctx->i32;
                params[SI_PARAM_TCS_OUT_LAYOUT] = ctx->i32;
                params[SI_PARAM_TCS_IN_LAYOUT] = ctx->i32;
                params[ctx->param_oc_lds = SI_PARAM_TCS_OC_LDS] = ctx->i32;
                params[SI_PARAM_TESS_FACTOR_OFFSET] = ctx->i32;
                last_sgpr = SI_PARAM_TESS_FACTOR_OFFSET;

                /* VGPRs */
                params[SI_PARAM_PATCH_ID] = ctx->i32;
                params[SI_PARAM_REL_IDS] = ctx->i32;
                num_params = SI_PARAM_REL_IDS+1;

                if (!ctx->is_monolithic) {
                        /* SI_PARAM_TCS_OC_LDS and PARAM_TESS_FACTOR_OFFSET are
                         * placed after the user SGPRs.
                         */
                        for (i = 0; i < SI_TCS_NUM_USER_SGPR + 2; i++)
                                returns[num_returns++] = ctx->i32; /* SGPRs */

                        for (i = 0; i < 3; i++)
                                returns[num_returns++] = ctx->f32; /* VGPRs */
                }
                break;

        case PIPE_SHADER_TESS_EVAL:
                params[SI_PARAM_TCS_OFFCHIP_LAYOUT] = ctx->i32;
                num_params = SI_PARAM_TCS_OFFCHIP_LAYOUT+1;

                if (shader->key.tes.as_es) {
                        params[ctx->param_oc_lds = num_params++] = ctx->i32;
                        params[ctx->param_tess_offchip = num_params++] = ctx->i32;
                        params[ctx->param_es2gs_offset = num_params++] = ctx->i32;
                } else {
                        params[ctx->param_tess_offchip = num_params++] = ctx->i32;
                        declare_streamout_params(ctx, &shader->selector->so,
                                                 params, ctx->i32, &num_params);
                        params[ctx->param_oc_lds = num_params++] = ctx->i32;
                }
                last_sgpr = num_params - 1;

                /* VGPRs */
                params[ctx->param_tes_u = num_params++] = ctx->f32;
                params[ctx->param_tes_v = num_params++] = ctx->f32;
                params[ctx->param_tes_rel_patch_id = num_params++] = ctx->i32;
                params[ctx->param_tes_patch_id = num_params++] = ctx->i32;

                /* PrimitiveID output. */
                if (!ctx->is_monolithic && !shader->key.tes.as_es)
                        for (i = 0; i <= VS_EPILOG_PRIMID_LOC; i++)
                                returns[num_returns++] = ctx->f32;
                break;

        case PIPE_SHADER_GEOMETRY:
                params[SI_PARAM_GS2VS_OFFSET] = ctx->i32;
                params[SI_PARAM_GS_WAVE_ID] = ctx->i32;
                last_sgpr = SI_PARAM_GS_WAVE_ID;

                /* VGPRs */
                params[SI_PARAM_VTX0_OFFSET] = ctx->i32;
                params[SI_PARAM_VTX1_OFFSET] = ctx->i32;
                params[SI_PARAM_PRIMITIVE_ID] = ctx->i32;
                params[SI_PARAM_VTX2_OFFSET] = ctx->i32;
                params[SI_PARAM_VTX3_OFFSET] = ctx->i32;
                params[SI_PARAM_VTX4_OFFSET] = ctx->i32;
                params[SI_PARAM_VTX5_OFFSET] = ctx->i32;
                params[SI_PARAM_GS_INSTANCE_ID] = ctx->i32;
                num_params = SI_PARAM_GS_INSTANCE_ID+1;
                break;

        case PIPE_SHADER_FRAGMENT:
                params[SI_PARAM_ALPHA_REF] = ctx->f32;
                params[SI_PARAM_PRIM_MASK] = ctx->i32;
                last_sgpr = SI_PARAM_PRIM_MASK;
                params[SI_PARAM_PERSP_SAMPLE] = ctx->v2i32;
                params[SI_PARAM_PERSP_CENTER] = ctx->v2i32;
                params[SI_PARAM_PERSP_CENTROID] = ctx->v2i32;
                params[SI_PARAM_PERSP_PULL_MODEL] = v3i32;
                params[SI_PARAM_LINEAR_SAMPLE] = ctx->v2i32;
                params[SI_PARAM_LINEAR_CENTER] = ctx->v2i32;
                params[SI_PARAM_LINEAR_CENTROID] = ctx->v2i32;
                params[SI_PARAM_LINE_STIPPLE_TEX] = ctx->f32;
                params[SI_PARAM_POS_X_FLOAT] = ctx->f32;
                params[SI_PARAM_POS_Y_FLOAT] = ctx->f32;
                params[SI_PARAM_POS_Z_FLOAT] = ctx->f32;
                params[SI_PARAM_POS_W_FLOAT] = ctx->f32;
                params[SI_PARAM_FRONT_FACE] = ctx->i32;
                params[SI_PARAM_ANCILLARY] = ctx->i32;
                params[SI_PARAM_SAMPLE_COVERAGE] = ctx->f32;
                params[SI_PARAM_POS_FIXED_PT] = ctx->i32;
                num_params = SI_PARAM_POS_FIXED_PT+1;

                if (!ctx->is_monolithic) {
                        /* Color inputs from the prolog. */
                        if (shader->selector->info.colors_read) {
                                unsigned num_color_elements =
                                        util_bitcount(shader->selector->info.colors_read);

                                assert(num_params + num_color_elements <= ARRAY_SIZE(params));
                                for (i = 0; i < num_color_elements; i++)
                                        params[num_params++] = ctx->f32;
                        }

                        /* Outputs for the epilog. */
                        num_return_sgprs = SI_SGPR_ALPHA_REF + 1;
                        num_returns =
                                num_return_sgprs +
                                util_bitcount(shader->selector->info.colors_written) * 4 +
                                shader->selector->info.writes_z +
                                shader->selector->info.writes_stencil +
                                shader->selector->info.writes_samplemask +
                                1 /* SampleMaskIn */;

                        num_returns = MAX2(num_returns,
                                           num_return_sgprs +
                                           PS_EPILOG_SAMPLEMASK_MIN_LOC + 1);

                        for (i = 0; i < num_return_sgprs; i++)
                                returns[i] = ctx->i32;
                        for (; i < num_returns; i++)
                                returns[i] = ctx->f32;
                }
                break;

        case PIPE_SHADER_COMPUTE:
                params[SI_PARAM_GRID_SIZE] = v3i32;
                params[SI_PARAM_BLOCK_ID] = v3i32;
                last_sgpr = SI_PARAM_BLOCK_ID;

                params[SI_PARAM_THREAD_ID] = v3i32;
                num_params = SI_PARAM_THREAD_ID + 1;
                break;
        default:
                assert(0 && "unimplemented shader");
                return;
        }

        assert(num_params <= ARRAY_SIZE(params));

        si_create_function(ctx, returns, num_returns, params,
                           num_params, last_array_pointer, last_sgpr);

        /* Reserve register locations for VGPR inputs the PS prolog may need. */
        if (ctx->type == PIPE_SHADER_FRAGMENT &&
            !ctx->is_monolithic) {
                radeon_llvm_add_attribute(ctx->radeon_bld.main_fn,
                                          "InitialPSInputAddr",
                                          S_0286D0_PERSP_SAMPLE_ENA(1) |
                                          S_0286D0_PERSP_CENTER_ENA(1) |
                                          S_0286D0_PERSP_CENTROID_ENA(1) |
                                          S_0286D0_LINEAR_SAMPLE_ENA(1) |
                                          S_0286D0_LINEAR_CENTER_ENA(1) |
                                          S_0286D0_LINEAR_CENTROID_ENA(1) |
                                          S_0286D0_FRONT_FACE_ENA(1) |
                                          S_0286D0_POS_FIXED_PT_ENA(1));
        } else if (ctx->type == PIPE_SHADER_COMPUTE) {
                const unsigned *properties = shader->selector->info.properties;
                unsigned max_work_group_size =
                               properties[TGSI_PROPERTY_CS_FIXED_BLOCK_WIDTH] *
                               properties[TGSI_PROPERTY_CS_FIXED_BLOCK_HEIGHT] *
                               properties[TGSI_PROPERTY_CS_FIXED_BLOCK_DEPTH];

                assert(max_work_group_size);

                radeon_llvm_add_attribute(ctx->radeon_bld.main_fn,
                                          "amdgpu-max-work-group-size",
                                          max_work_group_size);
        }

        shader->info.num_input_sgprs = 0;
        shader->info.num_input_vgprs = 0;

        for (i = 0; i <= last_sgpr; ++i)
                shader->info.num_input_sgprs += llvm_get_type_size(params[i]) / 4;

        /* Unused fragment shader inputs are eliminated by the compiler,
         * so we don't know yet how many there will be.
         */
        if (ctx->type != PIPE_SHADER_FRAGMENT)
                for (; i < num_params; ++i)
                        shader->info.num_input_vgprs += llvm_get_type_size(params[i]) / 4;

        if (bld_base->info &&
            (bld_base->info->opcode_count[TGSI_OPCODE_DDX] > 0 ||
             bld_base->info->opcode_count[TGSI_OPCODE_DDY] > 0 ||
             bld_base->info->opcode_count[TGSI_OPCODE_DDX_FINE] > 0 ||
             bld_base->info->opcode_count[TGSI_OPCODE_DDY_FINE] > 0 ||
             bld_base->info->opcode_count[TGSI_OPCODE_INTERP_OFFSET] > 0 ||
             bld_base->info->opcode_count[TGSI_OPCODE_INTERP_SAMPLE] > 0))
                ctx->lds =
                        LLVMAddGlobalInAddressSpace(gallivm->module,
                                                    LLVMArrayType(ctx->i32, 64),
                                                    "ddxy_lds",
                                                    LOCAL_ADDR_SPACE);

        if ((ctx->type == PIPE_SHADER_VERTEX && shader->key.vs.as_ls) ||
            ctx->type == PIPE_SHADER_TESS_CTRL ||
            ctx->type == PIPE_SHADER_TESS_EVAL)
                declare_tess_lds(ctx);
}

static void preload_constants(struct si_shader_context *ctx)
{
        struct lp_build_tgsi_context *bld_base = &ctx->radeon_bld.soa.bld_base;
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        const struct tgsi_shader_info *info = bld_base->info;
        unsigned buf;
        LLVMValueRef ptr = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_CONST_BUFFERS);

        for (buf = 0; buf < SI_NUM_CONST_BUFFERS; buf++) {
                unsigned i, num_const = info->const_file_max[buf] + 1;

                if (num_const == 0)
                        continue;

                /* Allocate space for the constant values */
                ctx->constants[buf] = CALLOC(num_const * 4, sizeof(LLVMValueRef));

                /* Load the resource descriptor */
                ctx->const_buffers[buf] =
                        build_indexed_load_const(ctx, ptr, lp_build_const_int32(gallivm, buf));

                /* Load the constants, we rely on the code sinking to do the rest */
                for (i = 0; i < num_const * 4; ++i) {
                        ctx->constants[buf][i] =
                                buffer_load_const(gallivm->builder,
                                        ctx->const_buffers[buf],
                                        lp_build_const_int32(gallivm, i * 4),
                                        ctx->f32);
                }
        }
}

static void preload_shader_buffers(struct si_shader_context *ctx)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        LLVMValueRef ptr = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_SHADER_BUFFERS);
        int buf, maxbuf;

        maxbuf = MIN2(ctx->shader->selector->info.file_max[TGSI_FILE_BUFFER],
                      SI_NUM_SHADER_BUFFERS - 1);
        for (buf = 0; buf <= maxbuf; ++buf) {
                ctx->shader_buffers[buf] =
                        build_indexed_load_const(
                                ctx, ptr, lp_build_const_int32(gallivm, buf));
        }
}

static void preload_samplers(struct si_shader_context *ctx)
{
        struct lp_build_tgsi_context *bld_base = &ctx->radeon_bld.soa.bld_base;
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        const struct tgsi_shader_info *info = bld_base->info;
        unsigned i, num_samplers = info->file_max[TGSI_FILE_SAMPLER] + 1;
        LLVMValueRef offset;

        if (num_samplers == 0)
                return;

        /* Load the resources and samplers, we rely on the code sinking to do the rest */
        for (i = 0; i < num_samplers; ++i) {
                /* Resource */
                offset = lp_build_const_int32(gallivm, i);
                ctx->sampler_views[i] =
                        get_sampler_desc(ctx, offset, DESC_IMAGE);

                /* FMASK resource */
                if (info->is_msaa_sampler[i])
                        ctx->fmasks[i] =
                                get_sampler_desc(ctx, offset, DESC_FMASK);
                else {
                        ctx->sampler_states[i] =
                                get_sampler_desc(ctx, offset, DESC_SAMPLER);
                        ctx->sampler_states[i] =
                                sici_fix_sampler_aniso(ctx, ctx->sampler_views[i],
                                                       ctx->sampler_states[i]);
                }
        }
}

static void preload_images(struct si_shader_context *ctx)
{
        struct lp_build_tgsi_context *bld_base = &ctx->radeon_bld.soa.bld_base;
        struct tgsi_shader_info *info = &ctx->shader->selector->info;
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        unsigned num_images = bld_base->info->file_max[TGSI_FILE_IMAGE] + 1;
        LLVMValueRef res_ptr;
        unsigned i;

        if (num_images == 0)
                return;

        res_ptr = LLVMGetParam(ctx->radeon_bld.main_fn, SI_PARAM_IMAGES);

        for (i = 0; i < num_images; ++i) {
                /* Rely on LLVM to shrink the load for buffer resources. */
                LLVMValueRef rsrc =
                        build_indexed_load_const(ctx, res_ptr,
                                                 lp_build_const_int32(gallivm, i));

                if (info->images_writemask & (1 << i) &&
                    !(info->images_buffers & (1 << i)))
                        rsrc = force_dcc_off(ctx, rsrc);

                ctx->images[i] = rsrc;
        }
}

static void preload_streamout_buffers(struct si_shader_context *ctx)
{
        struct lp_build_tgsi_context *bld_base = &ctx->radeon_bld.soa.bld_base;
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        unsigned i;

        /* Streamout can only be used if the shader is compiled as VS. */
        if (!ctx->shader->selector->so.num_outputs ||
            (ctx->type == PIPE_SHADER_VERTEX &&
             (ctx->shader->key.vs.as_es ||
              ctx->shader->key.vs.as_ls)) ||
            (ctx->type == PIPE_SHADER_TESS_EVAL &&
             ctx->shader->key.tes.as_es))
                return;

        LLVMValueRef buf_ptr = LLVMGetParam(ctx->radeon_bld.main_fn,
                                            SI_PARAM_RW_BUFFERS);

        /* Load the resources, we rely on the code sinking to do the rest */
        for (i = 0; i < 4; ++i) {
                if (ctx->shader->selector->so.stride[i]) {
                        LLVMValueRef offset = lp_build_const_int32(gallivm,
                                                                   SI_VS_STREAMOUT_BUF0 + i);

                        ctx->so_buffers[i] = build_indexed_load_const(ctx, buf_ptr, offset);
                }
        }
}

/**
 * Load ESGS and GSVS ring buffer resource descriptors and save the variables
 * for later use.
 */
static void preload_ring_buffers(struct si_shader_context *ctx)
{
        struct gallivm_state *gallivm =
                ctx->radeon_bld.soa.bld_base.base.gallivm;

        LLVMValueRef buf_ptr = LLVMGetParam(ctx->radeon_bld.main_fn,
                                            SI_PARAM_RW_BUFFERS);

        if ((ctx->type == PIPE_SHADER_VERTEX &&
             ctx->shader->key.vs.as_es) ||
            (ctx->type == PIPE_SHADER_TESS_EVAL &&
             ctx->shader->key.tes.as_es) ||
            ctx->type == PIPE_SHADER_GEOMETRY) {
                unsigned ring =
                        ctx->type == PIPE_SHADER_GEOMETRY ? SI_GS_RING_ESGS
                                                             : SI_ES_RING_ESGS;
                LLVMValueRef offset = lp_build_const_int32(gallivm, ring);

                ctx->esgs_ring =
                        build_indexed_load_const(ctx, buf_ptr, offset);
        }

        if (ctx->is_gs_copy_shader) {
                LLVMValueRef offset = lp_build_const_int32(gallivm, SI_VS_RING_GSVS);

                ctx->gsvs_ring[0] =
                        build_indexed_load_const(ctx, buf_ptr, offset);
        }
        if (ctx->type == PIPE_SHADER_GEOMETRY) {
                int i;
                for (i = 0; i < 4; i++) {
                        LLVMValueRef offset = lp_build_const_int32(gallivm, SI_GS_RING_GSVS0 + i);

                        ctx->gsvs_ring[i] =
                                build_indexed_load_const(ctx, buf_ptr, offset);
                }
        }
}

static void si_llvm_emit_polygon_stipple(struct si_shader_context *ctx,
                                         LLVMValueRef param_rw_buffers,
                                         unsigned param_pos_fixed_pt)
{
        struct lp_build_tgsi_context *bld_base =
                &ctx->radeon_bld.soa.bld_base;
        struct gallivm_state *gallivm = bld_base->base.gallivm;
        LLVMBuilderRef builder = gallivm->builder;
        LLVMValueRef slot, desc, offset, row, bit, address[2];

        /* Use the fixed-point gl_FragCoord input.
         * Since the stipple pattern is 32x32 and it repeats, just get 5 bits
         * per coordinate to get the repeating effect.
         */
        address[0] = unpack_param(ctx, param_pos_fixed_pt, 0, 5);
        address[1] = unpack_param(ctx, param_pos_fixed_pt, 16, 5);

        /* Load the buffer descriptor. */
        slot = lp_build_const_int32(gallivm, SI_PS_CONST_POLY_STIPPLE);
        desc = build_indexed_load_const(ctx, param_rw_buffers, slot);

        /* The stipple pattern is 32x32, each row has 32 bits. */
        offset = LLVMBuildMul(builder, address[1],
                              LLVMConstInt(ctx->i32, 4, 0), "");
        row = buffer_load_const(builder, desc, offset, ctx->i32);
        bit = LLVMBuildLShr(builder, row, address[0], "");
        bit = LLVMBuildTrunc(builder, bit, ctx->i1, "");

        /* The intrinsic kills the thread if arg < 0. */
        bit = LLVMBuildSelect(builder, bit, LLVMConstReal(ctx->f32, 0),
                              LLVMConstReal(ctx->f32, -1), "");
        lp_build_intrinsic(builder, "llvm.AMDGPU.kill", ctx->voidt, &bit, 1, 0);
}

void si_shader_binary_read_config(struct radeon_shader_binary *binary,
                                  struct si_shader_config *conf,
                                  unsigned symbol_offset)
{
        unsigned i;
        const unsigned char *config =
                radeon_shader_binary_config_start(binary, symbol_offset);
        bool really_needs_scratch = false;

        /* LLVM adds SGPR spills to the scratch size.
         * Find out if we really need the scratch buffer.
         */
        for (i = 0; i < binary->reloc_count; i++) {
                const struct radeon_shader_reloc *reloc = &binary->relocs[i];

                if (!strcmp(scratch_rsrc_dword0_symbol, reloc->name) ||
                    !strcmp(scratch_rsrc_dword1_symbol, reloc->name)) {
                        really_needs_scratch = true;
                        break;
                }
        }

        /* XXX: We may be able to emit some of these values directly rather than
         * extracting fields to be emitted later.
         */

        for (i = 0; i < binary->config_size_per_symbol; i+= 8) {
                unsigned reg = util_le32_to_cpu(*(uint32_t*)(config + i));
                unsigned value = util_le32_to_cpu(*(uint32_t*)(config + i + 4));
                switch (reg) {
                case R_00B028_SPI_SHADER_PGM_RSRC1_PS:
                case R_00B128_SPI_SHADER_PGM_RSRC1_VS:
                case R_00B228_SPI_SHADER_PGM_RSRC1_GS:
                case R_00B848_COMPUTE_PGM_RSRC1:
                        conf->num_sgprs = MAX2(conf->num_sgprs, (G_00B028_SGPRS(value) + 1) * 8);
                        conf->num_vgprs = MAX2(conf->num_vgprs, (G_00B028_VGPRS(value) + 1) * 4);
                        conf->float_mode =  G_00B028_FLOAT_MODE(value);
                        conf->rsrc1 = value;
                        break;
                case R_00B02C_SPI_SHADER_PGM_RSRC2_PS:
                        conf->lds_size = MAX2(conf->lds_size, G_00B02C_EXTRA_LDS_SIZE(value));
                        break;
                case R_00B84C_COMPUTE_PGM_RSRC2:
                        conf->lds_size = MAX2(conf->lds_size, G_00B84C_LDS_SIZE(value));
                        conf->rsrc2 = value;
                        break;
                case R_0286CC_SPI_PS_INPUT_ENA:
                        conf->spi_ps_input_ena = value;
                        break;
                case R_0286D0_SPI_PS_INPUT_ADDR:
                        conf->spi_ps_input_addr = value;
                        break;
                case R_0286E8_SPI_TMPRING_SIZE:
                case R_00B860_COMPUTE_TMPRING_SIZE:
                        /* WAVESIZE is in units of 256 dwords. */
                        if (really_needs_scratch)
                                conf->scratch_bytes_per_wave =
                                        G_00B860_WAVESIZE(value) * 256 * 4;
                        break;
                default:
                        {
                                static bool printed;

                                if (!printed) {
                                        fprintf(stderr, "Warning: LLVM emitted unknown "
                                                "config register: 0x%x\n", reg);
                                        printed = true;
                                }
                        }
                        break;
                }

                if (!conf->spi_ps_input_addr)
                        conf->spi_ps_input_addr = conf->spi_ps_input_ena;
        }
}

void si_shader_apply_scratch_relocs(struct si_context *sctx,
                        struct si_shader *shader,
                        struct si_shader_config *config,
                        uint64_t scratch_va)
{
        unsigned i;
        uint32_t scratch_rsrc_dword0 = scratch_va;
        uint32_t scratch_rsrc_dword1 =
                S_008F04_BASE_ADDRESS_HI(scratch_va >> 32);

        /* Enable scratch coalescing if LLVM sets ELEMENT_SIZE & INDEX_STRIDE
         * correctly.
         */
        if (HAVE_LLVM >= 0x0309)
                scratch_rsrc_dword1 |= S_008F04_SWIZZLE_ENABLE(1);
        else
                scratch_rsrc_dword1 |=
                        S_008F04_STRIDE(config->scratch_bytes_per_wave / 64);

        for (i = 0 ; i < shader->binary.reloc_count; i++) {
                const struct radeon_shader_reloc *reloc =
                                        &shader->binary.relocs[i];
                if (!strcmp(scratch_rsrc_dword0_symbol, reloc->name)) {
                        util_memcpy_cpu_to_le32(shader->binary.code + reloc->offset,
                        &scratch_rsrc_dword0, 4);
                } else if (!strcmp(scratch_rsrc_dword1_symbol, reloc->name)) {
                        util_memcpy_cpu_to_le32(shader->binary.code + reloc->offset,
                        &scratch_rsrc_dword1, 4);
                }
        }
}

static unsigned si_get_shader_binary_size(struct si_shader *shader)
{
        unsigned size = shader->binary.code_size;

        if (shader->prolog)
                size += shader->prolog->binary.code_size;
        if (shader->epilog)
                size += shader->epilog->binary.code_size;
        return size;
}

int si_shader_binary_upload(struct si_screen *sscreen, struct si_shader *shader)
{
        const struct radeon_shader_binary *prolog =
                shader->prolog ? &shader->prolog->binary : NULL;
        const struct radeon_shader_binary *epilog =
                shader->epilog ? &shader->epilog->binary : NULL;
        const struct radeon_shader_binary *mainb = &shader->binary;
        unsigned bo_size = si_get_shader_binary_size(shader) +
                           (!epilog ? mainb->rodata_size : 0);
        unsigned char *ptr;

        assert(!prolog || !prolog->rodata_size);
        assert((!prolog && !epilog) || !mainb->rodata_size);
        assert(!epilog || !epilog->rodata_size);

        r600_resource_reference(&shader->bo, NULL);
        shader->bo = si_resource_create_custom(&sscreen->b.b,
                                               PIPE_USAGE_IMMUTABLE,
                                               bo_size);
        if (!shader->bo)
                return -ENOMEM;

        /* Upload. */
        ptr = sscreen->b.ws->buffer_map(shader->bo->buf, NULL,
                                        PIPE_TRANSFER_READ_WRITE);

        if (prolog) {
                util_memcpy_cpu_to_le32(ptr, prolog->code, prolog->code_size);
                ptr += prolog->code_size;
        }

        util_memcpy_cpu_to_le32(ptr, mainb->code, mainb->code_size);
        ptr += mainb->code_size;

        if (epilog)
                util_memcpy_cpu_to_le32(ptr, epilog->code, epilog->code_size);
        else if (mainb->rodata_size > 0)
                util_memcpy_cpu_to_le32(ptr, mainb->rodata, mainb->rodata_size);

        sscreen->b.ws->buffer_unmap(shader->bo->buf);
        return 0;
}

static void si_shader_dump_disassembly(const struct radeon_shader_binary *binary,
                                       struct pipe_debug_callback *debug,
                                       const char *name, FILE *file)
{
        char *line, *p;
        unsigned i, count;

        if (binary->disasm_string) {
                fprintf(file, "Shader %s disassembly:\n", name);
                fprintf(file, "%s", binary->disasm_string);

                if (debug && debug->debug_message) {
                        /* Very long debug messages are cut off, so send the
                         * disassembly one line at a time. This causes more
                         * overhead, but on the plus side it simplifies
                         * parsing of resulting logs.
                         */
                        pipe_debug_message(debug, SHADER_INFO,
                                           "Shader Disassembly Begin");

                        line = binary->disasm_string;
                        while (*line) {
                                p = util_strchrnul(line, '\n');
                                count = p - line;

                                if (count) {
                                        pipe_debug_message(debug, SHADER_INFO,
                                                           "%.*s", count, line);
                                }

                                if (!*p)
                                        break;
                                line = p + 1;
                        }

                        pipe_debug_message(debug, SHADER_INFO,
                                           "Shader Disassembly End");
                }
        } else {
                fprintf(file, "Shader %s binary:\n", name);
                for (i = 0; i < binary->code_size; i += 4) {
                        fprintf(file, "@0x%x: %02x%02x%02x%02x\n", i,
                                binary->code[i + 3], binary->code[i + 2],
                                binary->code[i + 1], binary->code[i]);
                }
        }
}

static void si_shader_dump_stats(struct si_screen *sscreen,
                                 struct si_shader_config *conf,
                                 unsigned num_inputs,
                                 unsigned code_size,
                                 struct pipe_debug_callback *debug,
                                 unsigned processor,
                                 FILE *file)
{
        unsigned lds_increment = sscreen->b.chip_class >= CIK ? 512 : 256;
        unsigned lds_per_wave = 0;
        unsigned max_simd_waves = 10;
        /* Assuming SGPRs aren't spilled. */
        unsigned spilled_vgprs = conf->scratch_bytes_per_wave / 64 / 4;

        /* Compute LDS usage for PS. */
        if (processor == PIPE_SHADER_FRAGMENT) {
                /* The minimum usage per wave is (num_inputs * 48). The maximum
                 * usage is (num_inputs * 48 * 16).
                 * We can get anything in between and it varies between waves.
                 *
                 * The 48 bytes per input for a single primitive is equal to
                 * 4 bytes/component * 4 components/input * 3 points.
                 *
                 * Other stages don't know the size at compile time or don't
                 * allocate LDS per wave, but instead they do it per thread group.
                 */
                lds_per_wave = conf->lds_size * lds_increment +
                               align(num_inputs * 48, lds_increment);
        }

        /* Compute the per-SIMD wave counts. */
        if (conf->num_sgprs) {
                if (sscreen->b.chip_class >= VI)
                        max_simd_waves = MIN2(max_simd_waves, 800 / conf->num_sgprs);
                else
                        max_simd_waves = MIN2(max_simd_waves, 512 / conf->num_sgprs);
        }

        if (conf->num_vgprs)
                max_simd_waves = MIN2(max_simd_waves, 256 / conf->num_vgprs);

        /* LDS is 64KB per CU (4 SIMDs), divided into 16KB blocks per SIMD
         * that PS can use.
         */
        if (lds_per_wave)
                max_simd_waves = MIN2(max_simd_waves, 16384 / lds_per_wave);

        if (file != stderr ||
            r600_can_dump_shader(&sscreen->b, processor)) {
                if (processor == PIPE_SHADER_FRAGMENT) {
                        fprintf(file, "*** SHADER CONFIG ***\n"
                                "SPI_PS_INPUT_ADDR = 0x%04x\n"
                                "SPI_PS_INPUT_ENA  = 0x%04x\n",
                                conf->spi_ps_input_addr, conf->spi_ps_input_ena);
                }

                fprintf(file, "*** SHADER STATS ***\n"
                        "SGPRS: %d\n"
                        "VGPRS: %d\n"
                        "Spilled VGPRs: %d\n"
                        "Code Size: %d bytes\n"
                        "LDS: %d blocks\n"
                        "Scratch: %d bytes per wave\n"
                        "Max Waves: %d\n"
                        "********************\n",
                        conf->num_sgprs, conf->num_vgprs, spilled_vgprs, code_size,
                        conf->lds_size, conf->scratch_bytes_per_wave,
                        max_simd_waves);
        }

        pipe_debug_message(debug, SHADER_INFO,
                           "Shader Stats: SGPRS: %d VGPRS: %d Code Size: %d "
                           "LDS: %d Scratch: %d Max Waves: %d Spilled VGPRs: %d",
                           conf->num_sgprs, conf->num_vgprs, code_size,
                           conf->lds_size, conf->scratch_bytes_per_wave,
                           max_simd_waves, spilled_vgprs);
}

static const char *si_get_shader_name(struct si_shader *shader,
                                      unsigned processor)
{
        switch (processor) {
        case PIPE_SHADER_VERTEX:
                if (shader->key.vs.as_es)
                        return "Vertex Shader as ES";
                else if (shader->key.vs.as_ls)
                        return "Vertex Shader as LS";
                else
                        return "Vertex Shader as VS";
        case PIPE_SHADER_TESS_CTRL:
                return "Tessellation Control Shader";
        case PIPE_SHADER_TESS_EVAL:
                if (shader->key.tes.as_es)
                        return "Tessellation Evaluation Shader as ES";
                else
                        return "Tessellation Evaluation Shader as VS";
        case PIPE_SHADER_GEOMETRY:
                if (shader->gs_copy_shader == NULL)
                        return "GS Copy Shader as VS";
                else
                        return "Geometry Shader";
        case PIPE_SHADER_FRAGMENT:
                return "Pixel Shader";
        case PIPE_SHADER_COMPUTE:
                return "Compute Shader";
        default:
                return "Unknown Shader";
        }
}

void si_shader_dump(struct si_screen *sscreen, struct si_shader *shader,
                    struct pipe_debug_callback *debug, unsigned processor,
                    FILE *file)
{
        if (file != stderr ||
            (r600_can_dump_shader(&sscreen->b, processor) &&
             !(sscreen->b.debug_flags & DBG_NO_ASM))) {
                fprintf(file, "\n%s:\n", si_get_shader_name(shader, processor));

                if (shader->prolog)
                        si_shader_dump_disassembly(&shader->prolog->binary,
                                                   debug, "prolog", file);

                si_shader_dump_disassembly(&shader->binary, debug, "main", file);

                if (shader->epilog)
                        si_shader_dump_disassembly(&shader->epilog->binary,
                                                   debug, "epilog", file);
                fprintf(file, "\n");
        }

        si_shader_dump_stats(sscreen, &shader->config,
                             shader->selector ? shader->selector->info.num_inputs : 0,
                             si_get_shader_binary_size(shader), debug, processor,
                             file);
}

int si_compile_llvm(struct si_screen *sscreen,
                    struct radeon_shader_binary *binary,
                    struct si_shader_config *conf,
                    LLVMTargetMachineRef tm,
                    LLVMModuleRef mod,
                    struct pipe_debug_callback *debug,
                    unsigned processor,
                    const char *name)
{
        int r = 0;
        unsigned count = p_atomic_inc_return(&sscreen->b.num_compilations);

        if (r600_can_dump_shader(&sscreen->b, processor)) {
                fprintf(stderr, "radeonsi: Compiling shader %d\n", count);

                if (!(sscreen->b.debug_flags & (DBG_NO_IR | DBG_PREOPT_IR))) {
                        fprintf(stderr, "%s LLVM IR:\n\n", name);
                        LLVMDumpModule(mod);
                        fprintf(stderr, "\n");
                }
        }

        if (!si_replace_shader(count, binary)) {
                r = radeon_llvm_compile(mod, binary, tm, debug);
                if (r)
                        return r;
        }

        si_shader_binary_read_config(binary, conf, 0);

        /* Enable 64-bit and 16-bit denormals, because there is no performance
         * cost.
         *
         * If denormals are enabled, all floating-point output modifiers are
         * ignored.
         *
         * Don't enable denormals for 32-bit floats, because:
         * - Floating-point output modifiers would be ignored by the hw.
         * - Some opcodes don't support denormals, such as v_mad_f32. We would
         *   have to stop using those.
         * - SI & CI would be very slow.
         */
        conf->float_mode |= V_00B028_FP_64_DENORMS;

        FREE(binary->config);
        FREE(binary->global_symbol_offsets);
        binary->config = NULL;
        binary->global_symbol_offsets = NULL;

        /* Some shaders can't have rodata because their binaries can be
         * concatenated.
         */
        if (binary->rodata_size &&
            (processor == PIPE_SHADER_VERTEX ||
             processor == PIPE_SHADER_TESS_CTRL ||
             processor == PIPE_SHADER_TESS_EVAL ||
             processor == PIPE_SHADER_FRAGMENT)) {
                fprintf(stderr, "radeonsi: The shader can't have rodata.");
                return -EINVAL;
        }

        return r;
}

static void si_llvm_build_ret(struct si_shader_context *ctx, LLVMValueRef ret)
{
        if (LLVMGetTypeKind(LLVMTypeOf(ret)) == LLVMVoidTypeKind)
                LLVMBuildRetVoid(ctx->radeon_bld.gallivm.builder);
        else
                LLVMBuildRet(ctx->radeon_bld.gallivm.builder, ret);
}

/* Generate code for the hardware VS shader stage to go with a geometry shader */
static int si_generate_gs_copy_shader(struct si_screen *sscreen,
                                      struct si_shader_context *ctx,
                                      struct si_shader *gs,
                                      struct pipe_debug_callback *debug)
{
        struct gallivm_state *gallivm = &ctx->radeon_bld.gallivm;
        struct lp_build_tgsi_context *bld_base = &ctx->radeon_bld.soa.bld_base;
        struct lp_build_context *uint = &bld_base->uint_bld;
        struct si_shader_output_values *outputs;
        struct tgsi_shader_info *gsinfo = &gs->selector->info;
        LLVMValueRef args[9];
        int i, r;

        outputs = MALLOC(gsinfo->num_outputs * sizeof(outputs[0]));

        si_init_shader_ctx(ctx, sscreen, ctx->shader, ctx->tm);
        ctx->type = PIPE_SHADER_VERTEX;
        ctx->is_gs_copy_shader = true;

        create_meta_data(ctx);
        create_function(ctx);
        preload_streamout_buffers(ctx);
        preload_ring_buffers(ctx);

        args[0] = ctx->gsvs_ring[0];
        args[1] = lp_build_mul_imm(uint,
                                   LLVMGetParam(ctx->radeon_bld.main_fn,
                                                ctx->param_vertex_id),
                                   4);
        args[3] = uint->zero;
        args[4] = uint->one;  /* OFFEN */
        args[5] = uint->zero; /* IDXEN */
        args[6] = uint->one;  /* GLC */
        args[7] = uint->one;  /* SLC */
        args[8] = uint->zero; /* TFE */

        /* Fetch vertex data from GSVS ring */
        for (i = 0; i < gsinfo->num_outputs; ++i) {
                unsigned chan;

                outputs[i].name = gsinfo->output_semantic_name[i];
                outputs[i].sid = gsinfo->output_semantic_index[i];

                for (chan = 0; chan < 4; chan++) {
                        args[2] = lp_build_const_int32(gallivm,
                                                       (i * 4 + chan) *
                                                       gs->selector->gs_max_out_vertices * 16 * 4);

                        outputs[i].values[chan] =
                                LLVMBuildBitCast(gallivm->builder,
                                                 lp_build_intrinsic(gallivm->builder,
                                                                 "llvm.SI.buffer.load.dword.i32.i32",
                                                                 ctx->i32, args, 9,
                                                                 LLVMReadOnlyAttribute | LLVMNoUnwindAttribute),
                                                 ctx->f32, "");
                }
        }

        si_llvm_export_vs(bld_base, outputs, gsinfo->num_outputs);

        LLVMBuildRetVoid(gallivm->builder);

        /* Dump LLVM IR before any optimization passes */
        if (sscreen->b.debug_flags & DBG_PREOPT_IR &&
            r600_can_dump_shader(&sscreen->b, PIPE_SHADER_GEOMETRY))
                LLVMDumpModule(bld_base->base.gallivm->module);

        radeon_llvm_finalize_module(&ctx->radeon_bld);

        r = si_compile_llvm(sscreen, &ctx->shader->binary,
                            &ctx->shader->config, ctx->tm,
                            bld_base->base.gallivm->module,
                            debug, PIPE_SHADER_GEOMETRY,
                            "GS Copy Shader");
        if (!r) {
                if (r600_can_dump_shader(&sscreen->b, PIPE_SHADER_GEOMETRY))
                        fprintf(stderr, "GS Copy Shader:\n");
                si_shader_dump(sscreen, ctx->shader, debug,
                               PIPE_SHADER_GEOMETRY, stderr);
                r = si_shader_binary_upload(sscreen, ctx->shader);
        }

        radeon_llvm_dispose(&ctx->radeon_bld);

        FREE(outputs);
        return r;
}

void si_dump_shader_key(unsigned shader, union si_shader_key *key, FILE *f)
{
        int i;

        fprintf(f, "SHADER KEY\n");

        switch (shader) {
        case PIPE_SHADER_VERTEX:
                fprintf(f, "  instance_divisors = {");
                for (i = 0; i < ARRAY_SIZE(key->vs.prolog.instance_divisors); i++)
                        fprintf(f, !i ? "%u" : ", %u",
                                key->vs.prolog.instance_divisors[i]);
                fprintf(f, "}\n");
                fprintf(f, "  as_es = %u\n", key->vs.as_es);
                fprintf(f, "  as_ls = %u\n", key->vs.as_ls);
                fprintf(f, "  export_prim_id = %u\n", key->vs.epilog.export_prim_id);
                break;

        case PIPE_SHADER_TESS_CTRL:
                fprintf(f, "  prim_mode = %u\n", key->tcs.epilog.prim_mode);
                break;

        case PIPE_SHADER_TESS_EVAL:
                fprintf(f, "  as_es = %u\n", key->tes.as_es);
                fprintf(f, "  export_prim_id = %u\n", key->tes.epilog.export_prim_id);
                break;

        case PIPE_SHADER_GEOMETRY:
        case PIPE_SHADER_COMPUTE:
                break;

        case PIPE_SHADER_FRAGMENT:
                fprintf(f, "  prolog.color_two_side = %u\n", key->ps.prolog.color_two_side);
                fprintf(f, "  prolog.flatshade_colors = %u\n", key->ps.prolog.flatshade_colors);
                fprintf(f, "  prolog.poly_stipple = %u\n", key->ps.prolog.poly_stipple);
                fprintf(f, "  prolog.force_persp_sample_interp = %u\n", key->ps.prolog.force_persp_sample_interp);
                fprintf(f, "  prolog.force_linear_sample_interp = %u\n", key->ps.prolog.force_linear_sample_interp);
                fprintf(f, "  prolog.force_persp_center_interp = %u\n", key->ps.prolog.force_persp_center_interp);
                fprintf(f, "  prolog.force_linear_center_interp = %u\n", key->ps.prolog.force_linear_center_interp);
                fprintf(f, "  prolog.bc_optimize_for_persp = %u\n", key->ps.prolog.bc_optimize_for_persp);
                fprintf(f, "  prolog.bc_optimize_for_linear = %u\n", key->ps.prolog.bc_optimize_for_linear);
                fprintf(f, "  epilog.spi_shader_col_format = 0x%x\n", key->ps.epilog.spi_shader_col_format);
                fprintf(f, "  epilog.color_is_int8 = 0x%X\n", key->ps.epilog.color_is_int8);
                fprintf(f, "  epilog.last_cbuf = %u\n", key->ps.epilog.last_cbuf);
                fprintf(f, "  epilog.alpha_func = %u\n", key->ps.epilog.alpha_func);
                fprintf(f, "  epilog.alpha_to_one = %u\n", key->ps.epilog.alpha_to_one);
                fprintf(f, "  epilog.poly_line_smoothing = %u\n", key->ps.epilog.poly_line_smoothing);
                fprintf(f, "  epilog.clamp_color = %u\n", key->ps.epilog.clamp_color);
                break;

        default:
                assert(0);
        }
}

static void si_init_shader_ctx(struct si_shader_context *ctx,
                               struct si_screen *sscreen,
                               struct si_shader *shader,
                               LLVMTargetMachineRef tm)
{
        struct lp_build_tgsi_context *bld_base;
        struct lp_build_tgsi_action tmpl = {};

        memset(ctx, 0, sizeof(*ctx));
        radeon_llvm_context_init(&ctx->radeon_bld, "amdgcn--");
        ctx->tm = tm;
        ctx->screen = sscreen;
        if (shader && shader->selector)
                ctx->type = shader->selector->info.processor;
        else
                ctx->type = -1;
        ctx->shader = shader;

        ctx->voidt = LLVMVoidTypeInContext(ctx->radeon_bld.gallivm.context);
        ctx->i1 = LLVMInt1TypeInContext(ctx->radeon_bld.gallivm.context);
        ctx->i8 = LLVMInt8TypeInContext(ctx->radeon_bld.gallivm.context);
        ctx->i32 = LLVMInt32TypeInContext(ctx->radeon_bld.gallivm.context);
        ctx->i64 = LLVMInt64TypeInContext(ctx->radeon_bld.gallivm.context);
        ctx->i128 = LLVMIntTypeInContext(ctx->radeon_bld.gallivm.context, 128);
        ctx->f32 = LLVMFloatTypeInContext(ctx->radeon_bld.gallivm.context);
        ctx->v16i8 = LLVMVectorType(ctx->i8, 16);
        ctx->v2i32 = LLVMVectorType(ctx->i32, 2);
        ctx->v4i32 = LLVMVectorType(ctx->i32, 4);
        ctx->v4f32 = LLVMVectorType(ctx->f32, 4);
        ctx->v8i32 = LLVMVectorType(ctx->i32, 8);

        bld_base = &ctx->radeon_bld.soa.bld_base;
        if (shader && shader->selector)
                bld_base->info = &shader->selector->info;
        bld_base->emit_fetch_funcs[TGSI_FILE_CONSTANT] = fetch_constant;

        bld_base->op_actions[TGSI_OPCODE_INTERP_CENTROID] = interp_action;
        bld_base->op_actions[TGSI_OPCODE_INTERP_SAMPLE] = interp_action;
        bld_base->op_actions[TGSI_OPCODE_INTERP_OFFSET] = interp_action;

        bld_base->op_actions[TGSI_OPCODE_TEX] = tex_action;
        bld_base->op_actions[TGSI_OPCODE_TEX2] = tex_action;
        bld_base->op_actions[TGSI_OPCODE_TXB] = tex_action;
        bld_base->op_actions[TGSI_OPCODE_TXB2] = tex_action;
        bld_base->op_actions[TGSI_OPCODE_TXD] = tex_action;
        bld_base->op_actions[TGSI_OPCODE_TXF] = tex_action;
        bld_base->op_actions[TGSI_OPCODE_TXL] = tex_action;
        bld_base->op_actions[TGSI_OPCODE_TXL2] = tex_action;
        bld_base->op_actions[TGSI_OPCODE_TXP] = tex_action;
        bld_base->op_actions[TGSI_OPCODE_TXQ].fetch_args = txq_fetch_args;
        bld_base->op_actions[TGSI_OPCODE_TXQ].emit = txq_emit;
        bld_base->op_actions[TGSI_OPCODE_TG4] = tex_action;
        bld_base->op_actions[TGSI_OPCODE_LODQ] = tex_action;
        bld_base->op_actions[TGSI_OPCODE_TXQS].emit = si_llvm_emit_txqs;

        bld_base->op_actions[TGSI_OPCODE_LOAD].fetch_args = load_fetch_args;
        bld_base->op_actions[TGSI_OPCODE_LOAD].emit = load_emit;
        bld_base->op_actions[TGSI_OPCODE_STORE].fetch_args = store_fetch_args;
        bld_base->op_actions[TGSI_OPCODE_STORE].emit = store_emit;
        bld_base->op_actions[TGSI_OPCODE_RESQ].fetch_args = resq_fetch_args;
        bld_base->op_actions[TGSI_OPCODE_RESQ].emit = resq_emit;

        tmpl.fetch_args = atomic_fetch_args;
        tmpl.emit = atomic_emit;
        bld_base->op_actions[TGSI_OPCODE_ATOMUADD] = tmpl;
        bld_base->op_actions[TGSI_OPCODE_ATOMUADD].intr_name = "add";
        bld_base->op_actions[TGSI_OPCODE_ATOMXCHG] = tmpl;
        bld_base->op_actions[TGSI_OPCODE_ATOMXCHG].intr_name = "swap";
        bld_base->op_actions[TGSI_OPCODE_ATOMCAS] = tmpl;
        bld_base->op_actions[TGSI_OPCODE_ATOMCAS].intr_name = "cmpswap";
        bld_base->op_actions[TGSI_OPCODE_ATOMAND] = tmpl;
        bld_base->op_actions[TGSI_OPCODE_ATOMAND].intr_name = "and";
        bld_base->op_actions[TGSI_OPCODE_ATOMOR] = tmpl;
        bld_base->op_actions[TGSI_OPCODE_ATOMOR].intr_name = "or";
        bld_base->op_actions[TGSI_OPCODE_ATOMXOR] = tmpl;
        bld_base->op_actions[TGSI_OPCODE_ATOMXOR].intr_name = "xor";
        bld_base->op_actions[TGSI_OPCODE_ATOMUMIN] = tmpl;
        bld_base->op_actions[TGSI_OPCODE_ATOMUMIN].intr_name = "umin";
        bld_base->op_actions[TGSI_OPCODE_ATOMUMAX] = tmpl;
        bld_base->op_actions[TGSI_OPCODE_ATOMUMAX].intr_name = "umax";
        bld_base->op_actions[TGSI_OPCODE_ATOMIMIN] = tmpl;
        bld_base->op_actions[TGSI_OPCODE_ATOMIMIN].intr_name = "smin";
        bld_base->op_actions[TGSI_OPCODE_ATOMIMAX] = tmpl;
        bld_base->op_actions[TGSI_OPCODE_ATOMIMAX].intr_name = "smax";

        bld_base->op_actions[TGSI_OPCODE_MEMBAR].emit = membar_emit;

        bld_base->op_actions[TGSI_OPCODE_DDX].emit = si_llvm_emit_ddxy;
        bld_base->op_actions[TGSI_OPCODE_DDY].emit = si_llvm_emit_ddxy;
        bld_base->op_actions[TGSI_OPCODE_DDX_FINE].emit = si_llvm_emit_ddxy;
        bld_base->op_actions[TGSI_OPCODE_DDY_FINE].emit = si_llvm_emit_ddxy;

        bld_base->op_actions[TGSI_OPCODE_EMIT].emit = si_llvm_emit_vertex;
        bld_base->op_actions[TGSI_OPCODE_ENDPRIM].emit = si_llvm_emit_primitive;
        bld_base->op_actions[TGSI_OPCODE_BARRIER].emit = si_llvm_emit_barrier;

        bld_base->op_actions[TGSI_OPCODE_MAX].emit = build_tgsi_intrinsic_nomem;
        bld_base->op_actions[TGSI_OPCODE_MAX].intr_name = "llvm.maxnum.f32";
        bld_base->op_actions[TGSI_OPCODE_MIN].emit = build_tgsi_intrinsic_nomem;
        bld_base->op_actions[TGSI_OPCODE_MIN].intr_name = "llvm.minnum.f32";
}

int si_compile_tgsi_shader(struct si_screen *sscreen,
                           LLVMTargetMachineRef tm,
                           struct si_shader *shader,
                           bool is_monolithic,
                           struct pipe_debug_callback *debug)
{
        struct si_shader_selector *sel = shader->selector;
        struct si_shader_context ctx;
        struct lp_build_tgsi_context *bld_base;
        LLVMModuleRef mod;
        int r = 0;

        /* Dump TGSI code before doing TGSI->LLVM conversion in case the
         * conversion fails. */
        if (r600_can_dump_shader(&sscreen->b, sel->info.processor) &&
            !(sscreen->b.debug_flags & DBG_NO_TGSI)) {
                if (is_monolithic)
                        si_dump_shader_key(sel->type, &shader->key, stderr);
                tgsi_dump(sel->tokens, 0);
                si_dump_streamout(&sel->so);
        }

        si_init_shader_ctx(&ctx, sscreen, shader, tm);
        ctx.is_monolithic = is_monolithic;

        shader->info.uses_instanceid = sel->info.uses_instanceid;

        bld_base = &ctx.radeon_bld.soa.bld_base;
        ctx.radeon_bld.load_system_value = declare_system_value;

        switch (ctx.type) {
        case PIPE_SHADER_VERTEX:
                ctx.radeon_bld.load_input = declare_input_vs;
                if (shader->key.vs.as_ls)
                        bld_base->emit_epilogue = si_llvm_emit_ls_epilogue;
                else if (shader->key.vs.as_es)
                        bld_base->emit_epilogue = si_llvm_emit_es_epilogue;
                else
                        bld_base->emit_epilogue = si_llvm_emit_vs_epilogue;
                break;
        case PIPE_SHADER_TESS_CTRL:
                bld_base->emit_fetch_funcs[TGSI_FILE_INPUT] = fetch_input_tcs;
                bld_base->emit_fetch_funcs[TGSI_FILE_OUTPUT] = fetch_output_tcs;
                bld_base->emit_store = store_output_tcs;
                bld_base->emit_epilogue = si_llvm_emit_tcs_epilogue;
                break;
        case PIPE_SHADER_TESS_EVAL:
                bld_base->emit_fetch_funcs[TGSI_FILE_INPUT] = fetch_input_tes;
                if (shader->key.tes.as_es)
                        bld_base->emit_epilogue = si_llvm_emit_es_epilogue;
                else
                        bld_base->emit_epilogue = si_llvm_emit_vs_epilogue;
                break;
        case PIPE_SHADER_GEOMETRY:
                bld_base->emit_fetch_funcs[TGSI_FILE_INPUT] = fetch_input_gs;
                bld_base->emit_epilogue = si_llvm_emit_gs_epilogue;
                break;
        case PIPE_SHADER_FRAGMENT:
                ctx.radeon_bld.load_input = declare_input_fs;
                if (is_monolithic)
                        bld_base->emit_epilogue = si_llvm_emit_fs_epilogue;
                else
                        bld_base->emit_epilogue = si_llvm_return_fs_outputs;
                break;
        case PIPE_SHADER_COMPUTE:
                ctx.radeon_bld.declare_memory_region = declare_compute_memory;
                break;
        default:
                assert(!"Unsupported shader type");
                return -1;
        }

        create_meta_data(&ctx);
        create_function(&ctx);
        preload_constants(&ctx);
        preload_shader_buffers(&ctx);
        preload_samplers(&ctx);
        preload_images(&ctx);
        preload_streamout_buffers(&ctx);
        preload_ring_buffers(&ctx);

        if (ctx.is_monolithic && sel->type == PIPE_SHADER_FRAGMENT &&
            shader->key.ps.prolog.poly_stipple) {
                LLVMValueRef list = LLVMGetParam(ctx.radeon_bld.main_fn,
                                                 SI_PARAM_RW_BUFFERS);
                si_llvm_emit_polygon_stipple(&ctx, list,
                                             SI_PARAM_POS_FIXED_PT);
        }

        if (ctx.type == PIPE_SHADER_GEOMETRY) {
                int i;
                for (i = 0; i < 4; i++) {
                        ctx.gs_next_vertex[i] =
                                lp_build_alloca(bld_base->base.gallivm,
                                                ctx.i32, "");
                }
        }

        if (!lp_build_tgsi_llvm(bld_base, sel->tokens)) {
                fprintf(stderr, "Failed to translate shader from TGSI to LLVM\n");
                goto out;
        }

        si_llvm_build_ret(&ctx, ctx.return_value);
        mod = bld_base->base.gallivm->module;

        /* Dump LLVM IR before any optimization passes */
        if (sscreen->b.debug_flags & DBG_PREOPT_IR &&
            r600_can_dump_shader(&sscreen->b, ctx.type))
                LLVMDumpModule(mod);

        radeon_llvm_finalize_module(&ctx.radeon_bld);

        r = si_compile_llvm(sscreen, &shader->binary, &shader->config, tm,
                            mod, debug, ctx.type, "TGSI shader");
        if (r) {
                fprintf(stderr, "LLVM failed to compile shader\n");
                goto out;
        }

        radeon_llvm_dispose(&ctx.radeon_bld);

        /* Add the scratch offset to input SGPRs. */
        if (shader->config.scratch_bytes_per_wave)
                shader->info.num_input_sgprs += 1; /* scratch byte offset */

        /* Calculate the number of fragment input VGPRs. */
        if (ctx.type == PIPE_SHADER_FRAGMENT) {
                shader->info.num_input_vgprs = 0;
                shader->info.face_vgpr_index = -1;

                if (G_0286CC_PERSP_SAMPLE_ENA(shader->config.spi_ps_input_addr))
                        shader->info.num_input_vgprs += 2;
                if (G_0286CC_PERSP_CENTER_ENA(shader->config.spi_ps_input_addr))
                        shader->info.num_input_vgprs += 2;
                if (G_0286CC_PERSP_CENTROID_ENA(shader->config.spi_ps_input_addr))
                        shader->info.num_input_vgprs += 2;
                if (G_0286CC_PERSP_PULL_MODEL_ENA(shader->config.spi_ps_input_addr))
                        shader->info.num_input_vgprs += 3;
                if (G_0286CC_LINEAR_SAMPLE_ENA(shader->config.spi_ps_input_addr))
                        shader->info.num_input_vgprs += 2;
                if (G_0286CC_LINEAR_CENTER_ENA(shader->config.spi_ps_input_addr))
                        shader->info.num_input_vgprs += 2;
                if (G_0286CC_LINEAR_CENTROID_ENA(shader->config.spi_ps_input_addr))
                        shader->info.num_input_vgprs += 2;
                if (G_0286CC_LINE_STIPPLE_TEX_ENA(shader->config.spi_ps_input_addr))
                        shader->info.num_input_vgprs += 1;
                if (G_0286CC_POS_X_FLOAT_ENA(shader->config.spi_ps_input_addr))
                        shader->info.num_input_vgprs += 1;
                if (G_0286CC_POS_Y_FLOAT_ENA(shader->config.spi_ps_input_addr))
                        shader->info.num_input_vgprs += 1;
                if (G_0286CC_POS_Z_FLOAT_ENA(shader->config.spi_ps_input_addr))
                        shader->info.num_input_vgprs += 1;
                if (G_0286CC_POS_W_FLOAT_ENA(shader->config.spi_ps_input_addr))
                        shader->info.num_input_vgprs += 1;
                if (G_0286CC_FRONT_FACE_ENA(shader->config.spi_ps_input_addr)) {
                        shader->info.face_vgpr_index = shader->info.num_input_vgprs;
                        shader->info.num_input_vgprs += 1;
                }
                if (G_0286CC_ANCILLARY_ENA(shader->config.spi_ps_input_addr))
                        shader->info.num_input_vgprs += 1;
                if (G_0286CC_SAMPLE_COVERAGE_ENA(shader->config.spi_ps_input_addr))
                        shader->info.num_input_vgprs += 1;
                if (G_0286CC_POS_FIXED_PT_ENA(shader->config.spi_ps_input_addr))
                        shader->info.num_input_vgprs += 1;
        }

        if (ctx.type == PIPE_SHADER_GEOMETRY) {
                shader->gs_copy_shader = CALLOC_STRUCT(si_shader);
                shader->gs_copy_shader->selector = shader->selector;
                ctx.shader = shader->gs_copy_shader;
                if ((r = si_generate_gs_copy_shader(sscreen, &ctx,
                                                    shader, debug))) {
                        free(shader->gs_copy_shader);
                        shader->gs_copy_shader = NULL;
                        goto out;
                }
        }

out:
        for (int i = 0; i < SI_NUM_CONST_BUFFERS; i++)
                FREE(ctx.constants[i]);
        return r;
}

/**
 * Create, compile and return a shader part (prolog or epilog).
 *
 * \param sscreen       screen
 * \param list          list of shader parts of the same category
 * \param key           shader part key
 * \param tm            LLVM target machine
 * \param debug         debug callback
 * \param compile       the callback responsible for compilation
 * \return              non-NULL on success
 */
static struct si_shader_part *
si_get_shader_part(struct si_screen *sscreen,
                   struct si_shader_part **list,
                   union si_shader_part_key *key,
                   LLVMTargetMachineRef tm,
                   struct pipe_debug_callback *debug,
                   bool (*compile)(struct si_screen *,
                                   LLVMTargetMachineRef,
                                   struct pipe_debug_callback *,
                                   struct si_shader_part *))
{
        struct si_shader_part *result;

        pipe_mutex_lock(sscreen->shader_parts_mutex);

        /* Find existing. */
        for (result = *list; result; result = result->next) {
                if (memcmp(&result->key, key, sizeof(*key)) == 0) {
                        pipe_mutex_unlock(sscreen->shader_parts_mutex);
                        return result;
                }
        }

        /* Compile a new one. */
        result = CALLOC_STRUCT(si_shader_part);
        result->key = *key;
        if (!compile(sscreen, tm, debug, result)) {
                FREE(result);
                pipe_mutex_unlock(sscreen->shader_parts_mutex);
                return NULL;
        }

        result->next = *list;
        *list = result;
        pipe_mutex_unlock(sscreen->shader_parts_mutex);
        return result;
}

/**
 * Create a vertex shader prolog.
 *
 * The inputs are the same as VS (a lot of SGPRs and 4 VGPR system values).
 * All inputs are returned unmodified. The vertex load indices are
 * stored after them, which will used by the API VS for fetching inputs.
 *
 * For example, the expected outputs for instance_divisors[] = {0, 1, 2} are:
 *   input_v0,
 *   input_v1,
 *   input_v2,
 *   input_v3,
 *   (VertexID + BaseVertex),
 *   (InstanceID + StartInstance),
 *   (InstanceID / 2 + StartInstance)
 */
static bool si_compile_vs_prolog(struct si_screen *sscreen,
                                 LLVMTargetMachineRef tm,
                                 struct pipe_debug_callback *debug,
                                 struct si_shader_part *out)
{
        union si_shader_part_key *key = &out->key;
        struct si_shader shader = {};
        struct si_shader_context ctx;
        struct gallivm_state *gallivm = &ctx.radeon_bld.gallivm;
        LLVMTypeRef *params, *returns;
        LLVMValueRef ret, func;
        int last_sgpr, num_params, num_returns, i;
        bool status = true;

        si_init_shader_ctx(&ctx, sscreen, &shader, tm);
        ctx.type = PIPE_SHADER_VERTEX;
        ctx.param_vertex_id = key->vs_prolog.num_input_sgprs;
        ctx.param_instance_id = key->vs_prolog.num_input_sgprs + 3;

        /* 4 preloaded VGPRs + vertex load indices as prolog outputs */
        params = alloca((key->vs_prolog.num_input_sgprs + 4) *
                        sizeof(LLVMTypeRef));
        returns = alloca((key->vs_prolog.num_input_sgprs + 4 +
                          key->vs_prolog.last_input + 1) *
                         sizeof(LLVMTypeRef));
        num_params = 0;
        num_returns = 0;

        /* Declare input and output SGPRs. */
        num_params = 0;
        for (i = 0; i < key->vs_prolog.num_input_sgprs; i++) {
                params[num_params++] = ctx.i32;
                returns[num_returns++] = ctx.i32;
        }
        last_sgpr = num_params - 1;

        /* 4 preloaded VGPRs (outputs must be floats) */
        for (i = 0; i < 4; i++) {
                params[num_params++] = ctx.i32;
                returns[num_returns++] = ctx.f32;
        }

        /* Vertex load indices. */
        for (i = 0; i <= key->vs_prolog.last_input; i++)
                returns[num_returns++] = ctx.f32;

        /* Create the function. */
        si_create_function(&ctx, returns, num_returns, params,
                           num_params, -1, last_sgpr);
        func = ctx.radeon_bld.main_fn;

        /* Copy inputs to outputs. This should be no-op, as the registers match,
         * but it will prevent the compiler from overwriting them unintentionally.
         */
        ret = ctx.return_value;
        for (i = 0; i < key->vs_prolog.num_input_sgprs; i++) {
                LLVMValueRef p = LLVMGetParam(func, i);
                ret = LLVMBuildInsertValue(gallivm->builder, ret, p, i, "");
        }
        for (i = num_params - 4; i < num_params; i++) {
                LLVMValueRef p = LLVMGetParam(func, i);
                p = LLVMBuildBitCast(gallivm->builder, p, ctx.f32, "");
                ret = LLVMBuildInsertValue(gallivm->builder, ret, p, i, "");
        }

        /* Compute vertex load indices from instance divisors. */
        for (i = 0; i <= key->vs_prolog.last_input; i++) {
                unsigned divisor = key->vs_prolog.states.instance_divisors[i];
                LLVMValueRef index;

                if (divisor) {
                        /* InstanceID / Divisor + StartInstance */
                        index = get_instance_index_for_fetch(&ctx.radeon_bld,
                                                             SI_SGPR_START_INSTANCE,
                                                             divisor);
                } else {
                        /* VertexID + BaseVertex */
                        index = LLVMBuildAdd(gallivm->builder,
                                             LLVMGetParam(func, ctx.param_vertex_id),
                                             LLVMGetParam(func, SI_SGPR_BASE_VERTEX), "");
                }

                index = LLVMBuildBitCast(gallivm->builder, index, ctx.f32, "");
                ret = LLVMBuildInsertValue(gallivm->builder, ret, index,
                                           num_params++, "");
        }

        /* Compile. */
        si_llvm_build_ret(&ctx, ret);
        radeon_llvm_finalize_module(&ctx.radeon_bld);

        if (si_compile_llvm(sscreen, &out->binary, &out->config, tm,
                            gallivm->module, debug, ctx.type,
                            "Vertex Shader Prolog"))
                status = false;

        radeon_llvm_dispose(&ctx.radeon_bld);
        return status;
}

/**
 * Compile the vertex shader epilog. This is also used by the tessellation
 * evaluation shader compiled as VS.
 *
 * The input is PrimitiveID.
 *
 * If PrimitiveID is required by the pixel shader, export it.
 * Otherwise, do nothing.
 */
static bool si_compile_vs_epilog(struct si_screen *sscreen,
                                 LLVMTargetMachineRef tm,
                                 struct pipe_debug_callback *debug,
                                 struct si_shader_part *out)
{
        union si_shader_part_key *key = &out->key;
        struct si_shader_context ctx;
        struct gallivm_state *gallivm = &ctx.radeon_bld.gallivm;
        struct lp_build_tgsi_context *bld_base = &ctx.radeon_bld.soa.bld_base;
        LLVMTypeRef params[5];
        int num_params, i;
        bool status = true;

        si_init_shader_ctx(&ctx, sscreen, NULL, tm);
        ctx.type = PIPE_SHADER_VERTEX;

        /* Declare input VGPRs. */
        num_params = key->vs_epilog.states.export_prim_id ?
                           (VS_EPILOG_PRIMID_LOC + 1) : 0;
        assert(num_params <= ARRAY_SIZE(params));

        for (i = 0; i < num_params; i++)
                params[i] = ctx.f32;

        /* Create the function. */
        si_create_function(&ctx, NULL, 0, params, num_params,
                           -1, -1);

        /* Emit exports. */
        if (key->vs_epilog.states.export_prim_id) {
                struct lp_build_context *base = &bld_base->base;
                struct lp_build_context *uint = &bld_base->uint_bld;
                LLVMValueRef args[9];

                args[0] = lp_build_const_int32(base->gallivm, 0x0); /* enabled channels */
                args[1] = uint->zero; /* whether the EXEC mask is valid */
                args[2] = uint->zero; /* DONE bit */
                args[3] = lp_build_const_int32(base->gallivm, V_008DFC_SQ_EXP_PARAM +
                                               key->vs_epilog.prim_id_param_offset);
                args[4] = uint->zero; /* COMPR flag (0 = 32-bit export) */
                args[5] = LLVMGetParam(ctx.radeon_bld.main_fn,
                                       VS_EPILOG_PRIMID_LOC); /* X */
                args[6] = uint->undef; /* Y */
                args[7] = uint->undef; /* Z */
                args[8] = uint->undef; /* W */

                lp_build_intrinsic(base->gallivm->builder, "llvm.SI.export",
                                   LLVMVoidTypeInContext(base->gallivm->context),
                                   args, 9, 0);
        }

        /* Compile. */
        LLVMBuildRetVoid(gallivm->builder);
        radeon_llvm_finalize_module(&ctx.radeon_bld);

        if (si_compile_llvm(sscreen, &out->binary, &out->config, tm,
                            gallivm->module, debug, ctx.type,
                            "Vertex Shader Epilog"))
                status = false;

        radeon_llvm_dispose(&ctx.radeon_bld);
        return status;
}

/**
 * Create & compile a vertex shader epilog. This a helper used by VS and TES.
 */
static bool si_get_vs_epilog(struct si_screen *sscreen,
                             LLVMTargetMachineRef tm,
                             struct si_shader *shader,
                             struct pipe_debug_callback *debug,
                             struct si_vs_epilog_bits *states)
{
        union si_shader_part_key epilog_key;

        memset(&epilog_key, 0, sizeof(epilog_key));
        epilog_key.vs_epilog.states = *states;

        /* Set up the PrimitiveID output. */
        if (shader->key.vs.epilog.export_prim_id) {
                unsigned index = shader->selector->info.num_outputs;
                unsigned offset = shader->info.nr_param_exports++;

                epilog_key.vs_epilog.prim_id_param_offset = offset;
                assert(index < ARRAY_SIZE(shader->info.vs_output_param_offset));
                shader->info.vs_output_param_offset[index] = offset;
        }

        shader->epilog = si_get_shader_part(sscreen, &sscreen->vs_epilogs,
                                            &epilog_key, tm, debug,
                                            si_compile_vs_epilog);
        return shader->epilog != NULL;
}

/**
 * Select and compile (or reuse) vertex shader parts (prolog & epilog).
 */
static bool si_shader_select_vs_parts(struct si_screen *sscreen,
                                      LLVMTargetMachineRef tm,
                                      struct si_shader *shader,
                                      struct pipe_debug_callback *debug)
{
        struct tgsi_shader_info *info = &shader->selector->info;
        union si_shader_part_key prolog_key;
        unsigned i;

        /* Get the prolog. */
        memset(&prolog_key, 0, sizeof(prolog_key));
        prolog_key.vs_prolog.states = shader->key.vs.prolog;
        prolog_key.vs_prolog.num_input_sgprs = shader->info.num_input_sgprs;
        prolog_key.vs_prolog.last_input = MAX2(1, info->num_inputs) - 1;

        /* The prolog is a no-op if there are no inputs. */
        if (info->num_inputs) {
                shader->prolog =
                        si_get_shader_part(sscreen, &sscreen->vs_prologs,
                                           &prolog_key, tm, debug,
                                           si_compile_vs_prolog);
                if (!shader->prolog)
                        return false;
        }

        /* Get the epilog. */
        if (!shader->key.vs.as_es && !shader->key.vs.as_ls &&
            !si_get_vs_epilog(sscreen, tm, shader, debug,
                              &shader->key.vs.epilog))
                return false;

        /* Set the instanceID flag. */
        for (i = 0; i < info->num_inputs; i++)
                if (prolog_key.vs_prolog.states.instance_divisors[i])
                        shader->info.uses_instanceid = true;

        return true;
}

/**
 * Select and compile (or reuse) TES parts (epilog).
 */
static bool si_shader_select_tes_parts(struct si_screen *sscreen,
                                       LLVMTargetMachineRef tm,
                                       struct si_shader *shader,
                                       struct pipe_debug_callback *debug)
{
        if (shader->key.tes.as_es)
                return true;

        /* TES compiled as VS. */
        return si_get_vs_epilog(sscreen, tm, shader, debug,
                                &shader->key.tes.epilog);
}

/**
 * Compile the TCS epilog. This writes tesselation factors to memory based on
 * the output primitive type of the tesselator (determined by TES).
 */
static bool si_compile_tcs_epilog(struct si_screen *sscreen,
                                  LLVMTargetMachineRef tm,
                                  struct pipe_debug_callback *debug,
                                  struct si_shader_part *out)
{
        union si_shader_part_key *key = &out->key;
        struct si_shader shader = {};
        struct si_shader_context ctx;
        struct gallivm_state *gallivm = &ctx.radeon_bld.gallivm;
        struct lp_build_tgsi_context *bld_base = &ctx.radeon_bld.soa.bld_base;
        LLVMTypeRef params[16];
        LLVMValueRef func;
        int last_array_pointer, last_sgpr, num_params;
        bool status = true;

        si_init_shader_ctx(&ctx, sscreen, &shader, tm);
        ctx.type = PIPE_SHADER_TESS_CTRL;
        shader.key.tcs.epilog = key->tcs_epilog.states;

        /* Declare inputs. Only RW_BUFFERS and TESS_FACTOR_OFFSET are used. */
        params[SI_PARAM_RW_BUFFERS] = const_array(ctx.v16i8, SI_NUM_RW_BUFFERS);
        last_array_pointer = SI_PARAM_RW_BUFFERS;
        params[SI_PARAM_CONST_BUFFERS] = ctx.i64;
        params[SI_PARAM_SAMPLERS] = ctx.i64;
        params[SI_PARAM_IMAGES] = ctx.i64;
        params[SI_PARAM_SHADER_BUFFERS] = ctx.i64;
        params[SI_PARAM_TCS_OFFCHIP_LAYOUT] = ctx.i32;
        params[SI_PARAM_TCS_OUT_OFFSETS] = ctx.i32;
        params[SI_PARAM_TCS_OUT_LAYOUT] = ctx.i32;
        params[SI_PARAM_TCS_IN_LAYOUT] = ctx.i32;
        params[ctx.param_oc_lds = SI_PARAM_TCS_OC_LDS] = ctx.i32;
        params[SI_PARAM_TESS_FACTOR_OFFSET] = ctx.i32;
        last_sgpr = SI_PARAM_TESS_FACTOR_OFFSET;
        num_params = last_sgpr + 1;

        params[num_params++] = ctx.i32; /* patch index within the wave (REL_PATCH_ID) */
        params[num_params++] = ctx.i32; /* invocation ID within the patch */
        params[num_params++] = ctx.i32; /* LDS offset where tess factors should be loaded from */

        /* Create the function. */
        si_create_function(&ctx, NULL, 0, params, num_params,
                           last_array_pointer, last_sgpr);
        declare_tess_lds(&ctx);
        func = ctx.radeon_bld.main_fn;

        si_write_tess_factors(bld_base,
                              LLVMGetParam(func, last_sgpr + 1),
                              LLVMGetParam(func, last_sgpr + 2),
                              LLVMGetParam(func, last_sgpr + 3));

        /* Compile. */
        LLVMBuildRetVoid(gallivm->builder);
        radeon_llvm_finalize_module(&ctx.radeon_bld);

        if (si_compile_llvm(sscreen, &out->binary, &out->config, tm,
                            gallivm->module, debug, ctx.type,
                            "Tessellation Control Shader Epilog"))
                status = false;

        radeon_llvm_dispose(&ctx.radeon_bld);
        return status;
}

/**
 * Select and compile (or reuse) TCS parts (epilog).
 */
static bool si_shader_select_tcs_parts(struct si_screen *sscreen,
                                       LLVMTargetMachineRef tm,
                                       struct si_shader *shader,
                                       struct pipe_debug_callback *debug)
{
        union si_shader_part_key epilog_key;

        /* Get the epilog. */
        memset(&epilog_key, 0, sizeof(epilog_key));
        epilog_key.tcs_epilog.states = shader->key.tcs.epilog;

        shader->epilog = si_get_shader_part(sscreen, &sscreen->tcs_epilogs,
                                            &epilog_key, tm, debug,
                                            si_compile_tcs_epilog);
        return shader->epilog != NULL;
}

/**
 * Compile the pixel shader prolog. This handles:
 * - two-side color selection and interpolation
 * - overriding interpolation parameters for the API PS
 * - polygon stippling
 *
 * All preloaded SGPRs and VGPRs are passed through unmodified unless they are
 * overriden by other states. (e.g. per-sample interpolation)
 * Interpolated colors are stored after the preloaded VGPRs.
 */
static bool si_compile_ps_prolog(struct si_screen *sscreen,
                                 LLVMTargetMachineRef tm,
                                 struct pipe_debug_callback *debug,
                                 struct si_shader_part *out)
{
        union si_shader_part_key *key = &out->key;
        struct si_shader shader = {};
        struct si_shader_context ctx;
        struct gallivm_state *gallivm = &ctx.radeon_bld.gallivm;
        LLVMTypeRef *params;
        LLVMValueRef ret, func;
        int last_sgpr, num_params, num_returns, i, num_color_channels;
        bool status = true;

        si_init_shader_ctx(&ctx, sscreen, &shader, tm);
        ctx.type = PIPE_SHADER_FRAGMENT;
        shader.key.ps.prolog = key->ps_prolog.states;

        /* Number of inputs + 8 color elements. */
        params = alloca((key->ps_prolog.num_input_sgprs +
                         key->ps_prolog.num_input_vgprs + 8) *
                        sizeof(LLVMTypeRef));

        /* Declare inputs. */
        num_params = 0;
        for (i = 0; i < key->ps_prolog.num_input_sgprs; i++)
                params[num_params++] = ctx.i32;
        last_sgpr = num_params - 1;

        for (i = 0; i < key->ps_prolog.num_input_vgprs; i++)
                params[num_params++] = ctx.f32;

        /* Declare outputs (same as inputs + add colors if needed) */
        num_returns = num_params;
        num_color_channels = util_bitcount(key->ps_prolog.colors_read);
        for (i = 0; i < num_color_channels; i++)
                params[num_returns++] = ctx.f32;

        /* Create the function. */
        si_create_function(&ctx, params, num_returns, params,
                           num_params, -1, last_sgpr);
        func = ctx.radeon_bld.main_fn;

        /* Copy inputs to outputs. This should be no-op, as the registers match,
         * but it will prevent the compiler from overwriting them unintentionally.
         */
        ret = ctx.return_value;
        for (i = 0; i < num_params; i++) {
                LLVMValueRef p = LLVMGetParam(func, i);
                ret = LLVMBuildInsertValue(gallivm->builder, ret, p, i, "");
        }

        /* Polygon stippling. */
        if (key->ps_prolog.states.poly_stipple) {
                /* POS_FIXED_PT is always last. */
                unsigned pos = key->ps_prolog.num_input_sgprs +
                               key->ps_prolog.num_input_vgprs - 1;
                LLVMValueRef ptr[2], list;

                /* Get the pointer to rw buffers. */
                ptr[0] = LLVMGetParam(func, SI_SGPR_RW_BUFFERS);
                ptr[1] = LLVMGetParam(func, SI_SGPR_RW_BUFFERS_HI);
                list = lp_build_gather_values(gallivm, ptr, 2);
                list = LLVMBuildBitCast(gallivm->builder, list, ctx.i64, "");
                list = LLVMBuildIntToPtr(gallivm->builder, list,
                                          const_array(ctx.v16i8, SI_NUM_RW_BUFFERS), "");

                si_llvm_emit_polygon_stipple(&ctx, list, pos);
        }

        if (key->ps_prolog.states.bc_optimize_for_persp ||
            key->ps_prolog.states.bc_optimize_for_linear) {
                unsigned i, base = key->ps_prolog.num_input_sgprs;
                LLVMValueRef center[2], centroid[2], tmp, bc_optimize;

                /* The shader should do: if (PRIM_MASK[31]) CENTROID = CENTER;
                 * The hw doesn't compute CENTROID if the whole wave only
                 * contains fully-covered quads.
                 *
                 * PRIM_MASK is after user SGPRs.
                 */
                bc_optimize = LLVMGetParam(func, SI_PS_NUM_USER_SGPR);
                bc_optimize = LLVMBuildLShr(gallivm->builder, bc_optimize,
                                            LLVMConstInt(ctx.i32, 31, 0), "");
                bc_optimize = LLVMBuildTrunc(gallivm->builder, bc_optimize,
                                             ctx.i1, "");

                if (key->ps_prolog.states.bc_optimize_for_persp) {
                        /* Read PERSP_CENTER. */
                        for (i = 0; i < 2; i++)
                                center[i] = LLVMGetParam(func, base + 2 + i);
                        /* Read PERSP_CENTROID. */
                        for (i = 0; i < 2; i++)
                                centroid[i] = LLVMGetParam(func, base + 4 + i);
                        /* Select PERSP_CENTROID. */
                        for (i = 0; i < 2; i++) {
                                tmp = LLVMBuildSelect(gallivm->builder, bc_optimize,
                                                      center[i], centroid[i], "");
                                ret = LLVMBuildInsertValue(gallivm->builder, ret,
                                                           tmp, base + 4 + i, "");
                        }
                }
                if (key->ps_prolog.states.bc_optimize_for_linear) {
                        /* Read LINEAR_CENTER. */
                        for (i = 0; i < 2; i++)
                                center[i] = LLVMGetParam(func, base + 8 + i);
                        /* Read LINEAR_CENTROID. */
                        for (i = 0; i < 2; i++)
                                centroid[i] = LLVMGetParam(func, base + 10 + i);
                        /* Select LINEAR_CENTROID. */
                        for (i = 0; i < 2; i++) {
                                tmp = LLVMBuildSelect(gallivm->builder, bc_optimize,
                                                      center[i], centroid[i], "");
                                ret = LLVMBuildInsertValue(gallivm->builder, ret,
                                                           tmp, base + 10 + i, "");
                        }
                }
        }

        /* Interpolate colors. */
        for (i = 0; i < 2; i++) {
                unsigned writemask = (key->ps_prolog.colors_read >> (i * 4)) & 0xf;
                unsigned face_vgpr = key->ps_prolog.num_input_sgprs +
                                     key->ps_prolog.face_vgpr_index;
                LLVMValueRef interp[2], color[4];
                LLVMValueRef interp_ij = NULL, prim_mask = NULL, face = NULL;

                if (!writemask)
                        continue;

                /* If the interpolation qualifier is not CONSTANT (-1). */
                if (key->ps_prolog.color_interp_vgpr_index[i] != -1) {
                        unsigned interp_vgpr = key->ps_prolog.num_input_sgprs +
                                               key->ps_prolog.color_interp_vgpr_index[i];

                        /* Get the (i,j) updated by bc_optimize handling. */
                        interp[0] = LLVMBuildExtractValue(gallivm->builder, ret,
                                                          interp_vgpr, "");
                        interp[1] = LLVMBuildExtractValue(gallivm->builder, ret,
                                                          interp_vgpr + 1, "");
                        interp_ij = lp_build_gather_values(gallivm, interp, 2);
                        interp_ij = LLVMBuildBitCast(gallivm->builder, interp_ij,
                                                     ctx.v2i32, "");
                }

                /* Use the absolute location of the input. */
                prim_mask = LLVMGetParam(func, SI_PS_NUM_USER_SGPR);

                if (key->ps_prolog.states.color_two_side) {
                        face = LLVMGetParam(func, face_vgpr);
                        face = LLVMBuildBitCast(gallivm->builder, face, ctx.i32, "");
                }

                interp_fs_input(&ctx,
                                key->ps_prolog.color_attr_index[i],
                                TGSI_SEMANTIC_COLOR, i,
                                key->ps_prolog.num_interp_inputs,
                                key->ps_prolog.colors_read, interp_ij,
                                prim_mask, face, color);

                while (writemask) {
                        unsigned chan = u_bit_scan(&writemask);
                        ret = LLVMBuildInsertValue(gallivm->builder, ret, color[chan],
                                                   num_params++, "");
                }
        }

        /* Force per-sample interpolation. */
        if (key->ps_prolog.states.force_persp_sample_interp) {
                unsigned i, base = key->ps_prolog.num_input_sgprs;
                LLVMValueRef persp_sample[2];

                /* Read PERSP_SAMPLE. */
                for (i = 0; i < 2; i++)
                        persp_sample[i] = LLVMGetParam(func, base + i);
                /* Overwrite PERSP_CENTER. */
                for (i = 0; i < 2; i++)
                        ret = LLVMBuildInsertValue(gallivm->builder, ret,
                                                   persp_sample[i], base + 2 + i, "");
                /* Overwrite PERSP_CENTROID. */
                for (i = 0; i < 2; i++)
                        ret = LLVMBuildInsertValue(gallivm->builder, ret,
                                                   persp_sample[i], base + 4 + i, "");
        }
        if (key->ps_prolog.states.force_linear_sample_interp) {
                unsigned i, base = key->ps_prolog.num_input_sgprs;
                LLVMValueRef linear_sample[2];

                /* Read LINEAR_SAMPLE. */
                for (i = 0; i < 2; i++)
                        linear_sample[i] = LLVMGetParam(func, base + 6 + i);
                /* Overwrite LINEAR_CENTER. */
                for (i = 0; i < 2; i++)
                        ret = LLVMBuildInsertValue(gallivm->builder, ret,
                                                   linear_sample[i], base + 8 + i, "");
                /* Overwrite LINEAR_CENTROID. */
                for (i = 0; i < 2; i++)
                        ret = LLVMBuildInsertValue(gallivm->builder, ret,
                                                   linear_sample[i], base + 10 + i, "");
        }

        /* Force center interpolation. */
        if (key->ps_prolog.states.force_persp_center_interp) {
                unsigned i, base = key->ps_prolog.num_input_sgprs;
                LLVMValueRef persp_center[2];

                /* Read PERSP_CENTER. */
                for (i = 0; i < 2; i++)
                        persp_center[i] = LLVMGetParam(func, base + 2 + i);
                /* Overwrite PERSP_SAMPLE. */
                for (i = 0; i < 2; i++)
                        ret = LLVMBuildInsertValue(gallivm->builder, ret,
                                                   persp_center[i], base + i, "");
                /* Overwrite PERSP_CENTROID. */
                for (i = 0; i < 2; i++)
                        ret = LLVMBuildInsertValue(gallivm->builder, ret,
                                                   persp_center[i], base + 4 + i, "");
        }
        if (key->ps_prolog.states.force_linear_center_interp) {
                unsigned i, base = key->ps_prolog.num_input_sgprs;
                LLVMValueRef linear_center[2];

                /* Read LINEAR_CENTER. */
                for (i = 0; i < 2; i++)
                        linear_center[i] = LLVMGetParam(func, base + 8 + i);
                /* Overwrite LINEAR_SAMPLE. */
                for (i = 0; i < 2; i++)
                        ret = LLVMBuildInsertValue(gallivm->builder, ret,
                                                   linear_center[i], base + 6 + i, "");
                /* Overwrite LINEAR_CENTROID. */
                for (i = 0; i < 2; i++)
                        ret = LLVMBuildInsertValue(gallivm->builder, ret,
                                                   linear_center[i], base + 10 + i, "");
        }

        /* Tell LLVM to insert WQM instruction sequence when needed. */
        if (key->ps_prolog.wqm) {
                LLVMAddTargetDependentFunctionAttr(func,
                                                   "amdgpu-ps-wqm-outputs", "");
        }

        /* Compile. */
        si_llvm_build_ret(&ctx, ret);
        radeon_llvm_finalize_module(&ctx.radeon_bld);

        if (si_compile_llvm(sscreen, &out->binary, &out->config, tm,
                            gallivm->module, debug, ctx.type,
                            "Fragment Shader Prolog"))
                status = false;

        radeon_llvm_dispose(&ctx.radeon_bld);
        return status;
}

/**
 * Compile the pixel shader epilog. This handles everything that must be
 * emulated for pixel shader exports. (alpha-test, format conversions, etc)
 */
static bool si_compile_ps_epilog(struct si_screen *sscreen,
                                 LLVMTargetMachineRef tm,
                                 struct pipe_debug_callback *debug,
                                 struct si_shader_part *out)
{
        union si_shader_part_key *key = &out->key;
        struct si_shader shader = {};
        struct si_shader_context ctx;
        struct gallivm_state *gallivm = &ctx.radeon_bld.gallivm;
        struct lp_build_tgsi_context *bld_base = &ctx.radeon_bld.soa.bld_base;
        LLVMTypeRef params[16+8*4+3];
        LLVMValueRef depth = NULL, stencil = NULL, samplemask = NULL;
        int last_array_pointer, last_sgpr, num_params, i;
        bool status = true;

        si_init_shader_ctx(&ctx, sscreen, &shader, tm);
        ctx.type = PIPE_SHADER_FRAGMENT;
        shader.key.ps.epilog = key->ps_epilog.states;

        /* Declare input SGPRs. */
        params[SI_PARAM_RW_BUFFERS] = ctx.i64;
        params[SI_PARAM_CONST_BUFFERS] = ctx.i64;
        params[SI_PARAM_SAMPLERS] = ctx.i64;
        params[SI_PARAM_IMAGES] = ctx.i64;
        params[SI_PARAM_SHADER_BUFFERS] = ctx.i64;
        params[SI_PARAM_ALPHA_REF] = ctx.f32;
        last_array_pointer = -1;
        last_sgpr = SI_PARAM_ALPHA_REF;

        /* Declare input VGPRs. */
        num_params = (last_sgpr + 1) +
                     util_bitcount(key->ps_epilog.colors_written) * 4 +
                     key->ps_epilog.writes_z +
                     key->ps_epilog.writes_stencil +
                     key->ps_epilog.writes_samplemask;

        num_params = MAX2(num_params,
                          last_sgpr + 1 + PS_EPILOG_SAMPLEMASK_MIN_LOC + 1);

        assert(num_params <= ARRAY_SIZE(params));

        for (i = last_sgpr + 1; i < num_params; i++)
                params[i] = ctx.f32;

        /* Create the function. */
        si_create_function(&ctx, NULL, 0, params, num_params,
                           last_array_pointer, last_sgpr);
        /* Disable elimination of unused inputs. */
        radeon_llvm_add_attribute(ctx.radeon_bld.main_fn,
                                  "InitialPSInputAddr", 0xffffff);

        /* Process colors. */
        unsigned vgpr = last_sgpr + 1;
        unsigned colors_written = key->ps_epilog.colors_written;
        int last_color_export = -1;

        /* Find the last color export. */
        if (!key->ps_epilog.writes_z &&
            !key->ps_epilog.writes_stencil &&
            !key->ps_epilog.writes_samplemask) {
                unsigned spi_format = key->ps_epilog.states.spi_shader_col_format;

                /* If last_cbuf > 0, FS_COLOR0_WRITES_ALL_CBUFS is true. */
                if (colors_written == 0x1 && key->ps_epilog.states.last_cbuf > 0) {
                        /* Just set this if any of the colorbuffers are enabled. */
                        if (spi_format &
                            ((1llu << (4 * (key->ps_epilog.states.last_cbuf + 1))) - 1))
                                last_color_export = 0;
                } else {
                        for (i = 0; i < 8; i++)
                                if (colors_written & (1 << i) &&
                                    (spi_format >> (i * 4)) & 0xf)
                                        last_color_export = i;
                }
        }

        while (colors_written) {
                LLVMValueRef color[4];
                int mrt = u_bit_scan(&colors_written);

                for (i = 0; i < 4; i++)
                        color[i] = LLVMGetParam(ctx.radeon_bld.main_fn, vgpr++);

                si_export_mrt_color(bld_base, color, mrt,
                                    num_params - 1,
                                    mrt == last_color_export);
        }

        /* Process depth, stencil, samplemask. */
        if (key->ps_epilog.writes_z)
                depth = LLVMGetParam(ctx.radeon_bld.main_fn, vgpr++);
        if (key->ps_epilog.writes_stencil)
                stencil = LLVMGetParam(ctx.radeon_bld.main_fn, vgpr++);
        if (key->ps_epilog.writes_samplemask)
                samplemask = LLVMGetParam(ctx.radeon_bld.main_fn, vgpr++);

        if (depth || stencil || samplemask)
                si_export_mrt_z(bld_base, depth, stencil, samplemask);
        else if (last_color_export == -1)
                si_export_null(bld_base);

        /* Compile. */
        LLVMBuildRetVoid(gallivm->builder);
        radeon_llvm_finalize_module(&ctx.radeon_bld);

        if (si_compile_llvm(sscreen, &out->binary, &out->config, tm,
                            gallivm->module, debug, ctx.type,
                            "Fragment Shader Epilog"))
                status = false;

        radeon_llvm_dispose(&ctx.radeon_bld);
        return status;
}

/**
 * Select and compile (or reuse) pixel shader parts (prolog & epilog).
 */
static bool si_shader_select_ps_parts(struct si_screen *sscreen,
                                      LLVMTargetMachineRef tm,
                                      struct si_shader *shader,
                                      struct pipe_debug_callback *debug)
{
        struct tgsi_shader_info *info = &shader->selector->info;
        union si_shader_part_key prolog_key;
        union si_shader_part_key epilog_key;
        unsigned i;

        /* Get the prolog. */
        memset(&prolog_key, 0, sizeof(prolog_key));
        prolog_key.ps_prolog.states = shader->key.ps.prolog;
        prolog_key.ps_prolog.colors_read = info->colors_read;
        prolog_key.ps_prolog.num_input_sgprs = shader->info.num_input_sgprs;
        prolog_key.ps_prolog.num_input_vgprs = shader->info.num_input_vgprs;
        prolog_key.ps_prolog.wqm = info->uses_derivatives &&
                (prolog_key.ps_prolog.colors_read ||
                 prolog_key.ps_prolog.states.force_persp_sample_interp ||
                 prolog_key.ps_prolog.states.force_linear_sample_interp ||
                 prolog_key.ps_prolog.states.force_persp_center_interp ||
                 prolog_key.ps_prolog.states.force_linear_center_interp ||
                 prolog_key.ps_prolog.states.bc_optimize_for_persp ||
                 prolog_key.ps_prolog.states.bc_optimize_for_linear);

        if (info->colors_read) {
                unsigned *color = shader->selector->color_attr_index;

                if (shader->key.ps.prolog.color_two_side) {
                        /* BCOLORs are stored after the last input. */
                        prolog_key.ps_prolog.num_interp_inputs = info->num_inputs;
                        prolog_key.ps_prolog.face_vgpr_index = shader->info.face_vgpr_index;
                        shader->config.spi_ps_input_ena |= S_0286CC_FRONT_FACE_ENA(1);
                }

                for (i = 0; i < 2; i++) {
                        unsigned interp = info->input_interpolate[color[i]];
                        unsigned location = info->input_interpolate_loc[color[i]];

                        if (!(info->colors_read & (0xf << i*4)))
                                continue;

                        prolog_key.ps_prolog.color_attr_index[i] = color[i];

                        if (shader->key.ps.prolog.flatshade_colors &&
                            interp == TGSI_INTERPOLATE_COLOR)
                                interp = TGSI_INTERPOLATE_CONSTANT;

                        switch (interp) {
                        case TGSI_INTERPOLATE_CONSTANT:
                                prolog_key.ps_prolog.color_interp_vgpr_index[i] = -1;
                                break;
                        case TGSI_INTERPOLATE_PERSPECTIVE:
                        case TGSI_INTERPOLATE_COLOR:
                                /* Force the interpolation location for colors here. */
                                if (shader->key.ps.prolog.force_persp_sample_interp)
                                        location = TGSI_INTERPOLATE_LOC_SAMPLE;
                                if (shader->key.ps.prolog.force_persp_center_interp)
                                        location = TGSI_INTERPOLATE_LOC_CENTER;

                                switch (location) {
                                case TGSI_INTERPOLATE_LOC_SAMPLE:
                                        prolog_key.ps_prolog.color_interp_vgpr_index[i] = 0;
                                        shader->config.spi_ps_input_ena |=
                                                S_0286CC_PERSP_SAMPLE_ENA(1);
                                        break;
                                case TGSI_INTERPOLATE_LOC_CENTER:
                                        prolog_key.ps_prolog.color_interp_vgpr_index[i] = 2;
                                        shader->config.spi_ps_input_ena |=
                                                S_0286CC_PERSP_CENTER_ENA(1);
                                        break;
                                case TGSI_INTERPOLATE_LOC_CENTROID:
                                        prolog_key.ps_prolog.color_interp_vgpr_index[i] = 4;
                                        shader->config.spi_ps_input_ena |=
                                                S_0286CC_PERSP_CENTROID_ENA(1);
                                        break;
                                default:
                                        assert(0);
                                }
                                break;
                        case TGSI_INTERPOLATE_LINEAR:
                                /* Force the interpolation location for colors here. */
                                if (shader->key.ps.prolog.force_linear_sample_interp)
                                        location = TGSI_INTERPOLATE_LOC_SAMPLE;
                                if (shader->key.ps.prolog.force_linear_center_interp)
                                        location = TGSI_INTERPOLATE_LOC_CENTER;

                                switch (location) {
                                case TGSI_INTERPOLATE_LOC_SAMPLE:
                                        prolog_key.ps_prolog.color_interp_vgpr_index[i] = 6;
                                        shader->config.spi_ps_input_ena |=
                                                S_0286CC_LINEAR_SAMPLE_ENA(1);
                                        break;
                                case TGSI_INTERPOLATE_LOC_CENTER:
                                        prolog_key.ps_prolog.color_interp_vgpr_index[i] = 8;
                                        shader->config.spi_ps_input_ena |=
                                                S_0286CC_LINEAR_CENTER_ENA(1);
                                        break;
                                case TGSI_INTERPOLATE_LOC_CENTROID:
                                        prolog_key.ps_prolog.color_interp_vgpr_index[i] = 10;
                                        shader->config.spi_ps_input_ena |=
                                                S_0286CC_LINEAR_CENTROID_ENA(1);
                                        break;
                                default:
                                        assert(0);
                                }
                                break;
                        default:
                                assert(0);
                        }
                }
        }

        /* The prolog is a no-op if these aren't set. */
        if (prolog_key.ps_prolog.colors_read ||
            prolog_key.ps_prolog.states.force_persp_sample_interp ||
            prolog_key.ps_prolog.states.force_linear_sample_interp ||
            prolog_key.ps_prolog.states.force_persp_center_interp ||
            prolog_key.ps_prolog.states.force_linear_center_interp ||
            prolog_key.ps_prolog.states.bc_optimize_for_persp ||
            prolog_key.ps_prolog.states.bc_optimize_for_linear ||
            prolog_key.ps_prolog.states.poly_stipple) {
                shader->prolog =
                        si_get_shader_part(sscreen, &sscreen->ps_prologs,
                                           &prolog_key, tm, debug,
                                           si_compile_ps_prolog);
                if (!shader->prolog)
                        return false;
        }

        /* Get the epilog. */
        memset(&epilog_key, 0, sizeof(epilog_key));
        epilog_key.ps_epilog.colors_written = info->colors_written;
        epilog_key.ps_epilog.writes_z = info->writes_z;
        epilog_key.ps_epilog.writes_stencil = info->writes_stencil;
        epilog_key.ps_epilog.writes_samplemask = info->writes_samplemask;
        epilog_key.ps_epilog.states = shader->key.ps.epilog;

        shader->epilog =
                si_get_shader_part(sscreen, &sscreen->ps_epilogs,
                                   &epilog_key, tm, debug,
                                   si_compile_ps_epilog);
        if (!shader->epilog)
                return false;

        /* Enable POS_FIXED_PT if polygon stippling is enabled. */
        if (shader->key.ps.prolog.poly_stipple) {
                shader->config.spi_ps_input_ena |= S_0286CC_POS_FIXED_PT_ENA(1);
                assert(G_0286CC_POS_FIXED_PT_ENA(shader->config.spi_ps_input_addr));
        }

        /* Set up the enable bits for per-sample shading if needed. */
        if (shader->key.ps.prolog.force_persp_sample_interp &&
            (G_0286CC_PERSP_CENTER_ENA(shader->config.spi_ps_input_ena) ||
             G_0286CC_PERSP_CENTROID_ENA(shader->config.spi_ps_input_ena))) {
                shader->config.spi_ps_input_ena &= C_0286CC_PERSP_CENTER_ENA;
                shader->config.spi_ps_input_ena &= C_0286CC_PERSP_CENTROID_ENA;
                shader->config.spi_ps_input_ena |= S_0286CC_PERSP_SAMPLE_ENA(1);
        }
        if (shader->key.ps.prolog.force_linear_sample_interp &&
            (G_0286CC_LINEAR_CENTER_ENA(shader->config.spi_ps_input_ena) ||
             G_0286CC_LINEAR_CENTROID_ENA(shader->config.spi_ps_input_ena))) {
                shader->config.spi_ps_input_ena &= C_0286CC_LINEAR_CENTER_ENA;
                shader->config.spi_ps_input_ena &= C_0286CC_LINEAR_CENTROID_ENA;
                shader->config.spi_ps_input_ena |= S_0286CC_LINEAR_SAMPLE_ENA(1);
        }
        if (shader->key.ps.prolog.force_persp_center_interp &&
            (G_0286CC_PERSP_SAMPLE_ENA(shader->config.spi_ps_input_ena) ||
             G_0286CC_PERSP_CENTROID_ENA(shader->config.spi_ps_input_ena))) {
                shader->config.spi_ps_input_ena &= C_0286CC_PERSP_SAMPLE_ENA;
                shader->config.spi_ps_input_ena &= C_0286CC_PERSP_CENTROID_ENA;
                shader->config.spi_ps_input_ena |= S_0286CC_PERSP_CENTER_ENA(1);
        }
        if (shader->key.ps.prolog.force_linear_center_interp &&
            (G_0286CC_LINEAR_SAMPLE_ENA(shader->config.spi_ps_input_ena) ||
             G_0286CC_LINEAR_CENTROID_ENA(shader->config.spi_ps_input_ena))) {
                shader->config.spi_ps_input_ena &= C_0286CC_LINEAR_SAMPLE_ENA;
                shader->config.spi_ps_input_ena &= C_0286CC_LINEAR_CENTROID_ENA;
                shader->config.spi_ps_input_ena |= S_0286CC_LINEAR_CENTER_ENA(1);
        }

        /* POW_W_FLOAT requires that one of the perspective weights is enabled. */
        if (G_0286CC_POS_W_FLOAT_ENA(shader->config.spi_ps_input_ena) &&
            !(shader->config.spi_ps_input_ena & 0xf)) {
                shader->config.spi_ps_input_ena |= S_0286CC_PERSP_CENTER_ENA(1);
                assert(G_0286CC_PERSP_CENTER_ENA(shader->config.spi_ps_input_addr));
        }

        /* At least one pair of interpolation weights must be enabled. */
        if (!(shader->config.spi_ps_input_ena & 0x7f)) {
                shader->config.spi_ps_input_ena |= S_0286CC_LINEAR_CENTER_ENA(1);
                assert(G_0286CC_LINEAR_CENTER_ENA(shader->config.spi_ps_input_addr));
        }

        /* The sample mask input is always enabled, because the API shader always
         * passes it through to the epilog. Disable it here if it's unused.
         */
        if (!shader->key.ps.epilog.poly_line_smoothing &&
            !shader->selector->info.reads_samplemask)
                shader->config.spi_ps_input_ena &= C_0286CC_SAMPLE_COVERAGE_ENA;

        return true;
}

static void si_fix_num_sgprs(struct si_shader *shader)
{
        unsigned min_sgprs = shader->info.num_input_sgprs + 2; /* VCC */

        shader->config.num_sgprs = MAX2(shader->config.num_sgprs, min_sgprs);
}

int si_shader_create(struct si_screen *sscreen, LLVMTargetMachineRef tm,
                     struct si_shader *shader,
                     struct pipe_debug_callback *debug)
{
        struct si_shader *mainp = shader->selector->main_shader_part;
        int r;

        /* LS, ES, VS are compiled on demand if the main part hasn't been
         * compiled for that stage.
         */
        if (!mainp ||
            (shader->selector->type == PIPE_SHADER_VERTEX &&
             (shader->key.vs.as_es != mainp->key.vs.as_es ||
              shader->key.vs.as_ls != mainp->key.vs.as_ls)) ||
            (shader->selector->type == PIPE_SHADER_TESS_EVAL &&
             shader->key.tes.as_es != mainp->key.tes.as_es) ||
            (shader->selector->type == PIPE_SHADER_TESS_CTRL &&
             shader->key.tcs.epilog.inputs_to_copy) ||
            shader->selector->type == PIPE_SHADER_COMPUTE) {
                /* Monolithic shader (compiled as a whole, has many variants,
                 * may take a long time to compile).
                 */
                r = si_compile_tgsi_shader(sscreen, tm, shader, true, debug);
                if (r)
                        return r;
        } else {
                /* The shader consists of 2-3 parts:
                 *
                 * - the middle part is the user shader, it has 1 variant only
                 *   and it was compiled during the creation of the shader
                 *   selector
                 * - the prolog part is inserted at the beginning
                 * - the epilog part is inserted at the end
                 *
                 * The prolog and epilog have many (but simple) variants.
                 */

                /* Copy the compiled TGSI shader data over. */
                shader->is_binary_shared = true;
                shader->binary = mainp->binary;
                shader->config = mainp->config;
                shader->info.num_input_sgprs = mainp->info.num_input_sgprs;
                shader->info.num_input_vgprs = mainp->info.num_input_vgprs;
                shader->info.face_vgpr_index = mainp->info.face_vgpr_index;
                memcpy(shader->info.vs_output_param_offset,
                       mainp->info.vs_output_param_offset,
                       sizeof(mainp->info.vs_output_param_offset));
                shader->info.uses_instanceid = mainp->info.uses_instanceid;
                shader->info.nr_pos_exports = mainp->info.nr_pos_exports;
                shader->info.nr_param_exports = mainp->info.nr_param_exports;

                /* Select prologs and/or epilogs. */
                switch (shader->selector->type) {
                case PIPE_SHADER_VERTEX:
                        if (!si_shader_select_vs_parts(sscreen, tm, shader, debug))
                                return -1;
                        break;
                case PIPE_SHADER_TESS_CTRL:
                        if (!si_shader_select_tcs_parts(sscreen, tm, shader, debug))
                                return -1;
                        break;
                case PIPE_SHADER_TESS_EVAL:
                        if (!si_shader_select_tes_parts(sscreen, tm, shader, debug))
                                return -1;
                        break;
                case PIPE_SHADER_FRAGMENT:
                        if (!si_shader_select_ps_parts(sscreen, tm, shader, debug))
                                return -1;

                        /* Make sure we have at least as many VGPRs as there
                         * are allocated inputs.
                         */
                        shader->config.num_vgprs = MAX2(shader->config.num_vgprs,
                                                        shader->info.num_input_vgprs);
                        break;
                }

                /* Update SGPR and VGPR counts. */
                if (shader->prolog) {
                        shader->config.num_sgprs = MAX2(shader->config.num_sgprs,
                                                        shader->prolog->config.num_sgprs);
                        shader->config.num_vgprs = MAX2(shader->config.num_vgprs,
                                                        shader->prolog->config.num_vgprs);
                }
                if (shader->epilog) {
                        shader->config.num_sgprs = MAX2(shader->config.num_sgprs,
                                                        shader->epilog->config.num_sgprs);
                        shader->config.num_vgprs = MAX2(shader->config.num_vgprs,
                                                        shader->epilog->config.num_vgprs);
                }
        }

        si_fix_num_sgprs(shader);
        si_shader_dump(sscreen, shader, debug, shader->selector->info.processor,
                       stderr);

        /* Upload. */
        r = si_shader_binary_upload(sscreen, shader);
        if (r) {
                fprintf(stderr, "LLVM failed to upload shader\n");
                return r;
        }

        return 0;
}

void si_shader_destroy(struct si_shader *shader)
{
        if (shader->gs_copy_shader) {
                si_shader_destroy(shader->gs_copy_shader);
                FREE(shader->gs_copy_shader);
        }

        if (shader->scratch_bo)
                r600_resource_reference(&shader->scratch_bo, NULL);

        r600_resource_reference(&shader->bo, NULL);

        if (!shader->is_binary_shared)
                radeon_shader_binary_clean(&shader->binary);
}