radv/gfx10: Simplify output mask handling for NGG GS.

[mesa.git] / src / amd / vulkan / radv_nir_to_llvm.c

/*
 * Copyright © 2016 Red Hat.
 * Copyright © 2016 Bas Nieuwenhuizen
 *
 * based in part on anv driver which is:
 * Copyright © 2015 Intel Corporation
 *
 * 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
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * 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 NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS 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.
 */

#include "radv_private.h"
#include "radv_shader.h"
#include "radv_shader_helper.h"
#include "nir/nir.h"

#include <llvm-c/Core.h>
#include <llvm-c/TargetMachine.h>
#include <llvm-c/Transforms/Scalar.h>
#include <llvm-c/Transforms/Utils.h>

#include "sid.h"
#include "ac_binary.h"
#include "ac_llvm_util.h"
#include "ac_llvm_build.h"
#include "ac_shader_abi.h"
#include "ac_shader_util.h"
#include "ac_exp_param.h"

#define RADEON_LLVM_MAX_INPUTS (VARYING_SLOT_VAR31 + 1)

struct radv_shader_context {
        struct ac_llvm_context ac;
        const struct radv_nir_compiler_options *options;
        struct radv_shader_variant_info *shader_info;
        struct ac_shader_abi abi;

        unsigned max_workgroup_size;
        LLVMContextRef context;
        LLVMValueRef main_function;

        LLVMValueRef descriptor_sets[RADV_UD_MAX_SETS];
        LLVMValueRef ring_offsets;

        LLVMValueRef vertex_buffers;
        LLVMValueRef rel_auto_id;
        LLVMValueRef vs_prim_id;
        LLVMValueRef es2gs_offset;

        LLVMValueRef oc_lds;
        LLVMValueRef merged_wave_info;
        LLVMValueRef tess_factor_offset;
        LLVMValueRef tes_rel_patch_id;
        LLVMValueRef tes_u;
        LLVMValueRef tes_v;

        /* HW GS */
        /* On gfx10:
         *  - bits 0..10: ordered_wave_id
         *  - bits 12..20: number of vertices in group
         *  - bits 22..30: number of primitives in group
         */
        LLVMValueRef gs_tg_info;
        LLVMValueRef gs2vs_offset;
        LLVMValueRef gs_wave_id;
        LLVMValueRef gs_vtx_offset[6];

        LLVMValueRef esgs_ring;
        LLVMValueRef gsvs_ring[4];
        LLVMValueRef hs_ring_tess_offchip;
        LLVMValueRef hs_ring_tess_factor;

        LLVMValueRef persp_sample, persp_center, persp_centroid;
        LLVMValueRef linear_sample, linear_center, linear_centroid;

        /* Streamout */
        LLVMValueRef streamout_buffers;
        LLVMValueRef streamout_write_idx;
        LLVMValueRef streamout_config;
        LLVMValueRef streamout_offset[4];

        gl_shader_stage stage;

        LLVMValueRef inputs[RADEON_LLVM_MAX_INPUTS * 4];
        uint64_t float16_shaded_mask;

        uint64_t input_mask;
        uint64_t output_mask;

        bool is_gs_copy_shader;
        LLVMValueRef gs_next_vertex[4];
        LLVMValueRef gs_curprim_verts[4];
        LLVMValueRef gs_generated_prims[4];
        LLVMValueRef gs_ngg_emit;
        LLVMValueRef gs_ngg_scratch;
        unsigned gs_max_out_vertices;
        unsigned gs_output_prim;

        unsigned tes_primitive_mode;

        uint32_t tcs_patch_outputs_read;
        uint64_t tcs_outputs_read;
        uint32_t tcs_vertices_per_patch;
        uint32_t tcs_num_inputs;
        uint32_t tcs_num_patches;
        uint32_t max_gsvs_emit_size;
        uint32_t gsvs_vertex_size;

        LLVMValueRef vertexptr; /* GFX10 only */
};

enum radeon_llvm_calling_convention {
        RADEON_LLVM_AMDGPU_VS = 87,
        RADEON_LLVM_AMDGPU_GS = 88,
        RADEON_LLVM_AMDGPU_PS = 89,
        RADEON_LLVM_AMDGPU_CS = 90,
        RADEON_LLVM_AMDGPU_HS = 93,
};

static inline struct radv_shader_context *
radv_shader_context_from_abi(struct ac_shader_abi *abi)
{
        struct radv_shader_context *ctx = NULL;
        return container_of(abi, ctx, abi);
}

struct ac_build_if_state
{
        struct radv_shader_context *ctx;
        LLVMValueRef condition;
        LLVMBasicBlockRef entry_block;
        LLVMBasicBlockRef true_block;
        LLVMBasicBlockRef false_block;
        LLVMBasicBlockRef merge_block;
};

static LLVMBasicBlockRef
ac_build_insert_new_block(struct radv_shader_context *ctx, const char *name)
{
        LLVMBasicBlockRef current_block;
        LLVMBasicBlockRef next_block;
        LLVMBasicBlockRef new_block;

        /* get current basic block */
        current_block = LLVMGetInsertBlock(ctx->ac.builder);

        /* chqeck if there's another block after this one */
        next_block = LLVMGetNextBasicBlock(current_block);
        if (next_block) {
                /* insert the new block before the next block */
                new_block = LLVMInsertBasicBlockInContext(ctx->context, next_block, name);
        }
        else {
                /* append new block after current block */
                LLVMValueRef function = LLVMGetBasicBlockParent(current_block);
                new_block = LLVMAppendBasicBlockInContext(ctx->context, function, name);
        }
        return new_block;
}

static void
ac_nir_build_if(struct ac_build_if_state *ifthen,
                struct radv_shader_context *ctx,
                LLVMValueRef condition)
{
        LLVMBasicBlockRef block = LLVMGetInsertBlock(ctx->ac.builder);

        memset(ifthen, 0, sizeof *ifthen);
        ifthen->ctx = ctx;
        ifthen->condition = condition;
        ifthen->entry_block = block;

        /* create endif/merge basic block for the phi functions */
        ifthen->merge_block = ac_build_insert_new_block(ctx, "endif-block");

        /* create/insert true_block before merge_block */
        ifthen->true_block =
                LLVMInsertBasicBlockInContext(ctx->context,
                                              ifthen->merge_block,
                                              "if-true-block");

        /* successive code goes into the true block */
        LLVMPositionBuilderAtEnd(ctx->ac.builder, ifthen->true_block);
}

/**
 * End a conditional.
 */
static void
ac_nir_build_endif(struct ac_build_if_state *ifthen)
{
        LLVMBuilderRef builder = ifthen->ctx->ac.builder;

        /* Insert branch to the merge block from current block */
        LLVMBuildBr(builder, ifthen->merge_block);

        /*
         * Now patch in the various branch instructions.
         */

        /* Insert the conditional branch instruction at the end of entry_block */
        LLVMPositionBuilderAtEnd(builder, ifthen->entry_block);
        if (ifthen->false_block) {
                /* we have an else clause */
                LLVMBuildCondBr(builder, ifthen->condition,
                                ifthen->true_block, ifthen->false_block);
        }
        else {
                /* no else clause */
                LLVMBuildCondBr(builder, ifthen->condition,
                                ifthen->true_block, ifthen->merge_block);
        }

        /* Resume building code at end of the ifthen->merge_block */
        LLVMPositionBuilderAtEnd(builder, ifthen->merge_block);
}


static LLVMValueRef get_rel_patch_id(struct radv_shader_context *ctx)
{
        switch (ctx->stage) {
        case MESA_SHADER_TESS_CTRL:
                return ac_unpack_param(&ctx->ac, ctx->abi.tcs_rel_ids, 0, 8);
        case MESA_SHADER_TESS_EVAL:
                return ctx->tes_rel_patch_id;
                break;
        default:
                unreachable("Illegal stage");
        }
}

static unsigned
get_tcs_num_patches(struct radv_shader_context *ctx)
{
        unsigned num_tcs_input_cp = ctx->options->key.tcs.input_vertices;
        unsigned num_tcs_output_cp = ctx->tcs_vertices_per_patch;
        uint32_t input_vertex_size = ctx->tcs_num_inputs * 16;
        uint32_t input_patch_size = ctx->options->key.tcs.input_vertices * input_vertex_size;
        uint32_t num_tcs_outputs = util_last_bit64(ctx->shader_info->info.tcs.outputs_written);
        uint32_t num_tcs_patch_outputs = util_last_bit64(ctx->shader_info->info.tcs.patch_outputs_written);
        uint32_t output_vertex_size = num_tcs_outputs * 16;
        uint32_t pervertex_output_patch_size = ctx->tcs_vertices_per_patch * output_vertex_size;
        uint32_t output_patch_size = pervertex_output_patch_size + num_tcs_patch_outputs * 16;
        unsigned num_patches;
        unsigned hardware_lds_size;

        /* Ensure that we only need one wave per SIMD so we don't need to check
         * resource usage. Also ensures that the number of tcs in and out
         * vertices per threadgroup are at most 256.
         */
        num_patches = 64 / MAX2(num_tcs_input_cp, num_tcs_output_cp) * 4;
        /* Make sure that the data fits in LDS. This assumes the shaders only
         * use LDS for the inputs and outputs.
         */
        hardware_lds_size = 32768;

        /* Looks like STONEY hangs if we use more than 32 KiB LDS in a single
         * threadgroup, even though there is more than 32 KiB LDS.
         *
         * Test: dEQP-VK.tessellation.shader_input_output.barrier
         */
        if (ctx->options->chip_class >= GFX7 && ctx->options->family != CHIP_STONEY)
                hardware_lds_size = 65536;

        num_patches = MIN2(num_patches, hardware_lds_size / (input_patch_size + output_patch_size));
        /* Make sure the output data fits in the offchip buffer */
        num_patches = MIN2(num_patches, (ctx->options->tess_offchip_block_dw_size * 4) / output_patch_size);
        /* Not necessary for correctness, but improves performance. The
         * specific value is taken from the proprietary driver.
         */
        num_patches = MIN2(num_patches, 40);

        /* GFX6 bug workaround - limit LS-HS threadgroups to only one wave. */
        if (ctx->options->chip_class == GFX6) {
                unsigned one_wave = 64 / MAX2(num_tcs_input_cp, num_tcs_output_cp);
                num_patches = MIN2(num_patches, one_wave);
        }
        return num_patches;
}

static unsigned
calculate_tess_lds_size(struct radv_shader_context *ctx)
{
        unsigned num_tcs_input_cp = ctx->options->key.tcs.input_vertices;
        unsigned num_tcs_output_cp;
        unsigned num_tcs_outputs, num_tcs_patch_outputs;
        unsigned input_vertex_size, output_vertex_size;
        unsigned input_patch_size, output_patch_size;
        unsigned pervertex_output_patch_size;
        unsigned output_patch0_offset;
        unsigned num_patches;
        unsigned lds_size;

        num_tcs_output_cp = ctx->tcs_vertices_per_patch;
        num_tcs_outputs = util_last_bit64(ctx->shader_info->info.tcs.outputs_written);
        num_tcs_patch_outputs = util_last_bit64(ctx->shader_info->info.tcs.patch_outputs_written);

        input_vertex_size = ctx->tcs_num_inputs * 16;
        output_vertex_size = num_tcs_outputs * 16;

        input_patch_size = num_tcs_input_cp * input_vertex_size;

        pervertex_output_patch_size = num_tcs_output_cp * output_vertex_size;
        output_patch_size = pervertex_output_patch_size + num_tcs_patch_outputs * 16;

        num_patches = ctx->tcs_num_patches;
        output_patch0_offset = input_patch_size * num_patches;

        lds_size = output_patch0_offset + output_patch_size * num_patches;
        return lds_size;
}

/* 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 radv_shader_context *ctx)
{
        assert (ctx->stage == MESA_SHADER_TESS_CTRL);
        uint32_t input_vertex_size = ctx->tcs_num_inputs * 16;
        uint32_t input_patch_size = ctx->options->key.tcs.input_vertices * input_vertex_size;

        input_patch_size /= 4;
        return LLVMConstInt(ctx->ac.i32, input_patch_size, false);
}

static LLVMValueRef
get_tcs_out_patch_stride(struct radv_shader_context *ctx)
{
        uint32_t num_tcs_outputs = util_last_bit64(ctx->shader_info->info.tcs.outputs_written);
        uint32_t num_tcs_patch_outputs = util_last_bit64(ctx->shader_info->info.tcs.patch_outputs_written);
        uint32_t output_vertex_size = num_tcs_outputs * 16;
        uint32_t pervertex_output_patch_size = ctx->tcs_vertices_per_patch * output_vertex_size;
        uint32_t output_patch_size = pervertex_output_patch_size + num_tcs_patch_outputs * 16;
        output_patch_size /= 4;
        return LLVMConstInt(ctx->ac.i32, output_patch_size, false);
}

static LLVMValueRef
get_tcs_out_vertex_stride(struct radv_shader_context *ctx)
{
        uint32_t num_tcs_outputs = util_last_bit64(ctx->shader_info->info.tcs.outputs_written);
        uint32_t output_vertex_size = num_tcs_outputs * 16;
        output_vertex_size /= 4;
        return LLVMConstInt(ctx->ac.i32, output_vertex_size, false);
}

static LLVMValueRef
get_tcs_out_patch0_offset(struct radv_shader_context *ctx)
{
        assert (ctx->stage == MESA_SHADER_TESS_CTRL);
        uint32_t input_vertex_size = ctx->tcs_num_inputs * 16;
        uint32_t input_patch_size = ctx->options->key.tcs.input_vertices * input_vertex_size;
        uint32_t output_patch0_offset = input_patch_size;
        unsigned num_patches = ctx->tcs_num_patches;

        output_patch0_offset *= num_patches;
        output_patch0_offset /= 4;
        return LLVMConstInt(ctx->ac.i32, output_patch0_offset, false);
}

static LLVMValueRef
get_tcs_out_patch0_patch_data_offset(struct radv_shader_context *ctx)
{
        assert (ctx->stage == MESA_SHADER_TESS_CTRL);
        uint32_t input_vertex_size = ctx->tcs_num_inputs * 16;
        uint32_t input_patch_size = ctx->options->key.tcs.input_vertices * input_vertex_size;
        uint32_t output_patch0_offset = input_patch_size;

        uint32_t num_tcs_outputs = util_last_bit64(ctx->shader_info->info.tcs.outputs_written);
        uint32_t output_vertex_size = num_tcs_outputs * 16;
        uint32_t pervertex_output_patch_size = ctx->tcs_vertices_per_patch * output_vertex_size;
        unsigned num_patches = ctx->tcs_num_patches;

        output_patch0_offset *= num_patches;
        output_patch0_offset += pervertex_output_patch_size;
        output_patch0_offset /= 4;
        return LLVMConstInt(ctx->ac.i32, output_patch0_offset, false);
}

static LLVMValueRef
get_tcs_in_current_patch_offset(struct radv_shader_context *ctx)
{
        LLVMValueRef patch_stride = get_tcs_in_patch_stride(ctx);
        LLVMValueRef rel_patch_id = get_rel_patch_id(ctx);

        return LLVMBuildMul(ctx->ac.builder, patch_stride, rel_patch_id, "");
}

static LLVMValueRef
get_tcs_out_current_patch_offset(struct radv_shader_context *ctx)
{
        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 ac_build_imad(&ctx->ac, patch_stride, rel_patch_id,
                             patch0_offset);
}

static LLVMValueRef
get_tcs_out_current_patch_data_offset(struct radv_shader_context *ctx)
{
        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 ac_build_imad(&ctx->ac, patch_stride, rel_patch_id,
                             patch0_patch_data_offset);
}

#define MAX_ARGS 64
struct arg_info {
        LLVMTypeRef types[MAX_ARGS];
        LLVMValueRef *assign[MAX_ARGS];
        uint8_t count;
        uint8_t sgpr_count;
        uint8_t num_sgprs_used;
        uint8_t num_vgprs_used;
};

enum ac_arg_regfile {
        ARG_SGPR,
        ARG_VGPR,
};

static void
add_arg(struct arg_info *info, enum ac_arg_regfile regfile, LLVMTypeRef type,
        LLVMValueRef *param_ptr)
{
        assert(info->count < MAX_ARGS);

        info->assign[info->count] = param_ptr;
        info->types[info->count] = type;
        info->count++;

        if (regfile == ARG_SGPR) {
                info->num_sgprs_used += ac_get_type_size(type) / 4;
                info->sgpr_count++;
        } else {
                assert(regfile == ARG_VGPR);
                info->num_vgprs_used += ac_get_type_size(type) / 4;
        }
}

static void assign_arguments(LLVMValueRef main_function,
                             struct arg_info *info)
{
        unsigned i;
        for (i = 0; i < info->count; i++) {
                if (info->assign[i])
                        *info->assign[i] = LLVMGetParam(main_function, i);
        }
}

static LLVMValueRef
create_llvm_function(LLVMContextRef ctx, LLVMModuleRef module,
                     LLVMBuilderRef builder, LLVMTypeRef *return_types,
                     unsigned num_return_elems,
                     struct arg_info *args,
                     unsigned max_workgroup_size,
                     const struct radv_nir_compiler_options *options)
{
        LLVMTypeRef main_function_type, ret_type;
        LLVMBasicBlockRef main_function_body;

        if (num_return_elems)
                ret_type = LLVMStructTypeInContext(ctx, return_types,
                                                   num_return_elems, true);
        else
                ret_type = LLVMVoidTypeInContext(ctx);

        /* Setup the function */
        main_function_type =
            LLVMFunctionType(ret_type, args->types, args->count, 0);
        LLVMValueRef main_function =
            LLVMAddFunction(module, "main", main_function_type);
        main_function_body =
            LLVMAppendBasicBlockInContext(ctx, main_function, "main_body");
        LLVMPositionBuilderAtEnd(builder, main_function_body);

        LLVMSetFunctionCallConv(main_function, RADEON_LLVM_AMDGPU_CS);
        for (unsigned i = 0; i < args->sgpr_count; ++i) {
                LLVMValueRef P = LLVMGetParam(main_function, i);

                ac_add_function_attr(ctx, main_function, i + 1, AC_FUNC_ATTR_INREG);

                if (LLVMGetTypeKind(LLVMTypeOf(P)) == LLVMPointerTypeKind) {
                        ac_add_function_attr(ctx, main_function, i + 1, AC_FUNC_ATTR_NOALIAS);
                        ac_add_attr_dereferenceable(P, UINT64_MAX);
                }
        }

        if (options->address32_hi) {
                ac_llvm_add_target_dep_function_attr(main_function,
                                                     "amdgpu-32bit-address-high-bits",
                                                     options->address32_hi);
        }

        ac_llvm_set_workgroup_size(main_function, max_workgroup_size);

        if (options->unsafe_math) {
                /* These were copied from some LLVM test. */
                LLVMAddTargetDependentFunctionAttr(main_function,
                                                   "less-precise-fpmad",
                                                   "true");
                LLVMAddTargetDependentFunctionAttr(main_function,
                                                   "no-infs-fp-math",
                                                   "true");
                LLVMAddTargetDependentFunctionAttr(main_function,
                                                   "no-nans-fp-math",
                                                   "true");
                LLVMAddTargetDependentFunctionAttr(main_function,
                                                   "unsafe-fp-math",
                                                   "true");
                LLVMAddTargetDependentFunctionAttr(main_function,
                                           "no-signed-zeros-fp-math",
                                           "true");
        }
        return main_function;
}


static void
set_loc(struct radv_userdata_info *ud_info, uint8_t *sgpr_idx,
        uint8_t num_sgprs)
{
        ud_info->sgpr_idx = *sgpr_idx;
        ud_info->num_sgprs = num_sgprs;
        *sgpr_idx += num_sgprs;
}

static void
set_loc_shader(struct radv_shader_context *ctx, int idx, uint8_t *sgpr_idx,
               uint8_t num_sgprs)
{
        struct radv_userdata_info *ud_info =
                &ctx->shader_info->user_sgprs_locs.shader_data[idx];
        assert(ud_info);

        set_loc(ud_info, sgpr_idx, num_sgprs);
}

static void
set_loc_shader_ptr(struct radv_shader_context *ctx, int idx, uint8_t *sgpr_idx)
{
        bool use_32bit_pointers = idx != AC_UD_SCRATCH_RING_OFFSETS;

        set_loc_shader(ctx, idx, sgpr_idx, use_32bit_pointers ? 1 : 2);
}

static void
set_loc_desc(struct radv_shader_context *ctx, int idx, uint8_t *sgpr_idx)
{
        struct radv_userdata_locations *locs =
                &ctx->shader_info->user_sgprs_locs;
        struct radv_userdata_info *ud_info = &locs->descriptor_sets[idx];
        assert(ud_info);

        set_loc(ud_info, sgpr_idx, 1);

        locs->descriptor_sets_enabled |= 1 << idx;
}

struct user_sgpr_info {
        bool need_ring_offsets;
        bool indirect_all_descriptor_sets;
        uint8_t remaining_sgprs;
};

static bool needs_view_index_sgpr(struct radv_shader_context *ctx,
                                  gl_shader_stage stage)
{
        switch (stage) {
        case MESA_SHADER_VERTEX:
                if (ctx->shader_info->info.needs_multiview_view_index ||
                    (!ctx->options->key.vs_common_out.as_es && !ctx->options->key.vs_common_out.as_ls && ctx->options->key.has_multiview_view_index))
                        return true;
                break;
        case MESA_SHADER_TESS_EVAL:
                if (ctx->shader_info->info.needs_multiview_view_index || (!ctx->options->key.vs_common_out.as_es && ctx->options->key.has_multiview_view_index))
                        return true;
                break;
        case MESA_SHADER_GEOMETRY:
        case MESA_SHADER_TESS_CTRL:
                if (ctx->shader_info->info.needs_multiview_view_index)
                        return true;
                break;
        default:
                break;
        }
        return false;
}

static uint8_t
count_vs_user_sgprs(struct radv_shader_context *ctx)
{
        uint8_t count = 0;

        if (ctx->shader_info->info.vs.has_vertex_buffers)
                count++;
        count += ctx->shader_info->info.vs.needs_draw_id ? 3 : 2;

        return count;
}

static void allocate_inline_push_consts(struct radv_shader_context *ctx,
                                        struct user_sgpr_info *user_sgpr_info)
{
        uint8_t remaining_sgprs = user_sgpr_info->remaining_sgprs;

        /* Only supported if shaders use push constants. */
        if (ctx->shader_info->info.min_push_constant_used == UINT8_MAX)
                return;

        /* Only supported if shaders don't have indirect push constants. */
        if (ctx->shader_info->info.has_indirect_push_constants)
                return;

        /* Only supported for 32-bit push constants. */
        if (!ctx->shader_info->info.has_only_32bit_push_constants)
                return;

        uint8_t num_push_consts =
                (ctx->shader_info->info.max_push_constant_used -
                 ctx->shader_info->info.min_push_constant_used) / 4;

        /* Check if the number of user SGPRs is large enough. */
        if (num_push_consts < remaining_sgprs) {
                ctx->shader_info->info.num_inline_push_consts = num_push_consts;
        } else {
                ctx->shader_info->info.num_inline_push_consts = remaining_sgprs;
        }

        /* Clamp to the maximum number of allowed inlined push constants. */
        if (ctx->shader_info->info.num_inline_push_consts > AC_MAX_INLINE_PUSH_CONSTS)
                ctx->shader_info->info.num_inline_push_consts = AC_MAX_INLINE_PUSH_CONSTS;

        if (ctx->shader_info->info.num_inline_push_consts == num_push_consts &&
            !ctx->shader_info->info.loads_dynamic_offsets) {
                /* Disable the default push constants path if all constants are
                 * inlined and if shaders don't use dynamic descriptors.
                 */
                ctx->shader_info->info.loads_push_constants = false;
        }

        ctx->shader_info->info.base_inline_push_consts =
                ctx->shader_info->info.min_push_constant_used / 4;
}

static void allocate_user_sgprs(struct radv_shader_context *ctx,
                                gl_shader_stage stage,
                                bool has_previous_stage,
                                gl_shader_stage previous_stage,
                                bool needs_view_index,
                                struct user_sgpr_info *user_sgpr_info)
{
        uint8_t user_sgpr_count = 0;

        memset(user_sgpr_info, 0, sizeof(struct user_sgpr_info));

        /* until we sort out scratch/global buffers always assign ring offsets for gs/vs/es */
        if (stage == MESA_SHADER_GEOMETRY ||
            stage == MESA_SHADER_VERTEX ||
            stage == MESA_SHADER_TESS_CTRL ||
            stage == MESA_SHADER_TESS_EVAL ||
            ctx->is_gs_copy_shader)
                user_sgpr_info->need_ring_offsets = true;

        if (stage == MESA_SHADER_FRAGMENT &&
            ctx->shader_info->info.ps.needs_sample_positions)
                user_sgpr_info->need_ring_offsets = true;

        /* 2 user sgprs will nearly always be allocated for scratch/rings */
        if (ctx->options->supports_spill || user_sgpr_info->need_ring_offsets) {
                user_sgpr_count += 2;
        }

        switch (stage) {
        case MESA_SHADER_COMPUTE:
                if (ctx->shader_info->info.cs.uses_grid_size)
                        user_sgpr_count += 3;
                break;
        case MESA_SHADER_FRAGMENT:
                user_sgpr_count += ctx->shader_info->info.ps.needs_sample_positions;
                break;
        case MESA_SHADER_VERTEX:
                if (!ctx->is_gs_copy_shader)
                        user_sgpr_count += count_vs_user_sgprs(ctx);
                break;
        case MESA_SHADER_TESS_CTRL:
                if (has_previous_stage) {
                        if (previous_stage == MESA_SHADER_VERTEX)
                                user_sgpr_count += count_vs_user_sgprs(ctx);
                }
                break;
        case MESA_SHADER_TESS_EVAL:
                break;
        case MESA_SHADER_GEOMETRY:
                if (has_previous_stage) {
                        if (previous_stage == MESA_SHADER_VERTEX) {
                                user_sgpr_count += count_vs_user_sgprs(ctx);
                        }
                }
                break;
        default:
                break;
        }

        if (needs_view_index)
                user_sgpr_count++;

        if (ctx->shader_info->info.loads_push_constants)
                user_sgpr_count++;

        if (ctx->streamout_buffers)
                user_sgpr_count++;

        uint32_t available_sgprs = ctx->options->chip_class >= GFX9 && stage != MESA_SHADER_COMPUTE ? 32 : 16;
        uint32_t remaining_sgprs = available_sgprs - user_sgpr_count;
        uint32_t num_desc_set =
                util_bitcount(ctx->shader_info->info.desc_set_used_mask);

        if (remaining_sgprs < num_desc_set) {
                user_sgpr_info->indirect_all_descriptor_sets = true;
                user_sgpr_info->remaining_sgprs = remaining_sgprs - 1;
        } else {
                user_sgpr_info->remaining_sgprs = remaining_sgprs - num_desc_set;
        }

        allocate_inline_push_consts(ctx, user_sgpr_info);
}

static void
declare_global_input_sgprs(struct radv_shader_context *ctx,
                           const struct user_sgpr_info *user_sgpr_info,
                           struct arg_info *args,
                           LLVMValueRef *desc_sets)
{
        LLVMTypeRef type = ac_array_in_const32_addr_space(ctx->ac.i8);

        /* 1 for each descriptor set */
        if (!user_sgpr_info->indirect_all_descriptor_sets) {
                uint32_t mask = ctx->shader_info->info.desc_set_used_mask;

                while (mask) {
                        int i = u_bit_scan(&mask);

                        add_arg(args, ARG_SGPR, type, &ctx->descriptor_sets[i]);
                }
        } else {
                add_arg(args, ARG_SGPR, ac_array_in_const32_addr_space(type),
                        desc_sets);
        }

        if (ctx->shader_info->info.loads_push_constants) {
                /* 1 for push constants and dynamic descriptors */
                add_arg(args, ARG_SGPR, type, &ctx->abi.push_constants);
        }

        for (unsigned i = 0; i < ctx->shader_info->info.num_inline_push_consts; i++) {
                add_arg(args, ARG_SGPR, ctx->ac.i32,
                        &ctx->abi.inline_push_consts[i]);
        }
        ctx->abi.num_inline_push_consts = ctx->shader_info->info.num_inline_push_consts;
        ctx->abi.base_inline_push_consts = ctx->shader_info->info.base_inline_push_consts;

        if (ctx->shader_info->info.so.num_outputs) {
                add_arg(args, ARG_SGPR,
                        ac_array_in_const32_addr_space(ctx->ac.v4i32),
                        &ctx->streamout_buffers);
        }
}

static void
declare_vs_specific_input_sgprs(struct radv_shader_context *ctx,
                                gl_shader_stage stage,
                                bool has_previous_stage,
                                gl_shader_stage previous_stage,
                                struct arg_info *args)
{
        if (!ctx->is_gs_copy_shader &&
            (stage == MESA_SHADER_VERTEX ||
             (has_previous_stage && previous_stage == MESA_SHADER_VERTEX))) {
                if (ctx->shader_info->info.vs.has_vertex_buffers) {
                        add_arg(args, ARG_SGPR,
                                ac_array_in_const32_addr_space(ctx->ac.v4i32),
                                &ctx->vertex_buffers);
                }
                add_arg(args, ARG_SGPR, ctx->ac.i32, &ctx->abi.base_vertex);
                add_arg(args, ARG_SGPR, ctx->ac.i32, &ctx->abi.start_instance);
                if (ctx->shader_info->info.vs.needs_draw_id) {
                        add_arg(args, ARG_SGPR, ctx->ac.i32, &ctx->abi.draw_id);
                }
        }
}

static void
declare_vs_input_vgprs(struct radv_shader_context *ctx, struct arg_info *args)
{
        add_arg(args, ARG_VGPR, ctx->ac.i32, &ctx->abi.vertex_id);
        if (!ctx->is_gs_copy_shader) {
                if (ctx->options->key.vs_common_out.as_ls) {
                        add_arg(args, ARG_VGPR, ctx->ac.i32, &ctx->rel_auto_id);
                        if (ctx->ac.chip_class >= GFX10) {
                                add_arg(args, ARG_VGPR, ctx->ac.i32, NULL); /* user vgpr */
                                add_arg(args, ARG_VGPR, ctx->ac.i32, &ctx->abi.instance_id);
                        } else {
                                add_arg(args, ARG_VGPR, ctx->ac.i32, &ctx->abi.instance_id);
                                add_arg(args, ARG_VGPR, ctx->ac.i32, NULL); /* unused */
                        }
                } else {
                        if (ctx->ac.chip_class >= GFX10) {
                                add_arg(args, ARG_VGPR, ctx->ac.i32, NULL); /* user vgpr */
                                add_arg(args, ARG_VGPR, ctx->ac.i32, NULL); /* user vgpr */
                                add_arg(args, ARG_VGPR, ctx->ac.i32, &ctx->abi.instance_id);
                        } else {
                                add_arg(args, ARG_VGPR, ctx->ac.i32, &ctx->abi.instance_id);
                                add_arg(args, ARG_VGPR, ctx->ac.i32, &ctx->vs_prim_id);
                                add_arg(args, ARG_VGPR, ctx->ac.i32, NULL); /* unused */
                        }
                }
        }
}

static void
declare_streamout_sgprs(struct radv_shader_context *ctx, gl_shader_stage stage,
                        struct arg_info *args)
{
        int i;

        if (ctx->ac.chip_class >= GFX10)
                return;

        /* Streamout SGPRs. */
        if (ctx->shader_info->info.so.num_outputs) {
                assert(stage == MESA_SHADER_VERTEX ||
                       stage == MESA_SHADER_TESS_EVAL);

                if (stage != MESA_SHADER_TESS_EVAL) {
                        add_arg(args, ARG_SGPR, ctx->ac.i32, &ctx->streamout_config);
                } else {
                        args->assign[args->count - 1] = &ctx->streamout_config;
                        args->types[args->count - 1] = ctx->ac.i32;
                }

                add_arg(args, ARG_SGPR, ctx->ac.i32, &ctx->streamout_write_idx);
        }

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

                add_arg(args, ARG_SGPR, ctx->ac.i32, &ctx->streamout_offset[i]);
        }
}

static void
declare_tes_input_vgprs(struct radv_shader_context *ctx, struct arg_info *args)
{
        add_arg(args, ARG_VGPR, ctx->ac.f32, &ctx->tes_u);
        add_arg(args, ARG_VGPR, ctx->ac.f32, &ctx->tes_v);
        add_arg(args, ARG_VGPR, ctx->ac.i32, &ctx->tes_rel_patch_id);
        add_arg(args, ARG_VGPR, ctx->ac.i32, &ctx->abi.tes_patch_id);
}

static void
set_global_input_locs(struct radv_shader_context *ctx,
                      const struct user_sgpr_info *user_sgpr_info,
                      LLVMValueRef desc_sets, uint8_t *user_sgpr_idx)
{
        uint32_t mask = ctx->shader_info->info.desc_set_used_mask;

        if (!user_sgpr_info->indirect_all_descriptor_sets) {
                while (mask) {
                        int i = u_bit_scan(&mask);

                        set_loc_desc(ctx, i, user_sgpr_idx);
                }
        } else {
                set_loc_shader_ptr(ctx, AC_UD_INDIRECT_DESCRIPTOR_SETS,
                                   user_sgpr_idx);

                while (mask) {
                        int i = u_bit_scan(&mask);

                        ctx->descriptor_sets[i] =
                                ac_build_load_to_sgpr(&ctx->ac, desc_sets,
                                                      LLVMConstInt(ctx->ac.i32, i, false));

                }

                ctx->shader_info->need_indirect_descriptor_sets = true;
        }

        if (ctx->shader_info->info.loads_push_constants) {
                set_loc_shader_ptr(ctx, AC_UD_PUSH_CONSTANTS, user_sgpr_idx);
        }

        if (ctx->shader_info->info.num_inline_push_consts) {
                set_loc_shader(ctx, AC_UD_INLINE_PUSH_CONSTANTS, user_sgpr_idx,
                               ctx->shader_info->info.num_inline_push_consts);
        }

        if (ctx->streamout_buffers) {
                set_loc_shader_ptr(ctx, AC_UD_STREAMOUT_BUFFERS,
                               user_sgpr_idx);
        }
}

static void
set_vs_specific_input_locs(struct radv_shader_context *ctx,
                           gl_shader_stage stage, bool has_previous_stage,
                           gl_shader_stage previous_stage,
                           uint8_t *user_sgpr_idx)
{
        if (!ctx->is_gs_copy_shader &&
            (stage == MESA_SHADER_VERTEX ||
             (has_previous_stage && previous_stage == MESA_SHADER_VERTEX))) {
                if (ctx->shader_info->info.vs.has_vertex_buffers) {
                        set_loc_shader_ptr(ctx, AC_UD_VS_VERTEX_BUFFERS,
                                           user_sgpr_idx);
                }

                unsigned vs_num = 2;
                if (ctx->shader_info->info.vs.needs_draw_id)
                        vs_num++;

                set_loc_shader(ctx, AC_UD_VS_BASE_VERTEX_START_INSTANCE,
                               user_sgpr_idx, vs_num);
        }
}

static void set_llvm_calling_convention(LLVMValueRef func,
                                        gl_shader_stage stage)
{
        enum radeon_llvm_calling_convention calling_conv;

        switch (stage) {
        case MESA_SHADER_VERTEX:
        case MESA_SHADER_TESS_EVAL:
                calling_conv = RADEON_LLVM_AMDGPU_VS;
                break;
        case MESA_SHADER_GEOMETRY:
                calling_conv = RADEON_LLVM_AMDGPU_GS;
                break;
        case MESA_SHADER_TESS_CTRL:
                calling_conv = RADEON_LLVM_AMDGPU_HS;
                break;
        case MESA_SHADER_FRAGMENT:
                calling_conv = RADEON_LLVM_AMDGPU_PS;
                break;
        case MESA_SHADER_COMPUTE:
                calling_conv = RADEON_LLVM_AMDGPU_CS;
                break;
        default:
                unreachable("Unhandle shader type");
        }

        LLVMSetFunctionCallConv(func, calling_conv);
}

/* Returns whether the stage is a stage that can be directly before the GS */
static bool is_pre_gs_stage(gl_shader_stage stage)
{
        return stage == MESA_SHADER_VERTEX || stage == MESA_SHADER_TESS_EVAL;
}

static void create_function(struct radv_shader_context *ctx,
                            gl_shader_stage stage,
                            bool has_previous_stage,
                            gl_shader_stage previous_stage)
{
        uint8_t user_sgpr_idx;
        struct user_sgpr_info user_sgpr_info;
        struct arg_info args = {};
        LLVMValueRef desc_sets;
        bool needs_view_index = needs_view_index_sgpr(ctx, stage);

        if (ctx->ac.chip_class >= GFX10) {
                if (is_pre_gs_stage(stage) && ctx->options->key.vs_common_out.as_ngg) {
                        /* On GFX10, VS is merged into GS for NGG. */
                        previous_stage = stage;
                        stage = MESA_SHADER_GEOMETRY;
                        has_previous_stage = true;
                }
        }

        allocate_user_sgprs(ctx, stage, has_previous_stage,
                            previous_stage, needs_view_index, &user_sgpr_info);

        if (user_sgpr_info.need_ring_offsets && !ctx->options->supports_spill) {
                add_arg(&args, ARG_SGPR, ac_array_in_const_addr_space(ctx->ac.v4i32),
                        &ctx->ring_offsets);
        }

        switch (stage) {
        case MESA_SHADER_COMPUTE:
                declare_global_input_sgprs(ctx, &user_sgpr_info, &args,
                                           &desc_sets);

                if (ctx->shader_info->info.cs.uses_grid_size) {
                        add_arg(&args, ARG_SGPR, ctx->ac.v3i32,
                                &ctx->abi.num_work_groups);
                }

                for (int i = 0; i < 3; i++) {
                        ctx->abi.workgroup_ids[i] = NULL;
                        if (ctx->shader_info->info.cs.uses_block_id[i]) {
                                add_arg(&args, ARG_SGPR, ctx->ac.i32,
                                        &ctx->abi.workgroup_ids[i]);
                        }
                }

                if (ctx->shader_info->info.cs.uses_local_invocation_idx)
                        add_arg(&args, ARG_SGPR, ctx->ac.i32, &ctx->abi.tg_size);
                add_arg(&args, ARG_VGPR, ctx->ac.v3i32,
                        &ctx->abi.local_invocation_ids);
                break;
        case MESA_SHADER_VERTEX:
                declare_global_input_sgprs(ctx, &user_sgpr_info, &args,
                                           &desc_sets);

                declare_vs_specific_input_sgprs(ctx, stage, has_previous_stage,
                                                previous_stage, &args);

                if (needs_view_index)
                        add_arg(&args, ARG_SGPR, ctx->ac.i32,
                                &ctx->abi.view_index);
                if (ctx->options->key.vs_common_out.as_es) {
                        add_arg(&args, ARG_SGPR, ctx->ac.i32,
                                &ctx->es2gs_offset);
                } else if (ctx->options->key.vs_common_out.as_ls) {
                        /* no extra parameters */
                } else {
                        declare_streamout_sgprs(ctx, stage, &args);
                }

                declare_vs_input_vgprs(ctx, &args);
                break;
        case MESA_SHADER_TESS_CTRL:
                if (has_previous_stage) {
                        // First 6 system regs
                        add_arg(&args, ARG_SGPR, ctx->ac.i32, &ctx->oc_lds);
                        add_arg(&args, ARG_SGPR, ctx->ac.i32,
                                &ctx->merged_wave_info);
                        add_arg(&args, ARG_SGPR, ctx->ac.i32,
                                &ctx->tess_factor_offset);

                        add_arg(&args, ARG_SGPR, ctx->ac.i32, NULL); // scratch offset
                        add_arg(&args, ARG_SGPR, ctx->ac.i32, NULL); // unknown
                        add_arg(&args, ARG_SGPR, ctx->ac.i32, NULL); // unknown

                        declare_global_input_sgprs(ctx, &user_sgpr_info, &args,
                                                   &desc_sets);

                        declare_vs_specific_input_sgprs(ctx, stage,
                                                        has_previous_stage,
                                                        previous_stage, &args);

                        if (needs_view_index)
                                add_arg(&args, ARG_SGPR, ctx->ac.i32,
                                        &ctx->abi.view_index);

                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->abi.tcs_patch_id);
                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->abi.tcs_rel_ids);

                        declare_vs_input_vgprs(ctx, &args);
                } else {
                        declare_global_input_sgprs(ctx, &user_sgpr_info, &args,
                                                   &desc_sets);

                        if (needs_view_index)
                                add_arg(&args, ARG_SGPR, ctx->ac.i32,
                                        &ctx->abi.view_index);

                        add_arg(&args, ARG_SGPR, ctx->ac.i32, &ctx->oc_lds);
                        add_arg(&args, ARG_SGPR, ctx->ac.i32,
                                &ctx->tess_factor_offset);
                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->abi.tcs_patch_id);
                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->abi.tcs_rel_ids);
                }
                break;
        case MESA_SHADER_TESS_EVAL:
                declare_global_input_sgprs(ctx, &user_sgpr_info, &args,
                                           &desc_sets);

                if (needs_view_index)
                        add_arg(&args, ARG_SGPR, ctx->ac.i32,
                                &ctx->abi.view_index);

                if (ctx->options->key.vs_common_out.as_es) {
                        add_arg(&args, ARG_SGPR, ctx->ac.i32, &ctx->oc_lds);
                        add_arg(&args, ARG_SGPR, ctx->ac.i32, NULL);
                        add_arg(&args, ARG_SGPR, ctx->ac.i32,
                                &ctx->es2gs_offset);
                } else {
                        add_arg(&args, ARG_SGPR, ctx->ac.i32, NULL);
                        declare_streamout_sgprs(ctx, stage, &args);
                        add_arg(&args, ARG_SGPR, ctx->ac.i32, &ctx->oc_lds);
                }
                declare_tes_input_vgprs(ctx, &args);
                break;
        case MESA_SHADER_GEOMETRY:
                if (has_previous_stage) {
                        // First 6 system regs
                        if (ctx->options->key.vs_common_out.as_ngg) {
                                add_arg(&args, ARG_SGPR, ctx->ac.i32,
                                        &ctx->gs_tg_info);
                        } else {
                                add_arg(&args, ARG_SGPR, ctx->ac.i32,
                                        &ctx->gs2vs_offset);
                        }

                        add_arg(&args, ARG_SGPR, ctx->ac.i32,
                                &ctx->merged_wave_info);
                        add_arg(&args, ARG_SGPR, ctx->ac.i32, &ctx->oc_lds);

                        add_arg(&args, ARG_SGPR, ctx->ac.i32, NULL); // scratch offset
                        add_arg(&args, ARG_SGPR, ctx->ac.i32, NULL); // unknown
                        add_arg(&args, ARG_SGPR, ctx->ac.i32, NULL); // unknown

                        declare_global_input_sgprs(ctx, &user_sgpr_info, &args,
                                                   &desc_sets);

                        if (previous_stage != MESA_SHADER_TESS_EVAL) {
                                declare_vs_specific_input_sgprs(ctx, stage,
                                                                has_previous_stage,
                                                                previous_stage,
                                                                &args);
                        }

                        if (needs_view_index)
                                add_arg(&args, ARG_SGPR, ctx->ac.i32,
                                        &ctx->abi.view_index);

                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->gs_vtx_offset[0]);
                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->gs_vtx_offset[2]);
                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->abi.gs_prim_id);
                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->abi.gs_invocation_id);
                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->gs_vtx_offset[4]);

                        if (previous_stage == MESA_SHADER_VERTEX) {
                                declare_vs_input_vgprs(ctx, &args);
                        } else {
                                declare_tes_input_vgprs(ctx, &args);
                        }
                } else {
                        declare_global_input_sgprs(ctx, &user_sgpr_info, &args,
                                                   &desc_sets);

                        if (needs_view_index)
                                add_arg(&args, ARG_SGPR, ctx->ac.i32,
                                        &ctx->abi.view_index);

                        add_arg(&args, ARG_SGPR, ctx->ac.i32, &ctx->gs2vs_offset);
                        add_arg(&args, ARG_SGPR, ctx->ac.i32, &ctx->gs_wave_id);
                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->gs_vtx_offset[0]);
                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->gs_vtx_offset[1]);
                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->abi.gs_prim_id);
                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->gs_vtx_offset[2]);
                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->gs_vtx_offset[3]);
                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->gs_vtx_offset[4]);
                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->gs_vtx_offset[5]);
                        add_arg(&args, ARG_VGPR, ctx->ac.i32,
                                &ctx->abi.gs_invocation_id);
                }
                break;
        case MESA_SHADER_FRAGMENT:
                declare_global_input_sgprs(ctx, &user_sgpr_info, &args,
                                           &desc_sets);

                add_arg(&args, ARG_SGPR, ctx->ac.i32, &ctx->abi.prim_mask);
                add_arg(&args, ARG_VGPR, ctx->ac.v2i32, &ctx->persp_sample);
                add_arg(&args, ARG_VGPR, ctx->ac.v2i32, &ctx->persp_center);
                add_arg(&args, ARG_VGPR, ctx->ac.v2i32, &ctx->persp_centroid);
                add_arg(&args, ARG_VGPR, ctx->ac.v3i32, NULL); /* persp pull model */
                add_arg(&args, ARG_VGPR, ctx->ac.v2i32, &ctx->linear_sample);
                add_arg(&args, ARG_VGPR, ctx->ac.v2i32, &ctx->linear_center);
                add_arg(&args, ARG_VGPR, ctx->ac.v2i32, &ctx->linear_centroid);
                add_arg(&args, ARG_VGPR, ctx->ac.f32, NULL);  /* line stipple tex */
                add_arg(&args, ARG_VGPR, ctx->ac.f32, &ctx->abi.frag_pos[0]);
                add_arg(&args, ARG_VGPR, ctx->ac.f32, &ctx->abi.frag_pos[1]);
                add_arg(&args, ARG_VGPR, ctx->ac.f32, &ctx->abi.frag_pos[2]);
                add_arg(&args, ARG_VGPR, ctx->ac.f32, &ctx->abi.frag_pos[3]);
                add_arg(&args, ARG_VGPR, ctx->ac.i32, &ctx->abi.front_face);
                add_arg(&args, ARG_VGPR, ctx->ac.i32, &ctx->abi.ancillary);
                add_arg(&args, ARG_VGPR, ctx->ac.i32, &ctx->abi.sample_coverage);
                add_arg(&args, ARG_VGPR, ctx->ac.i32, NULL);  /* fixed pt */
                break;
        default:
                unreachable("Shader stage not implemented");
        }

        ctx->main_function = create_llvm_function(
            ctx->context, ctx->ac.module, ctx->ac.builder, NULL, 0, &args,
            ctx->max_workgroup_size, ctx->options);
        set_llvm_calling_convention(ctx->main_function, stage);


        ctx->shader_info->num_input_vgprs = 0;
        ctx->shader_info->num_input_sgprs = ctx->options->supports_spill ? 2 : 0;

        ctx->shader_info->num_input_sgprs += args.num_sgprs_used;

        if (ctx->stage != MESA_SHADER_FRAGMENT)
                ctx->shader_info->num_input_vgprs = args.num_vgprs_used;

        assign_arguments(ctx->main_function, &args);

        user_sgpr_idx = 0;

        if (ctx->options->supports_spill || user_sgpr_info.need_ring_offsets) {
                set_loc_shader_ptr(ctx, AC_UD_SCRATCH_RING_OFFSETS,
                                   &user_sgpr_idx);
                if (ctx->options->supports_spill) {
                        ctx->ring_offsets = ac_build_intrinsic(&ctx->ac, "llvm.amdgcn.implicit.buffer.ptr",
                                                               LLVMPointerType(ctx->ac.i8, AC_ADDR_SPACE_CONST),
                                                               NULL, 0, AC_FUNC_ATTR_READNONE);
                        ctx->ring_offsets = LLVMBuildBitCast(ctx->ac.builder, ctx->ring_offsets,
                                                             ac_array_in_const_addr_space(ctx->ac.v4i32), "");
                }
        }

        /* For merged shaders the user SGPRs start at 8, with 8 system SGPRs in front (including
         * the rw_buffers at s0/s1. With user SGPR0 = s8, lets restart the count from 0 */
        if (has_previous_stage)
                user_sgpr_idx = 0;

        set_global_input_locs(ctx, &user_sgpr_info, desc_sets, &user_sgpr_idx);

        switch (stage) {
        case MESA_SHADER_COMPUTE:
                if (ctx->shader_info->info.cs.uses_grid_size) {
                        set_loc_shader(ctx, AC_UD_CS_GRID_SIZE,
                                       &user_sgpr_idx, 3);
                }
                break;
        case MESA_SHADER_VERTEX:
                set_vs_specific_input_locs(ctx, stage, has_previous_stage,
                                           previous_stage, &user_sgpr_idx);
                if (ctx->abi.view_index)
                        set_loc_shader(ctx, AC_UD_VIEW_INDEX, &user_sgpr_idx, 1);
                break;
        case MESA_SHADER_TESS_CTRL:
                set_vs_specific_input_locs(ctx, stage, has_previous_stage,
                                           previous_stage, &user_sgpr_idx);
                if (ctx->abi.view_index)
                        set_loc_shader(ctx, AC_UD_VIEW_INDEX, &user_sgpr_idx, 1);
                break;
        case MESA_SHADER_TESS_EVAL:
                if (ctx->abi.view_index)
                        set_loc_shader(ctx, AC_UD_VIEW_INDEX, &user_sgpr_idx, 1);
                break;
        case MESA_SHADER_GEOMETRY:
                if (has_previous_stage) {
                        if (previous_stage == MESA_SHADER_VERTEX)
                                set_vs_specific_input_locs(ctx, stage,
                                                           has_previous_stage,
                                                           previous_stage,
                                                           &user_sgpr_idx);
                }
                if (ctx->abi.view_index)
                        set_loc_shader(ctx, AC_UD_VIEW_INDEX, &user_sgpr_idx, 1);
                break;
        case MESA_SHADER_FRAGMENT:
                break;
        default:
                unreachable("Shader stage not implemented");
        }

        if (stage == MESA_SHADER_TESS_CTRL ||
            (stage == MESA_SHADER_VERTEX && ctx->options->key.vs_common_out.as_ls) ||
            /* GFX9 has the ESGS ring buffer in LDS. */
            (stage == MESA_SHADER_GEOMETRY && has_previous_stage)) {
                ac_declare_lds_as_pointer(&ctx->ac);
        }

        ctx->shader_info->num_user_sgprs = user_sgpr_idx;
}


static LLVMValueRef
radv_load_resource(struct ac_shader_abi *abi, LLVMValueRef index,
                   unsigned desc_set, unsigned binding)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);
        LLVMValueRef desc_ptr = ctx->descriptor_sets[desc_set];
        struct radv_pipeline_layout *pipeline_layout = ctx->options->layout;
        struct radv_descriptor_set_layout *layout = pipeline_layout->set[desc_set].layout;
        unsigned base_offset = layout->binding[binding].offset;
        LLVMValueRef offset, stride;

        if (layout->binding[binding].type == VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER_DYNAMIC ||
            layout->binding[binding].type == VK_DESCRIPTOR_TYPE_STORAGE_BUFFER_DYNAMIC) {
                unsigned idx = pipeline_layout->set[desc_set].dynamic_offset_start +
                        layout->binding[binding].dynamic_offset_offset;
                desc_ptr = ctx->abi.push_constants;
                base_offset = pipeline_layout->push_constant_size + 16 * idx;
                stride = LLVMConstInt(ctx->ac.i32, 16, false);
        } else
                stride = LLVMConstInt(ctx->ac.i32, layout->binding[binding].size, false);

        offset = LLVMConstInt(ctx->ac.i32, base_offset, false);

        if (layout->binding[binding].type != VK_DESCRIPTOR_TYPE_INLINE_UNIFORM_BLOCK_EXT) {
                offset = ac_build_imad(&ctx->ac, index, stride, offset);
        }

        desc_ptr = LLVMBuildGEP(ctx->ac.builder, desc_ptr, &offset, 1, "");
        desc_ptr = ac_cast_ptr(&ctx->ac, desc_ptr, ctx->ac.v4i32);
        LLVMSetMetadata(desc_ptr, ctx->ac.uniform_md_kind, ctx->ac.empty_md);

        if (layout->binding[binding].type == VK_DESCRIPTOR_TYPE_INLINE_UNIFORM_BLOCK_EXT) {
                uint32_t desc_type = S_008F0C_DST_SEL_X(V_008F0C_SQ_SEL_X) |
                        S_008F0C_DST_SEL_Y(V_008F0C_SQ_SEL_Y) |
                        S_008F0C_DST_SEL_Z(V_008F0C_SQ_SEL_Z) |
                        S_008F0C_DST_SEL_W(V_008F0C_SQ_SEL_W) |
                        S_008F0C_NUM_FORMAT(V_008F0C_BUF_NUM_FORMAT_FLOAT) |
                        S_008F0C_DATA_FORMAT(V_008F0C_BUF_DATA_FORMAT_32);

                LLVMValueRef desc_components[4] = {
                        LLVMBuildPtrToInt(ctx->ac.builder, desc_ptr, ctx->ac.intptr, ""),
                        LLVMConstInt(ctx->ac.i32, S_008F04_BASE_ADDRESS_HI(ctx->options->address32_hi), false),
                        /* High limit to support variable sizes. */
                        LLVMConstInt(ctx->ac.i32, 0xffffffff, false),
                        LLVMConstInt(ctx->ac.i32, desc_type, false),
                };

                return ac_build_gather_values(&ctx->ac, desc_components, 4);
        }

        return desc_ptr;
}


/* 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_non_vertex_index_offset(struct radv_shader_context *ctx)
{
        uint32_t num_patches = ctx->tcs_num_patches;
        uint32_t num_tcs_outputs;
        if (ctx->stage == MESA_SHADER_TESS_CTRL)
                num_tcs_outputs = util_last_bit64(ctx->shader_info->info.tcs.outputs_written);
        else
                num_tcs_outputs = ctx->options->key.tes.tcs_num_outputs;

        uint32_t output_vertex_size = num_tcs_outputs * 16;
        uint32_t pervertex_output_patch_size = ctx->tcs_vertices_per_patch * output_vertex_size;

        return LLVMConstInt(ctx->ac.i32, pervertex_output_patch_size * num_patches, false);
}

static LLVMValueRef calc_param_stride(struct radv_shader_context *ctx,
                                      LLVMValueRef vertex_index)
{
        LLVMValueRef param_stride;
        if (vertex_index)
                param_stride = LLVMConstInt(ctx->ac.i32, ctx->tcs_vertices_per_patch * ctx->tcs_num_patches, false);
        else
                param_stride = LLVMConstInt(ctx->ac.i32, ctx->tcs_num_patches, false);
        return param_stride;
}

static LLVMValueRef get_tcs_tes_buffer_address(struct radv_shader_context *ctx,
                                               LLVMValueRef vertex_index,
                                               LLVMValueRef param_index)
{
        LLVMValueRef base_addr;
        LLVMValueRef param_stride, constant16;
        LLVMValueRef rel_patch_id = get_rel_patch_id(ctx);
        LLVMValueRef vertices_per_patch = LLVMConstInt(ctx->ac.i32, ctx->tcs_vertices_per_patch, false);
        constant16 = LLVMConstInt(ctx->ac.i32, 16, false);
        param_stride = calc_param_stride(ctx, vertex_index);
        if (vertex_index) {
                base_addr = ac_build_imad(&ctx->ac, rel_patch_id,
                                          vertices_per_patch, vertex_index);
        } else {
                base_addr = rel_patch_id;
        }

        base_addr = LLVMBuildAdd(ctx->ac.builder, base_addr,
                                 LLVMBuildMul(ctx->ac.builder, param_index,
                                              param_stride, ""), "");

        base_addr = LLVMBuildMul(ctx->ac.builder, base_addr, constant16, "");

        if (!vertex_index) {
                LLVMValueRef patch_data_offset = get_non_vertex_index_offset(ctx);

                base_addr = LLVMBuildAdd(ctx->ac.builder, base_addr,
                                         patch_data_offset, "");
        }
        return base_addr;
}

static LLVMValueRef get_tcs_tes_buffer_address_params(struct radv_shader_context *ctx,
                                                      unsigned param,
                                                      unsigned const_index,
                                                      bool is_compact,
                                                      LLVMValueRef vertex_index,
                                                      LLVMValueRef indir_index)
{
        LLVMValueRef param_index;

        if (indir_index)
                param_index = LLVMBuildAdd(ctx->ac.builder, LLVMConstInt(ctx->ac.i32, param, false),
                                           indir_index, "");
        else {
                if (const_index && !is_compact)
                        param += const_index;
                param_index = LLVMConstInt(ctx->ac.i32, param, false);
        }
        return get_tcs_tes_buffer_address(ctx, vertex_index, param_index);
}

static LLVMValueRef
get_dw_address(struct radv_shader_context *ctx,
               LLVMValueRef dw_addr,
               unsigned param,
               unsigned const_index,
               bool compact_const_index,
               LLVMValueRef vertex_index,
               LLVMValueRef stride,
               LLVMValueRef indir_index)

{

        if (vertex_index) {
                dw_addr = LLVMBuildAdd(ctx->ac.builder, dw_addr,
                                       LLVMBuildMul(ctx->ac.builder,
                                                    vertex_index,
                                                    stride, ""), "");
        }

        if (indir_index)
                dw_addr = LLVMBuildAdd(ctx->ac.builder, dw_addr,
                                       LLVMBuildMul(ctx->ac.builder, indir_index,
                                                    LLVMConstInt(ctx->ac.i32, 4, false), ""), "");
        else if (const_index && !compact_const_index)
                dw_addr = LLVMBuildAdd(ctx->ac.builder, dw_addr,
                                       LLVMConstInt(ctx->ac.i32, const_index * 4, false), "");

        dw_addr = LLVMBuildAdd(ctx->ac.builder, dw_addr,
                               LLVMConstInt(ctx->ac.i32, param * 4, false), "");

        if (const_index && compact_const_index)
                dw_addr = LLVMBuildAdd(ctx->ac.builder, dw_addr,
                                       LLVMConstInt(ctx->ac.i32, const_index, false), "");
        return dw_addr;
}

static LLVMValueRef
load_tcs_varyings(struct ac_shader_abi *abi,
                  LLVMTypeRef type,
                  LLVMValueRef vertex_index,
                  LLVMValueRef indir_index,
                  unsigned const_index,
                  unsigned location,
                  unsigned driver_location,
                  unsigned component,
                  unsigned num_components,
                  bool is_patch,
                  bool is_compact,
                  bool load_input)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);
        LLVMValueRef dw_addr, stride;
        LLVMValueRef value[4], result;
        unsigned param = shader_io_get_unique_index(location);

        if (load_input) {
                uint32_t input_vertex_size = (ctx->tcs_num_inputs * 16) / 4;
                stride = LLVMConstInt(ctx->ac.i32, input_vertex_size, false);
                dw_addr = get_tcs_in_current_patch_offset(ctx);
        } else {
                if (!is_patch) {
                        stride = get_tcs_out_vertex_stride(ctx);
                        dw_addr = get_tcs_out_current_patch_offset(ctx);
                } else {
                        dw_addr = get_tcs_out_current_patch_data_offset(ctx);
                        stride = NULL;
                }
        }

        dw_addr = get_dw_address(ctx, dw_addr, param, const_index, is_compact, vertex_index, stride,
                                 indir_index);

        for (unsigned i = 0; i < num_components + component; i++) {
                value[i] = ac_lds_load(&ctx->ac, dw_addr);
                dw_addr = LLVMBuildAdd(ctx->ac.builder, dw_addr,
                                       ctx->ac.i32_1, "");
        }
        result = ac_build_varying_gather_values(&ctx->ac, value, num_components, component);
        return result;
}

static void
store_tcs_output(struct ac_shader_abi *abi,
                 const nir_variable *var,
                 LLVMValueRef vertex_index,
                 LLVMValueRef param_index,
                 unsigned const_index,
                 LLVMValueRef src,
                 unsigned writemask)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);
        const unsigned location = var->data.location;
        unsigned component = var->data.location_frac;
        const bool is_patch = var->data.patch;
        const bool is_compact = var->data.compact;
        LLVMValueRef dw_addr;
        LLVMValueRef stride = NULL;
        LLVMValueRef buf_addr = NULL;
        unsigned param;
        bool store_lds = true;

        if (is_patch) {
                if (!(ctx->tcs_patch_outputs_read & (1U << (location - VARYING_SLOT_PATCH0))))
                        store_lds = false;
        } else {
                if (!(ctx->tcs_outputs_read & (1ULL << location)))
                        store_lds = false;
        }

        param = shader_io_get_unique_index(location);
        if ((location == VARYING_SLOT_CLIP_DIST0 || location == VARYING_SLOT_CLIP_DIST1) && is_compact) {
                const_index += component;
                component = 0;

                if (const_index >= 4) {
                        const_index -= 4;
                        param++;
                }
        }

        if (!is_patch) {
                stride = get_tcs_out_vertex_stride(ctx);
                dw_addr = get_tcs_out_current_patch_offset(ctx);
        } else {
                dw_addr = get_tcs_out_current_patch_data_offset(ctx);
        }

        dw_addr = get_dw_address(ctx, dw_addr, param, const_index, is_compact, vertex_index, stride,
                                 param_index);
        buf_addr = get_tcs_tes_buffer_address_params(ctx, param, const_index, is_compact,
                                                     vertex_index, param_index);

        bool is_tess_factor = false;
        if (location == VARYING_SLOT_TESS_LEVEL_INNER ||
            location == VARYING_SLOT_TESS_LEVEL_OUTER)
                is_tess_factor = true;

        unsigned base = is_compact ? const_index : 0;
        for (unsigned chan = 0; chan < 8; chan++) {
                if (!(writemask & (1 << chan)))
                        continue;
                LLVMValueRef value = ac_llvm_extract_elem(&ctx->ac, src, chan - component);
                value = ac_to_integer(&ctx->ac, value);
                value = LLVMBuildZExtOrBitCast(ctx->ac.builder, value, ctx->ac.i32, "");

                if (store_lds || is_tess_factor) {
                        LLVMValueRef dw_addr_chan =
                                LLVMBuildAdd(ctx->ac.builder, dw_addr,
                                                           LLVMConstInt(ctx->ac.i32, chan, false), "");
                        ac_lds_store(&ctx->ac, dw_addr_chan, value);
                }

                if (!is_tess_factor && writemask != 0xF)
                        ac_build_buffer_store_dword(&ctx->ac, ctx->hs_ring_tess_offchip, value, 1,
                                                    buf_addr, ctx->oc_lds,
                                                    4 * (base + chan), ac_glc, false);
        }

        if (writemask == 0xF) {
                ac_build_buffer_store_dword(&ctx->ac, ctx->hs_ring_tess_offchip, src, 4,
                                            buf_addr, ctx->oc_lds,
                                            (base * 4), ac_glc, false);
        }
}

static LLVMValueRef
load_tes_input(struct ac_shader_abi *abi,
               LLVMTypeRef type,
               LLVMValueRef vertex_index,
               LLVMValueRef param_index,
               unsigned const_index,
               unsigned location,
               unsigned driver_location,
               unsigned component,
               unsigned num_components,
               bool is_patch,
               bool is_compact,
               bool load_input)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);
        LLVMValueRef buf_addr;
        LLVMValueRef result;
        unsigned param = shader_io_get_unique_index(location);

        if ((location == VARYING_SLOT_CLIP_DIST0 || location == VARYING_SLOT_CLIP_DIST1) && is_compact) {
                const_index += component;
                component = 0;
                if (const_index >= 4) {
                        const_index -= 4;
                        param++;
                }
        }

        buf_addr = get_tcs_tes_buffer_address_params(ctx, param, const_index,
                                                     is_compact, vertex_index, param_index);

        LLVMValueRef comp_offset = LLVMConstInt(ctx->ac.i32, component * 4, false);
        buf_addr = LLVMBuildAdd(ctx->ac.builder, buf_addr, comp_offset, "");

        result = ac_build_buffer_load(&ctx->ac, ctx->hs_ring_tess_offchip, num_components, NULL,
                                      buf_addr, ctx->oc_lds, is_compact ? (4 * const_index) : 0, ac_glc, true, false);
        result = ac_trim_vector(&ctx->ac, result, num_components);
        return result;
}

static LLVMValueRef
load_gs_input(struct ac_shader_abi *abi,
              unsigned location,
              unsigned driver_location,
              unsigned component,
              unsigned num_components,
              unsigned vertex_index,
              unsigned const_index,
              LLVMTypeRef type)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);
        LLVMValueRef vtx_offset;
        unsigned param, vtx_offset_param;
        LLVMValueRef value[4], result;

        vtx_offset_param = vertex_index;
        assert(vtx_offset_param < 6);
        vtx_offset = LLVMBuildMul(ctx->ac.builder, ctx->gs_vtx_offset[vtx_offset_param],
                                  LLVMConstInt(ctx->ac.i32, 4, false), "");

        param = shader_io_get_unique_index(location);

        for (unsigned i = component; i < num_components + component; i++) {
                if (ctx->ac.chip_class >= GFX9) {
                        LLVMValueRef dw_addr = ctx->gs_vtx_offset[vtx_offset_param];
                        dw_addr = LLVMBuildAdd(ctx->ac.builder, dw_addr,
                                               LLVMConstInt(ctx->ac.i32, param * 4 + i + const_index, 0), "");
                        value[i] = ac_lds_load(&ctx->ac, dw_addr);
                } else {
                        LLVMValueRef soffset =
                                LLVMConstInt(ctx->ac.i32,
                                             (param * 4 + i + const_index) * 256,
                                             false);

                        value[i] = ac_build_buffer_load(&ctx->ac,
                                                        ctx->esgs_ring, 1,
                                                        ctx->ac.i32_0,
                                                        vtx_offset, soffset,
                                                        0, ac_glc, true, false);
                }

                if (ac_get_type_size(type) == 2) {
                        value[i] = LLVMBuildBitCast(ctx->ac.builder, value[i], ctx->ac.i32, "");
                        value[i] = LLVMBuildTrunc(ctx->ac.builder, value[i], ctx->ac.i16, "");
                }
                value[i] = LLVMBuildBitCast(ctx->ac.builder, value[i], type, "");
        }
        result = ac_build_varying_gather_values(&ctx->ac, value, num_components, component);
        result = ac_to_integer(&ctx->ac, result);
        return result;
}


static void radv_emit_kill(struct ac_shader_abi *abi, LLVMValueRef visible)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);
        ac_build_kill_if_false(&ctx->ac, visible);
}

static LLVMValueRef lookup_interp_param(struct ac_shader_abi *abi,
                                        enum glsl_interp_mode interp, unsigned location)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);

        switch (interp) {
        case INTERP_MODE_FLAT:
        default:
                return NULL;
        case INTERP_MODE_SMOOTH:
        case INTERP_MODE_NONE:
                if (location == INTERP_CENTER)
                        return ctx->persp_center;
                else if (location == INTERP_CENTROID)
                        return ctx->persp_centroid;
                else if (location == INTERP_SAMPLE)
                        return ctx->persp_sample;
                break;
        case INTERP_MODE_NOPERSPECTIVE:
                if (location == INTERP_CENTER)
                        return ctx->linear_center;
                else if (location == INTERP_CENTROID)
                        return ctx->linear_centroid;
                else if (location == INTERP_SAMPLE)
                        return ctx->linear_sample;
                break;
        }
        return NULL;
}

static uint32_t
radv_get_sample_pos_offset(uint32_t num_samples)
{
        uint32_t sample_pos_offset = 0;

        switch (num_samples) {
        case 2:
                sample_pos_offset = 1;
                break;
        case 4:
                sample_pos_offset = 3;
                break;
        case 8:
                sample_pos_offset = 7;
                break;
        default:
                break;
        }
        return sample_pos_offset;
}

static LLVMValueRef load_sample_position(struct ac_shader_abi *abi,
                                         LLVMValueRef sample_id)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);

        LLVMValueRef result;
        LLVMValueRef index = LLVMConstInt(ctx->ac.i32, RING_PS_SAMPLE_POSITIONS, false);
        LLVMValueRef ptr = LLVMBuildGEP(ctx->ac.builder, ctx->ring_offsets, &index, 1, "");

        ptr = LLVMBuildBitCast(ctx->ac.builder, ptr,
                               ac_array_in_const_addr_space(ctx->ac.v2f32), "");

        uint32_t sample_pos_offset =
                radv_get_sample_pos_offset(ctx->options->key.fs.num_samples);

        sample_id =
                LLVMBuildAdd(ctx->ac.builder, sample_id,
                             LLVMConstInt(ctx->ac.i32, sample_pos_offset, false), "");
        result = ac_build_load_invariant(&ctx->ac, ptr, sample_id);

        return result;
}


static LLVMValueRef load_sample_mask_in(struct ac_shader_abi *abi)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);
        uint8_t log2_ps_iter_samples;

        if (ctx->shader_info->info.ps.force_persample) {
                log2_ps_iter_samples =
                        util_logbase2(ctx->options->key.fs.num_samples);
        } else {
                log2_ps_iter_samples = ctx->options->key.fs.log2_ps_iter_samples;
        }

        /* The bit pattern matches that used by fixed function fragment
         * processing. */
        static const uint16_t ps_iter_masks[] = {
                0xffff, /* not used */
                0x5555,
                0x1111,
                0x0101,
                0x0001,
        };
        assert(log2_ps_iter_samples < ARRAY_SIZE(ps_iter_masks));

        uint32_t ps_iter_mask = ps_iter_masks[log2_ps_iter_samples];

        LLVMValueRef result, sample_id;
        sample_id = ac_unpack_param(&ctx->ac, abi->ancillary, 8, 4);
        sample_id = LLVMBuildShl(ctx->ac.builder, LLVMConstInt(ctx->ac.i32, ps_iter_mask, false), sample_id, "");
        result = LLVMBuildAnd(ctx->ac.builder, sample_id, abi->sample_coverage, "");
        return result;
}


static void gfx10_ngg_gs_emit_vertex(struct radv_shader_context *ctx,
                                     unsigned stream,
                                     LLVMValueRef *addrs);

static void
visit_emit_vertex(struct ac_shader_abi *abi, unsigned stream, LLVMValueRef *addrs)
{
        LLVMValueRef gs_next_vertex;
        LLVMValueRef can_emit;
        unsigned offset = 0;
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);

        if (ctx->options->key.vs_common_out.as_ngg) {
                gfx10_ngg_gs_emit_vertex(ctx, stream, addrs);
                return;
        }

        /* Write vertex attribute values to GSVS ring */
        gs_next_vertex = LLVMBuildLoad(ctx->ac.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(ctx->ac.builder, LLVMIntULT, gs_next_vertex,
                                 LLVMConstInt(ctx->ac.i32, ctx->gs_max_out_vertices, false), "");
        ac_build_kill_if_false(&ctx->ac, can_emit);

        for (unsigned i = 0; i < AC_LLVM_MAX_OUTPUTS; ++i) {
                unsigned output_usage_mask =
                        ctx->shader_info->info.gs.output_usage_mask[i];
                uint8_t output_stream =
                        ctx->shader_info->info.gs.output_streams[i];
                LLVMValueRef *out_ptr = &addrs[i * 4];
                int length = util_last_bit(output_usage_mask);

                if (!(ctx->output_mask & (1ull << i)) ||
                    output_stream != stream)
                        continue;

                for (unsigned j = 0; j < length; j++) {
                        if (!(output_usage_mask & (1 << j)))
                                continue;

                        LLVMValueRef out_val = LLVMBuildLoad(ctx->ac.builder,
                                                             out_ptr[j], "");
                        LLVMValueRef voffset =
                                LLVMConstInt(ctx->ac.i32, offset *
                                             ctx->gs_max_out_vertices, false);

                        offset++;

                        voffset = LLVMBuildAdd(ctx->ac.builder, voffset, gs_next_vertex, "");
                        voffset = LLVMBuildMul(ctx->ac.builder, voffset, LLVMConstInt(ctx->ac.i32, 4, false), "");

                        out_val = ac_to_integer(&ctx->ac, out_val);
                        out_val = LLVMBuildZExtOrBitCast(ctx->ac.builder, out_val, ctx->ac.i32, "");

                        ac_build_buffer_store_dword(&ctx->ac,
                                                    ctx->gsvs_ring[stream],
                                                    out_val, 1,
                                                    voffset, ctx->gs2vs_offset, 0,
                                                    ac_glc | ac_slc, true);
                }
        }

        gs_next_vertex = LLVMBuildAdd(ctx->ac.builder, gs_next_vertex,
                                      ctx->ac.i32_1, "");
        LLVMBuildStore(ctx->ac.builder, gs_next_vertex, ctx->gs_next_vertex[stream]);

        ac_build_sendmsg(&ctx->ac,
                         AC_SENDMSG_GS_OP_EMIT | AC_SENDMSG_GS | (stream << 8),
                         ctx->gs_wave_id);
}

static void
visit_end_primitive(struct ac_shader_abi *abi, unsigned stream)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);

        if (ctx->options->key.vs_common_out.as_ngg) {
                LLVMBuildStore(ctx->ac.builder, ctx->ac.i32_0, ctx->gs_curprim_verts[stream]);
                return;
        }

        ac_build_sendmsg(&ctx->ac, AC_SENDMSG_GS_OP_CUT | AC_SENDMSG_GS | (stream << 8), ctx->gs_wave_id);
}

static LLVMValueRef
load_tess_coord(struct ac_shader_abi *abi)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);

        LLVMValueRef coord[4] = {
                ctx->tes_u,
                ctx->tes_v,
                ctx->ac.f32_0,
                ctx->ac.f32_0,
        };

        if (ctx->tes_primitive_mode == GL_TRIANGLES)
                coord[2] = LLVMBuildFSub(ctx->ac.builder, ctx->ac.f32_1,
                                        LLVMBuildFAdd(ctx->ac.builder, coord[0], coord[1], ""), "");

        return ac_build_gather_values(&ctx->ac, coord, 3);
}

static LLVMValueRef
load_patch_vertices_in(struct ac_shader_abi *abi)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);
        return LLVMConstInt(ctx->ac.i32, ctx->options->key.tcs.input_vertices, false);
}


static LLVMValueRef radv_load_base_vertex(struct ac_shader_abi *abi)
{
        return abi->base_vertex;
}

static LLVMValueRef radv_load_ssbo(struct ac_shader_abi *abi,
                                   LLVMValueRef buffer_ptr, bool write)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);
        LLVMValueRef result;

        LLVMSetMetadata(buffer_ptr, ctx->ac.uniform_md_kind, ctx->ac.empty_md);

        result = LLVMBuildLoad(ctx->ac.builder, buffer_ptr, "");
        LLVMSetMetadata(result, ctx->ac.invariant_load_md_kind, ctx->ac.empty_md);

        return result;
}

static LLVMValueRef radv_load_ubo(struct ac_shader_abi *abi, LLVMValueRef buffer_ptr)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);
        LLVMValueRef result;

        if (LLVMGetTypeKind(LLVMTypeOf(buffer_ptr)) != LLVMPointerTypeKind) {
                /* Do not load the descriptor for inlined uniform blocks. */
                return buffer_ptr;
        }

        LLVMSetMetadata(buffer_ptr, ctx->ac.uniform_md_kind, ctx->ac.empty_md);

        result = LLVMBuildLoad(ctx->ac.builder, buffer_ptr, "");
        LLVMSetMetadata(result, ctx->ac.invariant_load_md_kind, ctx->ac.empty_md);

        return result;
}

static LLVMValueRef radv_get_sampler_desc(struct ac_shader_abi *abi,
                                          unsigned descriptor_set,
                                          unsigned base_index,
                                          unsigned constant_index,
                                          LLVMValueRef index,
                                          enum ac_descriptor_type desc_type,
                                          bool image, bool write,
                                          bool bindless)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);
        LLVMValueRef list = ctx->descriptor_sets[descriptor_set];
        struct radv_descriptor_set_layout *layout = ctx->options->layout->set[descriptor_set].layout;
        struct radv_descriptor_set_binding_layout *binding = layout->binding + base_index;
        unsigned offset = binding->offset;
        unsigned stride = binding->size;
        unsigned type_size;
        LLVMBuilderRef builder = ctx->ac.builder;
        LLVMTypeRef type;

        assert(base_index < layout->binding_count);

        switch (desc_type) {
        case AC_DESC_IMAGE:
                type = ctx->ac.v8i32;
                type_size = 32;
                break;
        case AC_DESC_FMASK:
                type = ctx->ac.v8i32;
                offset += 32;
                type_size = 32;
                break;
        case AC_DESC_SAMPLER:
                type = ctx->ac.v4i32;
                if (binding->type == VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER) {
                        offset += radv_combined_image_descriptor_sampler_offset(binding);
                }

                type_size = 16;
                break;
        case AC_DESC_BUFFER:
                type = ctx->ac.v4i32;
                type_size = 16;
                break;
        case AC_DESC_PLANE_0:
        case AC_DESC_PLANE_1:
        case AC_DESC_PLANE_2:
                type = ctx->ac.v8i32;
                type_size = 32;
                offset += 32 * (desc_type - AC_DESC_PLANE_0);
                break;
        default:
                unreachable("invalid desc_type\n");
        }

        offset += constant_index * stride;

        if (desc_type == AC_DESC_SAMPLER && binding->immutable_samplers_offset &&
            (!index || binding->immutable_samplers_equal)) {
                if (binding->immutable_samplers_equal)
                        constant_index = 0;

                const uint32_t *samplers = radv_immutable_samplers(layout, binding);

                LLVMValueRef constants[] = {
                        LLVMConstInt(ctx->ac.i32, samplers[constant_index * 4 + 0], 0),
                        LLVMConstInt(ctx->ac.i32, samplers[constant_index * 4 + 1], 0),
                        LLVMConstInt(ctx->ac.i32, samplers[constant_index * 4 + 2], 0),
                        LLVMConstInt(ctx->ac.i32, samplers[constant_index * 4 + 3], 0),
                };
                return ac_build_gather_values(&ctx->ac, constants, 4);
        }

        assert(stride % type_size == 0);

        LLVMValueRef adjusted_index = index;
        if (!adjusted_index)
                adjusted_index = ctx->ac.i32_0;

        adjusted_index = LLVMBuildMul(builder, adjusted_index, LLVMConstInt(ctx->ac.i32, stride / type_size, 0), "");

        LLVMValueRef val_offset = LLVMConstInt(ctx->ac.i32, offset, 0);
        list = LLVMBuildGEP(builder, list, &val_offset, 1, "");
        list = LLVMBuildPointerCast(builder, list,
                                    ac_array_in_const32_addr_space(type), "");

        LLVMValueRef descriptor = ac_build_load_to_sgpr(&ctx->ac, list, adjusted_index);

        /* 3 plane formats always have same size and format for plane 1 & 2, so
         * use the tail from plane 1 so that we can store only the first 16 bytes
         * of the last plane. */
        if (desc_type == AC_DESC_PLANE_2) {
                LLVMValueRef descriptor2 = radv_get_sampler_desc(abi, descriptor_set, base_index, constant_index, index, AC_DESC_PLANE_1,image, write, bindless);

                LLVMValueRef components[8];
                for (unsigned i = 0; i < 4; ++i)
                        components[i] = ac_llvm_extract_elem(&ctx->ac, descriptor, i);

                for (unsigned i = 4; i < 8; ++i)
                        components[i] = ac_llvm_extract_elem(&ctx->ac, descriptor2, i);
                descriptor = ac_build_gather_values(&ctx->ac, components, 8);
        }

        return descriptor;
}

/* For 2_10_10_10 formats the alpha is handled as unsigned by pre-vega HW.
 * so we may need to fix it up. */
static LLVMValueRef
adjust_vertex_fetch_alpha(struct radv_shader_context *ctx,
                          unsigned adjustment,
                          LLVMValueRef alpha)
{
        if (adjustment == RADV_ALPHA_ADJUST_NONE)
                return alpha;

        LLVMValueRef c30 = LLVMConstInt(ctx->ac.i32, 30, 0);

        alpha = LLVMBuildBitCast(ctx->ac.builder, alpha, ctx->ac.f32, "");

        if (adjustment == RADV_ALPHA_ADJUST_SSCALED)
                alpha = LLVMBuildFPToUI(ctx->ac.builder, alpha, ctx->ac.i32, "");
        else
                alpha = ac_to_integer(&ctx->ac, alpha);

        /* For the integer-like cases, do a natural sign extension.
         *
         * For the SNORM case, the values are 0.0, 0.333, 0.666, 1.0
         * and happen to contain 0, 1, 2, 3 as the two LSBs of the
         * exponent.
         */
        alpha = LLVMBuildShl(ctx->ac.builder, alpha,
                             adjustment == RADV_ALPHA_ADJUST_SNORM ?
                             LLVMConstInt(ctx->ac.i32, 7, 0) : c30, "");
        alpha = LLVMBuildAShr(ctx->ac.builder, alpha, c30, "");

        /* Convert back to the right type. */
        if (adjustment == RADV_ALPHA_ADJUST_SNORM) {
                LLVMValueRef clamp;
                LLVMValueRef neg_one = LLVMConstReal(ctx->ac.f32, -1.0);
                alpha = LLVMBuildSIToFP(ctx->ac.builder, alpha, ctx->ac.f32, "");
                clamp = LLVMBuildFCmp(ctx->ac.builder, LLVMRealULT, alpha, neg_one, "");
                alpha = LLVMBuildSelect(ctx->ac.builder, clamp, neg_one, alpha, "");
        } else if (adjustment == RADV_ALPHA_ADJUST_SSCALED) {
                alpha = LLVMBuildSIToFP(ctx->ac.builder, alpha, ctx->ac.f32, "");
        }

        return LLVMBuildBitCast(ctx->ac.builder, alpha, ctx->ac.i32, "");
}

static unsigned
get_num_channels_from_data_format(unsigned data_format)
{
        switch (data_format) {
        case V_008F0C_BUF_DATA_FORMAT_8:
        case V_008F0C_BUF_DATA_FORMAT_16:
        case V_008F0C_BUF_DATA_FORMAT_32:
                return 1;
        case V_008F0C_BUF_DATA_FORMAT_8_8:
        case V_008F0C_BUF_DATA_FORMAT_16_16:
        case V_008F0C_BUF_DATA_FORMAT_32_32:
                return 2;
        case V_008F0C_BUF_DATA_FORMAT_10_11_11:
        case V_008F0C_BUF_DATA_FORMAT_11_11_10:
        case V_008F0C_BUF_DATA_FORMAT_32_32_32:
                return 3;
        case V_008F0C_BUF_DATA_FORMAT_8_8_8_8:
        case V_008F0C_BUF_DATA_FORMAT_10_10_10_2:
        case V_008F0C_BUF_DATA_FORMAT_2_10_10_10:
        case V_008F0C_BUF_DATA_FORMAT_16_16_16_16:
        case V_008F0C_BUF_DATA_FORMAT_32_32_32_32:
                return 4;
        default:
                break;
        }

        return 4;
}

static LLVMValueRef
radv_fixup_vertex_input_fetches(struct radv_shader_context *ctx,
                                LLVMValueRef value,
                                unsigned num_channels,
                                bool is_float)
{
        LLVMValueRef zero = is_float ? ctx->ac.f32_0 : ctx->ac.i32_0;
        LLVMValueRef one = is_float ? ctx->ac.f32_1 : ctx->ac.i32_1;
        LLVMValueRef chan[4];

        if (LLVMGetTypeKind(LLVMTypeOf(value)) == LLVMVectorTypeKind) {
                unsigned vec_size = LLVMGetVectorSize(LLVMTypeOf(value));

                if (num_channels == 4 && num_channels == vec_size)
                        return value;

                num_channels = MIN2(num_channels, vec_size);

                for (unsigned i = 0; i < num_channels; i++)
                        chan[i] = ac_llvm_extract_elem(&ctx->ac, value, i);
        } else {
                if (num_channels) {
                        assert(num_channels == 1);
                        chan[0] = value;
                }
        }

        for (unsigned i = num_channels; i < 4; i++) {
                chan[i] = i == 3 ? one : zero;
                chan[i] = ac_to_integer(&ctx->ac, chan[i]);
        }

        return ac_build_gather_values(&ctx->ac, chan, 4);
}

static void
handle_vs_input_decl(struct radv_shader_context *ctx,
                     struct nir_variable *variable)
{
        LLVMValueRef t_list_ptr = ctx->vertex_buffers;
        LLVMValueRef t_offset;
        LLVMValueRef t_list;
        LLVMValueRef input;
        LLVMValueRef buffer_index;
        unsigned attrib_count = glsl_count_attribute_slots(variable->type, true);
        uint8_t input_usage_mask =
                ctx->shader_info->info.vs.input_usage_mask[variable->data.location];
        unsigned num_input_channels = util_last_bit(input_usage_mask);

        variable->data.driver_location = variable->data.location * 4;

        enum glsl_base_type type = glsl_get_base_type(variable->type);
        for (unsigned i = 0; i < attrib_count; ++i) {
                LLVMValueRef output[4];
                unsigned attrib_index = variable->data.location + i - VERT_ATTRIB_GENERIC0;
                unsigned attrib_format = ctx->options->key.vs.vertex_attribute_formats[attrib_index];
                unsigned data_format = attrib_format & 0x0f;
                unsigned num_format = (attrib_format >> 4) & 0x07;
                bool is_float = num_format != V_008F0C_BUF_NUM_FORMAT_UINT &&
                                num_format != V_008F0C_BUF_NUM_FORMAT_SINT;

                if (ctx->options->key.vs.instance_rate_inputs & (1u << attrib_index)) {
                        uint32_t divisor = ctx->options->key.vs.instance_rate_divisors[attrib_index];

                        if (divisor) {
                                buffer_index = ctx->abi.instance_id;

                                if (divisor != 1) {
                                        buffer_index = LLVMBuildUDiv(ctx->ac.builder, buffer_index,
                                                                     LLVMConstInt(ctx->ac.i32, divisor, 0), "");
                                }
                        } else {
                                buffer_index = ctx->ac.i32_0;
                        }

                        buffer_index = LLVMBuildAdd(ctx->ac.builder, ctx->abi.start_instance, buffer_index, "");
                } else
                        buffer_index = LLVMBuildAdd(ctx->ac.builder, ctx->abi.vertex_id,
                                                    ctx->abi.base_vertex, "");

                /* Adjust the number of channels to load based on the vertex
                 * attribute format.
                 */
                unsigned num_format_channels = get_num_channels_from_data_format(data_format);
                unsigned num_channels = MIN2(num_input_channels, num_format_channels);
                unsigned attrib_binding = ctx->options->key.vs.vertex_attribute_bindings[attrib_index];
                unsigned attrib_offset = ctx->options->key.vs.vertex_attribute_offsets[attrib_index];
                unsigned attrib_stride = ctx->options->key.vs.vertex_attribute_strides[attrib_index];

                if (ctx->options->key.vs.post_shuffle & (1 << attrib_index)) {
                        /* Always load, at least, 3 channels for formats that
                         * need to be shuffled because X<->Z.
                         */
                        num_channels = MAX2(num_channels, 3);
                }

                if (attrib_stride != 0 && attrib_offset > attrib_stride) {
                        LLVMValueRef buffer_offset =
                                LLVMConstInt(ctx->ac.i32,
                                             attrib_offset / attrib_stride, false);

                        buffer_index = LLVMBuildAdd(ctx->ac.builder,
                                                    buffer_index,
                                                    buffer_offset, "");

                        attrib_offset = attrib_offset % attrib_stride;
                }

                t_offset = LLVMConstInt(ctx->ac.i32, attrib_binding, false);
                t_list = ac_build_load_to_sgpr(&ctx->ac, t_list_ptr, t_offset);

                input = ac_build_struct_tbuffer_load(&ctx->ac, t_list,
                                                     buffer_index,
                                                     LLVMConstInt(ctx->ac.i32, attrib_offset, false),
                                                     ctx->ac.i32_0, ctx->ac.i32_0,
                                                     num_channels,
                                                     data_format, num_format, 0, true);

                if (ctx->options->key.vs.post_shuffle & (1 << attrib_index)) {
                        LLVMValueRef c[4];
                        c[0] = ac_llvm_extract_elem(&ctx->ac, input, 2);
                        c[1] = ac_llvm_extract_elem(&ctx->ac, input, 1);
                        c[2] = ac_llvm_extract_elem(&ctx->ac, input, 0);
                        c[3] = ac_llvm_extract_elem(&ctx->ac, input, 3);

                        input = ac_build_gather_values(&ctx->ac, c, 4);
                }

                input = radv_fixup_vertex_input_fetches(ctx, input, num_channels,
                                                        is_float);

                for (unsigned chan = 0; chan < 4; chan++) {
                        LLVMValueRef llvm_chan = LLVMConstInt(ctx->ac.i32, chan, false);
                        output[chan] = LLVMBuildExtractElement(ctx->ac.builder, input, llvm_chan, "");
                        if (type == GLSL_TYPE_FLOAT16) {
                                output[chan] = LLVMBuildBitCast(ctx->ac.builder, output[chan], ctx->ac.f32, "");
                                output[chan] = LLVMBuildFPTrunc(ctx->ac.builder, output[chan], ctx->ac.f16, "");
                        }
                }

                unsigned alpha_adjust = (ctx->options->key.vs.alpha_adjust >> (attrib_index * 2)) & 3;
                output[3] = adjust_vertex_fetch_alpha(ctx, alpha_adjust, output[3]);

                for (unsigned chan = 0; chan < 4; chan++) {
                        output[chan] = ac_to_integer(&ctx->ac, output[chan]);
                        if (type == GLSL_TYPE_UINT16 || type == GLSL_TYPE_INT16)
                                output[chan] = LLVMBuildTrunc(ctx->ac.builder, output[chan], ctx->ac.i16, "");

                        ctx->inputs[ac_llvm_reg_index_soa(variable->data.location + i, chan)] = output[chan];
                }
        }
}

static void
handle_vs_inputs(struct radv_shader_context *ctx,
                 struct nir_shader *nir) {
        nir_foreach_variable(variable, &nir->inputs)
                handle_vs_input_decl(ctx, variable);
}

static void
prepare_interp_optimize(struct radv_shader_context *ctx,
                        struct nir_shader *nir)
{
        bool uses_center = false;
        bool uses_centroid = false;
        nir_foreach_variable(variable, &nir->inputs) {
                if (glsl_get_base_type(glsl_without_array(variable->type)) != GLSL_TYPE_FLOAT ||
                    variable->data.sample)
                        continue;

                if (variable->data.centroid)
                        uses_centroid = true;
                else
                        uses_center = true;
        }

        if (uses_center && uses_centroid) {
                LLVMValueRef sel = LLVMBuildICmp(ctx->ac.builder, LLVMIntSLT, ctx->abi.prim_mask, ctx->ac.i32_0, "");
                ctx->persp_centroid = LLVMBuildSelect(ctx->ac.builder, sel, ctx->persp_center, ctx->persp_centroid, "");
                ctx->linear_centroid = LLVMBuildSelect(ctx->ac.builder, sel, ctx->linear_center, ctx->linear_centroid, "");
        }
}

static void
scan_shader_output_decl(struct radv_shader_context *ctx,
                        struct nir_variable *variable,
                        struct nir_shader *shader,
                        gl_shader_stage stage)
{
        int idx = variable->data.location + variable->data.index;
        unsigned attrib_count = glsl_count_attribute_slots(variable->type, false);
        uint64_t mask_attribs;

        variable->data.driver_location = idx * 4;

        /* tess ctrl has it's own load/store paths for outputs */
        if (stage == MESA_SHADER_TESS_CTRL)
                return;

        if (variable->data.compact) {
                unsigned component_count = variable->data.location_frac +
                                           glsl_get_length(variable->type);
                attrib_count = (component_count + 3) / 4;
        }

        mask_attribs = ((1ull << attrib_count) - 1) << idx;
        if (stage == MESA_SHADER_VERTEX ||
            stage == MESA_SHADER_TESS_EVAL ||
            stage == MESA_SHADER_GEOMETRY) {
                if (idx == VARYING_SLOT_CLIP_DIST0) {
                        if (stage == MESA_SHADER_VERTEX) {
                                ctx->shader_info->vs.outinfo.clip_dist_mask = (1 << shader->info.clip_distance_array_size) - 1;
                                ctx->shader_info->vs.outinfo.cull_dist_mask = (1 << shader->info.cull_distance_array_size) - 1;
                                ctx->shader_info->vs.outinfo.cull_dist_mask <<= shader->info.clip_distance_array_size;
                        }
                        if (stage == MESA_SHADER_TESS_EVAL) {
                                ctx->shader_info->tes.outinfo.clip_dist_mask = (1 << shader->info.clip_distance_array_size) - 1;
                                ctx->shader_info->tes.outinfo.cull_dist_mask = (1 << shader->info.cull_distance_array_size) - 1;
                                ctx->shader_info->tes.outinfo.cull_dist_mask <<= shader->info.clip_distance_array_size;
                        }
                }
        }

        ctx->output_mask |= mask_attribs;
}


/* Initialize arguments for the shader export intrinsic */
static void
si_llvm_init_export_args(struct radv_shader_context *ctx,
                         LLVMValueRef *values,
                         unsigned enabled_channels,
                         unsigned target,
                         struct ac_export_args *args)
{
        /* Specify the channels that are enabled. */
        args->enabled_channels = enabled_channels;

        /* Specify whether the EXEC mask represents the valid mask */
        args->valid_mask = 0;

        /* Specify whether this is the last export */
        args->done = 0;

        /* Specify the target we are exporting */
        args->target = target;

        args->compr = false;
        args->out[0] = LLVMGetUndef(ctx->ac.f32);
        args->out[1] = LLVMGetUndef(ctx->ac.f32);
        args->out[2] = LLVMGetUndef(ctx->ac.f32);
        args->out[3] = LLVMGetUndef(ctx->ac.f32);

        if (!values)
                return;

        bool is_16bit = ac_get_type_size(LLVMTypeOf(values[0])) == 2;
        if (ctx->stage == MESA_SHADER_FRAGMENT) {
                unsigned index = target - V_008DFC_SQ_EXP_MRT;
                unsigned col_format = (ctx->options->key.fs.col_format >> (4 * index)) & 0xf;
                bool is_int8 = (ctx->options->key.fs.is_int8 >> index) & 1;
                bool is_int10 = (ctx->options->key.fs.is_int10 >> index) & 1;
                unsigned chan;

                LLVMValueRef (*packf)(struct ac_llvm_context *ctx, LLVMValueRef args[2]) = NULL;
                LLVMValueRef (*packi)(struct ac_llvm_context *ctx, LLVMValueRef args[2],
                                      unsigned bits, bool hi) = NULL;

                switch(col_format) {
                case V_028714_SPI_SHADER_ZERO:
                        args->enabled_channels = 0; /* writemask */
                        args->target = V_008DFC_SQ_EXP_NULL;
                        break;

                case V_028714_SPI_SHADER_32_R:
                        args->enabled_channels = 1;
                        args->out[0] = values[0];
                        break;

                case V_028714_SPI_SHADER_32_GR:
                        args->enabled_channels = 0x3;
                        args->out[0] = values[0];
                        args->out[1] = values[1];
                        break;

                case V_028714_SPI_SHADER_32_AR:
                        if (ctx->ac.chip_class >= GFX10) {
                                args->enabled_channels = 0x3;
                                args->out[0] = values[0];
                                args->out[1] = values[3];
                        } else {
                                args->enabled_channels = 0x9;
                                args->out[0] = values[0];
                                args->out[3] = values[3];
                        }
                        break;

                case V_028714_SPI_SHADER_FP16_ABGR:
                        args->enabled_channels = 0x5;
                        packf = ac_build_cvt_pkrtz_f16;
                        if (is_16bit) {
                                for (unsigned chan = 0; chan < 4; chan++)
                                        values[chan] = LLVMBuildFPExt(ctx->ac.builder,
                                                                      values[chan],
                                                                      ctx->ac.f32, "");
                        }
                        break;

                case V_028714_SPI_SHADER_UNORM16_ABGR:
                        args->enabled_channels = 0x5;
                        packf = ac_build_cvt_pknorm_u16;
                        break;

                case V_028714_SPI_SHADER_SNORM16_ABGR:
                        args->enabled_channels = 0x5;
                        packf = ac_build_cvt_pknorm_i16;
                        break;

                case V_028714_SPI_SHADER_UINT16_ABGR:
                        args->enabled_channels = 0x5;
                        packi = ac_build_cvt_pk_u16;
                        if (is_16bit) {
                                for (unsigned chan = 0; chan < 4; chan++)
                                        values[chan] = LLVMBuildZExt(ctx->ac.builder,
                                                                      ac_to_integer(&ctx->ac, values[chan]),
                                                                      ctx->ac.i32, "");
                        }
                        break;

                case V_028714_SPI_SHADER_SINT16_ABGR:
                        args->enabled_channels = 0x5;
                        packi = ac_build_cvt_pk_i16;
                        if (is_16bit) {
                                for (unsigned chan = 0; chan < 4; chan++)
                                        values[chan] = LLVMBuildSExt(ctx->ac.builder,
                                                                      ac_to_integer(&ctx->ac, values[chan]),
                                                                      ctx->ac.i32, "");
                        }
                        break;

                default:
                case V_028714_SPI_SHADER_32_ABGR:
                        memcpy(&args->out[0], values, sizeof(values[0]) * 4);
                        break;
                }

                /* Pack f16 or norm_i16/u16. */
                if (packf) {
                        for (chan = 0; chan < 2; chan++) {
                                LLVMValueRef pack_args[2] = {
                                        values[2 * chan],
                                        values[2 * chan + 1]
                                };
                                LLVMValueRef packed;

                                packed = packf(&ctx->ac, pack_args);
                                args->out[chan] = ac_to_float(&ctx->ac, packed);
                        }
                        args->compr = 1; /* COMPR flag */
                }

                /* Pack i16/u16. */
                if (packi) {
                        for (chan = 0; chan < 2; chan++) {
                                LLVMValueRef pack_args[2] = {
                                        ac_to_integer(&ctx->ac, values[2 * chan]),
                                        ac_to_integer(&ctx->ac, values[2 * chan + 1])
                                };
                                LLVMValueRef packed;

                                packed = packi(&ctx->ac, pack_args,
                                               is_int8 ? 8 : is_int10 ? 10 : 16,
                                               chan == 1);
                                args->out[chan] = ac_to_float(&ctx->ac, packed);
                        }
                        args->compr = 1; /* COMPR flag */
                }
                return;
        }

        if (is_16bit) {
                for (unsigned chan = 0; chan < 4; chan++) {
                        values[chan] = LLVMBuildBitCast(ctx->ac.builder, values[chan], ctx->ac.i16, "");
                        args->out[chan] = LLVMBuildZExt(ctx->ac.builder, values[chan], ctx->ac.i32, "");
                }
        } else
                memcpy(&args->out[0], values, sizeof(values[0]) * 4);

        for (unsigned i = 0; i < 4; ++i)
                args->out[i] = ac_to_float(&ctx->ac, args->out[i]);
}

static void
radv_export_param(struct radv_shader_context *ctx, unsigned index,
                  LLVMValueRef *values, unsigned enabled_channels)
{
        struct ac_export_args args;

        si_llvm_init_export_args(ctx, values, enabled_channels,
                                 V_008DFC_SQ_EXP_PARAM + index, &args);
        ac_build_export(&ctx->ac, &args);
}

static LLVMValueRef
radv_load_output(struct radv_shader_context *ctx, unsigned index, unsigned chan)
{
        LLVMValueRef output;

        if (ctx->vertexptr) {
                LLVMValueRef gep_idx[3] = {
                        ctx->ac.i32_0, /* implicit C-style array */
                        ctx->ac.i32_0, /* second value of struct */
                        ctx->ac.i32_1, /* stream 1: source data index */
                };

                gep_idx[2] = LLVMConstInt(ctx->ac.i32, ac_llvm_reg_index_soa(index, chan), false);
                output = LLVMBuildGEP(ctx->ac.builder, ctx->vertexptr, gep_idx, 3, "");
        } else {
                output = ctx->abi.outputs[ac_llvm_reg_index_soa(index, chan)];
        }

        return LLVMBuildLoad(ctx->ac.builder, output, "");
}

static void
radv_emit_stream_output(struct radv_shader_context *ctx,
                         LLVMValueRef const *so_buffers,
                         LLVMValueRef const *so_write_offsets,
                         const struct radv_stream_output *output)
{
        unsigned num_comps = util_bitcount(output->component_mask);
        unsigned loc = output->location;
        unsigned buf = output->buffer;
        unsigned offset = output->offset;
        unsigned start;
        LLVMValueRef out[4];

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

        /* Get the first component. */
        start = ffs(output->component_mask) - 1;

        /* Load the output as int. */
        for (int i = 0; i < num_comps; i++) {
                out[i] = ac_to_integer(&ctx->ac,
                                       radv_load_output(ctx, loc, start + i));
        }

        /* 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) */
                out[3] = LLVMGetUndef(ctx->ac.i32);
                /* fall through */
        case 4: /* as v4i32 */
                vdata = ac_build_gather_values(&ctx->ac, out,
                                               !ac_has_vec3_support(ctx->ac.chip_class, false) ?
                                               util_next_power_of_two(num_comps) :
                                               num_comps);
                break;
        }

        ac_build_buffer_store_dword(&ctx->ac, so_buffers[buf],
                                    vdata, num_comps, so_write_offsets[buf],
                                    ctx->ac.i32_0, offset,
                                    ac_glc | ac_slc, false);
}

static void
radv_emit_streamout(struct radv_shader_context *ctx, unsigned stream)
{
        struct ac_build_if_state if_ctx;
        int i;

        /* Get bits [22:16], i.e. (so_param >> 16) & 127; */
        assert(ctx->streamout_config);
        LLVMValueRef so_vtx_count =
                ac_build_bfe(&ctx->ac, ctx->streamout_config,
                             LLVMConstInt(ctx->ac.i32, 16, false),
                             LLVMConstInt(ctx->ac.i32, 7, false), false);

        LLVMValueRef tid = ac_get_thread_id(&ctx->ac);

        /* can_emit = tid < so_vtx_count; */
        LLVMValueRef can_emit = LLVMBuildICmp(ctx->ac.builder, LLVMIntULT,
                                              tid, so_vtx_count, "");

        /* 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.
         */
        ac_nir_build_if(&if_ctx, ctx, 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 = ctx->streamout_write_idx;

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

                /* Load the descriptor and compute the write offset for each
                 * enabled buffer.
                 */
                LLVMValueRef so_write_offset[4] = {};
                LLVMValueRef so_buffers[4] = {};
                LLVMValueRef buf_ptr = ctx->streamout_buffers;

                for (i = 0; i < 4; i++) {
                        uint16_t stride = ctx->shader_info->info.so.strides[i];

                        if (!stride)
                                continue;

                        LLVMValueRef offset =
                                LLVMConstInt(ctx->ac.i32, i, false);

                        so_buffers[i] = ac_build_load_to_sgpr(&ctx->ac,
                                                              buf_ptr, offset);

                        LLVMValueRef so_offset = ctx->streamout_offset[i];

                        so_offset = LLVMBuildMul(ctx->ac.builder, so_offset,
                                                 LLVMConstInt(ctx->ac.i32, 4, false), "");

                        so_write_offset[i] =
                                ac_build_imad(&ctx->ac, so_write_index,
                                              LLVMConstInt(ctx->ac.i32,
                                                           stride * 4, false),
                                              so_offset);
                }

                /* Write streamout data. */
                for (i = 0; i < ctx->shader_info->info.so.num_outputs; i++) {
                        struct radv_stream_output *output =
                                &ctx->shader_info->info.so.outputs[i];

                        if (stream != output->stream)
                                continue;

                        radv_emit_stream_output(ctx, so_buffers,
                                                so_write_offset, output);
                }
        }
        ac_nir_build_endif(&if_ctx);
}

struct radv_shader_output_values {
        LLVMValueRef values[4];
        unsigned slot_name;
        unsigned slot_index;
        unsigned usage_mask;
};

static void
radv_build_param_exports(struct radv_shader_context *ctx,
                         struct radv_shader_output_values *outputs,
                         unsigned noutput,
                         struct radv_vs_output_info *outinfo,
                         bool export_clip_dists)
{
        unsigned param_count = 0;

        for (unsigned i = 0; i < noutput; i++) {
                unsigned slot_name = outputs[i].slot_name;
                unsigned usage_mask = outputs[i].usage_mask;

                if (slot_name != VARYING_SLOT_LAYER &&
                    slot_name != VARYING_SLOT_PRIMITIVE_ID &&
                    slot_name != VARYING_SLOT_CLIP_DIST0 &&
                    slot_name != VARYING_SLOT_CLIP_DIST1 &&
                    slot_name < VARYING_SLOT_VAR0)
                        continue;

                if ((slot_name == VARYING_SLOT_CLIP_DIST0 ||
                     slot_name == VARYING_SLOT_CLIP_DIST1) && !export_clip_dists)
                        continue;

                radv_export_param(ctx, param_count, outputs[i].values, usage_mask);

                assert(i < ARRAY_SIZE(outinfo->vs_output_param_offset));
                outinfo->vs_output_param_offset[slot_name] = param_count++;
        }

        outinfo->param_exports = param_count;
}

/* Generate export instructions for hardware VS shader stage or NGG GS stage
 * (position and parameter data only).
 */
static void
radv_llvm_export_vs(struct radv_shader_context *ctx,
                    struct radv_shader_output_values *outputs,
                    unsigned noutput,
                    struct radv_vs_output_info *outinfo,
                    bool export_clip_dists)
{
        LLVMValueRef psize_value = NULL, layer_value = NULL, viewport_value = NULL;
        struct ac_export_args pos_args[4] = {};
        unsigned pos_idx, index;
        int i;

        /* Build position exports */
        for (i = 0; i < noutput; i++) {
                switch (outputs[i].slot_name) {
                case VARYING_SLOT_POS:
                        si_llvm_init_export_args(ctx, outputs[i].values, 0xf,
                                                 V_008DFC_SQ_EXP_POS, &pos_args[0]);
                        break;
                case VARYING_SLOT_PSIZ:
                        psize_value = outputs[i].values[0];
                        break;
                case VARYING_SLOT_LAYER:
                        layer_value = outputs[i].values[0];
                        break;
                case VARYING_SLOT_VIEWPORT:
                        viewport_value = outputs[i].values[0];
                        break;
                case VARYING_SLOT_CLIP_DIST0:
                case VARYING_SLOT_CLIP_DIST1:
                        index = 2 + outputs[i].slot_index;
                        si_llvm_init_export_args(ctx, outputs[i].values, 0xf,
                                                 V_008DFC_SQ_EXP_POS + index,
                                                 &pos_args[index]);
                        break;
                default:
                        break;
                }
        }

        /* We need to add the position output manually if it's missing. */
        if (!pos_args[0].out[0]) {
                pos_args[0].enabled_channels = 0xf; /* writemask */
                pos_args[0].valid_mask = 0; /* EXEC mask */
                pos_args[0].done = 0; /* last export? */
                pos_args[0].target = V_008DFC_SQ_EXP_POS;
                pos_args[0].compr = 0; /* COMPR flag */
                pos_args[0].out[0] = ctx->ac.f32_0; /* X */
                pos_args[0].out[1] = ctx->ac.f32_0; /* Y */
                pos_args[0].out[2] = ctx->ac.f32_0; /* Z */
                pos_args[0].out[3] = ctx->ac.f32_1;  /* W */
        }

        if (outinfo->writes_pointsize ||
            outinfo->writes_layer ||
            outinfo->writes_viewport_index) {
                pos_args[1].enabled_channels = ((outinfo->writes_pointsize == true ? 1 : 0) |
                                                (outinfo->writes_layer == true ? 4 : 0));
                pos_args[1].valid_mask = 0;
                pos_args[1].done = 0;
                pos_args[1].target = V_008DFC_SQ_EXP_POS + 1;
                pos_args[1].compr = 0;
                pos_args[1].out[0] = ctx->ac.f32_0; /* X */
                pos_args[1].out[1] = ctx->ac.f32_0; /* Y */
                pos_args[1].out[2] = ctx->ac.f32_0; /* Z */
                pos_args[1].out[3] = ctx->ac.f32_0;  /* W */

                if (outinfo->writes_pointsize == true)
                        pos_args[1].out[0] = psize_value;
                if (outinfo->writes_layer == true)
                        pos_args[1].out[2] = layer_value;
                if (outinfo->writes_viewport_index == true) {
                        if (ctx->options->chip_class >= GFX9) {
                                /* GFX9 has the layer in out.z[10:0] and the viewport
                                 * index in out.z[19:16].
                                 */
                                LLVMValueRef v = viewport_value;
                                v = ac_to_integer(&ctx->ac, v);
                                v = LLVMBuildShl(ctx->ac.builder, v,
                                                 LLVMConstInt(ctx->ac.i32, 16, false),
                                                 "");
                                v = LLVMBuildOr(ctx->ac.builder, v,
                                                ac_to_integer(&ctx->ac, pos_args[1].out[2]), "");

                                pos_args[1].out[2] = ac_to_float(&ctx->ac, v);
                                pos_args[1].enabled_channels |= 1 << 2;
                        } else {
                                pos_args[1].out[3] = viewport_value;
                                pos_args[1].enabled_channels |= 1 << 3;
                        }
                }
        }

        for (i = 0; i < 4; i++) {
                if (pos_args[i].out[0])
                        outinfo->pos_exports++;
        }

        /* Navi10-14 skip POS0 exports if EXEC=0 and DONE=0, causing a hang.
         * Setting valid_mask=1 prevents it and has no other effect.
         */
        if (ctx->ac.family == CHIP_NAVI10 ||
            ctx->ac.family == CHIP_NAVI12 ||
            ctx->ac.family == CHIP_NAVI14)
                pos_args[0].valid_mask = 1;

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

                /* Specify the target we are exporting */
                pos_args[i].target = V_008DFC_SQ_EXP_POS + pos_idx++;

                if (pos_idx == outinfo->pos_exports)
                        /* Specify that this is the last export */
                        pos_args[i].done = 1;

                ac_build_export(&ctx->ac, &pos_args[i]);
        }

        /* Build parameter exports */
        radv_build_param_exports(ctx, outputs, noutput, outinfo, export_clip_dists);
}

static void
handle_vs_outputs_post(struct radv_shader_context *ctx,
                       bool export_prim_id,
                       bool export_clip_dists,
                       struct radv_vs_output_info *outinfo)
{
        struct radv_shader_output_values *outputs;
        unsigned noutput = 0;

        if (ctx->options->key.has_multiview_view_index) {
                LLVMValueRef* tmp_out = &ctx->abi.outputs[ac_llvm_reg_index_soa(VARYING_SLOT_LAYER, 0)];
                if(!*tmp_out) {
                        for(unsigned i = 0; i < 4; ++i)
                                ctx->abi.outputs[ac_llvm_reg_index_soa(VARYING_SLOT_LAYER, i)] =
                                            ac_build_alloca_undef(&ctx->ac, ctx->ac.f32, "");
                }

                LLVMBuildStore(ctx->ac.builder, ac_to_float(&ctx->ac, ctx->abi.view_index),  *tmp_out);
                ctx->output_mask |= 1ull << VARYING_SLOT_LAYER;
        }

        memset(outinfo->vs_output_param_offset, AC_EXP_PARAM_UNDEFINED,
               sizeof(outinfo->vs_output_param_offset));
        outinfo->pos_exports = 0;

        if (ctx->output_mask & (1ull << VARYING_SLOT_PSIZ)) {
                outinfo->writes_pointsize = true;
        }

        if (ctx->output_mask & (1ull << VARYING_SLOT_LAYER)) {
                outinfo->writes_layer = true;
        }

        if (ctx->output_mask & (1ull << VARYING_SLOT_VIEWPORT)) {
                outinfo->writes_viewport_index = true;
        }

        if (ctx->shader_info->info.so.num_outputs &&
            !ctx->is_gs_copy_shader) {
                /* The GS copy shader emission already emits streamout. */
                radv_emit_streamout(ctx, 0);
        }

        /* Allocate a temporary array for the output values. */
        unsigned num_outputs = util_bitcount64(ctx->output_mask) + export_prim_id;
        outputs = malloc(num_outputs * sizeof(outputs[0]));

        for (unsigned i = 0; i < AC_LLVM_MAX_OUTPUTS; ++i) {
                if (!(ctx->output_mask & (1ull << i)))
                        continue;

                outputs[noutput].slot_name = i;
                outputs[noutput].slot_index = i == VARYING_SLOT_CLIP_DIST1;

                if (ctx->stage == MESA_SHADER_VERTEX &&
                    !ctx->is_gs_copy_shader) {
                        outputs[noutput].usage_mask =
                                ctx->shader_info->info.vs.output_usage_mask[i];
                } else if (ctx->stage == MESA_SHADER_TESS_EVAL) {
                        outputs[noutput].usage_mask =
                                ctx->shader_info->info.tes.output_usage_mask[i];
                } else {
                        assert(ctx->is_gs_copy_shader || ctx->options->key.vs_common_out.as_ngg);
                        outputs[noutput].usage_mask =
                                ctx->shader_info->info.gs.output_usage_mask[i];
                }

                for (unsigned j = 0; j < 4; j++) {
                        outputs[noutput].values[j] =
                                ac_to_float(&ctx->ac, radv_load_output(ctx, i, j));
                }

                noutput++;
        }

        /* Export PrimitiveID. */
        if (export_prim_id) {
                outinfo->export_prim_id = true;

                outputs[noutput].slot_name = VARYING_SLOT_PRIMITIVE_ID;
                outputs[noutput].slot_index = 0;
                outputs[noutput].usage_mask = 0x1;
                outputs[noutput].values[0] = ctx->vs_prim_id;
                for (unsigned j = 1; j < 4; j++)
                        outputs[noutput].values[j] = ctx->ac.f32_0;
                noutput++;
        }

        radv_llvm_export_vs(ctx, outputs, noutput, outinfo, export_clip_dists);

        free(outputs);
}

static void
handle_es_outputs_post(struct radv_shader_context *ctx,
                       struct radv_es_output_info *outinfo)
{
        int j;
        uint64_t max_output_written = 0;
        LLVMValueRef lds_base = NULL;

        for (unsigned i = 0; i < AC_LLVM_MAX_OUTPUTS; ++i) {
                int param_index;

                if (!(ctx->output_mask & (1ull << i)))
                        continue;

                param_index = shader_io_get_unique_index(i);

                max_output_written = MAX2(param_index, max_output_written);
        }

        outinfo->esgs_itemsize = (max_output_written + 1) * 16;

        if (ctx->ac.chip_class  >= GFX9) {
                unsigned itemsize_dw = outinfo->esgs_itemsize / 4;
                LLVMValueRef vertex_idx = ac_get_thread_id(&ctx->ac);
                LLVMValueRef wave_idx = ac_unpack_param(&ctx->ac, ctx->merged_wave_info, 24, 4);
                vertex_idx = LLVMBuildOr(ctx->ac.builder, vertex_idx,
                                         LLVMBuildMul(ctx->ac.builder, wave_idx,
                                                      LLVMConstInt(ctx->ac.i32, 64, false), ""), "");
                lds_base = LLVMBuildMul(ctx->ac.builder, vertex_idx,
                                        LLVMConstInt(ctx->ac.i32, itemsize_dw, 0), "");
        }

        for (unsigned i = 0; i < AC_LLVM_MAX_OUTPUTS; ++i) {
                LLVMValueRef dw_addr = NULL;
                LLVMValueRef *out_ptr = &ctx->abi.outputs[i * 4];
                unsigned output_usage_mask;
                int param_index;

                if (!(ctx->output_mask & (1ull << i)))
                        continue;

                if (ctx->stage == MESA_SHADER_VERTEX) {
                        output_usage_mask =
                                ctx->shader_info->info.vs.output_usage_mask[i];
                } else {
                        assert(ctx->stage == MESA_SHADER_TESS_EVAL);
                        output_usage_mask =
                                ctx->shader_info->info.tes.output_usage_mask[i];
                }

                param_index = shader_io_get_unique_index(i);

                if (lds_base) {
                        dw_addr = LLVMBuildAdd(ctx->ac.builder, lds_base,
                                               LLVMConstInt(ctx->ac.i32, param_index * 4, false),
                                               "");
                }

                for (j = 0; j < 4; j++) {
                        if (!(output_usage_mask & (1 << j)))
                                continue;

                        LLVMValueRef out_val = LLVMBuildLoad(ctx->ac.builder, out_ptr[j], "");
                        out_val = ac_to_integer(&ctx->ac, out_val);
                        out_val = LLVMBuildZExtOrBitCast(ctx->ac.builder, out_val, ctx->ac.i32, "");

                        if (ctx->ac.chip_class  >= GFX9) {
                                LLVMValueRef dw_addr_offset =
                                        LLVMBuildAdd(ctx->ac.builder, dw_addr,
                                                     LLVMConstInt(ctx->ac.i32,
                                                                  j, false), "");

                                ac_lds_store(&ctx->ac, dw_addr_offset, out_val);
                        } else {
                                ac_build_buffer_store_dword(&ctx->ac,
                                                            ctx->esgs_ring,
                                                            out_val, 1,
                                                            NULL, ctx->es2gs_offset,
                                                            (4 * param_index + j) * 4,
                                                            ac_glc | ac_slc, true);
                        }
                }
        }
}

static void
handle_ls_outputs_post(struct radv_shader_context *ctx)
{
        LLVMValueRef vertex_id = ctx->rel_auto_id;
        uint32_t num_tcs_inputs = util_last_bit64(ctx->shader_info->info.vs.ls_outputs_written);
        LLVMValueRef vertex_dw_stride = LLVMConstInt(ctx->ac.i32, num_tcs_inputs * 4, false);
        LLVMValueRef base_dw_addr = LLVMBuildMul(ctx->ac.builder, vertex_id,
                                                 vertex_dw_stride, "");

        for (unsigned i = 0; i < AC_LLVM_MAX_OUTPUTS; ++i) {
                LLVMValueRef *out_ptr = &ctx->abi.outputs[i * 4];

                if (!(ctx->output_mask & (1ull << i)))
                        continue;

                int param = shader_io_get_unique_index(i);
                LLVMValueRef dw_addr = LLVMBuildAdd(ctx->ac.builder, base_dw_addr,
                                                    LLVMConstInt(ctx->ac.i32, param * 4, false),
                                                    "");
                for (unsigned j = 0; j < 4; j++) {
                        LLVMValueRef value = LLVMBuildLoad(ctx->ac.builder, out_ptr[j], "");
                        value = ac_to_integer(&ctx->ac, value);
                        value = LLVMBuildZExtOrBitCast(ctx->ac.builder, value, ctx->ac.i32, "");
                        ac_lds_store(&ctx->ac, dw_addr, value);
                        dw_addr = LLVMBuildAdd(ctx->ac.builder, dw_addr, ctx->ac.i32_1, "");
                }
        }
}

static LLVMValueRef get_wave_id_in_tg(struct radv_shader_context *ctx)
{
        return ac_unpack_param(&ctx->ac, ctx->merged_wave_info, 24, 4);
}

static LLVMValueRef get_tgsize(struct radv_shader_context *ctx)
{
        return ac_unpack_param(&ctx->ac, ctx->merged_wave_info, 28, 4);
}

static LLVMValueRef get_thread_id_in_tg(struct radv_shader_context *ctx)
{
        LLVMBuilderRef builder = ctx->ac.builder;
        LLVMValueRef tmp;
        tmp = LLVMBuildMul(builder, get_wave_id_in_tg(ctx),
                           LLVMConstInt(ctx->ac.i32, 64, false), "");
        return LLVMBuildAdd(builder, tmp, ac_get_thread_id(&ctx->ac), "");
}

static LLVMValueRef ngg_get_vtx_cnt(struct radv_shader_context *ctx)
{
        return ac_build_bfe(&ctx->ac, ctx->gs_tg_info,
                            LLVMConstInt(ctx->ac.i32, 12, false),
                            LLVMConstInt(ctx->ac.i32, 9, false),
                            false);
}

static LLVMValueRef ngg_get_prim_cnt(struct radv_shader_context *ctx)
{
        return ac_build_bfe(&ctx->ac, ctx->gs_tg_info,
                            LLVMConstInt(ctx->ac.i32, 22, false),
                            LLVMConstInt(ctx->ac.i32, 9, false),
                            false);
}

static LLVMValueRef
ngg_gs_get_vertex_storage(struct radv_shader_context *ctx)
{
        unsigned num_outputs = util_bitcount64(ctx->output_mask);

        LLVMTypeRef elements[2] = {
                LLVMArrayType(ctx->ac.i32, 4 * num_outputs),
                LLVMArrayType(ctx->ac.i8, 4),
        };
        LLVMTypeRef type = LLVMStructTypeInContext(ctx->ac.context, elements, 2, false);
        type = LLVMPointerType(LLVMArrayType(type, 0), AC_ADDR_SPACE_LDS);
        return LLVMBuildBitCast(ctx->ac.builder, ctx->gs_ngg_emit, type, "");
}

/**
 * Return a pointer to the LDS storage reserved for the N'th vertex, where N
 * is in emit order; that is:
 * - during the epilogue, N is the threadidx (relative to the entire threadgroup)
 * - during vertex emit, i.e. while the API GS shader invocation is running,
 *   N = threadidx * gs_max_out_vertices + emitidx
 *
 * Goals of the LDS memory layout:
 * 1. Eliminate bank conflicts on write for geometry shaders that have all emits
 *    in uniform control flow
 * 2. Eliminate bank conflicts on read for export if, additionally, there is no
 *    culling
 * 3. Agnostic to the number of waves (since we don't know it before compiling)
 * 4. Allow coalescing of LDS instructions (ds_write_b128 etc.)
 * 5. Avoid wasting memory.
 *
 * We use an AoS layout due to point 4 (this also helps point 3). In an AoS
 * layout, elimination of bank conflicts requires that each vertex occupy an
 * odd number of dwords. We use the additional dword to store the output stream
 * index as well as a flag to indicate whether this vertex ends a primitive
 * for rasterization.
 *
 * Swizzling is required to satisfy points 1 and 2 simultaneously.
 *
 * Vertices are stored in export order (gsthread * gs_max_out_vertices + emitidx).
 * Indices are swizzled in groups of 32, which ensures point 1 without
 * disturbing point 2.
 *
 * \return an LDS pointer to type {[N x i32], [4 x i8]}
 */
static LLVMValueRef
ngg_gs_vertex_ptr(struct radv_shader_context *ctx, LLVMValueRef vertexidx)
{
        LLVMBuilderRef builder = ctx->ac.builder;
        LLVMValueRef storage = ngg_gs_get_vertex_storage(ctx);

        /* gs_max_out_vertices = 2^(write_stride_2exp) * some odd number */
        unsigned write_stride_2exp = ffs(ctx->gs_max_out_vertices) - 1;
        if (write_stride_2exp) {
                LLVMValueRef row =
                        LLVMBuildLShr(builder, vertexidx,
                                      LLVMConstInt(ctx->ac.i32, 5, false), "");
                LLVMValueRef swizzle =
                        LLVMBuildAnd(builder, row,
                                     LLVMConstInt(ctx->ac.i32, (1u << write_stride_2exp) - 1,
                                                  false), "");
                vertexidx = LLVMBuildXor(builder, vertexidx, swizzle, "");
        }

        return ac_build_gep0(&ctx->ac, storage, vertexidx);
}

static LLVMValueRef
ngg_gs_emit_vertex_ptr(struct radv_shader_context *ctx, LLVMValueRef gsthread,
                       LLVMValueRef emitidx)
{
        LLVMBuilderRef builder = ctx->ac.builder;
        LLVMValueRef tmp;

        tmp = LLVMConstInt(ctx->ac.i32, ctx->gs_max_out_vertices, false);
        tmp = LLVMBuildMul(builder, tmp, gsthread, "");
        const LLVMValueRef vertexidx = LLVMBuildAdd(builder, tmp, emitidx, "");
        return ngg_gs_vertex_ptr(ctx, vertexidx);
}

/* Send GS Alloc Req message from the first wave of the group to SPI.
 * Message payload is:
 * - bits 0..10: vertices in group
 * - bits 12..22: primitives in group
 */
static void build_sendmsg_gs_alloc_req(struct radv_shader_context *ctx,
                                       LLVMValueRef vtx_cnt,
                                       LLVMValueRef prim_cnt)
{
        LLVMBuilderRef builder = ctx->ac.builder;
        LLVMValueRef tmp;

        tmp = LLVMBuildICmp(builder, LLVMIntEQ, get_wave_id_in_tg(ctx), ctx->ac.i32_0, "");
        ac_build_ifcc(&ctx->ac, tmp, 5020);

        tmp = LLVMBuildShl(builder, prim_cnt, LLVMConstInt(ctx->ac.i32, 12, false),"");
        tmp = LLVMBuildOr(builder, tmp, vtx_cnt, "");
        ac_build_sendmsg(&ctx->ac, AC_SENDMSG_GS_ALLOC_REQ, tmp);

        ac_build_endif(&ctx->ac, 5020);
}

struct ngg_prim {
        unsigned num_vertices;
        LLVMValueRef isnull;
        LLVMValueRef index[3];
        LLVMValueRef edgeflag[3];
};

static void build_export_prim(struct radv_shader_context *ctx,
                              const struct ngg_prim *prim)
{
        LLVMBuilderRef builder = ctx->ac.builder;
        struct ac_export_args args;
        LLVMValueRef tmp;

        tmp = LLVMBuildZExt(builder, prim->isnull, ctx->ac.i32, "");
        args.out[0] = LLVMBuildShl(builder, tmp, LLVMConstInt(ctx->ac.i32, 31, false), "");

        for (unsigned i = 0; i < prim->num_vertices; ++i) {
                tmp = LLVMBuildShl(builder, prim->index[i],
                                   LLVMConstInt(ctx->ac.i32, 10 * i, false), "");
                args.out[0] = LLVMBuildOr(builder, args.out[0], tmp, "");
                tmp = LLVMBuildZExt(builder, prim->edgeflag[i], ctx->ac.i32, "");
                tmp = LLVMBuildShl(builder, tmp,
                                   LLVMConstInt(ctx->ac.i32, 10 * i + 9, false), "");
                args.out[0] = LLVMBuildOr(builder, args.out[0], tmp, "");
        }

        args.out[0] = LLVMBuildBitCast(builder, args.out[0], ctx->ac.f32, "");
        args.out[1] = LLVMGetUndef(ctx->ac.f32);
        args.out[2] = LLVMGetUndef(ctx->ac.f32);
        args.out[3] = LLVMGetUndef(ctx->ac.f32);

        args.target = V_008DFC_SQ_EXP_PRIM;
        args.enabled_channels = 1;
        args.done = true;
        args.valid_mask = false;
        args.compr = false;

        ac_build_export(&ctx->ac, &args);
}

static void
handle_ngg_outputs_post(struct radv_shader_context *ctx)
{
        LLVMBuilderRef builder = ctx->ac.builder;
        struct ac_build_if_state if_state;
        unsigned num_vertices = 3;
        LLVMValueRef tmp;

        assert((ctx->stage == MESA_SHADER_VERTEX ||
                ctx->stage == MESA_SHADER_TESS_EVAL) && !ctx->is_gs_copy_shader);

        LLVMValueRef prims_in_wave = ac_unpack_param(&ctx->ac, ctx->merged_wave_info, 8, 8);
        LLVMValueRef vtx_in_wave = ac_unpack_param(&ctx->ac, ctx->merged_wave_info, 0, 8);
        LLVMValueRef is_gs_thread = LLVMBuildICmp(builder, LLVMIntULT,
                                                  ac_get_thread_id(&ctx->ac), prims_in_wave, "");
        LLVMValueRef is_es_thread = LLVMBuildICmp(builder, LLVMIntULT,
                                                  ac_get_thread_id(&ctx->ac), vtx_in_wave, "");
        LLVMValueRef vtxindex[] = {
                ac_unpack_param(&ctx->ac, ctx->gs_vtx_offset[0], 0, 16),
                ac_unpack_param(&ctx->ac, ctx->gs_vtx_offset[0], 16, 16),
                ac_unpack_param(&ctx->ac, ctx->gs_vtx_offset[2], 0, 16),
        };

        /* TODO: streamout */

        /* TODO: VS primitive ID */
        if (ctx->options->key.vs_common_out.export_prim_id)
                assert(0);

        /* TODO: primitive culling */

        build_sendmsg_gs_alloc_req(ctx, ngg_get_vtx_cnt(ctx), ngg_get_prim_cnt(ctx));

        /* TODO: streamout queries */
        /* Export primitive data to the index buffer. Format is:
         *  - bits 0..8: index 0
         *  - bit 9: edge flag 0
         *  - bits 10..18: index 1
         *  - bit 19: edge flag 1
         *  - bits 20..28: index 2
         *  - bit 29: edge flag 2
         *  - bit 31: null primitive (skip)
         *
         * For the first version, we will always build up all three indices
         * independent of the primitive type. The additional garbage data
         * shouldn't hurt.
         *
         * TODO: culling depends on the primitive type, so can have some
         * interaction here.
         */
        ac_nir_build_if(&if_state, ctx, is_gs_thread);
        {
                struct ngg_prim prim = {};

                prim.num_vertices = num_vertices;
                prim.isnull = ctx->ac.i1false;
                memcpy(prim.index, vtxindex, sizeof(vtxindex[0]) * 3);

                for (unsigned i = 0; i < num_vertices; ++i) {
                        tmp = LLVMBuildLShr(builder, ctx->abi.gs_invocation_id,
                                            LLVMConstInt(ctx->ac.i32, 8 + i, false), "");
                        prim.edgeflag[i] = LLVMBuildTrunc(builder, tmp, ctx->ac.i1, "");
                }

                build_export_prim(ctx, &prim);
        }
        ac_nir_build_endif(&if_state);

        /* Export per-vertex data (positions and parameters). */
        ac_nir_build_if(&if_state, ctx, is_es_thread);
        {
                handle_vs_outputs_post(ctx, ctx->options->key.vs_common_out.export_prim_id,
                                       ctx->options->key.vs_common_out.export_clip_dists,
                                       ctx->stage == MESA_SHADER_TESS_EVAL ? &ctx->shader_info->tes.outinfo : &ctx->shader_info->vs.outinfo);
        }
        ac_nir_build_endif(&if_state);
}

static void gfx10_ngg_gs_emit_prologue(struct radv_shader_context *ctx)
{
        /* Zero out the part of LDS scratch that is used to accumulate the
         * per-stream generated primitive count.
         */
        LLVMBuilderRef builder = ctx->ac.builder;
        LLVMValueRef scratchptr = ctx->gs_ngg_scratch;
        LLVMValueRef tid = get_thread_id_in_tg(ctx);
        LLVMValueRef tmp;

        tmp = LLVMBuildICmp(builder, LLVMIntULT, tid, LLVMConstInt(ctx->ac.i32, 4, false), "");
        ac_build_ifcc(&ctx->ac, tmp, 5090);
        {
                LLVMValueRef ptr = ac_build_gep0(&ctx->ac, scratchptr, tid);
                LLVMBuildStore(builder, ctx->ac.i32_0, ptr);
        }
        ac_build_endif(&ctx->ac, 5090);

        ac_build_s_barrier(&ctx->ac);
}

static void gfx10_ngg_gs_emit_epilogue_1(struct radv_shader_context *ctx)
{
        LLVMBuilderRef builder = ctx->ac.builder;
        LLVMValueRef i8_0 = LLVMConstInt(ctx->ac.i8, 0, false);
        LLVMValueRef tmp;

        /* Zero out remaining (non-emitted) primitive flags.
         *
         * Note: Alternatively, we could pass the relevant gs_next_vertex to
         *       the emit threads via LDS. This is likely worse in the expected
         *       typical case where each GS thread emits the full set of
         *       vertices.
         */
        for (unsigned stream = 0; stream < 4; ++stream) {
                unsigned num_components;

                num_components =
                        ctx->shader_info->info.gs.num_stream_output_components[stream];
                if (!num_components)
                        continue;

                const LLVMValueRef gsthread = get_thread_id_in_tg(ctx);

                ac_build_bgnloop(&ctx->ac, 5100);

                const LLVMValueRef vertexidx =
                        LLVMBuildLoad(builder, ctx->gs_next_vertex[stream], "");
                tmp = LLVMBuildICmp(builder, LLVMIntUGE, vertexidx,
                        LLVMConstInt(ctx->ac.i32, ctx->gs_max_out_vertices, false), "");
                ac_build_ifcc(&ctx->ac, tmp, 5101);
                ac_build_break(&ctx->ac);
                ac_build_endif(&ctx->ac, 5101);

                tmp = LLVMBuildAdd(builder, vertexidx, ctx->ac.i32_1, "");
                LLVMBuildStore(builder, tmp, ctx->gs_next_vertex[stream]);

                tmp = ngg_gs_emit_vertex_ptr(ctx, gsthread, vertexidx);
                LLVMValueRef gep_idx[3] = {
                        ctx->ac.i32_0, /* implied C-style array */
                        ctx->ac.i32_1, /* second entry of struct */
                        LLVMConstInt(ctx->ac.i32, stream, false),
                };
                tmp = LLVMBuildGEP(builder, tmp, gep_idx, 3, "");
                LLVMBuildStore(builder, i8_0, tmp);

                ac_build_endloop(&ctx->ac, 5100);
        }
}

static void gfx10_ngg_gs_emit_epilogue_2(struct radv_shader_context *ctx)
{
        const unsigned verts_per_prim = si_conv_gl_prim_to_vertices(ctx->gs_output_prim);
        LLVMBuilderRef builder = ctx->ac.builder;
        LLVMValueRef tmp, tmp2;

        ac_build_s_barrier(&ctx->ac);

        const LLVMValueRef tid = get_thread_id_in_tg(ctx);
        LLVMValueRef num_emit_threads = ngg_get_prim_cnt(ctx);

        /* TODO: streamout */

        /* TODO: culling */

        /* Determine vertex liveness. */
        LLVMValueRef vertliveptr = ac_build_alloca(&ctx->ac, ctx->ac.i1, "vertexlive");

        tmp = LLVMBuildICmp(builder, LLVMIntULT, tid, num_emit_threads, "");
        ac_build_ifcc(&ctx->ac, tmp, 5120);
        {
                for (unsigned i = 0; i < verts_per_prim; ++i) {
                        const LLVMValueRef primidx =
                                LLVMBuildAdd(builder, tid,
                                             LLVMConstInt(ctx->ac.i32, i, false), "");

                        if (i > 0) {
                                tmp = LLVMBuildICmp(builder, LLVMIntULT, primidx, num_emit_threads, "");
                                ac_build_ifcc(&ctx->ac, tmp, 5121 + i);
                        }

                        /* Load primitive liveness */
                        tmp = ngg_gs_vertex_ptr(ctx, primidx);
                        LLVMValueRef gep_idx[3] = {
                                ctx->ac.i32_0, /* implicit C-style array */
                                ctx->ac.i32_1, /* second value of struct */
                                ctx->ac.i32_0, /* stream 0 */
                        };
                        tmp = LLVMBuildGEP(builder, tmp, gep_idx, 3, "");
                        tmp = LLVMBuildLoad(builder, tmp, "");
                        const LLVMValueRef primlive =
                                LLVMBuildTrunc(builder, tmp, ctx->ac.i1, "");

                        tmp = LLVMBuildLoad(builder, vertliveptr, "");
                        tmp = LLVMBuildOr(builder, tmp, primlive, ""),
                        LLVMBuildStore(builder, tmp, vertliveptr);

                        if (i > 0)
                                ac_build_endif(&ctx->ac, 5121 + i);
                }
        }
        ac_build_endif(&ctx->ac, 5120);

        /* Inclusive scan addition across the current wave. */
        LLVMValueRef vertlive = LLVMBuildLoad(builder, vertliveptr, "");
        struct ac_wg_scan vertlive_scan = {};
        vertlive_scan.op = nir_op_iadd;
        vertlive_scan.enable_reduce = true;
        vertlive_scan.enable_exclusive = true;
        vertlive_scan.src = vertlive;
        vertlive_scan.scratch = ac_build_gep0(&ctx->ac, ctx->gs_ngg_scratch, ctx->ac.i32_0);
        vertlive_scan.waveidx = get_wave_id_in_tg(ctx);
        vertlive_scan.numwaves = get_tgsize(ctx);
        vertlive_scan.maxwaves = 8;

        ac_build_wg_scan(&ctx->ac, &vertlive_scan);

        /* Skip all exports (including index exports) when possible. At least on
         * early gfx10 revisions this is also to avoid hangs.
         */
        LLVMValueRef have_exports =
                LLVMBuildICmp(builder, LLVMIntNE, vertlive_scan.result_reduce, ctx->ac.i32_0, "");
        num_emit_threads =
                LLVMBuildSelect(builder, have_exports, num_emit_threads, ctx->ac.i32_0, "");

        /* Allocate export space. Send this message as early as possible, to
         * hide the latency of the SQ <-> SPI roundtrip.
         *
         * Note: We could consider compacting primitives for export as well.
         *       PA processes 1 non-null prim / clock, but it fetches 4 DW of
         *       prim data per clock and skips null primitives at no additional
         *       cost. So compacting primitives can only be beneficial when
         *       there are 4 or more contiguous null primitives in the export
         *       (in the common case of single-dword prim exports).
         */
        build_sendmsg_gs_alloc_req(ctx, vertlive_scan.result_reduce, num_emit_threads);

        /* Setup the reverse vertex compaction permutation. We re-use stream 1
         * of the primitive liveness flags, relying on the fact that each
         * threadgroup can have at most 256 threads. */
        ac_build_ifcc(&ctx->ac, vertlive, 5130);
        {
                tmp = ngg_gs_vertex_ptr(ctx, vertlive_scan.result_exclusive);
                LLVMValueRef gep_idx[3] = {
                        ctx->ac.i32_0, /* implicit C-style array */
                        ctx->ac.i32_1, /* second value of struct */
                        ctx->ac.i32_1, /* stream 1 */
                };
                tmp = LLVMBuildGEP(builder, tmp, gep_idx, 3, "");
                tmp2 = LLVMBuildTrunc(builder, tid, ctx->ac.i8, "");
                LLVMBuildStore(builder, tmp2, tmp);
        }
        ac_build_endif(&ctx->ac, 5130);

        ac_build_s_barrier(&ctx->ac);

        /* Export primitive data */
        tmp = LLVMBuildICmp(builder, LLVMIntULT, tid, num_emit_threads, "");
        ac_build_ifcc(&ctx->ac, tmp, 5140);
        {
                struct ngg_prim prim = {};
                prim.num_vertices = verts_per_prim;

                tmp = ngg_gs_vertex_ptr(ctx, tid);
                LLVMValueRef gep_idx[3] = {
                        ctx->ac.i32_0, /* implicit C-style array */
                        ctx->ac.i32_1, /* second value of struct */
                        ctx->ac.i32_0, /* primflag */
                };
                tmp = LLVMBuildGEP(builder, tmp, gep_idx, 3, "");
                tmp = LLVMBuildLoad(builder, tmp, "");
                prim.isnull = LLVMBuildICmp(builder, LLVMIntEQ, tmp,
                                            LLVMConstInt(ctx->ac.i8, 0, false), "");

                for (unsigned i = 0; i < verts_per_prim; ++i) {
                        prim.index[i] = LLVMBuildSub(builder, vertlive_scan.result_exclusive,
                                LLVMConstInt(ctx->ac.i32, verts_per_prim - i - 1, false), "");
                        prim.edgeflag[i] = ctx->ac.i1false;
                }

                build_export_prim(ctx, &prim);
        }
        ac_build_endif(&ctx->ac, 5140);

        /* Export position and parameter data */
        tmp = LLVMBuildICmp(builder, LLVMIntULT, tid, vertlive_scan.result_reduce, "");
        ac_build_ifcc(&ctx->ac, tmp, 5145);
        {
                struct radv_vs_output_info *outinfo = &ctx->shader_info->vs.outinfo;
                struct radv_shader_output_values *outputs;
                unsigned noutput = 0;

                /* Allocate a temporary array for the output values. */
                unsigned num_outputs = util_bitcount64(ctx->output_mask);
                outputs = calloc(num_outputs, sizeof(outputs[0]));

                memset(outinfo->vs_output_param_offset, AC_EXP_PARAM_UNDEFINED,
                       sizeof(outinfo->vs_output_param_offset));
                outinfo->pos_exports = 0;

                tmp = ngg_gs_vertex_ptr(ctx, tid);
                LLVMValueRef gep_idx[3] = {
                        ctx->ac.i32_0, /* implicit C-style array */
                        ctx->ac.i32_1, /* second value of struct */
                        ctx->ac.i32_1, /* stream 1: source data index */
                };
                tmp = LLVMBuildGEP(builder, tmp, gep_idx, 3, "");
                tmp = LLVMBuildLoad(builder, tmp, "");
                tmp = LLVMBuildZExt(builder, tmp, ctx->ac.i32, "");
                const LLVMValueRef vertexptr = ngg_gs_vertex_ptr(ctx, tmp);

                if (ctx->output_mask & (1ull << VARYING_SLOT_PSIZ)) {
                        outinfo->writes_pointsize = true;
                }

                if (ctx->output_mask & (1ull << VARYING_SLOT_LAYER)) {
                        outinfo->writes_layer = true;
                }

                if (ctx->output_mask & (1ull << VARYING_SLOT_VIEWPORT)) {
                        outinfo->writes_viewport_index = true;
                }

                unsigned out_idx = 0;
                gep_idx[1] = ctx->ac.i32_0;
                for (unsigned i = 0; i < AC_LLVM_MAX_OUTPUTS; ++i) {
                        if (!(ctx->output_mask & (1ull << i)))
                                continue;

                        outputs[noutput].slot_name = i;
                        outputs[noutput].slot_index = i == VARYING_SLOT_CLIP_DIST1;

                        outputs[noutput].usage_mask = ctx->shader_info->info.gs.output_usage_mask[i];

                        for (unsigned j = 0; j < 4; j++, out_idx++) {
                                gep_idx[2] = LLVMConstInt(ctx->ac.i32, out_idx, false);
                                tmp = LLVMBuildGEP(builder, vertexptr, gep_idx, 3, "");
                                tmp = LLVMBuildLoad(builder, tmp, "");
                                outputs[noutput].values[j] = ac_to_float(&ctx->ac, tmp);
                        }

                        noutput++;
                }

                radv_llvm_export_vs(ctx, outputs, noutput, outinfo, false);
                FREE(outputs);
        }
        ac_build_endif(&ctx->ac, 5145);
}

static void gfx10_ngg_gs_emit_vertex(struct radv_shader_context *ctx,
                                     unsigned stream,
                                     LLVMValueRef *addrs)
{
        LLVMBuilderRef builder = ctx->ac.builder;
        LLVMValueRef tmp;
        const LLVMValueRef vertexidx =
                LLVMBuildLoad(builder, ctx->gs_next_vertex[stream], "");

        /* If this thread has already emitted the declared maximum number of
         * vertices, skip the write: excessive vertex emissions are not
         * supposed to have any effect.
         */
        const LLVMValueRef can_emit =
                LLVMBuildICmp(builder, LLVMIntULT, vertexidx,
                              LLVMConstInt(ctx->ac.i32, ctx->gs_max_out_vertices, false), "");
        ac_build_kill_if_false(&ctx->ac, can_emit);

        tmp = LLVMBuildAdd(builder, vertexidx, ctx->ac.i32_1, "");
        tmp = LLVMBuildSelect(builder, can_emit, tmp, vertexidx, "");
        LLVMBuildStore(builder, tmp, ctx->gs_next_vertex[stream]);

        const LLVMValueRef vertexptr =
                ngg_gs_emit_vertex_ptr(ctx, get_thread_id_in_tg(ctx), vertexidx);
        unsigned out_idx = 0;
        for (unsigned i = 0; i < AC_LLVM_MAX_OUTPUTS; ++i) {
                unsigned output_usage_mask =
                        ctx->shader_info->info.gs.output_usage_mask[i];
                uint8_t output_stream =
                        ctx->shader_info->info.gs.output_streams[i];
                LLVMValueRef *out_ptr = &addrs[i * 4];
                int length = util_last_bit(output_usage_mask);

                if (!(ctx->output_mask & (1ull << i)) ||
                    output_stream != stream)
                        continue;

                for (unsigned j = 0; j < length; j++, out_idx++) {
                        if (!(output_usage_mask & (1 << j)))
                                continue;

                        LLVMValueRef out_val = LLVMBuildLoad(ctx->ac.builder,
                                                             out_ptr[j], "");
                        LLVMValueRef gep_idx[3] = {
                                ctx->ac.i32_0, /* implied C-style array */
                                ctx->ac.i32_0, /* first entry of struct */
                                LLVMConstInt(ctx->ac.i32, out_idx, false),
                        };
                        LLVMValueRef ptr = LLVMBuildGEP(builder, vertexptr, gep_idx, 3, "");

                        out_val = ac_to_integer(&ctx->ac, out_val);
                        LLVMBuildStore(builder, out_val, ptr);
                }
        }
        assert(out_idx * 4 <= ctx->gsvs_vertex_size);

        /* Determine and store whether this vertex completed a primitive. */
        const LLVMValueRef curverts = LLVMBuildLoad(builder, ctx->gs_curprim_verts[stream], "");

        tmp = LLVMConstInt(ctx->ac.i32, si_conv_gl_prim_to_vertices(ctx->gs_output_prim) - 1, false);
        const LLVMValueRef iscompleteprim =
                LLVMBuildICmp(builder, LLVMIntUGE, curverts, tmp, "");

        tmp = LLVMBuildAdd(builder, curverts, ctx->ac.i32_1, "");
        LLVMBuildStore(builder, tmp, ctx->gs_curprim_verts[stream]);

        LLVMValueRef gep_idx[3] = {
                ctx->ac.i32_0, /* implied C-style array */
                ctx->ac.i32_1, /* second struct entry */
                LLVMConstInt(ctx->ac.i32, stream, false),
        };
        const LLVMValueRef primflagptr =
                LLVMBuildGEP(builder, vertexptr, gep_idx, 3, "");

        tmp = LLVMBuildZExt(builder, iscompleteprim, ctx->ac.i8, "");
        LLVMBuildStore(builder, tmp, primflagptr);

        tmp = LLVMBuildLoad(builder, ctx->gs_generated_prims[stream], "");
        tmp = LLVMBuildAdd(builder, tmp, LLVMBuildZExt(builder, iscompleteprim, ctx->ac.i32, ""), "");
        LLVMBuildStore(builder, tmp, ctx->gs_generated_prims[stream]);
}

static void
write_tess_factors(struct radv_shader_context *ctx)
{
        unsigned stride, outer_comps, inner_comps;
        struct ac_build_if_state if_ctx, inner_if_ctx;
        LLVMValueRef invocation_id = ac_unpack_param(&ctx->ac, ctx->abi.tcs_rel_ids, 8, 5);
        LLVMValueRef rel_patch_id = ac_unpack_param(&ctx->ac, ctx->abi.tcs_rel_ids, 0, 8);
        unsigned tess_inner_index = 0, tess_outer_index;
        LLVMValueRef lds_base, lds_inner = NULL, lds_outer, byteoffset, buffer;
        LLVMValueRef out[6], vec0, vec1, tf_base, inner[4], outer[4];
        int i;
        ac_emit_barrier(&ctx->ac, ctx->stage);

        switch (ctx->options->key.tcs.primitive_mode) {
        case GL_ISOLINES:
                stride = 2;
                outer_comps = 2;
                inner_comps = 0;
                break;
        case GL_TRIANGLES:
                stride = 4;
                outer_comps = 3;
                inner_comps = 1;
                break;
        case GL_QUADS:
                stride = 6;
                outer_comps = 4;
                inner_comps = 2;
                break;
        default:
                return;
        }

        ac_nir_build_if(&if_ctx, ctx,
                        LLVMBuildICmp(ctx->ac.builder, LLVMIntEQ,
                                      invocation_id, ctx->ac.i32_0, ""));

        lds_base = get_tcs_out_current_patch_data_offset(ctx);

        if (inner_comps) {
                tess_inner_index = shader_io_get_unique_index(VARYING_SLOT_TESS_LEVEL_INNER);
                lds_inner = LLVMBuildAdd(ctx->ac.builder, lds_base,
                                         LLVMConstInt(ctx->ac.i32, tess_inner_index * 4, false), "");
        }

        tess_outer_index = shader_io_get_unique_index(VARYING_SLOT_TESS_LEVEL_OUTER);
        lds_outer = LLVMBuildAdd(ctx->ac.builder, lds_base,
                                 LLVMConstInt(ctx->ac.i32, tess_outer_index * 4, false), "");

        for (i = 0; i < 4; i++) {
                inner[i] = LLVMGetUndef(ctx->ac.i32);
                outer[i] = LLVMGetUndef(ctx->ac.i32);
        }

        // LINES reversal
        if (ctx->options->key.tcs.primitive_mode == GL_ISOLINES) {
                outer[0] = out[1] = ac_lds_load(&ctx->ac, lds_outer);
                lds_outer = LLVMBuildAdd(ctx->ac.builder, lds_outer,
                                         ctx->ac.i32_1, "");
                outer[1] = out[0] = ac_lds_load(&ctx->ac, lds_outer);
        } else {
                for (i = 0; i < outer_comps; i++) {
                        outer[i] = out[i] =
                                ac_lds_load(&ctx->ac, lds_outer);
                        lds_outer = LLVMBuildAdd(ctx->ac.builder, lds_outer,
                                                 ctx->ac.i32_1, "");
                }
                for (i = 0; i < inner_comps; i++) {
                        inner[i] = out[outer_comps+i] =
                                ac_lds_load(&ctx->ac, lds_inner);
                        lds_inner = LLVMBuildAdd(ctx->ac.builder, lds_inner,
                                                 ctx->ac.i32_1, "");
                }
        }

        /* Convert the outputs to vectors for stores. */
        vec0 = ac_build_gather_values(&ctx->ac, out, MIN2(stride, 4));
        vec1 = NULL;

        if (stride > 4)
                vec1 = ac_build_gather_values(&ctx->ac, out + 4, stride - 4);


        buffer = ctx->hs_ring_tess_factor;
        tf_base = ctx->tess_factor_offset;
        byteoffset = LLVMBuildMul(ctx->ac.builder, rel_patch_id,
                                  LLVMConstInt(ctx->ac.i32, 4 * stride, false), "");
        unsigned tf_offset = 0;

        if (ctx->options->chip_class <= GFX8) {
                ac_nir_build_if(&inner_if_ctx, ctx,
                                LLVMBuildICmp(ctx->ac.builder, LLVMIntEQ,
                                              rel_patch_id, ctx->ac.i32_0, ""));

                /* Store the dynamic HS control word. */
                ac_build_buffer_store_dword(&ctx->ac, buffer,
                                            LLVMConstInt(ctx->ac.i32, 0x80000000, false),
                                            1, ctx->ac.i32_0, tf_base,
                                            0, ac_glc, false);
                tf_offset += 4;

                ac_nir_build_endif(&inner_if_ctx);
        }

        /* Store the tessellation factors. */
        ac_build_buffer_store_dword(&ctx->ac, buffer, vec0,
                                    MIN2(stride, 4), byteoffset, tf_base,
                                    tf_offset, ac_glc, false);
        if (vec1)
                ac_build_buffer_store_dword(&ctx->ac, buffer, vec1,
                                            stride - 4, byteoffset, tf_base,
                                            16 + tf_offset, ac_glc, false);

        //store to offchip for TES to read - only if TES reads them
        if (ctx->options->key.tcs.tes_reads_tess_factors) {
                LLVMValueRef inner_vec, outer_vec, tf_outer_offset;
                LLVMValueRef tf_inner_offset;
                unsigned param_outer, param_inner;

                param_outer = shader_io_get_unique_index(VARYING_SLOT_TESS_LEVEL_OUTER);
                tf_outer_offset = get_tcs_tes_buffer_address(ctx, NULL,
                                                             LLVMConstInt(ctx->ac.i32, param_outer, 0));

                outer_vec = ac_build_gather_values(&ctx->ac, outer,
                                                   util_next_power_of_two(outer_comps));

                ac_build_buffer_store_dword(&ctx->ac, ctx->hs_ring_tess_offchip, outer_vec,
                                            outer_comps, tf_outer_offset,
                                            ctx->oc_lds, 0, ac_glc, false);
                if (inner_comps) {
                        param_inner = shader_io_get_unique_index(VARYING_SLOT_TESS_LEVEL_INNER);
                        tf_inner_offset = get_tcs_tes_buffer_address(ctx, NULL,
                                                                     LLVMConstInt(ctx->ac.i32, param_inner, 0));

                        inner_vec = inner_comps == 1 ? inner[0] :
                                ac_build_gather_values(&ctx->ac, inner, inner_comps);
                        ac_build_buffer_store_dword(&ctx->ac, ctx->hs_ring_tess_offchip, inner_vec,
                                                    inner_comps, tf_inner_offset,
                                                    ctx->oc_lds, 0, ac_glc, false);
                }
        }
        ac_nir_build_endif(&if_ctx);
}

static void
handle_tcs_outputs_post(struct radv_shader_context *ctx)
{
        write_tess_factors(ctx);
}

static bool
si_export_mrt_color(struct radv_shader_context *ctx,
                    LLVMValueRef *color, unsigned index,
                    struct ac_export_args *args)
{
        /* Export */
        si_llvm_init_export_args(ctx, color, 0xf,
                                 V_008DFC_SQ_EXP_MRT + index, args);
        if (!args->enabled_channels)
                return false; /* unnecessary NULL export */

        return true;
}

static void
radv_export_mrt_z(struct radv_shader_context *ctx,
                  LLVMValueRef depth, LLVMValueRef stencil,
                  LLVMValueRef samplemask)
{
        struct ac_export_args args;

        ac_export_mrt_z(&ctx->ac, depth, stencil, samplemask, &args);

        ac_build_export(&ctx->ac, &args);
}

static void
handle_fs_outputs_post(struct radv_shader_context *ctx)
{
        unsigned index = 0;
        LLVMValueRef depth = NULL, stencil = NULL, samplemask = NULL;
        struct ac_export_args color_args[8];

        for (unsigned i = 0; i < AC_LLVM_MAX_OUTPUTS; ++i) {
                LLVMValueRef values[4];

                if (!(ctx->output_mask & (1ull << i)))
                        continue;

                if (i < FRAG_RESULT_DATA0)
                        continue;

                for (unsigned j = 0; j < 4; j++)
                        values[j] = ac_to_float(&ctx->ac,
                                                radv_load_output(ctx, i, j));

                bool ret = si_export_mrt_color(ctx, values,
                                               i - FRAG_RESULT_DATA0,
                                               &color_args[index]);
                if (ret)
                        index++;
        }

        /* Process depth, stencil, samplemask. */
        if (ctx->shader_info->info.ps.writes_z) {
                depth = ac_to_float(&ctx->ac,
                                    radv_load_output(ctx, FRAG_RESULT_DEPTH, 0));
        }
        if (ctx->shader_info->info.ps.writes_stencil) {
                stencil = ac_to_float(&ctx->ac,
                                      radv_load_output(ctx, FRAG_RESULT_STENCIL, 0));
        }
        if (ctx->shader_info->info.ps.writes_sample_mask) {
                samplemask = ac_to_float(&ctx->ac,
                                         radv_load_output(ctx, FRAG_RESULT_SAMPLE_MASK, 0));
        }

        /* Set the DONE bit on last non-null color export only if Z isn't
         * exported.
         */
        if (index > 0 &&
            !ctx->shader_info->info.ps.writes_z &&
            !ctx->shader_info->info.ps.writes_stencil &&
            !ctx->shader_info->info.ps.writes_sample_mask) {
                unsigned last = index - 1;

               color_args[last].valid_mask = 1; /* whether the EXEC mask is valid */
               color_args[last].done = 1; /* DONE bit */
        }

        /* Export PS outputs. */
        for (unsigned i = 0; i < index; i++)
                ac_build_export(&ctx->ac, &color_args[i]);

        if (depth || stencil || samplemask)
                radv_export_mrt_z(ctx, depth, stencil, samplemask);
        else if (!index)
                ac_build_export_null(&ctx->ac);
}

static void
emit_gs_epilogue(struct radv_shader_context *ctx)
{
        if (ctx->options->key.vs_common_out.as_ngg) {
                gfx10_ngg_gs_emit_epilogue_1(ctx);
                return;
        }

        if (ctx->ac.chip_class >= GFX10)
                LLVMBuildFence(ctx->ac.builder, LLVMAtomicOrderingRelease, false, "");

        ac_build_sendmsg(&ctx->ac, AC_SENDMSG_GS_OP_NOP | AC_SENDMSG_GS_DONE, ctx->gs_wave_id);
}

static void
handle_shader_outputs_post(struct ac_shader_abi *abi, unsigned max_outputs,
                           LLVMValueRef *addrs)
{
        struct radv_shader_context *ctx = radv_shader_context_from_abi(abi);

        switch (ctx->stage) {
        case MESA_SHADER_VERTEX:
                if (ctx->options->key.vs_common_out.as_ls)
                        handle_ls_outputs_post(ctx);
                else if (ctx->options->key.vs_common_out.as_es)
                        handle_es_outputs_post(ctx, &ctx->shader_info->vs.es_info);
                else if (ctx->options->key.vs_common_out.as_ngg)
                        break; /* handled outside of the shader body */
                else
                        handle_vs_outputs_post(ctx, ctx->options->key.vs_common_out.export_prim_id,
                                               ctx->options->key.vs_common_out.export_clip_dists,
                                               &ctx->shader_info->vs.outinfo);
                break;
        case MESA_SHADER_FRAGMENT:
                handle_fs_outputs_post(ctx);
                break;
        case MESA_SHADER_GEOMETRY:
                emit_gs_epilogue(ctx);
                break;
        case MESA_SHADER_TESS_CTRL:
                handle_tcs_outputs_post(ctx);
                break;
        case MESA_SHADER_TESS_EVAL:
                if (ctx->options->key.vs_common_out.as_ngg)
                        break; /* handled outside of the shader body */
                else if (ctx->options->key.vs_common_out.as_es)
                        handle_es_outputs_post(ctx, &ctx->shader_info->tes.es_info);
                else
                        handle_vs_outputs_post(ctx, ctx->options->key.vs_common_out.export_prim_id,
                                               ctx->options->key.vs_common_out.export_clip_dists,
                                               &ctx->shader_info->tes.outinfo);
                break;
        default:
                break;
        }
}

static void ac_llvm_finalize_module(struct radv_shader_context *ctx,
                                    LLVMPassManagerRef passmgr,
                                    const struct radv_nir_compiler_options *options)
{
        LLVMRunPassManager(passmgr, ctx->ac.module);
        LLVMDisposeBuilder(ctx->ac.builder);

        ac_llvm_context_dispose(&ctx->ac);
}

static void
ac_nir_eliminate_const_vs_outputs(struct radv_shader_context *ctx)
{
        struct radv_vs_output_info *outinfo;

        switch (ctx->stage) {
        case MESA_SHADER_FRAGMENT:
        case MESA_SHADER_COMPUTE:
        case MESA_SHADER_TESS_CTRL:
        case MESA_SHADER_GEOMETRY:
                return;
        case MESA_SHADER_VERTEX:
                if (ctx->options->key.vs_common_out.as_ls ||
                    ctx->options->key.vs_common_out.as_es)
                        return;
                outinfo = &ctx->shader_info->vs.outinfo;
                break;
        case MESA_SHADER_TESS_EVAL:
                if (ctx->options->key.vs_common_out.as_es)
                        return;
                outinfo = &ctx->shader_info->tes.outinfo;
                break;
        default:
                unreachable("Unhandled shader type");
        }

        ac_optimize_vs_outputs(&ctx->ac,
                               ctx->main_function,
                               outinfo->vs_output_param_offset,
                               VARYING_SLOT_MAX,
                               &outinfo->param_exports);
}

static void
ac_setup_rings(struct radv_shader_context *ctx)
{
        if (ctx->options->chip_class <= GFX8 &&
            (ctx->stage == MESA_SHADER_GEOMETRY ||
             ctx->options->key.vs_common_out.as_es || ctx->options->key.vs_common_out.as_es)) {
                unsigned ring = ctx->stage == MESA_SHADER_GEOMETRY ? RING_ESGS_GS
                                                                   : RING_ESGS_VS;
                LLVMValueRef offset = LLVMConstInt(ctx->ac.i32, ring, false);

                ctx->esgs_ring = ac_build_load_to_sgpr(&ctx->ac,
                                                       ctx->ring_offsets,
                                                       offset);
        }

        if (ctx->is_gs_copy_shader) {
                ctx->gsvs_ring[0] =
                        ac_build_load_to_sgpr(&ctx->ac, ctx->ring_offsets,
                                              LLVMConstInt(ctx->ac.i32,
                                                           RING_GSVS_VS, false));
        }

        if (ctx->stage == MESA_SHADER_GEOMETRY) {
                /* The conceptual layout of the GSVS ring is
                 *   v0c0 .. vLv0 v0c1 .. vLc1 ..
                 * but the real memory layout is swizzled across
                 * threads:
                 *   t0v0c0 .. t15v0c0 t0v1c0 .. t15v1c0 ... t15vLcL
                 *   t16v0c0 ..
                 * Override the buffer descriptor accordingly.
                 */
                LLVMTypeRef v2i64 = LLVMVectorType(ctx->ac.i64, 2);
                uint64_t stream_offset = 0;
                unsigned num_records = 64;
                LLVMValueRef base_ring;

                base_ring =
                        ac_build_load_to_sgpr(&ctx->ac, ctx->ring_offsets,
                                              LLVMConstInt(ctx->ac.i32,
                                                           RING_GSVS_GS, false));

                for (unsigned stream = 0; stream < 4; stream++) {
                        unsigned num_components, stride;
                        LLVMValueRef ring, tmp;

                        num_components =
                                ctx->shader_info->info.gs.num_stream_output_components[stream];

                        if (!num_components)
                                continue;

                        stride = 4 * num_components * ctx->gs_max_out_vertices;

                        /* Limit on the stride field for <= GFX7. */
                        assert(stride < (1 << 14));

                        ring = LLVMBuildBitCast(ctx->ac.builder,
                                                base_ring, v2i64, "");
                        tmp = LLVMBuildExtractElement(ctx->ac.builder,
                                                      ring, ctx->ac.i32_0, "");
                        tmp = LLVMBuildAdd(ctx->ac.builder, tmp,
                                           LLVMConstInt(ctx->ac.i64,
                                                        stream_offset, 0), "");
                        ring = LLVMBuildInsertElement(ctx->ac.builder,
                                                      ring, tmp, ctx->ac.i32_0, "");

                        stream_offset += stride * 64;

                        ring = LLVMBuildBitCast(ctx->ac.builder, ring,
                                                ctx->ac.v4i32, "");

                        tmp = LLVMBuildExtractElement(ctx->ac.builder, ring,
                                                      ctx->ac.i32_1, "");
                        tmp = LLVMBuildOr(ctx->ac.builder, tmp,
                                          LLVMConstInt(ctx->ac.i32,
                                                       S_008F04_STRIDE(stride), false), "");
                        ring = LLVMBuildInsertElement(ctx->ac.builder, ring, tmp,
                                                      ctx->ac.i32_1, "");

                        ring = LLVMBuildInsertElement(ctx->ac.builder, ring,
                                                      LLVMConstInt(ctx->ac.i32,
                                                                   num_records, false),
                                                      LLVMConstInt(ctx->ac.i32, 2, false), "");

                        ctx->gsvs_ring[stream] = ring;
                }
        }

        if (ctx->stage == MESA_SHADER_TESS_CTRL ||
            ctx->stage == MESA_SHADER_TESS_EVAL) {
                ctx->hs_ring_tess_offchip = ac_build_load_to_sgpr(&ctx->ac, ctx->ring_offsets, LLVMConstInt(ctx->ac.i32, RING_HS_TESS_OFFCHIP, false));
                ctx->hs_ring_tess_factor = ac_build_load_to_sgpr(&ctx->ac, ctx->ring_offsets, LLVMConstInt(ctx->ac.i32, RING_HS_TESS_FACTOR, false));
        }
}

unsigned
radv_nir_get_max_workgroup_size(enum chip_class chip_class,
                                const struct nir_shader *nir)
{
        switch (nir->info.stage) {
        case MESA_SHADER_TESS_CTRL:
                return chip_class >= GFX7 ? 128 : 64;
        case MESA_SHADER_GEOMETRY:
                return chip_class >= GFX9 ? 128 : 64;
        case MESA_SHADER_COMPUTE:
                break;
        default:
                return 0;
        }

        unsigned max_workgroup_size = nir->info.cs.local_size[0] *
                nir->info.cs.local_size[1] *
                nir->info.cs.local_size[2];
        return max_workgroup_size;
}

/* Fixup the HW not emitting the TCS regs if there are no HS threads. */
static void ac_nir_fixup_ls_hs_input_vgprs(struct radv_shader_context *ctx)
{
        LLVMValueRef count = ac_unpack_param(&ctx->ac, ctx->merged_wave_info, 8, 8);
        LLVMValueRef hs_empty = LLVMBuildICmp(ctx->ac.builder, LLVMIntEQ, count,
                                              ctx->ac.i32_0, "");
        ctx->abi.instance_id = LLVMBuildSelect(ctx->ac.builder, hs_empty, ctx->rel_auto_id, ctx->abi.instance_id, "");
        ctx->rel_auto_id = LLVMBuildSelect(ctx->ac.builder, hs_empty, ctx->abi.tcs_rel_ids, ctx->rel_auto_id, "");
        ctx->abi.vertex_id = LLVMBuildSelect(ctx->ac.builder, hs_empty, ctx->abi.tcs_patch_id, ctx->abi.vertex_id, "");
}

static void prepare_gs_input_vgprs(struct radv_shader_context *ctx)
{
        for(int i = 5; i >= 0; --i) {
                ctx->gs_vtx_offset[i] = ac_unpack_param(&ctx->ac, ctx->gs_vtx_offset[i & ~1],
                                                        (i & 1) * 16, 16);
        }

        ctx->gs_wave_id = ac_unpack_param(&ctx->ac, ctx->merged_wave_info, 16, 8);
}


static
LLVMModuleRef ac_translate_nir_to_llvm(struct ac_llvm_compiler *ac_llvm,
                                       struct nir_shader *const *shaders,
                                       int shader_count,
                                       struct radv_shader_variant_info *shader_info,
                                       const struct radv_nir_compiler_options *options)
{
        struct radv_shader_context ctx = {0};
        unsigned i;
        ctx.options = options;
        ctx.shader_info = shader_info;

        ac_llvm_context_init(&ctx.ac, options->chip_class, options->family);
        ctx.context = ctx.ac.context;
        ctx.ac.module = ac_create_module(ac_llvm->tm, ctx.context);

        enum ac_float_mode float_mode =
                options->unsafe_math ? AC_FLOAT_MODE_UNSAFE_FP_MATH :
                                       AC_FLOAT_MODE_DEFAULT;

        ctx.ac.builder = ac_create_builder(ctx.context, float_mode);

        radv_nir_shader_info_init(&shader_info->info);

        for(int i = 0; i < shader_count; ++i)
                radv_nir_shader_info_pass(shaders[i], options, &shader_info->info);

        for (i = 0; i < RADV_UD_MAX_SETS; i++)
                shader_info->user_sgprs_locs.descriptor_sets[i].sgpr_idx = -1;
        for (i = 0; i < AC_UD_MAX_UD; i++)
                shader_info->user_sgprs_locs.shader_data[i].sgpr_idx = -1;

        ctx.max_workgroup_size = 0;
        for (int i = 0; i < shader_count; ++i) {
                ctx.max_workgroup_size = MAX2(ctx.max_workgroup_size,
                                              radv_nir_get_max_workgroup_size(ctx.options->chip_class,
                                                                            shaders[i]));
        }

        if (ctx.ac.chip_class >= GFX10) {
                if (is_pre_gs_stage(shaders[0]->info.stage) &&
                    options->key.vs_common_out.as_ngg) {
                        ctx.max_workgroup_size = 128;
                }
        }

        create_function(&ctx, shaders[shader_count - 1]->info.stage, shader_count >= 2,
                        shader_count >= 2 ? shaders[shader_count - 2]->info.stage  : MESA_SHADER_VERTEX);

        ctx.abi.inputs = &ctx.inputs[0];
        ctx.abi.emit_outputs = handle_shader_outputs_post;
        ctx.abi.emit_vertex = visit_emit_vertex;
        ctx.abi.load_ubo = radv_load_ubo;
        ctx.abi.load_ssbo = radv_load_ssbo;
        ctx.abi.load_sampler_desc = radv_get_sampler_desc;
        ctx.abi.load_resource = radv_load_resource;
        ctx.abi.clamp_shadow_reference = false;
        ctx.abi.gfx9_stride_size_workaround = ctx.ac.chip_class == GFX9 && HAVE_LLVM < 0x800;

        /* Because the new raw/struct atomic intrinsics are buggy with LLVM 8,
         * we fallback to the old intrinsics for atomic buffer image operations
         * and thus we need to apply the indexing workaround...
         */
        ctx.abi.gfx9_stride_size_workaround_for_atomic = ctx.ac.chip_class == GFX9 && HAVE_LLVM < 0x900;

        bool is_ngg = is_pre_gs_stage(shaders[0]->info.stage) &&  ctx.options->key.vs_common_out.as_ngg;
        if (shader_count >= 2 || is_ngg)
                ac_init_exec_full_mask(&ctx.ac);

        if ((ctx.ac.family == CHIP_VEGA10 ||
             ctx.ac.family == CHIP_RAVEN) &&
            shaders[shader_count - 1]->info.stage == MESA_SHADER_TESS_CTRL)
                ac_nir_fixup_ls_hs_input_vgprs(&ctx);

        for(int i = 0; i < shader_count; ++i) {
                ctx.stage = shaders[i]->info.stage;
                ctx.output_mask = 0;

                if (shaders[i]->info.stage == MESA_SHADER_GEOMETRY) {
                        for (int i = 0; i < 4; i++) {
                                ctx.gs_next_vertex[i] =
                                        ac_build_alloca(&ctx.ac, ctx.ac.i32, "");
                        }
                        if (ctx.options->key.vs_common_out.as_ngg) {
                                for (unsigned i = 0; i < 4; ++i) {
                                        ctx.gs_curprim_verts[i] =
                                                ac_build_alloca(&ctx.ac, ctx.ac.i32, "");
                                        ctx.gs_generated_prims[i] =
                                                ac_build_alloca(&ctx.ac, ctx.ac.i32, "");
                                }

                                /* TODO: streamout */

                                LLVMTypeRef ai32 = LLVMArrayType(ctx.ac.i32, 8);
                                ctx.gs_ngg_scratch =
                                        LLVMAddGlobalInAddressSpace(ctx.ac.module,
                                                                    ai32, "ngg_scratch", AC_ADDR_SPACE_LDS);
                                LLVMSetInitializer(ctx.gs_ngg_scratch, LLVMGetUndef(ai32));
                                LLVMSetAlignment(ctx.gs_ngg_scratch, 4);

                                ctx.gs_ngg_emit = LLVMBuildIntToPtr(ctx.ac.builder, ctx.ac.i32_0,
                                        LLVMPointerType(LLVMArrayType(ctx.ac.i32, 0), AC_ADDR_SPACE_LDS),
                                        "ngg_emit");
                                LLVMSetAlignment(ctx.gs_ngg_emit, 4);
                        }

                        ctx.gs_max_out_vertices = shaders[i]->info.gs.vertices_out;
                        ctx.gs_output_prim = shaders[i]->info.gs.output_primitive;
                        ctx.abi.load_inputs = load_gs_input;
                        ctx.abi.emit_primitive = visit_end_primitive;
                } else if (shaders[i]->info.stage == MESA_SHADER_TESS_CTRL) {
                        ctx.tcs_outputs_read = shaders[i]->info.outputs_read;
                        ctx.tcs_patch_outputs_read = shaders[i]->info.patch_outputs_read;
                        ctx.abi.load_tess_varyings = load_tcs_varyings;
                        ctx.abi.load_patch_vertices_in = load_patch_vertices_in;
                        ctx.abi.store_tcs_outputs = store_tcs_output;
                        ctx.tcs_vertices_per_patch = shaders[i]->info.tess.tcs_vertices_out;
                        if (shader_count == 1)
                                ctx.tcs_num_inputs = ctx.options->key.tcs.num_inputs;
                        else
                                ctx.tcs_num_inputs = util_last_bit64(shader_info->info.vs.ls_outputs_written);
                        ctx.tcs_num_patches = get_tcs_num_patches(&ctx);
                } else if (shaders[i]->info.stage == MESA_SHADER_TESS_EVAL) {
                        ctx.tes_primitive_mode = shaders[i]->info.tess.primitive_mode;
                        ctx.abi.load_tess_varyings = load_tes_input;
                        ctx.abi.load_tess_coord = load_tess_coord;
                        ctx.abi.load_patch_vertices_in = load_patch_vertices_in;
                        ctx.tcs_vertices_per_patch = shaders[i]->info.tess.tcs_vertices_out;
                        ctx.tcs_num_patches = ctx.options->key.tes.num_patches;
                } else if (shaders[i]->info.stage == MESA_SHADER_VERTEX) {
                        ctx.abi.load_base_vertex = radv_load_base_vertex;
                } else if (shaders[i]->info.stage == MESA_SHADER_FRAGMENT) {
                        shader_info->fs.can_discard = shaders[i]->info.fs.uses_discard;
                        ctx.abi.lookup_interp_param = lookup_interp_param;
                        ctx.abi.load_sample_position = load_sample_position;
                        ctx.abi.load_sample_mask_in = load_sample_mask_in;
                        ctx.abi.emit_kill = radv_emit_kill;
                }

                if (i)
                        ac_emit_barrier(&ctx.ac, ctx.stage);

                nir_foreach_variable(variable, &shaders[i]->outputs)
                        scan_shader_output_decl(&ctx, variable, shaders[i], shaders[i]->info.stage);

                if (shaders[i]->info.stage == MESA_SHADER_GEOMETRY) {
                        unsigned addclip = shaders[i]->info.clip_distance_array_size +
                                        shaders[i]->info.cull_distance_array_size > 4;
                        ctx.gsvs_vertex_size = (util_bitcount64(ctx.output_mask) + addclip) * 16;
                        ctx.max_gsvs_emit_size = ctx.gsvs_vertex_size *
                                shaders[i]->info.gs.vertices_out;
                }

                ac_setup_rings(&ctx);

                LLVMBasicBlockRef merge_block;
                if (shader_count >= 2 || is_ngg) {

                        if (shaders[i]->info.stage == MESA_SHADER_GEOMETRY &&
                            ctx.options->key.vs_common_out.as_ngg) {
                                gfx10_ngg_gs_emit_prologue(&ctx);
                        }

                        LLVMValueRef fn = LLVMGetBasicBlockParent(LLVMGetInsertBlock(ctx.ac.builder));
                        LLVMBasicBlockRef then_block = LLVMAppendBasicBlockInContext(ctx.ac.context, fn, "");
                        merge_block = LLVMAppendBasicBlockInContext(ctx.ac.context, fn, "");

                        LLVMValueRef count = ac_unpack_param(&ctx.ac, ctx.merged_wave_info, 8 * i, 8);
                        LLVMValueRef thread_id = ac_get_thread_id(&ctx.ac);
                        LLVMValueRef cond = LLVMBuildICmp(ctx.ac.builder, LLVMIntULT,
                                                          thread_id, count, "");
                        LLVMBuildCondBr(ctx.ac.builder, cond, then_block, merge_block);

                        LLVMPositionBuilderAtEnd(ctx.ac.builder, then_block);
                }

                if (shaders[i]->info.stage == MESA_SHADER_FRAGMENT)
                        prepare_interp_optimize(&ctx, shaders[i]);
                else if(shaders[i]->info.stage == MESA_SHADER_VERTEX)
                        handle_vs_inputs(&ctx, shaders[i]);
                else if(shader_count >= 2 && shaders[i]->info.stage == MESA_SHADER_GEOMETRY)
                        prepare_gs_input_vgprs(&ctx);

                ac_nir_translate(&ctx.ac, &ctx.abi, shaders[i]);

                if (shader_count >= 2 || is_ngg) {
                        LLVMBuildBr(ctx.ac.builder, merge_block);
                        LLVMPositionBuilderAtEnd(ctx.ac.builder, merge_block);
                }

                /* This needs to be outside the if wrapping the shader body, as sometimes
                 * the HW generates waves with 0 es/vs threads. */
                if (is_pre_gs_stage(shaders[i]->info.stage) &&
                    ctx.options->key.vs_common_out.as_ngg &&
                    i == shader_count - 1) {
                        handle_ngg_outputs_post(&ctx);
                } else if (shaders[i]->info.stage == MESA_SHADER_GEOMETRY &&
                           ctx.options->key.vs_common_out.as_ngg) {
                        gfx10_ngg_gs_emit_epilogue_2(&ctx);
                }

                if (shaders[i]->info.stage == MESA_SHADER_GEOMETRY) {
                        shader_info->gs.gsvs_vertex_size = ctx.gsvs_vertex_size;
                        shader_info->gs.max_gsvs_emit_size = ctx.max_gsvs_emit_size;
                } else if (shaders[i]->info.stage == MESA_SHADER_TESS_CTRL) {
                        shader_info->tcs.num_patches = ctx.tcs_num_patches;
                        shader_info->tcs.lds_size = calculate_tess_lds_size(&ctx);
                }
        }

        LLVMBuildRetVoid(ctx.ac.builder);

        if (options->dump_preoptir)
                ac_dump_module(ctx.ac.module);

        ac_llvm_finalize_module(&ctx, ac_llvm->passmgr, options);

        if (shader_count == 1)
                ac_nir_eliminate_const_vs_outputs(&ctx);

        if (options->dump_shader) {
                ctx.shader_info->private_mem_vgprs =
                        ac_count_scratch_private_memory(ctx.main_function);
        }

        return ctx.ac.module;
}

static void ac_diagnostic_handler(LLVMDiagnosticInfoRef di, void *context)
{
        unsigned *retval = (unsigned *)context;
        LLVMDiagnosticSeverity severity = LLVMGetDiagInfoSeverity(di);
        char *description = LLVMGetDiagInfoDescription(di);

        if (severity == LLVMDSError) {
                *retval = 1;
                fprintf(stderr, "LLVM triggered Diagnostic Handler: %s\n",
                        description);
        }

        LLVMDisposeMessage(description);
}

static unsigned radv_llvm_compile(LLVMModuleRef M,
                                  char **pelf_buffer, size_t *pelf_size,
                                  struct ac_llvm_compiler *ac_llvm)
{
        unsigned retval = 0;
        LLVMContextRef llvm_ctx;

        /* Setup Diagnostic Handler*/
        llvm_ctx = LLVMGetModuleContext(M);

        LLVMContextSetDiagnosticHandler(llvm_ctx, ac_diagnostic_handler,
                                        &retval);

        /* Compile IR*/
        if (!radv_compile_to_elf(ac_llvm, M, pelf_buffer, pelf_size))
                retval = 1;
        return retval;
}

static void ac_compile_llvm_module(struct ac_llvm_compiler *ac_llvm,
                                   LLVMModuleRef llvm_module,
                                   struct radv_shader_binary **rbinary,
                                   struct radv_shader_variant_info *shader_info,
                                   gl_shader_stage stage,
                                   const struct radv_nir_compiler_options *options)
{
        char *elf_buffer = NULL;
        size_t elf_size = 0;
        char *llvm_ir_string = NULL;
        if (options->dump_shader)
                ac_dump_module(llvm_module);

        if (options->record_llvm_ir) {
                char *llvm_ir = LLVMPrintModuleToString(llvm_module);
                llvm_ir_string = strdup(llvm_ir);
                LLVMDisposeMessage(llvm_ir);
        }

        int v = radv_llvm_compile(llvm_module, &elf_buffer, &elf_size, ac_llvm);
        if (v) {
                fprintf(stderr, "compile failed\n");
        }

        LLVMContextRef ctx = LLVMGetModuleContext(llvm_module);
        LLVMDisposeModule(llvm_module);
        LLVMContextDispose(ctx);

        size_t llvm_ir_size = llvm_ir_string ? strlen(llvm_ir_string) : 0;
        size_t alloc_size = sizeof(struct radv_shader_binary_rtld) + elf_size + llvm_ir_size + 1;
        struct radv_shader_binary_rtld *rbin = calloc(1, alloc_size);
        memcpy(rbin->data,  elf_buffer, elf_size);
        if (llvm_ir_string)
                memcpy(rbin->data + elf_size, llvm_ir_string, llvm_ir_size + 1);

        rbin->base.type = RADV_BINARY_TYPE_RTLD;
        rbin->base.stage = stage;
        rbin->base.total_size = alloc_size;
        rbin->elf_size = elf_size;
        rbin->llvm_ir_size = llvm_ir_size;
        *rbinary = &rbin->base;

        free(llvm_ir_string);
        free(elf_buffer);
}

static void
ac_fill_shader_info(struct radv_shader_variant_info *shader_info, struct nir_shader *nir, const struct radv_nir_compiler_options *options)
{
        switch (nir->info.stage) {
        case MESA_SHADER_COMPUTE:
                for (int i = 0; i < 3; ++i)
                        shader_info->cs.block_size[i] = nir->info.cs.local_size[i];
                break;
        case MESA_SHADER_FRAGMENT:
                shader_info->fs.early_fragment_test = nir->info.fs.early_fragment_tests;
                break;
        case MESA_SHADER_GEOMETRY:
                shader_info->gs.vertices_in = nir->info.gs.vertices_in;
                shader_info->gs.vertices_out = nir->info.gs.vertices_out;
                shader_info->gs.output_prim = nir->info.gs.output_primitive;
                shader_info->gs.invocations = nir->info.gs.invocations;
                break;
        case MESA_SHADER_TESS_EVAL:
                shader_info->tes.primitive_mode = nir->info.tess.primitive_mode;
                shader_info->tes.spacing = nir->info.tess.spacing;
                shader_info->tes.ccw = nir->info.tess.ccw;
                shader_info->tes.point_mode = nir->info.tess.point_mode;
                shader_info->tes.as_es = options->key.vs_common_out.as_es;
                shader_info->tes.export_prim_id = options->key.vs_common_out.export_prim_id;
                shader_info->is_ngg = options->key.vs_common_out.as_ngg;
                break;
        case MESA_SHADER_TESS_CTRL:
                shader_info->tcs.tcs_vertices_out = nir->info.tess.tcs_vertices_out;
                break;
        case MESA_SHADER_VERTEX:
                shader_info->vs.as_es = options->key.vs_common_out.as_es;
                shader_info->vs.as_ls = options->key.vs_common_out.as_ls;
                shader_info->vs.export_prim_id = options->key.vs_common_out.export_prim_id;
                shader_info->is_ngg = options->key.vs_common_out.as_ngg;
                break;
        default:
                break;
        }
}

void
radv_compile_nir_shader(struct ac_llvm_compiler *ac_llvm,
                        struct radv_shader_binary **rbinary,
                        struct radv_shader_variant_info *shader_info,
                        struct nir_shader *const *nir,
                        int nir_count,
                        const struct radv_nir_compiler_options *options)
{

        LLVMModuleRef llvm_module;

        llvm_module = ac_translate_nir_to_llvm(ac_llvm, nir, nir_count, shader_info,
                                               options);

        ac_compile_llvm_module(ac_llvm, llvm_module, rbinary, shader_info,
                               nir[nir_count - 1]->info.stage, options);

        for (int i = 0; i < nir_count; ++i)
                ac_fill_shader_info(shader_info, nir[i], options);

        /* Determine the ES type (VS or TES) for the GS on GFX9. */
        if (options->chip_class >= GFX9) {
                if (nir_count == 2 &&
                    nir[1]->info.stage == MESA_SHADER_GEOMETRY) {
                        shader_info->gs.es_type = nir[0]->info.stage;
                }
        }
}

static void
ac_gs_copy_shader_emit(struct radv_shader_context *ctx)
{
        LLVMValueRef vtx_offset =
                LLVMBuildMul(ctx->ac.builder, ctx->abi.vertex_id,
                             LLVMConstInt(ctx->ac.i32, 4, false), "");
        LLVMValueRef stream_id;

        /* Fetch the vertex stream ID. */
        if (ctx->shader_info->info.so.num_outputs) {
                stream_id =
                        ac_unpack_param(&ctx->ac, ctx->streamout_config, 24, 2);
        } else {
                stream_id = ctx->ac.i32_0;
        }

        LLVMBasicBlockRef end_bb;
        LLVMValueRef switch_inst;

        end_bb = LLVMAppendBasicBlockInContext(ctx->ac.context,
                                               ctx->main_function, "end");
        switch_inst = LLVMBuildSwitch(ctx->ac.builder, stream_id, end_bb, 4);

        for (unsigned stream = 0; stream < 4; stream++) {
                unsigned num_components =
                        ctx->shader_info->info.gs.num_stream_output_components[stream];
                LLVMBasicBlockRef bb;
                unsigned offset;

                if (!num_components)
                        continue;

                if (stream > 0 && !ctx->shader_info->info.so.num_outputs)
                        continue;

                bb = LLVMInsertBasicBlockInContext(ctx->ac.context, end_bb, "out");
                LLVMAddCase(switch_inst, LLVMConstInt(ctx->ac.i32, stream, 0), bb);
                LLVMPositionBuilderAtEnd(ctx->ac.builder, bb);

                offset = 0;
                for (unsigned i = 0; i < AC_LLVM_MAX_OUTPUTS; ++i) {
                        unsigned output_usage_mask =
                                ctx->shader_info->info.gs.output_usage_mask[i];
                        unsigned output_stream =
                                ctx->shader_info->info.gs.output_streams[i];
                        int length = util_last_bit(output_usage_mask);

                        if (!(ctx->output_mask & (1ull << i)) ||
                            output_stream != stream)
                                continue;

                        for (unsigned j = 0; j < length; j++) {
                                LLVMValueRef value, soffset;

                                if (!(output_usage_mask & (1 << j)))
                                        continue;

                                soffset = LLVMConstInt(ctx->ac.i32,
                                                       offset *
                                                       ctx->gs_max_out_vertices * 16 * 4, false);

                                offset++;

                                value = ac_build_buffer_load(&ctx->ac,
                                                             ctx->gsvs_ring[0],
                                                             1, ctx->ac.i32_0,
                                                             vtx_offset, soffset,
                                                             0, ac_glc | ac_slc, true, false);

                                LLVMTypeRef type = LLVMGetAllocatedType(ctx->abi.outputs[ac_llvm_reg_index_soa(i, j)]);
                                if (ac_get_type_size(type) == 2) {
                                        value = LLVMBuildBitCast(ctx->ac.builder, value, ctx->ac.i32, "");
                                        value = LLVMBuildTrunc(ctx->ac.builder, value, ctx->ac.i16, "");
                                }

                                LLVMBuildStore(ctx->ac.builder,
                                               ac_to_float(&ctx->ac, value), ctx->abi.outputs[ac_llvm_reg_index_soa(i, j)]);
                        }
                }

                if (ctx->shader_info->info.so.num_outputs)
                        radv_emit_streamout(ctx, stream);

                if (stream == 0) {
                        handle_vs_outputs_post(ctx, false, true,
                                               &ctx->shader_info->vs.outinfo);
                }

                LLVMBuildBr(ctx->ac.builder, end_bb);
        }

        LLVMPositionBuilderAtEnd(ctx->ac.builder, end_bb);
}

void
radv_compile_gs_copy_shader(struct ac_llvm_compiler *ac_llvm,
                            struct nir_shader *geom_shader,
                            struct radv_shader_binary **rbinary,
                            struct radv_shader_variant_info *shader_info,
                            const struct radv_nir_compiler_options *options)
{
        struct radv_shader_context ctx = {0};
        ctx.options = options;
        ctx.shader_info = shader_info;

        ac_llvm_context_init(&ctx.ac, options->chip_class, options->family);
        ctx.context = ctx.ac.context;
        ctx.ac.module = ac_create_module(ac_llvm->tm, ctx.context);

        ctx.is_gs_copy_shader = true;

        enum ac_float_mode float_mode =
                options->unsafe_math ? AC_FLOAT_MODE_UNSAFE_FP_MATH :
                                       AC_FLOAT_MODE_DEFAULT;

        ctx.ac.builder = ac_create_builder(ctx.context, float_mode);
        ctx.stage = MESA_SHADER_VERTEX;

        radv_nir_shader_info_pass(geom_shader, options, &shader_info->info);

        create_function(&ctx, MESA_SHADER_VERTEX, false, MESA_SHADER_VERTEX);

        ctx.gs_max_out_vertices = geom_shader->info.gs.vertices_out;
        ac_setup_rings(&ctx);

        nir_foreach_variable(variable, &geom_shader->outputs) {
                scan_shader_output_decl(&ctx, variable, geom_shader, MESA_SHADER_VERTEX);
                ac_handle_shader_output_decl(&ctx.ac, &ctx.abi, geom_shader,
                                             variable, MESA_SHADER_VERTEX);
        }

        ac_gs_copy_shader_emit(&ctx);

        LLVMBuildRetVoid(ctx.ac.builder);

        ac_llvm_finalize_module(&ctx, ac_llvm->passmgr, options);

        ac_compile_llvm_module(ac_llvm, ctx.ac.module, rbinary, shader_info,
                               MESA_SHADER_VERTEX, options);
        (*rbinary)->is_gs_copy_shader = true;
        
}