src/gallium/drivers/zink/zink_compiler.c

   1 /*
   2  * Copyright 2018 Collabora Ltd.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * on the rights to use, copy, modify, merge, publish, distribute, sub
   8  * license, and/or sell copies of the Software, and to permit persons to whom
   9  * the Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  18  * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  19  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  20  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  21  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  22  */
  23
  24 #include "zink_compiler.h"
  25 #include "zink_screen.h"
  26 #include "nir_to_spirv/nir_to_spirv.h"
  27
  28 #include "pipe/p_state.h"
  29
  30 #include "nir.h"
  31 #include "compiler/nir/nir_builder.h"
  32
  33 #include "nir/tgsi_to_nir.h"
  34 #include "tgsi/tgsi_dump.h"
  35 #include "tgsi/tgsi_from_mesa.h"
  36
  37 #include "util/u_memory.h"
  38
  39 static bool
  40 lower_discard_if_instr(nir_intrinsic_instr *instr, nir_builder *b)
  41 {
  42    if (instr->intrinsic == nir_intrinsic_discard_if) {
  43       b->cursor = nir_before_instr(&instr->instr);
  44
  45       nir_if *if_stmt = nir_push_if(b, nir_ssa_for_src(b, instr->src[0], 1));
  46       nir_intrinsic_instr *discard =
  47          nir_intrinsic_instr_create(b->shader, nir_intrinsic_discard);
  48       nir_builder_instr_insert(b, &discard->instr);
  49       nir_pop_if(b, if_stmt);
  50       nir_instr_remove(&instr->instr);
  51       return true;
  52    }
  53    assert(instr->intrinsic != nir_intrinsic_discard ||
  54           nir_block_last_instr(instr->instr.block) == &instr->instr);
  55
  56    return false;
  57 }
  58
  59 static bool
  60 lower_discard_if(nir_shader *shader)
  61 {
  62    bool progress = false;
  63
  64    nir_foreach_function(function, shader) {
  65       if (function->impl) {
  66          nir_builder builder;
  67          nir_builder_init(&builder, function->impl);
  68          nir_foreach_block(block, function->impl) {
  69             nir_foreach_instr_safe(instr, block) {
  70                if (instr->type == nir_instr_type_intrinsic)
  71                   progress |= lower_discard_if_instr(
  72                                                   nir_instr_as_intrinsic(instr),
  73                                                   &builder);
  74             }
  75          }
  76
  77          nir_metadata_preserve(function->impl, nir_metadata_dominance);
  78       }
  79    }
  80
  81    return progress;
  82 }
  83
  84 static const struct nir_shader_compiler_options nir_options = {
  85    .lower_all_io_to_temps = true,
  86    .lower_ffma = true,
  87    .lower_fdph = true,
  88    .lower_flrp32 = true,
  89    .lower_fpow = true,
  90    .lower_fsat = true,
  91 };
  92
  93 const void *
  94 zink_get_compiler_options(struct pipe_screen *screen,
  95                           enum pipe_shader_ir ir,
  96                           enum pipe_shader_type shader)
  97 {
  98    assert(ir == PIPE_SHADER_IR_NIR);
  99    return &nir_options;
 100 }
 101
 102 struct nir_shader *
 103 zink_tgsi_to_nir(struct pipe_screen *screen, const struct tgsi_token *tokens)
 104 {
 105    if (zink_debug & ZINK_DEBUG_TGSI) {
 106       fprintf(stderr, "TGSI shader:\n---8<---\n");
 107       tgsi_dump_to_file(tokens, 0, stderr);
 108       fprintf(stderr, "---8<---\n\n");
 109    }
 110
 111    return tgsi_to_nir(tokens, screen, false);
 112 }
 113
 114 static void
 115 optimize_nir(struct nir_shader *s)
 116 {
 117    bool progress;
 118    do {
 119       progress = false;
 120       NIR_PASS_V(s, nir_lower_vars_to_ssa);
 121       NIR_PASS(progress, s, nir_copy_prop);
 122       NIR_PASS(progress, s, nir_opt_remove_phis);
 123       NIR_PASS(progress, s, nir_opt_dce);
 124       NIR_PASS(progress, s, nir_opt_dead_cf);
 125       NIR_PASS(progress, s, nir_opt_cse);
 126       NIR_PASS(progress, s, nir_opt_peephole_select, 8, true, true);
 127       NIR_PASS(progress, s, nir_opt_algebraic);
 128       NIR_PASS(progress, s, nir_opt_constant_folding);
 129       NIR_PASS(progress, s, nir_opt_undef);
 130       NIR_PASS(progress, s, zink_nir_lower_b2b);
 131    } while (progress);
 132 }
 133
 134 struct zink_shader *
 135 zink_compile_nir(struct zink_screen *screen, struct nir_shader *nir)
 136 {
 137    struct zink_shader *ret = CALLOC_STRUCT(zink_shader);
 138
 139    NIR_PASS_V(nir, nir_lower_uniforms_to_ubo, 1);
 140    NIR_PASS_V(nir, nir_lower_clip_halfz);
 141    NIR_PASS_V(nir, nir_lower_regs_to_ssa);
 142    optimize_nir(nir);
 143    NIR_PASS_V(nir, nir_remove_dead_variables, nir_var_function_temp);
 144    NIR_PASS_V(nir, lower_discard_if);
 145    NIR_PASS_V(nir, nir_convert_from_ssa, true);
 146
 147    if (zink_debug & ZINK_DEBUG_NIR) {
 148       fprintf(stderr, "NIR shader:\n---8<---\n");
 149       nir_print_shader(nir, stderr);
 150       fprintf(stderr, "---8<---\n");
 151    }
 152
 153    ret->num_bindings = 0;
 154    nir_foreach_variable(var, &nir->uniforms) {
 155       if (var->data.mode == nir_var_mem_ubo) {
 156          int binding = zink_binding(nir->info.stage,
 157                                     VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
 158                                     var->data.binding);
 159          ret->bindings[ret->num_bindings].index = var->data.binding;
 160          ret->bindings[ret->num_bindings].binding = binding;
 161          ret->bindings[ret->num_bindings].type = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER;
 162          ret->num_bindings++;
 163       } else {
 164          assert(var->data.mode == nir_var_uniform);
 165          if (glsl_type_is_array(var->type) &&
 166              glsl_type_is_sampler(glsl_get_array_element(var->type))) {
 167             for (int i = 0; i < glsl_get_length(var->type); ++i) {
 168                int binding = zink_binding(nir->info.stage,
 169                                           VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
 170                                           var->data.binding + i);
 171                ret->bindings[ret->num_bindings].index = var->data.binding + i;
 172                ret->bindings[ret->num_bindings].binding = binding;
 173                ret->bindings[ret->num_bindings].type = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
 174                ret->num_bindings++;
 175             }
 176          } else if (glsl_type_is_sampler(var->type)) {
 177             int binding = zink_binding(nir->info.stage,
 178                                        VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
 179                                        var->data.binding);
 180             ret->bindings[ret->num_bindings].index = var->data.binding;
 181             ret->bindings[ret->num_bindings].binding = binding;
 182             ret->bindings[ret->num_bindings].type = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER;
 183             ret->num_bindings++;
 184          }
 185       }
 186    }
 187
 188    ret->info = nir->info;
 189
 190    struct spirv_shader *spirv = nir_to_spirv(nir);
 191    assert(spirv);
 192
 193    if (zink_debug & ZINK_DEBUG_SPIRV) {
 194       char buf[256];
 195       static int i;
 196       snprintf(buf, sizeof(buf), "dump%02d.spv", i++);
 197       FILE *fp = fopen(buf, "wb");
 198       fwrite(spirv->words, sizeof(uint32_t), spirv->num_words, fp);
 199       fclose(fp);
 200       fprintf(stderr, "wrote '%s'...\n", buf);
 201    }
 202
 203    VkShaderModuleCreateInfo smci = {};
 204    smci.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO;
 205    smci.codeSize = spirv->num_words * sizeof(uint32_t);
 206    smci.pCode = spirv->words;
 207
 208    if (vkCreateShaderModule(screen->dev, &smci, NULL, &ret->shader_module) != VK_SUCCESS)
 209       return NULL;
 210
 211    return ret;
 212 }
 213
 214 void
 215 zink_shader_free(struct zink_screen *screen, struct zink_shader *shader)
 216 {
 217    vkDestroyShaderModule(screen->dev, shader->shader_module, NULL);
 218    FREE(shader);
 219 }