/* * Copyright 2018 Collabora Ltd. * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * on the rights to use, copy, modify, merge, publish, distribute, sub * license, and/or sell copies of the Software, and to permit persons to whom * the Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM, * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE * USE OR OTHER DEALINGS IN THE SOFTWARE. */ #include "zink_context.h" #include "zink_compiler.h" #include "zink_program.h" #include "zink_screen.h" #include "nir_to_spirv/nir_to_spirv.h" #include "pipe/p_state.h" #include "nir.h" #include "compiler/nir/nir_builder.h" #include "nir/tgsi_to_nir.h" #include "tgsi/tgsi_dump.h" #include "tgsi/tgsi_from_mesa.h" #include "util/u_memory.h" static bool lower_discard_if_instr(nir_intrinsic_instr *instr, nir_builder *b) { if (instr->intrinsic == nir_intrinsic_discard_if) { b->cursor = nir_before_instr(&instr->instr); nir_if *if_stmt = nir_push_if(b, nir_ssa_for_src(b, instr->src[0], 1)); nir_intrinsic_instr *discard = nir_intrinsic_instr_create(b->shader, nir_intrinsic_discard); nir_builder_instr_insert(b, &discard->instr); nir_pop_if(b, if_stmt); nir_instr_remove(&instr->instr); return true; } /* a shader like this (shaders@glsl-fs-discard-04): uniform int j, k; void main() { for (int i = 0; i < j; i++) { if (i > k) continue; discard; } gl_FragColor = vec4(0.0, 1.0, 0.0, 0.0); } will generate nir like: loop { //snip if ssa_11 { block block_5: / preds: block_4 / vec1 32 ssa_17 = iadd ssa_50, ssa_31 / succs: block_7 / } else { block block_6: / preds: block_4 / intrinsic discard () () <-- not last instruction vec1 32 ssa_23 = iadd ssa_50, ssa_31 <-- dead code loop itr increment / succs: block_7 / } //snip } which means that we can't assert like this: assert(instr->intrinsic != nir_intrinsic_discard || nir_block_last_instr(instr->instr.block) == &instr->instr); and it's unnecessary anyway since post-vtn optimizing will dce the instructions following the discard */ return false; } static bool lower_discard_if(nir_shader *shader) { bool progress = false; nir_foreach_function(function, shader) { if (function->impl) { nir_builder builder; nir_builder_init(&builder, function->impl); nir_foreach_block(block, function->impl) { nir_foreach_instr_safe(instr, block) { if (instr->type == nir_instr_type_intrinsic) progress |= lower_discard_if_instr( nir_instr_as_intrinsic(instr), &builder); } } nir_metadata_preserve(function->impl, nir_metadata_dominance); } } return progress; } static const struct nir_shader_compiler_options nir_options = { .lower_all_io_to_temps = true, .lower_ffma16 = true, .lower_ffma32 = true, .lower_ffma64 = true, .lower_fdph = true, .lower_flrp32 = true, .lower_fpow = true, .lower_fsat = true, .lower_extract_byte = true, .lower_extract_word = true, .lower_mul_high = true, .lower_rotate = true, .lower_uadd_carry = true, }; const void * zink_get_compiler_options(struct pipe_screen *screen, enum pipe_shader_ir ir, enum pipe_shader_type shader) { assert(ir == PIPE_SHADER_IR_NIR); return &nir_options; } struct nir_shader * zink_tgsi_to_nir(struct pipe_screen *screen, const struct tgsi_token *tokens) { if (zink_debug & ZINK_DEBUG_TGSI) { fprintf(stderr, "TGSI shader:\n---8<---\n"); tgsi_dump_to_file(tokens, 0, stderr); fprintf(stderr, "---8<---\n\n"); } return tgsi_to_nir(tokens, screen, false); } static void optimize_nir(struct nir_shader *s) { bool progress; do { progress = false; NIR_PASS_V(s, nir_lower_vars_to_ssa); NIR_PASS(progress, s, nir_copy_prop); NIR_PASS(progress, s, nir_opt_remove_phis); NIR_PASS(progress, s, nir_opt_dce); NIR_PASS(progress, s, nir_opt_dead_cf); NIR_PASS(progress, s, nir_opt_cse); NIR_PASS(progress, s, nir_opt_peephole_select, 8, true, true); NIR_PASS(progress, s, nir_opt_algebraic); NIR_PASS(progress, s, nir_opt_constant_folding); NIR_PASS(progress, s, nir_opt_undef); NIR_PASS(progress, s, zink_nir_lower_b2b); } while (progress); } /* check for a genuine gl_PointSize output vs one from nir_lower_point_size_mov */ static bool check_psiz(struct nir_shader *s) { nir_foreach_shader_out_variable(var, s) { if (var->data.location == VARYING_SLOT_PSIZ) { /* genuine PSIZ outputs will have this set */ return !!var->data.explicit_location; } } return false; } /* semi-copied from iris */ static void update_so_info(struct zink_shader *sh, uint64_t outputs_written, bool have_psiz) { uint8_t reverse_map[64] = {}; unsigned slot = 0; while (outputs_written) { int bit = u_bit_scan64(&outputs_written); /* PSIZ from nir_lower_point_size_mov breaks stream output, so always skip it */ if (bit == VARYING_SLOT_PSIZ && !have_psiz) continue; reverse_map[slot++] = bit; } for (unsigned i = 0; i < sh->streamout.so_info.num_outputs; i++) { struct pipe_stream_output *output = &sh->streamout.so_info.output[i]; /* Map Gallium's condensed "slots" back to real VARYING_SLOT_* enums */ sh->streamout.so_info_slots[i] = reverse_map[output->register_index]; } } VkShaderModule zink_shader_compile(struct zink_screen *screen, struct zink_shader *zs) { VkShaderModule mod = VK_NULL_HANDLE; void *streamout = zs->streamout.so_info_slots ? &zs->streamout : NULL; struct spirv_shader *spirv = nir_to_spirv(zs->nir, streamout); assert(spirv); if (zink_debug & ZINK_DEBUG_SPIRV) { char buf[256]; static int i; snprintf(buf, sizeof(buf), "dump%02d.spv", i++); FILE *fp = fopen(buf, "wb"); if (fp) { fwrite(spirv->words, sizeof(uint32_t), spirv->num_words, fp); fclose(fp); fprintf(stderr, "wrote '%s'...\n", buf); } } VkShaderModuleCreateInfo smci = {}; smci.sType = VK_STRUCTURE_TYPE_SHADER_MODULE_CREATE_INFO; smci.codeSize = spirv->num_words * sizeof(uint32_t); smci.pCode = spirv->words; if (vkCreateShaderModule(screen->dev, &smci, NULL, &mod) != VK_SUCCESS) mod = VK_NULL_HANDLE; /* TODO: determine if there's any reason to cache spirv output? */ free(spirv->words); free(spirv); return mod; } struct zink_shader * zink_shader_create(struct zink_screen *screen, struct nir_shader *nir, const struct pipe_stream_output_info *so_info) { struct zink_shader *ret = CALLOC_STRUCT(zink_shader); bool have_psiz = false; ret->programs = _mesa_pointer_set_create(NULL); NIR_PASS_V(nir, nir_lower_uniforms_to_ubo, 1); NIR_PASS_V(nir, nir_lower_clip_halfz); if (nir->info.stage == MESA_SHADER_VERTEX) have_psiz = check_psiz(nir); NIR_PASS_V(nir, nir_lower_regs_to_ssa); optimize_nir(nir); NIR_PASS_V(nir, nir_remove_dead_variables, nir_var_function_temp, NULL); NIR_PASS_V(nir, lower_discard_if); NIR_PASS_V(nir, nir_lower_fragcolor); NIR_PASS_V(nir, nir_convert_from_ssa, true); if (zink_debug & ZINK_DEBUG_NIR) { fprintf(stderr, "NIR shader:\n---8<---\n"); nir_print_shader(nir, stderr); fprintf(stderr, "---8<---\n"); } ret->num_bindings = 0; nir_foreach_variable_with_modes(var, nir, nir_var_uniform | nir_var_mem_ubo) { if (var->data.mode == nir_var_mem_ubo) { int binding = zink_binding(nir->info.stage, VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER, var->data.binding); ret->bindings[ret->num_bindings].index = var->data.binding; ret->bindings[ret->num_bindings].binding = binding; ret->bindings[ret->num_bindings].type = VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER; ret->num_bindings++; } else { assert(var->data.mode == nir_var_uniform); if (glsl_type_is_array(var->type) && glsl_type_is_sampler(glsl_get_array_element(var->type))) { for (int i = 0; i < glsl_get_length(var->type); ++i) { int binding = zink_binding(nir->info.stage, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, var->data.binding + i); ret->bindings[ret->num_bindings].index = var->data.binding + i; ret->bindings[ret->num_bindings].binding = binding; ret->bindings[ret->num_bindings].type = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER; ret->num_bindings++; } } else if (glsl_type_is_sampler(var->type)) { int binding = zink_binding(nir->info.stage, VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER, var->data.binding); ret->bindings[ret->num_bindings].index = var->data.binding; ret->bindings[ret->num_bindings].binding = binding; ret->bindings[ret->num_bindings].type = VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER; ret->num_bindings++; } } } ret->nir = nir; if (so_info) { memcpy(&ret->streamout.so_info, so_info, sizeof(struct pipe_stream_output_info)); ret->streamout.so_info_slots = malloc(so_info->num_outputs * sizeof(unsigned int)); assert(ret->streamout.so_info_slots); update_so_info(ret, nir->info.outputs_written, have_psiz); } return ret; } void zink_shader_free(struct zink_context *ctx, struct zink_shader *shader) { struct zink_screen *screen = zink_screen(ctx->base.screen); set_foreach(shader->programs, entry) { struct zink_gfx_program *prog = (void*)entry->key; _mesa_hash_table_remove_key(ctx->program_cache, prog->shaders); prog->shaders[pipe_shader_type_from_mesa(shader->nir->info.stage)] = NULL; zink_gfx_program_reference(screen, &prog, NULL); } _mesa_set_destroy(shader->programs, NULL); free(shader->streamout.so_info_slots); ralloc_free(shader->nir); FREE(shader); }