/* * Copyright © 2015 Red Hat * * 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 "st_nir.h" #include "pipe/p_defines.h" #include "pipe/p_screen.h" #include "pipe/p_context.h" #include "program/program.h" #include "program/prog_statevars.h" #include "program/prog_parameter.h" #include "main/context.h" #include "main/mtypes.h" #include "main/errors.h" #include "main/glspirv.h" #include "main/shaderapi.h" #include "main/uniforms.h" #include "main/shaderobj.h" #include "st_context.h" #include "st_program.h" #include "st_shader_cache.h" #include "compiler/nir/nir.h" #include "compiler/nir/nir_builder.h" #include "compiler/glsl_types.h" #include "compiler/glsl/glsl_to_nir.h" #include "compiler/glsl/gl_nir.h" #include "compiler/glsl/gl_nir_linker.h" #include "compiler/glsl/ir.h" #include "compiler/glsl/ir_optimization.h" #include "compiler/glsl/linker_util.h" #include "compiler/glsl/program.h" #include "compiler/glsl/shader_cache.h" #include "compiler/glsl/string_to_uint_map.h" #include "util/log.h" static int type_size(const struct glsl_type *type) { return glsl_count_attribute_slots(type, false); } /* Depending on PIPE_CAP_TGSI_TEXCOORD (st->needs_texcoord_semantic) we * may need to fix up varying slots so the glsl->nir path is aligned * with the anything->tgsi->nir path. */ static void st_nir_fixup_varying_slots(struct st_context *st, nir_shader *shader, nir_variable_mode mode) { if (st->needs_texcoord_semantic) return; /* This is called from finalize, but we don't want to do this adjustment twice. */ assert(!st->allow_st_finalize_nir_twice); nir_foreach_variable_with_modes(var, shader, mode) { if (var->data.location >= VARYING_SLOT_VAR0 && var->data.location < VARYING_SLOT_PATCH0) { var->data.location += 9; } else if (var->data.location == VARYING_SLOT_PNTC) { var->data.location = VARYING_SLOT_VAR8; } else if ((var->data.location >= VARYING_SLOT_TEX0) && (var->data.location <= VARYING_SLOT_TEX7)) { var->data.location += VARYING_SLOT_VAR0 - VARYING_SLOT_TEX0; } } } /* input location assignment for VS inputs must be handled specially, so * that it is aligned w/ st's vbo state. * (This isn't the case with, for ex, FS inputs, which only need to agree * on varying-slot w/ the VS outputs) */ void st_nir_assign_vs_in_locations(struct nir_shader *nir) { if (nir->info.stage != MESA_SHADER_VERTEX || nir->info.io_lowered) return; nir->num_inputs = util_bitcount64(nir->info.inputs_read); bool removed_inputs = false; nir_foreach_shader_in_variable_safe(var, nir) { /* NIR already assigns dual-slot inputs to two locations so all we have * to do is compact everything down. */ if (nir->info.inputs_read & BITFIELD64_BIT(var->data.location)) { var->data.driver_location = util_bitcount64(nir->info.inputs_read & BITFIELD64_MASK(var->data.location)); } else { /* Convert unused input variables to shader_temp (with no * initialization), to avoid confusing drivers looking through the * inputs array and expecting to find inputs with a driver_location * set. */ var->data.mode = nir_var_shader_temp; removed_inputs = true; } } /* Re-lower global vars, to deal with any dead VS inputs. */ if (removed_inputs) NIR_PASS(_, nir, nir_lower_global_vars_to_local); } static int st_nir_lookup_parameter_index(struct gl_program *prog, nir_variable *var) { struct gl_program_parameter_list *params = prog->Parameters; /* Lookup the first parameter that the uniform storage that match the * variable location. */ for (unsigned i = 0; i < params->NumParameters; i++) { int index = params->Parameters[i].MainUniformStorageIndex; if (index == var->data.location) return i; } /* TODO: Handle this fallback for SPIR-V. We need this for GLSL e.g. in * dEQP-GLES2.functional.uniform_api.random.3 */ /* is there a better way to do this? If we have something like: * * struct S { * float f; * vec4 v; * }; * uniform S color; * * Then what we get in prog->Parameters looks like: * * 0: Name=color.f, Type=6, DataType=1406, Size=1 * 1: Name=color.v, Type=6, DataType=8b52, Size=4 * * So the name doesn't match up and _mesa_lookup_parameter_index() * fails. In this case just find the first matching "color.*".. * * Note for arrays you could end up w/ color[n].f, for example. */ if (!prog->sh.data->spirv) { int namelen = strlen(var->name); for (unsigned i = 0; i < params->NumParameters; i++) { struct gl_program_parameter *p = ¶ms->Parameters[i]; if ((strncmp(p->Name, var->name, namelen) == 0) && ((p->Name[namelen] == '.') || (p->Name[namelen] == '['))) { return i; } } } return -1; } static void st_nir_assign_uniform_locations(struct gl_context *ctx, struct gl_program *prog, nir_shader *nir) { int shaderidx = 0; int imageidx = 0; nir_foreach_variable_with_modes(uniform, nir, nir_var_uniform | nir_var_image) { int loc; const struct glsl_type *type = glsl_without_array(uniform->type); if (!uniform->data.bindless && (glsl_type_is_sampler(type) || glsl_type_is_image(type))) { if (glsl_type_is_sampler(type)) { loc = shaderidx; shaderidx += type_size(uniform->type); } else { loc = imageidx; imageidx += type_size(uniform->type); } } else if (uniform->state_slots) { const gl_state_index16 *const stateTokens = uniform->state_slots[0].tokens; unsigned comps; if (glsl_type_is_struct_or_ifc(type)) { comps = 4; } else { comps = glsl_get_vector_elements(type); } if (ctx->Const.PackedDriverUniformStorage) { loc = _mesa_add_sized_state_reference(prog->Parameters, stateTokens, comps, false); loc = prog->Parameters->Parameters[loc].ValueOffset; } else { loc = _mesa_add_state_reference(prog->Parameters, stateTokens); } } else { loc = st_nir_lookup_parameter_index(prog, uniform); /* We need to check that loc is not -1 here before accessing the * array. It can be negative for example when we have a struct that * only contains opaque types. */ if (loc >= 0 && ctx->Const.PackedDriverUniformStorage) { loc = prog->Parameters->Parameters[loc].ValueOffset; } } uniform->data.driver_location = loc; } } static bool def_is_64bit(nir_def *def, void *state) { bool *lower = (bool *)state; if (def && (def->bit_size == 64)) { *lower = true; return false; } return true; } static bool src_is_64bit(nir_src *src, void *state) { bool *lower = (bool *)state; if (src && (nir_src_bit_size(*src) == 64)) { *lower = true; return false; } return true; } static bool filter_64_bit_instr(const nir_instr *const_instr, UNUSED const void *data) { bool lower = false; /* lower_alu_to_scalar required nir_instr to be const, but nir_foreach_* * doesn't have const variants, so do the ugly const_cast here. */ nir_instr *instr = const_cast(const_instr); nir_foreach_def(instr, def_is_64bit, &lower); if (lower) return true; nir_foreach_src(instr, src_is_64bit, &lower); return lower; } /* Second third of converting glsl_to_nir. This creates uniforms, gathers * info on varyings, etc after NIR link time opts have been applied. */ static char * st_glsl_to_nir_post_opts(struct st_context *st, struct gl_program *prog, struct gl_shader_program *shader_program) { nir_shader *nir = prog->nir; struct pipe_screen *screen = st->screen; /* Make a pass over the IR to add state references for any built-in * uniforms that are used. This has to be done now (during linking). * Code generation doesn't happen until the first time this shader is * used for rendering. Waiting until then to generate the parameters is * too late. At that point, the values for the built-in uniforms won't * get sent to the shader. */ nir_foreach_uniform_variable(var, nir) { const nir_state_slot *const slots = var->state_slots; if (slots != NULL) { const struct glsl_type *type = glsl_without_array(var->type); for (unsigned int i = 0; i < var->num_state_slots; i++) { unsigned comps; if (glsl_type_is_struct_or_ifc(type)) { comps = _mesa_program_state_value_size(slots[i].tokens); } else { comps = glsl_get_vector_elements(type); } if (st->ctx->Const.PackedDriverUniformStorage) { _mesa_add_sized_state_reference(prog->Parameters, slots[i].tokens, comps, false); } else { _mesa_add_state_reference(prog->Parameters, slots[i].tokens); } } } } /* Avoid reallocation of the program parameter list, because the uniform * storage is only associated with the original parameter list. * This should be enough for Bitmap and DrawPixels constants. */ _mesa_ensure_and_associate_uniform_storage(st->ctx, shader_program, prog, 28); /* None of the builtins being lowered here can be produced by SPIR-V. See * _mesa_builtin_uniform_desc. Also drivers that support packed uniform * storage don't need to lower builtins. */ if (!shader_program->data->spirv && !st->ctx->Const.PackedDriverUniformStorage) NIR_PASS(_, nir, st_nir_lower_builtin); if (!screen->get_param(screen, PIPE_CAP_NIR_ATOMICS_AS_DEREF)) NIR_PASS(_, nir, gl_nir_lower_atomics, shader_program, true); NIR_PASS(_, nir, nir_opt_intrinsics); NIR_PASS(_, nir, nir_opt_fragdepth); /* Lower 64-bit ops. */ if (nir->options->lower_int64_options || nir->options->lower_doubles_options) { bool lowered_64bit_ops = false; bool revectorize = false; if (nir->options->lower_doubles_options) { /* nir_lower_doubles is not prepared for vector ops, so if the backend doesn't * request lower_alu_to_scalar until now, lower all 64 bit ops, and try to * vectorize them afterwards again */ if (!nir->options->lower_to_scalar) { NIR_PASS(revectorize, nir, nir_lower_alu_to_scalar, filter_64_bit_instr, nullptr); NIR_PASS(revectorize, nir, nir_lower_phis_to_scalar, false); } /* doubles lowering requires frexp to be lowered first if it will be, * since the pass generates other 64-bit ops. Most backends lower * frexp, and using doubles is rare, and using frexp is even more rare * (no instances in shader-db), so we're not too worried about * accidentally lowering a 32-bit frexp here. */ NIR_PASS(lowered_64bit_ops, nir, nir_lower_frexp); NIR_PASS(lowered_64bit_ops, nir, nir_lower_doubles, st->ctx->SoftFP64, nir->options->lower_doubles_options); } if (nir->options->lower_int64_options) NIR_PASS(lowered_64bit_ops, nir, nir_lower_int64); if (revectorize && !nir->options->vectorize_vec2_16bit) NIR_PASS(_, nir, nir_opt_vectorize, nullptr, nullptr); if (revectorize || lowered_64bit_ops) gl_nir_opts(nir); } nir_variable_mode mask = nir_var_shader_in | nir_var_shader_out | nir_var_function_temp; nir_remove_dead_variables(nir, mask, NULL); if (!st->has_hw_atomics && !screen->get_param(screen, PIPE_CAP_NIR_ATOMICS_AS_DEREF)) { unsigned align_offset_state = 0; if (st->ctx->Const.ShaderStorageBufferOffsetAlignment > 4) { struct gl_program_parameter_list *params = prog->Parameters; for (unsigned i = 0; i < shader_program->data->NumAtomicBuffers; i++) { gl_state_index16 state[STATE_LENGTH] = { STATE_ATOMIC_COUNTER_OFFSET, (short)shader_program->data->AtomicBuffers[i].Binding }; _mesa_add_state_reference(params, state); } align_offset_state = STATE_ATOMIC_COUNTER_OFFSET; } NIR_PASS(_, nir, nir_lower_atomics_to_ssbo, align_offset_state); } st_set_prog_affected_state_flags(prog); st_finalize_nir_before_variants(nir); char *msg = NULL; if (st->allow_st_finalize_nir_twice) { st_serialize_base_nir(prog, nir); msg = st_finalize_nir(st, prog, shader_program, nir, true, true, false); } if (st->ctx->_Shader->Flags & GLSL_DUMP) { _mesa_log("\n"); _mesa_log("NIR IR for linked %s program %d:\n", _mesa_shader_stage_to_string(prog->info.stage), shader_program->Name); nir_print_shader(nir, mesa_log_get_file()); _mesa_log("\n\n"); } return msg; } static void st_nir_vectorize_io(nir_shader *producer, nir_shader *consumer) { if (consumer) NIR_PASS(_, consumer, nir_lower_io_to_vector, nir_var_shader_in); if (!producer) return; NIR_PASS(_, producer, nir_lower_io_to_vector, nir_var_shader_out); if (producer->info.stage == MESA_SHADER_TESS_CTRL && producer->options->vectorize_tess_levels) NIR_PASS(_, producer, nir_vectorize_tess_levels); NIR_PASS(_, producer, nir_opt_combine_stores, nir_var_shader_out); if ((producer)->info.stage != MESA_SHADER_TESS_CTRL) { /* Calling lower_io_to_vector creates output variable writes with * write-masks. We only support these for TCS outputs, so for other * stages, we need to call nir_lower_io_to_temporaries to get rid of * them. This, in turn, creates temporary variables and extra * copy_deref intrinsics that we need to clean up. */ NIR_PASS(_, producer, nir_lower_io_to_temporaries, nir_shader_get_entrypoint(producer), true, false); NIR_PASS(_, producer, nir_lower_global_vars_to_local); NIR_PASS(_, producer, nir_split_var_copies); NIR_PASS(_, producer, nir_lower_var_copies); } /* Undef scalar store_deref intrinsics are not ignored by nir_lower_io, * so they must be removed before that. These passes remove them. */ NIR_PASS(_, producer, nir_lower_vars_to_ssa); NIR_PASS(_, producer, nir_opt_undef); NIR_PASS(_, producer, nir_opt_dce); } extern "C" { bool st_nir_lower_wpos_ytransform(struct nir_shader *nir, struct gl_program *prog, struct pipe_screen *pscreen) { bool progress = false; if (nir->info.stage != MESA_SHADER_FRAGMENT) { nir_shader_preserve_all_metadata(nir); return progress; } static const gl_state_index16 wposTransformState[STATE_LENGTH] = { STATE_FB_WPOS_Y_TRANSFORM }; nir_lower_wpos_ytransform_options wpos_options = { { 0 } }; memcpy(wpos_options.state_tokens, wposTransformState, sizeof(wpos_options.state_tokens)); wpos_options.fs_coord_origin_upper_left = pscreen->get_param(pscreen, PIPE_CAP_FS_COORD_ORIGIN_UPPER_LEFT); wpos_options.fs_coord_origin_lower_left = pscreen->get_param(pscreen, PIPE_CAP_FS_COORD_ORIGIN_LOWER_LEFT); wpos_options.fs_coord_pixel_center_integer = pscreen->get_param(pscreen, PIPE_CAP_FS_COORD_PIXEL_CENTER_INTEGER); wpos_options.fs_coord_pixel_center_half_integer = pscreen->get_param(pscreen, PIPE_CAP_FS_COORD_PIXEL_CENTER_HALF_INTEGER); if (nir_lower_wpos_ytransform(nir, &wpos_options)) { _mesa_add_state_reference(prog->Parameters, wposTransformState); progress = true; } static const gl_state_index16 pntcTransformState[STATE_LENGTH] = { STATE_FB_PNTC_Y_TRANSFORM }; if (nir_lower_pntc_ytransform(nir, &pntcTransformState)) { _mesa_add_state_reference(prog->Parameters, pntcTransformState); progress = true; } return progress; } static bool st_link_glsl_to_nir(struct gl_context *ctx, struct gl_shader_program *shader_program) { struct st_context *st = st_context(ctx); struct gl_linked_shader *linked_shader[MESA_SHADER_STAGES]; unsigned num_shaders = 0; /* Return early if we are loading the shader from on-disk cache */ if (st_load_nir_from_disk_cache(ctx, shader_program)) { return GL_TRUE; } MESA_TRACE_FUNC(); assert(shader_program->data->LinkStatus); for (unsigned i = 0; i < MESA_SHADER_STAGES; i++) { if (shader_program->_LinkedShaders[i]) linked_shader[num_shaders++] = shader_program->_LinkedShaders[i]; } for (unsigned i = 0; i < num_shaders; i++) { struct gl_linked_shader *shader = linked_shader[i]; const nir_shader_compiler_options *options = st->ctx->Const.ShaderCompilerOptions[shader->Stage].NirOptions; struct gl_program *prog = shader->Program; shader->Program->info.separate_shader = shader_program->SeparateShader; assert(!prog->nir); prog->shader_program = shader_program; prog->state.type = PIPE_SHADER_IR_NIR; /* Parameters will be filled during NIR linking. */ prog->Parameters = _mesa_new_parameter_list(); if (shader_program->data->spirv) { prog->nir = _mesa_spirv_to_nir(ctx, shader_program, shader->Stage, options); } else { if (ctx->_Shader->Flags & GLSL_DUMP) { _mesa_log("\n"); _mesa_log("GLSL IR for linked %s program %d:\n", _mesa_shader_stage_to_string(shader->Stage), shader_program->Name); _mesa_print_ir(mesa_log_get_file(), shader->ir, NULL); _mesa_log("\n\n"); } prog->nir = glsl_to_nir(&st->ctx->Const, &shader->ir, &shader->Program->info, shader->Stage, options); prog->nir->info.name = ralloc_asprintf(shader, "GLSL%d", shader_program->Name); if (shader_program->Label) prog->nir->info.label = ralloc_strdup(shader, shader_program->Label); if (prog->nir->info.stage == MESA_SHADER_FRAGMENT) { prog->nir->info.fs.pixel_center_integer = prog->info.fs.pixel_center_integer; prog->nir->info.fs.origin_upper_left = prog->info.fs.origin_upper_left; prog->nir->info.fs.advanced_blend_modes = prog->info.fs.advanced_blend_modes; } } memcpy(prog->nir->info.source_blake3, shader->linked_source_blake3, BLAKE3_OUT_LEN); nir_shader_gather_info(prog->nir, nir_shader_get_entrypoint(prog->nir)); if (!st->ctx->SoftFP64 && ((prog->nir->info.bit_sizes_int | prog->nir->info.bit_sizes_float) & 64) && (options->lower_doubles_options & nir_lower_fp64_full_software) != 0) { /* It's not possible to use float64 on GLSL ES, so don't bother trying to * build the support code. The support code depends on higher versions of * desktop GLSL, so it will fail to compile (below) anyway. */ if (_mesa_is_desktop_gl(st->ctx) && st->ctx->Const.GLSLVersion >= 400) st->ctx->SoftFP64 = glsl_float64_funcs_to_nir(st->ctx, options); } } if (shader_program->data->spirv) { static const gl_nir_linker_options opts = { true /*fill_parameters */ }; if (!gl_nir_link_spirv(&ctx->Const, &ctx->Extensions, shader_program, &opts)) return GL_FALSE; } else { if (!gl_nir_link_glsl(ctx, shader_program)) return GL_FALSE; } for (unsigned i = 0; i < num_shaders; i++) { struct gl_program *prog = linked_shader[i]->Program; prog->ExternalSamplersUsed = gl_external_samplers(prog); _mesa_update_shader_textures_used(shader_program, prog); } nir_build_program_resource_list(&ctx->Const, shader_program, shader_program->data->spirv); for (unsigned i = 0; i < num_shaders; i++) { struct gl_linked_shader *shader = linked_shader[i]; nir_shader *nir = shader->Program->nir; gl_shader_stage stage = shader->Stage; const struct gl_shader_compiler_options *options = &ctx->Const.ShaderCompilerOptions[stage]; if (nir->info.io_lowered) { /* Since IO is lowered, we won't need the IO variables from now on. * nir_build_program_resource_list was the last pass that needed them. */ NIR_PASS_V(nir, nir_remove_dead_variables, nir_var_shader_in | nir_var_shader_out, NULL); } /* If there are forms of indirect addressing that the driver * cannot handle, perform the lowering pass. */ if (options->EmitNoIndirectInput || options->EmitNoIndirectOutput || options->EmitNoIndirectTemp || options->EmitNoIndirectUniform) { nir_variable_mode mode = (nir_variable_mode)0; if (!nir->info.io_lowered) { mode |= options->EmitNoIndirectInput ? nir_var_shader_in : (nir_variable_mode)0; mode |= options->EmitNoIndirectOutput ? nir_var_shader_out : (nir_variable_mode)0; } mode |= options->EmitNoIndirectTemp ? nir_var_function_temp : (nir_variable_mode)0; mode |= options->EmitNoIndirectUniform ? nir_var_uniform | nir_var_mem_ubo | nir_var_mem_ssbo : (nir_variable_mode)0; if (mode) nir_lower_indirect_derefs(nir, mode, UINT32_MAX); } /* This needs to run after the initial pass of nir_lower_vars_to_ssa, so * that the buffer indices are constants in nir where they where * constants in GLSL. */ NIR_PASS(_, nir, gl_nir_lower_buffers, shader_program); NIR_PASS(_, nir, st_nir_lower_wpos_ytransform, shader->Program, st->screen); /* needed to lower base_workgroup_id and base_global_invocation_id */ struct nir_lower_compute_system_values_options cs_options = {}; NIR_PASS(_, nir, nir_lower_system_values); NIR_PASS(_, nir, nir_lower_compute_system_values, &cs_options); if (nir->info.io_lowered) continue; /* the rest is for non-lowered IO only */ /* Remap the locations to slots so those requiring two slots will occupy * two locations. For instance, if we have in the IR code a dvec3 attr0 in * location 0 and vec4 attr1 in location 1, in NIR attr0 will use * locations/slots 0 and 1, and attr1 will use location/slot 2 */ if (nir->info.stage == MESA_SHADER_VERTEX && !shader_program->data->spirv) nir_remap_dual_slot_attributes(nir, &shader->Program->DualSlotInputs); if (i >= 1) { struct gl_program *prev_shader = linked_shader[i - 1]->Program; /* We can't use nir_compact_varyings with transform feedback, since * the pipe_stream_output->output_register field is based on the * pre-compacted driver_locations. */ if (!(prev_shader->sh.LinkedTransformFeedback && prev_shader->sh.LinkedTransformFeedback->NumVarying > 0)) nir_compact_varyings(prev_shader->nir, nir, ctx->API != API_OPENGL_COMPAT); if (ctx->Const.ShaderCompilerOptions[shader->Stage].NirOptions->vectorize_io) st_nir_vectorize_io(prev_shader->nir, nir); } } /* If the program is a separate shader program check if we need to vectorise * the first and last program interfaces too. */ if (shader_program->SeparateShader && num_shaders > 0) { struct gl_linked_shader *first_shader = linked_shader[0]; struct gl_linked_shader *last_shader = linked_shader[num_shaders - 1]; if (first_shader->Stage != MESA_SHADER_COMPUTE) { if (ctx->Const.ShaderCompilerOptions[first_shader->Stage].NirOptions->vectorize_io && first_shader->Stage > MESA_SHADER_VERTEX) st_nir_vectorize_io(NULL, first_shader->Program->nir); if (ctx->Const.ShaderCompilerOptions[last_shader->Stage].NirOptions->vectorize_io && last_shader->Stage < MESA_SHADER_FRAGMENT) st_nir_vectorize_io(last_shader->Program->nir, NULL); } } struct shader_info *prev_info = NULL; for (unsigned i = 0; i < num_shaders; i++) { struct gl_linked_shader *shader = linked_shader[i]; struct shader_info *info = &shader->Program->nir->info; char *msg = st_glsl_to_nir_post_opts(st, shader->Program, shader_program); if (msg) { linker_error(shader_program, msg); return false; } if (prev_info && ctx->Const.ShaderCompilerOptions[shader->Stage].NirOptions->unify_interfaces) { prev_info->outputs_written |= info->inputs_read & ~(VARYING_BIT_TESS_LEVEL_INNER | VARYING_BIT_TESS_LEVEL_OUTER); info->inputs_read |= prev_info->outputs_written & ~(VARYING_BIT_TESS_LEVEL_INNER | VARYING_BIT_TESS_LEVEL_OUTER); prev_info->patch_outputs_written |= info->patch_inputs_read; info->patch_inputs_read |= prev_info->patch_outputs_written; } prev_info = info; } for (unsigned i = 0; i < num_shaders; i++) { struct gl_linked_shader *shader = linked_shader[i]; struct gl_program *prog = shader->Program; /* Make sure that prog->info is in sync with nir->info, but st/mesa * expects some of the values to be from before lowering. */ shader_info old_info = prog->info; prog->info = prog->nir->info; prog->info.name = old_info.name; prog->info.label = old_info.label; prog->info.num_ssbos = old_info.num_ssbos; prog->info.num_ubos = old_info.num_ubos; prog->info.num_abos = old_info.num_abos; if (prog->info.stage == MESA_SHADER_VERTEX) { if (prog->nir->info.io_lowered && prog->nir->options->io_options & nir_io_glsl_opt_varyings) { prog->info.inputs_read = prog->nir->info.inputs_read; prog->DualSlotInputs = prog->nir->info.dual_slot_inputs; } else { /* NIR expands dual-slot inputs out to two locations. We need to * compact things back down GL-style single-slot inputs to avoid * confusing the state tracker. */ prog->info.inputs_read = nir_get_single_slot_attribs_mask(prog->nir->info.inputs_read, prog->DualSlotInputs); } /* Initialize st_vertex_program members. */ st_prepare_vertex_program(prog); } /* Get pipe_stream_output_info. */ if (shader->Stage == MESA_SHADER_VERTEX || shader->Stage == MESA_SHADER_TESS_EVAL || shader->Stage == MESA_SHADER_GEOMETRY) st_translate_stream_output_info(prog); st_store_nir_in_disk_cache(st, prog); st_release_variants(st, prog); st_finalize_program(st, prog); } struct pipe_context *pctx = st_context(ctx)->pipe; if (pctx->link_shader) { void *driver_handles[PIPE_SHADER_TYPES]; memset(driver_handles, 0, sizeof(driver_handles)); for (uint32_t i = 0; i < MESA_SHADER_STAGES; ++i) { struct gl_linked_shader *shader = shader_program->_LinkedShaders[i]; if (shader) { struct gl_program *p = shader->Program; if (p && p->variants) { enum pipe_shader_type type = pipe_shader_type_from_mesa(shader->Stage); driver_handles[type] = p->variants->driver_shader; } } } pctx->link_shader(pctx, driver_handles); } return true; } void st_nir_assign_varying_locations(struct st_context *st, nir_shader *nir) { /* Lowered IO don't have variables, so exit. */ if (nir->info.io_lowered) return; if (nir->info.stage == MESA_SHADER_VERTEX) { nir_assign_io_var_locations(nir, nir_var_shader_out, &nir->num_outputs, nir->info.stage); st_nir_fixup_varying_slots(st, nir, nir_var_shader_out); } else if (nir->info.stage == MESA_SHADER_GEOMETRY || nir->info.stage == MESA_SHADER_TESS_CTRL || nir->info.stage == MESA_SHADER_TESS_EVAL) { nir_assign_io_var_locations(nir, nir_var_shader_in, &nir->num_inputs, nir->info.stage); st_nir_fixup_varying_slots(st, nir, nir_var_shader_in); nir_assign_io_var_locations(nir, nir_var_shader_out, &nir->num_outputs, nir->info.stage); st_nir_fixup_varying_slots(st, nir, nir_var_shader_out); } else if (nir->info.stage == MESA_SHADER_FRAGMENT) { nir_assign_io_var_locations(nir, nir_var_shader_in, &nir->num_inputs, nir->info.stage); st_nir_fixup_varying_slots(st, nir, nir_var_shader_in); nir_assign_io_var_locations(nir, nir_var_shader_out, &nir->num_outputs, nir->info.stage); } else if (nir->info.stage == MESA_SHADER_COMPUTE) { /* TODO? */ } else { unreachable("invalid shader type"); } } void st_nir_lower_samplers(struct pipe_screen *screen, nir_shader *nir, struct gl_shader_program *shader_program, struct gl_program *prog) { if (screen->get_param(screen, PIPE_CAP_NIR_SAMPLERS_AS_DEREF)) NIR_PASS(_, nir, gl_nir_lower_samplers_as_deref, shader_program); else NIR_PASS(_, nir, gl_nir_lower_samplers, shader_program); if (prog) { BITSET_COPY(prog->info.textures_used, nir->info.textures_used); BITSET_COPY(prog->info.textures_used_by_txf, nir->info.textures_used_by_txf); BITSET_COPY(prog->info.samplers_used, nir->info.samplers_used); BITSET_COPY(prog->info.images_used, nir->info.images_used); BITSET_COPY(prog->info.image_buffers, nir->info.image_buffers); BITSET_COPY(prog->info.msaa_images, nir->info.msaa_images); } } static int st_packed_uniforms_type_size(const struct glsl_type *type, bool bindless) { return glsl_count_dword_slots(type, bindless); } static int st_unpacked_uniforms_type_size(const struct glsl_type *type, bool bindless) { return glsl_count_vec4_slots(type, false, bindless); } void st_nir_lower_uniforms(struct st_context *st, nir_shader *nir) { if (st->ctx->Const.PackedDriverUniformStorage) { NIR_PASS(_, nir, nir_lower_io, nir_var_uniform, st_packed_uniforms_type_size, (nir_lower_io_options)0); } else { NIR_PASS(_, nir, nir_lower_io, nir_var_uniform, st_unpacked_uniforms_type_size, (nir_lower_io_options)0); } if (nir->options->lower_uniforms_to_ubo) NIR_PASS(_, nir, nir_lower_uniforms_to_ubo, st->ctx->Const.PackedDriverUniformStorage, !st->ctx->Const.NativeIntegers); } /* Last third of preparing nir from glsl, which happens after shader * variant lowering. */ char * st_finalize_nir(struct st_context *st, struct gl_program *prog, struct gl_shader_program *shader_program, nir_shader *nir, bool finalize_by_driver, bool is_before_variants, bool is_draw_shader) { struct pipe_screen *screen = st->screen; MESA_TRACE_FUNC(); NIR_PASS(_, nir, nir_split_var_copies); NIR_PASS(_, nir, nir_lower_var_copies); const bool lower_tg4_offsets = !is_draw_shader && !st->screen->get_param(screen, PIPE_CAP_TEXTURE_GATHER_OFFSETS); if (!is_draw_shader && (st->lower_rect_tex || lower_tg4_offsets)) { struct nir_lower_tex_options opts = {0}; opts.lower_rect = !!st->lower_rect_tex; opts.lower_tg4_offsets = lower_tg4_offsets; NIR_PASS(_, nir, nir_lower_tex, &opts); } st_nir_assign_varying_locations(st, nir); st_nir_assign_uniform_locations(st->ctx, prog, nir); /* Lower load_deref/store_deref of inputs and outputs. * This depends on st_nir_assign_varying_locations. * * TODO: remove this once nir_io_glsl_opt_varyings is enabled by default. */ if (!is_draw_shader && nir->options->io_options & nir_io_glsl_lower_derefs && !(nir->options->io_options & nir_io_glsl_opt_varyings)) { nir_lower_io_passes(nir, false); NIR_PASS(_, nir, nir_remove_dead_variables, nir_var_shader_in | nir_var_shader_out, NULL); } /* Set num_uniforms in number of attribute slots (vec4s) */ nir->num_uniforms = DIV_ROUND_UP(prog->Parameters->NumParameterValues, 4); st_nir_lower_uniforms(st, nir); if (!is_draw_shader && is_before_variants && nir->options->lower_uniforms_to_ubo) { /* This must be done after uniforms are lowered to UBO and all * nir_var_uniform variables are removed from NIR to prevent conflicts * between state parameter merging and shader variant generation. */ _mesa_optimize_state_parameters(&st->ctx->Const, prog->Parameters); } st_nir_lower_samplers(screen, nir, shader_program, prog); if (!is_draw_shader && !screen->get_param(screen, PIPE_CAP_NIR_IMAGES_AS_DEREF)) NIR_PASS(_, nir, gl_nir_lower_images, false); char *msg = NULL; if (!is_draw_shader && finalize_by_driver && screen->finalize_nir) msg = screen->finalize_nir(screen, nir); return msg; } /** * Link a GLSL shader program. Called via glLinkProgram(). */ void st_link_shader(struct gl_context *ctx, struct gl_shader_program *prog) { unsigned int i; bool spirv = false; MESA_TRACE_FUNC(); _mesa_clear_shader_program_data(ctx, prog); prog->data = _mesa_create_shader_program_data(); prog->data->LinkStatus = LINKING_SUCCESS; for (i = 0; i < prog->NumShaders; i++) { if (!prog->Shaders[i]->CompileStatus) { linker_error(prog, "linking with uncompiled/unspecialized shader"); } if (!i) { spirv = (prog->Shaders[i]->spirv_data != NULL); } else if (spirv && !prog->Shaders[i]->spirv_data) { /* The GL_ARB_gl_spirv spec adds a new bullet point to the list of * reasons LinkProgram can fail: * * "All the shader objects attached to do not have the * same value for the SPIR_V_BINARY_ARB state." */ linker_error(prog, "not all attached shaders have the same " "SPIR_V_BINARY_ARB state"); } } prog->data->spirv = spirv; if (prog->data->LinkStatus) { if (!spirv) link_shaders(ctx, prog); else _mesa_spirv_link_shaders(ctx, prog); } /* If LinkStatus is LINKING_SUCCESS, then reset sampler validated to true. * Validation happens via the LinkShader call below. If LinkStatus is * LINKING_SKIPPED, then SamplersValidated will have been restored from the * shader cache. */ if (prog->data->LinkStatus == LINKING_SUCCESS) { prog->SamplersValidated = GL_TRUE; } if (prog->data->LinkStatus && !st_link_glsl_to_nir(ctx, prog)) { prog->data->LinkStatus = LINKING_FAILURE; } if (prog->data->LinkStatus != LINKING_FAILURE) _mesa_create_program_resource_hash(prog); /* Return early if we are loading the shader from on-disk cache */ if (prog->data->LinkStatus == LINKING_SKIPPED) return; if (ctx->_Shader->Flags & GLSL_DUMP) { if (!prog->data->LinkStatus) { fprintf(stderr, "GLSL shader program %d failed to link\n", prog->Name); } if (prog->data->InfoLog && prog->data->InfoLog[0] != 0) { fprintf(stderr, "GLSL shader program %d info log:\n", prog->Name); fprintf(stderr, "%s\n", prog->data->InfoLog); } } #ifdef ENABLE_SHADER_CACHE if (prog->data->LinkStatus) shader_cache_write_program_metadata(ctx, prog); #endif } } /* extern "C" */