nir_shader * brw_create_nir(struct brw_context *brw, const struct gl_shader_program *shader_prog, const struct gl_program *prog, gl_shader_stage stage, bool is_scalar) { struct gl_context *ctx = &brw->ctx; const nir_shader_compiler_options *options = ctx->Const.ShaderCompilerOptions[stage].NirOptions; bool progress; nir_shader *nir; /* First, lower the GLSL IR or Mesa IR to NIR */ if (shader_prog) { nir = glsl_to_nir(shader_prog, stage, options); nir_remove_dead_variables(nir, nir_var_shader_in | nir_var_shader_out); NIR_PASS_V(nir, nir_lower_io_to_temporaries, nir_shader_get_entrypoint(nir), true, false); } else { nir = prog_to_nir(prog, options); NIR_PASS_V(nir, nir_convert_to_ssa); /* turn registers into SSA */ } nir_validate_shader(nir); (void)progress; nir = brw_preprocess_nir(brw->screen->compiler, nir); if (stage == MESA_SHADER_FRAGMENT) { static const struct nir_lower_wpos_ytransform_options wpos_options = { .state_tokens = {STATE_INTERNAL, STATE_FB_WPOS_Y_TRANSFORM, 0, 0, 0}, .fs_coord_pixel_center_integer = 1, .fs_coord_origin_upper_left = 1, }; _mesa_add_state_reference(prog->Parameters, (gl_state_index *) wpos_options.state_tokens); NIR_PASS(progress, nir, nir_lower_wpos_ytransform, &wpos_options); } NIR_PASS(progress, nir, nir_lower_system_values); NIR_PASS_V(nir, brw_nir_lower_uniforms, is_scalar); nir_shader_gather_info(nir, nir_shader_get_entrypoint(nir)); if (shader_prog) { NIR_PASS_V(nir, nir_lower_samplers, shader_prog); NIR_PASS_V(nir, nir_lower_atomics, shader_prog); } return nir; }
nir_shader * brw_create_nir(struct brw_context *brw, const struct gl_shader_program *shader_prog, const struct gl_program *prog, gl_shader_stage stage, bool is_scalar) { struct gl_context *ctx = &brw->ctx; const nir_shader_compiler_options *options = ctx->Const.ShaderCompilerOptions[stage].NirOptions; struct gl_shader *shader = shader_prog ? shader_prog->_LinkedShaders[stage] : NULL; bool debug_enabled = INTEL_DEBUG & intel_debug_flag_for_shader_stage(stage); nir_shader *nir; /* First, lower the GLSL IR or Mesa IR to NIR */ if (shader_prog) { nir = glsl_to_nir(shader, options); } else { nir = prog_to_nir(prog, options); nir_convert_to_ssa(nir); /* turn registers into SSA */ } nir_validate_shader(nir); nir_lower_global_vars_to_local(nir); nir_validate_shader(nir); nir_lower_tex_projector(nir); nir_validate_shader(nir); nir_normalize_cubemap_coords(nir); nir_validate_shader(nir); nir_split_var_copies(nir); nir_validate_shader(nir); nir_optimize(nir, is_scalar); /* Lower a bunch of stuff */ nir_lower_var_copies(nir); nir_validate_shader(nir); /* Get rid of split copies */ nir_optimize(nir, is_scalar); if (is_scalar) { nir_assign_var_locations(&nir->uniforms, &nir->num_uniforms, type_size_scalar); nir_assign_var_locations(&nir->inputs, &nir->num_inputs, type_size_scalar); nir_assign_var_locations(&nir->outputs, &nir->num_outputs, type_size_scalar); nir_lower_io(nir, type_size_scalar); } else { nir_assign_var_locations(&nir->uniforms, &nir->num_uniforms, type_size_vec4); nir_assign_var_locations(&nir->inputs, &nir->num_inputs, type_size_vec4); foreach_list_typed(nir_variable, var, node, &nir->outputs) var->data.driver_location = var->data.location; nir_lower_io(nir, type_size_vec4); } nir_validate_shader(nir); nir_remove_dead_variables(nir); nir_validate_shader(nir); if (shader_prog) { nir_lower_samplers(nir, shader_prog); nir_validate_shader(nir); } nir_lower_system_values(nir); nir_validate_shader(nir); nir_lower_atomics(nir); nir_validate_shader(nir); nir_optimize(nir, is_scalar); if (brw->gen >= 6) { /* Try and fuse multiply-adds */ nir_opt_peephole_ffma(nir); nir_validate_shader(nir); } nir_opt_algebraic_late(nir); nir_validate_shader(nir); nir_lower_locals_to_regs(nir); nir_validate_shader(nir); nir_lower_to_source_mods(nir); nir_validate_shader(nir); nir_copy_prop(nir); nir_validate_shader(nir); nir_opt_dce(nir); nir_validate_shader(nir); if (unlikely(debug_enabled)) { /* Re-index SSA defs so we print more sensible numbers. */ nir_foreach_overload(nir, overload) { if (overload->impl) nir_index_ssa_defs(overload->impl); } fprintf(stderr, "NIR (SSA form) for %s shader:\n", _mesa_shader_stage_to_string(stage)); nir_print_shader(nir, stderr); } nir_convert_from_ssa(nir, is_scalar); nir_validate_shader(nir); if (!is_scalar) { nir_lower_vec_to_movs(nir); nir_validate_shader(nir); } /* This is the last pass we run before we start emitting stuff. It * determines when we need to insert boolean resolves on Gen <= 5. We * run it last because it stashes data in instr->pass_flags and we don't * want that to be squashed by other NIR passes. */ if (brw->gen <= 5) brw_nir_analyze_boolean_resolves(nir); nir_sweep(nir); if (unlikely(debug_enabled)) { fprintf(stderr, "NIR (final form) for %s shader:\n", _mesa_shader_stage_to_string(stage)); nir_print_shader(nir, stderr); } return nir; }
static nir_shader * load_glsl(unsigned num_files, char* const* files, gl_shader_stage stage) { static const struct standalone_options options = { .glsl_version = 140, .do_link = true, }; struct gl_shader_program *prog; prog = standalone_compile_shader(&options, num_files, files); if (!prog) errx(1, "couldn't parse `%s'", files[0]); nir_shader *nir = glsl_to_nir(prog, stage, ir3_get_compiler_options()); standalone_compiler_cleanup(prog); /* required NIR passes: */ /* TODO cmdline args for some of the conditional lowering passes? */ NIR_PASS_V(nir, nir_lower_io_to_temporaries, nir_shader_get_entrypoint(nir), true, true); NIR_PASS_V(nir, nir_lower_global_vars_to_local); NIR_PASS_V(nir, nir_split_var_copies); NIR_PASS_V(nir, nir_lower_var_copies); NIR_PASS_V(nir, nir_split_var_copies); NIR_PASS_V(nir, nir_lower_var_copies); NIR_PASS_V(nir, nir_lower_io_types); // TODO nir_assign_var_locations?? NIR_PASS_V(nir, nir_lower_system_values); NIR_PASS_V(nir, nir_lower_io, nir_var_all, st_glsl_type_size); NIR_PASS_V(nir, nir_lower_samplers, prog); return nir; } static int read_file(const char *filename, void **ptr, size_t *size) { int fd, ret; struct stat st; *ptr = MAP_FAILED; fd = open(filename, O_RDONLY); if (fd == -1) { warnx("couldn't open `%s'", filename); return 1; } ret = fstat(fd, &st); if (ret) errx(1, "couldn't stat `%s'", filename); *size = st.st_size; *ptr = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0); if (*ptr == MAP_FAILED) errx(1, "couldn't map `%s'", filename); close(fd); return 0; }