From: Marek Olšák Date: Tue, 19 Nov 2019 22:30:03 +0000 (-0500) Subject: st/mesa: simplify looping over linked shaders when linking NIR X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=adbba2142d9c3b85c550d08927c49fbfc52bddee;p=mesa.git st/mesa: simplify looping over linked shaders when linking NIR Reviewed-by: Timothy Arceri --- diff --git a/src/mesa/state_tracker/st_glsl_to_nir.cpp b/src/mesa/state_tracker/st_glsl_to_nir.cpp index a157e886397..343b2400eb3 100644 --- a/src/mesa/state_tracker/st_glsl_to_nir.cpp +++ b/src/mesa/state_tracker/st_glsl_to_nir.cpp @@ -634,16 +634,16 @@ st_link_nir(struct gl_context *ctx, struct gl_shader_program *shader_program) { struct st_context *st = st_context(ctx); - unsigned num_linked_shaders = 0; + struct gl_linked_shader *linked_shader[MESA_SHADER_STAGES]; + unsigned num_shaders = 0; - unsigned last_stage = 0; for (unsigned i = 0; i < MESA_SHADER_STAGES; i++) { - struct gl_linked_shader *shader = shader_program->_LinkedShaders[i]; - if (shader == NULL) - continue; - - num_linked_shaders++; + 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; @@ -683,8 +683,6 @@ st_link_nir(struct gl_context *ctx, st_nir_preprocess(st, prog, shader_program, shader->Stage); } - last_stage = i; - if (options->lower_to_scalar) { NIR_PASS_V(shader->Program->nir, nir_lower_load_const_to_scalar); } @@ -704,15 +702,12 @@ st_link_nir(struct gl_context *ctx, nir_build_program_resource_list(ctx, shader_program); - for (unsigned i = 0; i < MESA_SHADER_STAGES; i++) { - struct gl_linked_shader *shader = shader_program->_LinkedShaders[i]; - if (shader == NULL) - continue; - + for (unsigned i = 0; i < num_shaders; i++) { + struct gl_linked_shader *shader = linked_shader[i]; struct gl_program *prog = shader->Program; + prog->ExternalSamplersUsed = gl_external_samplers(prog); _mesa_update_shader_textures_used(shader_program, prog); - st_nir_preprocess(st, prog, shader_program, shader->Stage); } } @@ -722,29 +717,19 @@ st_link_nir(struct gl_context *ctx, * are eliminated if they are (transitively) not used in a later * stage. */ - int next = last_stage; - for (int i = next - 1; i >= 0; i--) { - struct gl_linked_shader *shader = shader_program->_LinkedShaders[i]; - if (shader == NULL) - continue; - - st_nir_link_shaders(&shader->Program->nir, - &shader_program->_LinkedShaders[next]->Program->nir); - next = i; + for (int i = num_shaders - 2; i >= 0; i--) { + st_nir_link_shaders(&linked_shader[i]->Program->nir, + &linked_shader[i + 1]->Program->nir); } - int prev = -1; - for (unsigned i = 0; i < MESA_SHADER_STAGES; i++) { - struct gl_linked_shader *shader = shader_program->_LinkedShaders[i]; - if (shader == NULL) - continue; - + for (unsigned i = 0; i < num_shaders; i++) { + struct gl_linked_shader *shader = linked_shader[i]; nir_shader *nir = shader->Program->nir; /* Linked shaders are optimized in st_nir_link_shaders. Separate shaders * and shaders with a fixed-func VS or FS are optimized here. */ - if (num_linked_shaders == 1) + if (num_shaders == 1) st_nir_opts(nir); NIR_PASS_V(nir, st_nir_lower_wpos_ytransform, shader->Program, @@ -755,7 +740,7 @@ st_link_nir(struct gl_context *ctx, nir_shader_gather_info(nir, nir_shader_get_entrypoint(nir)); shader->Program->info = nir->info; - if (i == MESA_SHADER_VERTEX) { + if (shader->Stage == MESA_SHADER_VERTEX) { /* 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. @@ -765,9 +750,8 @@ st_link_nir(struct gl_context *ctx, shader->Program->DualSlotInputs); } - if (prev != -1) { - struct gl_program *prev_shader = - shader_program->_LinkedShaders[prev]->Program; + 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 @@ -775,32 +759,28 @@ st_link_nir(struct gl_context *ctx, */ if (!(prev_shader->sh.LinkedTransformFeedback && prev_shader->sh.LinkedTransformFeedback->NumVarying > 0)) - nir_compact_varyings(shader_program->_LinkedShaders[prev]->Program->nir, - nir, ctx->API != API_OPENGL_COMPAT); + nir_compact_varyings(prev_shader->nir, + nir, ctx->API != API_OPENGL_COMPAT); - if (ctx->Const.ShaderCompilerOptions[i].NirOptions->vectorize_io) + if (ctx->Const.ShaderCompilerOptions[shader->Stage].NirOptions->vectorize_io) st_nir_vectorize_io(prev_shader->nir, nir); } - prev = i; } - for (unsigned i = 0; i < MESA_SHADER_STAGES; i++) { - struct gl_linked_shader *shader = shader_program->_LinkedShaders[i]; - if (shader == NULL) - continue; - + for (unsigned i = 0; i < num_shaders; i++) { + struct gl_linked_shader *shader = linked_shader[i]; struct gl_program *prog = shader->Program; struct st_program *stp = st_program(prog); st_glsl_to_nir_post_opts(st, prog, shader_program); /* Initialize st_vertex_program members. */ - if (i == MESA_SHADER_VERTEX) + if (shader->Stage == MESA_SHADER_VERTEX) st_prepare_vertex_program(stp); /* Get pipe_stream_output_info. */ - if (i == MESA_SHADER_VERTEX || - i == MESA_SHADER_TESS_EVAL || - i == MESA_SHADER_GEOMETRY) + 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_ir_in_disk_cache(st, prog, true);