113 lines
3.6 KiB
C
113 lines
3.6 KiB
C
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/*
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* Copyright © 2016 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#include "nir.h"
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#include "nir_builder.h"
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static bool
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deref_apply_constant_initializer(nir_deref_var *deref, void *state)
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{
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struct nir_builder *b = state;
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nir_load_const_instr *initializer =
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nir_deref_get_const_initializer_load(b->shader, deref);
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nir_builder_instr_insert(b, &initializer->instr);
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nir_store_deref_var(b, deref, &initializer->def, 0xf);
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return true;
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}
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static bool
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lower_const_initializer(struct nir_builder *b, struct exec_list *var_list)
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{
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bool progress = false;
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b->cursor = nir_before_cf_list(&b->impl->body);
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nir_foreach_variable(var, var_list) {
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if (!var->constant_initializer)
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continue;
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progress = true;
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nir_deref_var deref;
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deref.deref.deref_type = nir_deref_type_var,
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deref.deref.child = NULL;
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deref.deref.type = var->type,
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deref.var = var;
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nir_deref_foreach_leaf(&deref, deref_apply_constant_initializer, b);
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var->constant_initializer = NULL;
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}
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return progress;
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}
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bool
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nir_lower_constant_initializers(nir_shader *shader, nir_variable_mode modes)
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{
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bool progress = false;
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nir_builder builder;
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if (modes & ~nir_var_local)
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nir_builder_init(&builder, nir_shader_get_entrypoint(shader));
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if (modes & nir_var_shader_out)
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progress |= lower_const_initializer(&builder, &shader->outputs);
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if (modes & nir_var_global)
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progress |= lower_const_initializer(&builder, &shader->globals);
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if (modes & nir_var_system_value)
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progress |= lower_const_initializer(&builder, &shader->system_values);
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if (progress) {
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nir_foreach_function(function, shader) {
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if (function->impl) {
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nir_metadata_preserve(function->impl, nir_metadata_block_index |
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nir_metadata_dominance |
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nir_metadata_live_ssa_defs);
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}
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}
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}
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if (modes & nir_var_local) {
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nir_foreach_function(function, shader) {
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if (!function->impl)
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continue;
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nir_builder_init(&builder, function->impl);
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if (lower_const_initializer(&builder, &function->impl->locals)) {
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nir_metadata_preserve(function->impl, nir_metadata_block_index |
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nir_metadata_dominance |
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nir_metadata_live_ssa_defs);
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progress = true;
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}
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}
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}
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return progress;
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}
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