| /* |
| * Copyright © 2016 Intel Corporation |
| * |
| * 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 "nir.h" |
| #include "nir_builder.h" |
| |
| static bool |
| deref_apply_constant_initializer(nir_deref_var *deref, void *state) |
| { |
| struct nir_builder *b = state; |
| |
| nir_load_const_instr *initializer = |
| nir_deref_get_const_initializer_load(b->shader, deref); |
| nir_builder_instr_insert(b, &initializer->instr); |
| |
| nir_store_deref_var(b, deref, &initializer->def, 0xf); |
| |
| return true; |
| } |
| |
| static bool |
| lower_const_initializer(struct nir_builder *b, struct exec_list *var_list) |
| { |
| bool progress = false; |
| |
| b->cursor = nir_before_cf_list(&b->impl->body); |
| |
| nir_foreach_variable(var, var_list) { |
| if (!var->constant_initializer) |
| continue; |
| |
| progress = true; |
| |
| nir_deref_var deref; |
| deref.deref.deref_type = nir_deref_type_var, |
| deref.deref.child = NULL; |
| deref.deref.type = var->type, |
| deref.var = var; |
| |
| nir_deref_foreach_leaf(&deref, deref_apply_constant_initializer, b); |
| |
| var->constant_initializer = NULL; |
| } |
| |
| return progress; |
| } |
| |
| bool |
| nir_lower_constant_initializers(nir_shader *shader, nir_variable_mode modes) |
| { |
| bool progress = false; |
| |
| nir_builder builder; |
| if (modes & ~nir_var_local) |
| nir_builder_init(&builder, nir_shader_get_entrypoint(shader)); |
| |
| if (modes & nir_var_shader_out) |
| progress |= lower_const_initializer(&builder, &shader->outputs); |
| |
| if (modes & nir_var_global) |
| progress |= lower_const_initializer(&builder, &shader->globals); |
| |
| if (modes & nir_var_system_value) |
| progress |= lower_const_initializer(&builder, &shader->system_values); |
| |
| if (progress) { |
| nir_foreach_function(function, shader) { |
| if (function->impl) { |
| nir_metadata_preserve(function->impl, nir_metadata_block_index | |
| nir_metadata_dominance | |
| nir_metadata_live_ssa_defs); |
| } |
| } |
| } |
| |
| if (modes & nir_var_local) { |
| nir_foreach_function(function, shader) { |
| if (!function->impl) |
| continue; |
| |
| nir_builder_init(&builder, function->impl); |
| if (lower_const_initializer(&builder, &function->impl->locals)) { |
| nir_metadata_preserve(function->impl, nir_metadata_block_index | |
| nir_metadata_dominance | |
| nir_metadata_live_ssa_defs); |
| progress = true; |
| } |
| } |
| } |
| |
| return progress; |
| } |