2016-07-16 00:44:53 +01:00
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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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2018-03-16 19:08:15 +00:00
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static void
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build_constant_load(nir_builder *b, nir_deref_instr *deref, nir_constant *c)
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2016-07-16 00:44:53 +01:00
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{
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2018-03-16 19:08:15 +00:00
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if (glsl_type_is_vector_or_scalar(deref->type)) {
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nir_load_const_instr *load =
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nir_load_const_instr_create(b->shader,
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glsl_get_vector_elements(deref->type),
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glsl_get_bit_size(deref->type));
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load->value = c->values[0];
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nir_builder_instr_insert(b, &load->instr);
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nir_store_deref(b, deref, &load->def, ~0);
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} else if (glsl_type_is_matrix(deref->type)) {
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unsigned cols = glsl_get_matrix_columns(deref->type);
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unsigned rows = glsl_get_vector_elements(deref->type);
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unsigned bit_size = glsl_get_bit_size(deref->type);
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for (unsigned i = 0; i < cols; i++) {
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nir_load_const_instr *load =
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nir_load_const_instr_create(b->shader, rows, bit_size);
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load->value = c->values[i];
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nir_builder_instr_insert(b, &load->instr);
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nir_store_deref(b, nir_build_deref_array(b, deref, nir_imm_int(b, i)),
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&load->def, ~0);
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}
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} else if (glsl_type_is_struct(deref->type)) {
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unsigned len = glsl_get_length(deref->type);
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for (unsigned i = 0; i < len; i++) {
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build_constant_load(b, nir_build_deref_struct(b, deref, i),
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c->elements[i]);
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}
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} else {
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assert(glsl_type_is_array(deref->type));
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unsigned len = glsl_get_length(deref->type);
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for (unsigned i = 0; i < len; i++) {
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build_constant_load(b,
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nir_build_deref_array(b, deref, nir_imm_int(b, i)),
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c->elements[i]);
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}
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}
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2016-07-16 00:44:53 +01:00
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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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2018-03-16 19:08:15 +00:00
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build_constant_load(b, nir_build_deref_var(b, var),
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var->constant_initializer);
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2016-07-16 00:44:53 +01:00
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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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2019-01-09 03:49:14 +00:00
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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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bool impl_progress = false;
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nir_builder builder;
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nir_builder_init(&builder, function->impl);
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if ((modes & nir_var_shader_out) && function->is_entrypoint)
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impl_progress |= lower_const_initializer(&builder, &shader->outputs);
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2019-01-15 22:56:29 +00:00
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if ((modes & nir_var_shader_temp) && function->is_entrypoint)
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2019-01-10 11:23:04 +00:00
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impl_progress |= lower_const_initializer(&builder, &shader->globals);
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2019-01-09 03:49:14 +00:00
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if ((modes & nir_var_system_value) && function->is_entrypoint)
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2019-01-10 11:23:04 +00:00
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impl_progress |= lower_const_initializer(&builder, &shader->system_values);
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2019-01-09 03:49:14 +00:00
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2019-01-15 23:05:04 +00:00
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if (modes & nir_var_function_temp)
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2019-01-09 03:49:14 +00:00
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impl_progress |= lower_const_initializer(&builder, &function->impl->locals);
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2016-07-16 00:44:53 +01:00
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2019-01-09 03:49:14 +00:00
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if (impl_progress) {
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progress = true;
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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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2018-09-10 22:31:29 +01:00
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} else {
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#ifndef NDEBUG
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function->impl->valid_metadata &= ~nir_metadata_not_properly_reset;
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#endif
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2016-07-16 00:44:53 +01:00
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}
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}
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return progress;
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}
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