| /* |
| * Copyright © 2016 Intel Corporation |
| * Copyright © 2018 Valve 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" |
| |
| /** |
| * \file nir_opt_move_load_ubo.c |
| * |
| * This pass moves load UBO operations just before their first use inside |
| * the same basic block. |
| */ |
| static bool |
| move_load_ubo_source(nir_src *src, nir_block *block, nir_instr *before) |
| { |
| if (!src->is_ssa) |
| return false; |
| |
| nir_instr *src_instr = src->ssa->parent_instr; |
| |
| if (src_instr->block == block && |
| src_instr->type == nir_instr_type_intrinsic && |
| nir_instr_as_intrinsic(src_instr)->intrinsic == nir_intrinsic_load_ubo) { |
| |
| exec_node_remove(&src_instr->node); |
| |
| if (before) |
| exec_node_insert_node_before(&before->node, &src_instr->node); |
| else |
| exec_list_push_tail(&block->instr_list, &src_instr->node); |
| |
| return true; |
| } |
| return false; |
| } |
| |
| static bool |
| move_load_ubo_source_cb(nir_src *src, void *data) |
| { |
| bool *progress = data; |
| |
| nir_instr *instr = src->parent_instr; |
| if (move_load_ubo_source(src, instr->block, instr)) |
| *progress = true; |
| |
| return true; /* nir_foreach_src should keep going */ |
| } |
| |
| static bool |
| move_load_ubo(nir_block *block) |
| { |
| bool progress = false; |
| |
| nir_if *iff = nir_block_get_following_if(block); |
| if (iff) { |
| progress |= move_load_ubo_source(&iff->condition, block, NULL); |
| } |
| |
| nir_foreach_instr_reverse(instr, block) { |
| |
| if (instr->type == nir_instr_type_phi) { |
| /* We're going backwards so everything else is a phi too */ |
| } else if (instr->type == nir_instr_type_alu) { |
| nir_alu_instr *alu = nir_instr_as_alu(instr); |
| |
| for (int i = nir_op_infos[alu->op].num_inputs - 1; i >= 0; i--) { |
| progress |= move_load_ubo_source(&alu->src[i].src, block, instr); |
| } |
| } else { |
| nir_foreach_src(instr, move_load_ubo_source_cb, &progress); |
| } |
| } |
| |
| return false; |
| } |
| |
| bool |
| nir_opt_move_load_ubo(nir_shader *shader) |
| { |
| bool progress = false; |
| |
| nir_foreach_function(func, shader) { |
| if (!func->impl) |
| continue; |
| |
| nir_foreach_block(block, func->impl) { |
| if (move_load_ubo(block)) { |
| nir_metadata_preserve(func->impl, nir_metadata_block_index | |
| nir_metadata_dominance | |
| nir_metadata_live_ssa_defs); |
| progress = true; |
| } |
| } |
| } |
| |
| return progress; |
| } |