| /* |
| * Copyright © 2017 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" |
| |
| /** |
| * \file nir_opt_intrinsics.c |
| */ |
| |
| static bool |
| opt_intrinsics_impl(nir_function_impl *impl, |
| const struct nir_shader_compiler_options *options) |
| { |
| nir_builder b; |
| nir_builder_init(&b, impl); |
| bool progress = false; |
| |
| nir_foreach_block(block, impl) { |
| nir_foreach_instr_safe(instr, block) { |
| if (instr->type != nir_instr_type_intrinsic) |
| continue; |
| |
| nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr); |
| nir_ssa_def *replacement = NULL; |
| b.cursor = nir_before_instr(instr); |
| |
| switch (intrin->intrinsic) { |
| case nir_intrinsic_vote_any: |
| case nir_intrinsic_vote_all: |
| if (nir_src_is_const(intrin->src[0])) |
| replacement = nir_ssa_for_src(&b, intrin->src[0], 1); |
| break; |
| case nir_intrinsic_vote_feq: |
| case nir_intrinsic_vote_ieq: |
| if (nir_src_is_const(intrin->src[0])) |
| replacement = nir_imm_true(&b); |
| break; |
| case nir_intrinsic_load_sample_mask_in: |
| /* Transform: |
| * gl_SampleMaskIn == 0 ---> gl_HelperInvocation |
| * gl_SampleMaskIn != 0 ---> !gl_HelperInvocation |
| */ |
| if (!options->optimize_sample_mask_in) |
| continue; |
| |
| nir_foreach_use_safe(use_src, &intrin->dest.ssa) { |
| if (use_src->parent_instr->type == nir_instr_type_alu) { |
| nir_alu_instr *alu = nir_instr_as_alu(use_src->parent_instr); |
| |
| if (alu->op == nir_op_ieq || |
| alu->op == nir_op_ine) { |
| /* Check for 0 in either operand. */ |
| nir_const_value *const_val = |
| nir_src_as_const_value(alu->src[0].src); |
| if (!const_val) |
| const_val = nir_src_as_const_value(alu->src[1].src); |
| if (!const_val || const_val->i32 != 0) |
| continue; |
| |
| nir_ssa_def *new_expr = nir_load_helper_invocation(&b, 1); |
| |
| if (alu->op == nir_op_ine) |
| new_expr = nir_inot(&b, new_expr); |
| |
| nir_ssa_def_rewrite_uses(&alu->dest.dest.ssa, |
| nir_src_for_ssa(new_expr)); |
| nir_instr_remove(&alu->instr); |
| continue; |
| } |
| } |
| } |
| continue; |
| default: |
| break; |
| } |
| |
| if (!replacement) |
| continue; |
| |
| nir_ssa_def_rewrite_uses(&intrin->dest.ssa, |
| nir_src_for_ssa(replacement)); |
| nir_instr_remove(instr); |
| progress = true; |
| } |
| } |
| |
| return progress; |
| } |
| |
| bool |
| nir_opt_intrinsics(nir_shader *shader) |
| { |
| bool progress = false; |
| |
| nir_foreach_function(function, shader) { |
| if (!function->impl) |
| continue; |
| |
| if (opt_intrinsics_impl(function->impl, shader->options)) { |
| progress = true; |
| nir_metadata_preserve(function->impl, nir_metadata_block_index | |
| nir_metadata_dominance); |
| } else { |
| nir_metadata_preserve(function->impl, nir_metadata_all); |
| } |
| } |
| |
| return progress; |
| } |