| // Copyright (c) 2019 Google LLC. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "source/opt/legalize_vector_shuffle_pass.h" |
| |
| #include "source/opt/ir_context.h" |
| |
| namespace spvtools { |
| namespace opt { |
| |
| Pass::Status LegalizeVectorShufflePass::Process() { |
| bool changed = false; |
| context()->module()->ForEachInst([&changed](Instruction* inst) { |
| if (inst->opcode() != SpvOpVectorShuffle) return; |
| |
| for (uint32_t idx = 2; idx < inst->NumInOperands(); ++idx) { |
| auto literal = inst->GetSingleWordInOperand(idx); |
| if (literal != 0xFFFFFFFF) continue; |
| changed = true; |
| inst->SetInOperand(idx, {0}); |
| } |
| }); |
| |
| return changed ? Status::SuccessWithChange : Status::SuccessWithoutChange; |
| } |
| |
| } // namespace opt |
| } // namespace spvtools |