1 // Copyright (c) 2016 Google Inc. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 #include "source/opt/freeze_spec_constant_value_pass.h" 16 #include "source/opt/ir_context.h" 17 18 namespace spvtools { 19 namespace opt { 20 Process()21Pass::Status FreezeSpecConstantValuePass::Process() { 22 bool modified = false; 23 auto ctx = context(); 24 ctx->module()->ForEachInst([&modified, ctx](Instruction* inst) { 25 switch (inst->opcode()) { 26 case spv::Op::OpSpecConstant: 27 inst->SetOpcode(spv::Op::OpConstant); 28 modified = true; 29 break; 30 case spv::Op::OpSpecConstantTrue: 31 inst->SetOpcode(spv::Op::OpConstantTrue); 32 modified = true; 33 break; 34 case spv::Op::OpSpecConstantFalse: 35 inst->SetOpcode(spv::Op::OpConstantFalse); 36 modified = true; 37 break; 38 case spv::Op::OpDecorate: 39 if (spv::Decoration(inst->GetSingleWordInOperand(1)) == 40 spv::Decoration::SpecId) { 41 ctx->KillInst(inst); 42 modified = true; 43 } 44 break; 45 default: 46 break; 47 } 48 }); 49 return modified ? Status::SuccessWithChange : Status::SuccessWithoutChange; 50 } 51 52 } // namespace opt 53 } // namespace spvtools 54