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// Copyright (c) 2016 Google Inc.
//
// 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/freeze_spec_constant_value_pass.h"
#include "source/opt/ir_context.h"
namespace spvtools {
namespace opt {
Pass::Status FreezeSpecConstantValuePass::Process() {
bool modified = false;
auto ctx = context();
ctx->module()->ForEachInst([&modified, ctx](Instruction* inst) {
switch (inst->opcode()) {
case spv::Op::OpSpecConstant:
inst->SetOpcode(spv::Op::OpConstant);
modified = true;
break;
case spv::Op::OpSpecConstantTrue:
inst->SetOpcode(spv::Op::OpConstantTrue);
modified = true;
break;
case spv::Op::OpSpecConstantFalse:
inst->SetOpcode(spv::Op::OpConstantFalse);
modified = true;
break;
case spv::Op::OpDecorate:
if (spv::Decoration(inst->GetSingleWordInOperand(1)) ==
spv::Decoration::SpecId) {
ctx->KillInst(inst);
modified = true;
}
break;
default:
break;
}
});
return modified ? Status::SuccessWithChange : Status::SuccessWithoutChange;
}
} // namespace opt
} // namespace spvtools
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