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
18namespace spvtools {
19namespace opt {
20
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 SpvOp::SpvOpSpecConstant:
27 inst->SetOpcode(SpvOp::SpvOpConstant);
28 modified = true;
29 break;
30 case SpvOp::SpvOpSpecConstantTrue:
31 inst->SetOpcode(SpvOp::SpvOpConstantTrue);
32 modified = true;
33 break;
34 case SpvOp::SpvOpSpecConstantFalse:
35 inst->SetOpcode(SpvOp::SpvOpConstantFalse);
36 modified = true;
37 break;
38 case SpvOp::SpvOpDecorate:
39 if (inst->GetSingleWordInOperand(1) ==
40 SpvDecoration::SpvDecorationSpecId) {
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