1// Copyright (c) 2019 Google LLC.
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#ifndef SOURCE_OPT_DECOMPOSE_INITALIZED_VAIRABLES_PASS_H_
16#define SOURCE_OPT_DECOMPOSE_INITALIZED_VAIRABLES_PASS_H_
17
18#include "source/opt/ir_context.h"
19#include "source/opt/module.h"
20#include "source/opt/pass.h"
21
22namespace spvtools {
23namespace opt {
24
25// Converts variable declartions with initializers into seperate declaration and
26// assignment statements. This is done due to known issues with some Vulkan
27// implementations' handling of initialized variables.
28//
29// Only decomposes variables with storage classes that are valid in Vulkan
30// execution environments; Output, Private, and Function.
31// Currently only Function is implemented.
32class DecomposeInitializedVariablesPass : public Pass {
33 public:
34 const char* name() const override {
35 return "decompose-initialized-variables";
36 }
37 Status Process() override;
38
39 IRContext::Analysis GetPreservedAnalyses() override {
40 return IRContext::kAnalysisInstrToBlockMapping |
41 IRContext::kAnalysisDecorations | IRContext::kAnalysisCombinators |
42 IRContext::kAnalysisCFG | IRContext::kAnalysisDominatorAnalysis |
43 IRContext::kAnalysisLoopAnalysis | IRContext::kAnalysisNameMap |
44 IRContext::kAnalysisScalarEvolution |
45 IRContext::kAnalysisRegisterPressure |
46 IRContext::kAnalysisValueNumberTable |
47 IRContext::kAnalysisStructuredCFG |
48 IRContext::kAnalysisBuiltinVarId |
49 IRContext::kAnalysisIdToFuncMapping | IRContext::kAnalysisTypes |
50 IRContext::kAnalysisDefUse | IRContext::kAnalysisConstants;
51 }
52};
53
54} // namespace opt
55} // namespace spvtools
56
57#endif // SOURCE_OPT_DECOMPOSE_INITALIZED_VAIRABLES_PASS_H_
58