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_SPLIT_INVALID_UNREACHABLE_PASS_H_
16#define SOURCE_OPT_SPLIT_INVALID_UNREACHABLE_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// Attempts to legalize for WebGPU by splitting up invalid unreachable blocks.
26// Specifically, looking for cases of unreachable merge-blocks and
27// continue-targets that are used more then once, which is illegal in WebGPU.
28class SplitInvalidUnreachablePass : public Pass {
29 public:
30 const char* name() const override { return "split-invalid-unreachable"; }
31 Status Process() override;
32
33 IRContext::Analysis GetPreservedAnalyses() override {
34 return IRContext::kAnalysisInstrToBlockMapping |
35 IRContext::kAnalysisDecorations | IRContext::kAnalysisCombinators |
36 IRContext::kAnalysisCFG | IRContext::kAnalysisDominatorAnalysis |
37 IRContext::kAnalysisLoopAnalysis | IRContext::kAnalysisNameMap |
38 IRContext::kAnalysisScalarEvolution |
39 IRContext::kAnalysisRegisterPressure |
40 IRContext::kAnalysisValueNumberTable |
41 IRContext::kAnalysisStructuredCFG |
42 IRContext::kAnalysisBuiltinVarId |
43 IRContext::kAnalysisIdToFuncMapping | IRContext::kAnalysisTypes |
44 IRContext::kAnalysisDefUse | IRContext::kAnalysisConstants;
45 }
46};
47
48} // namespace opt
49} // namespace spvtools
50
51#endif // SOURCE_OPT_SPLIT_INVALID_UNREACHABLE_PASS_H_
52