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 22 namespace spvtools { 23 namespace 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. 32 class DecomposeInitializedVariablesPass : public Pass { 33 public: name()34 const char* name() const override { 35 return "decompose-initialized-variables"; 36 } 37 Status Process() override; 38 GetPreservedAnalyses()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