| // Copyright (c) 2019 Google LLC |
| // |
| // 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. |
| |
| #ifndef SOURCE_OPT_FIX_STORAGE_CLASS_H_ |
| #define SOURCE_OPT_FIX_STORAGE_CLASS_H_ |
| |
| #include <unordered_map> |
| |
| #include "source/opt/ir_context.h" |
| #include "source/opt/module.h" |
| #include "source/opt/pass.h" |
| |
| namespace spvtools { |
| namespace opt { |
| |
| // This pass tries to fix validation error due to a mismatch of storage classes |
| // in instructions. There is no guarantee that all such error will be fixed, |
| // and it is possible that in fixing these errors, it could lead to other |
| // errors. |
| class FixStorageClass : public Pass { |
| public: |
| const char* name() const override { return "fix-storage-class"; } |
| Status Process() override; |
| |
| // Return the mask of preserved Analyses. |
| IRContext::Analysis GetPreservedAnalyses() override { |
| return IRContext::kAnalysisDefUse | |
| IRContext::kAnalysisInstrToBlockMapping | |
| IRContext::kAnalysisCombinators | IRContext::kAnalysisCFG | |
| IRContext::kAnalysisDominatorAnalysis | |
| IRContext::kAnalysisLoopAnalysis | IRContext::kAnalysisNameMap | |
| IRContext::kAnalysisConstants | IRContext::kAnalysisTypes; |
| } |
| |
| private: |
| // Changes the storage class of the result of |inst| to |storage_class| in |
| // appropriate, and propagates the change to the users of |inst| as well. |
| // Returns true of any changes were made. |
| // |seen| is used to track OpPhi instructions that should not be processed. |
| bool PropagateStorageClass(Instruction* inst, SpvStorageClass storage_class, |
| std::set<uint32_t>* seen); |
| |
| // Changes the storage class of the result of |inst| to |storage_class|. |
| // Is it assumed that the result type of |inst| is a pointer type. |
| // Propagates the change to the users of |inst| as well. |
| // Returns true of any changes were made. |
| // |seen| is used to track OpPhi instructions that should not be processed by |
| // |PropagateStorageClass| |
| void FixInstructionStorageClass(Instruction* inst, |
| SpvStorageClass storage_class, |
| std::set<uint32_t>* seen); |
| |
| // Changes the storage class of the result of |inst| to |storage_class|. The |
| // result type of |inst| must be a pointer. |
| void ChangeResultStorageClass(Instruction* inst, |
| SpvStorageClass storage_class) const; |
| |
| // Returns true if the result type of |inst| is a pointer. |
| bool IsPointerResultType(Instruction* inst); |
| |
| // Returns true if the result of |inst| is a pointer to storage class |
| // |storage_class|. |
| bool IsPointerToStorageClass(Instruction* inst, |
| SpvStorageClass storage_class); |
| |
| // Change |inst| to match that operand |op_idx| now has type |type_id|, and |
| // adjust any uses of |inst| accordingly. Returns true if the code changed. |
| bool PropagateType(Instruction* inst, uint32_t type_id, uint32_t op_idx, |
| std::set<uint32_t>* seen); |
| |
| // Changes the result type of |inst| to |new_type_id|. |
| bool ChangeResultType(Instruction* inst, uint32_t new_type_id); |
| |
| // Returns the type id of the member of the type |id| that would be returned |
| // by following the indices of the access chain instruction |inst|. |
| uint32_t WalkAccessChainType(Instruction* inst, uint32_t id); |
| }; |
| |
| } // namespace opt |
| } // namespace spvtools |
| |
| #endif // SOURCE_OPT_FIX_STORAGE_CLASS_H_ |