Yi Kong | 4e9417d | 2022-10-12 11:48:30 +0900 | [diff] [blame^] | 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_WRAP_OPKILL_H_ |
| 16 | #define SOURCE_OPT_WRAP_OPKILL_H_ |
| 17 | |
| 18 | #include "source/opt/pass.h" |
| 19 | |
| 20 | namespace spvtools { |
| 21 | namespace opt { |
| 22 | |
| 23 | // Documented in optimizer.hpp |
| 24 | class WrapOpKill : public Pass { |
| 25 | public: |
| 26 | WrapOpKill() : void_type_id_(0) {} |
| 27 | |
| 28 | const char* name() const override { return "wrap-opkill"; } |
| 29 | |
| 30 | Status Process() override; |
| 31 | |
| 32 | IRContext::Analysis GetPreservedAnalyses() override { |
| 33 | return IRContext::kAnalysisDefUse | |
| 34 | IRContext::kAnalysisInstrToBlockMapping | |
| 35 | IRContext::kAnalysisDecorations | IRContext::kAnalysisCombinators | |
| 36 | IRContext::kAnalysisNameMap | IRContext::kAnalysisBuiltinVarId | |
| 37 | IRContext::kAnalysisConstants | IRContext::kAnalysisTypes; |
| 38 | } |
| 39 | |
| 40 | private: |
| 41 | // Replaces the OpKill or OpTerminateInvocation instruction |inst| with a |
| 42 | // function call to a function that contains a single instruction, a clone of |
| 43 | // |inst|. An OpUnreachable instruction will be placed after the function |
| 44 | // call. Return true if successful. |
| 45 | bool ReplaceWithFunctionCall(Instruction* inst); |
| 46 | |
| 47 | // Returns the id of the void type. |
| 48 | uint32_t GetVoidTypeId(); |
| 49 | |
| 50 | // Returns the id of the function type for a void function with no parameters. |
| 51 | uint32_t GetVoidFunctionTypeId(); |
| 52 | |
| 53 | // Return the id of a function that has return type void, has no parameters, |
| 54 | // and contains a single instruction, which is |opcode|, either OpKill or |
| 55 | // OpTerminateInvocation. Returns 0 if the function could not be generated. |
| 56 | uint32_t GetKillingFuncId(SpvOp opcode); |
| 57 | |
| 58 | // Returns the id of the return type for the function that contains |inst|. |
| 59 | // Returns 0 if |inst| is not in a function. |
| 60 | uint32_t GetOwningFunctionsReturnType(Instruction* inst); |
| 61 | |
| 62 | // The id of the void type. If its value is 0, then the void type has not |
| 63 | // been found or created yet. |
| 64 | uint32_t void_type_id_; |
| 65 | |
| 66 | // The function that is a single instruction, which is an OpKill. The |
| 67 | // function has a void return type and takes no parameters. If the function is |
| 68 | // |nullptr|, then the function has not been generated. |
| 69 | std::unique_ptr<Function> opkill_function_; |
| 70 | // The function that is a single instruction, which is an |
| 71 | // OpTerminateInvocation. The function has a void return type and takes no |
| 72 | // parameters. If the function is |nullptr|, then the function has not been |
| 73 | // generated. |
| 74 | std::unique_ptr<Function> opterminateinvocation_function_; |
| 75 | }; |
| 76 | |
| 77 | } // namespace opt |
| 78 | } // namespace spvtools |
| 79 | |
| 80 | #endif // SOURCE_OPT_WRAP_OPKILL_H_ |