| //===-- UnifyFunctionExitNodes.h - Ensure fn's have one return --*- C++ -*-===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This pass is used to ensure that functions have at most one return and one |
| // unreachable instruction in them. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_TRANSFORMS_UTILS_UNIFYFUNCTIONEXITNODES_H |
| #define LLVM_TRANSFORMS_UTILS_UNIFYFUNCTIONEXITNODES_H |
| |
| #include "llvm/IR/PassManager.h" |
| #include "llvm/Pass.h" |
| |
| namespace llvm { |
| |
| class BasicBlock; |
| |
| class UnifyFunctionExitNodesLegacyPass : public FunctionPass { |
| public: |
| static char ID; // Pass identification, replacement for typeid |
| UnifyFunctionExitNodesLegacyPass(); |
| |
| // We can preserve non-critical-edgeness when we unify function exit nodes |
| void getAnalysisUsage(AnalysisUsage &AU) const override; |
| |
| bool runOnFunction(Function &F) override; |
| }; |
| |
| Pass *createUnifyFunctionExitNodesPass(); |
| |
| class UnifyFunctionExitNodesPass |
| : public PassInfoMixin<UnifyFunctionExitNodesPass> { |
| public: |
| PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM); |
| }; |
| |
| } // end namespace llvm |
| |
| #endif // LLVM_TRANSFORMS_UTILS_UNIFYFUNCTIONEXITNODES_H |