| //===- SimplifyCFG.h - Simplify and canonicalize the CFG --------*- C++ -*-===// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| /// \file |
| /// This file provides the interface for the pass responsible for both |
| /// simplifying and canonicalizing the CFG. |
| /// |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_TRANSFORMS_SCALAR_SIMPLIFYCFG_H |
| #define LLVM_TRANSFORMS_SCALAR_SIMPLIFYCFG_H |
| |
| #include "llvm/IR/Function.h" |
| #include "llvm/IR/PassManager.h" |
| |
| namespace llvm { |
| |
| /// \brief A pass to simplify and canonicalize the CFG of a function. |
| /// |
| /// This pass iteratively simplifies the entire CFG of a function, removing |
| /// unnecessary control flows and bringing it into the canonical form expected |
| /// by the rest of the mid-level optimizer. |
| class SimplifyCFGPass : public PassInfoMixin<SimplifyCFGPass> { |
| int BonusInstThreshold; |
| bool LateSimplifyCFG; |
| |
| public: |
| /// \brief Construct a pass with the default thresholds |
| /// and switch optimizations. |
| SimplifyCFGPass(); |
| |
| /// \brief Construct a pass with a specific bonus threshold |
| /// and optional switch optimizations. |
| SimplifyCFGPass(int BonusInstThreshold, bool LateSimplifyCFG); |
| |
| /// \brief Run the pass over the function. |
| PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM); |
| }; |
| |
| } |
| |
| #endif |