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//===- 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 {
int BonusInstThreshold;
public:
static StringRef name() { return "SimplifyCFGPass"; }
/// \brief Construct a pass with the default thresholds.
SimplifyCFGPass();
/// \brief Construct a pass with a specific bonus threshold.
SimplifyCFGPass(int BonusInstThreshold);
/// \brief Run the pass over the function.
PreservedAnalyses run(Function &F, AnalysisManager<Function> *AM);
};
}
#endif
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