Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===- SCCP.cpp - Sparse Conditional Constant Propagation -------*- 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

//

//===----------------------------------------------------------------------===//

//

// \file

// This file implements sparse conditional constant propagation and merging:

//

// Specifically, this:

//   * Assumes values are constant unless proven otherwise

//   * Assumes BasicBlocks are dead unless proven otherwise

//   * Proves values to be constant, and replaces them with constants

//   * Proves conditional branches to be unconditional

//

//===----------------------------------------------------------------------===//

#ifndef LLVM_TRANSFORMS_SCALAR_SCCP_H

#define LLVM_TRANSFORMS_SCALAR_SCCP_H

#include "llvm/ADT/STLFunctionalExtras.h"

#include "llvm/IR/PassManager.h"

#include <functional>

namespace llvm {

class AssumptionCache;

class DataLayout;

class Function;

class Module;

class TargetLibraryInfo;

class TargetTransformInfo;

struct AnalysisResultsForFn;

/// This pass performs function-level constant propagation and merging.

class SCCPPass : public PassInfoMixin<SCCPPass> {

public:

  PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);

};

} // end namespace llvm

#endif // LLVM_TRANSFORMS_SCALAR_SCCP_H