Subversion Repositories QNX 8.QNX8 LLVM/Clang compiler suite

//===-- Float2Int.h - Demote floating point ops to work on integers -------===//

//

// 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 file provides the Float2Int pass, which aims to demote floating

// point operations to work on integers, where that is losslessly possible.

//

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

#ifndef LLVM_TRANSFORMS_SCALAR_FLOAT2INT_H

#define LLVM_TRANSFORMS_SCALAR_FLOAT2INT_H

#include "llvm/ADT/EquivalenceClasses.h"

#include "llvm/ADT/MapVector.h"

#include "llvm/ADT/SetVector.h"

#include "llvm/IR/ConstantRange.h"

#include "llvm/IR/PassManager.h"

namespace llvm {

class DominatorTree;

class Function;

class Instruction;

class LLVMContext;

class Type;

class Value;

class Float2IntPass : public PassInfoMixin<Float2IntPass> {

public:

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

  // Glue for old PM.

  bool runImpl(Function &F, const DominatorTree &DT);

private:

  void findRoots(Function &F, const DominatorTree &DT);

  void seen(Instruction *I, ConstantRange R);

  ConstantRange badRange();

  ConstantRange unknownRange();

  ConstantRange validateRange(ConstantRange R);

  std::optional<ConstantRange> calcRange(Instruction *I);

  void walkBackwards();

  void walkForwards();

  bool validateAndTransform();

  Value *convert(Instruction *I, Type *ToTy);

  void cleanup();

  MapVector<Instruction *, ConstantRange> SeenInsts;

  SmallSetVector<Instruction *, 8> Roots;

  EquivalenceClasses<Instruction *> ECs;

  MapVector<Instruction *, Value *> ConvertedInsts;

  LLVMContext *Ctx;

};

}

#endif // LLVM_TRANSFORMS_SCALAR_FLOAT2INT_H