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//===-- Float2Int.h - Demote floating point ops to work on integers -------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// 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/IR/ConstantRange.h"
#include "llvm/IR/Function.h"
#include "llvm/IR/PassManager.h"
namespace llvm {
class Float2IntPass : public PassInfoMixin<Float2IntPass> {
public:
PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM);
// Glue for old PM.
bool runImpl(Function &F);
private:
void findRoots(Function &F, SmallPtrSet<Instruction *, 8> &Roots);
void seen(Instruction *I, ConstantRange R);
ConstantRange badRange();
ConstantRange unknownRange();
ConstantRange validateRange(ConstantRange R);
void walkBackwards(const SmallPtrSetImpl<Instruction *> &Roots);
void walkForwards();
bool validateAndTransform();
Value *convert(Instruction *I, Type *ToTy);
void cleanup();
MapVector<Instruction *, ConstantRange> SeenInsts;
SmallPtrSet<Instruction *, 8> Roots;
EquivalenceClasses<Instruction *> ECs;
MapVector<Instruction *, Value *> ConvertedInsts;
LLVMContext *Ctx;
};
}
#endif // LLVM_TRANSFORMS_SCALAR_FLOAT2INT_H
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