llvm/llvm/lib/Analysis/CmpInstAnalysis.cpp

//===- CmpInstAnalysis.cpp - Utils to help fold compares ---------------===//
//
// 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 holds routines to help analyse compare instructions
// and fold them into constants or other compare instructions
//
//===----------------------------------------------------------------------===//

#include "llvm/Analysis/CmpInstAnalysis.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/Instructions.h"
#include "llvm/IR/PatternMatch.h"

usingnamespacellvm;

unsigned llvm::getICmpCode(CmpInst::Predicate Pred) { … }

Constant *llvm::getPredForICmpCode(unsigned Code, bool Sign, Type *OpTy,
                                   CmpInst::Predicate &Pred) { … }

bool llvm::predicatesFoldable(ICmpInst::Predicate P1, ICmpInst::Predicate P2) { … }

Constant *llvm::getPredForFCmpCode(unsigned Code, Type *OpTy,
                                   CmpInst::Predicate &Pred) { … }

bool llvm::decomposeBitTestICmp(Value *LHS, Value *RHS,
                                CmpInst::Predicate &Pred,
                                Value *&X, APInt &Mask, bool LookThruTrunc) { … }