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//===------ BPFTargetTransformInfo.h - BPF specific TTI ---------*- 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
//
//===----------------------------------------------------------------------===//
//
// This file uses the target's specific information to
// provide more precise answers to certain TTI queries, while letting the
// target independent and default TTI implementations handle the rest.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_BPF_BPFTARGETTRANSFORMINFO_H
#define LLVM_LIB_TARGET_BPF_BPFTARGETTRANSFORMINFO_H
#include "BPFTargetMachine.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/CodeGen/BasicTTIImpl.h"
#include "llvm/Transforms/Utils/ScalarEvolutionExpander.h"
namespace llvm {
class BPFTTIImpl : public BasicTTIImplBase<BPFTTIImpl> {
typedef BasicTTIImplBase<BPFTTIImpl> BaseT;
typedef TargetTransformInfo TTI;
friend BaseT;
const BPFSubtarget *ST;
const BPFTargetLowering *TLI;
const BPFSubtarget *getST() const { return ST; }
const BPFTargetLowering *getTLI() const { return TLI; }
public:
explicit BPFTTIImpl(const BPFTargetMachine *TM, const Function &F)
: BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)),
TLI(ST->getTargetLowering()) {}
int getIntImmCost(const APInt &Imm, Type *Ty, TTI::TargetCostKind CostKind) {
if (Imm.getBitWidth() <= 64 && isInt<32>(Imm.getSExtValue()))
return TTI::TCC_Free;
return TTI::TCC_Basic;
}
int getCmpSelInstrCost(unsigned Opcode, Type *ValTy, Type *CondTy,
CmpInst::Predicate VecPred,
TTI::TargetCostKind CostKind,
const llvm::Instruction *I = nullptr) {
if (Opcode == Instruction::Select)
return SCEVCheapExpansionBudget;
return BaseT::getCmpSelInstrCost(Opcode, ValTy, CondTy, VecPred, CostKind,
I);
}
};
} // end namespace llvm
#endif // LLVM_LIB_TARGET_BPF_BPFTARGETTRANSFORMINFO_H
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