1//===-- NVPTXTargetTransformInfo.h - NVPTX specific TTI ---------*- C++ -*-===// 2// 3// The LLVM Compiler Infrastructure 4// 5// This file is distributed under the University of Illinois Open Source 6// License. See LICENSE.TXT for details. 7// 8//===----------------------------------------------------------------------===// 9/// \file 10/// This file a TargetTransformInfo::Concept conforming object specific to the 11/// NVPTX target machine. It uses the target's detailed information to 12/// provide more precise answers to certain TTI queries, while letting the 13/// target independent and default TTI implementations handle the rest. 14/// 15//===----------------------------------------------------------------------===// 16 17#ifndef LLVM_LIB_TARGET_NVPTX_NVPTXTARGETTRANSFORMINFO_H 18#define LLVM_LIB_TARGET_NVPTX_NVPTXTARGETTRANSFORMINFO_H 19 20#include "NVPTX.h" 21#include "NVPTXTargetMachine.h" 22#include "llvm/Analysis/TargetTransformInfo.h" 23#include "llvm/CodeGen/BasicTTIImpl.h" 24#include "llvm/Target/TargetLowering.h" 25 26namespace llvm { 27 28class NVPTXTTIImpl : public BasicTTIImplBase<NVPTXTTIImpl> { 29 typedef BasicTTIImplBase<NVPTXTTIImpl> BaseT; 30 typedef TargetTransformInfo TTI; 31 friend BaseT; 32 33 const NVPTXSubtarget *ST; 34 const NVPTXTargetLowering *TLI; 35 36 const NVPTXSubtarget *getST() const { return ST; }; 37 const NVPTXTargetLowering *getTLI() const { return TLI; }; 38 39public: 40 explicit NVPTXTTIImpl(const NVPTXTargetMachine *TM, const Function &F) 41 : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl()), 42 TLI(ST->getTargetLowering()) {} 43 44 // Provide value semantics. MSVC requires that we spell all of these out. 45 NVPTXTTIImpl(const NVPTXTTIImpl &Arg) 46 : BaseT(static_cast<const BaseT &>(Arg)), ST(Arg.ST), TLI(Arg.TLI) {} 47 NVPTXTTIImpl(NVPTXTTIImpl &&Arg) 48 : BaseT(std::move(static_cast<BaseT &>(Arg))), ST(std::move(Arg.ST)), 49 TLI(std::move(Arg.TLI)) {} 50 51 bool hasBranchDivergence() { return true; } 52 53 bool isSourceOfDivergence(const Value *V); 54 55 // Increase the inlining cost threshold by a factor of 5, reflecting that 56 // calls are particularly expensive in NVPTX. 57 unsigned getInliningThresholdMultiplier() { return 5; } 58 59 int getArithmeticInstrCost( 60 unsigned Opcode, Type *Ty, 61 TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue, 62 TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue, 63 TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None, 64 TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None); 65 66 void getUnrollingPreferences(Loop *L, TTI::UnrollingPreferences &UP); 67}; 68 69} // end namespace llvm 70 71#endif 72