1 //===- LoongArchTargetTransformInfo.h - LoongArch specific TTI --*- C++ -*-===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 /// \file 9 /// This file a TargetTransformInfoImplBase conforming object specific to the 10 /// LoongArch target machine. It uses the target's detailed information to 11 /// provide more precise answers to certain TTI queries, while letting the 12 /// target independent and default TTI implementations handle the rest. 13 /// 14 //===----------------------------------------------------------------------===// 15 16 #ifndef LLVM_LIB_TARGET_LOONGARCH_LOONGARCHTARGETTRANSFORMINFO_H 17 #define LLVM_LIB_TARGET_LOONGARCH_LOONGARCHTARGETTRANSFORMINFO_H 18 19 #include "LoongArchSubtarget.h" 20 #include "LoongArchTargetMachine.h" 21 #include "llvm/Analysis/TargetTransformInfo.h" 22 #include "llvm/CodeGen/BasicTTIImpl.h" 23 24 namespace llvm { 25 26 class LoongArchTTIImpl : public BasicTTIImplBase<LoongArchTTIImpl> { 27 typedef BasicTTIImplBase<LoongArchTTIImpl> BaseT; 28 typedef TargetTransformInfo TTI; 29 friend BaseT; 30 31 enum LoongArchRegisterClass { GPRRC, FPRRC, VRRC }; 32 const LoongArchSubtarget *ST; 33 const LoongArchTargetLowering *TLI; 34 getST()35 const LoongArchSubtarget *getST() const { return ST; } getTLI()36 const LoongArchTargetLowering *getTLI() const { return TLI; } 37 38 public: LoongArchTTIImpl(const LoongArchTargetMachine * TM,const Function & F)39 explicit LoongArchTTIImpl(const LoongArchTargetMachine *TM, const Function &F) 40 : BaseT(TM, F.getDataLayout()), ST(TM->getSubtargetImpl(F)), 41 TLI(ST->getTargetLowering()) {} 42 43 TypeSize 44 getRegisterBitWidth(TargetTransformInfo::RegisterKind K) const override; 45 unsigned getNumberOfRegisters(unsigned ClassID) const override; 46 unsigned getRegisterClassForType(bool Vector, 47 Type *Ty = nullptr) const override; 48 unsigned getMaxInterleaveFactor(ElementCount VF) const override; 49 const char *getRegisterClassName(unsigned ClassID) const override; 50 TTI::PopcntSupportKind getPopcntSupport(unsigned TyWidth) const override; 51 52 unsigned getCacheLineSize() const override; 53 unsigned getPrefetchDistance() const override; 54 bool enableWritePrefetching() const override; 55 56 // TODO: Implement more hooks to provide TTI machinery for LoongArch. 57 }; 58 59 } // end namespace llvm 60 61 #endif // LLVM_LIB_TARGET_LOONGARCH_LOONGARCHTARGETTRANSFORMINFO_H 62