1 //===-- SystemZTargetTransformInfo.h - SystemZ-specific TTI ---------------===//
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 
9 #ifndef LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZTARGETTRANSFORMINFO_H
10 #define LLVM_LIB_TARGET_SYSTEMZ_SYSTEMZTARGETTRANSFORMINFO_H
11 
12 #include "SystemZTargetMachine.h"
13 #include "llvm/Analysis/TargetTransformInfo.h"
14 #include "llvm/CodeGen/BasicTTIImpl.h"
15 
16 namespace llvm {
17 
18 class SystemZTTIImpl : public BasicTTIImplBase<SystemZTTIImpl> {
19   typedef BasicTTIImplBase<SystemZTTIImpl> BaseT;
20   typedef TargetTransformInfo TTI;
21   friend BaseT;
22 
23   const SystemZSubtarget *ST;
24   const SystemZTargetLowering *TLI;
25 
26   const SystemZSubtarget *getST() const { return ST; }
27   const SystemZTargetLowering *getTLI() const { return TLI; }
28 
29   unsigned const LIBCALL_COST = 30;
30 
31 public:
32   explicit SystemZTTIImpl(const SystemZTargetMachine *TM, const Function &F)
33       : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)),
34         TLI(ST->getTargetLowering()) {}
35 
36   /// \name Scalar TTI Implementations
37   /// @{
38 
39   unsigned getInliningThresholdMultiplier() { return 3; }
40   unsigned adjustInliningThreshold(const CallBase *CB) const;
41 
42   InstructionCost getIntImmCost(const APInt &Imm, Type *Ty,
43                                 TTI::TargetCostKind CostKind);
44 
45   InstructionCost getIntImmCostInst(unsigned Opcode, unsigned Idx,
46                                     const APInt &Imm, Type *Ty,
47                                     TTI::TargetCostKind CostKind,
48                                     Instruction *Inst = nullptr);
49   InstructionCost getIntImmCostIntrin(Intrinsic::ID IID, unsigned Idx,
50                                       const APInt &Imm, Type *Ty,
51                                       TTI::TargetCostKind CostKind);
52 
53   TTI::PopcntSupportKind getPopcntSupport(unsigned TyWidth);
54 
55   void getUnrollingPreferences(Loop *L, ScalarEvolution &SE,
56                                TTI::UnrollingPreferences &UP,
57                                OptimizationRemarkEmitter *ORE);
58 
59   void getPeelingPreferences(Loop *L, ScalarEvolution &SE,
60                              TTI::PeelingPreferences &PP);
61 
62   bool isLSRCostLess(const TargetTransformInfo::LSRCost &C1,
63                      const TargetTransformInfo::LSRCost &C2);
64   /// @}
65 
66   /// \name Vector TTI Implementations
67   /// @{
68 
69   unsigned getNumberOfRegisters(unsigned ClassID) const;
70   TypeSize getRegisterBitWidth(TargetTransformInfo::RegisterKind K) const;
71 
72   unsigned getCacheLineSize() const override { return 256; }
73   unsigned getPrefetchDistance() const override { return 4500; }
74   unsigned getMinPrefetchStride(unsigned NumMemAccesses,
75                                 unsigned NumStridedMemAccesses,
76                                 unsigned NumPrefetches,
77                                 bool HasCall) const override;
78   bool enableWritePrefetching() const override { return true; }
79 
80   bool hasDivRemOp(Type *DataType, bool IsSigned);
81   bool prefersVectorizedAddressing() { return false; }
82   bool LSRWithInstrQueries() { return true; }
83   bool supportsEfficientVectorElementLoadStore() { return true; }
84   bool enableInterleavedAccessVectorization() { return true; }
85 
86   InstructionCost getArithmeticInstrCost(
87       unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
88       TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
89       TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
90       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
91       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
92       ArrayRef<const Value *> Args = ArrayRef<const Value *>(),
93       const Instruction *CxtI = nullptr);
94   InstructionCost getShuffleCost(TTI::ShuffleKind Kind, VectorType *Tp,
95                                  ArrayRef<int> Mask, int Index,
96                                  VectorType *SubTp,
97                                  ArrayRef<const Value *> Args = None);
98   unsigned getVectorTruncCost(Type *SrcTy, Type *DstTy);
99   unsigned getVectorBitmaskConversionCost(Type *SrcTy, Type *DstTy);
100   unsigned getBoolVecToIntConversionCost(unsigned Opcode, Type *Dst,
101                                          const Instruction *I);
102   InstructionCost getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src,
103                                    TTI::CastContextHint CCH,
104                                    TTI::TargetCostKind CostKind,
105                                    const Instruction *I = nullptr);
106   InstructionCost getCmpSelInstrCost(unsigned Opcode, Type *ValTy, Type *CondTy,
107                                      CmpInst::Predicate VecPred,
108                                      TTI::TargetCostKind CostKind,
109                                      const Instruction *I = nullptr);
110   InstructionCost getVectorInstrCost(unsigned Opcode, Type *Val,
111                                      unsigned Index);
112   bool isFoldableLoad(const LoadInst *Ld, const Instruction *&FoldedValue);
113   InstructionCost getMemoryOpCost(unsigned Opcode, Type *Src,
114                                   MaybeAlign Alignment, unsigned AddressSpace,
115                                   TTI::TargetCostKind CostKind,
116                                   const Instruction *I = nullptr);
117 
118   InstructionCost getInterleavedMemoryOpCost(
119       unsigned Opcode, Type *VecTy, unsigned Factor, ArrayRef<unsigned> Indices,
120       Align Alignment, unsigned AddressSpace, TTI::TargetCostKind CostKind,
121       bool UseMaskForCond = false, bool UseMaskForGaps = false);
122 
123   InstructionCost getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
124                                         TTI::TargetCostKind CostKind);
125   /// @}
126 };
127 
128 } // end namespace llvm
129 
130 #endif
131