1//===-- PPCTargetTransformInfo.h - PPC 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 TargetTransformInfo::Concept conforming object specific to the
10/// PPC 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_POWERPC_PPCTARGETTRANSFORMINFO_H
17#define LLVM_LIB_TARGET_POWERPC_PPCTARGETTRANSFORMINFO_H
18
19#include "PPCTargetMachine.h"
20#include "llvm/Analysis/TargetTransformInfo.h"
21#include "llvm/CodeGen/BasicTTIImpl.h"
22#include "llvm/CodeGen/TargetLowering.h"
23#include <optional>
24
25namespace llvm {
26
27class PPCTTIImpl : public BasicTTIImplBase<PPCTTIImpl> {
28 typedef BasicTTIImplBase<PPCTTIImpl> BaseT;
29 typedef TargetTransformInfo TTI;
30 friend BaseT;
31
32 const PPCSubtarget *ST;
33 const PPCTargetLowering *TLI;
34
35 const PPCSubtarget *getST() const { return ST; }
36 const PPCTargetLowering *getTLI() const { return TLI; }
37
38public:
39 explicit PPCTTIImpl(const PPCTargetMachine *TM, const Function &F)
40 : BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)),
41 TLI(ST->getTargetLowering()) {}
42
43 std::optional<Instruction *> instCombineIntrinsic(InstCombiner & IC,
44 IntrinsicInst & II) const;
45
46 /// \name Scalar TTI Implementations
47 /// @{
48
49 using BaseT::getIntImmCost;
50 InstructionCost getIntImmCost(const APInt &Imm, Type *Ty,
51 TTI::TargetCostKind CostKind);
52
53 InstructionCost getIntImmCostInst(unsigned Opcode, unsigned Idx,
54 const APInt &Imm, Type *Ty,
55 TTI::TargetCostKind CostKind,
56 Instruction *Inst = nullptr);
57 InstructionCost getIntImmCostIntrin(Intrinsic::ID IID, unsigned Idx,
58 const APInt &Imm, Type *Ty,
59 TTI::TargetCostKind CostKind);
60
61 InstructionCost getInstructionCost(const User *U,
62 ArrayRef<const Value *> Operands,
63 TTI::TargetCostKind CostKind);
64
65 TTI::PopcntSupportKind getPopcntSupport(unsigned TyWidth);
66 bool isHardwareLoopProfitable(Loop *L, ScalarEvolution &SE,
67 AssumptionCache &AC,
68 TargetLibraryInfo *LibInfo,
69 HardwareLoopInfo &HWLoopInfo);
70 bool canSaveCmp(Loop *L, BranchInst **BI, ScalarEvolution *SE, LoopInfo *LI,
71 DominatorTree *DT, AssumptionCache *AC,
72 TargetLibraryInfo *LibInfo);
73 bool getTgtMemIntrinsic(IntrinsicInst *Inst, MemIntrinsicInfo &Info);
74 void getUnrollingPreferences(Loop *L, ScalarEvolution &SE,
75 TTI::UnrollingPreferences &UP,
76 OptimizationRemarkEmitter *ORE);
77 void getPeelingPreferences(Loop *L, ScalarEvolution &SE,
78 TTI::PeelingPreferences &PP);
79 bool isLSRCostLess(const TargetTransformInfo::LSRCost &C1,
80 const TargetTransformInfo::LSRCost &C2);
81 bool isNumRegsMajorCostOfLSR();
82 bool shouldBuildRelLookupTables() const;
83 /// @}
84
85 /// \name Vector TTI Implementations
86 /// @{
87 bool useColdCCForColdCall(Function &F);
88 bool enableAggressiveInterleaving(bool LoopHasReductions);
89 TTI::MemCmpExpansionOptions enableMemCmpExpansion(bool OptSize,
90 bool IsZeroCmp) const;
91 bool enableInterleavedAccessVectorization();
92
93 enum PPCRegisterClass {
94 GPRRC, FPRRC, VRRC, VSXRC
95 };
96 unsigned getNumberOfRegisters(unsigned ClassID) const;
97 unsigned getRegisterClassForType(bool Vector, Type *Ty = nullptr) const;
98 const char* getRegisterClassName(unsigned ClassID) const;
99 TypeSize getRegisterBitWidth(TargetTransformInfo::RegisterKind K) const;
100 unsigned getCacheLineSize() const override;
101 unsigned getPrefetchDistance() const override;
102 unsigned getMaxInterleaveFactor(ElementCount VF);
103 InstructionCost vectorCostAdjustmentFactor(unsigned Opcode, Type *Ty1,
104 Type *Ty2);
105 InstructionCost getArithmeticInstrCost(
106 unsigned Opcode, Type *Ty, TTI::TargetCostKind CostKind,
107 TTI::OperandValueInfo Op1Info = {.Kind: .Kind: TTI::OK_AnyValue, .Properties: .Properties: TTI::OP_None},
108 TTI::OperandValueInfo Op2Info = {.Kind: .Kind: TTI::OK_AnyValue, .Properties: .Properties: TTI::OP_None},
109 ArrayRef<const Value *> Args = std::nullopt,
110 const Instruction *CxtI = nullptr);
111 InstructionCost getShuffleCost(TTI::ShuffleKind Kind, Type *Tp,
112 ArrayRef<int> Mask,
113 TTI::TargetCostKind CostKind, int Index,
114 Type *SubTp,
115 ArrayRef<const Value *> Args = std::nullopt,
116 const Instruction *CxtI = nullptr);
117 InstructionCost getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src,
118 TTI::CastContextHint CCH,
119 TTI::TargetCostKind CostKind,
120 const Instruction *I = nullptr);
121 InstructionCost getCFInstrCost(unsigned Opcode, TTI::TargetCostKind CostKind,
122 const Instruction *I = nullptr);
123 InstructionCost getCmpSelInstrCost(unsigned Opcode, Type *ValTy, Type *CondTy,
124 CmpInst::Predicate VecPred,
125 TTI::TargetCostKind CostKind,
126 const Instruction *I = nullptr);
127 using BaseT::getVectorInstrCost;
128 InstructionCost getVectorInstrCost(unsigned Opcode, Type *Val,
129 TTI::TargetCostKind CostKind,
130 unsigned Index, Value *Op0, Value *Op1);
131 InstructionCost
132 getMemoryOpCost(unsigned Opcode, Type *Src, MaybeAlign Alignment,
133 unsigned AddressSpace, TTI::TargetCostKind CostKind,
134 TTI::OperandValueInfo OpInfo = {.Kind: .Kind: TTI::OK_AnyValue, .Properties: .Properties: TTI::OP_None},
135 const Instruction *I = nullptr);
136 InstructionCost getInterleavedMemoryOpCost(
137 unsigned Opcode, Type *VecTy, unsigned Factor, ArrayRef<unsigned> Indices,
138 Align Alignment, unsigned AddressSpace, TTI::TargetCostKind CostKind,
139 bool UseMaskForCond = false, bool UseMaskForGaps = false);
140 InstructionCost getIntrinsicInstrCost(const IntrinsicCostAttributes &ICA,
141 TTI::TargetCostKind CostKind);
142 bool areTypesABICompatible(const Function *Caller, const Function *Callee,
143 const ArrayRef<Type *> &Types) const;
144 bool hasActiveVectorLength(unsigned Opcode, Type *DataType,
145 Align Alignment) const;
146 InstructionCost getVPMemoryOpCost(unsigned Opcode, Type *Src, Align Alignment,
147 unsigned AddressSpace,
148 TTI::TargetCostKind CostKind,
149 const Instruction *I = nullptr);
150 bool supportsTailCallFor(const CallBase *CB) const;
151
152private:
153 // The following constant is used for estimating costs on power9.
154 static const InstructionCost::CostType P9PipelineFlushEstimate = 80;
155
156 /// @}
157};
158
159} // end namespace llvm
160
161#endif
162

source code of llvm/lib/Target/PowerPC/PPCTargetTransformInfo.h