1 //===-- ARMTargetTransformInfo.h - ARM 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 /// ARM 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_ARM_ARMTARGETTRANSFORMINFO_H
18 #define LLVM_LIB_TARGET_ARM_ARMTARGETTRANSFORMINFO_H
19 
20 #include "ARM.h"
21 #include "ARMTargetMachine.h"
22 #include "llvm/Analysis/TargetTransformInfo.h"
23 #include "llvm/CodeGen/BasicTTIImpl.h"
24 #include "llvm/Target/TargetLowering.h"
25 
26 namespace llvm {
27 
28 class ARMTTIImpl : public BasicTTIImplBase<ARMTTIImpl> {
29   typedef BasicTTIImplBase<ARMTTIImpl> BaseT;
30   typedef TargetTransformInfo TTI;
31   friend BaseT;
32 
33   const ARMSubtarget *ST;
34   const ARMTargetLowering *TLI;
35 
36   /// Estimate the overhead of scalarizing an instruction. Insert and Extract
37   /// are set if the result needs to be inserted and/or extracted from vectors.
38   unsigned getScalarizationOverhead(Type *Ty, bool Insert, bool Extract);
39 
getST()40   const ARMSubtarget *getST() const { return ST; }
getTLI()41   const ARMTargetLowering *getTLI() const { return TLI; }
42 
43 public:
ARMTTIImpl(const ARMBaseTargetMachine * TM,Function & F)44   explicit ARMTTIImpl(const ARMBaseTargetMachine *TM, Function &F)
45       : BaseT(TM), ST(TM->getSubtargetImpl(F)), TLI(ST->getTargetLowering()) {}
46 
47   // Provide value semantics. MSVC requires that we spell all of these out.
ARMTTIImpl(const ARMTTIImpl & Arg)48   ARMTTIImpl(const ARMTTIImpl &Arg)
49       : BaseT(static_cast<const BaseT &>(Arg)), ST(Arg.ST), TLI(Arg.TLI) {}
ARMTTIImpl(ARMTTIImpl && Arg)50   ARMTTIImpl(ARMTTIImpl &&Arg)
51       : BaseT(std::move(static_cast<BaseT &>(Arg))), ST(std::move(Arg.ST)),
52         TLI(std::move(Arg.TLI)) {}
53   ARMTTIImpl &operator=(const ARMTTIImpl &RHS) {
54     BaseT::operator=(static_cast<const BaseT &>(RHS));
55     ST = RHS.ST;
56     TLI = RHS.TLI;
57     return *this;
58   }
59   ARMTTIImpl &operator=(ARMTTIImpl &&RHS) {
60     BaseT::operator=(std::move(static_cast<BaseT &>(RHS)));
61     ST = std::move(RHS.ST);
62     TLI = std::move(RHS.TLI);
63     return *this;
64   }
65 
66   /// \name Scalar TTI Implementations
67   /// @{
68 
69   using BaseT::getIntImmCost;
70   unsigned getIntImmCost(const APInt &Imm, Type *Ty);
71 
72   /// @}
73 
74   /// \name Vector TTI Implementations
75   /// @{
76 
getNumberOfRegisters(bool Vector)77   unsigned getNumberOfRegisters(bool Vector) {
78     if (Vector) {
79       if (ST->hasNEON())
80         return 16;
81       return 0;
82     }
83 
84     if (ST->isThumb1Only())
85       return 8;
86     return 13;
87   }
88 
getRegisterBitWidth(bool Vector)89   unsigned getRegisterBitWidth(bool Vector) {
90     if (Vector) {
91       if (ST->hasNEON())
92         return 128;
93       return 0;
94     }
95 
96     return 32;
97   }
98 
getMaxInterleaveFactor()99   unsigned getMaxInterleaveFactor() {
100     // These are out of order CPUs:
101     if (ST->isCortexA15() || ST->isSwift())
102       return 2;
103     return 1;
104   }
105 
106   unsigned getShuffleCost(TTI::ShuffleKind Kind, Type *Tp, int Index,
107                           Type *SubTp);
108 
109   unsigned getCastInstrCost(unsigned Opcode, Type *Dst, Type *Src);
110 
111   unsigned getCmpSelInstrCost(unsigned Opcode, Type *ValTy, Type *CondTy);
112 
113   unsigned getVectorInstrCost(unsigned Opcode, Type *Val, unsigned Index);
114 
115   unsigned getAddressComputationCost(Type *Val, bool IsComplex);
116 
117   unsigned getFPOpCost(Type *Ty);
118 
119   unsigned getArithmeticInstrCost(
120       unsigned Opcode, Type *Ty,
121       TTI::OperandValueKind Op1Info = TTI::OK_AnyValue,
122       TTI::OperandValueKind Op2Info = TTI::OK_AnyValue,
123       TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
124       TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None);
125 
126   unsigned getMemoryOpCost(unsigned Opcode, Type *Src, unsigned Alignment,
127                            unsigned AddressSpace);
128 
129   /// @}
130 };
131 
132 } // end namespace llvm
133 
134 #endif
135