1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
//===-- LanaiTargetTransformInfo.h - Lanai specific TTI ---------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file a TargetTransformInfo::Concept conforming object specific to the
// Lanai target machine. It uses the target's detailed information to
// provide more precise answers to certain TTI queries, while letting the
// target independent and default TTI implementations handle the rest.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_LANAI_LANAITARGETTRANSFORMINFO_H
#define LLVM_LIB_TARGET_LANAI_LANAITARGETTRANSFORMINFO_H
#include "Lanai.h"
#include "LanaiSubtarget.h"
#include "LanaiTargetMachine.h"
#include "llvm/Analysis/TargetTransformInfo.h"
#include "llvm/CodeGen/BasicTTIImpl.h"
#include "llvm/CodeGen/TargetLowering.h"
#include "llvm/Support/MathExtras.h"
namespace llvm {
class LanaiTTIImpl : public BasicTTIImplBase<LanaiTTIImpl> {
typedef BasicTTIImplBase<LanaiTTIImpl> BaseT;
typedef TargetTransformInfo TTI;
friend BaseT;
const LanaiSubtarget *ST;
const LanaiTargetLowering *TLI;
const LanaiSubtarget *getST() const { return ST; }
const LanaiTargetLowering *getTLI() const { return TLI; }
public:
explicit LanaiTTIImpl(const LanaiTargetMachine *TM, const Function &F)
: BaseT(TM, F.getParent()->getDataLayout()), ST(TM->getSubtargetImpl(F)),
TLI(ST->getTargetLowering()) {}
bool shouldBuildLookupTables() const { return false; }
TargetTransformInfo::PopcntSupportKind getPopcntSupport(unsigned TyWidth) {
if (TyWidth == 32)
return TTI::PSK_FastHardware;
return TTI::PSK_Software;
}
int getIntImmCost(const APInt &Imm, Type *Ty) {
assert(Ty->isIntegerTy());
if (Imm == 0)
return TTI::TCC_Free;
if (isInt<16>(Imm.getSExtValue()))
return TTI::TCC_Basic;
if (isInt<21>(Imm.getZExtValue()))
return TTI::TCC_Basic;
if (isInt<32>(Imm.getSExtValue())) {
if ((Imm.getSExtValue() & 0xFFFF) == 0)
return TTI::TCC_Basic;
return 2 * TTI::TCC_Basic;
}
return 4 * TTI::TCC_Basic;
}
int getIntImmCost(unsigned Opc, unsigned Idx, const APInt &Imm, Type *Ty) {
return getIntImmCost(Imm, Ty);
}
int getIntImmCost(Intrinsic::ID IID, unsigned Idx, const APInt &Imm,
Type *Ty) {
return getIntImmCost(Imm, Ty);
}
unsigned getArithmeticInstrCost(
unsigned Opcode, Type *Ty,
TTI::OperandValueKind Opd1Info = TTI::OK_AnyValue,
TTI::OperandValueKind Opd2Info = TTI::OK_AnyValue,
TTI::OperandValueProperties Opd1PropInfo = TTI::OP_None,
TTI::OperandValueProperties Opd2PropInfo = TTI::OP_None,
ArrayRef<const Value *> Args = ArrayRef<const Value *>()) {
int ISD = TLI->InstructionOpcodeToISD(Opcode);
switch (ISD) {
default:
return BaseT::getArithmeticInstrCost(Opcode, Ty, Opd1Info, Opd2Info,
Opd1PropInfo, Opd2PropInfo);
case ISD::MUL:
case ISD::SDIV:
case ISD::UDIV:
case ISD::UREM:
// This increases the cost associated with multiplication and division
// to 64 times what the baseline arithmetic cost is. The arithmetic
// instruction cost was arbitrarily chosen to reduce the desirability
// of emitting arithmetic instructions that are emulated in software.
// TODO: Investigate the performance impact given specialized lowerings.
return 64 * BaseT::getArithmeticInstrCost(Opcode, Ty, Opd1Info, Opd2Info,
Opd1PropInfo, Opd2PropInfo);
}
}
};
} // end namespace llvm
#endif // LLVM_LIB_TARGET_LANAI_LANAITARGETTRANSFORMINFO_H
|
