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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
//===---------------- llvm/CodeGen/MatchContext.h --------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// This file declares the EmptyMatchContext class and VPMatchContext class.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_CODEGEN_SELECTIONDAG_MATCHCONTEXT_H
#define LLVM_LIB_CODEGEN_SELECTIONDAG_MATCHCONTEXT_H
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/TargetLowering.h"
using namespace llvm;
namespace {
class EmptyMatchContext {
SelectionDAG &DAG;
const TargetLowering &TLI;
SDNode *Root;
public:
EmptyMatchContext(SelectionDAG &DAG, const TargetLowering &TLI, SDNode *Root)
: DAG(DAG), TLI(TLI), Root(Root) {}
unsigned getRootBaseOpcode() { return Root->getOpcode(); }
bool match(SDValue OpN, unsigned Opcode) const {
return Opcode == OpN->getOpcode();
}
// Same as SelectionDAG::getNode().
template <typename... ArgT> SDValue getNode(ArgT &&...Args) {
return DAG.getNode(std::forward<ArgT>(Args)...);
}
bool isOperationLegal(unsigned Op, EVT VT) const {
return TLI.isOperationLegal(Op, VT);
}
bool isOperationLegalOrCustom(unsigned Op, EVT VT,
bool LegalOnly = false) const {
return TLI.isOperationLegalOrCustom(Op, VT, LegalOnly);
}
};
class VPMatchContext {
SelectionDAG &DAG;
const TargetLowering &TLI;
SDValue RootMaskOp;
SDValue RootVectorLenOp;
SDNode *Root;
public:
VPMatchContext(SelectionDAG &DAG, const TargetLowering &TLI, SDNode *_Root)
: DAG(DAG), TLI(TLI), RootMaskOp(), RootVectorLenOp() {
Root = _Root;
assert(Root->isVPOpcode());
if (auto RootMaskPos = ISD::getVPMaskIdx(Root->getOpcode()))
RootMaskOp = Root->getOperand(*RootMaskPos);
else if (Root->getOpcode() == ISD::VP_SELECT)
RootMaskOp = DAG.getAllOnesConstant(SDLoc(Root),
Root->getOperand(0).getValueType());
if (auto RootVLenPos = ISD::getVPExplicitVectorLengthIdx(Root->getOpcode()))
RootVectorLenOp = Root->getOperand(*RootVLenPos);
}
unsigned getRootBaseOpcode() {
std::optional<unsigned> Opcode = ISD::getBaseOpcodeForVP(
Root->getOpcode(), !Root->getFlags().hasNoFPExcept());
assert(Opcode.has_value());
return *Opcode;
}
/// whether \p OpVal is a node that is functionally compatible with the
/// NodeType \p Opc
bool match(SDValue OpVal, unsigned Opc) const {
if (!OpVal->isVPOpcode())
return OpVal->getOpcode() == Opc;
auto BaseOpc = ISD::getBaseOpcodeForVP(OpVal->getOpcode(),
!OpVal->getFlags().hasNoFPExcept());
if (BaseOpc != Opc)
return false;
// Make sure the mask of OpVal is true mask or is same as Root's.
unsigned VPOpcode = OpVal->getOpcode();
if (auto MaskPos = ISD::getVPMaskIdx(VPOpcode)) {
SDValue MaskOp = OpVal.getOperand(*MaskPos);
if (RootMaskOp != MaskOp &&
!ISD::isConstantSplatVectorAllOnes(MaskOp.getNode()))
return false;
}
// Make sure the EVL of OpVal is same as Root's.
if (auto VLenPos = ISD::getVPExplicitVectorLengthIdx(VPOpcode))
if (RootVectorLenOp != OpVal.getOperand(*VLenPos))
return false;
return true;
}
// Specialize based on number of operands.
// TODO emit VP intrinsics where MaskOp/VectorLenOp != null
// SDValue getNode(unsigned Opcode, const SDLoc &DL, EVT VT) { return
// DAG.getNode(Opcode, DL, VT); }
SDValue getNode(unsigned Opcode, const SDLoc &DL, EVT VT, SDValue Operand) {
unsigned VPOpcode = ISD::getVPForBaseOpcode(Opcode);
assert(ISD::getVPMaskIdx(VPOpcode) == 1 &&
ISD::getVPExplicitVectorLengthIdx(VPOpcode) == 2);
return DAG.getNode(VPOpcode, DL, VT,
{Operand, RootMaskOp, RootVectorLenOp});
}
SDValue getNode(unsigned Opcode, const SDLoc &DL, EVT VT, SDValue N1,
SDValue N2) {
unsigned VPOpcode = ISD::getVPForBaseOpcode(Opcode);
assert(ISD::getVPMaskIdx(VPOpcode) == 2 &&
ISD::getVPExplicitVectorLengthIdx(VPOpcode) == 3);
return DAG.getNode(VPOpcode, DL, VT, {N1, N2, RootMaskOp, RootVectorLenOp});
}
SDValue getNode(unsigned Opcode, const SDLoc &DL, EVT VT, SDValue N1,
SDValue N2, SDValue N3) {
unsigned VPOpcode = ISD::getVPForBaseOpcode(Opcode);
assert(ISD::getVPMaskIdx(VPOpcode) == 3 &&
ISD::getVPExplicitVectorLengthIdx(VPOpcode) == 4);
return DAG.getNode(VPOpcode, DL, VT,
{N1, N2, N3, RootMaskOp, RootVectorLenOp});
}
SDValue getNode(unsigned Opcode, const SDLoc &DL, EVT VT, SDValue Operand,
SDNodeFlags Flags) {
unsigned VPOpcode = ISD::getVPForBaseOpcode(Opcode);
assert(ISD::getVPMaskIdx(VPOpcode) == 1 &&
ISD::getVPExplicitVectorLengthIdx(VPOpcode) == 2);
return DAG.getNode(VPOpcode, DL, VT, {Operand, RootMaskOp, RootVectorLenOp},
Flags);
}
SDValue getNode(unsigned Opcode, const SDLoc &DL, EVT VT, SDValue N1,
SDValue N2, SDNodeFlags Flags) {
unsigned VPOpcode = ISD::getVPForBaseOpcode(Opcode);
assert(ISD::getVPMaskIdx(VPOpcode) == 2 &&
ISD::getVPExplicitVectorLengthIdx(VPOpcode) == 3);
return DAG.getNode(VPOpcode, DL, VT, {N1, N2, RootMaskOp, RootVectorLenOp},
Flags);
}
SDValue getNode(unsigned Opcode, const SDLoc &DL, EVT VT, SDValue N1,
SDValue N2, SDValue N3, SDNodeFlags Flags) {
unsigned VPOpcode = ISD::getVPForBaseOpcode(Opcode);
assert(ISD::getVPMaskIdx(VPOpcode) == 3 &&
ISD::getVPExplicitVectorLengthIdx(VPOpcode) == 4);
return DAG.getNode(VPOpcode, DL, VT,
{N1, N2, N3, RootMaskOp, RootVectorLenOp}, Flags);
}
bool isOperationLegal(unsigned Op, EVT VT) const {
unsigned VPOp = ISD::getVPForBaseOpcode(Op);
return TLI.isOperationLegal(VPOp, VT);
}
bool isOperationLegalOrCustom(unsigned Op, EVT VT,
bool LegalOnly = false) const {
unsigned VPOp = ISD::getVPForBaseOpcode(Op);
return TLI.isOperationLegalOrCustom(VPOp, VT, LegalOnly);
}
};
} // end anonymous namespace
#endif
|
