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
|
//===- SystemZInstrInfo.cpp - SystemZ Instruction Information --------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file contains the SystemZ implementation of the TargetInstrInfo class.
//
//===----------------------------------------------------------------------===//
#include "SystemZ.h"
#include "SystemZInstrInfo.h"
#include "SystemZMachineFunctionInfo.h"
#include "SystemZTargetMachine.h"
#include "SystemZGenInstrInfo.inc"
#include "llvm/Function.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
using namespace llvm;
SystemZInstrInfo::SystemZInstrInfo(SystemZTargetMachine &tm)
: TargetInstrInfoImpl(SystemZInsts, array_lengthof(SystemZInsts)),
RI(tm, *this), TM(tm) {}
void SystemZInstrInfo::storeRegToStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
unsigned SrcReg, bool isKill, int FrameIdx,
const TargetRegisterClass *RC) const {
assert(0 && "Cannot store this register to stack slot!");
}
void SystemZInstrInfo::loadRegFromStackSlot(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
unsigned DestReg, int FrameIdx,
const TargetRegisterClass *RC) const{
assert(0 && "Cannot store this register to stack slot!");
}
bool SystemZInstrInfo::copyRegToReg(MachineBasicBlock &MBB,
MachineBasicBlock::iterator I,
unsigned DestReg, unsigned SrcReg,
const TargetRegisterClass *DestRC,
const TargetRegisterClass *SrcRC) const {
DebugLoc DL = DebugLoc::getUnknownLoc();
if (I != MBB.end()) DL = I->getDebugLoc();
// Determine if DstRC and SrcRC have a common superclass.
const TargetRegisterClass *CommonRC = DestRC;
if (DestRC == SrcRC)
/* Same regclass for source and dest */;
else if (CommonRC->hasSuperClass(SrcRC))
CommonRC = SrcRC;
else if (!CommonRC->hasSubClass(SrcRC))
CommonRC = 0;
if (CommonRC) {
unsigned Opc;
if (CommonRC == &SystemZ::GR64RegClass ||
CommonRC == &SystemZ::ADDR64RegClass) {
Opc = SystemZ::MOV64rr;
} else if (CommonRC == &SystemZ::GR32RegClass ||
CommonRC == &SystemZ::ADDR32RegClass) {
Opc = SystemZ::MOV32rr;
} else {
return false;
}
BuildMI(MBB, I, DL, get(Opc), DestReg).addReg(SrcReg);
return true;
}
if ((SrcRC == &SystemZ::GR64RegClass &&
DestRC == &SystemZ::ADDR64RegClass) ||
(DestRC == &SystemZ::GR64RegClass &&
SrcRC == &SystemZ::ADDR64RegClass)) {
BuildMI(MBB, I, DL, get(SystemZ::MOV64rr), DestReg).addReg(SrcReg);
return true;
} else if ((SrcRC == &SystemZ::GR32RegClass &&
DestRC == &SystemZ::ADDR32RegClass) ||
(DestRC == &SystemZ::GR32RegClass &&
SrcRC == &SystemZ::ADDR32RegClass)) {
BuildMI(MBB, I, DL, get(SystemZ::MOV32rr), DestReg).addReg(SrcReg);
return true;
}
return false;
}
bool
SystemZInstrInfo::isMoveInstr(const MachineInstr& MI,
unsigned &SrcReg, unsigned &DstReg,
unsigned &SrcSubIdx, unsigned &DstSubIdx) const {
SrcSubIdx = DstSubIdx = 0; // No sub-registers yet.
switch (MI.getOpcode()) {
default:
return false;
case SystemZ::MOV32rr:
case SystemZ::MOV64rr:
assert(MI.getNumOperands() >= 2 &&
MI.getOperand(0).isReg() &&
MI.getOperand(1).isReg() &&
"invalid register-register move instruction");
SrcReg = MI.getOperand(1).getReg();
DstReg = MI.getOperand(0).getReg();
return true;
}
}
bool
SystemZInstrInfo::spillCalleeSavedRegisters(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
const std::vector<CalleeSavedInfo> &CSI) const {
return false;
}
bool
SystemZInstrInfo::restoreCalleeSavedRegisters(MachineBasicBlock &MBB,
MachineBasicBlock::iterator MI,
const std::vector<CalleeSavedInfo> &CSI) const {
return false;
}
unsigned
SystemZInstrInfo::InsertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB,
MachineBasicBlock *FBB,
const SmallVectorImpl<MachineOperand> &Cond) const {
assert(0 && "Implement branches!");
return 0;
}
|
