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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
| //===-- X86MachineFunctionInfo.h - X86 machine function info ----*- 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 X86-specific per-machine-function information.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_LIB_TARGET_X86_X86MACHINEFUNCTIONINFO_H
#define LLVM_LIB_TARGET_X86_X86MACHINEFUNCTIONINFO_H
#include "llvm/CodeGen/CallingConvLower.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/Support/MachineValueType.h"
namespace llvm {
/// X86MachineFunctionInfo - This class is derived from MachineFunction and
/// contains private X86 target-specific information for each MachineFunction.
class X86MachineFunctionInfo : public MachineFunctionInfo {
virtual void anchor();
/// ForceFramePointer - True if the function is required to use of frame
/// pointer for reasons other than it containing dynamic allocation or
/// that FP eliminatation is turned off. For example, Cygwin main function
/// contains stack pointer re-alignment code which requires FP.
bool ForceFramePointer = false;
/// RestoreBasePointerOffset - Non-zero if the function has base pointer
/// and makes call to llvm.eh.sjlj.setjmp. When non-zero, the value is a
/// displacement from the frame pointer to a slot where the base pointer
/// is stashed.
signed char RestoreBasePointerOffset = 0;
/// WinEHXMMSlotInfo - Slot information of XMM registers in the stack frame
/// in bytes.
DenseMap<int, unsigned> WinEHXMMSlotInfo;
/// CalleeSavedFrameSize - Size of the callee-saved register portion of the
/// stack frame in bytes.
unsigned CalleeSavedFrameSize = 0;
/// BytesToPopOnReturn - Number of bytes function pops on return (in addition
/// to the space used by the return address).
/// Used on windows platform for stdcall & fastcall name decoration
unsigned BytesToPopOnReturn = 0;
/// ReturnAddrIndex - FrameIndex for return slot.
int ReturnAddrIndex = 0;
/// FrameIndex for return slot.
int FrameAddrIndex = 0;
/// TailCallReturnAddrDelta - The number of bytes by which return address
/// stack slot is moved as the result of tail call optimization.
int TailCallReturnAddrDelta = 0;
/// SRetReturnReg - Some subtargets require that sret lowering includes
/// returning the value of the returned struct in a register. This field
/// holds the virtual register into which the sret argument is passed.
unsigned SRetReturnReg = 0;
/// GlobalBaseReg - keeps track of the virtual register initialized for
/// use as the global base register. This is used for PIC in some PIC
/// relocation models.
unsigned GlobalBaseReg = 0;
/// VarArgsFrameIndex - FrameIndex for start of varargs area.
int VarArgsFrameIndex = 0;
/// RegSaveFrameIndex - X86-64 vararg func register save area.
int RegSaveFrameIndex = 0;
/// VarArgsGPOffset - X86-64 vararg func int reg offset.
unsigned VarArgsGPOffset = 0;
/// VarArgsFPOffset - X86-64 vararg func fp reg offset.
unsigned VarArgsFPOffset = 0;
/// ArgumentStackSize - The number of bytes on stack consumed by the arguments
/// being passed on the stack.
unsigned ArgumentStackSize = 0;
/// NumLocalDynamics - Number of local-dynamic TLS accesses.
unsigned NumLocalDynamics = 0;
/// HasPushSequences - Keeps track of whether this function uses sequences
/// of pushes to pass function parameters.
bool HasPushSequences = false;
/// True if the function recovers from an SEH exception, and therefore needs
/// to spill and restore the frame pointer.
bool HasSEHFramePtrSave = false;
/// The frame index of a stack object containing the original frame pointer
/// used to address arguments in a function using a base pointer.
int SEHFramePtrSaveIndex = 0;
/// True if this function has a subset of CSRs that is handled explicitly via
/// copies.
bool IsSplitCSR = false;
/// True if this function uses the red zone.
bool UsesRedZone = false;
/// True if this function has WIN_ALLOCA instructions.
bool HasWinAlloca = false;
private:
/// ForwardedMustTailRegParms - A list of virtual and physical registers
/// that must be forwarded to every musttail call.
SmallVector<ForwardedRegister, 1> ForwardedMustTailRegParms;
public:
X86MachineFunctionInfo() = default;
explicit X86MachineFunctionInfo(MachineFunction &MF) {}
bool getForceFramePointer() const { return ForceFramePointer;}
void setForceFramePointer(bool forceFP) { ForceFramePointer = forceFP; }
bool getHasPushSequences() const { return HasPushSequences; }
void setHasPushSequences(bool HasPush) { HasPushSequences = HasPush; }
bool getRestoreBasePointer() const { return RestoreBasePointerOffset!=0; }
void setRestoreBasePointer(const MachineFunction *MF);
int getRestoreBasePointerOffset() const {return RestoreBasePointerOffset; }
DenseMap<int, unsigned>& getWinEHXMMSlotInfo() { return WinEHXMMSlotInfo; }
const DenseMap<int, unsigned>& getWinEHXMMSlotInfo() const {
return WinEHXMMSlotInfo; }
unsigned getCalleeSavedFrameSize() const { return CalleeSavedFrameSize; }
void setCalleeSavedFrameSize(unsigned bytes) { CalleeSavedFrameSize = bytes; }
unsigned getBytesToPopOnReturn() const { return BytesToPopOnReturn; }
void setBytesToPopOnReturn (unsigned bytes) { BytesToPopOnReturn = bytes;}
int getRAIndex() const { return ReturnAddrIndex; }
void setRAIndex(int Index) { ReturnAddrIndex = Index; }
int getFAIndex() const { return FrameAddrIndex; }
void setFAIndex(int Index) { FrameAddrIndex = Index; }
int getTCReturnAddrDelta() const { return TailCallReturnAddrDelta; }
void setTCReturnAddrDelta(int delta) {TailCallReturnAddrDelta = delta;}
unsigned getSRetReturnReg() const { return SRetReturnReg; }
void setSRetReturnReg(unsigned Reg) { SRetReturnReg = Reg; }
unsigned getGlobalBaseReg() const { return GlobalBaseReg; }
void setGlobalBaseReg(unsigned Reg) { GlobalBaseReg = Reg; }
int getVarArgsFrameIndex() const { return VarArgsFrameIndex; }
void setVarArgsFrameIndex(int Idx) { VarArgsFrameIndex = Idx; }
int getRegSaveFrameIndex() const { return RegSaveFrameIndex; }
void setRegSaveFrameIndex(int Idx) { RegSaveFrameIndex = Idx; }
unsigned getVarArgsGPOffset() const { return VarArgsGPOffset; }
void setVarArgsGPOffset(unsigned Offset) { VarArgsGPOffset = Offset; }
unsigned getVarArgsFPOffset() const { return VarArgsFPOffset; }
void setVarArgsFPOffset(unsigned Offset) { VarArgsFPOffset = Offset; }
unsigned getArgumentStackSize() const { return ArgumentStackSize; }
void setArgumentStackSize(unsigned size) { ArgumentStackSize = size; }
unsigned getNumLocalDynamicTLSAccesses() const { return NumLocalDynamics; }
void incNumLocalDynamicTLSAccesses() { ++NumLocalDynamics; }
bool getHasSEHFramePtrSave() const { return HasSEHFramePtrSave; }
void setHasSEHFramePtrSave(bool V) { HasSEHFramePtrSave = V; }
int getSEHFramePtrSaveIndex() const { return SEHFramePtrSaveIndex; }
void setSEHFramePtrSaveIndex(int Index) { SEHFramePtrSaveIndex = Index; }
SmallVectorImpl<ForwardedRegister> &getForwardedMustTailRegParms() {
return ForwardedMustTailRegParms;
}
bool isSplitCSR() const { return IsSplitCSR; }
void setIsSplitCSR(bool s) { IsSplitCSR = s; }
bool getUsesRedZone() const { return UsesRedZone; }
void setUsesRedZone(bool V) { UsesRedZone = V; }
bool hasWinAlloca() const { return HasWinAlloca; }
void setHasWinAlloca(bool v) { HasWinAlloca = v; }
};
} // End llvm namespace
#endif
|