0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
1 //===---------------------------- StackMaps.cpp ---------------------------===//
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
2 //
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
3 // The LLVM Compiler Infrastructure
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
4 //
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
5 // This file is distributed under the University of Illinois Open Source
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
6 // License. See LICENSE.TXT for details.
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
7 //
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
8 //===----------------------------------------------------------------------===//
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
9
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
10 #include "llvm/CodeGen/StackMaps.h"
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
11 #include "llvm/CodeGen/AsmPrinter.h"
|
|
77
|
12 #include "llvm/CodeGen/MachineFrameInfo.h"
|
|
|
13 #include "llvm/CodeGen/MachineFunction.h"
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
14 #include "llvm/CodeGen/MachineInstr.h"
|
|
33
|
15 #include "llvm/IR/DataLayout.h"
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
16 #include "llvm/MC/MCContext.h"
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
17 #include "llvm/MC/MCExpr.h"
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
18 #include "llvm/MC/MCObjectFileInfo.h"
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
19 #include "llvm/MC/MCSectionMachO.h"
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
20 #include "llvm/MC/MCStreamer.h"
|
|
77
|
21 #include "llvm/Support/CommandLine.h"
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
22 #include "llvm/Support/Debug.h"
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
23 #include "llvm/Support/raw_ostream.h"
|
|
77
|
24 #include "llvm/Target/TargetMachine.h"
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
25 #include "llvm/Target/TargetOpcodes.h"
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
26 #include "llvm/Target/TargetRegisterInfo.h"
|
|
77
|
27 #include "llvm/Target/TargetSubtargetInfo.h"
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
28 #include <iterator>
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
29
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
30 using namespace llvm;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
31
|
|
77
|
32 #define DEBUG_TYPE "stackmaps"
|
|
|
33
|
|
|
34 static cl::opt<int> StackMapVersion("stackmap-version", cl::init(1),
|
|
|
35 cl::desc("Specify the stackmap encoding version (default = 1)"));
|
|
|
36
|
|
|
37 const char *StackMaps::WSMP = "Stack Maps: ";
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
38
|
|
77
|
39 PatchPointOpers::PatchPointOpers(const MachineInstr *MI)
|
|
|
40 : MI(MI),
|
|
|
41 HasDef(MI->getOperand(0).isReg() && MI->getOperand(0).isDef() &&
|
|
|
42 !MI->getOperand(0).isImplicit()),
|
|
|
43 IsAnyReg(MI->getOperand(getMetaIdx(CCPos)).getImm() == CallingConv::AnyReg)
|
|
|
44 {
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
45 #ifndef NDEBUG
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
46 unsigned CheckStartIdx = 0, e = MI->getNumOperands();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
47 while (CheckStartIdx < e && MI->getOperand(CheckStartIdx).isReg() &&
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
48 MI->getOperand(CheckStartIdx).isDef() &&
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
49 !MI->getOperand(CheckStartIdx).isImplicit())
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
50 ++CheckStartIdx;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
51
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
52 assert(getMetaIdx() == CheckStartIdx &&
|
|
77
|
53 "Unexpected additional definition in Patchpoint intrinsic.");
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
54 #endif
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
55 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
56
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
57 unsigned PatchPointOpers::getNextScratchIdx(unsigned StartIdx) const {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
58 if (!StartIdx)
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
59 StartIdx = getVarIdx();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
60
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
61 // Find the next scratch register (implicit def and early clobber)
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
62 unsigned ScratchIdx = StartIdx, e = MI->getNumOperands();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
63 while (ScratchIdx < e &&
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
64 !(MI->getOperand(ScratchIdx).isReg() &&
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
65 MI->getOperand(ScratchIdx).isDef() &&
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
66 MI->getOperand(ScratchIdx).isImplicit() &&
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
67 MI->getOperand(ScratchIdx).isEarlyClobber()))
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
68 ++ScratchIdx;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
69
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
70 assert(ScratchIdx != e && "No scratch register available");
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
71 return ScratchIdx;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
72 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
73
|
|
77
|
74 StackMaps::StackMaps(AsmPrinter &AP) : AP(AP) {
|
|
|
75 if (StackMapVersion != 1)
|
|
|
76 llvm_unreachable("Unsupported stackmap version!");
|
|
|
77 }
|
|
|
78
|
|
|
79 MachineInstr::const_mop_iterator
|
|
33
|
80 StackMaps::parseOperand(MachineInstr::const_mop_iterator MOI,
|
|
77
|
81 MachineInstr::const_mop_iterator MOE,
|
|
|
82 LocationVec &Locs, LiveOutVec &LiveOuts) const {
|
|
|
83 if (MOI->isImm()) {
|
|
|
84 switch (MOI->getImm()) {
|
|
|
85 default: llvm_unreachable("Unrecognized operand type.");
|
|
|
86 case StackMaps::DirectMemRefOp: {
|
|
|
87 unsigned Size =
|
|
|
88 AP.TM.getSubtargetImpl()->getDataLayout()->getPointerSizeInBits();
|
|
|
89 assert((Size % 8) == 0 && "Need pointer size in bytes.");
|
|
|
90 Size /= 8;
|
|
|
91 unsigned Reg = (++MOI)->getReg();
|
|
|
92 int64_t Imm = (++MOI)->getImm();
|
|
|
93 Locs.push_back(Location(StackMaps::Location::Direct, Size, Reg, Imm));
|
|
|
94 break;
|
|
|
95 }
|
|
|
96 case StackMaps::IndirectMemRefOp: {
|
|
|
97 int64_t Size = (++MOI)->getImm();
|
|
|
98 assert(Size > 0 && "Need a valid size for indirect memory locations.");
|
|
|
99 unsigned Reg = (++MOI)->getReg();
|
|
|
100 int64_t Imm = (++MOI)->getImm();
|
|
|
101 Locs.push_back(Location(StackMaps::Location::Indirect, Size, Reg, Imm));
|
|
|
102 break;
|
|
|
103 }
|
|
|
104 case StackMaps::ConstantOp: {
|
|
|
105 ++MOI;
|
|
|
106 assert(MOI->isImm() && "Expected constant operand.");
|
|
|
107 int64_t Imm = MOI->getImm();
|
|
|
108 Locs.push_back(Location(Location::Constant, sizeof(int64_t), 0, Imm));
|
|
|
109 break;
|
|
|
110 }
|
|
|
111 }
|
|
|
112 return ++MOI;
|
|
|
113 }
|
|
33
|
114
|
|
77
|
115 // The physical register number will ultimately be encoded as a DWARF regno.
|
|
|
116 // The stack map also records the size of a spill slot that can hold the
|
|
|
117 // register content. (The runtime can track the actual size of the data type
|
|
|
118 // if it needs to.)
|
|
|
119 if (MOI->isReg()) {
|
|
|
120 // Skip implicit registers (this includes our scratch registers)
|
|
|
121 if (MOI->isImplicit())
|
|
|
122 return ++MOI;
|
|
33
|
123
|
|
77
|
124 assert(TargetRegisterInfo::isPhysicalRegister(MOI->getReg()) &&
|
|
|
125 "Virtreg operands should have been rewritten before now.");
|
|
|
126 const TargetRegisterClass *RC =
|
|
|
127 AP.TM.getSubtargetImpl()->getRegisterInfo()->getMinimalPhysRegClass(
|
|
|
128 MOI->getReg());
|
|
|
129 assert(!MOI->getSubReg() && "Physical subreg still around.");
|
|
|
130 Locs.push_back(
|
|
|
131 Location(Location::Register, RC->getSize(), MOI->getReg(), 0));
|
|
|
132 return ++MOI;
|
|
|
133 }
|
|
|
134
|
|
|
135 if (MOI->isRegLiveOut())
|
|
|
136 LiveOuts = parseRegisterLiveOutMask(MOI->getRegLiveOut());
|
|
|
137
|
|
|
138 return ++MOI;
|
|
|
139 }
|
|
|
140
|
|
|
141 /// Go up the super-register chain until we hit a valid dwarf register number.
|
|
|
142 static unsigned getDwarfRegNum(unsigned Reg, const TargetRegisterInfo *TRI) {
|
|
|
143 int RegNo = TRI->getDwarfRegNum(Reg, false);
|
|
|
144 for (MCSuperRegIterator SR(Reg, TRI); SR.isValid() && RegNo < 0; ++SR)
|
|
|
145 RegNo = TRI->getDwarfRegNum(*SR, false);
|
|
|
146
|
|
|
147 assert(RegNo >= 0 && "Invalid Dwarf register number.");
|
|
|
148 return (unsigned) RegNo;
|
|
|
149 }
|
|
|
150
|
|
|
151 /// Create a live-out register record for the given register Reg.
|
|
|
152 StackMaps::LiveOutReg
|
|
|
153 StackMaps::createLiveOutReg(unsigned Reg, const TargetRegisterInfo *TRI) const {
|
|
|
154 unsigned RegNo = getDwarfRegNum(Reg, TRI);
|
|
|
155 unsigned Size = TRI->getMinimalPhysRegClass(Reg)->getSize();
|
|
|
156 return LiveOutReg(Reg, RegNo, Size);
|
|
|
157 }
|
|
|
158
|
|
|
159 /// Parse the register live-out mask and return a vector of live-out registers
|
|
|
160 /// that need to be recorded in the stackmap.
|
|
|
161 StackMaps::LiveOutVec
|
|
|
162 StackMaps::parseRegisterLiveOutMask(const uint32_t *Mask) const {
|
|
|
163 assert(Mask && "No register mask specified");
|
|
|
164 const TargetRegisterInfo *TRI = AP.TM.getSubtargetImpl()->getRegisterInfo();
|
|
|
165 LiveOutVec LiveOuts;
|
|
|
166
|
|
|
167 // Create a LiveOutReg for each bit that is set in the register mask.
|
|
|
168 for (unsigned Reg = 0, NumRegs = TRI->getNumRegs(); Reg != NumRegs; ++Reg)
|
|
|
169 if ((Mask[Reg / 32] >> Reg % 32) & 1)
|
|
|
170 LiveOuts.push_back(createLiveOutReg(Reg, TRI));
|
|
|
171
|
|
|
172 // We don't need to keep track of a register if its super-register is already
|
|
|
173 // in the list. Merge entries that refer to the same dwarf register and use
|
|
|
174 // the maximum size that needs to be spilled.
|
|
|
175 std::sort(LiveOuts.begin(), LiveOuts.end());
|
|
|
176 for (LiveOutVec::iterator I = LiveOuts.begin(), E = LiveOuts.end();
|
|
|
177 I != E; ++I) {
|
|
|
178 for (LiveOutVec::iterator II = std::next(I); II != E; ++II) {
|
|
|
179 if (I->RegNo != II->RegNo) {
|
|
|
180 // Skip all the now invalid entries.
|
|
|
181 I = --II;
|
|
|
182 break;
|
|
33
|
183 }
|
|
77
|
184 I->Size = std::max(I->Size, II->Size);
|
|
|
185 if (TRI->isSuperRegister(I->Reg, II->Reg))
|
|
|
186 I->Reg = II->Reg;
|
|
|
187 II->MarkInvalid();
|
|
33
|
188 }
|
|
|
189 }
|
|
77
|
190 LiveOuts.erase(std::remove_if(LiveOuts.begin(), LiveOuts.end(),
|
|
|
191 LiveOutReg::IsInvalid), LiveOuts.end());
|
|
|
192 return LiveOuts;
|
|
33
|
193 }
|
|
|
194
|
|
77
|
195 void StackMaps::recordStackMapOpers(const MachineInstr &MI, uint64_t ID,
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
196 MachineInstr::const_mop_iterator MOI,
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
197 MachineInstr::const_mop_iterator MOE,
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
198 bool recordResult) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
199
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
200 MCContext &OutContext = AP.OutStreamer.getContext();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
201 MCSymbol *MILabel = OutContext.CreateTempSymbol();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
202 AP.OutStreamer.EmitLabel(MILabel);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
203
|
|
77
|
204 LocationVec Locations;
|
|
|
205 LiveOutVec LiveOuts;
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
206
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
207 if (recordResult) {
|
|
77
|
208 assert(PatchPointOpers(&MI).hasDef() && "Stackmap has no return value.");
|
|
|
209 parseOperand(MI.operands_begin(), std::next(MI.operands_begin()),
|
|
|
210 Locations, LiveOuts);
|
|
|
211 }
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
212
|
|
77
|
213 // Parse operands.
|
|
|
214 while (MOI != MOE) {
|
|
|
215 MOI = parseOperand(MOI, MOE, Locations, LiveOuts);
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
216 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
217
|
|
77
|
218 // Move large constants into the constant pool.
|
|
|
219 for (LocationVec::iterator I = Locations.begin(), E = Locations.end();
|
|
|
220 I != E; ++I) {
|
|
|
221 // Constants are encoded as sign-extended integers.
|
|
|
222 // -1 is directly encoded as .long 0xFFFFFFFF with no constant pool.
|
|
|
223 if (I->LocType == Location::Constant &&
|
|
|
224 ((I->Offset + (int64_t(1)<<31)) >> 32) != 0) {
|
|
|
225 I->LocType = Location::ConstantIndex;
|
|
|
226 auto Result = ConstPool.insert(std::make_pair(I->Offset, I->Offset));
|
|
|
227 I->Offset = Result.first - ConstPool.begin();
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
228 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
229 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
230
|
|
77
|
231 // Create an expression to calculate the offset of the callsite from function
|
|
|
232 // entry.
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
233 const MCExpr *CSOffsetExpr = MCBinaryExpr::CreateSub(
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
234 MCSymbolRefExpr::Create(MILabel, OutContext),
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
235 MCSymbolRefExpr::Create(AP.CurrentFnSym, OutContext),
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
236 OutContext);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
237
|
|
77
|
238 CSInfos.push_back(CallsiteInfo(CSOffsetExpr, ID, Locations, LiveOuts));
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
239
|
|
77
|
240 // Record the stack size of the current function.
|
|
|
241 const MachineFrameInfo *MFI = AP.MF->getFrameInfo();
|
|
|
242 const TargetRegisterInfo *RegInfo = AP.MF->getSubtarget().getRegisterInfo();
|
|
|
243 const bool DynamicFrameSize = MFI->hasVarSizedObjects() ||
|
|
|
244 RegInfo->needsStackRealignment(*(AP.MF));
|
|
|
245 FnStackSize[AP.CurrentFnSym] =
|
|
|
246 DynamicFrameSize ? UINT64_MAX : MFI->getStackSize();
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
247 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
248
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
249 void StackMaps::recordStackMap(const MachineInstr &MI) {
|
|
77
|
250 assert(MI.getOpcode() == TargetOpcode::STACKMAP && "expected stackmap");
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
251
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
252 int64_t ID = MI.getOperand(0).getImm();
|
|
77
|
253 recordStackMapOpers(MI, ID, std::next(MI.operands_begin(), 2),
|
|
|
254 MI.operands_end());
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
255 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
256
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
257 void StackMaps::recordPatchPoint(const MachineInstr &MI) {
|
|
77
|
258 assert(MI.getOpcode() == TargetOpcode::PATCHPOINT && "expected patchpoint");
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
259
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
260 PatchPointOpers opers(&MI);
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
261 int64_t ID = opers.getMetaOper(PatchPointOpers::IDPos).getImm();
|
|
77
|
262
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
263 MachineInstr::const_mop_iterator MOI =
|
|
77
|
264 std::next(MI.operands_begin(), opers.getStackMapStartIdx());
|
|
|
265 recordStackMapOpers(MI, ID, MOI, MI.operands_end(),
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
266 opers.isAnyReg() && opers.hasDef());
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
267
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
268 #ifndef NDEBUG
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
269 // verify anyregcc
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
270 LocationVec &Locations = CSInfos.back().Locations;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
271 if (opers.isAnyReg()) {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
272 unsigned NArgs = opers.getMetaOper(PatchPointOpers::NArgPos).getImm();
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
273 for (unsigned i = 0, e = (opers.hasDef() ? NArgs+1 : NArgs); i != e; ++i)
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
274 assert(Locations[i].LocType == Location::Register &&
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
275 "anyreg arg must be in reg.");
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
276 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
277 #endif
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
278 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
279
|
|
77
|
280 /// Emit the stackmap header.
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
281 ///
|
|
77
|
282 /// Header {
|
|
|
283 /// uint8 : Stack Map Version (currently 1)
|
|
|
284 /// uint8 : Reserved (expected to be 0)
|
|
|
285 /// uint16 : Reserved (expected to be 0)
|
|
|
286 /// }
|
|
|
287 /// uint32 : NumFunctions
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
288 /// uint32 : NumConstants
|
|
77
|
289 /// uint32 : NumRecords
|
|
|
290 void StackMaps::emitStackmapHeader(MCStreamer &OS) {
|
|
|
291 // Header.
|
|
|
292 OS.EmitIntValue(StackMapVersion, 1); // Version.
|
|
|
293 OS.EmitIntValue(0, 1); // Reserved.
|
|
|
294 OS.EmitIntValue(0, 2); // Reserved.
|
|
|
295
|
|
|
296 // Num functions.
|
|
|
297 DEBUG(dbgs() << WSMP << "#functions = " << FnStackSize.size() << '\n');
|
|
|
298 OS.EmitIntValue(FnStackSize.size(), 4);
|
|
|
299 // Num constants.
|
|
|
300 DEBUG(dbgs() << WSMP << "#constants = " << ConstPool.size() << '\n');
|
|
|
301 OS.EmitIntValue(ConstPool.size(), 4);
|
|
|
302 // Num callsites.
|
|
|
303 DEBUG(dbgs() << WSMP << "#callsites = " << CSInfos.size() << '\n');
|
|
|
304 OS.EmitIntValue(CSInfos.size(), 4);
|
|
|
305 }
|
|
|
306
|
|
|
307 /// Emit the function frame record for each function.
|
|
|
308 ///
|
|
|
309 /// StkSizeRecord[NumFunctions] {
|
|
|
310 /// uint64 : Function Address
|
|
|
311 /// uint64 : Stack Size
|
|
|
312 /// }
|
|
|
313 void StackMaps::emitFunctionFrameRecords(MCStreamer &OS) {
|
|
|
314 // Function Frame records.
|
|
|
315 DEBUG(dbgs() << WSMP << "functions:\n");
|
|
|
316 for (auto const &FR : FnStackSize) {
|
|
|
317 DEBUG(dbgs() << WSMP << "function addr: " << FR.first
|
|
|
318 << " frame size: " << FR.second);
|
|
|
319 OS.EmitSymbolValue(FR.first, 8);
|
|
|
320 OS.EmitIntValue(FR.second, 8);
|
|
|
321 }
|
|
|
322 }
|
|
|
323
|
|
|
324 /// Emit the constant pool.
|
|
|
325 ///
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
326 /// int64 : Constants[NumConstants]
|
|
77
|
327 void StackMaps::emitConstantPoolEntries(MCStreamer &OS) {
|
|
|
328 // Constant pool entries.
|
|
|
329 DEBUG(dbgs() << WSMP << "constants:\n");
|
|
|
330 for (auto ConstEntry : ConstPool) {
|
|
|
331 DEBUG(dbgs() << WSMP << ConstEntry.second << '\n');
|
|
|
332 OS.EmitIntValue(ConstEntry.second, 8);
|
|
|
333 }
|
|
|
334 }
|
|
|
335
|
|
|
336 /// Emit the callsite info for each callsite.
|
|
|
337 ///
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
338 /// StkMapRecord[NumRecords] {
|
|
77
|
339 /// uint64 : PatchPoint ID
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
340 /// uint32 : Instruction Offset
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
341 /// uint16 : Reserved (record flags)
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
342 /// uint16 : NumLocations
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
343 /// Location[NumLocations] {
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
344 /// uint8 : Register | Direct | Indirect | Constant | ConstantIndex
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
345 /// uint8 : Size in Bytes
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
346 /// uint16 : Dwarf RegNum
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
347 /// int32 : Offset
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
348 /// }
|
|
77
|
349 /// uint16 : Padding
|
|
|
350 /// uint16 : NumLiveOuts
|
|
|
351 /// LiveOuts[NumLiveOuts] {
|
|
|
352 /// uint16 : Dwarf RegNum
|
|
|
353 /// uint8 : Reserved
|
|
|
354 /// uint8 : Size in Bytes
|
|
|
355 /// }
|
|
|
356 /// uint32 : Padding (only if required to align to 8 byte)
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
357 /// }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
358 ///
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
359 /// Location Encoding, Type, Value:
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
360 /// 0x1, Register, Reg (value in register)
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
361 /// 0x2, Direct, Reg + Offset (frame index)
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
362 /// 0x3, Indirect, [Reg + Offset] (spilled value)
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
363 /// 0x4, Constant, Offset (small constant)
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
364 /// 0x5, ConstIndex, Constants[Offset] (large constant)
|
|
77
|
365 void StackMaps::emitCallsiteEntries(MCStreamer &OS,
|
|
|
366 const TargetRegisterInfo *TRI) {
|
|
|
367 // Callsite entries.
|
|
|
368 DEBUG(dbgs() << WSMP << "callsites:\n");
|
|
|
369 for (const auto &CSI : CSInfos) {
|
|
|
370 const LocationVec &CSLocs = CSI.Locations;
|
|
|
371 const LiveOutVec &LiveOuts = CSI.LiveOuts;
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
372
|
|
77
|
373 DEBUG(dbgs() << WSMP << "callsite " << CSI.ID << "\n");
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
374
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
375 // Verify stack map entry. It's better to communicate a problem to the
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
376 // runtime than crash in case of in-process compilation. Currently, we do
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
377 // simple overflow checks, but we may eventually communicate other
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
378 // compilation errors this way.
|
|
77
|
379 if (CSLocs.size() > UINT16_MAX || LiveOuts.size() > UINT16_MAX) {
|
|
|
380 OS.EmitIntValue(UINT64_MAX, 8); // Invalid ID.
|
|
|
381 OS.EmitValue(CSI.CSOffsetExpr, 4);
|
|
|
382 OS.EmitIntValue(0, 2); // Reserved.
|
|
|
383 OS.EmitIntValue(0, 2); // 0 locations.
|
|
|
384 OS.EmitIntValue(0, 2); // padding.
|
|
|
385 OS.EmitIntValue(0, 2); // 0 live-out registers.
|
|
|
386 OS.EmitIntValue(0, 4); // padding.
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
387 continue;
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
388 }
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
389
|
|
77
|
390 OS.EmitIntValue(CSI.ID, 8);
|
|
|
391 OS.EmitValue(CSI.CSOffsetExpr, 4);
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
392
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
393 // Reserved for flags.
|
|
77
|
394 OS.EmitIntValue(0, 2);
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
395
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
396 DEBUG(dbgs() << WSMP << " has " << CSLocs.size() << " locations\n");
|
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
397
|
|
77
|
398 OS.EmitIntValue(CSLocs.size(), 2);
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
399
|
|
77
|
400 unsigned OperIdx = 0;
|
|
|
401 for (const auto &Loc : CSLocs) {
|
|
33
|
402 unsigned RegNo = 0;
|
|
|
403 int Offset = Loc.Offset;
|
|
|
404 if(Loc.Reg) {
|
|
77
|
405 RegNo = getDwarfRegNum(Loc.Reg, TRI);
|
|
|
406
|
|
33
|
407 // If this is a register location, put the subregister byte offset in
|
|
|
408 // the location offset.
|
|
|
409 if (Loc.LocType == Location::Register) {
|
|
|
410 assert(!Loc.Offset && "Register location should have zero offset");
|
|
77
|
411 unsigned LLVMRegNo = TRI->getLLVMRegNum(RegNo, false);
|
|
|
412 unsigned SubRegIdx = TRI->getSubRegIndex(LLVMRegNo, Loc.Reg);
|
|
33
|
413 if (SubRegIdx)
|
|
77
|
414 Offset = TRI->getSubRegIdxOffset(SubRegIdx);
|
|
33
|
415 }
|
|
|
416 }
|
|
|
417 else {
|
|
|
418 assert(Loc.LocType != Location::Register &&
|
|
|
419 "Missing location register");
|
|
|
420 }
|
|
|
421
|
|
77
|
422 DEBUG(dbgs() << WSMP << " Loc " << OperIdx << ": ";
|
|
|
423 switch (Loc.LocType) {
|
|
|
424 case Location::Unprocessed:
|
|
|
425 dbgs() << "<Unprocessed operand>";
|
|
|
426 break;
|
|
|
427 case Location::Register:
|
|
|
428 dbgs() << "Register " << TRI->getName(Loc.Reg);
|
|
|
429 break;
|
|
|
430 case Location::Direct:
|
|
|
431 dbgs() << "Direct " << TRI->getName(Loc.Reg);
|
|
|
432 if (Loc.Offset)
|
|
|
433 dbgs() << " + " << Loc.Offset;
|
|
|
434 break;
|
|
|
435 case Location::Indirect:
|
|
|
436 dbgs() << "Indirect " << TRI->getName(Loc.Reg)
|
|
|
437 << " + " << Loc.Offset;
|
|
|
438 break;
|
|
|
439 case Location::Constant:
|
|
|
440 dbgs() << "Constant " << Loc.Offset;
|
|
|
441 break;
|
|
|
442 case Location::ConstantIndex:
|
|
|
443 dbgs() << "Constant Index " << Loc.Offset;
|
|
|
444 break;
|
|
|
445 }
|
|
|
446 dbgs() << " [encoding: .byte " << Loc.LocType
|
|
|
447 << ", .byte " << Loc.Size
|
|
|
448 << ", .short " << RegNo
|
|
|
449 << ", .int " << Offset << "]\n";
|
|
|
450 );
|
|
|
451
|
|
|
452 OS.EmitIntValue(Loc.LocType, 1);
|
|
|
453 OS.EmitIntValue(Loc.Size, 1);
|
|
|
454 OS.EmitIntValue(RegNo, 2);
|
|
|
455 OS.EmitIntValue(Offset, 4);
|
|
|
456 OperIdx++;
|
|
|
457 }
|
|
|
458
|
|
|
459 DEBUG(dbgs() << WSMP << " has " << LiveOuts.size()
|
|
|
460 << " live-out registers\n");
|
|
|
461
|
|
|
462 // Num live-out registers and padding to align to 4 byte.
|
|
|
463 OS.EmitIntValue(0, 2);
|
|
|
464 OS.EmitIntValue(LiveOuts.size(), 2);
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
465
|
|
77
|
466 OperIdx = 0;
|
|
|
467 for (const auto &LO : LiveOuts) {
|
|
|
468 DEBUG(dbgs() << WSMP << " LO " << OperIdx << ": "
|
|
|
469 << TRI->getName(LO.Reg)
|
|
|
470 << " [encoding: .short " << LO.RegNo
|
|
|
471 << ", .byte 0, .byte " << LO.Size << "]\n");
|
|
|
472 OS.EmitIntValue(LO.RegNo, 2);
|
|
|
473 OS.EmitIntValue(0, 1);
|
|
|
474 OS.EmitIntValue(LO.Size, 1);
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
475 }
|
|
77
|
476 // Emit alignment to 8 byte.
|
|
|
477 OS.EmitValueToAlignment(8);
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
478 }
|
|
77
|
479 }
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
480
|
|
77
|
481 /// Serialize the stackmap data.
|
|
|
482 void StackMaps::serializeToStackMapSection() {
|
|
|
483 (void) WSMP;
|
|
|
484 // Bail out if there's no stack map data.
|
|
|
485 assert((!CSInfos.empty() || (CSInfos.empty() && ConstPool.empty())) &&
|
|
|
486 "Expected empty constant pool too!");
|
|
|
487 assert((!CSInfos.empty() || (CSInfos.empty() && FnStackSize.empty())) &&
|
|
|
488 "Expected empty function record too!");
|
|
|
489 if (CSInfos.empty())
|
|
|
490 return;
|
|
|
491
|
|
|
492 MCContext &OutContext = AP.OutStreamer.getContext();
|
|
|
493 MCStreamer &OS = AP.OutStreamer;
|
|
|
494 const TargetRegisterInfo *TRI = AP.TM.getSubtargetImpl()->getRegisterInfo();
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
495
|
|
77
|
496 // Create the section.
|
|
|
497 const MCSection *StackMapSection =
|
|
|
498 OutContext.getObjectFileInfo()->getStackMapSection();
|
|
|
499 OS.SwitchSection(StackMapSection);
|
|
|
500
|
|
|
501 // Emit a dummy symbol to force section inclusion.
|
|
|
502 OS.EmitLabel(OutContext.GetOrCreateSymbol(Twine("__LLVM_StackMaps")));
|
|
|
503
|
|
|
504 // Serialize data.
|
|
|
505 DEBUG(dbgs() << "********** Stack Map Output **********\n");
|
|
|
506 emitStackmapHeader(OS);
|
|
|
507 emitFunctionFrameRecords(OS);
|
|
|
508 emitConstantPoolEntries(OS);
|
|
|
509 emitCallsiteEntries(OS, TRI);
|
|
|
510 OS.AddBlankLine();
|
|
|
511
|
|
|
512 // Clean up.
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
513 CSInfos.clear();
|
|
77
|
514 ConstPool.clear();
|
0
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
diff
changeset
|
515 }
|
