#define DEBUG_TYPE "stackmaps"
-static cl::opt<int> StackMapVersion("stackmap-version", cl::init(1),
- cl::desc("Specify the stackmap encoding version (default = 1)"));
+static cl::opt<int> StackMapVersion(
+ "stackmap-version", cl::init(1),
+ cl::desc("Specify the stackmap encoding version (default = 1)"));
const char *StackMaps::WSMP = "Stack Maps: ";
PatchPointOpers::PatchPointOpers(const MachineInstr *MI)
- : MI(MI),
- HasDef(MI->getOperand(0).isReg() && MI->getOperand(0).isDef() &&
- !MI->getOperand(0).isImplicit()),
- IsAnyReg(MI->getOperand(getMetaIdx(CCPos)).getImm() == CallingConv::AnyReg)
-{
+ : MI(MI), HasDef(MI->getOperand(0).isReg() && MI->getOperand(0).isDef() &&
+ !MI->getOperand(0).isImplicit()),
+ IsAnyReg(MI->getOperand(getMetaIdx(CCPos)).getImm() ==
+ CallingConv::AnyReg) {
#ifndef NDEBUG
unsigned CheckStartIdx = 0, e = MI->getNumOperands();
while (CheckStartIdx < e && MI->getOperand(CheckStartIdx).isReg() &&
/// Go up the super-register chain until we hit a valid dwarf register number.
static unsigned getDwarfRegNum(unsigned Reg, const TargetRegisterInfo *TRI) {
- int RegNo = TRI->getDwarfRegNum(Reg, false);
- for (MCSuperRegIterator SR(Reg, TRI); SR.isValid() && RegNo < 0; ++SR)
- RegNo = TRI->getDwarfRegNum(*SR, false);
+ int RegNum = TRI->getDwarfRegNum(Reg, false);
+ for (MCSuperRegIterator SR(Reg, TRI); SR.isValid() && RegNum < 0; ++SR)
+ RegNum = TRI->getDwarfRegNum(*SR, false);
- assert(RegNo >= 0 && "Invalid Dwarf register number.");
- return (unsigned) RegNo;
+ assert(RegNum >= 0 && "Invalid Dwarf register number.");
+ return (unsigned)RegNum;
}
MachineInstr::const_mop_iterator
StackMaps::parseOperand(MachineInstr::const_mop_iterator MOI,
- MachineInstr::const_mop_iterator MOE,
- LocationVec &Locs, LiveOutVec &LiveOuts) const {
+ MachineInstr::const_mop_iterator MOE, LocationVec &Locs,
+ LiveOutVec &LiveOuts) const {
const TargetRegisterInfo *TRI = AP.MF->getSubtarget().getRegisterInfo();
if (MOI->isImm()) {
switch (MOI->getImm()) {
- default: llvm_unreachable("Unrecognized operand type.");
+ default:
+ llvm_unreachable("Unrecognized operand type.");
case StackMaps::DirectMemRefOp: {
- unsigned Size = AP.TM.getDataLayout()->getPointerSizeInBits();
+ auto &DL = AP.MF->getDataLayout();
+
+ unsigned Size = DL.getPointerSizeInBits();
assert((Size % 8) == 0 && "Need pointer size in bytes.");
Size /= 8;
unsigned Reg = (++MOI)->getReg();
int64_t Imm = (++MOI)->getImm();
- Locs.push_back(Location(StackMaps::Location::Direct, Size,
- getDwarfRegNum(Reg, TRI), Imm));
+ Locs.emplace_back(StackMaps::Location::Direct, Size,
+ getDwarfRegNum(Reg, TRI), Imm);
break;
}
case StackMaps::IndirectMemRefOp: {
assert(Size > 0 && "Need a valid size for indirect memory locations.");
unsigned Reg = (++MOI)->getReg();
int64_t Imm = (++MOI)->getImm();
- Locs.push_back(Location(StackMaps::Location::Indirect, Size,
- getDwarfRegNum(Reg, TRI), Imm));
+ Locs.emplace_back(StackMaps::Location::Indirect, Size,
+ getDwarfRegNum(Reg, TRI), Imm);
break;
}
case StackMaps::ConstantOp: {
++MOI;
assert(MOI->isImm() && "Expected constant operand.");
int64_t Imm = MOI->getImm();
- Locs.push_back(Location(Location::Constant, sizeof(int64_t), 0, Imm));
+ Locs.emplace_back(Location::Constant, sizeof(int64_t), 0, Imm);
break;
}
}
assert(!MOI->getSubReg() && "Physical subreg still around.");
unsigned Offset = 0;
- unsigned RegNo = getDwarfRegNum(MOI->getReg(), TRI);
- unsigned LLVMRegNo = TRI->getLLVMRegNum(RegNo, false);
- unsigned SubRegIdx = TRI->getSubRegIndex(LLVMRegNo, MOI->getReg());
+ unsigned DwarfRegNum = getDwarfRegNum(MOI->getReg(), TRI);
+ unsigned LLVMRegNum = TRI->getLLVMRegNum(DwarfRegNum, false);
+ unsigned SubRegIdx = TRI->getSubRegIndex(LLVMRegNum, MOI->getReg());
if (SubRegIdx)
Offset = TRI->getSubRegIdxOffset(SubRegIdx);
- Locs.push_back(
- Location(Location::Register, RC->getSize(), RegNo, Offset));
+ Locs.emplace_back(Location::Register, RC->getSize(), DwarfRegNum, Offset);
return ++MOI;
}
OS << WSMP << "callsite " << CSI.ID << "\n";
OS << WSMP << " has " << CSLocs.size() << " locations\n";
- unsigned OperIdx = 0;
+ unsigned Idx = 0;
for (const auto &Loc : CSLocs) {
- OS << WSMP << " Loc " << OperIdx << ": ";
- switch (Loc.LocType) {
+ OS << WSMP << "\t\tLoc " << Idx << ": ";
+ switch (Loc.Type) {
case Location::Unprocessed:
OS << "<Unprocessed operand>";
break;
case Location::Register:
OS << "Register ";
- if (TRI)
- OS << TRI->getName(Loc.Reg);
- else
- OS << Loc.Reg;
+ if (TRI)
+ OS << TRI->getName(Loc.Reg);
+ else
+ OS << Loc.Reg;
break;
case Location::Direct:
OS << "Direct ";
OS << "Constant Index " << Loc.Offset;
break;
}
- OS << " [encoding: .byte " << Loc.LocType << ", .byte " << Loc.Size
+ OS << "\t[encoding: .byte " << Loc.Type << ", .byte " << Loc.Size
<< ", .short " << Loc.Reg << ", .int " << Loc.Offset << "]\n";
- OperIdx++;
+ Idx++;
}
- OS << WSMP << " has " << LiveOuts.size() << " live-out registers\n";
+ OS << WSMP << "\thas " << LiveOuts.size() << " live-out registers\n";
- OperIdx = 0;
+ Idx = 0;
for (const auto &LO : LiveOuts) {
- OS << WSMP << " LO " << OperIdx << ": ";
+ OS << WSMP << "\t\tLO " << Idx << ": ";
if (TRI)
OS << TRI->getName(LO.Reg);
else
OS << LO.Reg;
- OS << " [encoding: .short " << LO.RegNo << ", .byte 0, .byte "
+ OS << "\t[encoding: .short " << LO.DwarfRegNum << ", .byte 0, .byte "
<< LO.Size << "]\n";
- OperIdx++;
+ Idx++;
}
}
}
/// Create a live-out register record for the given register Reg.
StackMaps::LiveOutReg
StackMaps::createLiveOutReg(unsigned Reg, const TargetRegisterInfo *TRI) const {
- unsigned RegNo = getDwarfRegNum(Reg, TRI);
+ unsigned DwarfRegNum = getDwarfRegNum(Reg, TRI);
unsigned Size = TRI->getMinimalPhysRegClass(Reg)->getSize();
- return LiveOutReg(Reg, RegNo, Size);
+ return LiveOutReg(Reg, DwarfRegNum, Size);
}
/// Parse the register live-out mask and return a vector of live-out registers
// We don't need to keep track of a register if its super-register is already
// in the list. Merge entries that refer to the same dwarf register and use
// the maximum size that needs to be spilled.
- std::sort(LiveOuts.begin(), LiveOuts.end());
- for (LiveOutVec::iterator I = LiveOuts.begin(), E = LiveOuts.end();
- I != E; ++I) {
- for (LiveOutVec::iterator II = std::next(I); II != E; ++II) {
- if (I->RegNo != II->RegNo) {
+
+ std::sort(LiveOuts.begin(), LiveOuts.end(),
+ [](const LiveOutReg &LHS, const LiveOutReg &RHS) {
+ // Only sort by the dwarf register number.
+ return LHS.DwarfRegNum < RHS.DwarfRegNum;
+ });
+
+ for (auto I = LiveOuts.begin(), E = LiveOuts.end(); I != E; ++I) {
+ for (auto II = std::next(I); II != E; ++II) {
+ if (I->DwarfRegNum != II->DwarfRegNum) {
// Skip all the now invalid entries.
I = --II;
break;
I->Size = std::max(I->Size, II->Size);
if (TRI->isSuperRegister(I->Reg, II->Reg))
I->Reg = II->Reg;
- II->MarkInvalid();
+ II->Reg = 0; // mark for deletion.
}
}
- LiveOuts.erase(std::remove_if(LiveOuts.begin(), LiveOuts.end(),
- LiveOutReg::IsInvalid), LiveOuts.end());
+
+ LiveOuts.erase(
+ std::remove_if(LiveOuts.begin(), LiveOuts.end(),
+ [](const LiveOutReg &LO) { return LO.Reg == 0; }),
+ LiveOuts.end());
+
return LiveOuts;
}
if (recordResult) {
assert(PatchPointOpers(&MI).hasDef() && "Stackmap has no return value.");
- parseOperand(MI.operands_begin(), std::next(MI.operands_begin()),
- Locations, LiveOuts);
+ parseOperand(MI.operands_begin(), std::next(MI.operands_begin()), Locations,
+ LiveOuts);
}
// Parse operands.
}
// Move large constants into the constant pool.
- for (LocationVec::iterator I = Locations.begin(), E = Locations.end();
- I != E; ++I) {
+ for (auto &Loc : Locations) {
// Constants are encoded as sign-extended integers.
// -1 is directly encoded as .long 0xFFFFFFFF with no constant pool.
- if (I->LocType == Location::Constant && !isInt<32>(I->Offset)) {
- I->LocType = Location::ConstantIndex;
+ if (Loc.Type == Location::Constant && !isInt<32>(Loc.Offset)) {
+ Loc.Type = Location::ConstantIndex;
// ConstPool is intentionally a MapVector of 'uint64_t's (as
// opposed to 'int64_t's). We should never be in a situation
// where we have to insert either the tombstone or the empty
// keys into a map, and for a DenseMap<uint64_t, T> these are
// (uint64_t)0 and (uint64_t)-1. They can be and are
// represented using 32 bit integers.
-
- assert((uint64_t)I->Offset != DenseMapInfo<uint64_t>::getEmptyKey() &&
- (uint64_t)I->Offset != DenseMapInfo<uint64_t>::getTombstoneKey() &&
+ assert((uint64_t)Loc.Offset != DenseMapInfo<uint64_t>::getEmptyKey() &&
+ (uint64_t)Loc.Offset !=
+ DenseMapInfo<uint64_t>::getTombstoneKey() &&
"empty and tombstone keys should fit in 32 bits!");
- auto Result = ConstPool.insert(std::make_pair(I->Offset, I->Offset));
- I->Offset = Result.first - ConstPool.begin();
+ auto Result = ConstPool.insert(std::make_pair(Loc.Offset, Loc.Offset));
+ Loc.Offset = Result.first - ConstPool.begin();
}
}
// Create an expression to calculate the offset of the callsite from function
// entry.
const MCExpr *CSOffsetExpr = MCBinaryExpr::createSub(
- MCSymbolRefExpr::create(MILabel, OutContext),
- MCSymbolRefExpr::create(AP.CurrentFnSymForSize, OutContext),
- OutContext);
+ MCSymbolRefExpr::create(MILabel, OutContext),
+ MCSymbolRefExpr::create(AP.CurrentFnSymForSize, OutContext), OutContext);
CSInfos.emplace_back(CSOffsetExpr, ID, std::move(Locations),
std::move(LiveOuts));
// Record the stack size of the current function.
const MachineFrameInfo *MFI = AP.MF->getFrameInfo();
const TargetRegisterInfo *RegInfo = AP.MF->getSubtarget().getRegisterInfo();
- const bool DynamicFrameSize = MFI->hasVarSizedObjects() ||
- RegInfo->needsStackRealignment(*(AP.MF));
+ bool HasDynamicFrameSize =
+ MFI->hasVarSizedObjects() || RegInfo->needsStackRealignment(*(AP.MF));
FnStackSize[AP.CurrentFnSym] =
- DynamicFrameSize ? UINT64_MAX : MFI->getStackSize();
+ HasDynamicFrameSize ? UINT64_MAX : MFI->getStackSize();
}
void StackMaps::recordStackMap(const MachineInstr &MI) {
PatchPointOpers opers(&MI);
int64_t ID = opers.getMetaOper(PatchPointOpers::IDPos).getImm();
- MachineInstr::const_mop_iterator MOI =
- std::next(MI.operands_begin(), opers.getStackMapStartIdx());
+ auto MOI = std::next(MI.operands_begin(), opers.getStackMapStartIdx());
recordStackMapOpers(MI, ID, MOI, MI.operands_end(),
opers.isAnyReg() && opers.hasDef());
#ifndef NDEBUG
// verify anyregcc
- LocationVec &Locations = CSInfos.back().Locations;
+ auto &Locations = CSInfos.back().Locations;
if (opers.isAnyReg()) {
unsigned NArgs = opers.getMetaOper(PatchPointOpers::NArgPos).getImm();
- for (unsigned i = 0, e = (opers.hasDef() ? NArgs+1 : NArgs); i != e; ++i)
- assert(Locations[i].LocType == Location::Register &&
+ for (unsigned i = 0, e = (opers.hasDef() ? NArgs + 1 : NArgs); i != e; ++i)
+ assert(Locations[i].Type == Location::Register &&
"anyreg arg must be in reg.");
}
#endif
}
void StackMaps::recordStatepoint(const MachineInstr &MI) {
- assert(MI.getOpcode() == TargetOpcode::STATEPOINT &&
- "expected statepoint");
+ assert(MI.getOpcode() == TargetOpcode::STATEPOINT && "expected statepoint");
StatepointOpers opers(&MI);
// Record all the deopt and gc operands (they're contiguous and run from the
void StackMaps::emitStackmapHeader(MCStreamer &OS) {
// Header.
OS.EmitIntValue(StackMapVersion, 1); // Version.
- OS.EmitIntValue(0, 1); // Reserved.
- OS.EmitIntValue(0, 2); // Reserved.
+ OS.EmitIntValue(0, 1); // Reserved.
+ OS.EmitIntValue(0, 2); // Reserved.
// Num functions.
DEBUG(dbgs() << WSMP << "#functions = " << FnStackSize.size() << '\n');
DEBUG(dbgs() << WSMP << "functions:\n");
for (auto const &FR : FnStackSize) {
DEBUG(dbgs() << WSMP << "function addr: " << FR.first
- << " frame size: " << FR.second);
+ << " frame size: " << FR.second);
OS.EmitSymbolValue(FR.first, 8);
OS.EmitIntValue(FR.second, 8);
}
void StackMaps::emitConstantPoolEntries(MCStreamer &OS) {
// Constant pool entries.
DEBUG(dbgs() << WSMP << "constants:\n");
- for (auto ConstEntry : ConstPool) {
+ for (const auto &ConstEntry : ConstPool) {
DEBUG(dbgs() << WSMP << ConstEntry.second << '\n');
OS.EmitIntValue(ConstEntry.second, 8);
}
OS.EmitIntValue(CSLocs.size(), 2);
for (const auto &Loc : CSLocs) {
- OS.EmitIntValue(Loc.LocType, 1);
+ OS.EmitIntValue(Loc.Type, 1);
OS.EmitIntValue(Loc.Size, 1);
OS.EmitIntValue(Loc.Reg, 2);
OS.EmitIntValue(Loc.Offset, 4);
OS.EmitIntValue(LiveOuts.size(), 2);
for (const auto &LO : LiveOuts) {
- OS.EmitIntValue(LO.RegNo, 2);
+ OS.EmitIntValue(LO.DwarfRegNum, 2);
OS.EmitIntValue(0, 1);
OS.EmitIntValue(LO.Size, 1);
}
/// Serialize the stackmap data.
void StackMaps::serializeToStackMapSection() {
- (void) WSMP;
+ (void)WSMP;
// Bail out if there's no stack map data.
assert((!CSInfos.empty() || (CSInfos.empty() && ConstPool.empty())) &&
"Expected empty constant pool too!");
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