#include "llvm/MC/MCSectionMachO.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/Support/CommandLine.h"
-#include "llvm/Support/Debug.h"
-#include "llvm/Support/raw_ostream.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOpcodes.h"
#include "llvm/Target/TargetRegisterInfo.h"
#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() &&
llvm_unreachable("Unsupported stackmap version!");
}
+/// 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);
+
+ assert(RegNo >= 0 && "Invalid Dwarf register number.");
+ return (unsigned)RegNo;
+}
+
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.getSubtargetImpl()->getDataLayout()->getPointerSizeInBits();
+ unsigned Size = AP.TM.getDataLayout()->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, Reg, Imm));
+ Locs.push_back(Location(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, Reg, Imm));
+ Locs.push_back(Location(StackMaps::Location::Indirect, Size,
+ getDwarfRegNum(Reg, TRI), Imm));
break;
}
case StackMaps::ConstantOp: {
assert(TargetRegisterInfo::isPhysicalRegister(MOI->getReg()) &&
"Virtreg operands should have been rewritten before now.");
- const TargetRegisterClass *RC =
- AP.TM.getSubtargetImpl()->getRegisterInfo()->getMinimalPhysRegClass(
- MOI->getReg());
+ const TargetRegisterClass *RC = TRI->getMinimalPhysRegClass(MOI->getReg());
assert(!MOI->getSubReg() && "Physical subreg still around.");
- Locs.push_back(
- Location(Location::Register, RC->getSize(), MOI->getReg(), 0));
+
+ unsigned Offset = 0;
+ unsigned RegNo = getDwarfRegNum(MOI->getReg(), TRI);
+ unsigned LLVMRegNo = TRI->getLLVMRegNum(RegNo, false);
+ unsigned SubRegIdx = TRI->getSubRegIndex(LLVMRegNo, MOI->getReg());
+ if (SubRegIdx)
+ Offset = TRI->getSubRegIdxOffset(SubRegIdx);
+
+ Locs.push_back(Location(Location::Register, RC->getSize(), RegNo, Offset));
return ++MOI;
}
return ++MOI;
}
-/// 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);
+void StackMaps::print(raw_ostream &OS) {
+ const TargetRegisterInfo *TRI =
+ AP.MF ? AP.MF->getSubtarget().getRegisterInfo() : nullptr;
+ OS << WSMP << "callsites:\n";
+ for (const auto &CSI : CSInfos) {
+ const LocationVec &CSLocs = CSI.Locations;
+ const LiveOutVec &LiveOuts = CSI.LiveOuts;
- assert(RegNo >= 0 && "Invalid Dwarf register number.");
- return (unsigned) RegNo;
+ OS << WSMP << "callsite " << CSI.ID << "\n";
+ OS << WSMP << " has " << CSLocs.size() << " locations\n";
+
+ unsigned OperIdx = 0;
+ for (const auto &Loc : CSLocs) {
+ OS << WSMP << " Loc " << OperIdx << ": ";
+ switch (Loc.LocType) {
+ case Location::Unprocessed:
+ OS << "<Unprocessed operand>";
+ break;
+ case Location::Register:
+ OS << "Register ";
+ if (TRI)
+ OS << TRI->getName(Loc.Reg);
+ else
+ OS << Loc.Reg;
+ break;
+ case Location::Direct:
+ OS << "Direct ";
+ if (TRI)
+ OS << TRI->getName(Loc.Reg);
+ else
+ OS << Loc.Reg;
+ if (Loc.Offset)
+ OS << " + " << Loc.Offset;
+ break;
+ case Location::Indirect:
+ OS << "Indirect ";
+ if (TRI)
+ OS << TRI->getName(Loc.Reg);
+ else
+ OS << Loc.Reg;
+ OS << "+" << Loc.Offset;
+ break;
+ case Location::Constant:
+ OS << "Constant " << Loc.Offset;
+ break;
+ case Location::ConstantIndex:
+ OS << "Constant Index " << Loc.Offset;
+ break;
+ }
+ OS << " [encoding: .byte " << Loc.LocType << ", .byte " << Loc.Size
+ << ", .short " << Loc.Reg << ", .int " << Loc.Offset << "]\n";
+ OperIdx++;
+ }
+
+ OS << WSMP << " has " << LiveOuts.size() << " live-out registers\n";
+
+ OperIdx = 0;
+ for (const auto &LO : LiveOuts) {
+ OS << WSMP << " LO " << OperIdx << ": ";
+ if (TRI)
+ OS << TRI->getName(LO.Reg);
+ else
+ OS << LO.Reg;
+ OS << " [encoding: .short " << LO.RegNo << ", .byte 0, .byte "
+ << LO.Size << "]\n";
+ OperIdx++;
+ }
+ }
}
/// Create a live-out register record for the given register Reg.
StackMaps::LiveOutVec
StackMaps::parseRegisterLiveOutMask(const uint32_t *Mask) const {
assert(Mask && "No register mask specified");
- const TargetRegisterInfo *TRI = AP.TM.getSubtargetImpl()->getRegisterInfo();
+ const TargetRegisterInfo *TRI = AP.MF->getSubtarget().getRegisterInfo();
LiveOutVec LiveOuts;
// Create a LiveOutReg for each bit that is set in the register mask.
// 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 I = LiveOuts.begin(), E = LiveOuts.end(); I != E;
+ ++I) {
for (LiveOutVec::iterator II = std::next(I); II != E; ++II) {
if (I->RegNo != II->RegNo) {
// Skip all the now invalid entries.
II->MarkInvalid();
}
}
- LiveOuts.erase(std::remove_if(LiveOuts.begin(), LiveOuts.end(),
- LiveOutReg::IsInvalid), LiveOuts.end());
+ LiveOuts.erase(
+ std::remove_if(LiveOuts.begin(), LiveOuts.end(), LiveOutReg::IsInvalid),
+ LiveOuts.end());
return LiveOuts;
}
MachineInstr::const_mop_iterator MOE,
bool recordResult) {
- MCContext &OutContext = AP.OutStreamer.getContext();
- MCSymbol *MILabel = OutContext.CreateTempSymbol();
- AP.OutStreamer.EmitLabel(MILabel);
+ MCContext &OutContext = AP.OutStreamer->getContext();
+ MCSymbol *MILabel = OutContext.createTempSymbol();
+ AP.OutStreamer->EmitLabel(MILabel);
LocationVec Locations;
LiveOutVec 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 (LocationVec::iterator I = Locations.begin(), E = Locations.end(); I != E;
+ ++I) {
// Constants are encoded as sign-extended integers.
// -1 is directly encoded as .long 0xFFFFFFFF with no constant pool.
- if (I->LocType == Location::Constant &&
- ((I->Offset + (int64_t(1)<<31)) >> 32) != 0) {
+ if (I->LocType == Location::Constant && !isInt<32>(I->Offset)) {
I->LocType = 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() &&
+ "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();
}
// 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.CurrentFnSym, OutContext),
- OutContext);
+ const MCExpr *CSOffsetExpr = MCBinaryExpr::createSub(
+ MCSymbolRefExpr::create(MILabel, OutContext),
+ MCSymbolRefExpr::create(AP.CurrentFnSymForSize, OutContext), OutContext);
- CSInfos.push_back(CallsiteInfo(CSOffsetExpr, ID, Locations, LiveOuts));
+ 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));
+ const bool DynamicFrameSize =
+ MFI->hasVarSizedObjects() || RegInfo->needsStackRealignment(*(AP.MF));
FnStackSize[AP.CurrentFnSym] =
- DynamicFrameSize ? UINT64_MAX : MFI->getStackSize();
+ DynamicFrameSize ? UINT64_MAX : MFI->getStackSize();
}
void StackMaps::recordStackMap(const MachineInstr &MI) {
int64_t ID = opers.getMetaOper(PatchPointOpers::IDPos).getImm();
MachineInstr::const_mop_iterator MOI =
- std::next(MI.operands_begin(), opers.getStackMapStartIdx());
+ std::next(MI.operands_begin(), opers.getStackMapStartIdx());
recordStackMapOpers(MI, ID, MOI, MI.operands_end(),
opers.isAnyReg() && opers.hasDef());
LocationVec &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)
+ for (unsigned i = 0, e = (opers.hasDef() ? NArgs + 1 : NArgs); i != e; ++i)
assert(Locations[i].LocType == Location::Register &&
"anyreg arg must be in reg.");
}
#endif
}
+void StackMaps::recordStatepoint(const MachineInstr &MI) {
+ assert(MI.getOpcode() == TargetOpcode::STATEPOINT && "expected statepoint");
+
+ StatepointOpers opers(&MI);
+ // Record all the deopt and gc operands (they're contiguous and run from the
+ // initial index to the end of the operand list)
+ const unsigned StartIdx = opers.getVarIdx();
+ recordStackMapOpers(MI, opers.getID(), MI.operands_begin() + StartIdx,
+ MI.operands_end(), false);
+}
/// Emit the stackmap header.
///
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);
}
/// 0x3, Indirect, [Reg + Offset] (spilled value)
/// 0x4, Constant, Offset (small constant)
/// 0x5, ConstIndex, Constants[Offset] (large constant)
-void StackMaps::emitCallsiteEntries(MCStreamer &OS,
- const TargetRegisterInfo *TRI) {
+void StackMaps::emitCallsiteEntries(MCStreamer &OS) {
+ DEBUG(print(dbgs()));
// Callsite entries.
- DEBUG(dbgs() << WSMP << "callsites:\n");
for (const auto &CSI : CSInfos) {
const LocationVec &CSLocs = CSI.Locations;
const LiveOutVec &LiveOuts = CSI.LiveOuts;
- DEBUG(dbgs() << WSMP << "callsite " << CSI.ID << "\n");
-
// Verify stack map entry. It's better to communicate a problem to the
// runtime than crash in case of in-process compilation. Currently, we do
// simple overflow checks, but we may eventually communicate other
// Reserved for flags.
OS.EmitIntValue(0, 2);
-
- DEBUG(dbgs() << WSMP << " has " << CSLocs.size() << " locations\n");
-
OS.EmitIntValue(CSLocs.size(), 2);
- unsigned OperIdx = 0;
for (const auto &Loc : CSLocs) {
- unsigned RegNo = 0;
- int Offset = Loc.Offset;
- if(Loc.Reg) {
- RegNo = getDwarfRegNum(Loc.Reg, TRI);
-
- // If this is a register location, put the subregister byte offset in
- // the location offset.
- if (Loc.LocType == Location::Register) {
- assert(!Loc.Offset && "Register location should have zero offset");
- unsigned LLVMRegNo = TRI->getLLVMRegNum(RegNo, false);
- unsigned SubRegIdx = TRI->getSubRegIndex(LLVMRegNo, Loc.Reg);
- if (SubRegIdx)
- Offset = TRI->getSubRegIdxOffset(SubRegIdx);
- }
- }
- else {
- assert(Loc.LocType != Location::Register &&
- "Missing location register");
- }
-
- DEBUG(dbgs() << WSMP << " Loc " << OperIdx << ": ";
- switch (Loc.LocType) {
- case Location::Unprocessed:
- dbgs() << "<Unprocessed operand>";
- break;
- case Location::Register:
- dbgs() << "Register " << TRI->getName(Loc.Reg);
- break;
- case Location::Direct:
- dbgs() << "Direct " << TRI->getName(Loc.Reg);
- if (Loc.Offset)
- dbgs() << " + " << Loc.Offset;
- break;
- case Location::Indirect:
- dbgs() << "Indirect " << TRI->getName(Loc.Reg)
- << " + " << Loc.Offset;
- break;
- case Location::Constant:
- dbgs() << "Constant " << Loc.Offset;
- break;
- case Location::ConstantIndex:
- dbgs() << "Constant Index " << Loc.Offset;
- break;
- }
- dbgs() << " [encoding: .byte " << Loc.LocType
- << ", .byte " << Loc.Size
- << ", .short " << RegNo
- << ", .int " << Offset << "]\n";
- );
-
OS.EmitIntValue(Loc.LocType, 1);
OS.EmitIntValue(Loc.Size, 1);
- OS.EmitIntValue(RegNo, 2);
- OS.EmitIntValue(Offset, 4);
- OperIdx++;
+ OS.EmitIntValue(Loc.Reg, 2);
+ OS.EmitIntValue(Loc.Offset, 4);
}
- DEBUG(dbgs() << WSMP << " has " << LiveOuts.size()
- << " live-out registers\n");
-
// Num live-out registers and padding to align to 4 byte.
OS.EmitIntValue(0, 2);
OS.EmitIntValue(LiveOuts.size(), 2);
- OperIdx = 0;
for (const auto &LO : LiveOuts) {
- DEBUG(dbgs() << WSMP << " LO " << OperIdx << ": "
- << TRI->getName(LO.Reg)
- << " [encoding: .short " << LO.RegNo
- << ", .byte 0, .byte " << LO.Size << "]\n");
OS.EmitIntValue(LO.RegNo, 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!");
if (CSInfos.empty())
return;
- MCContext &OutContext = AP.OutStreamer.getContext();
- MCStreamer &OS = AP.OutStreamer;
- const TargetRegisterInfo *TRI = AP.TM.getSubtargetImpl()->getRegisterInfo();
+ MCContext &OutContext = AP.OutStreamer->getContext();
+ MCStreamer &OS = *AP.OutStreamer;
// Create the section.
- const MCSection *StackMapSection =
- OutContext.getObjectFileInfo()->getStackMapSection();
+ MCSection *StackMapSection =
+ OutContext.getObjectFileInfo()->getStackMapSection();
OS.SwitchSection(StackMapSection);
// Emit a dummy symbol to force section inclusion.
- OS.EmitLabel(OutContext.GetOrCreateSymbol(Twine("__LLVM_StackMaps")));
+ OS.EmitLabel(OutContext.getOrCreateSymbol(Twine("__LLVM_StackMaps")));
// Serialize data.
DEBUG(dbgs() << "********** Stack Map Output **********\n");
emitStackmapHeader(OS);
emitFunctionFrameRecords(OS);
emitConstantPoolEntries(OS);
- emitCallsiteEntries(OS, TRI);
+ emitCallsiteEntries(OS);
OS.AddBlankLine();
// Clean up.
projects / oota-llvm.git / blobdiff