There are two forms for label debug information in DWARF format.
1. Labels in a non-inlined function:
DW_TAG_label
DW_AT_name
DW_AT_decl_file
DW_AT_decl_line
DW_AT_low_pc
2. Labels in an inlined function:
DW_TAG_label
DW_AT_abstract_origin
DW_AT_low_pc
We will collect label information from DBG_LABEL. Before every DBG_LABEL,
we will generate a temporary symbol to denote the location of the label.
The symbol could be used to get DW_AT_low_pc afterwards. So, we create a
mapping between 'inlined label' and DBG_LABEL MachineInstr in DebugHandlerBase.
The DBG_LABEL in the mapping is used to query the symbol before it.
The AbstractLabels in DwarfCompileUnit is used to process labels in inlined
functions.
We also keep a mapping between scope and labels in DwarfFile to help to
generate correct tree structure of DIEs.
Differential Revision: https://reviews.llvm.org/D45556
Patch by Hsiangkai Wang.
llvm-svn: 337799
// Handle the special instrinsic instruction classes.
RetTy visitDbgDeclareInst(DbgDeclareInst &I) { DELEGATE(DbgInfoIntrinsic);}
RetTy visitDbgValueInst(DbgValueInst &I) { DELEGATE(DbgInfoIntrinsic);}
- RetTy visitDbgLabelInst(DbgLabelInst &I) { DELEGATE(DbgInfoIntrinsic);}
+ RetTy visitDbgLabelInst(DbgLabelInst &I) { DELEGATE(IntrinsicInst);}
RetTy visitDbgInfoIntrinsic(DbgInfoIntrinsic &I) { DELEGATE(IntrinsicInst); }
RetTy visitMemSetInst(MemSetInst &I) { DELEGATE(MemIntrinsic); }
RetTy visitMemCpyInst(MemCpyInst &I) { DELEGATE(MemTransferInst); }
case Intrinsic::dbg_declare:
case Intrinsic::dbg_value:
case Intrinsic::dbg_addr:
- case Intrinsic::dbg_label:
return true;
default: return false;
}
};
/// This represents the llvm.dbg.label instruction.
- class DbgLabelInst : public DbgInfoIntrinsic {
+ class DbgLabelInst : public IntrinsicInst {
public:
DILabel *getLabel() const {
return cast<DILabel>(getRawVariable());
AsmPrinter.cpp
AsmPrinterDwarf.cpp
AsmPrinterInlineAsm.cpp
- DbgValueHistoryCalculator.cpp
+ DbgEntityHistoryCalculator.cpp
DebugHandlerBase.cpp
DebugLocStream.cpp
DIE.cpp
#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_CODEVIEWDEBUG_H
#define LLVM_LIB_CODEGEN_ASMPRINTER_CODEVIEWDEBUG_H
-#include "DbgValueHistoryCalculator.h"
+#include "DbgEntityHistoryCalculator.h"
#include "DebugHandlerBase.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
-//===- llvm/CodeGen/AsmPrinter/DbgValueHistoryCalculator.cpp --------------===//
+//===- llvm/CodeGen/AsmPrinter/DbgEntityHistoryCalculator.cpp -------------===//
//
// The LLVM Compiler Infrastructure
//
//
//===----------------------------------------------------------------------===//
-#include "DbgValueHistoryCalculator.h"
+#include "DbgEntityHistoryCalculator.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
return isDescribedByReg(*Ranges.back().first);
}
+void DbgLabelInstrMap::addInstr(InlinedLabel Label, const MachineInstr &MI) {
+ assert(MI.isDebugLabel() && "not a DBG_LABEL");
+ LabelInstr[Label] = &MI;
+}
+
namespace {
// Maps physreg numbers to the variables they describe.
using InlinedVariable = DbgValueHistoryMap::InlinedVariable;
using RegDescribedVarsMap = std::map<unsigned, SmallVector<InlinedVariable, 1>>;
+using InlinedLabel = DbgLabelInstrMap::InlinedLabel;
} // end anonymous namespace
}
}
-void llvm::calculateDbgValueHistory(const MachineFunction *MF,
- const TargetRegisterInfo *TRI,
- DbgValueHistoryMap &Result) {
+void llvm::calculateDbgEntityHistory(const MachineFunction *MF,
+ const TargetRegisterInfo *TRI,
+ DbgValueHistoryMap &DbgValues,
+ DbgLabelInstrMap &DbgLabels) {
BitVector ChangingRegs(TRI->getNumRegs());
collectChangingRegs(MF, TRI, ChangingRegs);
// If this is a virtual register, only clobber it since it doesn't
// have aliases.
if (TRI->isVirtualRegister(MO.getReg()))
- clobberRegisterUses(RegVars, MO.getReg(), Result, MI);
+ clobberRegisterUses(RegVars, MO.getReg(), DbgValues, MI);
// If this is a register def operand, it may end a debug value
// range.
else {
for (MCRegAliasIterator AI(MO.getReg(), TRI, true); AI.isValid();
++AI)
if (ChangingRegs.test(*AI))
- clobberRegisterUses(RegVars, *AI, Result, MI);
+ clobberRegisterUses(RegVars, *AI, DbgValues, MI);
}
} else if (MO.isRegMask()) {
// If this is a register mask operand, clobber all debug values in
// Don't consider SP to be clobbered by register masks.
if (unsigned(I) != SP && TRI->isPhysicalRegister(I) &&
MO.clobbersPhysReg(I)) {
- clobberRegisterUses(RegVars, I, Result, MI);
+ clobberRegisterUses(RegVars, I, DbgValues, MI);
}
}
}
continue;
}
- // Skip DBG_LABEL instructions.
- if (MI.isDebugLabel())
- continue;
-
- assert(MI.getNumOperands() > 1 && "Invalid DBG_VALUE instruction!");
- // Use the base variable (without any DW_OP_piece expressions)
- // as index into History. The full variables including the
- // piece expressions are attached to the MI.
- const DILocalVariable *RawVar = MI.getDebugVariable();
- assert(RawVar->isValidLocationForIntrinsic(MI.getDebugLoc()) &&
- "Expected inlined-at fields to agree");
- InlinedVariable Var(RawVar, MI.getDebugLoc()->getInlinedAt());
-
- if (unsigned PrevReg = Result.getRegisterForVar(Var))
- dropRegDescribedVar(RegVars, PrevReg, Var);
-
- Result.startInstrRange(Var, MI);
-
- if (unsigned NewReg = isDescribedByReg(MI))
- addRegDescribedVar(RegVars, NewReg, Var);
+ if (MI.isDebugValue()) {
+ assert(MI.getNumOperands() > 1 && "Invalid DBG_VALUE instruction!");
+ // Use the base variable (without any DW_OP_piece expressions)
+ // as index into History. The full variables including the
+ // piece expressions are attached to the MI.
+ const DILocalVariable *RawVar = MI.getDebugVariable();
+ assert(RawVar->isValidLocationForIntrinsic(MI.getDebugLoc()) &&
+ "Expected inlined-at fields to agree");
+ InlinedVariable Var(RawVar, MI.getDebugLoc()->getInlinedAt());
+
+ if (unsigned PrevReg = DbgValues.getRegisterForVar(Var))
+ dropRegDescribedVar(RegVars, PrevReg, Var);
+
+ DbgValues.startInstrRange(Var, MI);
+
+ if (unsigned NewReg = isDescribedByReg(MI))
+ addRegDescribedVar(RegVars, NewReg, Var);
+ } else if (MI.isDebugLabel()) {
+ assert(MI.getNumOperands() == 1 && "Invalid DBG_LABEL instruction!");
+ const DILabel *RawLabel = MI.getDebugLabel();
+ assert(RawLabel->isValidLocationForIntrinsic(MI.getDebugLoc()) &&
+ "Expected inlined-at fields to agree");
+ // When collecting debug information for labels, there is no MCSymbol
+ // generated for it. So, we keep MachineInstr in DbgLabels in order
+ // to query MCSymbol afterward.
+ InlinedLabel L(RawLabel, MI.getDebugLoc()->getInlinedAt());
+ DbgLabels.addInstr(L, MI);
+ }
}
// Make sure locations for register-described variables are valid only
auto CurElem = I++; // CurElem can be erased below.
if (TRI->isVirtualRegister(CurElem->first) ||
ChangingRegs.test(CurElem->first))
- clobberRegisterUses(RegVars, CurElem, Result, MBB.back());
+ clobberRegisterUses(RegVars, CurElem, DbgValues, MBB.back());
}
}
}
-//===- llvm/CodeGen/AsmPrinter/DbgValueHistoryCalculator.h ------*- C++ -*-===//
+//===- llvm/CodeGen/AsmPrinter/DbgEntityHistoryCalculator.h -----*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
#endif
};
-void calculateDbgValueHistory(const MachineFunction *MF,
- const TargetRegisterInfo *TRI,
- DbgValueHistoryMap &Result);
+/// For each inlined instance of a source-level label, keep the corresponding
+/// DBG_LABEL instruction. The DBG_LABEL instruction could be used to generate
+/// a temporary (assembler) label before it.
+class DbgLabelInstrMap {
+public:
+ using InlinedLabel = std::pair<const DILabel *, const DILocation *>;
+ using InstrMap = MapVector<InlinedLabel, const MachineInstr *>;
+
+private:
+ InstrMap LabelInstr;
+
+public:
+ void addInstr(InlinedLabel Label, const MachineInstr &MI);
+
+ bool empty() const { return LabelInstr.empty(); }
+ void clear() { LabelInstr.clear(); }
+ InstrMap::const_iterator begin() const { return LabelInstr.begin(); }
+ InstrMap::const_iterator end() const { return LabelInstr.end(); }
+};
+
+void calculateDbgEntityHistory(const MachineFunction *MF,
+ const TargetRegisterInfo *TRI,
+ DbgValueHistoryMap &DbgValues,
+ DbgLabelInstrMap &DbgLabels);
} // end namespace llvm
// Calculate history for local variables.
assert(DbgValues.empty() && "DbgValues map wasn't cleaned!");
- calculateDbgValueHistory(MF, Asm->MF->getSubtarget().getRegisterInfo(),
- DbgValues);
+ assert(DbgLabels.empty() && "DbgLabels map wasn't cleaned!");
+ calculateDbgEntityHistory(MF, Asm->MF->getSubtarget().getRegisterInfo(),
+ DbgValues, DbgLabels);
LLVM_DEBUG(DbgValues.dump());
// Request labels for the full history.
}
}
+ // Ensure there is a symbol before DBG_LABEL.
+ for (const auto &I : DbgLabels) {
+ const MachineInstr *MI = I.second;
+ requestLabelBeforeInsn(MI);
+ }
+
PrevInstLoc = DebugLoc();
PrevLabel = Asm->getFunctionBegin();
beginFunctionImpl(MF);
if (hasDebugInfo(MMI, MF))
endFunctionImpl(MF);
DbgValues.clear();
+ DbgLabels.clear();
LabelsBeforeInsn.clear();
LabelsAfterInsn.clear();
}
#define LLVM_LIB_CODEGEN_ASMPRINTER_DEBUGHANDLERBASE_H
#include "AsmPrinterHandler.h"
-#include "DbgValueHistoryCalculator.h"
+#include "DbgEntityHistoryCalculator.h"
#include "llvm/ADT/Optional.h"
#include "llvm/CodeGen/LexicalScopes.h"
#include "llvm/CodeGen/MachineInstr.h"
/// variable. Variables are listed in order of appearance.
DbgValueHistoryMap DbgValues;
+ /// Mapping of inlined labels and DBG_LABEL machine instruction.
+ DbgLabelInstrMap DbgLabels;
+
/// Maps instruction with label emitted before instruction.
/// FIXME: Make this private from DwarfDebug, we have the necessary accessors
/// for it.
return D;
}
+DIE *DwarfCompileUnit::constructLabelDIE(DbgLabel &DL,
+ const LexicalScope &Scope) {
+ auto LabelDie = DIE::get(DIEValueAllocator, DL.getTag());
+ insertDIE(DL.getLabel(), LabelDie);
+ DL.setDIE(*LabelDie);
+
+ if (Scope.isAbstractScope())
+ applyLabelAttributes(DL, *LabelDie);
+
+ return LabelDie;
+}
+
DIE *DwarfCompileUnit::constructVariableDIEImpl(const DbgVariable &DV,
bool Abstract) {
// Define variable debug information entry.
if (HasNonScopeChildren)
*HasNonScopeChildren = !Children.empty();
+ for (DbgLabel *DL : DU->getScopeLabels().lookup(Scope))
+ Children.push_back(constructLabelDIE(*DL, *Scope));
+
for (LexicalScope *LS : Scope->getChildren())
constructScopeDIE(LS, Children);
}
}
-void DwarfCompileUnit::finishVariableDefinition(const DbgVariable &Var) {
- DbgVariable *AbsVar = getExistingAbstractVariable(
- InlinedVariable(Var.getVariable(), Var.getInlinedAt()));
- auto *VariableDie = Var.getDIE();
- if (AbsVar && AbsVar->getDIE()) {
- addDIEEntry(*VariableDie, dwarf::DW_AT_abstract_origin,
- *AbsVar->getDIE());
- } else
- applyVariableAttributes(Var, *VariableDie);
-}
+void DwarfCompileUnit::finishEntityDefinition(const DbgEntity *Entity) {
+ DbgEntity *AbsEntity = getExistingAbstractEntity(Entity->getEntity());
-DbgVariable *DwarfCompileUnit::getExistingAbstractVariable(InlinedVariable IV) {
- const DILocalVariable *Cleansed;
- return getExistingAbstractVariable(IV, Cleansed);
+ auto *Die = Entity->getDIE();
+ /// Label may be used to generate DW_AT_low_pc, so put it outside
+ /// if/else block.
+ const DbgLabel *Label = nullptr;
+ if (AbsEntity && AbsEntity->getDIE()) {
+ addDIEEntry(*Die, dwarf::DW_AT_abstract_origin, *AbsEntity->getDIE());
+ Label = dyn_cast<const DbgLabel>(Entity);
+ } else {
+ if (const DbgVariable *Var = dyn_cast<const DbgVariable>(Entity))
+ applyVariableAttributes(*Var, *Die);
+ else if ((Label = dyn_cast<const DbgLabel>(Entity)))
+ applyLabelAttributes(*Label, *Die);
+ else
+ llvm_unreachable("DbgEntity must be DbgVariable or DbgLabel.");
+ }
+
+ if (Label) {
+ const MCSymbol *Sym = Label->getSymbol();
+ addLabelAddress(*Die, dwarf::DW_AT_low_pc, Sym);
+ }
}
-// Find abstract variable, if any, associated with Var.
-DbgVariable *DwarfCompileUnit::getExistingAbstractVariable(
- InlinedVariable IV, const DILocalVariable *&Cleansed) {
- // More then one inlined variable corresponds to one abstract variable.
- Cleansed = IV.first;
- auto &AbstractVariables = getAbstractVariables();
- auto I = AbstractVariables.find(Cleansed);
- if (I != AbstractVariables.end())
+DbgEntity *DwarfCompileUnit::getExistingAbstractEntity(const DINode *Node) {
+ auto &AbstractEntities = getAbstractEntities();
+ auto I = AbstractEntities.find(Node);
+ if (I != AbstractEntities.end())
return I->second.get();
return nullptr;
}
-void DwarfCompileUnit::createAbstractVariable(const DILocalVariable *Var,
- LexicalScope *Scope) {
+void DwarfCompileUnit::createAbstractEntity(const DINode *Node,
+ LexicalScope *Scope) {
assert(Scope && Scope->isAbstractScope());
- auto AbsDbgVariable = llvm::make_unique<DbgVariable>(Var, /* IA */ nullptr);
- DU->addScopeVariable(Scope, AbsDbgVariable.get());
- getAbstractVariables()[Var] = std::move(AbsDbgVariable);
+ auto &Entity = getAbstractEntities()[Node];
+ if (isa<const DILocalVariable>(Node)) {
+ Entity = llvm::make_unique<DbgVariable>(
+ cast<const DILocalVariable>(Node), nullptr /* IA */);;
+ DU->addScopeVariable(Scope, cast<DbgVariable>(Entity.get()));
+ } else if (isa<const DILabel>(Node)) {
+ Entity = llvm::make_unique<DbgLabel>(
+ cast<const DILabel>(Node), nullptr /* IA */);
+ DU->addScopeLabel(Scope, cast<DbgLabel>(Entity.get()));
+ }
}
void DwarfCompileUnit::emitHeader(bool UseOffsets) {
addFlag(VariableDie, dwarf::DW_AT_artificial);
}
+void DwarfCompileUnit::applyLabelAttributes(const DbgLabel &Label,
+ DIE &LabelDie) {
+ StringRef Name = Label.getName();
+ if (!Name.empty())
+ addString(LabelDie, dwarf::DW_AT_name, Name);
+ const auto *DILabel = Label.getLabel();
+ addSourceLine(LabelDie, DILabel);
+}
+
/// Add a Dwarf expression attribute data and value.
void DwarfCompileUnit::addExpr(DIELoc &Die, dwarf::Form Form,
const MCExpr *Expr) {
#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFCOMPILEUNIT_H
#define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFCOMPILEUNIT_H
-#include "DbgValueHistoryCalculator.h"
+#include "DbgEntityHistoryCalculator.h"
#include "DwarfDebug.h"
#include "DwarfUnit.h"
#include "llvm/ADT/ArrayRef.h"
const MCSymbol *BaseAddress = nullptr;
DenseMap<const MDNode *, DIE *> AbstractSPDies;
- DenseMap<const MDNode *, std::unique_ptr<DbgVariable>> AbstractVariables;
+ DenseMap<const DINode *, std::unique_ptr<DbgEntity>> AbstractEntities;
/// DWO ID for correlating skeleton and split units.
uint64_t DWOId = 0;
return DU->getAbstractSPDies();
}
- DenseMap<const MDNode *, std::unique_ptr<DbgVariable>> &getAbstractVariables() {
+ DenseMap<const DINode *, std::unique_ptr<DbgEntity>> &getAbstractEntities() {
if (isDwoUnit() && !DD->shareAcrossDWOCUs())
- return AbstractVariables;
- return DU->getAbstractVariables();
+ return AbstractEntities;
+ return DU->getAbstractEntities();
}
public:
DIE *constructVariableDIE(DbgVariable &DV, const LexicalScope &Scope,
DIE *&ObjectPointer);
+ /// Construct a DIE for the given DbgLabel.
+ DIE *constructLabelDIE(DbgLabel &DL, const LexicalScope &Scope);
+
/// A helper function to create children of a Scope DIE.
DIE *createScopeChildrenDIE(LexicalScope *Scope,
SmallVectorImpl<DIE *> &Children,
DIE *constructImportedEntityDIE(const DIImportedEntity *Module);
void finishSubprogramDefinition(const DISubprogram *SP);
- void finishVariableDefinition(const DbgVariable &Var);
+ void finishEntityDefinition(const DbgEntity *Entity);
/// Find abstract variable associated with Var.
using InlinedVariable = DbgValueHistoryMap::InlinedVariable;
- DbgVariable *getExistingAbstractVariable(InlinedVariable IV,
- const DILocalVariable *&Cleansed);
- DbgVariable *getExistingAbstractVariable(InlinedVariable IV);
- void createAbstractVariable(const DILocalVariable *Var, LexicalScope *Scope);
+ DbgEntity *getExistingAbstractEntity(const DINode *Node);
+ void createAbstractEntity(const DINode *Node, LexicalScope *Scope);
/// Set the skeleton unit associated with this unit.
void setSkeleton(DwarfCompileUnit &Skel) { Skeleton = &Skel; }
void applySubprogramAttributesToDefinition(const DISubprogram *SP,
DIE &SPDie);
+ void applyLabelAttributes(const DbgLabel &Label, DIE &LabelDie);
+
/// getRangeLists - Get the vector of range lists.
const SmallVectorImpl<RangeSpanList> &getRangeLists() const {
return (Skeleton ? Skeleton : this)->CURangeLists;
}
bool DbgVariable::isBlockByrefVariable() const {
- assert(Var && "Invalid complex DbgVariable!");
- return Var->getType().resolve()->isBlockByrefStruct();
+ assert(getVariable() && "Invalid complex DbgVariable!");
+ return getVariable()->getType().resolve()->isBlockByrefStruct();
}
const DIType *DbgVariable::getType() const {
- DIType *Ty = Var->getType().resolve();
+ DIType *Ty = getVariable()->getType().resolve();
// FIXME: isBlockByrefVariable should be reformulated in terms of complex
// addresses instead.
if (Ty->isBlockByrefStruct()) {
void DbgVariable::addMMIEntry(const DbgVariable &V) {
assert(DebugLocListIndex == ~0U && !MInsn && "not an MMI entry");
assert(V.DebugLocListIndex == ~0U && !V.MInsn && "not an MMI entry");
- assert(V.Var == Var && "conflicting variable");
- assert(V.IA == IA && "conflicting inlined-at location");
+ assert(V.getVariable() == getVariable() && "conflicting variable");
+ assert(V.getInlinedAt() == getInlinedAt() && "conflicting inlined-at location");
assert(!FrameIndexExprs.empty() && "Expected an MMI entry");
assert(!V.FrameIndexExprs.empty() && "Expected an MMI entry");
}
}
-void DwarfDebug::finishVariableDefinitions() {
- for (const auto &Var : ConcreteVariables) {
- DIE *VariableDie = Var->getDIE();
- assert(VariableDie);
+void DwarfDebug::finishEntityDefinitions() {
+ for (const auto &Entity : ConcreteEntities) {
+ DIE *Die = Entity->getDIE();
+ assert(Die);
// FIXME: Consider the time-space tradeoff of just storing the unit pointer
- // in the ConcreteVariables list, rather than looking it up again here.
+ // in the ConcreteEntities list, rather than looking it up again here.
// DIE::getUnit isn't simple - it walks parent pointers, etc.
- DwarfCompileUnit *Unit = CUDieMap.lookup(VariableDie->getUnitDie());
+ DwarfCompileUnit *Unit = CUDieMap.lookup(Die->getUnitDie());
assert(Unit);
- Unit->finishVariableDefinition(*Var);
+ Unit->finishEntityDefinition(Entity.get());
}
}
finishSubprogramDefinitions();
- finishVariableDefinitions();
+ finishEntityDefinitions();
// Include the DWO file name in the hash if there's more than one CU.
// This handles ThinLTO's situation where imported CUs may very easily be
// FIXME: AbstractVariables.clear();
}
-void DwarfDebug::ensureAbstractVariableIsCreated(DwarfCompileUnit &CU, InlinedVariable IV,
- const MDNode *ScopeNode) {
- const DILocalVariable *Cleansed = nullptr;
- if (CU.getExistingAbstractVariable(IV, Cleansed))
+void DwarfDebug::ensureAbstractEntityIsCreated(DwarfCompileUnit &CU,
+ const DINode *Node,
+ const MDNode *ScopeNode) {
+ if (CU.getExistingAbstractEntity(Node))
return;
- CU.createAbstractVariable(Cleansed, LScopes.getOrCreateAbstractScope(
+ CU.createAbstractEntity(Node, LScopes.getOrCreateAbstractScope(
cast<DILocalScope>(ScopeNode)));
}
-void DwarfDebug::ensureAbstractVariableIsCreatedIfScoped(DwarfCompileUnit &CU,
- InlinedVariable IV, const MDNode *ScopeNode) {
- const DILocalVariable *Cleansed = nullptr;
- if (CU.getExistingAbstractVariable(IV, Cleansed))
+void DwarfDebug::ensureAbstractEntityIsCreatedIfScoped(DwarfCompileUnit &CU,
+ const DINode *Node, const MDNode *ScopeNode) {
+ if (CU.getExistingAbstractEntity(Node))
return;
if (LexicalScope *Scope =
LScopes.findAbstractScope(cast_or_null<DILocalScope>(ScopeNode)))
- CU.createAbstractVariable(Cleansed, Scope);
+ CU.createAbstractEntity(Node, Scope);
}
// Collect variable information from side table maintained by MF.
if (!Scope)
continue;
- ensureAbstractVariableIsCreatedIfScoped(TheCU, Var, Scope->getScopeNode());
+ ensureAbstractEntityIsCreatedIfScoped(TheCU, Var.first, Scope->getScopeNode());
auto RegVar = llvm::make_unique<DbgVariable>(Var.first, Var.second);
RegVar->initializeMMI(VI.Expr, VI.Slot);
if (DbgVariable *DbgVar = MFVars.lookup(Var))
DbgVar->addMMIEntry(*RegVar);
else if (InfoHolder.addScopeVariable(Scope, RegVar.get())) {
MFVars.insert({Var, RegVar.get()});
- ConcreteVariables.push_back(std::move(RegVar));
+ ConcreteEntities.push_back(std::move(RegVar));
}
}
}
}
}
-DbgVariable *DwarfDebug::createConcreteVariable(DwarfCompileUnit &TheCU,
- LexicalScope &Scope,
- InlinedVariable IV) {
- ensureAbstractVariableIsCreatedIfScoped(TheCU, IV, Scope.getScopeNode());
- ConcreteVariables.push_back(
- llvm::make_unique<DbgVariable>(IV.first, IV.second));
- InfoHolder.addScopeVariable(&Scope, ConcreteVariables.back().get());
- return ConcreteVariables.back().get();
+DbgEntity *DwarfDebug::createConcreteEntity(DwarfCompileUnit &TheCU,
+ LexicalScope &Scope,
+ const DINode *Node,
+ const DILocation *Location,
+ const MCSymbol *Sym) {
+ ensureAbstractEntityIsCreatedIfScoped(TheCU, Node, Scope.getScopeNode());
+ if (isa<const DILocalVariable>(Node)) {
+ ConcreteEntities.push_back(
+ llvm::make_unique<DbgVariable>(cast<const DILocalVariable>(Node),
+ Location));
+ InfoHolder.addScopeVariable(&Scope,
+ cast<DbgVariable>(ConcreteEntities.back().get()));
+ } else if (isa<const DILabel>(Node)) {
+ ConcreteEntities.push_back(
+ llvm::make_unique<DbgLabel>(cast<const DILabel>(Node),
+ Location, Sym));
+ InfoHolder.addScopeLabel(&Scope,
+ cast<DbgLabel>(ConcreteEntities.back().get()));
+ }
+ return ConcreteEntities.back().get();
}
/// Determine whether a *singular* DBG_VALUE is valid for the entirety of its
}
// Find variables for each lexical scope.
-void DwarfDebug::collectVariableInfo(DwarfCompileUnit &TheCU,
- const DISubprogram *SP,
- DenseSet<InlinedVariable> &Processed) {
+void DwarfDebug::collectEntityInfo(DwarfCompileUnit &TheCU,
+ const DISubprogram *SP,
+ DenseSet<InlinedVariable> &Processed) {
// Grab the variable info that was squirreled away in the MMI side-table.
collectVariableInfoFromMFTable(TheCU, Processed);
continue;
Processed.insert(IV);
- DbgVariable *RegVar = createConcreteVariable(TheCU, *Scope, IV);
+ DbgVariable *RegVar = cast<DbgVariable>(createConcreteEntity(TheCU,
+ *Scope, IV.first, IV.second));
const MachineInstr *MInsn = Ranges.front().first;
assert(MInsn->isDebugValue() && "History must begin with debug value");
Entry.finalize(*Asm, List, BT);
}
- // Collect info for variables that were optimized out.
+ // For each InlinedLabel collected from DBG_LABEL instructions, convert to
+ // DWARF-related DbgLabel.
+ for (const auto &I : DbgLabels) {
+ InlinedLabel IL = I.first;
+ const MachineInstr *MI = I.second;
+ if (MI == nullptr)
+ continue;
+
+ LexicalScope *Scope = nullptr;
+ // Get inlined DILocation if it is inlined label.
+ if (const DILocation *IA = IL.second)
+ Scope = LScopes.findInlinedScope(IL.first->getScope(), IA);
+ else
+ Scope = LScopes.findLexicalScope(IL.first->getScope());
+ // If label scope is not found then skip this label.
+ if (!Scope)
+ continue;
+
+ /// At this point, the temporary label is created.
+ /// Save the temporary label to DbgLabel entity to get the
+ /// actually address when generating Dwarf DIE.
+ MCSymbol *Sym = getLabelBeforeInsn(MI);
+ createConcreteEntity(TheCU, *Scope, IL.first, IL.second, Sym);
+ }
+
+ // Collect info for variables/labels that were optimized out.
for (const DINode *DN : SP->getRetainedNodes()) {
+ LexicalScope *Scope = nullptr;
if (auto *DV = dyn_cast<DILocalVariable>(DN)) {
- if (Processed.insert(InlinedVariable(DV, nullptr)).second)
- if (LexicalScope *Scope = LScopes.findLexicalScope(DV->getScope()))
- createConcreteVariable(TheCU, *Scope, InlinedVariable(DV, nullptr));
+ if (!Processed.insert(InlinedVariable(DV, nullptr)).second)
+ continue;
+ Scope = LScopes.findLexicalScope(DV->getScope());
+ } else if (auto *DL = dyn_cast<DILabel>(DN)) {
+ Scope = LScopes.findLexicalScope(DL->getScope());
}
+
+ if (Scope)
+ createConcreteEntity(TheCU, *Scope, DN, nullptr);
}
}
DwarfCompileUnit &TheCU = *CUMap.lookup(SP->getUnit());
DenseSet<InlinedVariable> ProcessedVars;
- collectVariableInfo(TheCU, SP, ProcessedVars);
+ collectEntityInfo(TheCU, SP, ProcessedVars);
// Add the range of this function to the list of ranges for the CU.
TheCU.addRange(RangeSpan(Asm->getFunctionBegin(), Asm->getFunctionEnd()));
// Collect info for variables that were optimized out.
if (!ProcessedVars.insert(InlinedVariable(DV, nullptr)).second)
continue;
- ensureAbstractVariableIsCreated(TheCU, InlinedVariable(DV, nullptr),
- DV->getScope());
+ ensureAbstractEntityIsCreated(TheCU, DV, DV->getScope());
assert(LScopes.getAbstractScopesList().size() == NumAbstractScopes
- && "ensureAbstractVariableIsCreated inserted abstract scopes");
+ && "ensureAbstractEntityIsCreated inserted abstract scopes");
+ } else if (auto *DL = dyn_cast<DILabel>(DN)) {
+ ensureAbstractEntityIsCreated(TheCU, DL, DL->getScope());
}
}
constructAbstractSubprogramScopeDIE(TheCU, AScope);
// DbgVariables except those that are also in AbstractVariables (since they
// can be used cross-function)
InfoHolder.getScopeVariables().clear();
+ InfoHolder.getScopeLabels().clear();
PrevLabel = nullptr;
CurFn = nullptr;
}
#define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFDEBUG_H
#include "AddressPool.h"
-#include "DbgValueHistoryCalculator.h"
+#include "DbgEntityHistoryCalculator.h"
#include "DebugHandlerBase.h"
#include "DebugLocStream.h"
#include "DwarfFile.h"
class Module;
//===----------------------------------------------------------------------===//
+/// This class is defined as the common parent of DbgVariable and DbgLabel
+/// such that it could levarage polymorphism to extract common code for
+/// DbgVariable and DbgLabel.
+class DbgEntity {
+ const DINode *Entity;
+ const DILocation *InlinedAt;
+ DIE *TheDIE = nullptr;
+ unsigned SubclassID;
+
+public:
+ enum DbgEntityKind {
+ DbgVariableKind,
+ DbgLabelKind
+ };
+
+ DbgEntity(const DINode *N, const DILocation *IA, unsigned ID)
+ : Entity(N), InlinedAt(IA), SubclassID(ID) {}
+
+ /// Accessors.
+ /// @{
+ const DINode *getEntity() const { return Entity; }
+ const DILocation *getInlinedAt() const { return InlinedAt; }
+ DIE *getDIE() const { return TheDIE; }
+ unsigned getDbgEntityID() const { return SubclassID; }
+ /// @}
+
+ void setDIE(DIE &D) { TheDIE = &D; }
+
+ static bool classof(const DbgEntity *N) {
+ switch (N->getDbgEntityID()) {
+ default:
+ return false;
+ case DbgVariableKind:
+ case DbgLabelKind:
+ return true;
+ }
+ }
+};
+
+//===----------------------------------------------------------------------===//
/// This class is used to track local variable information.
///
/// Variables can be created from allocas, in which case they're generated from
/// single instruction use \a MInsn and (optionally) a single entry of \a Expr.
///
/// Variables that have been optimized out use none of these fields.
-class DbgVariable {
- const DILocalVariable *Var; /// Variable Descriptor.
- const DILocation *IA; /// Inlined at location.
- DIE *TheDIE = nullptr; /// Variable DIE.
+class DbgVariable : public DbgEntity {
unsigned DebugLocListIndex = ~0u; /// Offset in DebugLocs.
const MachineInstr *MInsn = nullptr; /// DBG_VALUE instruction.
/// Creates a variable without any DW_AT_location. Call \a initializeMMI()
/// for MMI entries, or \a initializeDbgValue() for DBG_VALUE instructions.
DbgVariable(const DILocalVariable *V, const DILocation *IA)
- : Var(V), IA(IA) {}
+ : DbgEntity(V, IA, DbgVariableKind) {}
/// Initialize from the MMI table.
void initializeMMI(const DIExpression *E, int FI) {
assert(FrameIndexExprs.empty() && "Already initialized?");
assert(!MInsn && "Already initialized?");
- assert(Var == DbgValue->getDebugVariable() && "Wrong variable");
- assert(IA == DbgValue->getDebugLoc()->getInlinedAt() && "Wrong inlined-at");
+ assert(getVariable() == DbgValue->getDebugVariable() && "Wrong variable");
+ assert(getInlinedAt() == DbgValue->getDebugLoc()->getInlinedAt() &&
+ "Wrong inlined-at");
MInsn = DbgValue;
if (auto *E = DbgValue->getDebugExpression())
}
// Accessors.
- const DILocalVariable *getVariable() const { return Var; }
- const DILocation *getInlinedAt() const { return IA; }
+ const DILocalVariable *getVariable() const {
+ return cast<DILocalVariable>(getEntity());
+ }
const DIExpression *getSingleExpression() const {
assert(MInsn && FrameIndexExprs.size() <= 1);
return FrameIndexExprs.size() ? FrameIndexExprs[0].Expr : nullptr;
}
- void setDIE(DIE &D) { TheDIE = &D; }
- DIE *getDIE() const { return TheDIE; }
void setDebugLocListIndex(unsigned O) { DebugLocListIndex = O; }
unsigned getDebugLocListIndex() const { return DebugLocListIndex; }
- StringRef getName() const { return Var->getName(); }
+ StringRef getName() const { return getVariable()->getName(); }
const MachineInstr *getMInsn() const { return MInsn; }
/// Get the FI entries, sorted by fragment offset.
ArrayRef<FrameIndexExpr> getFrameIndexExprs() const;
// Translate tag to proper Dwarf tag.
dwarf::Tag getTag() const {
// FIXME: Why don't we just infer this tag and store it all along?
- if (Var->isParameter())
+ if (getVariable()->isParameter())
return dwarf::DW_TAG_formal_parameter;
return dwarf::DW_TAG_variable;
/// Return true if DbgVariable is artificial.
bool isArtificial() const {
- if (Var->isArtificial())
+ if (getVariable()->isArtificial())
return true;
if (getType()->isArtificial())
return true;
}
bool isObjectPointer() const {
- if (Var->isObjectPointer())
+ if (getVariable()->isObjectPointer())
return true;
if (getType()->isObjectPointer())
return true;
bool isBlockByrefVariable() const;
const DIType *getType() const;
+ static bool classof(const DbgEntity *N) {
+ return N->getDbgEntityID() == DbgVariableKind;
+ }
+
+private:
+ template <typename T> T *resolve(TypedDINodeRef<T> Ref) const {
+ return Ref.resolve();
+ }
+};
+
+//===----------------------------------------------------------------------===//
+/// This class is used to track label information.
+///
+/// Labels are collected from \c DBG_LABEL instructions.
+class DbgLabel : public DbgEntity {
+ const MCSymbol *Sym; /// Symbol before DBG_LABEL instruction.
+
+public:
+ /// We need MCSymbol information to generate DW_AT_low_pc.
+ DbgLabel(const DILabel *L, const DILocation *IA, const MCSymbol *Sym = nullptr)
+ : DbgEntity(L, IA, DbgLabelKind), Sym(Sym) {}
+
+ /// Accessors.
+ /// @{
+ const DILabel *getLabel() const { return cast<DILabel>(getEntity()); }
+ const MCSymbol *getSymbol() const { return Sym; }
+
+ StringRef getName() const { return getLabel()->getName(); }
+ /// @}
+
+ /// Translate tag to proper Dwarf tag.
+ dwarf::Tag getTag() const {
+ return dwarf::DW_TAG_label;
+ }
+
+ static bool classof(const DbgEntity *N) {
+ return N->getDbgEntityID() == DbgLabelKind;
+ }
+
private:
template <typename T> T *resolve(TypedDINodeRef<T> Ref) const {
return Ref.resolve();
/// Size of each symbol emitted (for those symbols that have a specific size).
DenseMap<const MCSymbol *, uint64_t> SymSize;
- /// Collection of abstract variables.
- SmallVector<std::unique_ptr<DbgVariable>, 64> ConcreteVariables;
+ /// Collection of abstract variables/labels.
+ SmallVector<std::unique_ptr<DbgEntity>, 64> ConcreteEntities;
/// Collection of DebugLocEntry. Stored in a linked list so that DIELocLists
/// can refer to them in spite of insertions into this list.
}
using InlinedVariable = DbgValueHistoryMap::InlinedVariable;
+ using InlinedLabel = DbgLabelInstrMap::InlinedLabel;
- void ensureAbstractVariableIsCreated(DwarfCompileUnit &CU, InlinedVariable IV,
- const MDNode *Scope);
- void ensureAbstractVariableIsCreatedIfScoped(DwarfCompileUnit &CU, InlinedVariable IV,
- const MDNode *Scope);
+ void ensureAbstractEntityIsCreated(DwarfCompileUnit &CU,
+ const DINode *Node,
+ const MDNode *Scope);
+ void ensureAbstractEntityIsCreatedIfScoped(DwarfCompileUnit &CU,
+ const DINode *Node,
+ const MDNode *Scope);
- DbgVariable *createConcreteVariable(DwarfCompileUnit &TheCU,
- LexicalScope &Scope, InlinedVariable IV);
+ DbgEntity *createConcreteEntity(DwarfCompileUnit &TheCU,
+ LexicalScope &Scope,
+ const DINode *Node,
+ const DILocation *Location,
+ const MCSymbol *Sym = nullptr);
/// Construct a DIE for this abstract scope.
void constructAbstractSubprogramScopeDIE(DwarfCompileUnit &SrcCU, LexicalScope *Scope);
void addAccelNameImpl(AccelTable<DataT> &AppleAccel, StringRef Name,
const DIE &Die);
- void finishVariableDefinitions();
+ void finishEntityDefinitions();
void finishSubprogramDefinitions();
unsigned Flags);
/// Populate LexicalScope entries with variables' info.
- void collectVariableInfo(DwarfCompileUnit &TheCU, const DISubprogram *SP,
- DenseSet<InlinedVariable> &ProcessedVars);
+ void collectEntityInfo(DwarfCompileUnit &TheCU, const DISubprogram *SP,
+ DenseSet<InlinedVariable> &ProcessedVars);
/// Build the location list for all DBG_VALUEs in the
/// function that describe the same variable.
}
return true;
}
+
+void DwarfFile::addScopeLabel(LexicalScope *LS, DbgLabel *Label) {
+ SmallVectorImpl<DbgLabel *> &Labels = ScopeLabels[LS];
+ Labels.push_back(Label);
+}
namespace llvm {
class AsmPrinter;
+class DbgEntity;
class DbgVariable;
+class DbgLabel;
class DwarfCompileUnit;
class DwarfUnit;
class LexicalScope;
/// Collection of DbgVariables of each lexical scope.
DenseMap<LexicalScope *, ScopeVars> ScopeVariables;
+ /// Collection of DbgLabels of each lexical scope.
+ using LabelList = SmallVector<DbgLabel *, 4>;
+ DenseMap<LexicalScope *, LabelList> ScopeLabels;
+
// Collection of abstract subprogram DIEs.
DenseMap<const MDNode *, DIE *> AbstractSPDies;
- DenseMap<const MDNode *, std::unique_ptr<DbgVariable>> AbstractVariables;
+ DenseMap<const DINode *, std::unique_ptr<DbgEntity>> AbstractEntities;
/// Maps MDNodes for type system with the corresponding DIEs. These DIEs can
/// be shared across CUs, that is why we keep the map here instead
/// \returns false if the variable was merged with a previous one.
bool addScopeVariable(LexicalScope *LS, DbgVariable *Var);
+ void addScopeLabel(LexicalScope *LS, DbgLabel *Label);
+
DenseMap<LexicalScope *, ScopeVars> &getScopeVariables() {
return ScopeVariables;
}
+ DenseMap<LexicalScope *, LabelList> &getScopeLabels() {
+ return ScopeLabels;
+ }
+
DenseMap<const MDNode *, DIE *> &getAbstractSPDies() {
return AbstractSPDies;
}
- DenseMap<const MDNode *, std::unique_ptr<DbgVariable>> &getAbstractVariables() {
- return AbstractVariables;
+ DenseMap<const DINode *, std::unique_ptr<DbgEntity>> &getAbstractEntities() {
+ return AbstractEntities;
}
void insertDIE(const MDNode *TypeMD, DIE *Die) {
addSourceLine(Die, SP->getLine(), SP->getFile());
}
+void DwarfUnit::addSourceLine(DIE &Die, const DILabel *L) {
+ assert(L);
+
+ addSourceLine(Die, L->getLine(), L->getFile());
+}
+
void DwarfUnit::addSourceLine(DIE &Die, const DIType *Ty) {
assert(Ty);
void addSourceLine(DIE &Die, const DILocalVariable *V);
void addSourceLine(DIE &Die, const DIGlobalVariable *G);
void addSourceLine(DIE &Die, const DISubprogram *SP);
+ void addSourceLine(DIE &Die, const DILabel *L);
void addSourceLine(DIE &Die, const DIType *Ty);
void addSourceLine(DIE &Die, const DIObjCProperty *Ty);
--- /dev/null
+; RUN: llc -O2 -filetype=obj -o - %s | llvm-dwarfdump -v - | FileCheck %s
+;
+; CHECK: .debug_info contents:
+; CHECK: [[LABEL_ORIGIN:0x[0-9a-zA-Z]+]]:{{ *}}DW_TAG_label
+; CHECK-NEXT: DW_AT_name [DW_FORM_strp] {{.*}}"top"
+; CHECK-NEXT: DW_AT_decl_file [DW_FORM_data1] {{.*}}debug-label-inline.c
+; CHECK-NEXT: DW_AT_decl_line [DW_FORM_data1] {{.*}}8
+; CHECK: DW_TAG_label
+; CHECK-NEXT: DW_AT_abstract_origin [DW_FORM_ref4] {{.*}}{[[LABEL_ORIGIN]]} "top"
+; CHECK-NEXT: DW_AT_low_pc [DW_FORM_addr] {{.*}}{{0x[0-9a-f]+}}
+
+source_filename = "debug-label-inline.c"
+
+@ga = external local_unnamed_addr global i32, align 4
+@gb = external local_unnamed_addr global i32, align 4
+
+define i32 @f2() local_unnamed_addr #0 !dbg !4 {
+entry:
+ %0 = load i32, i32* @ga, align 4, !dbg !1
+ %1 = load i32, i32* @gb, align 4, !dbg !1
+ call void @llvm.dbg.label(metadata !15), !dbg !17
+ %add.i = add nsw i32 %1, %0, !dbg !18
+ ret i32 %add.i, !dbg !1
+}
+
+declare void @llvm.dbg.label(metadata)
+declare void @llvm.dbg.value(metadata, metadata, metadata)
+
+attributes #0 = { nounwind readonly }
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!3}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !6, isOptimized: true, emissionKind: FullDebug, enums: !2)
+!1 = !DILocation(line: 18, scope: !4)
+!2 = !{}
+!3 = !{i32 2, !"Debug Info Version", i32 3}
+!4 = distinct !DISubprogram(name: "f2", scope: !6, file: !6, line: 15, type: !7, isLocal: false, isDefinition: true, scopeLine: 15, isOptimized: true, unit: !0, retainedNodes: !2)
+!6 = !DIFile(filename: "debug-label-inline.c", directory: "./")
+!7 = !DISubroutineType(types: !8)
+!8 = !{!10}
+!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!11 = distinct !DISubprogram(name: "f1", scope: !6, file: !6, line: 5, type: !12, isLocal: false, isDefinition: true, scopeLine: 5, isOptimized: true, unit: !0, retainedNodes: !14)
+!12 = !DISubroutineType(types: !13)
+!13 = !{!10, !10, !10}
+!14 = !{!15}
+!15 = !DILabel(scope: !11, name: "top", file: !6, line: 8)
+!16 = distinct !DILocation(line: 18, scope: !4)
+!17 = !DILocation(line: 8, scope: !11, inlinedAt: !16)
+!18 = !DILocation(line: 9, scope: !11, inlinedAt: !16)
--- /dev/null
+; RUN: llc -fast-isel=false -O0 -filetype=obj -o - %s | llvm-dwarfdump -v - | FileCheck %s
+;
+; CHECK: .debug_info contents:
+; CHECK: DW_TAG_label
+; CHECK-NEXT: DW_AT_name [DW_FORM_strp] {{.*}}"top"
+; CHECK-NEXT: DW_AT_decl_file [DW_FORM_data1] {{.*}}debug-label.c
+; CHECK-NEXT: DW_AT_decl_line [DW_FORM_data1] {{.*}}4
+; CHECK-NEXT: DW_AT_low_pc [DW_FORM_addr] {{.*}}{{0x[0-9a-f]+}}
+; CHECK: DW_TAG_label
+; CHECK-NEXT: DW_AT_name [DW_FORM_strp] {{.*}}"done"
+; CHECK-NEXT: DW_AT_decl_file [DW_FORM_data1] {{.*}}debug-label.c
+; CHECK-NEXT: DW_AT_decl_line [DW_FORM_data1] {{.*}}7
+; CHECK-NEXT: DW_AT_low_pc [DW_FORM_addr] {{.*}}{{0x[0-9a-f]+}}
+;
+; RUN: llc -fast-isel=false -O0 -o - %s | FileCheck %s -check-prefix=ASM
+;
+; ASM: [[TOP_LOW_PC:[.0-9a-zA-Z]+]]:{{[[:space:]].*}}DEBUG_LABEL: foo:top
+; ASM: [[DONE_LOW_PC:[.0-9a-zA-Z]+]]:{{[[:space:]].*}}DEBUG_LABEL: foo:done
+; ASM-LABEL: .debug_str
+; ASM: [[TOP_LABEL:[.0-9a-zA-Z]+]]:{{[[:space:]].*}}"top"
+; ASM: [[DONE_LABEL:[.0-9a-zA-Z]+]]:{{[[:space:]].*}}"done"
+; ASM-LABEL: .debug_info
+; ASM: DW_TAG_label
+; ASM-NEXT: [[TOP_LABEL]] # DW_AT_name
+; ASM-NEXT: 1 # DW_AT_decl_file
+; ASM-NEXT: 4 # DW_AT_decl_line
+; ASM-NEXT: [[TOP_LOW_PC]] # DW_AT_low_pc
+; ASM: DW_TAG_label
+; ASM-NEXT: [[DONE_LABEL]] # DW_AT_name
+; ASM-NEXT: 1 # DW_AT_decl_file
+; ASM-NEXT: 7 # DW_AT_decl_line
+; ASM-NEXT: [[DONE_LOW_PC]] # DW_AT_low_pc
+
+source_filename = "debug-label.c"
+
+define dso_local i32 @foo(i32 %a, i32 %b) !dbg !6 {
+entry:
+ %a.addr = alloca i32, align 4
+ %b.addr = alloca i32, align 4
+ %sum = alloca i32, align 4
+ store i32 %a, i32* %a.addr, align 4
+ store i32 %b, i32* %b.addr, align 4
+ br label %top
+
+top:
+ call void @llvm.dbg.label(metadata !10), !dbg !11
+ %0 = load i32, i32* %a.addr, align 4
+ %1 = load i32, i32* %b.addr, align 4
+ %add = add nsw i32 %0, %1
+ store i32 %add, i32* %sum, align 4
+ br label %done
+
+done:
+ call void @llvm.dbg.label(metadata !12), !dbg !13
+ %2 = load i32, i32* %sum, align 4
+ ret i32 %2, !dbg !14
+}
+
+declare void @llvm.dbg.label(metadata)
+
+!llvm.dbg.cu = !{!0}
+!llvm.module.flags = !{!4}
+
+!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: false, emissionKind: FullDebug, enums: !2)
+!1 = !DIFile(filename: "debug-label.c", directory: "./")
+!2 = !{}
+!4 = !{i32 2, !"Debug Info Version", i32 3}
+!6 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !7, isLocal: false, isDefinition: true, scopeLine: 2, isOptimized: false, unit: !0, retainedNodes: !2)
+!7 = !DISubroutineType(types: !8)
+!8 = !{!9, !9, !9}
+!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
+!10 = !DILabel(scope: !6, name: "top", file: !1, line: 4)
+!11 = !DILocation(line: 4, column: 1, scope: !6)
+!12 = !DILabel(scope: !6, name: "done", file: !1, line: 7)
+!13 = !DILocation(line: 7, column: 1, scope: !6)
+!14 = !DILocation(line: 8, column: 3, scope: !6)
projects / platform / upstream / llvm.git / commitdiff