#include "llvm/IR/Instruction.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCStreamer.h"
+#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetSubtargetInfo.h"
DIScope GVContext = GV.getContext();
DIType GTy = DD->resolve(GV.getType());
- // If this is a static data member definition, some attributes belong
- // to the declaration DIE.
- DIE *VariableDIE = nullptr;
- bool IsStaticMember = false;
- DIDerivedType SDMDecl = GV.getStaticDataMemberDeclaration();
- if (SDMDecl.Verify()) {
- assert(SDMDecl.isStaticMember() && "Expected static member decl");
- // We need the declaration DIE that is in the static member's class.
- VariableDIE = getOrCreateStaticMemberDIE(SDMDecl);
- IsStaticMember = true;
- }
-
- // If this is not a static data member definition, create the variable
- // DIE and add the initial set of attributes to it.
- if (!VariableDIE) {
- // Construct the context before querying for the existence of the DIE in
- // case such construction creates the DIE.
- DIE *ContextDIE = getOrCreateContextDIE(GVContext);
+ // Construct the context before querying for the existence of the DIE in
+ // case such construction creates the DIE.
+ DIE *ContextDIE = getOrCreateContextDIE(GVContext);
- // Add to map.
- VariableDIE = &createAndAddDIE(GV.getTag(), *ContextDIE, GV);
+ // Add to map.
+ DIE *VariableDIE = &createAndAddDIE(GV.getTag(), *ContextDIE, GV);
+ DIScope DeclContext;
+ if (DIDerivedType SDMDecl = GV.getStaticDataMemberDeclaration()) {
+ DeclContext = resolve(SDMDecl.getContext());
+ assert(SDMDecl.isStaticMember() && "Expected static member decl");
+ assert(GV.isDefinition());
+ // We need the declaration DIE that is in the static member's class.
+ DIE *VariableSpecDIE = getOrCreateStaticMemberDIE(SDMDecl);
+ addDIEEntry(*VariableDIE, dwarf::DW_AT_specification, *VariableSpecDIE);
+ } else {
+ DeclContext = GV.getContext();
// Add name and type.
addString(*VariableDIE, dwarf::DW_AT_name, GV.getDisplayName());
addType(*VariableDIE, GTy);
addSourceLine(*VariableDIE, GV);
}
+ if (!GV.isDefinition())
+ addFlag(*VariableDIE, dwarf::DW_AT_declaration);
+
// Add location.
bool addToAccelTable = false;
- DIE *VariableSpecDIE = nullptr;
bool isGlobalVariable = GV.getGlobal() != nullptr;
if (isGlobalVariable) {
addToAccelTable = true;
DD->addArangeLabel(SymbolCU(this, Sym));
addOpAddress(*Loc, Sym);
}
- // A static member's declaration is already flagged as such.
- if (!SDMDecl.Verify() && !GV.isDefinition())
- addFlag(*VariableDIE, dwarf::DW_AT_declaration);
- // Do not create specification DIE if context is either compile unit
- // or a subprogram.
- if (GVContext && GV.isDefinition() && !GVContext.isCompileUnit() &&
- !GVContext.isFile() && !DD->isSubprogramContext(GVContext)) {
- // Create specification DIE.
- VariableSpecDIE = &createAndAddDIE(dwarf::DW_TAG_variable, UnitDie);
- addDIEEntry(*VariableSpecDIE, dwarf::DW_AT_specification, *VariableDIE);
- addBlock(*VariableSpecDIE, dwarf::DW_AT_location, Loc);
- // A static member's declaration is already flagged as such.
- if (!SDMDecl.Verify())
- addFlag(*VariableDIE, dwarf::DW_AT_declaration);
- } else {
- addBlock(*VariableDIE, dwarf::DW_AT_location, Loc);
- }
+
+ addBlock(*VariableDIE, dwarf::DW_AT_location, Loc);
// Add the linkage name.
StringRef LinkageName = GV.getLinkageName();
if (!LinkageName.empty())
// From DWARF4: DIEs to which DW_AT_linkage_name may apply include:
// TAG_common_block, TAG_constant, TAG_entry_point, TAG_subprogram and
// TAG_variable.
- addString(IsStaticMember && VariableSpecDIE ? *VariableSpecDIE
- : *VariableDIE,
+ addString(*VariableDIE,
DD->getDwarfVersion() >= 4 ? dwarf::DW_AT_linkage_name
: dwarf::DW_AT_MIPS_linkage_name,
GlobalValue::getRealLinkageName(LinkageName));
} else if (const ConstantInt *CI =
dyn_cast_or_null<ConstantInt>(GV.getConstant())) {
- // AT_const_value was added when the static member was created. To avoid
- // emitting AT_const_value multiple times, we only add AT_const_value when
- // it is not a static member.
- if (!IsStaticMember)
- addConstantValue(*VariableDIE, CI, GTy);
+ addConstantValue(*VariableDIE, CI, GTy);
} else if (const ConstantExpr *CE = getMergedGlobalExpr(GV.getConstant())) {
addToAccelTable = true;
// GV is a merged global.
addBlock(*VariableDIE, dwarf::DW_AT_location, Loc);
}
- DIE *ResultDIE = VariableSpecDIE ? VariableSpecDIE : VariableDIE;
-
if (addToAccelTable) {
- DD->addAccelName(GV.getName(), *ResultDIE);
+ DD->addAccelName(GV.getName(), *VariableDIE);
// If the linkage name is different than the name, go ahead and output
// that as well into the name table.
if (GV.getLinkageName() != "" && GV.getName() != GV.getLinkageName())
- DD->addAccelName(GV.getLinkageName(), *ResultDIE);
+ DD->addAccelName(GV.getLinkageName(), *VariableDIE);
}
- addGlobalName(GV.getName(), *ResultDIE, GV.getContext());
- return ResultDIE;
+ addGlobalName(GV.getName(), *VariableDIE, DeclContext);
+ return VariableDIE;
}
void DwarfCompileUnit::addRange(RangeSpan Range) {
if (!ScopeDIE)
return;
// We create children when the scope DIE is not null.
- DD->createScopeChildrenDIE(*this, Scope, Children);
+ createScopeChildrenDIE(Scope, Children);
} else {
// Early exit when we know the scope DIE is going to be null.
if (DD->isLexicalScopeDIENull(Scope))
// We create children here when we know the scope DIE is not going to be
// null and the children will be added to the scope DIE.
- DD->createScopeChildrenDIE(*this, Scope, Children, &ChildScopeCount);
+ createScopeChildrenDIE(Scope, Children, &ChildScopeCount);
// There is no need to emit empty lexical block DIE.
for (const auto &E : DD->findImportedEntitiesForScope(DS))
return ScopeDIE;
}
+/// constructVariableDIE - Construct a DIE for the given DbgVariable.
+std::unique_ptr<DIE> DwarfCompileUnit::constructVariableDIE(DbgVariable &DV,
+ bool Abstract) {
+ auto D = constructVariableDIEImpl(DV, Abstract);
+ DV.setDIE(*D);
+ return D;
+}
+
+std::unique_ptr<DIE>
+DwarfCompileUnit::constructVariableDIEImpl(const DbgVariable &DV,
+ bool Abstract) {
+ // Define variable debug information entry.
+ auto VariableDie = make_unique<DIE>(DV.getTag());
+
+ if (Abstract) {
+ applyVariableAttributes(DV, *VariableDie);
+ return VariableDie;
+ }
+
+ // Add variable address.
+
+ unsigned Offset = DV.getDotDebugLocOffset();
+ if (Offset != ~0U) {
+ addLocationList(*VariableDie, dwarf::DW_AT_location, Offset);
+ return VariableDie;
+ }
+
+ // Check if variable is described by a DBG_VALUE instruction.
+ if (const MachineInstr *DVInsn = DV.getMInsn()) {
+ assert(DVInsn->getNumOperands() == 4);
+ if (DVInsn->getOperand(0).isReg()) {
+ const MachineOperand RegOp = DVInsn->getOperand(0);
+ // If the second operand is an immediate, this is an indirect value.
+ if (DVInsn->getOperand(1).isImm()) {
+ MachineLocation Location(RegOp.getReg(),
+ DVInsn->getOperand(1).getImm());
+ addVariableAddress(DV, *VariableDie, Location);
+ } else if (RegOp.getReg())
+ addVariableAddress(DV, *VariableDie, MachineLocation(RegOp.getReg()));
+ } else if (DVInsn->getOperand(0).isImm())
+ addConstantValue(*VariableDie, DVInsn->getOperand(0), DV.getType());
+ else if (DVInsn->getOperand(0).isFPImm())
+ addConstantFPValue(*VariableDie, DVInsn->getOperand(0));
+ else if (DVInsn->getOperand(0).isCImm())
+ addConstantValue(*VariableDie, DVInsn->getOperand(0).getCImm(),
+ DV.getType());
+
+ return VariableDie;
+ }
+
+ // .. else use frame index.
+ int FI = DV.getFrameIndex();
+ if (FI != ~0) {
+ unsigned FrameReg = 0;
+ const TargetFrameLowering *TFI =
+ Asm->TM.getSubtargetImpl()->getFrameLowering();
+ int Offset = TFI->getFrameIndexReference(*Asm->MF, FI, FrameReg);
+ MachineLocation Location(FrameReg, Offset);
+ addVariableAddress(DV, *VariableDie, Location);
+ }
+
+ return VariableDie;
+}
+
+std::unique_ptr<DIE> DwarfCompileUnit::constructVariableDIE(
+ DbgVariable &DV, const LexicalScope &Scope, DIE *&ObjectPointer) {
+ auto Var = constructVariableDIE(DV, Scope.isAbstractScope());
+ if (DV.isObjectPointer())
+ ObjectPointer = Var.get();
+ return Var;
+}
+
+DIE *DwarfCompileUnit::createScopeChildrenDIE(
+ LexicalScope *Scope, SmallVectorImpl<std::unique_ptr<DIE>> &Children,
+ unsigned *ChildScopeCount) {
+ DIE *ObjectPointer = nullptr;
+
+ for (DbgVariable *DV : DU->getScopeVariables().lookup(Scope))
+ Children.push_back(constructVariableDIE(*DV, *Scope, ObjectPointer));
+
+ unsigned ChildCountWithoutScopes = Children.size();
+
+ for (LexicalScope *LS : Scope->getChildren())
+ constructScopeDIE(LS, Children);
+
+ if (ChildScopeCount)
+ *ChildScopeCount = Children.size() - ChildCountWithoutScopes;
+
+ return ObjectPointer;
+}
+
+void DwarfCompileUnit::constructSubprogramScopeDIE(LexicalScope *Scope) {
+ assert(Scope && Scope->getScopeNode());
+ assert(!Scope->getInlinedAt());
+ assert(!Scope->isAbstractScope());
+ DISubprogram Sub(Scope->getScopeNode());
+
+ assert(Sub.isSubprogram());
+
+ DD->getProcessedSPNodes().insert(Sub);
+
+ DIE &ScopeDIE = updateSubprogramScopeDIE(Sub);
+
+ // If this is a variadic function, add an unspecified parameter.
+ DITypeArray FnArgs = Sub.getType().getTypeArray();
+
+ // Collect lexical scope children first.
+ // ObjectPointer might be a local (non-argument) local variable if it's a
+ // block's synthetic this pointer.
+ if (DIE *ObjectPointer = createAndAddScopeChildren(Scope, ScopeDIE))
+ addDIEEntry(ScopeDIE, dwarf::DW_AT_object_pointer, *ObjectPointer);
+
+ // If we have a single element of null, it is a function that returns void.
+ // If we have more than one elements and the last one is null, it is a
+ // variadic function.
+ if (FnArgs.getNumElements() > 1 &&
+ !FnArgs.getElement(FnArgs.getNumElements() - 1))
+ ScopeDIE.addChild(make_unique<DIE>(dwarf::DW_TAG_unspecified_parameters));
+}
+
+DIE *DwarfCompileUnit::createAndAddScopeChildren(LexicalScope *Scope,
+ DIE &ScopeDIE) {
+ // We create children when the scope DIE is not null.
+ SmallVector<std::unique_ptr<DIE>, 8> Children;
+ DIE *ObjectPointer = createScopeChildrenDIE(Scope, Children);
+
+ // Add children
+ for (auto &I : Children)
+ ScopeDIE.addChild(std::move(I));
+
+ return ObjectPointer;
+}
+
+DIE &
+DwarfCompileUnit::constructAbstractSubprogramScopeDIE(LexicalScope *Scope) {
+ DISubprogram SP(Scope->getScopeNode());
+
+ DIE *ContextDIE;
+
+ // Some of this is duplicated from DwarfUnit::getOrCreateSubprogramDIE, with
+ // the important distinction that the DIDescriptor is not associated with the
+ // DIE (since the DIDescriptor will be associated with the concrete DIE, if
+ // any). It could be refactored to some common utility function.
+ if (DISubprogram SPDecl = SP.getFunctionDeclaration()) {
+ ContextDIE = &getUnitDie();
+ getOrCreateSubprogramDIE(SPDecl);
+ } else
+ ContextDIE = getOrCreateContextDIE(resolve(SP.getContext()));
+
+ // Passing null as the associated DIDescriptor because the abstract definition
+ // shouldn't be found by lookup.
+ DIE &AbsDef =
+ createAndAddDIE(dwarf::DW_TAG_subprogram, *ContextDIE, DIDescriptor());
+ applySubprogramAttributesToDefinition(SP, AbsDef);
+
+ if (getCUNode().getEmissionKind() != DIBuilder::LineTablesOnly)
+ addUInt(AbsDef, dwarf::DW_AT_inline, None, dwarf::DW_INL_inlined);
+ if (DIE *ObjectPointer = createAndAddScopeChildren(Scope, AbsDef))
+ addDIEEntry(AbsDef, dwarf::DW_AT_object_pointer, *ObjectPointer);
+ return AbsDef;
+}
+
+std::unique_ptr<DIE>
+DwarfCompileUnit::constructImportedEntityDIE(const DIImportedEntity &Module) {
+ assert(Module.Verify() &&
+ "Use one of the MDNode * overloads to handle invalid metadata");
+ std::unique_ptr<DIE> IMDie = make_unique<DIE>((dwarf::Tag)Module.getTag());
+ insertDIE(Module, IMDie.get());
+ DIE *EntityDie;
+ DIDescriptor Entity = resolve(Module.getEntity());
+ if (Entity.isNameSpace())
+ EntityDie = getOrCreateNameSpace(DINameSpace(Entity));
+ else if (Entity.isSubprogram())
+ EntityDie = getOrCreateSubprogramDIE(DISubprogram(Entity));
+ else if (Entity.isType())
+ EntityDie = getOrCreateTypeDIE(DIType(Entity));
+ else
+ EntityDie = getDIE(Entity);
+ assert(EntityDie);
+ addSourceLine(*IMDie, Module.getLineNumber(),
+ Module.getContext().getFilename(),
+ Module.getContext().getDirectory());
+ addDIEEntry(*IMDie, dwarf::DW_AT_import, *EntityDie);
+ StringRef Name = Module.getName();
+ if (!Name.empty())
+ addString(*IMDie, dwarf::DW_AT_name, Name);
+
+ return IMDie;
+}
+
+void DwarfCompileUnit::finishSubprogramDefinition(DISubprogram SP) {
+ DIE *D = getDIE(SP);
+ if (DIE *AbsSPDIE = DD->getAbstractSPDies().lookup(SP)) {
+ if (D)
+ // If this subprogram has an abstract definition, reference that
+ addDIEEntry(*D, dwarf::DW_AT_abstract_origin, *AbsSPDIE);
+ } else {
+ if (!D && getCUNode().getEmissionKind() != DIBuilder::LineTablesOnly)
+ // Lazily construct the subprogram if we didn't see either concrete or
+ // inlined versions during codegen. (except in -gmlt ^ where we want
+ // to omit these entirely)
+ D = getOrCreateSubprogramDIE(SP);
+ if (D)
+ // And attach the attributes
+ applySubprogramAttributesToDefinition(SP, *D);
+ }
+}
+
} // end llvm namespace
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