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llvm-project/llvm/lib/CodeGen/MachineDebugInfo.cpp

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//===-- llvm/CodeGen/MachineDebugInfo.cpp -----------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by James M. Laskey and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/MachineDebugInfo.h"
#include "llvm/Constants.h"
#include "llvm/CodeGen/MachineLocation.h"
#include "llvm/DerivedTypes.h"
#include "llvm/GlobalVariable.h"
#include "llvm/Intrinsics.h"
#include "llvm/Instructions.h"
#include "llvm/Module.h"
#include "llvm/Support/Dwarf.h"
#include <iostream>
using namespace llvm;
using namespace llvm::dwarf;
// Handle the Pass registration stuff necessary to use TargetData's.
namespace {
RegisterPass<MachineDebugInfo> X("machinedebuginfo", "Debug Information");
}
//===----------------------------------------------------------------------===//
/// getGlobalVariablesUsing - Return all of the GlobalVariables which have the
/// specified value in their initializer somewhere.
static void
getGlobalVariablesUsing(Value *V, std::vector<GlobalVariable*> &Result) {
// Scan though value users.
for (Value::use_iterator I = V->use_begin(), E = V->use_end(); I != E; ++I) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(*I)) {
// If the user is a GlobalVariable then add to result.
Result.push_back(GV);
} else if (Constant *C = dyn_cast<Constant>(*I)) {
// If the user is a constant variable then scan its users
getGlobalVariablesUsing(C, Result);
}
}
}
/// getGlobalVariablesUsing - Return all of the GlobalVariables that use the
/// named GlobalVariable.
static std::vector<GlobalVariable*>
getGlobalVariablesUsing(Module &M, const std::string &RootName) {
std::vector<GlobalVariable*> Result; // GlobalVariables matching criteria.
std::vector<const Type*> FieldTypes;
FieldTypes.push_back(Type::UIntTy);
FieldTypes.push_back(Type::UIntTy);
// Get the GlobalVariable root.
GlobalVariable *UseRoot = M.getGlobalVariable(RootName,
StructType::get(FieldTypes));
// If present and linkonce then scan for users.
if (UseRoot && UseRoot->hasLinkOnceLinkage()) {
getGlobalVariablesUsing(UseRoot, Result);
}
return Result;
}
/// isStringValue - Return true if the given value can be coerced to a string.
///
static bool isStringValue(Value *V) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
if (GV->hasInitializer() && isa<ConstantArray>(GV->getInitializer())) {
ConstantArray *Init = cast<ConstantArray>(GV->getInitializer());
return Init->isString();
}
} else if (Constant *C = dyn_cast<Constant>(V)) {
if (GlobalValue *GV = dyn_cast<GlobalValue>(C))
return isStringValue(GV);
else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
if (CE->getOpcode() == Instruction::GetElementPtr) {
if (CE->getNumOperands() == 3 &&
cast<Constant>(CE->getOperand(1))->isNullValue() &&
isa<ConstantInt>(CE->getOperand(2))) {
return isStringValue(CE->getOperand(0));
}
}
}
}
return false;
}
/// getGlobalVariable - Return either a direct or cast Global value.
///
static GlobalVariable *getGlobalVariable(Value *V) {
if (GlobalVariable *GV = dyn_cast<GlobalVariable>(V)) {
return GV;
} else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
if (CE->getOpcode() == Instruction::Cast) {
return dyn_cast<GlobalVariable>(CE->getOperand(0));
}
}
return NULL;
}
/// isGlobalVariable - Return true if the given value can be coerced to a
/// GlobalVariable.
static bool isGlobalVariable(Value *V) {
if (isa<GlobalVariable>(V) || isa<ConstantPointerNull>(V)) {
return true;
} else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(V)) {
if (CE->getOpcode() == Instruction::Cast) {
return isa<GlobalVariable>(CE->getOperand(0));
}
}
return false;
}
/// getUIntOperand - Return ith operand if it is an unsigned integer.
///
static ConstantUInt *getUIntOperand(GlobalVariable *GV, unsigned i) {
// Make sure the GlobalVariable has an initializer.
if (!GV->hasInitializer()) return NULL;
// Get the initializer constant.
ConstantStruct *CI = dyn_cast<ConstantStruct>(GV->getInitializer());
if (!CI) return NULL;
// Check if there is at least i + 1 operands.
unsigned N = CI->getNumOperands();
if (i >= N) return NULL;
// Check constant.
return dyn_cast<ConstantUInt>(CI->getOperand(i));
}
//===----------------------------------------------------------------------===//
/// ApplyToFields - Target the visitor to each field of the debug information
/// descriptor.
void DIVisitor::ApplyToFields(DebugInfoDesc *DD) {
DD->ApplyToFields(this);
}
//===----------------------------------------------------------------------===//
/// DICountVisitor - This DIVisitor counts all the fields in the supplied debug
/// the supplied DebugInfoDesc.
class DICountVisitor : public DIVisitor {
private:
unsigned Count; // Running count of fields.
public:
DICountVisitor() : DIVisitor(), Count(0) {}
// Accessors.
unsigned getCount() const { return Count; }
/// Apply - Count each of the fields.
///
virtual void Apply(int &Field) { ++Count; }
virtual void Apply(unsigned &Field) { ++Count; }
virtual void Apply(int64_t &Field) { ++Count; }
virtual void Apply(uint64_t &Field) { ++Count; }
virtual void Apply(bool &Field) { ++Count; }
virtual void Apply(std::string &Field) { ++Count; }
virtual void Apply(DebugInfoDesc *&Field) { ++Count; }
virtual void Apply(GlobalVariable *&Field) { ++Count; }
virtual void Apply(std::vector<DebugInfoDesc *> &Field) {
++Count;
}
};
//===----------------------------------------------------------------------===//
/// DIDeserializeVisitor - This DIVisitor deserializes all the fields in the
/// supplied DebugInfoDesc.
class DIDeserializeVisitor : public DIVisitor {
private:
DIDeserializer &DR; // Active deserializer.
unsigned I; // Current operand index.
ConstantStruct *CI; // GlobalVariable constant initializer.
public:
DIDeserializeVisitor(DIDeserializer &D, GlobalVariable *GV)
: DIVisitor()
, DR(D)
, I(0)
, CI(cast<ConstantStruct>(GV->getInitializer()))
{}
/// Apply - Set the value of each of the fields.
///
virtual void Apply(int &Field) {
Constant *C = CI->getOperand(I++);
Field = cast<ConstantSInt>(C)->getValue();
}
virtual void Apply(unsigned &Field) {
Constant *C = CI->getOperand(I++);
Field = cast<ConstantUInt>(C)->getValue();
}
virtual void Apply(int64_t &Field) {
Constant *C = CI->getOperand(I++);
Field = cast<ConstantSInt>(C)->getValue();
}
virtual void Apply(uint64_t &Field) {
Constant *C = CI->getOperand(I++);
Field = cast<ConstantUInt>(C)->getValue();
}
virtual void Apply(bool &Field) {
Constant *C = CI->getOperand(I++);
Field = cast<ConstantBool>(C)->getValue();
}
virtual void Apply(std::string &Field) {
Constant *C = CI->getOperand(I++);
Field = C->getStringValue();
}
virtual void Apply(DebugInfoDesc *&Field) {
Constant *C = CI->getOperand(I++);
Field = DR.Deserialize(C);
}
virtual void Apply(GlobalVariable *&Field) {
Constant *C = CI->getOperand(I++);
Field = getGlobalVariable(C);
}
virtual void Apply(std::vector<DebugInfoDesc *> &Field) {
Constant *C = CI->getOperand(I++);
GlobalVariable *GV = getGlobalVariable(C);
Field.resize(0);
// Have to be able to deal with the empty array case (zero initializer)
if (!GV->hasInitializer()) return;
if (ConstantArray *CA = dyn_cast<ConstantArray>(GV->getInitializer())) {
for (unsigned i = 0, N = CA->getNumOperands(); i < N; ++i) {
GlobalVariable *GVE = getGlobalVariable(CA->getOperand(i));
DebugInfoDesc *DE = DR.Deserialize(GVE);
Field.push_back(DE);
}
}
}
};
//===----------------------------------------------------------------------===//
/// DISerializeVisitor - This DIVisitor serializes all the fields in
/// the supplied DebugInfoDesc.
class DISerializeVisitor : public DIVisitor {
private:
DISerializer &SR; // Active serializer.
std::vector<Constant*> &Elements; // Element accumulator.
public:
DISerializeVisitor(DISerializer &S, std::vector<Constant*> &E)
: DIVisitor()
, SR(S)
, Elements(E)
{}
/// Apply - Set the value of each of the fields.
///
virtual void Apply(int &Field) {
Elements.push_back(ConstantSInt::get(Type::IntTy, Field));
}
virtual void Apply(unsigned &Field) {
Elements.push_back(ConstantUInt::get(Type::UIntTy, Field));
}
virtual void Apply(int64_t &Field) {
Elements.push_back(ConstantSInt::get(Type::LongTy, Field));
}
virtual void Apply(uint64_t &Field) {
Elements.push_back(ConstantUInt::get(Type::ULongTy, Field));
}
virtual void Apply(bool &Field) {
Elements.push_back(ConstantBool::get(Field));
}
virtual void Apply(std::string &Field) {
Elements.push_back(SR.getString(Field));
}
virtual void Apply(DebugInfoDesc *&Field) {
GlobalVariable *GV = NULL;
// If non-NULL then convert to global.
if (Field) GV = SR.Serialize(Field);
// FIXME - At some point should use specific type.
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
if (GV) {
// Set to pointer to global.
Elements.push_back(ConstantExpr::getCast(GV, EmptyTy));
} else {
// Use NULL.
Elements.push_back(ConstantPointerNull::get(EmptyTy));
}
}
virtual void Apply(GlobalVariable *&Field) {
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
if (Field) {
Elements.push_back(ConstantExpr::getCast(Field, EmptyTy));
} else {
Elements.push_back(ConstantPointerNull::get(EmptyTy));
}
}
virtual void Apply(std::vector<DebugInfoDesc *> &Field) {
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
unsigned N = Field.size();
ArrayType *AT = ArrayType::get(EmptyTy, N);
std::vector<Constant *> ArrayElements;
for (unsigned i = 0, N = Field.size(); i < N; ++i) {
GlobalVariable *GVE = SR.Serialize(Field[i]);
Constant *CE = ConstantExpr::getCast(GVE, EmptyTy);
ArrayElements.push_back(cast<Constant>(CE));
}
Constant *CA = ConstantArray::get(AT, ArrayElements);
GlobalVariable *CAGV = new GlobalVariable(AT, true,
GlobalValue::InternalLinkage,
CA, "llvm.dbg.array",
SR.getModule());
CAGV->setSection("llvm.metadata");
Constant *CAE = ConstantExpr::getCast(CAGV, EmptyTy);
Elements.push_back(CAE);
}
};
//===----------------------------------------------------------------------===//
/// DIGetTypesVisitor - This DIVisitor gathers all the field types in
/// the supplied DebugInfoDesc.
class DIGetTypesVisitor : public DIVisitor {
private:
DISerializer &SR; // Active serializer.
std::vector<const Type*> &Fields; // Type accumulator.
public:
DIGetTypesVisitor(DISerializer &S, std::vector<const Type*> &F)
: DIVisitor()
, SR(S)
, Fields(F)
{}
/// Apply - Set the value of each of the fields.
///
virtual void Apply(int &Field) {
Fields.push_back(Type::IntTy);
}
virtual void Apply(unsigned &Field) {
Fields.push_back(Type::UIntTy);
}
virtual void Apply(int64_t &Field) {
Fields.push_back(Type::LongTy);
}
virtual void Apply(uint64_t &Field) {
Fields.push_back(Type::ULongTy);
}
virtual void Apply(bool &Field) {
Fields.push_back(Type::BoolTy);
}
virtual void Apply(std::string &Field) {
Fields.push_back(SR.getStrPtrType());
}
virtual void Apply(DebugInfoDesc *&Field) {
// FIXME - At some point should use specific type.
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
Fields.push_back(EmptyTy);
}
virtual void Apply(GlobalVariable *&Field) {
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
Fields.push_back(EmptyTy);
}
virtual void Apply(std::vector<DebugInfoDesc *> &Field) {
const PointerType *EmptyTy = SR.getEmptyStructPtrType();
Fields.push_back(EmptyTy);
}
};
//===----------------------------------------------------------------------===//
/// DIVerifyVisitor - This DIVisitor verifies all the field types against
/// a constant initializer.
class DIVerifyVisitor : public DIVisitor {
private:
DIVerifier &VR; // Active verifier.
bool IsValid; // Validity status.
unsigned I; // Current operand index.
ConstantStruct *CI; // GlobalVariable constant initializer.
public:
DIVerifyVisitor(DIVerifier &V, GlobalVariable *GV)
: DIVisitor()
, VR(V)
, IsValid(true)
, I(0)
, CI(cast<ConstantStruct>(GV->getInitializer()))
{
}
// Accessors.
bool isValid() const { return IsValid; }
/// Apply - Set the value of each of the fields.
///
virtual void Apply(int &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isa<ConstantInt>(C);
}
virtual void Apply(unsigned &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isa<ConstantInt>(C);
}
virtual void Apply(int64_t &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isa<ConstantInt>(C);
}
virtual void Apply(uint64_t &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isa<ConstantInt>(C);
}
virtual void Apply(bool &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isa<ConstantBool>(C);
}
virtual void Apply(std::string &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && (!C || isStringValue(C));
}
virtual void Apply(DebugInfoDesc *&Field) {
// FIXME - Prepare the correct descriptor.
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isGlobalVariable(C);
}
virtual void Apply(GlobalVariable *&Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isGlobalVariable(C);
}
virtual void Apply(std::vector<DebugInfoDesc *> &Field) {
Constant *C = CI->getOperand(I++);
IsValid = IsValid && isGlobalVariable(C);
if (!IsValid) return;
GlobalVariable *GV = getGlobalVariable(C);
IsValid = IsValid && GV && GV->hasInitializer();
if (!IsValid) return;
ConstantArray *CA = dyn_cast<ConstantArray>(GV->getInitializer());
IsValid = IsValid && CA;
if (!IsValid) return;
for (unsigned i = 0, N = CA->getNumOperands(); IsValid && i < N; ++i) {
IsValid = IsValid && isGlobalVariable(CA->getOperand(i));
if (!IsValid) return;
GlobalVariable *GVE = getGlobalVariable(CA->getOperand(i));
VR.Verify(GVE);
}
}
};
//===----------------------------------------------------------------------===//
/// TagFromGlobal - Returns the tag number from a debug info descriptor
/// GlobalVariable. Return DIIValid if operand is not an unsigned int.
unsigned DebugInfoDesc::TagFromGlobal(GlobalVariable *GV) {
ConstantUInt *C = getUIntOperand(GV, 0);
return C ? ((unsigned)C->getValue() & ~LLVMDebugVersionMask) :
(unsigned)DW_TAG_invalid;
}
/// VersionFromGlobal - Returns the version number from a debug info
/// descriptor GlobalVariable. Return DIIValid if operand is not an unsigned
/// int.
unsigned DebugInfoDesc::VersionFromGlobal(GlobalVariable *GV) {
ConstantUInt *C = getUIntOperand(GV, 0);
return C ? ((unsigned)C->getValue() & LLVMDebugVersionMask) :
(unsigned)DW_TAG_invalid;
}
/// DescFactory - Create an instance of debug info descriptor based on Tag.
/// Return NULL if not a recognized Tag.
DebugInfoDesc *DebugInfoDesc::DescFactory(unsigned Tag) {
switch (Tag) {
case DW_TAG_anchor: return new AnchorDesc();
case DW_TAG_compile_unit: return new CompileUnitDesc();
case DW_TAG_variable: return new GlobalVariableDesc();
case DW_TAG_subprogram: return new SubprogramDesc();
case DW_TAG_lexical_block: return new BlockDesc();
case DW_TAG_base_type: return new BasicTypeDesc();
case DW_TAG_typedef:
case DW_TAG_pointer_type:
case DW_TAG_reference_type:
case DW_TAG_const_type:
case DW_TAG_volatile_type:
case DW_TAG_restrict_type:
case DW_TAG_member: return new DerivedTypeDesc(Tag);
case DW_TAG_array_type:
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_enumeration_type:
case DW_TAG_vector_type:
case DW_TAG_subroutine_type: return new CompositeTypeDesc(Tag);
case DW_TAG_subrange_type: return new SubrangeDesc();
case DW_TAG_enumerator: return new EnumeratorDesc();
case DW_TAG_return_variable:
case DW_TAG_arg_variable:
case DW_TAG_auto_variable: return new VariableDesc(Tag);
default: break;
}
return NULL;
}
/// getLinkage - get linkage appropriate for this type of descriptor.
///
GlobalValue::LinkageTypes DebugInfoDesc::getLinkage() const {
return GlobalValue::InternalLinkage;
}
/// ApplyToFields - Target the vistor to the fields of the descriptor.
///
void DebugInfoDesc::ApplyToFields(DIVisitor *Visitor) {
Visitor->Apply(Tag);
}
//===----------------------------------------------------------------------===//
AnchorDesc::AnchorDesc()
: DebugInfoDesc(DW_TAG_anchor)
, AnchorTag(0)
{}
AnchorDesc::AnchorDesc(AnchoredDesc *D)
: DebugInfoDesc(DW_TAG_anchor)
, AnchorTag(D->getTag())
{}
// Implement isa/cast/dyncast.
bool AnchorDesc::classof(const DebugInfoDesc *D) {
return D->getTag() == DW_TAG_anchor;
}
/// getLinkage - get linkage appropriate for this type of descriptor.
///
GlobalValue::LinkageTypes AnchorDesc::getLinkage() const {
return GlobalValue::LinkOnceLinkage;
}
/// ApplyToFields - Target the visitor to the fields of the TransUnitDesc.
///
void AnchorDesc::ApplyToFields(DIVisitor *Visitor) {
DebugInfoDesc::ApplyToFields(Visitor);
Visitor->Apply(AnchorTag);
}
/// getDescString - Return a string used to compose global names and labels. A
/// A global variable name needs to be defined for each debug descriptor that is
/// anchored. NOTE: that each global variable named here also needs to be added
/// to the list of names left external in the internalizer.
/// ExternalNames.insert("llvm.dbg.compile_units");
/// ExternalNames.insert("llvm.dbg.global_variables");
/// ExternalNames.insert("llvm.dbg.subprograms");
const char *AnchorDesc::getDescString() const {
switch (AnchorTag) {
case DW_TAG_compile_unit: return CompileUnitDesc::AnchorString;
case DW_TAG_variable: return GlobalVariableDesc::AnchorString;
case DW_TAG_subprogram: return SubprogramDesc::AnchorString;
default: break;
}
assert(0 && "Tag does not have a case for anchor string");
return "";
}
/// getTypeString - Return a string used to label this descriptors type.
///
const char *AnchorDesc::getTypeString() const {
return "llvm.dbg.anchor.type";
}
#ifndef NDEBUG
void AnchorDesc::dump() {
std::cerr << getDescString() << " "
<< "Version(" << getVersion() << "), "
<< "Tag(" << getTag() << "), "
<< "AnchorTag(" << AnchorTag << ")\n";
}
#endif
//===----------------------------------------------------------------------===//
AnchoredDesc::AnchoredDesc(unsigned T)
: DebugInfoDesc(T)
, Anchor(NULL)
{}
/// ApplyToFields - Target the visitor to the fields of the AnchoredDesc.
///
void AnchoredDesc::ApplyToFields(DIVisitor *Visitor) {
DebugInfoDesc::ApplyToFields(Visitor);
Visitor->Apply(Anchor);
}
//===----------------------------------------------------------------------===//
CompileUnitDesc::CompileUnitDesc()
: AnchoredDesc(DW_TAG_compile_unit)
, Language(0)
, FileName("")
, Directory("")
, Producer("")
{}
// Implement isa/cast/dyncast.
bool CompileUnitDesc::classof(const DebugInfoDesc *D) {
return D->getTag() == DW_TAG_compile_unit;
}
/// ApplyToFields - Target the visitor to the fields of the CompileUnitDesc.
///
void CompileUnitDesc::ApplyToFields(DIVisitor *Visitor) {
AnchoredDesc::ApplyToFields(Visitor);
// Handle cases out of sync with compiler.
if (getVersion() == 0) {
unsigned DebugVersion;
Visitor->Apply(DebugVersion);
}
Visitor->Apply(Language);
Visitor->Apply(FileName);
Visitor->Apply(Directory);
Visitor->Apply(Producer);
}
/// getDescString - Return a string used to compose global names and labels.
///
const char *CompileUnitDesc::getDescString() const {
return "llvm.dbg.compile_unit";
}
/// getTypeString - Return a string used to label this descriptors type.
///
const char *CompileUnitDesc::getTypeString() const {
return "llvm.dbg.compile_unit.type";
}
/// getAnchorString - Return a string used to label this descriptor's anchor.
///
const char *CompileUnitDesc::AnchorString = "llvm.dbg.compile_units";
const char *CompileUnitDesc::getAnchorString() const {
return AnchorString;
}
#ifndef NDEBUG
void CompileUnitDesc::dump() {
std::cerr << getDescString() << " "
<< "Version(" << getVersion() << "), "
<< "Tag(" << getTag() << "), "
<< "Anchor(" << getAnchor() << "), "
<< "Language(" << Language << "), "
<< "FileName(\"" << FileName << "\"), "
<< "Directory(\"" << Directory << "\"), "
<< "Producer(\"" << Producer << "\")\n";
}
#endif
//===----------------------------------------------------------------------===//
TypeDesc::TypeDesc(unsigned T)
: DebugInfoDesc(T)
, Context(NULL)
, Name("")
, File(NULL)
, Line(0)
, Size(0)
, Align(0)
, Offset(0)
{}
/// ApplyToFields - Target the visitor to the fields of the TypeDesc.
///
void TypeDesc::ApplyToFields(DIVisitor *Visitor) {
DebugInfoDesc::ApplyToFields(Visitor);
Visitor->Apply(Context);
Visitor->Apply(Name);
Visitor->Apply(File);
Visitor->Apply(Line);
Visitor->Apply(Size);
Visitor->Apply(Align);
Visitor->Apply(Offset);
}
/// getDescString - Return a string used to compose global names and labels.
///
const char *TypeDesc::getDescString() const {
return "llvm.dbg.type";
}
/// getTypeString - Return a string used to label this descriptor's type.
///
const char *TypeDesc::getTypeString() const {
return "llvm.dbg.type.type";
}
#ifndef NDEBUG
void TypeDesc::dump() {
std::cerr << getDescString() << " "
<< "Version(" << getVersion() << "), "
<< "Tag(" << getTag() << "), "
<< "Context(" << Context << "), "
<< "Name(\"" << Name << "\"), "
<< "File(" << File << "), "
<< "Line(" << Line << "), "
<< "Size(" << Size << "), "
<< "Align(" << Align << "), "
<< "Offset(" << Offset << ")\n";
}
#endif
//===----------------------------------------------------------------------===//
BasicTypeDesc::BasicTypeDesc()
: TypeDesc(DW_TAG_base_type)
, Encoding(0)
{}
// Implement isa/cast/dyncast.
bool BasicTypeDesc::classof(const DebugInfoDesc *D) {
return D->getTag() == DW_TAG_base_type;
}
/// ApplyToFields - Target the visitor to the fields of the BasicTypeDesc.
///
void BasicTypeDesc::ApplyToFields(DIVisitor *Visitor) {
TypeDesc::ApplyToFields(Visitor);
Visitor->Apply(Encoding);
}
/// getDescString - Return a string used to compose global names and labels.
///
const char *BasicTypeDesc::getDescString() const {
return "llvm.dbg.basictype";
}
/// getTypeString - Return a string used to label this descriptor's type.
///
const char *BasicTypeDesc::getTypeString() const {
return "llvm.dbg.basictype.type";
}
#ifndef NDEBUG
void BasicTypeDesc::dump() {
std::cerr << getDescString() << " "
<< "Version(" << getVersion() << "), "
<< "Tag(" << getTag() << "), "
<< "Context(" << getContext() << "), "
<< "Name(\"" << getName() << "\"), "
<< "Size(" << getSize() << "), "
<< "Encoding(" << Encoding << ")\n";
}
#endif
//===----------------------------------------------------------------------===//
DerivedTypeDesc::DerivedTypeDesc(unsigned T)
: TypeDesc(T)
, FromType(NULL)
{}
// Implement isa/cast/dyncast.
bool DerivedTypeDesc::classof(const DebugInfoDesc *D) {
unsigned T = D->getTag();
switch (T) {
case DW_TAG_typedef:
case DW_TAG_pointer_type:
case DW_TAG_reference_type:
case DW_TAG_const_type:
case DW_TAG_volatile_type:
case DW_TAG_restrict_type:
case DW_TAG_member:
return true;
default: break;
}
return false;
}
/// ApplyToFields - Target the visitor to the fields of the DerivedTypeDesc.
///
void DerivedTypeDesc::ApplyToFields(DIVisitor *Visitor) {
TypeDesc::ApplyToFields(Visitor);
Visitor->Apply(FromType);
}
/// getDescString - Return a string used to compose global names and labels.
///
const char *DerivedTypeDesc::getDescString() const {
return "llvm.dbg.derivedtype";
}
/// getTypeString - Return a string used to label this descriptor's type.
///
const char *DerivedTypeDesc::getTypeString() const {
return "llvm.dbg.derivedtype.type";
}
#ifndef NDEBUG
void DerivedTypeDesc::dump() {
std::cerr << getDescString() << " "
<< "Version(" << getVersion() << "), "
<< "Tag(" << getTag() << "), "
<< "Context(" << getContext() << "), "
<< "Name(\"" << getName() << "\"), "
<< "Size(" << getSize() << "), "
<< "File(" << getFile() << "), "
<< "Line(" << getLine() << "), "
<< "FromType(" << FromType << ")\n";
}
#endif
//===----------------------------------------------------------------------===//
CompositeTypeDesc::CompositeTypeDesc(unsigned T)
: DerivedTypeDesc(T)
, Elements()
{}
// Implement isa/cast/dyncast.
bool CompositeTypeDesc::classof(const DebugInfoDesc *D) {
unsigned T = D->getTag();
switch (T) {
case DW_TAG_array_type:
case DW_TAG_structure_type:
case DW_TAG_union_type:
case DW_TAG_enumeration_type:
case DW_TAG_vector_type:
case DW_TAG_subroutine_type:
return true;
default: break;
}
return false;
}
/// ApplyToFields - Target the visitor to the fields of the CompositeTypeDesc.
///
void CompositeTypeDesc::ApplyToFields(DIVisitor *Visitor) {
DerivedTypeDesc::ApplyToFields(Visitor);
Visitor->Apply(Elements);
}
/// getDescString - Return a string used to compose global names and labels.
///
const char *CompositeTypeDesc::getDescString() const {
return "llvm.dbg.compositetype";
}
/// getTypeString - Return a string used to label this descriptor's type.
///
const char *CompositeTypeDesc::getTypeString() const {
return "llvm.dbg.compositetype.type";
}
#ifndef NDEBUG
void CompositeTypeDesc::dump() {
std::cerr << getDescString() << " "
<< "Version(" << getVersion() << "), "
<< "Tag(" << getTag() << "), "
<< "Context(" << getContext() << "), "
<< "Name(\"" << getName() << "\"), "
<< "Size(" << getSize() << "), "
<< "File(" << getFile() << "), "
<< "Line(" << getLine() << "), "
<< "FromType(" << getFromType() << "), "
<< "Elements.size(" << Elements.size() << ")\n";
}
#endif
//===----------------------------------------------------------------------===//
SubrangeDesc::SubrangeDesc()
: DebugInfoDesc(DW_TAG_subrange_type)
, Lo(0)
, Hi(0)
{}
// Implement isa/cast/dyncast.
bool SubrangeDesc::classof(const DebugInfoDesc *D) {
return D->getTag() == DW_TAG_subrange_type;
}
/// ApplyToFields - Target the visitor to the fields of the SubrangeDesc.
///
void SubrangeDesc::ApplyToFields(DIVisitor *Visitor) {
DebugInfoDesc::ApplyToFields(Visitor);
Visitor->Apply(Lo);
Visitor->Apply(Hi);
}
/// getDescString - Return a string used to compose global names and labels.
///
const char *SubrangeDesc::getDescString() const {
return "llvm.dbg.subrange";
}
/// getTypeString - Return a string used to label this descriptor's type.
///
const char *SubrangeDesc::getTypeString() const {
return "llvm.dbg.subrange.type";
}
#ifndef NDEBUG
void SubrangeDesc::dump() {
std::cerr << getDescString() << " "
<< "Version(" << getVersion() << "), "
<< "Tag(" << getTag() << "), "
<< "Lo(" << Lo << "), "
<< "Hi(" << Hi << ")\n";
}
#endif
//===----------------------------------------------------------------------===//
EnumeratorDesc::EnumeratorDesc()
: DebugInfoDesc(DW_TAG_enumerator)
, Name("")
, Value(0)
{}
// Implement isa/cast/dyncast.
bool EnumeratorDesc::classof(const DebugInfoDesc *D) {
return D->getTag() == DW_TAG_enumerator;
}
/// ApplyToFields - Target the visitor to the fields of the EnumeratorDesc.
///
void EnumeratorDesc::ApplyToFields(DIVisitor *Visitor) {
DebugInfoDesc::ApplyToFields(Visitor);
Visitor->Apply(Name);
Visitor->Apply(Value);
}
/// getDescString - Return a string used to compose global names and labels.
///
const char *EnumeratorDesc::getDescString() const {
return "llvm.dbg.enumerator";
}
/// getTypeString - Return a string used to label this descriptor's type.
///
const char *EnumeratorDesc::getTypeString() const {
return "llvm.dbg.enumerator.type";
}
#ifndef NDEBUG
void EnumeratorDesc::dump() {
std::cerr << getDescString() << " "
<< "Version(" << getVersion() << "), "
<< "Tag(" << getTag() << "), "
<< "Name(" << Name << "), "
<< "Value(" << Value << ")\n";
}
#endif
//===----------------------------------------------------------------------===//
VariableDesc::VariableDesc(unsigned T)
: DebugInfoDesc(T)
, Context(NULL)
, Name("")
, File(NULL)
, Line(0)
, TyDesc(0)
{}
// Implement isa/cast/dyncast.
bool VariableDesc::classof(const DebugInfoDesc *D) {
unsigned T = D->getTag();
switch (T) {
case DW_TAG_auto_variable:
case DW_TAG_arg_variable:
case DW_TAG_return_variable:
return true;
default: break;
}
return false;
}
/// ApplyToFields - Target the visitor to the fields of the VariableDesc.
///
void VariableDesc::ApplyToFields(DIVisitor *Visitor) {
DebugInfoDesc::ApplyToFields(Visitor);
Visitor->Apply(Context);
Visitor->Apply(Name);
Visitor->Apply(File);
Visitor->Apply(Line);
Visitor->Apply(TyDesc);
}
/// getDescString - Return a string used to compose global names and labels.
///
const char *VariableDesc::getDescString() const {
return "llvm.dbg.variable";
}
/// getTypeString - Return a string used to label this descriptor's type.
///
const char *VariableDesc::getTypeString() const {
return "llvm.dbg.variable.type";
}
#ifndef NDEBUG
void VariableDesc::dump() {
std::cerr << getDescString() << " "
<< "Version(" << getVersion() << "), "
<< "Tag(" << getTag() << "), "
<< "Context(" << Context << "), "
<< "Name(\"" << Name << "\"), "
<< "File(" << File << "), "
<< "Line(" << Line << "), "
<< "TyDesc(" << TyDesc << ")\n";
}
#endif
//===----------------------------------------------------------------------===//
GlobalDesc::GlobalDesc(unsigned T)
: AnchoredDesc(T)
, Context(0)
, Name("")
, File(NULL)
, Line(0)
, TyDesc(NULL)
, IsStatic(false)
, IsDefinition(false)
{}
/// ApplyToFields - Target the visitor to the fields of the global.
///
void GlobalDesc::ApplyToFields(DIVisitor *Visitor) {
AnchoredDesc::ApplyToFields(Visitor);
Visitor->Apply(Context);
Visitor->Apply(Name);
Visitor->Apply(File);
Visitor->Apply(Line);
Visitor->Apply(TyDesc);
Visitor->Apply(IsStatic);
Visitor->Apply(IsDefinition);
}
//===----------------------------------------------------------------------===//
GlobalVariableDesc::GlobalVariableDesc()
: GlobalDesc(DW_TAG_variable)
, Global(NULL)
{}
// Implement isa/cast/dyncast.
bool GlobalVariableDesc::classof(const DebugInfoDesc *D) {
return D->getTag() == DW_TAG_variable;
}
/// ApplyToFields - Target the visitor to the fields of the GlobalVariableDesc.
///
void GlobalVariableDesc::ApplyToFields(DIVisitor *Visitor) {
GlobalDesc::ApplyToFields(Visitor);
Visitor->Apply(Global);
}
/// getDescString - Return a string used to compose global names and labels.
///
const char *GlobalVariableDesc::getDescString() const {
return "llvm.dbg.global_variable";
}
/// getTypeString - Return a string used to label this descriptors type.
///
const char *GlobalVariableDesc::getTypeString() const {
return "llvm.dbg.global_variable.type";
}
/// getAnchorString - Return a string used to label this descriptor's anchor.
///
const char *GlobalVariableDesc::AnchorString = "llvm.dbg.global_variables";
const char *GlobalVariableDesc::getAnchorString() const {
return AnchorString;
}
#ifndef NDEBUG
void GlobalVariableDesc::dump() {
std::cerr << getDescString() << " "
<< "Version(" << getVersion() << "), "
<< "Tag(" << getTag() << "), "
<< "Anchor(" << getAnchor() << "), "
<< "Name(\"" << getName() << "\"), "
<< "File(" << getFile() << "),"
<< "Line(" << getLine() << "),"
<< "Type(\"" << getType() << "\"), "
<< "IsStatic(" << (isStatic() ? "true" : "false") << "), "
<< "IsDefinition(" << (isDefinition() ? "true" : "false") << "), "
<< "Global(" << Global << ")\n";
}
#endif
//===----------------------------------------------------------------------===//
SubprogramDesc::SubprogramDesc()
: GlobalDesc(DW_TAG_subprogram)
{}
// Implement isa/cast/dyncast.
bool SubprogramDesc::classof(const DebugInfoDesc *D) {
return D->getTag() == DW_TAG_subprogram;
}
/// ApplyToFields - Target the visitor to the fields of the
/// SubprogramDesc.
void SubprogramDesc::ApplyToFields(DIVisitor *Visitor) {
GlobalDesc::ApplyToFields(Visitor);
}
/// getDescString - Return a string used to compose global names and labels.
///
const char *SubprogramDesc::getDescString() const {
return "llvm.dbg.subprogram";
}
/// getTypeString - Return a string used to label this descriptors type.
///
const char *SubprogramDesc::getTypeString() const {
return "llvm.dbg.subprogram.type";
}
/// getAnchorString - Return a string used to label this descriptor's anchor.
///
const char *SubprogramDesc::AnchorString = "llvm.dbg.subprograms";
const char *SubprogramDesc::getAnchorString() const {
return AnchorString;
}
#ifndef NDEBUG
void SubprogramDesc::dump() {
std::cerr << getDescString() << " "
<< "Version(" << getVersion() << "), "
<< "Tag(" << getTag() << "), "
<< "Anchor(" << getAnchor() << "), "
<< "Name(\"" << getName() << "\"), "
<< "File(" << getFile() << "),"
<< "Line(" << getLine() << "),"
<< "Type(\"" << getType() << "\"), "
<< "IsStatic(" << (isStatic() ? "true" : "false") << "), "
<< "IsDefinition(" << (isDefinition() ? "true" : "false") << ")\n";
}
#endif
//===----------------------------------------------------------------------===//
BlockDesc::BlockDesc()
: DebugInfoDesc(DW_TAG_lexical_block)
, Context(NULL)
{}
// Implement isa/cast/dyncast.
bool BlockDesc::classof(const DebugInfoDesc *D) {
return D->getTag() == DW_TAG_lexical_block;
}
/// ApplyToFields - Target the visitor to the fields of the BlockDesc.
///
void BlockDesc::ApplyToFields(DIVisitor *Visitor) {
DebugInfoDesc::ApplyToFields(Visitor);
Visitor->Apply(Context);
}
/// getDescString - Return a string used to compose global names and labels.
///
const char *BlockDesc::getDescString() const {
return "llvm.dbg.block";
}
/// getTypeString - Return a string used to label this descriptors type.
///
const char *BlockDesc::getTypeString() const {
return "llvm.dbg.block.type";
}
#ifndef NDEBUG
void BlockDesc::dump() {
std::cerr << getDescString() << " "
<< "Version(" << getVersion() << "), "
<< "Tag(" << getTag() << "),"
<< "Context(" << Context << ")\n";
}
#endif
//===----------------------------------------------------------------------===//
DebugInfoDesc *DIDeserializer::Deserialize(Value *V) {
return Deserialize(getGlobalVariable(V));
}
DebugInfoDesc *DIDeserializer::Deserialize(GlobalVariable *GV) {
// Handle NULL.
if (!GV) return NULL;
// Check to see if it has been already deserialized.
DebugInfoDesc *&Slot = GlobalDescs[GV];
if (Slot) return Slot;
// Get the Tag from the global.
unsigned Tag = DebugInfoDesc::TagFromGlobal(GV);
// Create an empty instance of the correct sort.
Slot = DebugInfoDesc::DescFactory(Tag);
// If not a user defined descriptor.
if (Slot) {
// Deserialize the fields.
DIDeserializeVisitor DRAM(*this, GV);
DRAM.ApplyToFields(Slot);
}
return Slot;
}
//===----------------------------------------------------------------------===//
/// getStrPtrType - Return a "sbyte *" type.
///
const PointerType *DISerializer::getStrPtrType() {
// If not already defined.
if (!StrPtrTy) {
// Construct the pointer to signed bytes.
StrPtrTy = PointerType::get(Type::SByteTy);
}
return StrPtrTy;
}
/// getEmptyStructPtrType - Return a "{ }*" type.
///
const PointerType *DISerializer::getEmptyStructPtrType() {
// If not already defined.
if (!EmptyStructPtrTy) {
// Construct the empty structure type.
const StructType *EmptyStructTy =
StructType::get(std::vector<const Type*>());
// Construct the pointer to empty structure type.
EmptyStructPtrTy = PointerType::get(EmptyStructTy);
}
return EmptyStructPtrTy;
}
/// getTagType - Return the type describing the specified descriptor (via tag.)
///
const StructType *DISerializer::getTagType(DebugInfoDesc *DD) {
// Attempt to get the previously defined type.
StructType *&Ty = TagTypes[DD->getTag()];
// If not already defined.
if (!Ty) {
// Set up fields vector.
std::vector<const Type*> Fields;
// Get types of fields.
DIGetTypesVisitor GTAM(*this, Fields);
GTAM.ApplyToFields(DD);
// Construct structured type.
Ty = StructType::get(Fields);
// Register type name with module.
M->addTypeName(DD->getTypeString(), Ty);
}
return Ty;
}
/// getString - Construct the string as constant string global.
///
Constant *DISerializer::getString(const std::string &String) {
// Check string cache for previous edition.
Constant *&Slot = StringCache[String];
// Return Constant if previously defined.
if (Slot) return Slot;
// If empty string then use a sbyte* null instead.
if (String.empty()) {
Slot = ConstantPointerNull::get(getStrPtrType());
} else {
// Construct string as an llvm constant.
Constant *ConstStr = ConstantArray::get(String);
// Otherwise create and return a new string global.
GlobalVariable *StrGV = new GlobalVariable(ConstStr->getType(), true,
GlobalVariable::InternalLinkage,
ConstStr, "str", M);
StrGV->setSection("llvm.metadata");
// Convert to generic string pointer.
Slot = ConstantExpr::getCast(StrGV, getStrPtrType());
}
return Slot;
}
/// Serialize - Recursively cast the specified descriptor into a GlobalVariable
/// so that it can be serialized to a .bc or .ll file.
GlobalVariable *DISerializer::Serialize(DebugInfoDesc *DD) {
// Check if the DebugInfoDesc is already in the map.
GlobalVariable *&Slot = DescGlobals[DD];
// See if DebugInfoDesc exists, if so return prior GlobalVariable.
if (Slot) return Slot;
// Get the type associated with the Tag.
const StructType *Ty = getTagType(DD);
// Create the GlobalVariable early to prevent infinite recursion.
GlobalVariable *GV = new GlobalVariable(Ty, true, DD->getLinkage(),
NULL, DD->getDescString(), M);
GV->setSection("llvm.metadata");
// Insert new GlobalVariable in DescGlobals map.
Slot = GV;
// Set up elements vector
std::vector<Constant*> Elements;
// Add fields.
DISerializeVisitor SRAM(*this, Elements);
SRAM.ApplyToFields(DD);
// Set the globals initializer.
GV->setInitializer(ConstantStruct::get(Ty, Elements));
return GV;
}
//===----------------------------------------------------------------------===//
/// Verify - Return true if the GlobalVariable appears to be a valid
/// serialization of a DebugInfoDesc.
bool DIVerifier::Verify(Value *V) {
return !V || Verify(getGlobalVariable(V));
}
bool DIVerifier::Verify(GlobalVariable *GV) {
// NULLs are valid.
if (!GV) return true;
// Check prior validity.
unsigned &ValiditySlot = Validity[GV];
// If visited before then use old state.
if (ValiditySlot) return ValiditySlot == Valid;
// Assume validity for the time being (recursion.)
ValiditySlot = Valid;
// Make sure the global is internal or link once (anchor.)
if (GV->getLinkage() != GlobalValue::InternalLinkage &&
GV->getLinkage() != GlobalValue::LinkOnceLinkage) {
ValiditySlot = Invalid;
return false;
}
// Get the Tag
unsigned Tag = DebugInfoDesc::TagFromGlobal(GV);
// Check for user defined descriptors.
if (Tag == DW_TAG_invalid) return true;
// Construct an empty DebugInfoDesc.
DebugInfoDesc *DD = DebugInfoDesc::DescFactory(Tag);
// Allow for user defined descriptors.
if (!DD) return true;
// Get the initializer constant.
ConstantStruct *CI = cast<ConstantStruct>(GV->getInitializer());
// Get the operand count.
unsigned N = CI->getNumOperands();
// Get the field count.
unsigned &CountSlot = Counts[Tag];
if (!CountSlot) {
// Check the operand count to the field count
DICountVisitor CTAM;
CTAM.ApplyToFields(DD);
CountSlot = CTAM.getCount();
}
// Field count must be at most equal operand count.
if (CountSlot > N) {
delete DD;
ValiditySlot = Invalid;
return false;
}
// Check each field for valid type.
DIVerifyVisitor VRAM(*this, GV);
VRAM.ApplyToFields(DD);
// Release empty DebugInfoDesc.
delete DD;
// If fields are not valid.
if (!VRAM.isValid()) {
ValiditySlot = Invalid;
return false;
}
return true;
}
//===----------------------------------------------------------------------===//
DebugScope::~DebugScope() {
for (unsigned i = 0, N = Scopes.size(); i < N; ++i) delete Scopes[i];
for (unsigned j = 0, M = Variables.size(); j < M; ++j) delete Variables[j];
}
//===----------------------------------------------------------------------===//
MachineDebugInfo::MachineDebugInfo()
: DR()
, VR()
, CompileUnits()
, Directories()
, SourceFiles()
, Lines()
, LabelID(0)
, ScopeMap()
, RootScope(NULL)
, FrameMoves()
{}
MachineDebugInfo::~MachineDebugInfo() {
}
/// doInitialization - Initialize the debug state for a new module.
///
bool MachineDebugInfo::doInitialization() {
return false;
}
/// doFinalization - Tear down the debug state after completion of a module.
///
bool MachineDebugInfo::doFinalization() {
return false;
}
/// BeginFunction - Begin gathering function debug information.
///
void MachineDebugInfo::BeginFunction(MachineFunction *MF) {
// Coming soon.
}
/// MachineDebugInfo::EndFunction - Discard function debug information.
///
void MachineDebugInfo::EndFunction() {
// Clean up scope information.
if (RootScope) {
delete RootScope;
ScopeMap.clear();
RootScope = NULL;
}
// Clean up frame info.
for (unsigned i = 0, N = FrameMoves.size(); i < N; ++i) delete FrameMoves[i];
FrameMoves.clear();
}
/// getDescFor - Convert a Value to a debug information descriptor.
///
// FIXME - use new Value type when available.
DebugInfoDesc *MachineDebugInfo::getDescFor(Value *V) {
return DR.Deserialize(V);
}
/// Verify - Verify that a Value is debug information descriptor.
///
bool MachineDebugInfo::Verify(Value *V) {
return VR.Verify(V);
}
/// AnalyzeModule - Scan the module for global debug information.
///
void MachineDebugInfo::AnalyzeModule(Module &M) {
SetupCompileUnits(M);
}
/// SetupCompileUnits - Set up the unique vector of compile units.
///
void MachineDebugInfo::SetupCompileUnits(Module &M) {
std::vector<CompileUnitDesc *>CU = getAnchoredDescriptors<CompileUnitDesc>(M);
for (unsigned i = 0, N = CU.size(); i < N; i++) {
CompileUnits.insert(CU[i]);
}
}
/// getCompileUnits - Return a vector of debug compile units.
///
const UniqueVector<CompileUnitDesc *> MachineDebugInfo::getCompileUnits()const{
return CompileUnits;
}
/// getGlobalVariablesUsing - Return all of the GlobalVariables that use the
/// named GlobalVariable.
std::vector<GlobalVariable*>
MachineDebugInfo::getGlobalVariablesUsing(Module &M,
const std::string &RootName) {
return ::getGlobalVariablesUsing(M, RootName);
}
/// RecordLabel - Records location information and associates it with a
/// debug label. Returns a unique label ID used to generate a label and
/// provide correspondence to the source line list.
unsigned MachineDebugInfo::RecordLabel(unsigned Line, unsigned Column,
unsigned Source) {
unsigned ID = NextLabelID();
Lines.push_back(new SourceLineInfo(Line, Column, Source, ID));
return ID;
}
/// RecordSource - Register a source file with debug info. Returns an source
/// ID.
unsigned MachineDebugInfo::RecordSource(const std::string &Directory,
const std::string &Source) {
unsigned DirectoryID = Directories.insert(Directory);
return SourceFiles.insert(SourceFileInfo(DirectoryID, Source));
}
unsigned MachineDebugInfo::RecordSource(const CompileUnitDesc *CompileUnit) {
return RecordSource(CompileUnit->getDirectory(),
CompileUnit->getFileName());
}
/// RecordRegionStart - Indicate the start of a region.
///
unsigned MachineDebugInfo::RecordRegionStart(Value *V) {
// FIXME - need to be able to handle split scopes because of bb cloning.
DebugInfoDesc *ScopeDesc = DR.Deserialize(V);
DebugScope *Scope = getOrCreateScope(ScopeDesc);
unsigned ID = NextLabelID();
if (!Scope->getStartLabelID()) Scope->setStartLabelID(ID);
return ID;
}
/// RecordRegionEnd - Indicate the end of a region.
///
unsigned MachineDebugInfo::RecordRegionEnd(Value *V) {
// FIXME - need to be able to handle split scopes because of bb cloning.
DebugInfoDesc *ScopeDesc = DR.Deserialize(V);
DebugScope *Scope = getOrCreateScope(ScopeDesc);
unsigned ID = NextLabelID();
Scope->setEndLabelID(ID);
return ID;
}
/// RecordVariable - Indicate the declaration of a local variable.
///
void MachineDebugInfo::RecordVariable(Value *V, unsigned FrameIndex) {
VariableDesc *VD = cast<VariableDesc>(DR.Deserialize(V));
DebugScope *Scope = getOrCreateScope(VD->getContext());
DebugVariable *DV = new DebugVariable(VD, FrameIndex);
Scope->AddVariable(DV);
}
/// getOrCreateScope - Returns the scope associated with the given descriptor.
///
DebugScope *MachineDebugInfo::getOrCreateScope(DebugInfoDesc *ScopeDesc) {
DebugScope *&Slot = ScopeMap[ScopeDesc];
if (!Slot) {
// FIXME - breaks down when the context is an inlined function.
DebugInfoDesc *ParentDesc = NULL;
if (BlockDesc *Block = dyn_cast<BlockDesc>(ScopeDesc)) {
ParentDesc = Block->getContext();
}
DebugScope *Parent = ParentDesc ? getOrCreateScope(ParentDesc) : NULL;
Slot = new DebugScope(Parent, ScopeDesc);
if (Parent) {
Parent->AddScope(Slot);
} else if (RootScope) {
// FIXME - Add inlined function scopes to the root so we can delete
// them later. Long term, handle inlined functions properly.
RootScope->AddScope(Slot);
} else {
// First function is top level function.
RootScope = Slot;
}
}
return Slot;
}
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