summaryrefslogtreecommitdiffstats
path: root/contrib/llvm/lib/Analysis/DebugInfo.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'contrib/llvm/lib/Analysis/DebugInfo.cpp')
-rw-r--r--contrib/llvm/lib/Analysis/DebugInfo.cpp1479
1 files changed, 1479 insertions, 0 deletions
diff --git a/contrib/llvm/lib/Analysis/DebugInfo.cpp b/contrib/llvm/lib/Analysis/DebugInfo.cpp
new file mode 100644
index 0000000..c8d0d22
--- /dev/null
+++ b/contrib/llvm/lib/Analysis/DebugInfo.cpp
@@ -0,0 +1,1479 @@
+//===--- DebugInfo.cpp - Debug Information Helper Classes -----------------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the helper classes used to build and interpret debug
+// information in LLVM IR form.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Analysis/DebugInfo.h"
+#include "llvm/Target/TargetMachine.h" // FIXME: LAYERING VIOLATION!
+#include "llvm/Constants.h"
+#include "llvm/DerivedTypes.h"
+#include "llvm/Intrinsics.h"
+#include "llvm/IntrinsicInst.h"
+#include "llvm/Instructions.h"
+#include "llvm/Module.h"
+#include "llvm/Analysis/ValueTracking.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/Dwarf.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+using namespace llvm::dwarf;
+
+//===----------------------------------------------------------------------===//
+// DIDescriptor
+//===----------------------------------------------------------------------===//
+
+StringRef
+DIDescriptor::getStringField(unsigned Elt) const {
+ if (DbgNode == 0)
+ return StringRef();
+
+ if (Elt < DbgNode->getNumOperands())
+ if (MDString *MDS = dyn_cast_or_null<MDString>(DbgNode->getOperand(Elt)))
+ return MDS->getString();
+
+ return StringRef();
+}
+
+uint64_t DIDescriptor::getUInt64Field(unsigned Elt) const {
+ if (DbgNode == 0)
+ return 0;
+
+ if (Elt < DbgNode->getNumOperands())
+ if (ConstantInt *CI = dyn_cast<ConstantInt>(DbgNode->getOperand(Elt)))
+ return CI->getZExtValue();
+
+ return 0;
+}
+
+DIDescriptor DIDescriptor::getDescriptorField(unsigned Elt) const {
+ if (DbgNode == 0)
+ return DIDescriptor();
+
+ if (Elt < DbgNode->getNumOperands())
+ return DIDescriptor(dyn_cast_or_null<const MDNode>(DbgNode->getOperand(Elt)));
+ return DIDescriptor();
+}
+
+GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
+ if (DbgNode == 0)
+ return 0;
+
+ if (Elt < DbgNode->getNumOperands())
+ return dyn_cast_or_null<GlobalVariable>(DbgNode->getOperand(Elt));
+ return 0;
+}
+
+Function *DIDescriptor::getFunctionField(unsigned Elt) const {
+ if (DbgNode == 0)
+ return 0;
+
+ if (Elt < DbgNode->getNumOperands())
+ return dyn_cast_or_null<Function>(DbgNode->getOperand(Elt));
+ return 0;
+}
+
+unsigned DIVariable::getNumAddrElements() const {
+ return DbgNode->getNumOperands()-6;
+}
+
+
+//===----------------------------------------------------------------------===//
+// Predicates
+//===----------------------------------------------------------------------===//
+
+/// isBasicType - Return true if the specified tag is legal for
+/// DIBasicType.
+bool DIDescriptor::isBasicType() const {
+ return DbgNode && getTag() == dwarf::DW_TAG_base_type;
+}
+
+/// isDerivedType - Return true if the specified tag is legal for DIDerivedType.
+bool DIDescriptor::isDerivedType() const {
+ if (!DbgNode) return false;
+ switch (getTag()) {
+ case dwarf::DW_TAG_typedef:
+ case dwarf::DW_TAG_pointer_type:
+ case dwarf::DW_TAG_reference_type:
+ case dwarf::DW_TAG_const_type:
+ case dwarf::DW_TAG_volatile_type:
+ case dwarf::DW_TAG_restrict_type:
+ case dwarf::DW_TAG_member:
+ case dwarf::DW_TAG_inheritance:
+ return true;
+ default:
+ // CompositeTypes are currently modelled as DerivedTypes.
+ return isCompositeType();
+ }
+}
+
+/// isCompositeType - Return true if the specified tag is legal for
+/// DICompositeType.
+bool DIDescriptor::isCompositeType() const {
+ if (!DbgNode) return false;
+ switch (getTag()) {
+ case dwarf::DW_TAG_array_type:
+ case dwarf::DW_TAG_structure_type:
+ case dwarf::DW_TAG_union_type:
+ case dwarf::DW_TAG_enumeration_type:
+ case dwarf::DW_TAG_vector_type:
+ case dwarf::DW_TAG_subroutine_type:
+ case dwarf::DW_TAG_class_type:
+ return true;
+ default:
+ return false;
+ }
+}
+
+/// isVariable - Return true if the specified tag is legal for DIVariable.
+bool DIDescriptor::isVariable() const {
+ if (!DbgNode) return false;
+ switch (getTag()) {
+ case dwarf::DW_TAG_auto_variable:
+ case dwarf::DW_TAG_arg_variable:
+ case dwarf::DW_TAG_return_variable:
+ return true;
+ default:
+ return false;
+ }
+}
+
+/// isType - Return true if the specified tag is legal for DIType.
+bool DIDescriptor::isType() const {
+ return isBasicType() || isCompositeType() || isDerivedType();
+}
+
+/// isSubprogram - Return true if the specified tag is legal for
+/// DISubprogram.
+bool DIDescriptor::isSubprogram() const {
+ return DbgNode && getTag() == dwarf::DW_TAG_subprogram;
+}
+
+/// isGlobalVariable - Return true if the specified tag is legal for
+/// DIGlobalVariable.
+bool DIDescriptor::isGlobalVariable() const {
+ return DbgNode && getTag() == dwarf::DW_TAG_variable;
+}
+
+/// isGlobal - Return true if the specified tag is legal for DIGlobal.
+bool DIDescriptor::isGlobal() const {
+ return isGlobalVariable();
+}
+
+/// isScope - Return true if the specified tag is one of the scope
+/// related tag.
+bool DIDescriptor::isScope() const {
+ if (!DbgNode) return false;
+ switch (getTag()) {
+ case dwarf::DW_TAG_compile_unit:
+ case dwarf::DW_TAG_lexical_block:
+ case dwarf::DW_TAG_subprogram:
+ case dwarf::DW_TAG_namespace:
+ return true;
+ default:
+ break;
+ }
+ return false;
+}
+
+/// isCompileUnit - Return true if the specified tag is DW_TAG_compile_unit.
+bool DIDescriptor::isCompileUnit() const {
+ return DbgNode && getTag() == dwarf::DW_TAG_compile_unit;
+}
+
+/// isFile - Return true if the specified tag is DW_TAG_file_type.
+bool DIDescriptor::isFile() const {
+ return DbgNode && getTag() == dwarf::DW_TAG_file_type;
+}
+
+/// isNameSpace - Return true if the specified tag is DW_TAG_namespace.
+bool DIDescriptor::isNameSpace() const {
+ return DbgNode && getTag() == dwarf::DW_TAG_namespace;
+}
+
+/// isLexicalBlock - Return true if the specified tag is DW_TAG_lexical_block.
+bool DIDescriptor::isLexicalBlock() const {
+ return DbgNode && getTag() == dwarf::DW_TAG_lexical_block;
+}
+
+/// isSubrange - Return true if the specified tag is DW_TAG_subrange_type.
+bool DIDescriptor::isSubrange() const {
+ return DbgNode && getTag() == dwarf::DW_TAG_subrange_type;
+}
+
+/// isEnumerator - Return true if the specified tag is DW_TAG_enumerator.
+bool DIDescriptor::isEnumerator() const {
+ return DbgNode && getTag() == dwarf::DW_TAG_enumerator;
+}
+
+//===----------------------------------------------------------------------===//
+// Simple Descriptor Constructors and other Methods
+//===----------------------------------------------------------------------===//
+
+DIType::DIType(const MDNode *N) : DIScope(N) {
+ if (!N) return;
+ if (!isBasicType() && !isDerivedType() && !isCompositeType()) {
+ DbgNode = 0;
+ }
+}
+
+unsigned DIArray::getNumElements() const {
+ if (!DbgNode)
+ return 0;
+ return DbgNode->getNumOperands();
+}
+
+/// replaceAllUsesWith - Replace all uses of debug info referenced by
+/// this descriptor. After this completes, the current debug info value
+/// is erased.
+void DIDerivedType::replaceAllUsesWith(DIDescriptor &D) {
+ if (!DbgNode)
+ return;
+
+ // Since we use a TrackingVH for the node, its easy for clients to manufacture
+ // legitimate situations where they want to replaceAllUsesWith() on something
+ // which, due to uniquing, has merged with the source. We shield clients from
+ // this detail by allowing a value to be replaced with replaceAllUsesWith()
+ // itself.
+ if (DbgNode != D) {
+ MDNode *Node = const_cast<MDNode*>(DbgNode);
+ const MDNode *DN = D;
+ const Value *V = cast_or_null<Value>(DN);
+ Node->replaceAllUsesWith(const_cast<Value*>(V));
+ Node->destroy();
+ }
+}
+
+/// Verify - Verify that a compile unit is well formed.
+bool DICompileUnit::Verify() const {
+ if (!DbgNode)
+ return false;
+ StringRef N = getFilename();
+ if (N.empty())
+ return false;
+ // It is possible that directory and produce string is empty.
+ return true;
+}
+
+/// Verify - Verify that a type descriptor is well formed.
+bool DIType::Verify() const {
+ if (!DbgNode)
+ return false;
+ if (!getContext().Verify())
+ return false;
+
+ DICompileUnit CU = getCompileUnit();
+ if (!CU.Verify())
+ return false;
+ return true;
+}
+
+/// Verify - Verify that a composite type descriptor is well formed.
+bool DICompositeType::Verify() const {
+ if (!DbgNode)
+ return false;
+ if (!getContext().Verify())
+ return false;
+
+ DICompileUnit CU = getCompileUnit();
+ if (!CU.Verify())
+ return false;
+ return true;
+}
+
+/// Verify - Verify that a subprogram descriptor is well formed.
+bool DISubprogram::Verify() const {
+ if (!DbgNode)
+ return false;
+
+ if (!getContext().Verify())
+ return false;
+
+ DICompileUnit CU = getCompileUnit();
+ if (!CU.Verify())
+ return false;
+
+ DICompositeType Ty = getType();
+ if (!Ty.Verify())
+ return false;
+ return true;
+}
+
+/// Verify - Verify that a global variable descriptor is well formed.
+bool DIGlobalVariable::Verify() const {
+ if (!DbgNode)
+ return false;
+
+ if (getDisplayName().empty())
+ return false;
+
+ if (!getContext().Verify())
+ return false;
+
+ DICompileUnit CU = getCompileUnit();
+ if (!CU.Verify())
+ return false;
+
+ DIType Ty = getType();
+ if (!Ty.Verify())
+ return false;
+
+ if (!getGlobal())
+ return false;
+
+ return true;
+}
+
+/// Verify - Verify that a variable descriptor is well formed.
+bool DIVariable::Verify() const {
+ if (!DbgNode)
+ return false;
+
+ if (!getContext().Verify())
+ return false;
+
+ if (!getCompileUnit().Verify())
+ return false;
+
+ DIType Ty = getType();
+ if (!Ty.Verify())
+ return false;
+
+ return true;
+}
+
+/// Verify - Verify that a location descriptor is well formed.
+bool DILocation::Verify() const {
+ if (!DbgNode)
+ return false;
+
+ return DbgNode->getNumOperands() == 4;
+}
+
+/// Verify - Verify that a namespace descriptor is well formed.
+bool DINameSpace::Verify() const {
+ if (!DbgNode)
+ return false;
+ if (getName().empty())
+ return false;
+ if (!getCompileUnit().Verify())
+ return false;
+ return true;
+}
+
+/// getOriginalTypeSize - If this type is derived from a base type then
+/// return base type size.
+uint64_t DIDerivedType::getOriginalTypeSize() const {
+ unsigned Tag = getTag();
+ if (Tag == dwarf::DW_TAG_member || Tag == dwarf::DW_TAG_typedef ||
+ Tag == dwarf::DW_TAG_const_type || Tag == dwarf::DW_TAG_volatile_type ||
+ Tag == dwarf::DW_TAG_restrict_type) {
+ DIType BaseType = getTypeDerivedFrom();
+ // If this type is not derived from any type then take conservative
+ // approach.
+ if (!BaseType.isValid())
+ return getSizeInBits();
+ if (BaseType.isDerivedType())
+ return DIDerivedType(BaseType).getOriginalTypeSize();
+ else
+ return BaseType.getSizeInBits();
+ }
+
+ return getSizeInBits();
+}
+
+/// isInlinedFnArgument - Return trule if this variable provides debugging
+/// information for an inlined function arguments.
+bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
+ assert(CurFn && "Invalid function");
+ if (!getContext().isSubprogram())
+ return false;
+ // This variable is not inlined function argument if its scope
+ // does not describe current function.
+ return !(DISubprogram(getContext()).describes(CurFn));
+}
+
+/// describes - Return true if this subprogram provides debugging
+/// information for the function F.
+bool DISubprogram::describes(const Function *F) {
+ assert(F && "Invalid function");
+ if (F == getFunction())
+ return true;
+ StringRef Name = getLinkageName();
+ if (Name.empty())
+ Name = getName();
+ if (F->getName() == Name)
+ return true;
+ return false;
+}
+
+unsigned DISubprogram::isOptimized() const {
+ assert (DbgNode && "Invalid subprogram descriptor!");
+ if (DbgNode->getNumOperands() == 16)
+ return getUnsignedField(15);
+ return 0;
+}
+
+StringRef DIScope::getFilename() const {
+ if (!DbgNode)
+ return StringRef();
+ if (isLexicalBlock())
+ return DILexicalBlock(DbgNode).getFilename();
+ if (isSubprogram())
+ return DISubprogram(DbgNode).getFilename();
+ if (isCompileUnit())
+ return DICompileUnit(DbgNode).getFilename();
+ if (isNameSpace())
+ return DINameSpace(DbgNode).getFilename();
+ if (isType())
+ return DIType(DbgNode).getFilename();
+ if (isFile())
+ return DIFile(DbgNode).getFilename();
+ assert(0 && "Invalid DIScope!");
+ return StringRef();
+}
+
+StringRef DIScope::getDirectory() const {
+ if (!DbgNode)
+ return StringRef();
+ if (isLexicalBlock())
+ return DILexicalBlock(DbgNode).getDirectory();
+ if (isSubprogram())
+ return DISubprogram(DbgNode).getDirectory();
+ if (isCompileUnit())
+ return DICompileUnit(DbgNode).getDirectory();
+ if (isNameSpace())
+ return DINameSpace(DbgNode).getDirectory();
+ if (isType())
+ return DIType(DbgNode).getDirectory();
+ if (isFile())
+ return DIFile(DbgNode).getDirectory();
+ assert(0 && "Invalid DIScope!");
+ return StringRef();
+}
+
+//===----------------------------------------------------------------------===//
+// DIDescriptor: dump routines for all descriptors.
+//===----------------------------------------------------------------------===//
+
+
+/// print - Print descriptor.
+void DIDescriptor::print(raw_ostream &OS) const {
+ OS << "[" << dwarf::TagString(getTag()) << "] ";
+ OS.write_hex((intptr_t) &*DbgNode) << ']';
+}
+
+/// print - Print compile unit.
+void DICompileUnit::print(raw_ostream &OS) const {
+ if (getLanguage())
+ OS << " [" << dwarf::LanguageString(getLanguage()) << "] ";
+
+ OS << " [" << getDirectory() << "/" << getFilename() << "]";
+}
+
+/// print - Print type.
+void DIType::print(raw_ostream &OS) const {
+ if (!DbgNode) return;
+
+ StringRef Res = getName();
+ if (!Res.empty())
+ OS << " [" << Res << "] ";
+
+ unsigned Tag = getTag();
+ OS << " [" << dwarf::TagString(Tag) << "] ";
+
+ // TODO : Print context
+ getCompileUnit().print(OS);
+ OS << " ["
+ << "line " << getLineNumber() << ", "
+ << getSizeInBits() << " bits, "
+ << getAlignInBits() << " bit alignment, "
+ << getOffsetInBits() << " bit offset"
+ << "] ";
+
+ if (isPrivate())
+ OS << " [private] ";
+ else if (isProtected())
+ OS << " [protected] ";
+
+ if (isForwardDecl())
+ OS << " [fwd] ";
+
+ if (isBasicType())
+ DIBasicType(DbgNode).print(OS);
+ else if (isDerivedType())
+ DIDerivedType(DbgNode).print(OS);
+ else if (isCompositeType())
+ DICompositeType(DbgNode).print(OS);
+ else {
+ OS << "Invalid DIType\n";
+ return;
+ }
+
+ OS << "\n";
+}
+
+/// print - Print basic type.
+void DIBasicType::print(raw_ostream &OS) const {
+ OS << " [" << dwarf::AttributeEncodingString(getEncoding()) << "] ";
+}
+
+/// print - Print derived type.
+void DIDerivedType::print(raw_ostream &OS) const {
+ OS << "\n\t Derived From: "; getTypeDerivedFrom().print(OS);
+}
+
+/// print - Print composite type.
+void DICompositeType::print(raw_ostream &OS) const {
+ DIArray A = getTypeArray();
+ OS << " [" << A.getNumElements() << " elements]";
+}
+
+/// print - Print subprogram.
+void DISubprogram::print(raw_ostream &OS) const {
+ StringRef Res = getName();
+ if (!Res.empty())
+ OS << " [" << Res << "] ";
+
+ unsigned Tag = getTag();
+ OS << " [" << dwarf::TagString(Tag) << "] ";
+
+ // TODO : Print context
+ getCompileUnit().print(OS);
+ OS << " [" << getLineNumber() << "] ";
+
+ if (isLocalToUnit())
+ OS << " [local] ";
+
+ if (isDefinition())
+ OS << " [def] ";
+
+ OS << "\n";
+}
+
+/// print - Print global variable.
+void DIGlobalVariable::print(raw_ostream &OS) const {
+ OS << " [";
+ StringRef Res = getName();
+ if (!Res.empty())
+ OS << " [" << Res << "] ";
+
+ unsigned Tag = getTag();
+ OS << " [" << dwarf::TagString(Tag) << "] ";
+
+ // TODO : Print context
+ getCompileUnit().print(OS);
+ OS << " [" << getLineNumber() << "] ";
+
+ if (isLocalToUnit())
+ OS << " [local] ";
+
+ if (isDefinition())
+ OS << " [def] ";
+
+ if (isGlobalVariable())
+ DIGlobalVariable(DbgNode).print(OS);
+ OS << "]\n";
+}
+
+/// print - Print variable.
+void DIVariable::print(raw_ostream &OS) const {
+ StringRef Res = getName();
+ if (!Res.empty())
+ OS << " [" << Res << "] ";
+
+ getCompileUnit().print(OS);
+ OS << " [" << getLineNumber() << "] ";
+ getType().print(OS);
+ OS << "\n";
+
+ // FIXME: Dump complex addresses
+}
+
+/// dump - Print descriptor to dbgs() with a newline.
+void DIDescriptor::dump() const {
+ print(dbgs()); dbgs() << '\n';
+}
+
+/// dump - Print compile unit to dbgs() with a newline.
+void DICompileUnit::dump() const {
+ print(dbgs()); dbgs() << '\n';
+}
+
+/// dump - Print type to dbgs() with a newline.
+void DIType::dump() const {
+ print(dbgs()); dbgs() << '\n';
+}
+
+/// dump - Print basic type to dbgs() with a newline.
+void DIBasicType::dump() const {
+ print(dbgs()); dbgs() << '\n';
+}
+
+/// dump - Print derived type to dbgs() with a newline.
+void DIDerivedType::dump() const {
+ print(dbgs()); dbgs() << '\n';
+}
+
+/// dump - Print composite type to dbgs() with a newline.
+void DICompositeType::dump() const {
+ print(dbgs()); dbgs() << '\n';
+}
+
+/// dump - Print subprogram to dbgs() with a newline.
+void DISubprogram::dump() const {
+ print(dbgs()); dbgs() << '\n';
+}
+
+/// dump - Print global variable.
+void DIGlobalVariable::dump() const {
+ print(dbgs()); dbgs() << '\n';
+}
+
+/// dump - Print variable.
+void DIVariable::dump() const {
+ print(dbgs()); dbgs() << '\n';
+}
+
+//===----------------------------------------------------------------------===//
+// DIFactory: Basic Helpers
+//===----------------------------------------------------------------------===//
+
+DIFactory::DIFactory(Module &m)
+ : M(m), VMContext(M.getContext()), DeclareFn(0), ValueFn(0) {}
+
+Constant *DIFactory::GetTagConstant(unsigned TAG) {
+ assert((TAG & LLVMDebugVersionMask) == 0 &&
+ "Tag too large for debug encoding!");
+ return ConstantInt::get(Type::getInt32Ty(VMContext), TAG | LLVMDebugVersion);
+}
+
+//===----------------------------------------------------------------------===//
+// DIFactory: Primary Constructors
+//===----------------------------------------------------------------------===//
+
+/// GetOrCreateArray - Create an descriptor for an array of descriptors.
+/// This implicitly uniques the arrays created.
+DIArray DIFactory::GetOrCreateArray(DIDescriptor *Tys, unsigned NumTys) {
+ SmallVector<Value*, 16> Elts;
+
+ if (NumTys == 0)
+ Elts.push_back(llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)));
+ else
+ for (unsigned i = 0; i != NumTys; ++i)
+ Elts.push_back(Tys[i]);
+
+ return DIArray(MDNode::get(VMContext,Elts.data(), Elts.size()));
+}
+
+/// GetOrCreateSubrange - Create a descriptor for a value range. This
+/// implicitly uniques the values returned.
+DISubrange DIFactory::GetOrCreateSubrange(int64_t Lo, int64_t Hi) {
+ Value *Elts[] = {
+ GetTagConstant(dwarf::DW_TAG_subrange_type),
+ ConstantInt::get(Type::getInt64Ty(VMContext), Lo),
+ ConstantInt::get(Type::getInt64Ty(VMContext), Hi)
+ };
+
+ return DISubrange(MDNode::get(VMContext, &Elts[0], 3));
+}
+
+
+
+/// CreateCompileUnit - Create a new descriptor for the specified compile
+/// unit. Note that this does not unique compile units within the module.
+DICompileUnit DIFactory::CreateCompileUnit(unsigned LangID,
+ StringRef Filename,
+ StringRef Directory,
+ StringRef Producer,
+ bool isMain,
+ bool isOptimized,
+ StringRef Flags,
+ unsigned RunTimeVer) {
+ Value *Elts[] = {
+ GetTagConstant(dwarf::DW_TAG_compile_unit),
+ llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
+ ConstantInt::get(Type::getInt32Ty(VMContext), LangID),
+ MDString::get(VMContext, Filename),
+ MDString::get(VMContext, Directory),
+ MDString::get(VMContext, Producer),
+ ConstantInt::get(Type::getInt1Ty(VMContext), isMain),
+ ConstantInt::get(Type::getInt1Ty(VMContext), isOptimized),
+ MDString::get(VMContext, Flags),
+ ConstantInt::get(Type::getInt32Ty(VMContext), RunTimeVer)
+ };
+
+ return DICompileUnit(MDNode::get(VMContext, &Elts[0], 10));
+}
+
+/// CreateFile - Create a new descriptor for the specified file.
+DIFile DIFactory::CreateFile(StringRef Filename,
+ StringRef Directory,
+ DICompileUnit CU) {
+ Value *Elts[] = {
+ GetTagConstant(dwarf::DW_TAG_file_type),
+ MDString::get(VMContext, Filename),
+ MDString::get(VMContext, Directory),
+ CU
+ };
+
+ return DIFile(MDNode::get(VMContext, &Elts[0], 4));
+}
+
+/// CreateEnumerator - Create a single enumerator value.
+DIEnumerator DIFactory::CreateEnumerator(StringRef Name, uint64_t Val){
+ Value *Elts[] = {
+ GetTagConstant(dwarf::DW_TAG_enumerator),
+ MDString::get(VMContext, Name),
+ ConstantInt::get(Type::getInt64Ty(VMContext), Val)
+ };
+ return DIEnumerator(MDNode::get(VMContext, &Elts[0], 3));
+}
+
+
+/// CreateBasicType - Create a basic type like int, float, etc.
+DIBasicType DIFactory::CreateBasicType(DIDescriptor Context,
+ StringRef Name,
+ DIFile F,
+ unsigned LineNumber,
+ uint64_t SizeInBits,
+ uint64_t AlignInBits,
+ uint64_t OffsetInBits, unsigned Flags,
+ unsigned Encoding) {
+ Value *Elts[] = {
+ GetTagConstant(dwarf::DW_TAG_base_type),
+ Context,
+ MDString::get(VMContext, Name),
+ F,
+ ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
+ ConstantInt::get(Type::getInt64Ty(VMContext), SizeInBits),
+ ConstantInt::get(Type::getInt64Ty(VMContext), AlignInBits),
+ ConstantInt::get(Type::getInt64Ty(VMContext), OffsetInBits),
+ ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
+ ConstantInt::get(Type::getInt32Ty(VMContext), Encoding)
+ };
+ return DIBasicType(MDNode::get(VMContext, &Elts[0], 10));
+}
+
+
+/// CreateBasicType - Create a basic type like int, float, etc.
+DIBasicType DIFactory::CreateBasicTypeEx(DIDescriptor Context,
+ StringRef Name,
+ DIFile F,
+ unsigned LineNumber,
+ Constant *SizeInBits,
+ Constant *AlignInBits,
+ Constant *OffsetInBits, unsigned Flags,
+ unsigned Encoding) {
+ Value *Elts[] = {
+ GetTagConstant(dwarf::DW_TAG_base_type),
+ Context,
+ MDString::get(VMContext, Name),
+ F,
+ ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
+ SizeInBits,
+ AlignInBits,
+ OffsetInBits,
+ ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
+ ConstantInt::get(Type::getInt32Ty(VMContext), Encoding)
+ };
+ return DIBasicType(MDNode::get(VMContext, &Elts[0], 10));
+}
+
+/// CreateArtificialType - Create a new DIType with "artificial" flag set.
+DIType DIFactory::CreateArtificialType(DIType Ty) {
+ if (Ty.isArtificial())
+ return Ty;
+
+ SmallVector<Value *, 9> Elts;
+ MDNode *N = Ty;
+ assert (N && "Unexpected input DIType!");
+ for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
+ if (Value *V = N->getOperand(i))
+ Elts.push_back(V);
+ else
+ Elts.push_back(Constant::getNullValue(Type::getInt32Ty(VMContext)));
+ }
+
+ unsigned CurFlags = Ty.getFlags();
+ CurFlags = CurFlags | DIType::FlagArtificial;
+
+ // Flags are stored at this slot.
+ Elts[8] = ConstantInt::get(Type::getInt32Ty(VMContext), CurFlags);
+
+ return DIType(MDNode::get(VMContext, Elts.data(), Elts.size()));
+}
+
+/// CreateDerivedType - Create a derived type like const qualified type,
+/// pointer, typedef, etc.
+DIDerivedType DIFactory::CreateDerivedType(unsigned Tag,
+ DIDescriptor Context,
+ StringRef Name,
+ DIFile F,
+ unsigned LineNumber,
+ uint64_t SizeInBits,
+ uint64_t AlignInBits,
+ uint64_t OffsetInBits,
+ unsigned Flags,
+ DIType DerivedFrom) {
+ Value *Elts[] = {
+ GetTagConstant(Tag),
+ Context,
+ MDString::get(VMContext, Name),
+ F,
+ ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
+ ConstantInt::get(Type::getInt64Ty(VMContext), SizeInBits),
+ ConstantInt::get(Type::getInt64Ty(VMContext), AlignInBits),
+ ConstantInt::get(Type::getInt64Ty(VMContext), OffsetInBits),
+ ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
+ DerivedFrom,
+ };
+ return DIDerivedType(MDNode::get(VMContext, &Elts[0], 10));
+}
+
+
+/// CreateDerivedType - Create a derived type like const qualified type,
+/// pointer, typedef, etc.
+DIDerivedType DIFactory::CreateDerivedTypeEx(unsigned Tag,
+ DIDescriptor Context,
+ StringRef Name,
+ DIFile F,
+ unsigned LineNumber,
+ Constant *SizeInBits,
+ Constant *AlignInBits,
+ Constant *OffsetInBits,
+ unsigned Flags,
+ DIType DerivedFrom) {
+ Value *Elts[] = {
+ GetTagConstant(Tag),
+ Context,
+ MDString::get(VMContext, Name),
+ F,
+ ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
+ SizeInBits,
+ AlignInBits,
+ OffsetInBits,
+ ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
+ DerivedFrom,
+ };
+ return DIDerivedType(MDNode::get(VMContext, &Elts[0], 10));
+}
+
+
+/// CreateCompositeType - Create a composite type like array, struct, etc.
+DICompositeType DIFactory::CreateCompositeType(unsigned Tag,
+ DIDescriptor Context,
+ StringRef Name,
+ DIFile F,
+ unsigned LineNumber,
+ uint64_t SizeInBits,
+ uint64_t AlignInBits,
+ uint64_t OffsetInBits,
+ unsigned Flags,
+ DIType DerivedFrom,
+ DIArray Elements,
+ unsigned RuntimeLang,
+ MDNode *ContainingType) {
+
+ Value *Elts[] = {
+ GetTagConstant(Tag),
+ Context,
+ MDString::get(VMContext, Name),
+ F,
+ ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
+ ConstantInt::get(Type::getInt64Ty(VMContext), SizeInBits),
+ ConstantInt::get(Type::getInt64Ty(VMContext), AlignInBits),
+ ConstantInt::get(Type::getInt64Ty(VMContext), OffsetInBits),
+ ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
+ DerivedFrom,
+ Elements,
+ ConstantInt::get(Type::getInt32Ty(VMContext), RuntimeLang),
+ ContainingType
+ };
+ return DICompositeType(MDNode::get(VMContext, &Elts[0], 13));
+}
+
+
+/// CreateCompositeType - Create a composite type like array, struct, etc.
+DICompositeType DIFactory::CreateCompositeTypeEx(unsigned Tag,
+ DIDescriptor Context,
+ StringRef Name,
+ DIFile F,
+ unsigned LineNumber,
+ Constant *SizeInBits,
+ Constant *AlignInBits,
+ Constant *OffsetInBits,
+ unsigned Flags,
+ DIType DerivedFrom,
+ DIArray Elements,
+ unsigned RuntimeLang) {
+
+ Value *Elts[] = {
+ GetTagConstant(Tag),
+ Context,
+ MDString::get(VMContext, Name),
+ F,
+ ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
+ SizeInBits,
+ AlignInBits,
+ OffsetInBits,
+ ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
+ DerivedFrom,
+ Elements,
+ ConstantInt::get(Type::getInt32Ty(VMContext), RuntimeLang)
+ };
+ return DICompositeType(MDNode::get(VMContext, &Elts[0], 12));
+}
+
+
+/// CreateSubprogram - Create a new descriptor for the specified subprogram.
+/// See comments in DISubprogram for descriptions of these fields. This
+/// method does not unique the generated descriptors.
+DISubprogram DIFactory::CreateSubprogram(DIDescriptor Context,
+ StringRef Name,
+ StringRef DisplayName,
+ StringRef LinkageName,
+ DIFile F,
+ unsigned LineNo, DIType Ty,
+ bool isLocalToUnit,
+ bool isDefinition,
+ unsigned VK, unsigned VIndex,
+ DIType ContainingType,
+ bool isArtificial,
+ bool isOptimized,
+ Function *Fn) {
+
+ Value *Elts[] = {
+ GetTagConstant(dwarf::DW_TAG_subprogram),
+ llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
+ Context,
+ MDString::get(VMContext, Name),
+ MDString::get(VMContext, DisplayName),
+ MDString::get(VMContext, LinkageName),
+ F,
+ ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
+ Ty,
+ ConstantInt::get(Type::getInt1Ty(VMContext), isLocalToUnit),
+ ConstantInt::get(Type::getInt1Ty(VMContext), isDefinition),
+ ConstantInt::get(Type::getInt32Ty(VMContext), (unsigned)VK),
+ ConstantInt::get(Type::getInt32Ty(VMContext), VIndex),
+ ContainingType,
+ ConstantInt::get(Type::getInt1Ty(VMContext), isArtificial),
+ ConstantInt::get(Type::getInt1Ty(VMContext), isOptimized),
+ Fn
+ };
+ MDNode *Node = MDNode::get(VMContext, &Elts[0], 17);
+
+ // Create a named metadata so that we do not lose this mdnode.
+ NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.sp");
+ NMD->addOperand(Node);
+ return DISubprogram(Node);
+}
+
+/// CreateSubprogramDefinition - Create new subprogram descriptor for the
+/// given declaration.
+DISubprogram DIFactory::CreateSubprogramDefinition(DISubprogram &SPDeclaration) {
+ if (SPDeclaration.isDefinition())
+ return DISubprogram(SPDeclaration);
+
+ MDNode *DeclNode = SPDeclaration;
+ Value *Elts[] = {
+ GetTagConstant(dwarf::DW_TAG_subprogram),
+ llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
+ DeclNode->getOperand(2), // Context
+ DeclNode->getOperand(3), // Name
+ DeclNode->getOperand(4), // DisplayName
+ DeclNode->getOperand(5), // LinkageName
+ DeclNode->getOperand(6), // CompileUnit
+ DeclNode->getOperand(7), // LineNo
+ DeclNode->getOperand(8), // Type
+ DeclNode->getOperand(9), // isLocalToUnit
+ ConstantInt::get(Type::getInt1Ty(VMContext), true),
+ DeclNode->getOperand(11), // Virtuality
+ DeclNode->getOperand(12), // VIndex
+ DeclNode->getOperand(13), // Containting Type
+ DeclNode->getOperand(14), // isArtificial
+ DeclNode->getOperand(15), // isOptimized
+ SPDeclaration.getFunction()
+ };
+ MDNode *Node =MDNode::get(VMContext, &Elts[0], 16);
+
+ // Create a named metadata so that we do not lose this mdnode.
+ NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.sp");
+ NMD->addOperand(Node);
+ return DISubprogram(Node);
+}
+
+/// CreateGlobalVariable - Create a new descriptor for the specified global.
+DIGlobalVariable
+DIFactory::CreateGlobalVariable(DIDescriptor Context, StringRef Name,
+ StringRef DisplayName,
+ StringRef LinkageName,
+ DIFile F,
+ unsigned LineNo, DIType Ty,bool isLocalToUnit,
+ bool isDefinition, llvm::GlobalVariable *Val) {
+ Value *Elts[] = {
+ GetTagConstant(dwarf::DW_TAG_variable),
+ llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
+ Context,
+ MDString::get(VMContext, Name),
+ MDString::get(VMContext, DisplayName),
+ MDString::get(VMContext, LinkageName),
+ F,
+ ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
+ Ty,
+ ConstantInt::get(Type::getInt1Ty(VMContext), isLocalToUnit),
+ ConstantInt::get(Type::getInt1Ty(VMContext), isDefinition),
+ Val
+ };
+
+ Value *const *Vs = &Elts[0];
+ MDNode *Node = MDNode::get(VMContext,Vs, 12);
+
+ // Create a named metadata so that we do not lose this mdnode.
+ NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.gv");
+ NMD->addOperand(Node);
+
+ return DIGlobalVariable(Node);
+}
+
+
+/// CreateVariable - Create a new descriptor for the specified variable.
+DIVariable DIFactory::CreateVariable(unsigned Tag, DIDescriptor Context,
+ StringRef Name,
+ DIFile F,
+ unsigned LineNo,
+ DIType Ty, bool AlwaysPreserve) {
+ Value *Elts[] = {
+ GetTagConstant(Tag),
+ Context,
+ MDString::get(VMContext, Name),
+ F,
+ ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
+ Ty,
+ };
+ MDNode *Node = MDNode::get(VMContext, &Elts[0], 6);
+ if (AlwaysPreserve) {
+ // The optimizer may remove local variable. If there is an interest
+ // to preserve variable info in such situation then stash it in a
+ // named mdnode.
+ DISubprogram Fn(getDISubprogram(Context));
+ StringRef FName = "fn";
+ if (Fn.getFunction())
+ FName = Fn.getFunction()->getName();
+ char One = '\1';
+ if (FName.startswith(StringRef(&One, 1)))
+ FName = FName.substr(1);
+ NamedMDNode *FnLocals = M.getNamedMetadata(Twine("llvm.dbg.lv.", FName));
+ if (!FnLocals)
+ FnLocals = NamedMDNode::Create(VMContext, Twine("llvm.dbg.lv.", FName),
+ NULL, 0, &M);
+ FnLocals->addOperand(Node);
+ }
+ return DIVariable(Node);
+}
+
+
+/// CreateComplexVariable - Create a new descriptor for the specified variable
+/// which has a complex address expression for its address.
+DIVariable DIFactory::CreateComplexVariable(unsigned Tag, DIDescriptor Context,
+ const std::string &Name,
+ DIFile F,
+ unsigned LineNo,
+ DIType Ty,
+ SmallVector<Value *, 9> &addr) {
+ SmallVector<Value *, 9> Elts;
+ Elts.push_back(GetTagConstant(Tag));
+ Elts.push_back(Context);
+ Elts.push_back(MDString::get(VMContext, Name));
+ Elts.push_back(F);
+ Elts.push_back(ConstantInt::get(Type::getInt32Ty(VMContext), LineNo));
+ Elts.push_back(Ty);
+ Elts.insert(Elts.end(), addr.begin(), addr.end());
+
+ return DIVariable(MDNode::get(VMContext, &Elts[0], 6+addr.size()));
+}
+
+
+/// CreateBlock - This creates a descriptor for a lexical block with the
+/// specified parent VMContext.
+DILexicalBlock DIFactory::CreateLexicalBlock(DIDescriptor Context,
+ unsigned LineNo, unsigned Col) {
+ Value *Elts[] = {
+ GetTagConstant(dwarf::DW_TAG_lexical_block),
+ Context,
+ ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
+ ConstantInt::get(Type::getInt32Ty(VMContext), Col)
+ };
+ return DILexicalBlock(MDNode::get(VMContext, &Elts[0], 4));
+}
+
+/// CreateNameSpace - This creates new descriptor for a namespace
+/// with the specified parent context.
+DINameSpace DIFactory::CreateNameSpace(DIDescriptor Context, StringRef Name,
+ DIFile F,
+ unsigned LineNo) {
+ Value *Elts[] = {
+ GetTagConstant(dwarf::DW_TAG_namespace),
+ Context,
+ MDString::get(VMContext, Name),
+ F,
+ ConstantInt::get(Type::getInt32Ty(VMContext), LineNo)
+ };
+ return DINameSpace(MDNode::get(VMContext, &Elts[0], 5));
+}
+
+/// CreateLocation - Creates a debug info location.
+DILocation DIFactory::CreateLocation(unsigned LineNo, unsigned ColumnNo,
+ DIScope S, DILocation OrigLoc) {
+ Value *Elts[] = {
+ ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
+ ConstantInt::get(Type::getInt32Ty(VMContext), ColumnNo),
+ S,
+ OrigLoc,
+ };
+ return DILocation(MDNode::get(VMContext, &Elts[0], 4));
+}
+
+//===----------------------------------------------------------------------===//
+// DIFactory: Routines for inserting code into a function
+//===----------------------------------------------------------------------===//
+
+/// InsertDeclare - Insert a new llvm.dbg.declare intrinsic call.
+Instruction *DIFactory::InsertDeclare(Value *Storage, DIVariable D,
+ Instruction *InsertBefore) {
+ assert(Storage && "no storage passed to dbg.declare");
+ assert(D.Verify() && "empty DIVariable passed to dbg.declare");
+ if (!DeclareFn)
+ DeclareFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_declare);
+
+ Value *Args[] = { MDNode::get(Storage->getContext(), &Storage, 1),
+ D };
+ return CallInst::Create(DeclareFn, Args, Args+2, "", InsertBefore);
+}
+
+/// InsertDeclare - Insert a new llvm.dbg.declare intrinsic call.
+Instruction *DIFactory::InsertDeclare(Value *Storage, DIVariable D,
+ BasicBlock *InsertAtEnd) {
+ assert(Storage && "no storage passed to dbg.declare");
+ assert(D.Verify() && "invalid DIVariable passed to dbg.declare");
+ if (!DeclareFn)
+ DeclareFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_declare);
+
+ Value *Args[] = { MDNode::get(Storage->getContext(), &Storage, 1),
+ D };
+
+ // If this block already has a terminator then insert this intrinsic
+ // before the terminator.
+ if (TerminatorInst *T = InsertAtEnd->getTerminator())
+ return CallInst::Create(DeclareFn, Args, Args+2, "", T);
+ else
+ return CallInst::Create(DeclareFn, Args, Args+2, "", InsertAtEnd);}
+
+/// InsertDbgValueIntrinsic - Insert a new llvm.dbg.value intrinsic call.
+Instruction *DIFactory::InsertDbgValueIntrinsic(Value *V, uint64_t Offset,
+ DIVariable D,
+ Instruction *InsertBefore) {
+ assert(V && "no value passed to dbg.value");
+ assert(D.Verify() && "invalid DIVariable passed to dbg.value");
+ if (!ValueFn)
+ ValueFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_value);
+
+ Value *Args[] = { MDNode::get(V->getContext(), &V, 1),
+ ConstantInt::get(Type::getInt64Ty(V->getContext()), Offset),
+ D };
+ return CallInst::Create(ValueFn, Args, Args+3, "", InsertBefore);
+}
+
+/// InsertDbgValueIntrinsic - Insert a new llvm.dbg.value intrinsic call.
+Instruction *DIFactory::InsertDbgValueIntrinsic(Value *V, uint64_t Offset,
+ DIVariable D,
+ BasicBlock *InsertAtEnd) {
+ assert(V && "no value passed to dbg.value");
+ assert(D.Verify() && "invalid DIVariable passed to dbg.value");
+ if (!ValueFn)
+ ValueFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_value);
+
+ Value *Args[] = { MDNode::get(V->getContext(), &V, 1),
+ ConstantInt::get(Type::getInt64Ty(V->getContext()), Offset),
+ D };
+ return CallInst::Create(ValueFn, Args, Args+3, "", InsertAtEnd);
+}
+
+//===----------------------------------------------------------------------===//
+// DebugInfoFinder implementations.
+//===----------------------------------------------------------------------===//
+
+/// processModule - Process entire module and collect debug info.
+void DebugInfoFinder::processModule(Module &M) {
+ for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
+ for (Function::iterator FI = (*I).begin(), FE = (*I).end(); FI != FE; ++FI)
+ for (BasicBlock::iterator BI = (*FI).begin(), BE = (*FI).end(); BI != BE;
+ ++BI) {
+ if (DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(BI))
+ processDeclare(DDI);
+
+ DebugLoc Loc = BI->getDebugLoc();
+ if (Loc.isUnknown())
+ continue;
+
+ LLVMContext &Ctx = BI->getContext();
+ DIDescriptor Scope(Loc.getScope(Ctx));
+
+ if (Scope.isCompileUnit())
+ addCompileUnit(DICompileUnit(Scope));
+ else if (Scope.isSubprogram())
+ processSubprogram(DISubprogram(Scope));
+ else if (Scope.isLexicalBlock())
+ processLexicalBlock(DILexicalBlock(Scope));
+
+ if (MDNode *IA = Loc.getInlinedAt(Ctx))
+ processLocation(DILocation(IA));
+ }
+
+ if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.gv")) {
+ for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
+ DIGlobalVariable DIG(cast<MDNode>(NMD->getOperand(i)));
+ if (addGlobalVariable(DIG)) {
+ addCompileUnit(DIG.getCompileUnit());
+ processType(DIG.getType());
+ }
+ }
+ }
+
+ if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp"))
+ for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i)
+ processSubprogram(DISubprogram(NMD->getOperand(i)));
+}
+
+/// processLocation - Process DILocation.
+void DebugInfoFinder::processLocation(DILocation Loc) {
+ if (!Loc.Verify()) return;
+ DIDescriptor S(Loc.getScope());
+ if (S.isCompileUnit())
+ addCompileUnit(DICompileUnit(S));
+ else if (S.isSubprogram())
+ processSubprogram(DISubprogram(S));
+ else if (S.isLexicalBlock())
+ processLexicalBlock(DILexicalBlock(S));
+ processLocation(Loc.getOrigLocation());
+}
+
+/// processType - Process DIType.
+void DebugInfoFinder::processType(DIType DT) {
+ if (!addType(DT))
+ return;
+
+ addCompileUnit(DT.getCompileUnit());
+ if (DT.isCompositeType()) {
+ DICompositeType DCT(DT);
+ processType(DCT.getTypeDerivedFrom());
+ DIArray DA = DCT.getTypeArray();
+ for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
+ DIDescriptor D = DA.getElement(i);
+ if (D.isType())
+ processType(DIType(D));
+ else if (D.isSubprogram())
+ processSubprogram(DISubprogram(D));
+ }
+ } else if (DT.isDerivedType()) {
+ DIDerivedType DDT(DT);
+ processType(DDT.getTypeDerivedFrom());
+ }
+}
+
+/// processLexicalBlock
+void DebugInfoFinder::processLexicalBlock(DILexicalBlock LB) {
+ DIScope Context = LB.getContext();
+ if (Context.isLexicalBlock())
+ return processLexicalBlock(DILexicalBlock(Context));
+ else
+ return processSubprogram(DISubprogram(Context));
+}
+
+/// processSubprogram - Process DISubprogram.
+void DebugInfoFinder::processSubprogram(DISubprogram SP) {
+ if (!addSubprogram(SP))
+ return;
+ addCompileUnit(SP.getCompileUnit());
+ processType(SP.getType());
+}
+
+/// processDeclare - Process DbgDeclareInst.
+void DebugInfoFinder::processDeclare(DbgDeclareInst *DDI) {
+ MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
+ if (!N) return;
+
+ DIDescriptor DV(N);
+ if (!DV.isVariable())
+ return;
+
+ if (!NodesSeen.insert(DV))
+ return;
+
+ addCompileUnit(DIVariable(N).getCompileUnit());
+ processType(DIVariable(N).getType());
+}
+
+/// addType - Add type into Tys.
+bool DebugInfoFinder::addType(DIType DT) {
+ if (!DT.isValid())
+ return false;
+
+ if (!NodesSeen.insert(DT))
+ return false;
+
+ TYs.push_back(DT);
+ return true;
+}
+
+/// addCompileUnit - Add compile unit into CUs.
+bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
+ if (!CU.Verify())
+ return false;
+
+ if (!NodesSeen.insert(CU))
+ return false;
+
+ CUs.push_back(CU);
+ return true;
+}
+
+/// addGlobalVariable - Add global variable into GVs.
+bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
+ if (!DIDescriptor(DIG).isGlobalVariable())
+ return false;
+
+ if (!NodesSeen.insert(DIG))
+ return false;
+
+ GVs.push_back(DIG);
+ return true;
+}
+
+// addSubprogram - Add subprgoram into SPs.
+bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
+ if (!DIDescriptor(SP).isSubprogram())
+ return false;
+
+ if (!NodesSeen.insert(SP))
+ return false;
+
+ SPs.push_back(SP);
+ return true;
+}
+
+/// Find the debug info descriptor corresponding to this global variable.
+static Value *findDbgGlobalDeclare(GlobalVariable *V) {
+ const Module *M = V->getParent();
+ NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.gv");
+ if (!NMD)
+ return 0;
+
+ for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
+ DIDescriptor DIG(cast_or_null<MDNode>(NMD->getOperand(i)));
+ if (!DIG.isGlobalVariable())
+ continue;
+ if (DIGlobalVariable(DIG).getGlobal() == V)
+ return DIG;
+ }
+ return 0;
+}
+
+/// Finds the llvm.dbg.declare intrinsic corresponding to this value if any.
+/// It looks through pointer casts too.
+static const DbgDeclareInst *findDbgDeclare(const Value *V) {
+ V = V->stripPointerCasts();
+
+ if (!isa<Instruction>(V) && !isa<Argument>(V))
+ return 0;
+
+ const Function *F = NULL;
+ if (const Instruction *I = dyn_cast<Instruction>(V))
+ F = I->getParent()->getParent();
+ else if (const Argument *A = dyn_cast<Argument>(V))
+ F = A->getParent();
+
+ for (Function::const_iterator FI = F->begin(), FE = F->end(); FI != FE; ++FI)
+ for (BasicBlock::const_iterator BI = (*FI).begin(), BE = (*FI).end();
+ BI != BE; ++BI)
+ if (const DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(BI))
+ if (DDI->getAddress() == V)
+ return DDI;
+
+ return 0;
+}
+
+bool llvm::getLocationInfo(const Value *V, std::string &DisplayName,
+ std::string &Type, unsigned &LineNo,
+ std::string &File, std::string &Dir) {
+ DICompileUnit Unit;
+ DIType TypeD;
+
+ if (GlobalVariable *GV = dyn_cast<GlobalVariable>(const_cast<Value*>(V))) {
+ Value *DIGV = findDbgGlobalDeclare(GV);
+ if (!DIGV) return false;
+ DIGlobalVariable Var(cast<MDNode>(DIGV));
+
+ StringRef D = Var.getDisplayName();
+ if (!D.empty())
+ DisplayName = D;
+ LineNo = Var.getLineNumber();
+ Unit = Var.getCompileUnit();
+ TypeD = Var.getType();
+ } else {
+ const DbgDeclareInst *DDI = findDbgDeclare(V);
+ if (!DDI) return false;
+ DIVariable Var(cast<MDNode>(DDI->getVariable()));
+
+ StringRef D = Var.getName();
+ if (!D.empty())
+ DisplayName = D;
+ LineNo = Var.getLineNumber();
+ Unit = Var.getCompileUnit();
+ TypeD = Var.getType();
+ }
+
+ StringRef T = TypeD.getName();
+ if (!T.empty())
+ Type = T;
+ StringRef F = Unit.getFilename();
+ if (!F.empty())
+ File = F;
+ StringRef D = Unit.getDirectory();
+ if (!D.empty())
+ Dir = D;
+ return true;
+}
+
+/// getDISubprogram - Find subprogram that is enclosing this scope.
+DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
+ DIDescriptor D(Scope);
+ if (D.isSubprogram())
+ return DISubprogram(Scope);
+
+ if (D.isLexicalBlock())
+ return getDISubprogram(DILexicalBlock(Scope).getContext());
+
+ return DISubprogram();
+}
+
+/// getDICompositeType - Find underlying composite type.
+DICompositeType llvm::getDICompositeType(DIType T) {
+ if (T.isCompositeType())
+ return DICompositeType(T);
+
+ if (T.isDerivedType())
+ return getDICompositeType(DIDerivedType(T).getTypeDerivedFrom());
+
+ return DICompositeType();
+}
OpenPOWER on IntegriCloud