1 //===--- DebugInfo.cpp - Debug Information Helper Classes -----------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the helper classes used to build and interpret debug
11 // information in LLVM IR form.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/Analysis/DebugInfo.h"
16 #include "llvm/Constants.h"
17 #include "llvm/DerivedTypes.h"
18 #include "llvm/Intrinsics.h"
19 #include "llvm/IntrinsicInst.h"
20 #include "llvm/Instructions.h"
21 #include "llvm/Module.h"
22 #include "llvm/Analysis/ValueTracking.h"
23 #include "llvm/ADT/SmallPtrSet.h"
24 #include "llvm/ADT/SmallString.h"
25 #include "llvm/ADT/STLExtras.h"
26 #include "llvm/Support/Debug.h"
27 #include "llvm/Support/Dwarf.h"
28 #include "llvm/Support/raw_ostream.h"
30 using namespace llvm::dwarf;
32 //===----------------------------------------------------------------------===//
34 //===----------------------------------------------------------------------===//
36 DIDescriptor::DIDescriptor(const DIFile F) : DbgNode(F.DbgNode) {
39 DIDescriptor::DIDescriptor(const DISubprogram F) : DbgNode(F.DbgNode) {
42 DIDescriptor::DIDescriptor(const DILexicalBlock F) : DbgNode(F.DbgNode) {
45 DIDescriptor::DIDescriptor(const DIVariable F) : DbgNode(F.DbgNode) {
48 DIDescriptor::DIDescriptor(const DIType F) : DbgNode(F.DbgNode) {
52 DIDescriptor::getStringField(unsigned Elt) const {
56 if (Elt < DbgNode->getNumOperands())
57 if (MDString *MDS = dyn_cast_or_null<MDString>(DbgNode->getOperand(Elt)))
58 return MDS->getString();
63 uint64_t DIDescriptor::getUInt64Field(unsigned Elt) const {
67 if (Elt < DbgNode->getNumOperands())
68 if (ConstantInt *CI = dyn_cast<ConstantInt>(DbgNode->getOperand(Elt)))
69 return CI->getZExtValue();
74 DIDescriptor DIDescriptor::getDescriptorField(unsigned Elt) const {
76 return DIDescriptor();
78 if (Elt < DbgNode->getNumOperands())
80 DIDescriptor(dyn_cast_or_null<const MDNode>(DbgNode->getOperand(Elt)));
81 return DIDescriptor();
84 GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
88 if (Elt < DbgNode->getNumOperands())
89 return dyn_cast_or_null<GlobalVariable>(DbgNode->getOperand(Elt));
93 Constant *DIDescriptor::getConstantField(unsigned Elt) const {
97 if (Elt < DbgNode->getNumOperands())
98 return dyn_cast_or_null<Constant>(DbgNode->getOperand(Elt));
102 Function *DIDescriptor::getFunctionField(unsigned Elt) const {
106 if (Elt < DbgNode->getNumOperands())
107 return dyn_cast_or_null<Function>(DbgNode->getOperand(Elt));
111 unsigned DIVariable::getNumAddrElements() const {
112 return DbgNode->getNumOperands()-6;
116 //===----------------------------------------------------------------------===//
118 //===----------------------------------------------------------------------===//
120 /// isBasicType - Return true if the specified tag is legal for
122 bool DIDescriptor::isBasicType() const {
123 return DbgNode && getTag() == dwarf::DW_TAG_base_type;
126 /// isDerivedType - Return true if the specified tag is legal for DIDerivedType.
127 bool DIDescriptor::isDerivedType() const {
128 if (!DbgNode) return false;
130 case dwarf::DW_TAG_typedef:
131 case dwarf::DW_TAG_pointer_type:
132 case dwarf::DW_TAG_reference_type:
133 case dwarf::DW_TAG_const_type:
134 case dwarf::DW_TAG_volatile_type:
135 case dwarf::DW_TAG_restrict_type:
136 case dwarf::DW_TAG_member:
137 case dwarf::DW_TAG_inheritance:
138 case dwarf::DW_TAG_friend:
141 // CompositeTypes are currently modelled as DerivedTypes.
142 return isCompositeType();
146 /// isCompositeType - Return true if the specified tag is legal for
148 bool DIDescriptor::isCompositeType() const {
149 if (!DbgNode) return false;
151 case dwarf::DW_TAG_array_type:
152 case dwarf::DW_TAG_structure_type:
153 case dwarf::DW_TAG_union_type:
154 case dwarf::DW_TAG_enumeration_type:
155 case dwarf::DW_TAG_vector_type:
156 case dwarf::DW_TAG_subroutine_type:
157 case dwarf::DW_TAG_class_type:
164 /// isVariable - Return true if the specified tag is legal for DIVariable.
165 bool DIDescriptor::isVariable() const {
166 if (!DbgNode) return false;
168 case dwarf::DW_TAG_auto_variable:
169 case dwarf::DW_TAG_arg_variable:
170 case dwarf::DW_TAG_return_variable:
177 /// isType - Return true if the specified tag is legal for DIType.
178 bool DIDescriptor::isType() const {
179 return isBasicType() || isCompositeType() || isDerivedType();
182 /// isSubprogram - Return true if the specified tag is legal for
184 bool DIDescriptor::isSubprogram() const {
185 return DbgNode && getTag() == dwarf::DW_TAG_subprogram;
188 /// isGlobalVariable - Return true if the specified tag is legal for
189 /// DIGlobalVariable.
190 bool DIDescriptor::isGlobalVariable() const {
191 return DbgNode && (getTag() == dwarf::DW_TAG_variable ||
192 getTag() == dwarf::DW_TAG_constant);
195 /// isGlobal - Return true if the specified tag is legal for DIGlobal.
196 bool DIDescriptor::isGlobal() const {
197 return isGlobalVariable();
200 /// isScope - Return true if the specified tag is one of the scope
202 bool DIDescriptor::isScope() const {
203 if (!DbgNode) return false;
205 case dwarf::DW_TAG_compile_unit:
206 case dwarf::DW_TAG_lexical_block:
207 case dwarf::DW_TAG_subprogram:
208 case dwarf::DW_TAG_namespace:
216 /// isCompileUnit - Return true if the specified tag is DW_TAG_compile_unit.
217 bool DIDescriptor::isCompileUnit() const {
218 return DbgNode && getTag() == dwarf::DW_TAG_compile_unit;
221 /// isFile - Return true if the specified tag is DW_TAG_file_type.
222 bool DIDescriptor::isFile() const {
223 return DbgNode && getTag() == dwarf::DW_TAG_file_type;
226 /// isNameSpace - Return true if the specified tag is DW_TAG_namespace.
227 bool DIDescriptor::isNameSpace() const {
228 return DbgNode && getTag() == dwarf::DW_TAG_namespace;
231 /// isLexicalBlock - Return true if the specified tag is DW_TAG_lexical_block.
232 bool DIDescriptor::isLexicalBlock() const {
233 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block;
236 /// isSubrange - Return true if the specified tag is DW_TAG_subrange_type.
237 bool DIDescriptor::isSubrange() const {
238 return DbgNode && getTag() == dwarf::DW_TAG_subrange_type;
241 /// isEnumerator - Return true if the specified tag is DW_TAG_enumerator.
242 bool DIDescriptor::isEnumerator() const {
243 return DbgNode && getTag() == dwarf::DW_TAG_enumerator;
246 //===----------------------------------------------------------------------===//
247 // Simple Descriptor Constructors and other Methods
248 //===----------------------------------------------------------------------===//
250 DIType::DIType(const MDNode *N) : DIScope(N) {
252 if (!isBasicType() && !isDerivedType() && !isCompositeType()) {
257 unsigned DIArray::getNumElements() const {
260 return DbgNode->getNumOperands();
263 /// replaceAllUsesWith - Replace all uses of debug info referenced by
265 void DIType::replaceAllUsesWith(DIDescriptor &D) {
269 // Since we use a TrackingVH for the node, its easy for clients to manufacture
270 // legitimate situations where they want to replaceAllUsesWith() on something
271 // which, due to uniquing, has merged with the source. We shield clients from
272 // this detail by allowing a value to be replaced with replaceAllUsesWith()
275 MDNode *Node = const_cast<MDNode*>(DbgNode);
276 const MDNode *DN = D;
277 const Value *V = cast_or_null<Value>(DN);
278 Node->replaceAllUsesWith(const_cast<Value*>(V));
279 MDNode::deleteTemporary(Node);
283 /// Verify - Verify that a compile unit is well formed.
284 bool DICompileUnit::Verify() const {
287 StringRef N = getFilename();
290 // It is possible that directory and produce string is empty.
294 /// Verify - Verify that a type descriptor is well formed.
295 bool DIType::Verify() const {
298 if (!getContext().Verify())
301 DICompileUnit CU = getCompileUnit();
307 /// Verify - Verify that a basic type descriptor is well formed.
308 bool DIBasicType::Verify() const {
309 return isBasicType();
312 /// Verify - Verify that a derived type descriptor is well formed.
313 bool DIDerivedType::Verify() const {
314 return isDerivedType();
317 /// Verify - Verify that a composite type descriptor is well formed.
318 bool DICompositeType::Verify() const {
321 if (!getContext().Verify())
324 DICompileUnit CU = getCompileUnit();
330 /// Verify - Verify that a subprogram descriptor is well formed.
331 bool DISubprogram::Verify() const {
335 if (!getContext().Verify())
338 DICompileUnit CU = getCompileUnit();
342 DICompositeType Ty = getType();
348 /// Verify - Verify that a global variable descriptor is well formed.
349 bool DIGlobalVariable::Verify() const {
353 if (getDisplayName().empty())
356 if (!getContext().Verify())
359 DICompileUnit CU = getCompileUnit();
363 DIType Ty = getType();
367 if (!getGlobal() && !getConstant())
373 /// Verify - Verify that a variable descriptor is well formed.
374 bool DIVariable::Verify() const {
378 if (!getContext().Verify())
381 if (!getCompileUnit().Verify())
384 DIType Ty = getType();
391 /// Verify - Verify that a location descriptor is well formed.
392 bool DILocation::Verify() const {
396 return DbgNode->getNumOperands() == 4;
399 /// Verify - Verify that a namespace descriptor is well formed.
400 bool DINameSpace::Verify() const {
403 if (getName().empty())
405 if (!getCompileUnit().Verify())
410 /// getOriginalTypeSize - If this type is derived from a base type then
411 /// return base type size.
412 uint64_t DIDerivedType::getOriginalTypeSize() const {
413 unsigned Tag = getTag();
414 if (Tag == dwarf::DW_TAG_member || Tag == dwarf::DW_TAG_typedef ||
415 Tag == dwarf::DW_TAG_const_type || Tag == dwarf::DW_TAG_volatile_type ||
416 Tag == dwarf::DW_TAG_restrict_type) {
417 DIType BaseType = getTypeDerivedFrom();
418 // If this type is not derived from any type then take conservative
420 if (!BaseType.isValid())
421 return getSizeInBits();
422 if (BaseType.isDerivedType())
423 return DIDerivedType(BaseType).getOriginalTypeSize();
425 return BaseType.getSizeInBits();
428 return getSizeInBits();
431 /// isInlinedFnArgument - Return true if this variable provides debugging
432 /// information for an inlined function arguments.
433 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
434 assert(CurFn && "Invalid function");
435 if (!getContext().isSubprogram())
437 // This variable is not inlined function argument if its scope
438 // does not describe current function.
439 return !(DISubprogram(getContext()).describes(CurFn));
442 /// describes - Return true if this subprogram provides debugging
443 /// information for the function F.
444 bool DISubprogram::describes(const Function *F) {
445 assert(F && "Invalid function");
446 if (F == getFunction())
448 StringRef Name = getLinkageName();
451 if (F->getName() == Name)
456 unsigned DISubprogram::isOptimized() const {
457 assert (DbgNode && "Invalid subprogram descriptor!");
458 if (DbgNode->getNumOperands() == 16)
459 return getUnsignedField(15);
463 StringRef DIScope::getFilename() const {
466 if (isLexicalBlock())
467 return DILexicalBlock(DbgNode).getFilename();
469 return DISubprogram(DbgNode).getFilename();
471 return DICompileUnit(DbgNode).getFilename();
473 return DINameSpace(DbgNode).getFilename();
475 return DIType(DbgNode).getFilename();
477 return DIFile(DbgNode).getFilename();
478 assert(0 && "Invalid DIScope!");
482 StringRef DIScope::getDirectory() const {
485 if (isLexicalBlock())
486 return DILexicalBlock(DbgNode).getDirectory();
488 return DISubprogram(DbgNode).getDirectory();
490 return DICompileUnit(DbgNode).getDirectory();
492 return DINameSpace(DbgNode).getDirectory();
494 return DIType(DbgNode).getDirectory();
496 return DIFile(DbgNode).getDirectory();
497 assert(0 && "Invalid DIScope!");
501 //===----------------------------------------------------------------------===//
502 // DIDescriptor: dump routines for all descriptors.
503 //===----------------------------------------------------------------------===//
506 /// print - Print descriptor.
507 void DIDescriptor::print(raw_ostream &OS) const {
508 OS << "[" << dwarf::TagString(getTag()) << "] ";
509 OS.write_hex((intptr_t) &*DbgNode) << ']';
512 /// print - Print compile unit.
513 void DICompileUnit::print(raw_ostream &OS) const {
515 OS << " [" << dwarf::LanguageString(getLanguage()) << "] ";
517 OS << " [" << getDirectory() << "/" << getFilename() << "]";
520 /// print - Print type.
521 void DIType::print(raw_ostream &OS) const {
522 if (!DbgNode) return;
524 StringRef Res = getName();
526 OS << " [" << Res << "] ";
528 unsigned Tag = getTag();
529 OS << " [" << dwarf::TagString(Tag) << "] ";
531 // TODO : Print context
532 getCompileUnit().print(OS);
534 << "line " << getLineNumber() << ", "
535 << getSizeInBits() << " bits, "
536 << getAlignInBits() << " bit alignment, "
537 << getOffsetInBits() << " bit offset"
542 else if (isProtected())
543 OS << " [protected] ";
549 DIBasicType(DbgNode).print(OS);
550 else if (isDerivedType())
551 DIDerivedType(DbgNode).print(OS);
552 else if (isCompositeType())
553 DICompositeType(DbgNode).print(OS);
555 OS << "Invalid DIType\n";
562 /// print - Print basic type.
563 void DIBasicType::print(raw_ostream &OS) const {
564 OS << " [" << dwarf::AttributeEncodingString(getEncoding()) << "] ";
567 /// print - Print derived type.
568 void DIDerivedType::print(raw_ostream &OS) const {
569 OS << "\n\t Derived From: "; getTypeDerivedFrom().print(OS);
572 /// print - Print composite type.
573 void DICompositeType::print(raw_ostream &OS) const {
574 DIArray A = getTypeArray();
575 OS << " [" << A.getNumElements() << " elements]";
578 /// print - Print subprogram.
579 void DISubprogram::print(raw_ostream &OS) const {
580 StringRef Res = getName();
582 OS << " [" << Res << "] ";
584 unsigned Tag = getTag();
585 OS << " [" << dwarf::TagString(Tag) << "] ";
587 // TODO : Print context
588 getCompileUnit().print(OS);
589 OS << " [" << getLineNumber() << "] ";
600 /// print - Print global variable.
601 void DIGlobalVariable::print(raw_ostream &OS) const {
603 StringRef Res = getName();
605 OS << " [" << Res << "] ";
607 unsigned Tag = getTag();
608 OS << " [" << dwarf::TagString(Tag) << "] ";
610 // TODO : Print context
611 getCompileUnit().print(OS);
612 OS << " [" << getLineNumber() << "] ";
620 if (isGlobalVariable())
621 DIGlobalVariable(DbgNode).print(OS);
625 /// print - Print variable.
626 void DIVariable::print(raw_ostream &OS) const {
627 StringRef Res = getName();
629 OS << " [" << Res << "] ";
631 getCompileUnit().print(OS);
632 OS << " [" << getLineNumber() << "] ";
636 // FIXME: Dump complex addresses
639 /// dump - Print descriptor to dbgs() with a newline.
640 void DIDescriptor::dump() const {
641 print(dbgs()); dbgs() << '\n';
644 /// dump - Print compile unit to dbgs() with a newline.
645 void DICompileUnit::dump() const {
646 print(dbgs()); dbgs() << '\n';
649 /// dump - Print type to dbgs() with a newline.
650 void DIType::dump() const {
651 print(dbgs()); dbgs() << '\n';
654 /// dump - Print basic type to dbgs() with a newline.
655 void DIBasicType::dump() const {
656 print(dbgs()); dbgs() << '\n';
659 /// dump - Print derived type to dbgs() with a newline.
660 void DIDerivedType::dump() const {
661 print(dbgs()); dbgs() << '\n';
664 /// dump - Print composite type to dbgs() with a newline.
665 void DICompositeType::dump() const {
666 print(dbgs()); dbgs() << '\n';
669 /// dump - Print subprogram to dbgs() with a newline.
670 void DISubprogram::dump() const {
671 print(dbgs()); dbgs() << '\n';
674 /// dump - Print global variable.
675 void DIGlobalVariable::dump() const {
676 print(dbgs()); dbgs() << '\n';
679 /// dump - Print variable.
680 void DIVariable::dump() const {
681 print(dbgs()); dbgs() << '\n';
684 //===----------------------------------------------------------------------===//
685 // DIFactory: Basic Helpers
686 //===----------------------------------------------------------------------===//
688 DIFactory::DIFactory(Module &m)
689 : M(m), VMContext(M.getContext()), DeclareFn(0), ValueFn(0) {}
691 Constant *DIFactory::GetTagConstant(unsigned TAG) {
692 assert((TAG & LLVMDebugVersionMask) == 0 &&
693 "Tag too large for debug encoding!");
694 return ConstantInt::get(Type::getInt32Ty(VMContext), TAG | LLVMDebugVersion);
697 //===----------------------------------------------------------------------===//
698 // DIFactory: Primary Constructors
699 //===----------------------------------------------------------------------===//
701 /// GetOrCreateArray - Create an descriptor for an array of descriptors.
702 /// This implicitly uniques the arrays created.
703 DIArray DIFactory::GetOrCreateArray(DIDescriptor *Tys, unsigned NumTys) {
705 Value *Null = llvm::Constant::getNullValue(Type::getInt32Ty(VMContext));
706 return DIArray(MDNode::get(VMContext, &Null, 1));
709 SmallVector<Value *, 16> Elts(Tys, Tys+NumTys);
710 return DIArray(MDNode::get(VMContext, Elts.data(), Elts.size()));
713 /// GetOrCreateSubrange - Create a descriptor for a value range. This
714 /// implicitly uniques the values returned.
715 DISubrange DIFactory::GetOrCreateSubrange(int64_t Lo, int64_t Hi) {
717 GetTagConstant(dwarf::DW_TAG_subrange_type),
718 ConstantInt::get(Type::getInt64Ty(VMContext), Lo),
719 ConstantInt::get(Type::getInt64Ty(VMContext), Hi)
722 return DISubrange(MDNode::get(VMContext, &Elts[0], 3));
727 /// CreateCompileUnit - Create a new descriptor for the specified compile
728 /// unit. Note that this does not unique compile units within the module.
729 DICompileUnit DIFactory::CreateCompileUnit(unsigned LangID,
736 unsigned RunTimeVer) {
738 GetTagConstant(dwarf::DW_TAG_compile_unit),
739 llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
740 ConstantInt::get(Type::getInt32Ty(VMContext), LangID),
741 MDString::get(VMContext, Filename),
742 MDString::get(VMContext, Directory),
743 MDString::get(VMContext, Producer),
744 ConstantInt::get(Type::getInt1Ty(VMContext), isMain),
745 ConstantInt::get(Type::getInt1Ty(VMContext), isOptimized),
746 MDString::get(VMContext, Flags),
747 ConstantInt::get(Type::getInt32Ty(VMContext), RunTimeVer)
750 return DICompileUnit(MDNode::get(VMContext, &Elts[0], 10));
753 /// CreateFile - Create a new descriptor for the specified file.
754 DIFile DIFactory::CreateFile(StringRef Filename,
758 GetTagConstant(dwarf::DW_TAG_file_type),
759 MDString::get(VMContext, Filename),
760 MDString::get(VMContext, Directory),
764 return DIFile(MDNode::get(VMContext, &Elts[0], 4));
767 /// CreateEnumerator - Create a single enumerator value.
768 DIEnumerator DIFactory::CreateEnumerator(StringRef Name, uint64_t Val){
770 GetTagConstant(dwarf::DW_TAG_enumerator),
771 MDString::get(VMContext, Name),
772 ConstantInt::get(Type::getInt64Ty(VMContext), Val)
774 return DIEnumerator(MDNode::get(VMContext, &Elts[0], 3));
778 /// CreateBasicType - Create a basic type like int, float, etc.
779 DIBasicType DIFactory::CreateBasicType(DIDescriptor Context,
784 uint64_t AlignInBits,
785 uint64_t OffsetInBits, unsigned Flags,
788 GetTagConstant(dwarf::DW_TAG_base_type),
790 MDString::get(VMContext, Name),
792 ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
793 ConstantInt::get(Type::getInt64Ty(VMContext), SizeInBits),
794 ConstantInt::get(Type::getInt64Ty(VMContext), AlignInBits),
795 ConstantInt::get(Type::getInt64Ty(VMContext), OffsetInBits),
796 ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
797 ConstantInt::get(Type::getInt32Ty(VMContext), Encoding)
799 return DIBasicType(MDNode::get(VMContext, &Elts[0], 10));
803 /// CreateBasicType - Create a basic type like int, float, etc.
804 DIBasicType DIFactory::CreateBasicTypeEx(DIDescriptor Context,
808 Constant *SizeInBits,
809 Constant *AlignInBits,
810 Constant *OffsetInBits, unsigned Flags,
813 GetTagConstant(dwarf::DW_TAG_base_type),
815 MDString::get(VMContext, Name),
817 ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
821 ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
822 ConstantInt::get(Type::getInt32Ty(VMContext), Encoding)
824 return DIBasicType(MDNode::get(VMContext, &Elts[0], 10));
827 /// CreateArtificialType - Create a new DIType with "artificial" flag set.
828 DIType DIFactory::CreateArtificialType(DIType Ty) {
829 if (Ty.isArtificial())
832 SmallVector<Value *, 9> Elts;
834 assert (N && "Unexpected input DIType!");
835 for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
836 if (Value *V = N->getOperand(i))
839 Elts.push_back(Constant::getNullValue(Type::getInt32Ty(VMContext)));
842 unsigned CurFlags = Ty.getFlags();
843 CurFlags = CurFlags | DIType::FlagArtificial;
845 // Flags are stored at this slot.
846 Elts[8] = ConstantInt::get(Type::getInt32Ty(VMContext), CurFlags);
848 return DIType(MDNode::get(VMContext, Elts.data(), Elts.size()));
851 /// CreateDerivedType - Create a derived type like const qualified type,
852 /// pointer, typedef, etc.
853 DIDerivedType DIFactory::CreateDerivedType(unsigned Tag,
854 DIDescriptor Context,
859 uint64_t AlignInBits,
860 uint64_t OffsetInBits,
862 DIType DerivedFrom) {
866 MDString::get(VMContext, Name),
868 ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
869 ConstantInt::get(Type::getInt64Ty(VMContext), SizeInBits),
870 ConstantInt::get(Type::getInt64Ty(VMContext), AlignInBits),
871 ConstantInt::get(Type::getInt64Ty(VMContext), OffsetInBits),
872 ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
875 return DIDerivedType(MDNode::get(VMContext, &Elts[0], 10));
879 /// CreateDerivedType - Create a derived type like const qualified type,
880 /// pointer, typedef, etc.
881 DIDerivedType DIFactory::CreateDerivedTypeEx(unsigned Tag,
882 DIDescriptor Context,
886 Constant *SizeInBits,
887 Constant *AlignInBits,
888 Constant *OffsetInBits,
890 DIType DerivedFrom) {
894 MDString::get(VMContext, Name),
896 ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
900 ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
903 return DIDerivedType(MDNode::get(VMContext, &Elts[0], 10));
907 /// CreateCompositeType - Create a composite type like array, struct, etc.
908 DICompositeType DIFactory::CreateCompositeType(unsigned Tag,
909 DIDescriptor Context,
914 uint64_t AlignInBits,
915 uint64_t OffsetInBits,
919 unsigned RuntimeLang,
920 MDNode *ContainingType) {
925 MDString::get(VMContext, Name),
927 ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
928 ConstantInt::get(Type::getInt64Ty(VMContext), SizeInBits),
929 ConstantInt::get(Type::getInt64Ty(VMContext), AlignInBits),
930 ConstantInt::get(Type::getInt64Ty(VMContext), OffsetInBits),
931 ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
934 ConstantInt::get(Type::getInt32Ty(VMContext), RuntimeLang),
938 MDNode *Node = MDNode::get(VMContext, &Elts[0], 13);
939 // Create a named metadata so that we do not lose this enum info.
940 if (Tag == dwarf::DW_TAG_enumeration_type) {
941 NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.enum");
942 NMD->addOperand(Node);
944 return DICompositeType(Node);
948 /// CreateTemporaryType - Create a temporary forward-declared type.
949 DIType DIFactory::CreateTemporaryType() {
950 // Give the temporary MDNode a tag. It doesn't matter what tag we
951 // use here as long as DIType accepts it.
953 GetTagConstant(DW_TAG_base_type)
955 MDNode *Node = MDNode::getTemporary(VMContext, Elts, array_lengthof(Elts));
960 /// CreateCompositeType - Create a composite type like array, struct, etc.
961 DICompositeType DIFactory::CreateCompositeTypeEx(unsigned Tag,
962 DIDescriptor Context,
966 Constant *SizeInBits,
967 Constant *AlignInBits,
968 Constant *OffsetInBits,
972 unsigned RuntimeLang,
973 MDNode *ContainingType) {
977 MDString::get(VMContext, Name),
979 ConstantInt::get(Type::getInt32Ty(VMContext), LineNumber),
983 ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
986 ConstantInt::get(Type::getInt32Ty(VMContext), RuntimeLang),
989 MDNode *Node = MDNode::get(VMContext, &Elts[0], 13);
990 // Create a named metadata so that we do not lose this enum info.
991 if (Tag == dwarf::DW_TAG_enumeration_type) {
992 NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.enum");
993 NMD->addOperand(Node);
995 return DICompositeType(Node);
999 /// CreateSubprogram - Create a new descriptor for the specified subprogram.
1000 /// See comments in DISubprogram for descriptions of these fields. This
1001 /// method does not unique the generated descriptors.
1002 DISubprogram DIFactory::CreateSubprogram(DIDescriptor Context,
1004 StringRef DisplayName,
1005 StringRef LinkageName,
1007 unsigned LineNo, DIType Ty,
1010 unsigned VK, unsigned VIndex,
1011 DIType ContainingType,
1017 GetTagConstant(dwarf::DW_TAG_subprogram),
1018 llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
1020 MDString::get(VMContext, Name),
1021 MDString::get(VMContext, DisplayName),
1022 MDString::get(VMContext, LinkageName),
1024 ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
1026 ConstantInt::get(Type::getInt1Ty(VMContext), isLocalToUnit),
1027 ConstantInt::get(Type::getInt1Ty(VMContext), isDefinition),
1028 ConstantInt::get(Type::getInt32Ty(VMContext), (unsigned)VK),
1029 ConstantInt::get(Type::getInt32Ty(VMContext), VIndex),
1031 ConstantInt::get(Type::getInt32Ty(VMContext), Flags),
1032 ConstantInt::get(Type::getInt1Ty(VMContext), isOptimized),
1035 MDNode *Node = MDNode::get(VMContext, &Elts[0], 17);
1037 // Create a named metadata so that we do not lose this mdnode.
1038 NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.sp");
1039 NMD->addOperand(Node);
1040 return DISubprogram(Node);
1043 /// CreateSubprogramDefinition - Create new subprogram descriptor for the
1044 /// given declaration.
1045 DISubprogram DIFactory::CreateSubprogramDefinition(DISubprogram &SPDeclaration){
1046 if (SPDeclaration.isDefinition())
1047 return DISubprogram(SPDeclaration);
1049 MDNode *DeclNode = SPDeclaration;
1051 GetTagConstant(dwarf::DW_TAG_subprogram),
1052 llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
1053 DeclNode->getOperand(2), // Context
1054 DeclNode->getOperand(3), // Name
1055 DeclNode->getOperand(4), // DisplayName
1056 DeclNode->getOperand(5), // LinkageName
1057 DeclNode->getOperand(6), // CompileUnit
1058 DeclNode->getOperand(7), // LineNo
1059 DeclNode->getOperand(8), // Type
1060 DeclNode->getOperand(9), // isLocalToUnit
1061 ConstantInt::get(Type::getInt1Ty(VMContext), true),
1062 DeclNode->getOperand(11), // Virtuality
1063 DeclNode->getOperand(12), // VIndex
1064 DeclNode->getOperand(13), // Containting Type
1065 DeclNode->getOperand(14), // Flags
1066 DeclNode->getOperand(15), // isOptimized
1067 SPDeclaration.getFunction()
1069 MDNode *Node =MDNode::get(VMContext, &Elts[0], 16);
1071 // Create a named metadata so that we do not lose this mdnode.
1072 NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.sp");
1073 NMD->addOperand(Node);
1074 return DISubprogram(Node);
1077 /// CreateGlobalVariable - Create a new descriptor for the specified global.
1079 DIFactory::CreateGlobalVariable(DIDescriptor Context, StringRef Name,
1080 StringRef DisplayName,
1081 StringRef LinkageName,
1083 unsigned LineNo, DIType Ty,bool isLocalToUnit,
1084 bool isDefinition, llvm::GlobalVariable *Val) {
1086 GetTagConstant(dwarf::DW_TAG_variable),
1087 llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
1089 MDString::get(VMContext, Name),
1090 MDString::get(VMContext, DisplayName),
1091 MDString::get(VMContext, LinkageName),
1093 ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
1095 ConstantInt::get(Type::getInt1Ty(VMContext), isLocalToUnit),
1096 ConstantInt::get(Type::getInt1Ty(VMContext), isDefinition),
1100 Value *const *Vs = &Elts[0];
1101 MDNode *Node = MDNode::get(VMContext,Vs, 12);
1103 // Create a named metadata so that we do not lose this mdnode.
1104 NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.gv");
1105 NMD->addOperand(Node);
1107 return DIGlobalVariable(Node);
1110 /// CreateGlobalVariable - Create a new descriptor for the specified constant.
1112 DIFactory::CreateGlobalVariable(DIDescriptor Context, StringRef Name,
1113 StringRef DisplayName,
1114 StringRef LinkageName,
1116 unsigned LineNo, DIType Ty,bool isLocalToUnit,
1117 bool isDefinition, llvm::Constant *Val) {
1119 GetTagConstant(dwarf::DW_TAG_variable),
1120 llvm::Constant::getNullValue(Type::getInt32Ty(VMContext)),
1122 MDString::get(VMContext, Name),
1123 MDString::get(VMContext, DisplayName),
1124 MDString::get(VMContext, LinkageName),
1126 ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
1128 ConstantInt::get(Type::getInt1Ty(VMContext), isLocalToUnit),
1129 ConstantInt::get(Type::getInt1Ty(VMContext), isDefinition),
1133 Value *const *Vs = &Elts[0];
1134 MDNode *Node = MDNode::get(VMContext,Vs, 12);
1136 // Create a named metadata so that we do not lose this mdnode.
1137 NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.gv");
1138 NMD->addOperand(Node);
1140 return DIGlobalVariable(Node);
1143 /// CreateVariable - Create a new descriptor for the specified variable.
1144 DIVariable DIFactory::CreateVariable(unsigned Tag, DIDescriptor Context,
1148 DIType Ty, bool AlwaysPreserve) {
1150 GetTagConstant(Tag),
1152 MDString::get(VMContext, Name),
1154 ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
1157 MDNode *Node = MDNode::get(VMContext, &Elts[0], 6);
1158 if (AlwaysPreserve) {
1159 // The optimizer may remove local variable. If there is an interest
1160 // to preserve variable info in such situation then stash it in a
1162 DISubprogram Fn(getDISubprogram(Context));
1163 StringRef FName = "fn";
1164 if (Fn.getFunction())
1165 FName = Fn.getFunction()->getName();
1167 if (FName.startswith(StringRef(&One, 1)))
1168 FName = FName.substr(1);
1170 SmallString<32> Out;
1171 NamedMDNode *FnLocals =
1172 M.getOrInsertNamedMetadata(Twine("llvm.dbg.lv.", FName).toStringRef(Out));
1173 FnLocals->addOperand(Node);
1175 return DIVariable(Node);
1179 /// CreateComplexVariable - Create a new descriptor for the specified variable
1180 /// which has a complex address expression for its address.
1181 DIVariable DIFactory::CreateComplexVariable(unsigned Tag, DIDescriptor Context,
1182 StringRef Name, DIFile F,
1184 DIType Ty, Value *const *Addr,
1186 SmallVector<Value *, 15> Elts;
1187 Elts.push_back(GetTagConstant(Tag));
1188 Elts.push_back(Context);
1189 Elts.push_back(MDString::get(VMContext, Name));
1191 Elts.push_back(ConstantInt::get(Type::getInt32Ty(VMContext), LineNo));
1193 Elts.append(Addr, Addr+NumAddr);
1195 return DIVariable(MDNode::get(VMContext, Elts.data(), Elts.size()));
1199 /// CreateBlock - This creates a descriptor for a lexical block with the
1200 /// specified parent VMContext.
1201 DILexicalBlock DIFactory::CreateLexicalBlock(DIDescriptor Context,
1202 DIFile F, unsigned LineNo,
1204 // Defeat MDNode uniqing for lexical blocks.
1205 static unsigned int unique_id = 0;
1207 GetTagConstant(dwarf::DW_TAG_lexical_block),
1209 ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
1210 ConstantInt::get(Type::getInt32Ty(VMContext), Col),
1212 ConstantInt::get(Type::getInt32Ty(VMContext), unique_id++)
1214 return DILexicalBlock(MDNode::get(VMContext, &Elts[0], 6));
1217 /// CreateNameSpace - This creates new descriptor for a namespace
1218 /// with the specified parent context.
1219 DINameSpace DIFactory::CreateNameSpace(DIDescriptor Context, StringRef Name,
1223 GetTagConstant(dwarf::DW_TAG_namespace),
1225 MDString::get(VMContext, Name),
1227 ConstantInt::get(Type::getInt32Ty(VMContext), LineNo)
1229 return DINameSpace(MDNode::get(VMContext, &Elts[0], 5));
1232 /// CreateLocation - Creates a debug info location.
1233 DILocation DIFactory::CreateLocation(unsigned LineNo, unsigned ColumnNo,
1234 DIScope S, DILocation OrigLoc) {
1236 ConstantInt::get(Type::getInt32Ty(VMContext), LineNo),
1237 ConstantInt::get(Type::getInt32Ty(VMContext), ColumnNo),
1241 return DILocation(MDNode::get(VMContext, &Elts[0], 4));
1244 //===----------------------------------------------------------------------===//
1245 // DIFactory: Routines for inserting code into a function
1246 //===----------------------------------------------------------------------===//
1248 /// InsertDeclare - Insert a new llvm.dbg.declare intrinsic call.
1249 Instruction *DIFactory::InsertDeclare(Value *Storage, DIVariable D,
1250 Instruction *InsertBefore) {
1251 assert(Storage && "no storage passed to dbg.declare");
1252 assert(D.Verify() && "empty DIVariable passed to dbg.declare");
1254 DeclareFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_declare);
1256 Value *Args[] = { MDNode::get(Storage->getContext(), &Storage, 1),
1258 return CallInst::Create(DeclareFn, Args, Args+2, "", InsertBefore);
1261 /// InsertDeclare - Insert a new llvm.dbg.declare intrinsic call.
1262 Instruction *DIFactory::InsertDeclare(Value *Storage, DIVariable D,
1263 BasicBlock *InsertAtEnd) {
1264 assert(Storage && "no storage passed to dbg.declare");
1265 assert(D.Verify() && "invalid DIVariable passed to dbg.declare");
1267 DeclareFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_declare);
1269 Value *Args[] = { MDNode::get(Storage->getContext(), &Storage, 1),
1272 // If this block already has a terminator then insert this intrinsic
1273 // before the terminator.
1274 if (TerminatorInst *T = InsertAtEnd->getTerminator())
1275 return CallInst::Create(DeclareFn, Args, Args+2, "", T);
1277 return CallInst::Create(DeclareFn, Args, Args+2, "", InsertAtEnd);}
1279 /// InsertDbgValueIntrinsic - Insert a new llvm.dbg.value intrinsic call.
1280 Instruction *DIFactory::InsertDbgValueIntrinsic(Value *V, uint64_t Offset,
1282 Instruction *InsertBefore) {
1283 assert(V && "no value passed to dbg.value");
1284 assert(D.Verify() && "invalid DIVariable passed to dbg.value");
1286 ValueFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_value);
1288 Value *Args[] = { MDNode::get(V->getContext(), &V, 1),
1289 ConstantInt::get(Type::getInt64Ty(V->getContext()), Offset),
1291 return CallInst::Create(ValueFn, Args, Args+3, "", InsertBefore);
1294 /// InsertDbgValueIntrinsic - Insert a new llvm.dbg.value intrinsic call.
1295 Instruction *DIFactory::InsertDbgValueIntrinsic(Value *V, uint64_t Offset,
1297 BasicBlock *InsertAtEnd) {
1298 assert(V && "no value passed to dbg.value");
1299 assert(D.Verify() && "invalid DIVariable passed to dbg.value");
1301 ValueFn = Intrinsic::getDeclaration(&M, Intrinsic::dbg_value);
1303 Value *Args[] = { MDNode::get(V->getContext(), &V, 1),
1304 ConstantInt::get(Type::getInt64Ty(V->getContext()), Offset),
1306 return CallInst::Create(ValueFn, Args, Args+3, "", InsertAtEnd);
1309 // RecordType - Record DIType in a module such that it is not lost even if
1310 // it is not referenced through debug info anchors.
1311 void DIFactory::RecordType(DIType T) {
1312 NamedMDNode *NMD = M.getOrInsertNamedMetadata("llvm.dbg.ty");
1317 //===----------------------------------------------------------------------===//
1318 // DebugInfoFinder implementations.
1319 //===----------------------------------------------------------------------===//
1321 /// processModule - Process entire module and collect debug info.
1322 void DebugInfoFinder::processModule(Module &M) {
1323 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
1324 for (Function::iterator FI = (*I).begin(), FE = (*I).end(); FI != FE; ++FI)
1325 for (BasicBlock::iterator BI = (*FI).begin(), BE = (*FI).end(); BI != BE;
1327 if (DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(BI))
1328 processDeclare(DDI);
1330 DebugLoc Loc = BI->getDebugLoc();
1331 if (Loc.isUnknown())
1334 LLVMContext &Ctx = BI->getContext();
1335 DIDescriptor Scope(Loc.getScope(Ctx));
1337 if (Scope.isCompileUnit())
1338 addCompileUnit(DICompileUnit(Scope));
1339 else if (Scope.isSubprogram())
1340 processSubprogram(DISubprogram(Scope));
1341 else if (Scope.isLexicalBlock())
1342 processLexicalBlock(DILexicalBlock(Scope));
1344 if (MDNode *IA = Loc.getInlinedAt(Ctx))
1345 processLocation(DILocation(IA));
1348 if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.gv")) {
1349 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
1350 DIGlobalVariable DIG(cast<MDNode>(NMD->getOperand(i)));
1351 if (addGlobalVariable(DIG)) {
1352 addCompileUnit(DIG.getCompileUnit());
1353 processType(DIG.getType());
1358 if (NamedMDNode *NMD = M.getNamedMetadata("llvm.dbg.sp"))
1359 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i)
1360 processSubprogram(DISubprogram(NMD->getOperand(i)));
1363 /// processLocation - Process DILocation.
1364 void DebugInfoFinder::processLocation(DILocation Loc) {
1365 if (!Loc.Verify()) return;
1366 DIDescriptor S(Loc.getScope());
1367 if (S.isCompileUnit())
1368 addCompileUnit(DICompileUnit(S));
1369 else if (S.isSubprogram())
1370 processSubprogram(DISubprogram(S));
1371 else if (S.isLexicalBlock())
1372 processLexicalBlock(DILexicalBlock(S));
1373 processLocation(Loc.getOrigLocation());
1376 /// processType - Process DIType.
1377 void DebugInfoFinder::processType(DIType DT) {
1381 addCompileUnit(DT.getCompileUnit());
1382 if (DT.isCompositeType()) {
1383 DICompositeType DCT(DT);
1384 processType(DCT.getTypeDerivedFrom());
1385 DIArray DA = DCT.getTypeArray();
1386 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
1387 DIDescriptor D = DA.getElement(i);
1389 processType(DIType(D));
1390 else if (D.isSubprogram())
1391 processSubprogram(DISubprogram(D));
1393 } else if (DT.isDerivedType()) {
1394 DIDerivedType DDT(DT);
1395 processType(DDT.getTypeDerivedFrom());
1399 /// processLexicalBlock
1400 void DebugInfoFinder::processLexicalBlock(DILexicalBlock LB) {
1401 DIScope Context = LB.getContext();
1402 if (Context.isLexicalBlock())
1403 return processLexicalBlock(DILexicalBlock(Context));
1405 return processSubprogram(DISubprogram(Context));
1408 /// processSubprogram - Process DISubprogram.
1409 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
1410 if (!addSubprogram(SP))
1412 addCompileUnit(SP.getCompileUnit());
1413 processType(SP.getType());
1416 /// processDeclare - Process DbgDeclareInst.
1417 void DebugInfoFinder::processDeclare(DbgDeclareInst *DDI) {
1418 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
1422 if (!DV.isVariable())
1425 if (!NodesSeen.insert(DV))
1428 addCompileUnit(DIVariable(N).getCompileUnit());
1429 processType(DIVariable(N).getType());
1432 /// addType - Add type into Tys.
1433 bool DebugInfoFinder::addType(DIType DT) {
1437 if (!NodesSeen.insert(DT))
1444 /// addCompileUnit - Add compile unit into CUs.
1445 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
1449 if (!NodesSeen.insert(CU))
1456 /// addGlobalVariable - Add global variable into GVs.
1457 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
1458 if (!DIDescriptor(DIG).isGlobalVariable())
1461 if (!NodesSeen.insert(DIG))
1468 // addSubprogram - Add subprgoram into SPs.
1469 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1470 if (!DIDescriptor(SP).isSubprogram())
1473 if (!NodesSeen.insert(SP))
1480 /// Find the debug info descriptor corresponding to this global variable.
1481 static Value *findDbgGlobalDeclare(GlobalVariable *V) {
1482 const Module *M = V->getParent();
1483 NamedMDNode *NMD = M->getNamedMetadata("llvm.dbg.gv");
1487 for (unsigned i = 0, e = NMD->getNumOperands(); i != e; ++i) {
1488 DIDescriptor DIG(cast<MDNode>(NMD->getOperand(i)));
1489 if (!DIG.isGlobalVariable())
1491 if (DIGlobalVariable(DIG).getGlobal() == V)
1497 /// Finds the llvm.dbg.declare intrinsic corresponding to this value if any.
1498 /// It looks through pointer casts too.
1499 static const DbgDeclareInst *findDbgDeclare(const Value *V) {
1500 V = V->stripPointerCasts();
1502 if (!isa<Instruction>(V) && !isa<Argument>(V))
1505 const Function *F = NULL;
1506 if (const Instruction *I = dyn_cast<Instruction>(V))
1507 F = I->getParent()->getParent();
1508 else if (const Argument *A = dyn_cast<Argument>(V))
1511 for (Function::const_iterator FI = F->begin(), FE = F->end(); FI != FE; ++FI)
1512 for (BasicBlock::const_iterator BI = (*FI).begin(), BE = (*FI).end();
1514 if (const DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(BI))
1515 if (DDI->getAddress() == V)
1521 bool llvm::getLocationInfo(const Value *V, std::string &DisplayName,
1522 std::string &Type, unsigned &LineNo,
1523 std::string &File, std::string &Dir) {
1527 if (GlobalVariable *GV = dyn_cast<GlobalVariable>(const_cast<Value*>(V))) {
1528 Value *DIGV = findDbgGlobalDeclare(GV);
1529 if (!DIGV) return false;
1530 DIGlobalVariable Var(cast<MDNode>(DIGV));
1532 StringRef D = Var.getDisplayName();
1535 LineNo = Var.getLineNumber();
1536 Unit = Var.getCompileUnit();
1537 TypeD = Var.getType();
1539 const DbgDeclareInst *DDI = findDbgDeclare(V);
1540 if (!DDI) return false;
1541 DIVariable Var(cast<MDNode>(DDI->getVariable()));
1543 StringRef D = Var.getName();
1546 LineNo = Var.getLineNumber();
1547 Unit = Var.getCompileUnit();
1548 TypeD = Var.getType();
1551 StringRef T = TypeD.getName();
1554 StringRef F = Unit.getFilename();
1557 StringRef D = Unit.getDirectory();
1563 /// getDISubprogram - Find subprogram that is enclosing this scope.
1564 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
1565 DIDescriptor D(Scope);
1566 if (D.isSubprogram())
1567 return DISubprogram(Scope);
1569 if (D.isLexicalBlock())
1570 return getDISubprogram(DILexicalBlock(Scope).getContext());
1572 return DISubprogram();
1575 /// getDICompositeType - Find underlying composite type.
1576 DICompositeType llvm::getDICompositeType(DIType T) {
1577 if (T.isCompositeType())
1578 return DICompositeType(T);
1580 if (T.isDerivedType())
1581 return getDICompositeType(DIDerivedType(T).getTypeDerivedFrom());
1583 return DICompositeType();