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/IR/DebugInfo.h"
16 #include "LLVMContextImpl.h"
17 #include "llvm/ADT/STLExtras.h"
18 #include "llvm/ADT/SmallPtrSet.h"
19 #include "llvm/ADT/SmallString.h"
20 #include "llvm/Analysis/ValueTracking.h"
21 #include "llvm/IR/Constants.h"
22 #include "llvm/IR/DIBuilder.h"
23 #include "llvm/IR/DerivedTypes.h"
24 #include "llvm/IR/Instructions.h"
25 #include "llvm/IR/IntrinsicInst.h"
26 #include "llvm/IR/Intrinsics.h"
27 #include "llvm/IR/Module.h"
28 #include "llvm/IR/ValueHandle.h"
29 #include "llvm/Support/Debug.h"
30 #include "llvm/Support/Dwarf.h"
31 #include "llvm/Support/raw_ostream.h"
33 using namespace llvm::dwarf;
35 //===----------------------------------------------------------------------===//
37 //===----------------------------------------------------------------------===//
39 bool DIDescriptor::Verify() const {
41 (DIDerivedType(DbgNode).Verify() ||
42 DICompositeType(DbgNode).Verify() || DIBasicType(DbgNode).Verify() ||
43 DIVariable(DbgNode).Verify() || DISubprogram(DbgNode).Verify() ||
44 DIGlobalVariable(DbgNode).Verify() || DIFile(DbgNode).Verify() ||
45 DICompileUnit(DbgNode).Verify() || DINameSpace(DbgNode).Verify() ||
46 DILexicalBlock(DbgNode).Verify() ||
47 DILexicalBlockFile(DbgNode).Verify() ||
48 DISubrange(DbgNode).Verify() || DIEnumerator(DbgNode).Verify() ||
49 DIObjCProperty(DbgNode).Verify() ||
50 DITemplateTypeParameter(DbgNode).Verify() ||
51 DITemplateValueParameter(DbgNode).Verify() ||
52 DIImportedEntity(DbgNode).Verify() || DIExpression(DbgNode).Verify());
55 static Value *getField(const MDNode *DbgNode, unsigned Elt) {
56 if (!DbgNode || Elt >= DbgNode->getNumOperands())
58 return DbgNode->getOperand(Elt);
61 static MDNode *getNodeField(const MDNode *DbgNode, unsigned Elt) {
62 return dyn_cast_or_null<MDNode>(getField(DbgNode, Elt));
65 static StringRef getStringField(const MDNode *DbgNode, unsigned Elt) {
66 if (MDString *MDS = dyn_cast_or_null<MDString>(getField(DbgNode, Elt)))
67 return MDS->getString();
71 StringRef DIDescriptor::getStringField(unsigned Elt) const {
72 return ::getStringField(DbgNode, Elt);
75 uint64_t DIDescriptor::getUInt64Field(unsigned Elt) const {
79 if (Elt < DbgNode->getNumOperands())
81 dyn_cast_or_null<ConstantInt>(DbgNode->getOperand(Elt)))
82 return CI->getZExtValue();
87 int64_t DIDescriptor::getInt64Field(unsigned Elt) const {
91 if (Elt < DbgNode->getNumOperands())
93 dyn_cast_or_null<ConstantInt>(DbgNode->getOperand(Elt)))
94 return CI->getSExtValue();
99 DIDescriptor DIDescriptor::getDescriptorField(unsigned Elt) const {
100 MDNode *Field = getNodeField(DbgNode, Elt);
101 return DIDescriptor(Field);
104 GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
108 if (Elt < DbgNode->getNumOperands())
109 return dyn_cast_or_null<GlobalVariable>(DbgNode->getOperand(Elt));
113 Constant *DIDescriptor::getConstantField(unsigned Elt) const {
117 if (Elt < DbgNode->getNumOperands())
118 return dyn_cast_or_null<Constant>(DbgNode->getOperand(Elt));
122 Function *DIDescriptor::getFunctionField(unsigned Elt) const {
126 if (Elt < DbgNode->getNumOperands())
127 return dyn_cast_or_null<Function>(DbgNode->getOperand(Elt));
131 void DIDescriptor::replaceFunctionField(unsigned Elt, Function *F) {
135 if (Elt < DbgNode->getNumOperands()) {
136 MDNode *Node = const_cast<MDNode *>(DbgNode);
137 Node->replaceOperandWith(Elt, F);
141 /// getInlinedAt - If this variable is inlined then return inline location.
142 MDNode *DIVariable::getInlinedAt() const { return getNodeField(DbgNode, 7); }
144 /// Return the size reported by the variable's type.
145 unsigned DIVariable::getSizeInBits(const DITypeIdentifierMap &Map) {
146 DIType Ty = getType().resolve(Map);
147 // Follow derived types until we reach a type that
148 // reports back a size.
149 while (Ty.isDerivedType() && !Ty.getSizeInBits()) {
150 DIDerivedType DT(&*Ty);
151 Ty = DT.getTypeDerivedFrom().resolve(Map);
153 assert(Ty.getSizeInBits() && "type with size 0");
154 return Ty.getSizeInBits();
157 uint64_t DIExpression::getElement(unsigned Idx) const {
158 unsigned I = Idx + 1;
159 if (I < DbgNode->getNumOperands())
160 if (auto *CI = dyn_cast_or_null<ConstantInt>(DbgNode->getOperand(I)))
161 return CI->getZExtValue();
163 assert(false && "non-existing complex address element requested");
167 bool DIExpression::isVariablePiece() const {
168 return getNumElements() && getElement(0) == dwarf::DW_OP_piece;
171 uint64_t DIExpression::getPieceOffset() const {
172 assert(isVariablePiece());
173 return getElement(1);
176 uint64_t DIExpression::getPieceSize() const {
177 assert(isVariablePiece());
178 return getElement(2);
181 //===----------------------------------------------------------------------===//
183 //===----------------------------------------------------------------------===//
185 bool DIDescriptor::isSubroutineType() const {
186 return isCompositeType() && getTag() == dwarf::DW_TAG_subroutine_type;
189 /// isBasicType - Return true if the specified tag is legal for
191 bool DIDescriptor::isBasicType() const {
195 case dwarf::DW_TAG_base_type:
196 case dwarf::DW_TAG_unspecified_type:
203 /// isDerivedType - Return true if the specified tag is legal for DIDerivedType.
204 bool DIDescriptor::isDerivedType() const {
208 case dwarf::DW_TAG_typedef:
209 case dwarf::DW_TAG_pointer_type:
210 case dwarf::DW_TAG_ptr_to_member_type:
211 case dwarf::DW_TAG_reference_type:
212 case dwarf::DW_TAG_rvalue_reference_type:
213 case dwarf::DW_TAG_const_type:
214 case dwarf::DW_TAG_volatile_type:
215 case dwarf::DW_TAG_restrict_type:
216 case dwarf::DW_TAG_member:
217 case dwarf::DW_TAG_inheritance:
218 case dwarf::DW_TAG_friend:
221 // CompositeTypes are currently modelled as DerivedTypes.
222 return isCompositeType();
226 /// isCompositeType - Return true if the specified tag is legal for
228 bool DIDescriptor::isCompositeType() const {
232 case dwarf::DW_TAG_array_type:
233 case dwarf::DW_TAG_structure_type:
234 case dwarf::DW_TAG_union_type:
235 case dwarf::DW_TAG_enumeration_type:
236 case dwarf::DW_TAG_subroutine_type:
237 case dwarf::DW_TAG_class_type:
244 /// isVariable - Return true if the specified tag is legal for DIVariable.
245 bool DIDescriptor::isVariable() const {
249 case dwarf::DW_TAG_auto_variable:
250 case dwarf::DW_TAG_arg_variable:
257 /// isType - Return true if the specified tag is legal for DIType.
258 bool DIDescriptor::isType() const {
259 return isBasicType() || isCompositeType() || isDerivedType();
262 /// isSubprogram - Return true if the specified tag is legal for
264 bool DIDescriptor::isSubprogram() const {
265 return DbgNode && getTag() == dwarf::DW_TAG_subprogram;
268 /// isGlobalVariable - Return true if the specified tag is legal for
269 /// DIGlobalVariable.
270 bool DIDescriptor::isGlobalVariable() const {
271 return DbgNode && (getTag() == dwarf::DW_TAG_variable ||
272 getTag() == dwarf::DW_TAG_constant);
275 /// isScope - Return true if the specified tag is one of the scope
277 bool DIDescriptor::isScope() const {
281 case dwarf::DW_TAG_compile_unit:
282 case dwarf::DW_TAG_lexical_block:
283 case dwarf::DW_TAG_subprogram:
284 case dwarf::DW_TAG_namespace:
285 case dwarf::DW_TAG_file_type:
293 /// isTemplateTypeParameter - Return true if the specified tag is
294 /// DW_TAG_template_type_parameter.
295 bool DIDescriptor::isTemplateTypeParameter() const {
296 return DbgNode && getTag() == dwarf::DW_TAG_template_type_parameter;
299 /// isTemplateValueParameter - Return true if the specified tag is
300 /// DW_TAG_template_value_parameter.
301 bool DIDescriptor::isTemplateValueParameter() const {
302 return DbgNode && (getTag() == dwarf::DW_TAG_template_value_parameter ||
303 getTag() == dwarf::DW_TAG_GNU_template_template_param ||
304 getTag() == dwarf::DW_TAG_GNU_template_parameter_pack);
307 /// isCompileUnit - Return true if the specified tag is DW_TAG_compile_unit.
308 bool DIDescriptor::isCompileUnit() const {
309 return DbgNode && getTag() == dwarf::DW_TAG_compile_unit;
312 /// isFile - Return true if the specified tag is DW_TAG_file_type.
313 bool DIDescriptor::isFile() const {
314 return DbgNode && getTag() == dwarf::DW_TAG_file_type;
317 /// isNameSpace - Return true if the specified tag is DW_TAG_namespace.
318 bool DIDescriptor::isNameSpace() const {
319 return DbgNode && getTag() == dwarf::DW_TAG_namespace;
322 /// isLexicalBlockFile - Return true if the specified descriptor is a
323 /// lexical block with an extra file.
324 bool DIDescriptor::isLexicalBlockFile() const {
325 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
326 (DbgNode->getNumOperands() == 4);
329 /// isLexicalBlock - Return true if the specified tag is DW_TAG_lexical_block.
330 bool DIDescriptor::isLexicalBlock() const {
331 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
332 (DbgNode->getNumOperands() > 3);
335 /// isSubrange - Return true if the specified tag is DW_TAG_subrange_type.
336 bool DIDescriptor::isSubrange() const {
337 return DbgNode && getTag() == dwarf::DW_TAG_subrange_type;
340 /// isEnumerator - Return true if the specified tag is DW_TAG_enumerator.
341 bool DIDescriptor::isEnumerator() const {
342 return DbgNode && getTag() == dwarf::DW_TAG_enumerator;
345 /// isObjCProperty - Return true if the specified tag is DW_TAG_APPLE_property.
346 bool DIDescriptor::isObjCProperty() const {
347 return DbgNode && getTag() == dwarf::DW_TAG_APPLE_property;
350 /// \brief Return true if the specified tag is DW_TAG_imported_module or
351 /// DW_TAG_imported_declaration.
352 bool DIDescriptor::isImportedEntity() const {
353 return DbgNode && (getTag() == dwarf::DW_TAG_imported_module ||
354 getTag() == dwarf::DW_TAG_imported_declaration);
357 /// \brief Return true if the specified tag is DW_TAG_imported_module or
358 /// DW_TAG_imported_declaration.
359 bool DIDescriptor::isExpression() const {
360 return DbgNode && (getTag() == dwarf::DW_TAG_expression);
363 //===----------------------------------------------------------------------===//
364 // Simple Descriptor Constructors and other Methods
365 //===----------------------------------------------------------------------===//
367 /// replaceAllUsesWith - Replace all uses of the MDNode used by this
368 /// type with the one in the passed descriptor.
369 void DIDescriptor::replaceAllUsesWith(LLVMContext &VMContext, DIDescriptor D) {
371 assert(DbgNode && "Trying to replace an unverified type!");
373 // Since we use a TrackingVH for the node, its easy for clients to manufacture
374 // legitimate situations where they want to replaceAllUsesWith() on something
375 // which, due to uniquing, has merged with the source. We shield clients from
376 // this detail by allowing a value to be replaced with replaceAllUsesWith()
378 const MDNode *DN = D;
380 SmallVector<Value*, 10> Ops(DbgNode->getNumOperands());
381 for (size_t i = 0; i != Ops.size(); ++i)
382 Ops[i] = DbgNode->getOperand(i);
383 DN = MDNode::get(VMContext, Ops);
386 MDNode *Node = const_cast<MDNode *>(DbgNode);
387 const Value *V = cast_or_null<Value>(DN);
388 Node->replaceAllUsesWith(const_cast<Value *>(V));
389 MDNode::deleteTemporary(Node);
393 /// replaceAllUsesWith - Replace all uses of the MDNode used by this
394 /// type with the one in D.
395 void DIDescriptor::replaceAllUsesWith(MDNode *D) {
397 assert(DbgNode && "Trying to replace an unverified type!");
398 assert(DbgNode != D && "This replacement should always happen");
399 MDNode *Node = const_cast<MDNode *>(DbgNode);
400 const MDNode *DN = D;
401 const Value *V = cast_or_null<Value>(DN);
402 Node->replaceAllUsesWith(const_cast<Value *>(V));
403 MDNode::deleteTemporary(Node);
406 /// Verify - Verify that a compile unit is well formed.
407 bool DICompileUnit::Verify() const {
408 if (!isCompileUnit())
411 // Don't bother verifying the compilation directory or producer string
412 // as those could be empty.
413 if (getFilename().empty())
416 return DbgNode->getNumOperands() == 14;
419 /// Verify - Verify that an ObjC property is well formed.
420 bool DIObjCProperty::Verify() const {
421 if (!isObjCProperty())
424 // Don't worry about the rest of the strings for now.
425 return DbgNode->getNumOperands() == 8;
428 /// Check if a field at position Elt of a MDNode is a MDNode.
429 /// We currently allow an empty string and an integer.
430 /// But we don't allow a non-empty string in a MDNode field.
431 static bool fieldIsMDNode(const MDNode *DbgNode, unsigned Elt) {
432 // FIXME: This function should return true, if the field is null or the field
433 // is indeed a MDNode: return !Fld || isa<MDNode>(Fld).
434 Value *Fld = getField(DbgNode, Elt);
435 if (Fld && isa<MDString>(Fld) && !cast<MDString>(Fld)->getString().empty())
440 /// Check if a field at position Elt of a MDNode is a MDString.
441 static bool fieldIsMDString(const MDNode *DbgNode, unsigned Elt) {
442 Value *Fld = getField(DbgNode, Elt);
443 return !Fld || isa<MDString>(Fld);
446 /// Check if a value can be a reference to a type.
447 static bool isTypeRef(const Value *Val) {
449 (isa<MDString>(Val) && !cast<MDString>(Val)->getString().empty()) ||
450 (isa<MDNode>(Val) && DIType(cast<MDNode>(Val)).isType());
453 /// Check if a field at position Elt of a MDNode can be a reference to a type.
454 static bool fieldIsTypeRef(const MDNode *DbgNode, unsigned Elt) {
455 Value *Fld = getField(DbgNode, Elt);
456 return isTypeRef(Fld);
459 /// Check if a value can be a ScopeRef.
460 static bool isScopeRef(const Value *Val) {
462 (isa<MDString>(Val) && !cast<MDString>(Val)->getString().empty()) ||
463 // Not checking for Val->isScope() here, because it would work
464 // only for lexical scopes and not all subclasses of DIScope.
468 /// Check if a field at position Elt of a MDNode can be a ScopeRef.
469 static bool fieldIsScopeRef(const MDNode *DbgNode, unsigned Elt) {
470 Value *Fld = getField(DbgNode, Elt);
471 return isScopeRef(Fld);
474 /// Verify - Verify that a type descriptor is well formed.
475 bool DIType::Verify() const {
478 // Make sure Context @ field 2 is MDNode.
479 if (!fieldIsScopeRef(DbgNode, 2))
482 // FIXME: Sink this into the various subclass verifies.
483 uint16_t Tag = getTag();
484 if (!isBasicType() && Tag != dwarf::DW_TAG_const_type &&
485 Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
486 Tag != dwarf::DW_TAG_ptr_to_member_type &&
487 Tag != dwarf::DW_TAG_reference_type &&
488 Tag != dwarf::DW_TAG_rvalue_reference_type &&
489 Tag != dwarf::DW_TAG_restrict_type && Tag != dwarf::DW_TAG_array_type &&
490 Tag != dwarf::DW_TAG_enumeration_type &&
491 Tag != dwarf::DW_TAG_subroutine_type &&
492 Tag != dwarf::DW_TAG_inheritance && Tag != dwarf::DW_TAG_friend &&
493 getFilename().empty())
496 // DIType is abstract, it should be a BasicType, a DerivedType or
499 return DIBasicType(DbgNode).Verify();
500 else if (isCompositeType())
501 return DICompositeType(DbgNode).Verify();
502 else if (isDerivedType())
503 return DIDerivedType(DbgNode).Verify();
508 /// Verify - Verify that a basic type descriptor is well formed.
509 bool DIBasicType::Verify() const {
510 return isBasicType() && DbgNode->getNumOperands() == 10;
513 /// Verify - Verify that a derived type descriptor is well formed.
514 bool DIDerivedType::Verify() const {
515 // Make sure DerivedFrom @ field 9 is TypeRef.
516 if (!fieldIsTypeRef(DbgNode, 9))
518 if (getTag() == dwarf::DW_TAG_ptr_to_member_type)
519 // Make sure ClassType @ field 10 is a TypeRef.
520 if (!fieldIsTypeRef(DbgNode, 10))
523 return isDerivedType() && DbgNode->getNumOperands() >= 10 &&
524 DbgNode->getNumOperands() <= 14;
527 /// Verify - Verify that a composite type descriptor is well formed.
528 bool DICompositeType::Verify() const {
529 if (!isCompositeType())
532 // Make sure DerivedFrom @ field 9 and ContainingType @ field 12 are TypeRef.
533 if (!fieldIsTypeRef(DbgNode, 9))
535 if (!fieldIsTypeRef(DbgNode, 12))
538 // Make sure the type identifier at field 14 is MDString, it can be null.
539 if (!fieldIsMDString(DbgNode, 14))
542 // A subroutine type can't be both & and &&.
543 if (isLValueReference() && isRValueReference())
546 return DbgNode->getNumOperands() == 15;
549 /// Verify - Verify that a subprogram descriptor is well formed.
550 bool DISubprogram::Verify() const {
554 // Make sure context @ field 2 is a ScopeRef and type @ field 7 is a MDNode.
555 if (!fieldIsScopeRef(DbgNode, 2))
557 if (!fieldIsMDNode(DbgNode, 7))
559 // Containing type @ field 12.
560 if (!fieldIsTypeRef(DbgNode, 12))
563 // A subprogram can't be both & and &&.
564 if (isLValueReference() && isRValueReference())
567 return DbgNode->getNumOperands() == 20;
570 /// Verify - Verify that a global variable descriptor is well formed.
571 bool DIGlobalVariable::Verify() const {
572 if (!isGlobalVariable())
575 if (getDisplayName().empty())
577 // Make sure context @ field 2 is an MDNode.
578 if (!fieldIsMDNode(DbgNode, 2))
580 // Make sure that type @ field 8 is a DITypeRef.
581 if (!fieldIsTypeRef(DbgNode, 8))
583 // Make sure StaticDataMemberDeclaration @ field 12 is MDNode.
584 if (!fieldIsMDNode(DbgNode, 12))
587 return DbgNode->getNumOperands() == 13;
590 /// Verify - Verify that a variable descriptor is well formed.
591 bool DIVariable::Verify() const {
595 // Make sure context @ field 1 is an MDNode.
596 if (!fieldIsMDNode(DbgNode, 1))
598 // Make sure that type @ field 5 is a DITypeRef.
599 if (!fieldIsTypeRef(DbgNode, 5))
602 // Variable without an inline location.
603 if (DbgNode->getNumOperands() == 7)
606 return DbgNode->getNumOperands() == 8;
609 /// Verify - Verify that a variable descriptor is well formed.
610 bool DIExpression::Verify() const { return isExpression(); }
612 /// Verify - Verify that a location descriptor is well formed.
613 bool DILocation::Verify() const {
617 return DbgNode->getNumOperands() == 4;
620 /// Verify - Verify that a namespace descriptor is well formed.
621 bool DINameSpace::Verify() const {
624 return DbgNode->getNumOperands() == 5;
627 /// \brief Retrieve the MDNode for the directory/file pair.
628 MDNode *DIFile::getFileNode() const { return getNodeField(DbgNode, 1); }
630 /// \brief Verify that the file descriptor is well formed.
631 bool DIFile::Verify() const {
632 return isFile() && DbgNode->getNumOperands() == 2;
635 /// \brief Verify that the enumerator descriptor is well formed.
636 bool DIEnumerator::Verify() const {
637 return isEnumerator() && DbgNode->getNumOperands() == 3;
640 /// \brief Verify that the subrange descriptor is well formed.
641 bool DISubrange::Verify() const {
642 return isSubrange() && DbgNode->getNumOperands() == 3;
645 /// \brief Verify that the lexical block descriptor is well formed.
646 bool DILexicalBlock::Verify() const {
647 return isLexicalBlock() && DbgNode->getNumOperands() == 6;
650 /// \brief Verify that the file-scoped lexical block descriptor is well formed.
651 bool DILexicalBlockFile::Verify() const {
652 return isLexicalBlockFile() && DbgNode->getNumOperands() == 4;
655 /// \brief Verify that the template type parameter descriptor is well formed.
656 bool DITemplateTypeParameter::Verify() const {
657 return isTemplateTypeParameter() && DbgNode->getNumOperands() == 7;
660 /// \brief Verify that the template value parameter descriptor is well formed.
661 bool DITemplateValueParameter::Verify() const {
662 return isTemplateValueParameter() && DbgNode->getNumOperands() == 8;
665 /// \brief Verify that the imported module descriptor is well formed.
666 bool DIImportedEntity::Verify() const {
667 return isImportedEntity() &&
668 (DbgNode->getNumOperands() == 4 || DbgNode->getNumOperands() == 5);
671 /// getObjCProperty - Return property node, if this ivar is associated with one.
672 MDNode *DIDerivedType::getObjCProperty() const {
673 return getNodeField(DbgNode, 10);
676 MDString *DICompositeType::getIdentifier() const {
677 return cast_or_null<MDString>(getField(DbgNode, 14));
681 static void VerifySubsetOf(const MDNode *LHS, const MDNode *RHS) {
682 for (unsigned i = 0; i != LHS->getNumOperands(); ++i) {
683 // Skip the 'empty' list (that's a single i32 0, rather than truly empty).
684 if (i == 0 && isa<ConstantInt>(LHS->getOperand(i)))
686 const MDNode *E = cast<MDNode>(LHS->getOperand(i));
688 for (unsigned j = 0; !found && j != RHS->getNumOperands(); ++j)
689 found = E == RHS->getOperand(j);
690 assert(found && "Losing a member during member list replacement");
695 /// \brief Set the array of member DITypes.
696 void DICompositeType::setArraysHelper(MDNode *Elements, MDNode *TParams) {
697 TrackingVH<MDNode> N(*this);
700 // Check that the new list of members contains all the old members as well.
701 if (const MDNode *El = cast_or_null<MDNode>(N->getOperand(10)))
702 VerifySubsetOf(El, Elements);
704 N->replaceOperandWith(10, Elements);
707 N->replaceOperandWith(13, TParams);
711 /// Generate a reference to this DIType. Uses the type identifier instead
712 /// of the actual MDNode if possible, to help type uniquing.
713 DIScopeRef DIScope::getRef() const {
714 if (!isCompositeType())
715 return DIScopeRef(*this);
716 DICompositeType DTy(DbgNode);
717 if (!DTy.getIdentifier())
718 return DIScopeRef(*this);
719 return DIScopeRef(DTy.getIdentifier());
722 /// \brief Set the containing type.
723 void DICompositeType::setContainingType(DICompositeType ContainingType) {
724 TrackingVH<MDNode> N(*this);
725 N->replaceOperandWith(12, ContainingType.getRef());
729 /// isInlinedFnArgument - Return true if this variable provides debugging
730 /// information for an inlined function arguments.
731 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
732 assert(CurFn && "Invalid function");
733 if (!getContext().isSubprogram())
735 // This variable is not inlined function argument if its scope
736 // does not describe current function.
737 return !DISubprogram(getContext()).describes(CurFn);
740 /// describes - Return true if this subprogram provides debugging
741 /// information for the function F.
742 bool DISubprogram::describes(const Function *F) {
743 assert(F && "Invalid function");
744 if (F == getFunction())
746 StringRef Name = getLinkageName();
749 if (F->getName() == Name)
754 unsigned DISubprogram::isOptimized() const {
755 assert(DbgNode && "Invalid subprogram descriptor!");
756 if (DbgNode->getNumOperands() == 15)
757 return getUnsignedField(14);
761 MDNode *DISubprogram::getVariablesNodes() const {
762 return getNodeField(DbgNode, 18);
765 DIArray DISubprogram::getVariables() const {
766 return DIArray(getNodeField(DbgNode, 18));
769 Value *DITemplateValueParameter::getValue() const {
770 return getField(DbgNode, 4);
773 // If the current node has a parent scope then return that,
774 // else return an empty scope.
775 DIScopeRef DIScope::getContext() const {
778 return DIType(DbgNode).getContext();
781 return DIScopeRef(DISubprogram(DbgNode).getContext());
783 if (isLexicalBlock())
784 return DIScopeRef(DILexicalBlock(DbgNode).getContext());
786 if (isLexicalBlockFile())
787 return DIScopeRef(DILexicalBlockFile(DbgNode).getContext());
790 return DIScopeRef(DINameSpace(DbgNode).getContext());
792 assert((isFile() || isCompileUnit()) && "Unhandled type of scope.");
793 return DIScopeRef(nullptr);
796 // If the scope node has a name, return that, else return an empty string.
797 StringRef DIScope::getName() const {
799 return DIType(DbgNode).getName();
801 return DISubprogram(DbgNode).getName();
803 return DINameSpace(DbgNode).getName();
804 assert((isLexicalBlock() || isLexicalBlockFile() || isFile() ||
806 "Unhandled type of scope.");
810 StringRef DIScope::getFilename() const {
813 return ::getStringField(getNodeField(DbgNode, 1), 0);
816 StringRef DIScope::getDirectory() const {
819 return ::getStringField(getNodeField(DbgNode, 1), 1);
822 DIArray DICompileUnit::getEnumTypes() const {
823 if (!DbgNode || DbgNode->getNumOperands() < 13)
826 return DIArray(getNodeField(DbgNode, 7));
829 DIArray DICompileUnit::getRetainedTypes() const {
830 if (!DbgNode || DbgNode->getNumOperands() < 13)
833 return DIArray(getNodeField(DbgNode, 8));
836 DIArray DICompileUnit::getSubprograms() const {
837 if (!DbgNode || DbgNode->getNumOperands() < 13)
840 return DIArray(getNodeField(DbgNode, 9));
843 DIArray DICompileUnit::getGlobalVariables() const {
844 if (!DbgNode || DbgNode->getNumOperands() < 13)
847 return DIArray(getNodeField(DbgNode, 10));
850 DIArray DICompileUnit::getImportedEntities() const {
851 if (!DbgNode || DbgNode->getNumOperands() < 13)
854 return DIArray(getNodeField(DbgNode, 11));
857 /// copyWithNewScope - Return a copy of this location, replacing the
858 /// current scope with the given one.
859 DILocation DILocation::copyWithNewScope(LLVMContext &Ctx,
860 DILexicalBlockFile NewScope) {
861 SmallVector<Value *, 10> Elts;
863 for (unsigned I = 0; I < DbgNode->getNumOperands(); ++I) {
865 Elts.push_back(DbgNode->getOperand(I));
867 Elts.push_back(NewScope);
869 MDNode *NewDIL = MDNode::get(Ctx, Elts);
870 return DILocation(NewDIL);
873 /// computeNewDiscriminator - Generate a new discriminator value for this
874 /// file and line location.
875 unsigned DILocation::computeNewDiscriminator(LLVMContext &Ctx) {
876 std::pair<const char *, unsigned> Key(getFilename().data(), getLineNumber());
877 return ++Ctx.pImpl->DiscriminatorTable[Key];
880 /// fixupSubprogramName - Replace contains special characters used
881 /// in a typical Objective-C names with '.' in a given string.
882 static void fixupSubprogramName(DISubprogram Fn, SmallVectorImpl<char> &Out) {
884 Fn.getFunction() ? Fn.getFunction()->getName() : Fn.getName();
885 FName = Function::getRealLinkageName(FName);
887 StringRef Prefix("llvm.dbg.lv.");
888 Out.reserve(FName.size() + Prefix.size());
889 Out.append(Prefix.begin(), Prefix.end());
891 bool isObjCLike = false;
892 for (size_t i = 0, e = FName.size(); i < e; ++i) {
897 if (isObjCLike && (C == '[' || C == ']' || C == ' ' || C == ':' ||
898 C == '+' || C == '(' || C == ')'))
905 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
906 /// suitable to hold function specific information.
907 NamedMDNode *llvm::getFnSpecificMDNode(const Module &M, DISubprogram Fn) {
908 SmallString<32> Name;
909 fixupSubprogramName(Fn, Name);
910 return M.getNamedMetadata(Name.str());
913 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
914 /// to hold function specific information.
915 NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, DISubprogram Fn) {
916 SmallString<32> Name;
917 fixupSubprogramName(Fn, Name);
918 return M.getOrInsertNamedMetadata(Name.str());
921 /// createInlinedVariable - Create a new inlined variable based on current
923 /// @param DV Current Variable.
924 /// @param InlinedScope Location at current variable is inlined.
925 DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
926 LLVMContext &VMContext) {
927 SmallVector<Value *, 16> Elts;
928 // Insert inlined scope as 7th element.
929 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
930 i == 7 ? Elts.push_back(InlinedScope) : Elts.push_back(DV->getOperand(i));
931 return DIVariable(MDNode::get(VMContext, Elts));
934 /// cleanseInlinedVariable - Remove inlined scope from the variable.
935 DIVariable llvm::cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext) {
936 SmallVector<Value *, 16> Elts;
937 // Insert inlined scope as 7th element.
938 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
939 i == 7 ? Elts.push_back(Constant::getNullValue(Type::getInt32Ty(VMContext)))
940 : Elts.push_back(DV->getOperand(i));
941 return DIVariable(MDNode::get(VMContext, Elts));
944 /// getDISubprogram - Find subprogram that is enclosing this scope.
945 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
946 DIDescriptor D(Scope);
947 if (D.isSubprogram())
948 return DISubprogram(Scope);
950 if (D.isLexicalBlockFile())
951 return getDISubprogram(DILexicalBlockFile(Scope).getContext());
953 if (D.isLexicalBlock())
954 return getDISubprogram(DILexicalBlock(Scope).getContext());
956 return DISubprogram();
959 /// getDICompositeType - Find underlying composite type.
960 DICompositeType llvm::getDICompositeType(DIType T) {
961 if (T.isCompositeType())
962 return DICompositeType(T);
964 if (T.isDerivedType()) {
965 // This function is currently used by dragonegg and dragonegg does
966 // not generate identifier for types, so using an empty map to resolve
967 // DerivedFrom should be fine.
968 DITypeIdentifierMap EmptyMap;
969 return getDICompositeType(
970 DIDerivedType(T).getTypeDerivedFrom().resolve(EmptyMap));
973 return DICompositeType();
976 /// Update DITypeIdentifierMap by going through retained types of each CU.
978 llvm::generateDITypeIdentifierMap(const NamedMDNode *CU_Nodes) {
979 DITypeIdentifierMap Map;
980 for (unsigned CUi = 0, CUe = CU_Nodes->getNumOperands(); CUi != CUe; ++CUi) {
981 DICompileUnit CU(CU_Nodes->getOperand(CUi));
982 DIArray Retain = CU.getRetainedTypes();
983 for (unsigned Ti = 0, Te = Retain.getNumElements(); Ti != Te; ++Ti) {
984 if (!Retain.getElement(Ti).isCompositeType())
986 DICompositeType Ty(Retain.getElement(Ti));
987 if (MDString *TypeId = Ty.getIdentifier()) {
988 // Definition has priority over declaration.
989 // Try to insert (TypeId, Ty) to Map.
990 std::pair<DITypeIdentifierMap::iterator, bool> P =
991 Map.insert(std::make_pair(TypeId, Ty));
992 // If TypeId already exists in Map and this is a definition, replace
993 // whatever we had (declaration or definition) with the definition.
994 if (!P.second && !Ty.isForwardDecl())
995 P.first->second = Ty;
1002 //===----------------------------------------------------------------------===//
1003 // DebugInfoFinder implementations.
1004 //===----------------------------------------------------------------------===//
1006 void DebugInfoFinder::reset() {
1013 TypeIdentifierMap.clear();
1014 TypeMapInitialized = false;
1017 void DebugInfoFinder::InitializeTypeMap(const Module &M) {
1018 if (!TypeMapInitialized)
1019 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
1020 TypeIdentifierMap = generateDITypeIdentifierMap(CU_Nodes);
1021 TypeMapInitialized = true;
1025 /// processModule - Process entire module and collect debug info.
1026 void DebugInfoFinder::processModule(const Module &M) {
1027 InitializeTypeMap(M);
1028 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
1029 for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
1030 DICompileUnit CU(CU_Nodes->getOperand(i));
1032 DIArray GVs = CU.getGlobalVariables();
1033 for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) {
1034 DIGlobalVariable DIG(GVs.getElement(i));
1035 if (addGlobalVariable(DIG)) {
1036 processScope(DIG.getContext());
1037 processType(DIG.getType().resolve(TypeIdentifierMap));
1040 DIArray SPs = CU.getSubprograms();
1041 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
1042 processSubprogram(DISubprogram(SPs.getElement(i)));
1043 DIArray EnumTypes = CU.getEnumTypes();
1044 for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i)
1045 processType(DIType(EnumTypes.getElement(i)));
1046 DIArray RetainedTypes = CU.getRetainedTypes();
1047 for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
1048 processType(DIType(RetainedTypes.getElement(i)));
1049 DIArray Imports = CU.getImportedEntities();
1050 for (unsigned i = 0, e = Imports.getNumElements(); i != e; ++i) {
1051 DIImportedEntity Import = DIImportedEntity(Imports.getElement(i));
1052 DIDescriptor Entity = Import.getEntity().resolve(TypeIdentifierMap);
1053 if (Entity.isType())
1054 processType(DIType(Entity));
1055 else if (Entity.isSubprogram())
1056 processSubprogram(DISubprogram(Entity));
1057 else if (Entity.isNameSpace())
1058 processScope(DINameSpace(Entity).getContext());
1064 /// processLocation - Process DILocation.
1065 void DebugInfoFinder::processLocation(const Module &M, DILocation Loc) {
1068 InitializeTypeMap(M);
1069 processScope(Loc.getScope());
1070 processLocation(M, Loc.getOrigLocation());
1073 /// processType - Process DIType.
1074 void DebugInfoFinder::processType(DIType DT) {
1077 processScope(DT.getContext().resolve(TypeIdentifierMap));
1078 if (DT.isCompositeType()) {
1079 DICompositeType DCT(DT);
1080 processType(DCT.getTypeDerivedFrom().resolve(TypeIdentifierMap));
1081 if (DT.isSubroutineType()) {
1082 DITypeArray DTA = DISubroutineType(DT).getTypeArray();
1083 for (unsigned i = 0, e = DTA.getNumElements(); i != e; ++i)
1084 processType(DTA.getElement(i).resolve(TypeIdentifierMap));
1087 DIArray DA = DCT.getElements();
1088 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
1089 DIDescriptor D = DA.getElement(i);
1091 processType(DIType(D));
1092 else if (D.isSubprogram())
1093 processSubprogram(DISubprogram(D));
1095 } else if (DT.isDerivedType()) {
1096 DIDerivedType DDT(DT);
1097 processType(DDT.getTypeDerivedFrom().resolve(TypeIdentifierMap));
1101 void DebugInfoFinder::processScope(DIScope Scope) {
1102 if (Scope.isType()) {
1107 if (Scope.isCompileUnit()) {
1108 addCompileUnit(DICompileUnit(Scope));
1111 if (Scope.isSubprogram()) {
1112 processSubprogram(DISubprogram(Scope));
1115 if (!addScope(Scope))
1117 if (Scope.isLexicalBlock()) {
1118 DILexicalBlock LB(Scope);
1119 processScope(LB.getContext());
1120 } else if (Scope.isLexicalBlockFile()) {
1121 DILexicalBlockFile LBF = DILexicalBlockFile(Scope);
1122 processScope(LBF.getScope());
1123 } else if (Scope.isNameSpace()) {
1124 DINameSpace NS(Scope);
1125 processScope(NS.getContext());
1129 /// processSubprogram - Process DISubprogram.
1130 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
1131 if (!addSubprogram(SP))
1133 processScope(SP.getContext().resolve(TypeIdentifierMap));
1134 processType(SP.getType());
1135 DIArray TParams = SP.getTemplateParams();
1136 for (unsigned I = 0, E = TParams.getNumElements(); I != E; ++I) {
1137 DIDescriptor Element = TParams.getElement(I);
1138 if (Element.isTemplateTypeParameter()) {
1139 DITemplateTypeParameter TType(Element);
1140 processScope(TType.getContext().resolve(TypeIdentifierMap));
1141 processType(TType.getType().resolve(TypeIdentifierMap));
1142 } else if (Element.isTemplateValueParameter()) {
1143 DITemplateValueParameter TVal(Element);
1144 processScope(TVal.getContext().resolve(TypeIdentifierMap));
1145 processType(TVal.getType().resolve(TypeIdentifierMap));
1150 /// processDeclare - Process DbgDeclareInst.
1151 void DebugInfoFinder::processDeclare(const Module &M,
1152 const DbgDeclareInst *DDI) {
1153 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
1156 InitializeTypeMap(M);
1159 if (!DV.isVariable())
1162 if (!NodesSeen.insert(DV))
1164 processScope(DIVariable(N).getContext());
1165 processType(DIVariable(N).getType().resolve(TypeIdentifierMap));
1168 void DebugInfoFinder::processValue(const Module &M, const DbgValueInst *DVI) {
1169 MDNode *N = dyn_cast<MDNode>(DVI->getVariable());
1172 InitializeTypeMap(M);
1175 if (!DV.isVariable())
1178 if (!NodesSeen.insert(DV))
1180 processScope(DIVariable(N).getContext());
1181 processType(DIVariable(N).getType().resolve(TypeIdentifierMap));
1184 /// addType - Add type into Tys.
1185 bool DebugInfoFinder::addType(DIType DT) {
1189 if (!NodesSeen.insert(DT))
1196 /// addCompileUnit - Add compile unit into CUs.
1197 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
1200 if (!NodesSeen.insert(CU))
1207 /// addGlobalVariable - Add global variable into GVs.
1208 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
1212 if (!NodesSeen.insert(DIG))
1219 // addSubprogram - Add subprgoram into SPs.
1220 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1224 if (!NodesSeen.insert(SP))
1231 bool DebugInfoFinder::addScope(DIScope Scope) {
1234 // FIXME: Ocaml binding generates a scope with no content, we treat it
1236 if (Scope->getNumOperands() == 0)
1238 if (!NodesSeen.insert(Scope))
1240 Scopes.push_back(Scope);
1244 //===----------------------------------------------------------------------===//
1245 // DIDescriptor: dump routines for all descriptors.
1246 //===----------------------------------------------------------------------===//
1248 /// dump - Print descriptor to dbgs() with a newline.
1249 void DIDescriptor::dump() const {
1254 /// print - Print descriptor.
1255 void DIDescriptor::print(raw_ostream &OS) const {
1259 if (const char *Tag = dwarf::TagString(getTag()))
1260 OS << "[ " << Tag << " ]";
1262 if (this->isSubrange()) {
1263 DISubrange(DbgNode).printInternal(OS);
1264 } else if (this->isCompileUnit()) {
1265 DICompileUnit(DbgNode).printInternal(OS);
1266 } else if (this->isFile()) {
1267 DIFile(DbgNode).printInternal(OS);
1268 } else if (this->isEnumerator()) {
1269 DIEnumerator(DbgNode).printInternal(OS);
1270 } else if (this->isBasicType()) {
1271 DIType(DbgNode).printInternal(OS);
1272 } else if (this->isDerivedType()) {
1273 DIDerivedType(DbgNode).printInternal(OS);
1274 } else if (this->isCompositeType()) {
1275 DICompositeType(DbgNode).printInternal(OS);
1276 } else if (this->isSubprogram()) {
1277 DISubprogram(DbgNode).printInternal(OS);
1278 } else if (this->isGlobalVariable()) {
1279 DIGlobalVariable(DbgNode).printInternal(OS);
1280 } else if (this->isVariable()) {
1281 DIVariable(DbgNode).printInternal(OS);
1282 } else if (this->isObjCProperty()) {
1283 DIObjCProperty(DbgNode).printInternal(OS);
1284 } else if (this->isNameSpace()) {
1285 DINameSpace(DbgNode).printInternal(OS);
1286 } else if (this->isScope()) {
1287 DIScope(DbgNode).printInternal(OS);
1288 } else if (this->isExpression()) {
1289 DIExpression(DbgNode).printInternal(OS);
1293 void DISubrange::printInternal(raw_ostream &OS) const {
1294 int64_t Count = getCount();
1296 OS << " [" << getLo() << ", " << Count - 1 << ']';
1298 OS << " [unbounded]";
1301 void DIScope::printInternal(raw_ostream &OS) const {
1302 OS << " [" << getDirectory() << "/" << getFilename() << ']';
1305 void DICompileUnit::printInternal(raw_ostream &OS) const {
1306 DIScope::printInternal(OS);
1308 unsigned Lang = getLanguage();
1309 if (const char *LangStr = dwarf::LanguageString(Lang))
1312 (OS << "lang 0x").write_hex(Lang);
1316 void DIEnumerator::printInternal(raw_ostream &OS) const {
1317 OS << " [" << getName() << " :: " << getEnumValue() << ']';
1320 void DIType::printInternal(raw_ostream &OS) const {
1324 StringRef Res = getName();
1326 OS << " [" << Res << "]";
1328 // TODO: Print context?
1330 OS << " [line " << getLineNumber() << ", size " << getSizeInBits()
1331 << ", align " << getAlignInBits() << ", offset " << getOffsetInBits();
1333 if (const char *Enc =
1334 dwarf::AttributeEncodingString(DIBasicType(DbgNode).getEncoding()))
1335 OS << ", enc " << Enc;
1340 else if (isProtected())
1341 OS << " [protected]";
1342 else if (isPublic())
1346 OS << " [artificial]";
1348 if (isForwardDecl())
1350 else if (getTag() == dwarf::DW_TAG_structure_type ||
1351 getTag() == dwarf::DW_TAG_union_type ||
1352 getTag() == dwarf::DW_TAG_enumeration_type ||
1353 getTag() == dwarf::DW_TAG_class_type)
1357 if (isStaticMember())
1360 if (isLValueReference())
1361 OS << " [reference]";
1363 if (isRValueReference())
1364 OS << " [rvalue reference]";
1367 void DIDerivedType::printInternal(raw_ostream &OS) const {
1368 DIType::printInternal(OS);
1369 OS << " [from " << getTypeDerivedFrom().getName() << ']';
1372 void DICompositeType::printInternal(raw_ostream &OS) const {
1373 DIType::printInternal(OS);
1374 DIArray A = getElements();
1375 OS << " [" << A.getNumElements() << " elements]";
1378 void DINameSpace::printInternal(raw_ostream &OS) const {
1379 StringRef Name = getName();
1381 OS << " [" << Name << ']';
1383 OS << " [line " << getLineNumber() << ']';
1386 void DISubprogram::printInternal(raw_ostream &OS) const {
1387 // TODO : Print context
1388 OS << " [line " << getLineNumber() << ']';
1390 if (isLocalToUnit())
1396 if (getScopeLineNumber() != getLineNumber())
1397 OS << " [scope " << getScopeLineNumber() << "]";
1401 else if (isProtected())
1402 OS << " [protected]";
1403 else if (isPublic())
1406 if (isLValueReference())
1407 OS << " [reference]";
1409 if (isRValueReference())
1410 OS << " [rvalue reference]";
1412 StringRef Res = getName();
1414 OS << " [" << Res << ']';
1417 void DIGlobalVariable::printInternal(raw_ostream &OS) const {
1418 StringRef Res = getName();
1420 OS << " [" << Res << ']';
1422 OS << " [line " << getLineNumber() << ']';
1424 // TODO : Print context
1426 if (isLocalToUnit())
1433 void DIVariable::printInternal(raw_ostream &OS) const {
1434 StringRef Res = getName();
1436 OS << " [" << Res << ']';
1438 OS << " [line " << getLineNumber() << ']';
1441 void DIExpression::printInternal(raw_ostream &OS) const {
1442 for (unsigned I = 0; I < getNumElements(); ++I) {
1443 uint64_t OpCode = getElement(I);
1444 OS << " [" << OperationEncodingString(OpCode);
1447 OS << " " << getElement(++I);
1451 unsigned Offset = getElement(++I);
1452 unsigned Size = getElement(++I);
1453 OS << " offset=" << Offset << ", size= " << Size;
1463 void DIObjCProperty::printInternal(raw_ostream &OS) const {
1464 StringRef Name = getObjCPropertyName();
1466 OS << " [" << Name << ']';
1468 OS << " [line " << getLineNumber() << ", properties " << getUnsignedField(6)
1472 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
1473 const LLVMContext &Ctx) {
1474 if (!DL.isUnknown()) { // Print source line info.
1475 DIScope Scope(DL.getScope(Ctx));
1476 assert(Scope.isScope() && "Scope of a DebugLoc should be a DIScope.");
1477 // Omit the directory, because it's likely to be long and uninteresting.
1478 CommentOS << Scope.getFilename();
1479 CommentOS << ':' << DL.getLine();
1480 if (DL.getCol() != 0)
1481 CommentOS << ':' << DL.getCol();
1482 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx));
1483 if (!InlinedAtDL.isUnknown()) {
1484 CommentOS << " @[ ";
1485 printDebugLoc(InlinedAtDL, CommentOS, Ctx);
1491 void DIVariable::printExtendedName(raw_ostream &OS) const {
1492 const LLVMContext &Ctx = DbgNode->getContext();
1493 StringRef Res = getName();
1495 OS << Res << "," << getLineNumber();
1496 if (MDNode *InlinedAt = getInlinedAt()) {
1497 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(InlinedAt);
1498 if (!InlinedAtDL.isUnknown()) {
1500 printDebugLoc(InlinedAtDL, OS, Ctx);
1506 /// Specialize constructor to make sure it has the correct type.
1507 template <> DIRef<DIScope>::DIRef(const Value *V) : Val(V) {
1508 assert(isScopeRef(V) && "DIScopeRef should be a MDString or MDNode");
1510 template <> DIRef<DIType>::DIRef(const Value *V) : Val(V) {
1511 assert(isTypeRef(V) && "DITypeRef should be a MDString or MDNode");
1514 /// Specialize getFieldAs to handle fields that are references to DIScopes.
1516 DIScopeRef DIDescriptor::getFieldAs<DIScopeRef>(unsigned Elt) const {
1517 return DIScopeRef(getField(DbgNode, Elt));
1519 /// Specialize getFieldAs to handle fields that are references to DITypes.
1520 template <> DITypeRef DIDescriptor::getFieldAs<DITypeRef>(unsigned Elt) const {
1521 return DITypeRef(getField(DbgNode, Elt));
1524 /// Strip debug info in the module if it exists.
1525 /// To do this, we remove all calls to the debugger intrinsics and any named
1526 /// metadata for debugging. We also remove debug locations for instructions.
1527 /// Return true if module is modified.
1528 bool llvm::StripDebugInfo(Module &M) {
1530 bool Changed = false;
1532 // Remove all of the calls to the debugger intrinsics, and remove them from
1534 if (Function *Declare = M.getFunction("llvm.dbg.declare")) {
1535 while (!Declare->use_empty()) {
1536 CallInst *CI = cast<CallInst>(Declare->user_back());
1537 CI->eraseFromParent();
1539 Declare->eraseFromParent();
1543 if (Function *DbgVal = M.getFunction("llvm.dbg.value")) {
1544 while (!DbgVal->use_empty()) {
1545 CallInst *CI = cast<CallInst>(DbgVal->user_back());
1546 CI->eraseFromParent();
1548 DbgVal->eraseFromParent();
1552 for (Module::named_metadata_iterator NMI = M.named_metadata_begin(),
1553 NME = M.named_metadata_end(); NMI != NME;) {
1554 NamedMDNode *NMD = NMI;
1556 if (NMD->getName().startswith("llvm.dbg.")) {
1557 NMD->eraseFromParent();
1562 for (Module::iterator MI = M.begin(), ME = M.end(); MI != ME; ++MI)
1563 for (Function::iterator FI = MI->begin(), FE = MI->end(); FI != FE;
1565 for (BasicBlock::iterator BI = FI->begin(), BE = FI->end(); BI != BE;
1567 if (!BI->getDebugLoc().isUnknown()) {
1569 BI->setDebugLoc(DebugLoc());
1576 /// Return Debug Info Metadata Version by checking module flags.
1577 unsigned llvm::getDebugMetadataVersionFromModule(const Module &M) {
1578 Value *Val = M.getModuleFlag("Debug Info Version");
1581 return cast<ConstantInt>(Val)->getZExtValue();
1584 llvm::DenseMap<const llvm::Function *, llvm::DISubprogram>
1585 llvm::makeSubprogramMap(const Module &M) {
1586 DenseMap<const Function *, DISubprogram> R;
1588 NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu");
1592 for (MDNode *N : CU_Nodes->operands()) {
1593 DICompileUnit CUNode(N);
1594 DIArray SPs = CUNode.getSubprograms();
1595 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i) {
1596 DISubprogram SP(SPs.getElement(i));
1597 if (Function *F = SP.getFunction())
1598 R.insert(std::make_pair(F, SP));