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/DerivedTypes.h"
23 #include "llvm/IR/Instructions.h"
24 #include "llvm/IR/IntrinsicInst.h"
25 #include "llvm/IR/Intrinsics.h"
26 #include "llvm/IR/Module.h"
27 #include "llvm/IR/ValueHandle.h"
28 #include "llvm/Support/Debug.h"
29 #include "llvm/Support/Dwarf.h"
30 #include "llvm/Support/raw_ostream.h"
32 using namespace llvm::dwarf;
34 //===----------------------------------------------------------------------===//
36 //===----------------------------------------------------------------------===//
38 bool DIDescriptor::Verify() const {
40 (DIDerivedType(DbgNode).Verify() ||
41 DICompositeType(DbgNode).Verify() || DIBasicType(DbgNode).Verify() ||
42 DIVariable(DbgNode).Verify() || DISubprogram(DbgNode).Verify() ||
43 DIGlobalVariable(DbgNode).Verify() || DIFile(DbgNode).Verify() ||
44 DICompileUnit(DbgNode).Verify() || DINameSpace(DbgNode).Verify() ||
45 DILexicalBlock(DbgNode).Verify() ||
46 DILexicalBlockFile(DbgNode).Verify() ||
47 DISubrange(DbgNode).Verify() || DIEnumerator(DbgNode).Verify() ||
48 DIObjCProperty(DbgNode).Verify() ||
49 DIUnspecifiedParameter(DbgNode).Verify() ||
50 DITemplateTypeParameter(DbgNode).Verify() ||
51 DITemplateValueParameter(DbgNode).Verify() ||
52 DIImportedEntity(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 unsigned DIVariable::getNumAddrElements() const {
142 return DbgNode->getNumOperands() - 8;
145 /// getInlinedAt - If this variable is inlined then return inline location.
146 MDNode *DIVariable::getInlinedAt() const { return getNodeField(DbgNode, 7); }
148 //===----------------------------------------------------------------------===//
150 //===----------------------------------------------------------------------===//
152 /// isBasicType - Return true if the specified tag is legal for
154 bool DIDescriptor::isBasicType() const {
158 case dwarf::DW_TAG_base_type:
159 case dwarf::DW_TAG_unspecified_type:
166 /// isDerivedType - Return true if the specified tag is legal for DIDerivedType.
167 bool DIDescriptor::isDerivedType() const {
171 case dwarf::DW_TAG_typedef:
172 case dwarf::DW_TAG_pointer_type:
173 case dwarf::DW_TAG_ptr_to_member_type:
174 case dwarf::DW_TAG_reference_type:
175 case dwarf::DW_TAG_rvalue_reference_type:
176 case dwarf::DW_TAG_const_type:
177 case dwarf::DW_TAG_volatile_type:
178 case dwarf::DW_TAG_restrict_type:
179 case dwarf::DW_TAG_member:
180 case dwarf::DW_TAG_inheritance:
181 case dwarf::DW_TAG_friend:
184 // CompositeTypes are currently modelled as DerivedTypes.
185 return isCompositeType();
189 /// isCompositeType - Return true if the specified tag is legal for
191 bool DIDescriptor::isCompositeType() const {
195 case dwarf::DW_TAG_array_type:
196 case dwarf::DW_TAG_structure_type:
197 case dwarf::DW_TAG_union_type:
198 case dwarf::DW_TAG_enumeration_type:
199 case dwarf::DW_TAG_subroutine_type:
200 case dwarf::DW_TAG_class_type:
207 /// isVariable - Return true if the specified tag is legal for DIVariable.
208 bool DIDescriptor::isVariable() const {
212 case dwarf::DW_TAG_auto_variable:
213 case dwarf::DW_TAG_arg_variable:
220 /// isType - Return true if the specified tag is legal for DIType.
221 bool DIDescriptor::isType() const {
222 return isBasicType() || isCompositeType() || isDerivedType();
225 /// isSubprogram - Return true if the specified tag is legal for
227 bool DIDescriptor::isSubprogram() const {
228 return DbgNode && getTag() == dwarf::DW_TAG_subprogram;
231 /// isGlobalVariable - Return true if the specified tag is legal for
232 /// DIGlobalVariable.
233 bool DIDescriptor::isGlobalVariable() const {
234 return DbgNode && (getTag() == dwarf::DW_TAG_variable ||
235 getTag() == dwarf::DW_TAG_constant);
238 /// isUnspecifiedParmeter - Return true if the specified tag is
239 /// DW_TAG_unspecified_parameters.
240 bool DIDescriptor::isUnspecifiedParameter() const {
241 return DbgNode && getTag() == dwarf::DW_TAG_unspecified_parameters;
244 /// isScope - Return true if the specified tag is one of the scope
246 bool DIDescriptor::isScope() const {
250 case dwarf::DW_TAG_compile_unit:
251 case dwarf::DW_TAG_lexical_block:
252 case dwarf::DW_TAG_subprogram:
253 case dwarf::DW_TAG_namespace:
254 case dwarf::DW_TAG_file_type:
262 /// isTemplateTypeParameter - Return true if the specified tag is
263 /// DW_TAG_template_type_parameter.
264 bool DIDescriptor::isTemplateTypeParameter() const {
265 return DbgNode && getTag() == dwarf::DW_TAG_template_type_parameter;
268 /// isTemplateValueParameter - Return true if the specified tag is
269 /// DW_TAG_template_value_parameter.
270 bool DIDescriptor::isTemplateValueParameter() const {
271 return DbgNode && (getTag() == dwarf::DW_TAG_template_value_parameter ||
272 getTag() == dwarf::DW_TAG_GNU_template_template_param ||
273 getTag() == dwarf::DW_TAG_GNU_template_parameter_pack);
276 /// isCompileUnit - Return true if the specified tag is DW_TAG_compile_unit.
277 bool DIDescriptor::isCompileUnit() const {
278 return DbgNode && getTag() == dwarf::DW_TAG_compile_unit;
281 /// isFile - Return true if the specified tag is DW_TAG_file_type.
282 bool DIDescriptor::isFile() const {
283 return DbgNode && getTag() == dwarf::DW_TAG_file_type;
286 /// isNameSpace - Return true if the specified tag is DW_TAG_namespace.
287 bool DIDescriptor::isNameSpace() const {
288 return DbgNode && getTag() == dwarf::DW_TAG_namespace;
291 /// isLexicalBlockFile - Return true if the specified descriptor is a
292 /// lexical block with an extra file.
293 bool DIDescriptor::isLexicalBlockFile() const {
294 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
295 (DbgNode->getNumOperands() == 3);
298 /// isLexicalBlock - Return true if the specified tag is DW_TAG_lexical_block.
299 bool DIDescriptor::isLexicalBlock() const {
300 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
301 (DbgNode->getNumOperands() > 3);
304 /// isSubrange - Return true if the specified tag is DW_TAG_subrange_type.
305 bool DIDescriptor::isSubrange() const {
306 return DbgNode && getTag() == dwarf::DW_TAG_subrange_type;
309 /// isEnumerator - Return true if the specified tag is DW_TAG_enumerator.
310 bool DIDescriptor::isEnumerator() const {
311 return DbgNode && getTag() == dwarf::DW_TAG_enumerator;
314 /// isObjCProperty - Return true if the specified tag is DW_TAG_APPLE_property.
315 bool DIDescriptor::isObjCProperty() const {
316 return DbgNode && getTag() == dwarf::DW_TAG_APPLE_property;
319 /// \brief Return true if the specified tag is DW_TAG_imported_module or
320 /// DW_TAG_imported_declaration.
321 bool DIDescriptor::isImportedEntity() const {
322 return DbgNode && (getTag() == dwarf::DW_TAG_imported_module ||
323 getTag() == dwarf::DW_TAG_imported_declaration);
326 //===----------------------------------------------------------------------===//
327 // Simple Descriptor Constructors and other Methods
328 //===----------------------------------------------------------------------===//
330 unsigned DIArray::getNumElements() const {
333 return DbgNode->getNumOperands();
336 /// replaceAllUsesWith - Replace all uses of the MDNode used by this
337 /// type with the one in the passed descriptor.
338 void DIType::replaceAllUsesWith(DIDescriptor &D) {
340 assert(DbgNode && "Trying to replace an unverified type!");
342 // Since we use a TrackingVH for the node, its easy for clients to manufacture
343 // legitimate situations where they want to replaceAllUsesWith() on something
344 // which, due to uniquing, has merged with the source. We shield clients from
345 // this detail by allowing a value to be replaced with replaceAllUsesWith()
348 MDNode *Node = const_cast<MDNode *>(DbgNode);
349 const MDNode *DN = D;
350 const Value *V = cast_or_null<Value>(DN);
351 Node->replaceAllUsesWith(const_cast<Value *>(V));
352 MDNode::deleteTemporary(Node);
356 /// replaceAllUsesWith - Replace all uses of the MDNode used by this
357 /// type with the one in D.
358 void DIType::replaceAllUsesWith(MDNode *D) {
360 assert(DbgNode && "Trying to replace an unverified type!");
362 // Since we use a TrackingVH for the node, its easy for clients to manufacture
363 // legitimate situations where they want to replaceAllUsesWith() on something
364 // which, due to uniquing, has merged with the source. We shield clients from
365 // this detail by allowing a value to be replaced with replaceAllUsesWith()
368 MDNode *Node = const_cast<MDNode *>(DbgNode);
369 const MDNode *DN = D;
370 const Value *V = cast_or_null<Value>(DN);
371 Node->replaceAllUsesWith(const_cast<Value *>(V));
372 MDNode::deleteTemporary(Node);
376 /// Verify - Verify that a compile unit is well formed.
377 bool DICompileUnit::Verify() const {
378 if (!isCompileUnit())
381 // Don't bother verifying the compilation directory or producer string
382 // as those could be empty.
383 if (getFilename().empty())
386 return DbgNode->getNumOperands() == 14;
389 /// Verify - Verify that an ObjC property is well formed.
390 bool DIObjCProperty::Verify() const {
391 if (!isObjCProperty())
394 // Don't worry about the rest of the strings for now.
395 return DbgNode->getNumOperands() == 8;
398 /// Check if a field at position Elt of a MDNode is a MDNode.
399 /// We currently allow an empty string and an integer.
400 /// But we don't allow a non-empty string in a MDNode field.
401 static bool fieldIsMDNode(const MDNode *DbgNode, unsigned Elt) {
402 // FIXME: This function should return true, if the field is null or the field
403 // is indeed a MDNode: return !Fld || isa<MDNode>(Fld).
404 Value *Fld = getField(DbgNode, Elt);
405 if (Fld && isa<MDString>(Fld) && !cast<MDString>(Fld)->getString().empty())
410 /// Check if a field at position Elt of a MDNode is a MDString.
411 static bool fieldIsMDString(const MDNode *DbgNode, unsigned Elt) {
412 Value *Fld = getField(DbgNode, Elt);
413 return !Fld || isa<MDString>(Fld);
416 /// Check if a value can be a reference to a type.
417 static bool isTypeRef(const Value *Val) {
419 (isa<MDString>(Val) && !cast<MDString>(Val)->getString().empty()) ||
420 (isa<MDNode>(Val) && DIType(cast<MDNode>(Val)).isType());
423 /// Check if a field at position Elt of a MDNode can be a reference to a type.
424 static bool fieldIsTypeRef(const MDNode *DbgNode, unsigned Elt) {
425 Value *Fld = getField(DbgNode, Elt);
426 return isTypeRef(Fld);
429 /// Check if a value can be a ScopeRef.
430 static bool isScopeRef(const Value *Val) {
432 (isa<MDString>(Val) && !cast<MDString>(Val)->getString().empty()) ||
433 // Not checking for Val->isScope() here, because it would work
434 // only for lexical scopes and not all subclasses of DIScope.
438 /// Check if a field at position Elt of a MDNode can be a ScopeRef.
439 static bool fieldIsScopeRef(const MDNode *DbgNode, unsigned Elt) {
440 Value *Fld = getField(DbgNode, Elt);
441 return isScopeRef(Fld);
444 /// Verify - Verify that a type descriptor is well formed.
445 bool DIType::Verify() const {
448 // Make sure Context @ field 2 is MDNode.
449 if (!fieldIsScopeRef(DbgNode, 2))
452 // FIXME: Sink this into the various subclass verifies.
453 uint16_t Tag = getTag();
454 if (!isBasicType() && Tag != dwarf::DW_TAG_const_type &&
455 Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
456 Tag != dwarf::DW_TAG_ptr_to_member_type &&
457 Tag != dwarf::DW_TAG_reference_type &&
458 Tag != dwarf::DW_TAG_rvalue_reference_type &&
459 Tag != dwarf::DW_TAG_restrict_type && Tag != dwarf::DW_TAG_array_type &&
460 Tag != dwarf::DW_TAG_enumeration_type &&
461 Tag != dwarf::DW_TAG_subroutine_type &&
462 Tag != dwarf::DW_TAG_inheritance && Tag != dwarf::DW_TAG_friend &&
463 getFilename().empty())
465 // DIType is abstract, it should be a BasicType, a DerivedType or
468 return DIBasicType(DbgNode).Verify();
469 else if (isCompositeType())
470 return DICompositeType(DbgNode).Verify();
471 else if (isDerivedType())
472 return DIDerivedType(DbgNode).Verify();
477 /// Verify - Verify that a basic type descriptor is well formed.
478 bool DIBasicType::Verify() const {
479 return isBasicType() && DbgNode->getNumOperands() == 10;
482 /// Verify - Verify that a derived type descriptor is well formed.
483 bool DIDerivedType::Verify() const {
484 // Make sure DerivedFrom @ field 9 is TypeRef.
485 if (!fieldIsTypeRef(DbgNode, 9))
487 if (getTag() == dwarf::DW_TAG_ptr_to_member_type)
488 // Make sure ClassType @ field 10 is a TypeRef.
489 if (!fieldIsTypeRef(DbgNode, 10))
492 return isDerivedType() && DbgNode->getNumOperands() >= 10 &&
493 DbgNode->getNumOperands() <= 14;
496 /// Verify - Verify that a composite type descriptor is well formed.
497 bool DICompositeType::Verify() const {
498 if (!isCompositeType())
501 // Make sure DerivedFrom @ field 9 and ContainingType @ field 12 are TypeRef.
502 if (!fieldIsTypeRef(DbgNode, 9))
504 if (!fieldIsTypeRef(DbgNode, 12))
507 // Make sure the type identifier at field 14 is MDString, it can be null.
508 if (!fieldIsMDString(DbgNode, 14))
511 // A subroutine type can't be both & and &&.
512 if (isLValueReference() && isRValueReference())
515 return DbgNode->getNumOperands() == 15;
518 /// Verify - Verify that a subprogram descriptor is well formed.
519 bool DISubprogram::Verify() const {
523 // Make sure context @ field 2 is a ScopeRef and type @ field 7 is a MDNode.
524 if (!fieldIsScopeRef(DbgNode, 2))
526 if (!fieldIsMDNode(DbgNode, 7))
528 // Containing type @ field 12.
529 if (!fieldIsTypeRef(DbgNode, 12))
532 // A subprogram can't be both & and &&.
533 if (isLValueReference() && isRValueReference())
536 return DbgNode->getNumOperands() == 20;
539 /// Verify - Verify that a global variable descriptor is well formed.
540 bool DIGlobalVariable::Verify() const {
541 if (!isGlobalVariable())
544 if (getDisplayName().empty())
546 // Make sure context @ field 2 is an MDNode.
547 if (!fieldIsMDNode(DbgNode, 2))
549 // Make sure that type @ field 8 is a DITypeRef.
550 if (!fieldIsTypeRef(DbgNode, 8))
552 // Make sure StaticDataMemberDeclaration @ field 12 is MDNode.
553 if (!fieldIsMDNode(DbgNode, 12))
556 return DbgNode->getNumOperands() == 13;
559 /// Verify - Verify that a variable descriptor is well formed.
560 bool DIVariable::Verify() const {
564 // Make sure context @ field 1 is an MDNode.
565 if (!fieldIsMDNode(DbgNode, 1))
567 // Make sure that type @ field 5 is a DITypeRef.
568 if (!fieldIsTypeRef(DbgNode, 5))
570 return DbgNode->getNumOperands() >= 8;
573 /// Verify - Verify that a location descriptor is well formed.
574 bool DILocation::Verify() const {
578 return DbgNode->getNumOperands() == 4;
581 /// Verify - Verify that a namespace descriptor is well formed.
582 bool DINameSpace::Verify() const {
585 return DbgNode->getNumOperands() == 5;
588 /// \brief Retrieve the MDNode for the directory/file pair.
589 MDNode *DIFile::getFileNode() const { return getNodeField(DbgNode, 1); }
591 /// \brief Verify that the file descriptor is well formed.
592 bool DIFile::Verify() const {
593 return isFile() && DbgNode->getNumOperands() == 2;
596 /// \brief Verify that the enumerator descriptor is well formed.
597 bool DIEnumerator::Verify() const {
598 return isEnumerator() && DbgNode->getNumOperands() == 3;
601 /// \brief Verify that the subrange descriptor is well formed.
602 bool DISubrange::Verify() const {
603 return isSubrange() && DbgNode->getNumOperands() == 3;
606 /// \brief Verify that the lexical block descriptor is well formed.
607 bool DILexicalBlock::Verify() const {
608 return isLexicalBlock() && DbgNode->getNumOperands() == 7;
611 /// \brief Verify that the file-scoped lexical block descriptor is well formed.
612 bool DILexicalBlockFile::Verify() const {
613 return isLexicalBlockFile() && DbgNode->getNumOperands() == 3;
616 /// \brief Verify that an unspecified parameter descriptor is well formed.
617 bool DIUnspecifiedParameter::Verify() const {
618 return isUnspecifiedParameter() && DbgNode->getNumOperands() == 1;
621 /// \brief Verify that the template type parameter descriptor is well formed.
622 bool DITemplateTypeParameter::Verify() const {
623 return isTemplateTypeParameter() && DbgNode->getNumOperands() == 7;
626 /// \brief Verify that the template value parameter descriptor is well formed.
627 bool DITemplateValueParameter::Verify() const {
628 return isTemplateValueParameter() && DbgNode->getNumOperands() == 8;
631 /// \brief Verify that the imported module descriptor is well formed.
632 bool DIImportedEntity::Verify() const {
633 return isImportedEntity() &&
634 (DbgNode->getNumOperands() == 4 || DbgNode->getNumOperands() == 5);
637 /// getObjCProperty - Return property node, if this ivar is associated with one.
638 MDNode *DIDerivedType::getObjCProperty() const {
639 return getNodeField(DbgNode, 10);
642 MDString *DICompositeType::getIdentifier() const {
643 return cast_or_null<MDString>(getField(DbgNode, 14));
647 static void VerifySubsetOf(const MDNode *LHS, const MDNode *RHS) {
648 for (unsigned i = 0; i != LHS->getNumOperands(); ++i) {
649 // Skip the 'empty' list (that's a single i32 0, rather than truly empty).
650 if (i == 0 && isa<ConstantInt>(LHS->getOperand(i)))
652 const MDNode *E = cast<MDNode>(LHS->getOperand(i));
654 for (unsigned j = 0; !found && j != RHS->getNumOperands(); ++j)
655 found = E == RHS->getOperand(j);
656 assert(found && "Losing a member during member list replacement");
661 /// \brief Set the array of member DITypes.
662 void DICompositeType::setTypeArray(DIArray Elements, DIArray TParams) {
663 assert((!TParams || DbgNode->getNumOperands() == 15) &&
664 "If you're setting the template parameters this should include a slot "
666 TrackingVH<MDNode> N(*this);
669 // Check that the new list of members contains all the old members as well.
670 if (const MDNode *El = cast_or_null<MDNode>(N->getOperand(10)))
671 VerifySubsetOf(El, Elements);
673 N->replaceOperandWith(10, Elements);
676 N->replaceOperandWith(13, TParams);
680 /// Generate a reference to this DIType. Uses the type identifier instead
681 /// of the actual MDNode if possible, to help type uniquing.
682 DIScopeRef DIScope::getRef() const {
683 if (!isCompositeType())
684 return DIScopeRef(*this);
685 DICompositeType DTy(DbgNode);
686 if (!DTy.getIdentifier())
687 return DIScopeRef(*this);
688 return DIScopeRef(DTy.getIdentifier());
691 /// \brief Set the containing type.
692 void DICompositeType::setContainingType(DICompositeType ContainingType) {
693 TrackingVH<MDNode> N(*this);
694 N->replaceOperandWith(12, ContainingType.getRef());
698 /// isInlinedFnArgument - Return true if this variable provides debugging
699 /// information for an inlined function arguments.
700 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
701 assert(CurFn && "Invalid function");
702 if (!getContext().isSubprogram())
704 // This variable is not inlined function argument if its scope
705 // does not describe current function.
706 return !DISubprogram(getContext()).describes(CurFn);
709 /// describes - Return true if this subprogram provides debugging
710 /// information for the function F.
711 bool DISubprogram::describes(const Function *F) {
712 assert(F && "Invalid function");
713 if (F == getFunction())
715 StringRef Name = getLinkageName();
718 if (F->getName() == Name)
723 unsigned DISubprogram::isOptimized() const {
724 assert(DbgNode && "Invalid subprogram descriptor!");
725 if (DbgNode->getNumOperands() == 15)
726 return getUnsignedField(14);
730 MDNode *DISubprogram::getVariablesNodes() const {
731 return getNodeField(DbgNode, 18);
734 DIArray DISubprogram::getVariables() const {
735 return DIArray(getNodeField(DbgNode, 18));
738 Value *DITemplateValueParameter::getValue() const {
739 return getField(DbgNode, 4);
742 // If the current node has a parent scope then return that,
743 // else return an empty scope.
744 DIScopeRef DIScope::getContext() const {
747 return DIType(DbgNode).getContext();
750 return DIScopeRef(DISubprogram(DbgNode).getContext());
752 if (isLexicalBlock())
753 return DIScopeRef(DILexicalBlock(DbgNode).getContext());
755 if (isLexicalBlockFile())
756 return DIScopeRef(DILexicalBlockFile(DbgNode).getContext());
759 return DIScopeRef(DINameSpace(DbgNode).getContext());
761 assert((isFile() || isCompileUnit()) && "Unhandled type of scope.");
762 return DIScopeRef(nullptr);
765 // If the scope node has a name, return that, else return an empty string.
766 StringRef DIScope::getName() const {
768 return DIType(DbgNode).getName();
770 return DISubprogram(DbgNode).getName();
772 return DINameSpace(DbgNode).getName();
773 assert((isLexicalBlock() || isLexicalBlockFile() || isFile() ||
775 "Unhandled type of scope.");
779 StringRef DIScope::getFilename() const {
782 return ::getStringField(getNodeField(DbgNode, 1), 0);
785 StringRef DIScope::getDirectory() const {
788 return ::getStringField(getNodeField(DbgNode, 1), 1);
791 DIArray DICompileUnit::getEnumTypes() const {
792 if (!DbgNode || DbgNode->getNumOperands() < 13)
795 return DIArray(getNodeField(DbgNode, 7));
798 DIArray DICompileUnit::getRetainedTypes() const {
799 if (!DbgNode || DbgNode->getNumOperands() < 13)
802 return DIArray(getNodeField(DbgNode, 8));
805 DIArray DICompileUnit::getSubprograms() const {
806 if (!DbgNode || DbgNode->getNumOperands() < 13)
809 return DIArray(getNodeField(DbgNode, 9));
812 DIArray DICompileUnit::getGlobalVariables() const {
813 if (!DbgNode || DbgNode->getNumOperands() < 13)
816 return DIArray(getNodeField(DbgNode, 10));
819 DIArray DICompileUnit::getImportedEntities() const {
820 if (!DbgNode || DbgNode->getNumOperands() < 13)
823 return DIArray(getNodeField(DbgNode, 11));
826 /// copyWithNewScope - Return a copy of this location, replacing the
827 /// current scope with the given one.
828 DILocation DILocation::copyWithNewScope(LLVMContext &Ctx,
829 DILexicalBlock NewScope) {
830 SmallVector<Value *, 10> Elts;
832 for (unsigned I = 0; I < DbgNode->getNumOperands(); ++I) {
834 Elts.push_back(DbgNode->getOperand(I));
836 Elts.push_back(NewScope);
838 MDNode *NewDIL = MDNode::get(Ctx, Elts);
839 return DILocation(NewDIL);
842 /// computeNewDiscriminator - Generate a new discriminator value for this
843 /// file and line location.
844 unsigned DILocation::computeNewDiscriminator(LLVMContext &Ctx) {
845 std::pair<const char *, unsigned> Key(getFilename().data(), getLineNumber());
846 return ++Ctx.pImpl->DiscriminatorTable[Key];
849 /// fixupSubprogramName - Replace contains special characters used
850 /// in a typical Objective-C names with '.' in a given string.
851 static void fixupSubprogramName(DISubprogram Fn, SmallVectorImpl<char> &Out) {
853 Fn.getFunction() ? Fn.getFunction()->getName() : Fn.getName();
854 FName = Function::getRealLinkageName(FName);
856 StringRef Prefix("llvm.dbg.lv.");
857 Out.reserve(FName.size() + Prefix.size());
858 Out.append(Prefix.begin(), Prefix.end());
860 bool isObjCLike = false;
861 for (size_t i = 0, e = FName.size(); i < e; ++i) {
866 if (isObjCLike && (C == '[' || C == ']' || C == ' ' || C == ':' ||
867 C == '+' || C == '(' || C == ')'))
874 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
875 /// suitable to hold function specific information.
876 NamedMDNode *llvm::getFnSpecificMDNode(const Module &M, DISubprogram Fn) {
877 SmallString<32> Name;
878 fixupSubprogramName(Fn, Name);
879 return M.getNamedMetadata(Name.str());
882 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
883 /// to hold function specific information.
884 NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, DISubprogram Fn) {
885 SmallString<32> Name;
886 fixupSubprogramName(Fn, Name);
887 return M.getOrInsertNamedMetadata(Name.str());
890 /// createInlinedVariable - Create a new inlined variable based on current
892 /// @param DV Current Variable.
893 /// @param InlinedScope Location at current variable is inlined.
894 DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
895 LLVMContext &VMContext) {
896 SmallVector<Value *, 16> Elts;
897 // Insert inlined scope as 7th element.
898 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
899 i == 7 ? Elts.push_back(InlinedScope) : Elts.push_back(DV->getOperand(i));
900 return DIVariable(MDNode::get(VMContext, Elts));
903 /// cleanseInlinedVariable - Remove inlined scope from the variable.
904 DIVariable llvm::cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext) {
905 SmallVector<Value *, 16> Elts;
906 // Insert inlined scope as 7th element.
907 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
908 i == 7 ? Elts.push_back(Constant::getNullValue(Type::getInt32Ty(VMContext)))
909 : Elts.push_back(DV->getOperand(i));
910 return DIVariable(MDNode::get(VMContext, Elts));
913 /// getDISubprogram - Find subprogram that is enclosing this scope.
914 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
915 DIDescriptor D(Scope);
916 if (D.isSubprogram())
917 return DISubprogram(Scope);
919 if (D.isLexicalBlockFile())
920 return getDISubprogram(DILexicalBlockFile(Scope).getContext());
922 if (D.isLexicalBlock())
923 return getDISubprogram(DILexicalBlock(Scope).getContext());
925 return DISubprogram();
928 /// getDICompositeType - Find underlying composite type.
929 DICompositeType llvm::getDICompositeType(DIType T) {
930 if (T.isCompositeType())
931 return DICompositeType(T);
933 if (T.isDerivedType()) {
934 // This function is currently used by dragonegg and dragonegg does
935 // not generate identifier for types, so using an empty map to resolve
936 // DerivedFrom should be fine.
937 DITypeIdentifierMap EmptyMap;
938 return getDICompositeType(
939 DIDerivedType(T).getTypeDerivedFrom().resolve(EmptyMap));
942 return DICompositeType();
945 /// Update DITypeIdentifierMap by going through retained types of each CU.
947 llvm::generateDITypeIdentifierMap(const NamedMDNode *CU_Nodes) {
948 DITypeIdentifierMap Map;
949 for (unsigned CUi = 0, CUe = CU_Nodes->getNumOperands(); CUi != CUe; ++CUi) {
950 DICompileUnit CU(CU_Nodes->getOperand(CUi));
951 DIArray Retain = CU.getRetainedTypes();
952 for (unsigned Ti = 0, Te = Retain.getNumElements(); Ti != Te; ++Ti) {
953 if (!Retain.getElement(Ti).isCompositeType())
955 DICompositeType Ty(Retain.getElement(Ti));
956 if (MDString *TypeId = Ty.getIdentifier()) {
957 // Definition has priority over declaration.
958 // Try to insert (TypeId, Ty) to Map.
959 std::pair<DITypeIdentifierMap::iterator, bool> P =
960 Map.insert(std::make_pair(TypeId, Ty));
961 // If TypeId already exists in Map and this is a definition, replace
962 // whatever we had (declaration or definition) with the definition.
963 if (!P.second && !Ty.isForwardDecl())
964 P.first->second = Ty;
971 //===----------------------------------------------------------------------===//
972 // DebugInfoFinder implementations.
973 //===----------------------------------------------------------------------===//
975 void DebugInfoFinder::reset() {
982 TypeIdentifierMap.clear();
983 TypeMapInitialized = false;
986 void DebugInfoFinder::InitializeTypeMap(const Module &M) {
987 if (!TypeMapInitialized)
988 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
989 TypeIdentifierMap = generateDITypeIdentifierMap(CU_Nodes);
990 TypeMapInitialized = true;
994 /// processModule - Process entire module and collect debug info.
995 void DebugInfoFinder::processModule(const Module &M) {
996 InitializeTypeMap(M);
997 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
998 for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
999 DICompileUnit CU(CU_Nodes->getOperand(i));
1001 DIArray GVs = CU.getGlobalVariables();
1002 for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) {
1003 DIGlobalVariable DIG(GVs.getElement(i));
1004 if (addGlobalVariable(DIG)) {
1005 processScope(DIG.getContext());
1006 processType(DIG.getType().resolve(TypeIdentifierMap));
1009 DIArray SPs = CU.getSubprograms();
1010 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
1011 processSubprogram(DISubprogram(SPs.getElement(i)));
1012 DIArray EnumTypes = CU.getEnumTypes();
1013 for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i)
1014 processType(DIType(EnumTypes.getElement(i)));
1015 DIArray RetainedTypes = CU.getRetainedTypes();
1016 for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
1017 processType(DIType(RetainedTypes.getElement(i)));
1018 DIArray Imports = CU.getImportedEntities();
1019 for (unsigned i = 0, e = Imports.getNumElements(); i != e; ++i) {
1020 DIImportedEntity Import = DIImportedEntity(Imports.getElement(i));
1021 DIDescriptor Entity = Import.getEntity().resolve(TypeIdentifierMap);
1022 if (Entity.isType())
1023 processType(DIType(Entity));
1024 else if (Entity.isSubprogram())
1025 processSubprogram(DISubprogram(Entity));
1026 else if (Entity.isNameSpace())
1027 processScope(DINameSpace(Entity).getContext());
1033 /// processLocation - Process DILocation.
1034 void DebugInfoFinder::processLocation(const Module &M, DILocation Loc) {
1037 InitializeTypeMap(M);
1038 processScope(Loc.getScope());
1039 processLocation(M, Loc.getOrigLocation());
1042 /// processType - Process DIType.
1043 void DebugInfoFinder::processType(DIType DT) {
1046 processScope(DT.getContext().resolve(TypeIdentifierMap));
1047 if (DT.isCompositeType()) {
1048 DICompositeType DCT(DT);
1049 processType(DCT.getTypeDerivedFrom().resolve(TypeIdentifierMap));
1050 DIArray DA = DCT.getTypeArray();
1051 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
1052 DIDescriptor D = DA.getElement(i);
1054 processType(DIType(D));
1055 else if (D.isSubprogram())
1056 processSubprogram(DISubprogram(D));
1058 } else if (DT.isDerivedType()) {
1059 DIDerivedType DDT(DT);
1060 processType(DDT.getTypeDerivedFrom().resolve(TypeIdentifierMap));
1064 void DebugInfoFinder::processScope(DIScope Scope) {
1065 if (Scope.isType()) {
1070 if (Scope.isCompileUnit()) {
1071 addCompileUnit(DICompileUnit(Scope));
1074 if (Scope.isSubprogram()) {
1075 processSubprogram(DISubprogram(Scope));
1078 if (!addScope(Scope))
1080 if (Scope.isLexicalBlock()) {
1081 DILexicalBlock LB(Scope);
1082 processScope(LB.getContext());
1083 } else if (Scope.isLexicalBlockFile()) {
1084 DILexicalBlockFile LBF = DILexicalBlockFile(Scope);
1085 processScope(LBF.getScope());
1086 } else if (Scope.isNameSpace()) {
1087 DINameSpace NS(Scope);
1088 processScope(NS.getContext());
1092 /// processSubprogram - Process DISubprogram.
1093 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
1094 if (!addSubprogram(SP))
1096 processScope(SP.getContext().resolve(TypeIdentifierMap));
1097 processType(SP.getType());
1098 DIArray TParams = SP.getTemplateParams();
1099 for (unsigned I = 0, E = TParams.getNumElements(); I != E; ++I) {
1100 DIDescriptor Element = TParams.getElement(I);
1101 if (Element.isTemplateTypeParameter()) {
1102 DITemplateTypeParameter TType(Element);
1103 processScope(TType.getContext().resolve(TypeIdentifierMap));
1104 processType(TType.getType().resolve(TypeIdentifierMap));
1105 } else if (Element.isTemplateValueParameter()) {
1106 DITemplateValueParameter TVal(Element);
1107 processScope(TVal.getContext().resolve(TypeIdentifierMap));
1108 processType(TVal.getType().resolve(TypeIdentifierMap));
1113 /// processDeclare - Process DbgDeclareInst.
1114 void DebugInfoFinder::processDeclare(const Module &M,
1115 const DbgDeclareInst *DDI) {
1116 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
1119 InitializeTypeMap(M);
1122 if (!DV.isVariable())
1125 if (!NodesSeen.insert(DV))
1127 processScope(DIVariable(N).getContext());
1128 processType(DIVariable(N).getType().resolve(TypeIdentifierMap));
1131 void DebugInfoFinder::processValue(const Module &M, const DbgValueInst *DVI) {
1132 MDNode *N = dyn_cast<MDNode>(DVI->getVariable());
1135 InitializeTypeMap(M);
1138 if (!DV.isVariable())
1141 if (!NodesSeen.insert(DV))
1143 processScope(DIVariable(N).getContext());
1144 processType(DIVariable(N).getType().resolve(TypeIdentifierMap));
1147 /// addType - Add type into Tys.
1148 bool DebugInfoFinder::addType(DIType DT) {
1152 if (!NodesSeen.insert(DT))
1159 /// addCompileUnit - Add compile unit into CUs.
1160 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
1163 if (!NodesSeen.insert(CU))
1170 /// addGlobalVariable - Add global variable into GVs.
1171 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
1175 if (!NodesSeen.insert(DIG))
1182 // addSubprogram - Add subprgoram into SPs.
1183 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1187 if (!NodesSeen.insert(SP))
1194 bool DebugInfoFinder::addScope(DIScope Scope) {
1197 // FIXME: Ocaml binding generates a scope with no content, we treat it
1199 if (Scope->getNumOperands() == 0)
1201 if (!NodesSeen.insert(Scope))
1203 Scopes.push_back(Scope);
1207 //===----------------------------------------------------------------------===//
1208 // DIDescriptor: dump routines for all descriptors.
1209 //===----------------------------------------------------------------------===//
1211 /// dump - Print descriptor to dbgs() with a newline.
1212 void DIDescriptor::dump() const {
1217 /// print - Print descriptor.
1218 void DIDescriptor::print(raw_ostream &OS) const {
1222 if (const char *Tag = dwarf::TagString(getTag()))
1223 OS << "[ " << Tag << " ]";
1225 if (this->isSubrange()) {
1226 DISubrange(DbgNode).printInternal(OS);
1227 } else if (this->isCompileUnit()) {
1228 DICompileUnit(DbgNode).printInternal(OS);
1229 } else if (this->isFile()) {
1230 DIFile(DbgNode).printInternal(OS);
1231 } else if (this->isEnumerator()) {
1232 DIEnumerator(DbgNode).printInternal(OS);
1233 } else if (this->isBasicType()) {
1234 DIType(DbgNode).printInternal(OS);
1235 } else if (this->isDerivedType()) {
1236 DIDerivedType(DbgNode).printInternal(OS);
1237 } else if (this->isCompositeType()) {
1238 DICompositeType(DbgNode).printInternal(OS);
1239 } else if (this->isSubprogram()) {
1240 DISubprogram(DbgNode).printInternal(OS);
1241 } else if (this->isGlobalVariable()) {
1242 DIGlobalVariable(DbgNode).printInternal(OS);
1243 } else if (this->isVariable()) {
1244 DIVariable(DbgNode).printInternal(OS);
1245 } else if (this->isObjCProperty()) {
1246 DIObjCProperty(DbgNode).printInternal(OS);
1247 } else if (this->isNameSpace()) {
1248 DINameSpace(DbgNode).printInternal(OS);
1249 } else if (this->isScope()) {
1250 DIScope(DbgNode).printInternal(OS);
1254 void DISubrange::printInternal(raw_ostream &OS) const {
1255 int64_t Count = getCount();
1257 OS << " [" << getLo() << ", " << Count - 1 << ']';
1259 OS << " [unbounded]";
1262 void DIScope::printInternal(raw_ostream &OS) const {
1263 OS << " [" << getDirectory() << "/" << getFilename() << ']';
1266 void DICompileUnit::printInternal(raw_ostream &OS) const {
1267 DIScope::printInternal(OS);
1269 unsigned Lang = getLanguage();
1270 if (const char *LangStr = dwarf::LanguageString(Lang))
1273 (OS << "lang 0x").write_hex(Lang);
1277 void DIEnumerator::printInternal(raw_ostream &OS) const {
1278 OS << " [" << getName() << " :: " << getEnumValue() << ']';
1281 void DIType::printInternal(raw_ostream &OS) const {
1285 StringRef Res = getName();
1287 OS << " [" << Res << "]";
1289 // TODO: Print context?
1291 OS << " [line " << getLineNumber() << ", size " << getSizeInBits()
1292 << ", align " << getAlignInBits() << ", offset " << getOffsetInBits();
1294 if (const char *Enc =
1295 dwarf::AttributeEncodingString(DIBasicType(DbgNode).getEncoding()))
1296 OS << ", enc " << Enc;
1301 else if (isProtected())
1302 OS << " [protected]";
1305 OS << " [artificial]";
1307 if (isForwardDecl())
1309 else if (getTag() == dwarf::DW_TAG_structure_type ||
1310 getTag() == dwarf::DW_TAG_union_type ||
1311 getTag() == dwarf::DW_TAG_enumeration_type ||
1312 getTag() == dwarf::DW_TAG_class_type)
1316 if (isStaticMember())
1319 if (isLValueReference())
1320 OS << " [reference]";
1322 if (isRValueReference())
1323 OS << " [rvalue reference]";
1326 void DIDerivedType::printInternal(raw_ostream &OS) const {
1327 DIType::printInternal(OS);
1328 OS << " [from " << getTypeDerivedFrom().getName() << ']';
1331 void DICompositeType::printInternal(raw_ostream &OS) const {
1332 DIType::printInternal(OS);
1333 DIArray A = getTypeArray();
1334 OS << " [" << A.getNumElements() << " elements]";
1337 void DINameSpace::printInternal(raw_ostream &OS) const {
1338 StringRef Name = getName();
1340 OS << " [" << Name << ']';
1342 OS << " [line " << getLineNumber() << ']';
1345 void DISubprogram::printInternal(raw_ostream &OS) const {
1346 // TODO : Print context
1347 OS << " [line " << getLineNumber() << ']';
1349 if (isLocalToUnit())
1355 if (getScopeLineNumber() != getLineNumber())
1356 OS << " [scope " << getScopeLineNumber() << "]";
1360 else if (isProtected())
1361 OS << " [protected]";
1363 if (isLValueReference())
1364 OS << " [reference]";
1366 if (isRValueReference())
1367 OS << " [rvalue reference]";
1369 StringRef Res = getName();
1371 OS << " [" << Res << ']';
1374 void DIGlobalVariable::printInternal(raw_ostream &OS) const {
1375 StringRef Res = getName();
1377 OS << " [" << Res << ']';
1379 OS << " [line " << getLineNumber() << ']';
1381 // TODO : Print context
1383 if (isLocalToUnit())
1390 void DIVariable::printInternal(raw_ostream &OS) const {
1391 StringRef Res = getName();
1393 OS << " [" << Res << ']';
1395 OS << " [line " << getLineNumber() << ']';
1398 void DIObjCProperty::printInternal(raw_ostream &OS) const {
1399 StringRef Name = getObjCPropertyName();
1401 OS << " [" << Name << ']';
1403 OS << " [line " << getLineNumber() << ", properties " << getUnsignedField(6)
1407 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
1408 const LLVMContext &Ctx) {
1409 if (!DL.isUnknown()) { // Print source line info.
1410 DIScope Scope(DL.getScope(Ctx));
1411 assert(Scope.isScope() && "Scope of a DebugLoc should be a DIScope.");
1412 // Omit the directory, because it's likely to be long and uninteresting.
1413 CommentOS << Scope.getFilename();
1414 CommentOS << ':' << DL.getLine();
1415 if (DL.getCol() != 0)
1416 CommentOS << ':' << DL.getCol();
1417 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx));
1418 if (!InlinedAtDL.isUnknown()) {
1419 CommentOS << " @[ ";
1420 printDebugLoc(InlinedAtDL, CommentOS, Ctx);
1426 void DIVariable::printExtendedName(raw_ostream &OS) const {
1427 const LLVMContext &Ctx = DbgNode->getContext();
1428 StringRef Res = getName();
1430 OS << Res << "," << getLineNumber();
1431 if (MDNode *InlinedAt = getInlinedAt()) {
1432 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(InlinedAt);
1433 if (!InlinedAtDL.isUnknown()) {
1435 printDebugLoc(InlinedAtDL, OS, Ctx);
1441 /// Specialize constructor to make sure it has the correct type.
1442 template <> DIRef<DIScope>::DIRef(const Value *V) : Val(V) {
1443 assert(isScopeRef(V) && "DIScopeRef should be a MDString or MDNode");
1445 template <> DIRef<DIType>::DIRef(const Value *V) : Val(V) {
1446 assert(isTypeRef(V) && "DITypeRef should be a MDString or MDNode");
1449 /// Specialize getFieldAs to handle fields that are references to DIScopes.
1451 DIScopeRef DIDescriptor::getFieldAs<DIScopeRef>(unsigned Elt) const {
1452 return DIScopeRef(getField(DbgNode, Elt));
1454 /// Specialize getFieldAs to handle fields that are references to DITypes.
1455 template <> DITypeRef DIDescriptor::getFieldAs<DITypeRef>(unsigned Elt) const {
1456 return DITypeRef(getField(DbgNode, Elt));
1459 /// Strip debug info in the module if it exists.
1460 /// To do this, we remove all calls to the debugger intrinsics and any named
1461 /// metadata for debugging. We also remove debug locations for instructions.
1462 /// Return true if module is modified.
1463 bool llvm::StripDebugInfo(Module &M) {
1465 bool Changed = false;
1467 // Remove all of the calls to the debugger intrinsics, and remove them from
1469 if (Function *Declare = M.getFunction("llvm.dbg.declare")) {
1470 while (!Declare->use_empty()) {
1471 CallInst *CI = cast<CallInst>(Declare->user_back());
1472 CI->eraseFromParent();
1474 Declare->eraseFromParent();
1478 if (Function *DbgVal = M.getFunction("llvm.dbg.value")) {
1479 while (!DbgVal->use_empty()) {
1480 CallInst *CI = cast<CallInst>(DbgVal->user_back());
1481 CI->eraseFromParent();
1483 DbgVal->eraseFromParent();
1487 for (Module::named_metadata_iterator NMI = M.named_metadata_begin(),
1488 NME = M.named_metadata_end(); NMI != NME;) {
1489 NamedMDNode *NMD = NMI;
1491 if (NMD->getName().startswith("llvm.dbg.")) {
1492 NMD->eraseFromParent();
1497 for (Module::iterator MI = M.begin(), ME = M.end(); MI != ME; ++MI)
1498 for (Function::iterator FI = MI->begin(), FE = MI->end(); FI != FE;
1500 for (BasicBlock::iterator BI = FI->begin(), BE = FI->end(); BI != BE;
1502 if (!BI->getDebugLoc().isUnknown()) {
1504 BI->setDebugLoc(DebugLoc());
1511 /// Return Debug Info Metadata Version by checking module flags.
1512 unsigned llvm::getDebugMetadataVersionFromModule(const Module &M) {
1513 Value *Val = M.getModuleFlag("Debug Info Version");
1516 return cast<ConstantInt>(Val)->getZExtValue();