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(LLVMContext &VMContext, 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()
347 const MDNode *DN = D;
349 SmallVector<Value*, 10> Ops(DbgNode->getNumOperands());
350 for (size_t i = 0; i != Ops.size(); ++i)
351 Ops[i] = DbgNode->getOperand(i);
352 DN = MDNode::get(VMContext, Ops);
355 MDNode *Node = const_cast<MDNode *>(DbgNode);
356 const Value *V = cast_or_null<Value>(DN);
357 Node->replaceAllUsesWith(const_cast<Value *>(V));
358 MDNode::deleteTemporary(Node);
362 /// replaceAllUsesWith - Replace all uses of the MDNode used by this
363 /// type with the one in D.
364 void DIType::replaceAllUsesWith(MDNode *D) {
366 assert(DbgNode && "Trying to replace an unverified type!");
367 assert(DbgNode != D && "This replacement should always happen");
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);
375 /// Verify - Verify that a compile unit is well formed.
376 bool DICompileUnit::Verify() const {
377 if (!isCompileUnit())
380 // Don't bother verifying the compilation directory or producer string
381 // as those could be empty.
382 if (getFilename().empty())
385 return DbgNode->getNumOperands() == 14;
388 /// Verify - Verify that an ObjC property is well formed.
389 bool DIObjCProperty::Verify() const {
390 if (!isObjCProperty())
393 // Don't worry about the rest of the strings for now.
394 return DbgNode->getNumOperands() == 8;
397 /// Check if a field at position Elt of a MDNode is a MDNode.
398 /// We currently allow an empty string and an integer.
399 /// But we don't allow a non-empty string in a MDNode field.
400 static bool fieldIsMDNode(const MDNode *DbgNode, unsigned Elt) {
401 // FIXME: This function should return true, if the field is null or the field
402 // is indeed a MDNode: return !Fld || isa<MDNode>(Fld).
403 Value *Fld = getField(DbgNode, Elt);
404 if (Fld && isa<MDString>(Fld) && !cast<MDString>(Fld)->getString().empty())
409 /// Check if a field at position Elt of a MDNode is a MDString.
410 static bool fieldIsMDString(const MDNode *DbgNode, unsigned Elt) {
411 Value *Fld = getField(DbgNode, Elt);
412 return !Fld || isa<MDString>(Fld);
415 /// Check if a value can be a reference to a type.
416 static bool isTypeRef(const Value *Val) {
418 (isa<MDString>(Val) && !cast<MDString>(Val)->getString().empty()) ||
419 (isa<MDNode>(Val) && DIType(cast<MDNode>(Val)).isType());
422 /// Check if a field at position Elt of a MDNode can be a reference to a type.
423 static bool fieldIsTypeRef(const MDNode *DbgNode, unsigned Elt) {
424 Value *Fld = getField(DbgNode, Elt);
425 return isTypeRef(Fld);
428 /// Check if a value can be a ScopeRef.
429 static bool isScopeRef(const Value *Val) {
431 (isa<MDString>(Val) && !cast<MDString>(Val)->getString().empty()) ||
432 // Not checking for Val->isScope() here, because it would work
433 // only for lexical scopes and not all subclasses of DIScope.
437 /// Check if a field at position Elt of a MDNode can be a ScopeRef.
438 static bool fieldIsScopeRef(const MDNode *DbgNode, unsigned Elt) {
439 Value *Fld = getField(DbgNode, Elt);
440 return isScopeRef(Fld);
443 /// Verify - Verify that a type descriptor is well formed.
444 bool DIType::Verify() const {
447 // Make sure Context @ field 2 is MDNode.
448 if (!fieldIsScopeRef(DbgNode, 2))
451 // FIXME: Sink this into the various subclass verifies.
452 uint16_t Tag = getTag();
453 if (!isBasicType() && Tag != dwarf::DW_TAG_const_type &&
454 Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
455 Tag != dwarf::DW_TAG_ptr_to_member_type &&
456 Tag != dwarf::DW_TAG_reference_type &&
457 Tag != dwarf::DW_TAG_rvalue_reference_type &&
458 Tag != dwarf::DW_TAG_restrict_type && Tag != dwarf::DW_TAG_array_type &&
459 Tag != dwarf::DW_TAG_enumeration_type &&
460 Tag != dwarf::DW_TAG_subroutine_type &&
461 Tag != dwarf::DW_TAG_inheritance && Tag != dwarf::DW_TAG_friend &&
462 getFilename().empty())
464 // DIType is abstract, it should be a BasicType, a DerivedType or
467 return DIBasicType(DbgNode).Verify();
468 else if (isCompositeType())
469 return DICompositeType(DbgNode).Verify();
470 else if (isDerivedType())
471 return DIDerivedType(DbgNode).Verify();
476 /// Verify - Verify that a basic type descriptor is well formed.
477 bool DIBasicType::Verify() const {
478 return isBasicType() && DbgNode->getNumOperands() == 10;
481 /// Verify - Verify that a derived type descriptor is well formed.
482 bool DIDerivedType::Verify() const {
483 // Make sure DerivedFrom @ field 9 is TypeRef.
484 if (!fieldIsTypeRef(DbgNode, 9))
486 if (getTag() == dwarf::DW_TAG_ptr_to_member_type)
487 // Make sure ClassType @ field 10 is a TypeRef.
488 if (!fieldIsTypeRef(DbgNode, 10))
491 return isDerivedType() && DbgNode->getNumOperands() >= 10 &&
492 DbgNode->getNumOperands() <= 14;
495 /// Verify - Verify that a composite type descriptor is well formed.
496 bool DICompositeType::Verify() const {
497 if (!isCompositeType())
500 // Make sure DerivedFrom @ field 9 and ContainingType @ field 12 are TypeRef.
501 if (!fieldIsTypeRef(DbgNode, 9))
503 if (!fieldIsTypeRef(DbgNode, 12))
506 // Make sure the type identifier at field 14 is MDString, it can be null.
507 if (!fieldIsMDString(DbgNode, 14))
510 // A subroutine type can't be both & and &&.
511 if (isLValueReference() && isRValueReference())
514 return DbgNode->getNumOperands() == 15;
517 /// Verify - Verify that a subprogram descriptor is well formed.
518 bool DISubprogram::Verify() const {
522 // Make sure context @ field 2 is a ScopeRef and type @ field 7 is a MDNode.
523 if (!fieldIsScopeRef(DbgNode, 2))
525 if (!fieldIsMDNode(DbgNode, 7))
527 // Containing type @ field 12.
528 if (!fieldIsTypeRef(DbgNode, 12))
531 // A subprogram can't be both & and &&.
532 if (isLValueReference() && isRValueReference())
535 return DbgNode->getNumOperands() == 20;
538 /// Verify - Verify that a global variable descriptor is well formed.
539 bool DIGlobalVariable::Verify() const {
540 if (!isGlobalVariable())
543 if (getDisplayName().empty())
545 // Make sure context @ field 2 is an MDNode.
546 if (!fieldIsMDNode(DbgNode, 2))
548 // Make sure that type @ field 8 is a DITypeRef.
549 if (!fieldIsTypeRef(DbgNode, 8))
551 // Make sure StaticDataMemberDeclaration @ field 12 is MDNode.
552 if (!fieldIsMDNode(DbgNode, 12))
555 return DbgNode->getNumOperands() == 13;
558 /// Verify - Verify that a variable descriptor is well formed.
559 bool DIVariable::Verify() const {
563 // Make sure context @ field 1 is an MDNode.
564 if (!fieldIsMDNode(DbgNode, 1))
566 // Make sure that type @ field 5 is a DITypeRef.
567 if (!fieldIsTypeRef(DbgNode, 5))
569 return DbgNode->getNumOperands() >= 8;
572 /// Verify - Verify that a location descriptor is well formed.
573 bool DILocation::Verify() const {
577 return DbgNode->getNumOperands() == 4;
580 /// Verify - Verify that a namespace descriptor is well formed.
581 bool DINameSpace::Verify() const {
584 return DbgNode->getNumOperands() == 5;
587 /// \brief Retrieve the MDNode for the directory/file pair.
588 MDNode *DIFile::getFileNode() const { return getNodeField(DbgNode, 1); }
590 /// \brief Verify that the file descriptor is well formed.
591 bool DIFile::Verify() const {
592 return isFile() && DbgNode->getNumOperands() == 2;
595 /// \brief Verify that the enumerator descriptor is well formed.
596 bool DIEnumerator::Verify() const {
597 return isEnumerator() && DbgNode->getNumOperands() == 3;
600 /// \brief Verify that the subrange descriptor is well formed.
601 bool DISubrange::Verify() const {
602 return isSubrange() && DbgNode->getNumOperands() == 3;
605 /// \brief Verify that the lexical block descriptor is well formed.
606 bool DILexicalBlock::Verify() const {
607 return isLexicalBlock() && DbgNode->getNumOperands() == 7;
610 /// \brief Verify that the file-scoped lexical block descriptor is well formed.
611 bool DILexicalBlockFile::Verify() const {
612 return isLexicalBlockFile() && DbgNode->getNumOperands() == 3;
615 /// \brief Verify that an unspecified parameter descriptor is well formed.
616 bool DIUnspecifiedParameter::Verify() const {
617 return isUnspecifiedParameter() && DbgNode->getNumOperands() == 1;
620 /// \brief Verify that the template type parameter descriptor is well formed.
621 bool DITemplateTypeParameter::Verify() const {
622 return isTemplateTypeParameter() && DbgNode->getNumOperands() == 7;
625 /// \brief Verify that the template value parameter descriptor is well formed.
626 bool DITemplateValueParameter::Verify() const {
627 return isTemplateValueParameter() && DbgNode->getNumOperands() == 8;
630 /// \brief Verify that the imported module descriptor is well formed.
631 bool DIImportedEntity::Verify() const {
632 return isImportedEntity() &&
633 (DbgNode->getNumOperands() == 4 || DbgNode->getNumOperands() == 5);
636 /// getObjCProperty - Return property node, if this ivar is associated with one.
637 MDNode *DIDerivedType::getObjCProperty() const {
638 return getNodeField(DbgNode, 10);
641 MDString *DICompositeType::getIdentifier() const {
642 return cast_or_null<MDString>(getField(DbgNode, 14));
646 static void VerifySubsetOf(const MDNode *LHS, const MDNode *RHS) {
647 for (unsigned i = 0; i != LHS->getNumOperands(); ++i) {
648 // Skip the 'empty' list (that's a single i32 0, rather than truly empty).
649 if (i == 0 && isa<ConstantInt>(LHS->getOperand(i)))
651 const MDNode *E = cast<MDNode>(LHS->getOperand(i));
653 for (unsigned j = 0; !found && j != RHS->getNumOperands(); ++j)
654 found = E == RHS->getOperand(j);
655 assert(found && "Losing a member during member list replacement");
660 /// \brief Set the array of member DITypes.
661 void DICompositeType::setTypeArray(DIArray Elements, DIArray TParams) {
662 assert((!TParams || DbgNode->getNumOperands() == 15) &&
663 "If you're setting the template parameters this should include a slot "
665 TrackingVH<MDNode> N(*this);
668 // Check that the new list of members contains all the old members as well.
669 if (const MDNode *El = cast_or_null<MDNode>(N->getOperand(10)))
670 VerifySubsetOf(El, Elements);
672 N->replaceOperandWith(10, Elements);
675 N->replaceOperandWith(13, TParams);
679 /// Generate a reference to this DIType. Uses the type identifier instead
680 /// of the actual MDNode if possible, to help type uniquing.
681 DIScopeRef DIScope::getRef() const {
682 if (!isCompositeType())
683 return DIScopeRef(*this);
684 DICompositeType DTy(DbgNode);
685 if (!DTy.getIdentifier())
686 return DIScopeRef(*this);
687 return DIScopeRef(DTy.getIdentifier());
690 /// \brief Set the containing type.
691 void DICompositeType::setContainingType(DICompositeType ContainingType) {
692 TrackingVH<MDNode> N(*this);
693 N->replaceOperandWith(12, ContainingType.getRef());
697 /// isInlinedFnArgument - Return true if this variable provides debugging
698 /// information for an inlined function arguments.
699 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
700 assert(CurFn && "Invalid function");
701 if (!getContext().isSubprogram())
703 // This variable is not inlined function argument if its scope
704 // does not describe current function.
705 return !DISubprogram(getContext()).describes(CurFn);
708 /// describes - Return true if this subprogram provides debugging
709 /// information for the function F.
710 bool DISubprogram::describes(const Function *F) {
711 assert(F && "Invalid function");
712 if (F == getFunction())
714 StringRef Name = getLinkageName();
717 if (F->getName() == Name)
722 unsigned DISubprogram::isOptimized() const {
723 assert(DbgNode && "Invalid subprogram descriptor!");
724 if (DbgNode->getNumOperands() == 15)
725 return getUnsignedField(14);
729 MDNode *DISubprogram::getVariablesNodes() const {
730 return getNodeField(DbgNode, 18);
733 DIArray DISubprogram::getVariables() const {
734 return DIArray(getNodeField(DbgNode, 18));
737 Value *DITemplateValueParameter::getValue() const {
738 return getField(DbgNode, 4);
741 // If the current node has a parent scope then return that,
742 // else return an empty scope.
743 DIScopeRef DIScope::getContext() const {
746 return DIType(DbgNode).getContext();
749 return DIScopeRef(DISubprogram(DbgNode).getContext());
751 if (isLexicalBlock())
752 return DIScopeRef(DILexicalBlock(DbgNode).getContext());
754 if (isLexicalBlockFile())
755 return DIScopeRef(DILexicalBlockFile(DbgNode).getContext());
758 return DIScopeRef(DINameSpace(DbgNode).getContext());
760 assert((isFile() || isCompileUnit()) && "Unhandled type of scope.");
761 return DIScopeRef(nullptr);
764 // If the scope node has a name, return that, else return an empty string.
765 StringRef DIScope::getName() const {
767 return DIType(DbgNode).getName();
769 return DISubprogram(DbgNode).getName();
771 return DINameSpace(DbgNode).getName();
772 assert((isLexicalBlock() || isLexicalBlockFile() || isFile() ||
774 "Unhandled type of scope.");
778 StringRef DIScope::getFilename() const {
781 return ::getStringField(getNodeField(DbgNode, 1), 0);
784 StringRef DIScope::getDirectory() const {
787 return ::getStringField(getNodeField(DbgNode, 1), 1);
790 DIArray DICompileUnit::getEnumTypes() const {
791 if (!DbgNode || DbgNode->getNumOperands() < 13)
794 return DIArray(getNodeField(DbgNode, 7));
797 DIArray DICompileUnit::getRetainedTypes() const {
798 if (!DbgNode || DbgNode->getNumOperands() < 13)
801 return DIArray(getNodeField(DbgNode, 8));
804 DIArray DICompileUnit::getSubprograms() const {
805 if (!DbgNode || DbgNode->getNumOperands() < 13)
808 return DIArray(getNodeField(DbgNode, 9));
811 DIArray DICompileUnit::getGlobalVariables() const {
812 if (!DbgNode || DbgNode->getNumOperands() < 13)
815 return DIArray(getNodeField(DbgNode, 10));
818 DIArray DICompileUnit::getImportedEntities() const {
819 if (!DbgNode || DbgNode->getNumOperands() < 13)
822 return DIArray(getNodeField(DbgNode, 11));
825 /// copyWithNewScope - Return a copy of this location, replacing the
826 /// current scope with the given one.
827 DILocation DILocation::copyWithNewScope(LLVMContext &Ctx,
828 DILexicalBlock NewScope) {
829 SmallVector<Value *, 10> Elts;
831 for (unsigned I = 0; I < DbgNode->getNumOperands(); ++I) {
833 Elts.push_back(DbgNode->getOperand(I));
835 Elts.push_back(NewScope);
837 MDNode *NewDIL = MDNode::get(Ctx, Elts);
838 return DILocation(NewDIL);
841 /// computeNewDiscriminator - Generate a new discriminator value for this
842 /// file and line location.
843 unsigned DILocation::computeNewDiscriminator(LLVMContext &Ctx) {
844 std::pair<const char *, unsigned> Key(getFilename().data(), getLineNumber());
845 return ++Ctx.pImpl->DiscriminatorTable[Key];
848 /// fixupSubprogramName - Replace contains special characters used
849 /// in a typical Objective-C names with '.' in a given string.
850 static void fixupSubprogramName(DISubprogram Fn, SmallVectorImpl<char> &Out) {
852 Fn.getFunction() ? Fn.getFunction()->getName() : Fn.getName();
853 FName = Function::getRealLinkageName(FName);
855 StringRef Prefix("llvm.dbg.lv.");
856 Out.reserve(FName.size() + Prefix.size());
857 Out.append(Prefix.begin(), Prefix.end());
859 bool isObjCLike = false;
860 for (size_t i = 0, e = FName.size(); i < e; ++i) {
865 if (isObjCLike && (C == '[' || C == ']' || C == ' ' || C == ':' ||
866 C == '+' || C == '(' || C == ')'))
873 /// getFnSpecificMDNode - Return a NameMDNode, if available, that is
874 /// suitable to hold function specific information.
875 NamedMDNode *llvm::getFnSpecificMDNode(const Module &M, DISubprogram Fn) {
876 SmallString<32> Name;
877 fixupSubprogramName(Fn, Name);
878 return M.getNamedMetadata(Name.str());
881 /// getOrInsertFnSpecificMDNode - Return a NameMDNode that is suitable
882 /// to hold function specific information.
883 NamedMDNode *llvm::getOrInsertFnSpecificMDNode(Module &M, DISubprogram Fn) {
884 SmallString<32> Name;
885 fixupSubprogramName(Fn, Name);
886 return M.getOrInsertNamedMetadata(Name.str());
889 /// createInlinedVariable - Create a new inlined variable based on current
891 /// @param DV Current Variable.
892 /// @param InlinedScope Location at current variable is inlined.
893 DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
894 LLVMContext &VMContext) {
895 SmallVector<Value *, 16> Elts;
896 // Insert inlined scope as 7th element.
897 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
898 i == 7 ? Elts.push_back(InlinedScope) : Elts.push_back(DV->getOperand(i));
899 return DIVariable(MDNode::get(VMContext, Elts));
902 /// cleanseInlinedVariable - Remove inlined scope from the variable.
903 DIVariable llvm::cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext) {
904 SmallVector<Value *, 16> Elts;
905 // Insert inlined scope as 7th element.
906 for (unsigned i = 0, e = DV->getNumOperands(); i != e; ++i)
907 i == 7 ? Elts.push_back(Constant::getNullValue(Type::getInt32Ty(VMContext)))
908 : Elts.push_back(DV->getOperand(i));
909 return DIVariable(MDNode::get(VMContext, Elts));
912 /// getDISubprogram - Find subprogram that is enclosing this scope.
913 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
914 DIDescriptor D(Scope);
915 if (D.isSubprogram())
916 return DISubprogram(Scope);
918 if (D.isLexicalBlockFile())
919 return getDISubprogram(DILexicalBlockFile(Scope).getContext());
921 if (D.isLexicalBlock())
922 return getDISubprogram(DILexicalBlock(Scope).getContext());
924 return DISubprogram();
927 /// getDICompositeType - Find underlying composite type.
928 DICompositeType llvm::getDICompositeType(DIType T) {
929 if (T.isCompositeType())
930 return DICompositeType(T);
932 if (T.isDerivedType()) {
933 // This function is currently used by dragonegg and dragonegg does
934 // not generate identifier for types, so using an empty map to resolve
935 // DerivedFrom should be fine.
936 DITypeIdentifierMap EmptyMap;
937 return getDICompositeType(
938 DIDerivedType(T).getTypeDerivedFrom().resolve(EmptyMap));
941 return DICompositeType();
944 /// Update DITypeIdentifierMap by going through retained types of each CU.
946 llvm::generateDITypeIdentifierMap(const NamedMDNode *CU_Nodes) {
947 DITypeIdentifierMap Map;
948 for (unsigned CUi = 0, CUe = CU_Nodes->getNumOperands(); CUi != CUe; ++CUi) {
949 DICompileUnit CU(CU_Nodes->getOperand(CUi));
950 DIArray Retain = CU.getRetainedTypes();
951 for (unsigned Ti = 0, Te = Retain.getNumElements(); Ti != Te; ++Ti) {
952 if (!Retain.getElement(Ti).isCompositeType())
954 DICompositeType Ty(Retain.getElement(Ti));
955 if (MDString *TypeId = Ty.getIdentifier()) {
956 // Definition has priority over declaration.
957 // Try to insert (TypeId, Ty) to Map.
958 std::pair<DITypeIdentifierMap::iterator, bool> P =
959 Map.insert(std::make_pair(TypeId, Ty));
960 // If TypeId already exists in Map and this is a definition, replace
961 // whatever we had (declaration or definition) with the definition.
962 if (!P.second && !Ty.isForwardDecl())
963 P.first->second = Ty;
970 //===----------------------------------------------------------------------===//
971 // DebugInfoFinder implementations.
972 //===----------------------------------------------------------------------===//
974 void DebugInfoFinder::reset() {
981 TypeIdentifierMap.clear();
982 TypeMapInitialized = false;
985 void DebugInfoFinder::InitializeTypeMap(const Module &M) {
986 if (!TypeMapInitialized)
987 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
988 TypeIdentifierMap = generateDITypeIdentifierMap(CU_Nodes);
989 TypeMapInitialized = true;
993 /// processModule - Process entire module and collect debug info.
994 void DebugInfoFinder::processModule(const Module &M) {
995 InitializeTypeMap(M);
996 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
997 for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
998 DICompileUnit CU(CU_Nodes->getOperand(i));
1000 DIArray GVs = CU.getGlobalVariables();
1001 for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) {
1002 DIGlobalVariable DIG(GVs.getElement(i));
1003 if (addGlobalVariable(DIG)) {
1004 processScope(DIG.getContext());
1005 processType(DIG.getType().resolve(TypeIdentifierMap));
1008 DIArray SPs = CU.getSubprograms();
1009 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
1010 processSubprogram(DISubprogram(SPs.getElement(i)));
1011 DIArray EnumTypes = CU.getEnumTypes();
1012 for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i)
1013 processType(DIType(EnumTypes.getElement(i)));
1014 DIArray RetainedTypes = CU.getRetainedTypes();
1015 for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
1016 processType(DIType(RetainedTypes.getElement(i)));
1017 DIArray Imports = CU.getImportedEntities();
1018 for (unsigned i = 0, e = Imports.getNumElements(); i != e; ++i) {
1019 DIImportedEntity Import = DIImportedEntity(Imports.getElement(i));
1020 DIDescriptor Entity = Import.getEntity().resolve(TypeIdentifierMap);
1021 if (Entity.isType())
1022 processType(DIType(Entity));
1023 else if (Entity.isSubprogram())
1024 processSubprogram(DISubprogram(Entity));
1025 else if (Entity.isNameSpace())
1026 processScope(DINameSpace(Entity).getContext());
1032 /// processLocation - Process DILocation.
1033 void DebugInfoFinder::processLocation(const Module &M, DILocation Loc) {
1036 InitializeTypeMap(M);
1037 processScope(Loc.getScope());
1038 processLocation(M, Loc.getOrigLocation());
1041 /// processType - Process DIType.
1042 void DebugInfoFinder::processType(DIType DT) {
1045 processScope(DT.getContext().resolve(TypeIdentifierMap));
1046 if (DT.isCompositeType()) {
1047 DICompositeType DCT(DT);
1048 processType(DCT.getTypeDerivedFrom().resolve(TypeIdentifierMap));
1049 DIArray DA = DCT.getTypeArray();
1050 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
1051 DIDescriptor D = DA.getElement(i);
1053 processType(DIType(D));
1054 else if (D.isSubprogram())
1055 processSubprogram(DISubprogram(D));
1057 } else if (DT.isDerivedType()) {
1058 DIDerivedType DDT(DT);
1059 processType(DDT.getTypeDerivedFrom().resolve(TypeIdentifierMap));
1063 void DebugInfoFinder::processScope(DIScope Scope) {
1064 if (Scope.isType()) {
1069 if (Scope.isCompileUnit()) {
1070 addCompileUnit(DICompileUnit(Scope));
1073 if (Scope.isSubprogram()) {
1074 processSubprogram(DISubprogram(Scope));
1077 if (!addScope(Scope))
1079 if (Scope.isLexicalBlock()) {
1080 DILexicalBlock LB(Scope);
1081 processScope(LB.getContext());
1082 } else if (Scope.isLexicalBlockFile()) {
1083 DILexicalBlockFile LBF = DILexicalBlockFile(Scope);
1084 processScope(LBF.getScope());
1085 } else if (Scope.isNameSpace()) {
1086 DINameSpace NS(Scope);
1087 processScope(NS.getContext());
1091 /// processSubprogram - Process DISubprogram.
1092 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
1093 if (!addSubprogram(SP))
1095 processScope(SP.getContext().resolve(TypeIdentifierMap));
1096 processType(SP.getType());
1097 DIArray TParams = SP.getTemplateParams();
1098 for (unsigned I = 0, E = TParams.getNumElements(); I != E; ++I) {
1099 DIDescriptor Element = TParams.getElement(I);
1100 if (Element.isTemplateTypeParameter()) {
1101 DITemplateTypeParameter TType(Element);
1102 processScope(TType.getContext().resolve(TypeIdentifierMap));
1103 processType(TType.getType().resolve(TypeIdentifierMap));
1104 } else if (Element.isTemplateValueParameter()) {
1105 DITemplateValueParameter TVal(Element);
1106 processScope(TVal.getContext().resolve(TypeIdentifierMap));
1107 processType(TVal.getType().resolve(TypeIdentifierMap));
1112 /// processDeclare - Process DbgDeclareInst.
1113 void DebugInfoFinder::processDeclare(const Module &M,
1114 const DbgDeclareInst *DDI) {
1115 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
1118 InitializeTypeMap(M);
1121 if (!DV.isVariable())
1124 if (!NodesSeen.insert(DV))
1126 processScope(DIVariable(N).getContext());
1127 processType(DIVariable(N).getType().resolve(TypeIdentifierMap));
1130 void DebugInfoFinder::processValue(const Module &M, const DbgValueInst *DVI) {
1131 MDNode *N = dyn_cast<MDNode>(DVI->getVariable());
1134 InitializeTypeMap(M);
1137 if (!DV.isVariable())
1140 if (!NodesSeen.insert(DV))
1142 processScope(DIVariable(N).getContext());
1143 processType(DIVariable(N).getType().resolve(TypeIdentifierMap));
1146 /// addType - Add type into Tys.
1147 bool DebugInfoFinder::addType(DIType DT) {
1151 if (!NodesSeen.insert(DT))
1158 /// addCompileUnit - Add compile unit into CUs.
1159 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
1162 if (!NodesSeen.insert(CU))
1169 /// addGlobalVariable - Add global variable into GVs.
1170 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
1174 if (!NodesSeen.insert(DIG))
1181 // addSubprogram - Add subprgoram into SPs.
1182 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1186 if (!NodesSeen.insert(SP))
1193 bool DebugInfoFinder::addScope(DIScope Scope) {
1196 // FIXME: Ocaml binding generates a scope with no content, we treat it
1198 if (Scope->getNumOperands() == 0)
1200 if (!NodesSeen.insert(Scope))
1202 Scopes.push_back(Scope);
1206 //===----------------------------------------------------------------------===//
1207 // DIDescriptor: dump routines for all descriptors.
1208 //===----------------------------------------------------------------------===//
1210 /// dump - Print descriptor to dbgs() with a newline.
1211 void DIDescriptor::dump() const {
1216 /// print - Print descriptor.
1217 void DIDescriptor::print(raw_ostream &OS) const {
1221 if (const char *Tag = dwarf::TagString(getTag()))
1222 OS << "[ " << Tag << " ]";
1224 if (this->isSubrange()) {
1225 DISubrange(DbgNode).printInternal(OS);
1226 } else if (this->isCompileUnit()) {
1227 DICompileUnit(DbgNode).printInternal(OS);
1228 } else if (this->isFile()) {
1229 DIFile(DbgNode).printInternal(OS);
1230 } else if (this->isEnumerator()) {
1231 DIEnumerator(DbgNode).printInternal(OS);
1232 } else if (this->isBasicType()) {
1233 DIType(DbgNode).printInternal(OS);
1234 } else if (this->isDerivedType()) {
1235 DIDerivedType(DbgNode).printInternal(OS);
1236 } else if (this->isCompositeType()) {
1237 DICompositeType(DbgNode).printInternal(OS);
1238 } else if (this->isSubprogram()) {
1239 DISubprogram(DbgNode).printInternal(OS);
1240 } else if (this->isGlobalVariable()) {
1241 DIGlobalVariable(DbgNode).printInternal(OS);
1242 } else if (this->isVariable()) {
1243 DIVariable(DbgNode).printInternal(OS);
1244 } else if (this->isObjCProperty()) {
1245 DIObjCProperty(DbgNode).printInternal(OS);
1246 } else if (this->isNameSpace()) {
1247 DINameSpace(DbgNode).printInternal(OS);
1248 } else if (this->isScope()) {
1249 DIScope(DbgNode).printInternal(OS);
1253 void DISubrange::printInternal(raw_ostream &OS) const {
1254 int64_t Count = getCount();
1256 OS << " [" << getLo() << ", " << Count - 1 << ']';
1258 OS << " [unbounded]";
1261 void DIScope::printInternal(raw_ostream &OS) const {
1262 OS << " [" << getDirectory() << "/" << getFilename() << ']';
1265 void DICompileUnit::printInternal(raw_ostream &OS) const {
1266 DIScope::printInternal(OS);
1268 unsigned Lang = getLanguage();
1269 if (const char *LangStr = dwarf::LanguageString(Lang))
1272 (OS << "lang 0x").write_hex(Lang);
1276 void DIEnumerator::printInternal(raw_ostream &OS) const {
1277 OS << " [" << getName() << " :: " << getEnumValue() << ']';
1280 void DIType::printInternal(raw_ostream &OS) const {
1284 StringRef Res = getName();
1286 OS << " [" << Res << "]";
1288 // TODO: Print context?
1290 OS << " [line " << getLineNumber() << ", size " << getSizeInBits()
1291 << ", align " << getAlignInBits() << ", offset " << getOffsetInBits();
1293 if (const char *Enc =
1294 dwarf::AttributeEncodingString(DIBasicType(DbgNode).getEncoding()))
1295 OS << ", enc " << Enc;
1300 else if (isProtected())
1301 OS << " [protected]";
1304 OS << " [artificial]";
1306 if (isForwardDecl())
1308 else if (getTag() == dwarf::DW_TAG_structure_type ||
1309 getTag() == dwarf::DW_TAG_union_type ||
1310 getTag() == dwarf::DW_TAG_enumeration_type ||
1311 getTag() == dwarf::DW_TAG_class_type)
1315 if (isStaticMember())
1318 if (isLValueReference())
1319 OS << " [reference]";
1321 if (isRValueReference())
1322 OS << " [rvalue reference]";
1325 void DIDerivedType::printInternal(raw_ostream &OS) const {
1326 DIType::printInternal(OS);
1327 OS << " [from " << getTypeDerivedFrom().getName() << ']';
1330 void DICompositeType::printInternal(raw_ostream &OS) const {
1331 DIType::printInternal(OS);
1332 DIArray A = getTypeArray();
1333 OS << " [" << A.getNumElements() << " elements]";
1336 void DINameSpace::printInternal(raw_ostream &OS) const {
1337 StringRef Name = getName();
1339 OS << " [" << Name << ']';
1341 OS << " [line " << getLineNumber() << ']';
1344 void DISubprogram::printInternal(raw_ostream &OS) const {
1345 // TODO : Print context
1346 OS << " [line " << getLineNumber() << ']';
1348 if (isLocalToUnit())
1354 if (getScopeLineNumber() != getLineNumber())
1355 OS << " [scope " << getScopeLineNumber() << "]";
1359 else if (isProtected())
1360 OS << " [protected]";
1362 if (isLValueReference())
1363 OS << " [reference]";
1365 if (isRValueReference())
1366 OS << " [rvalue reference]";
1368 StringRef Res = getName();
1370 OS << " [" << Res << ']';
1373 void DIGlobalVariable::printInternal(raw_ostream &OS) const {
1374 StringRef Res = getName();
1376 OS << " [" << Res << ']';
1378 OS << " [line " << getLineNumber() << ']';
1380 // TODO : Print context
1382 if (isLocalToUnit())
1389 void DIVariable::printInternal(raw_ostream &OS) const {
1390 StringRef Res = getName();
1392 OS << " [" << Res << ']';
1394 OS << " [line " << getLineNumber() << ']';
1397 void DIObjCProperty::printInternal(raw_ostream &OS) const {
1398 StringRef Name = getObjCPropertyName();
1400 OS << " [" << Name << ']';
1402 OS << " [line " << getLineNumber() << ", properties " << getUnsignedField(6)
1406 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
1407 const LLVMContext &Ctx) {
1408 if (!DL.isUnknown()) { // Print source line info.
1409 DIScope Scope(DL.getScope(Ctx));
1410 assert(Scope.isScope() && "Scope of a DebugLoc should be a DIScope.");
1411 // Omit the directory, because it's likely to be long and uninteresting.
1412 CommentOS << Scope.getFilename();
1413 CommentOS << ':' << DL.getLine();
1414 if (DL.getCol() != 0)
1415 CommentOS << ':' << DL.getCol();
1416 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx));
1417 if (!InlinedAtDL.isUnknown()) {
1418 CommentOS << " @[ ";
1419 printDebugLoc(InlinedAtDL, CommentOS, Ctx);
1425 void DIVariable::printExtendedName(raw_ostream &OS) const {
1426 const LLVMContext &Ctx = DbgNode->getContext();
1427 StringRef Res = getName();
1429 OS << Res << "," << getLineNumber();
1430 if (MDNode *InlinedAt = getInlinedAt()) {
1431 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(InlinedAt);
1432 if (!InlinedAtDL.isUnknown()) {
1434 printDebugLoc(InlinedAtDL, OS, Ctx);
1440 /// Specialize constructor to make sure it has the correct type.
1441 template <> DIRef<DIScope>::DIRef(const Value *V) : Val(V) {
1442 assert(isScopeRef(V) && "DIScopeRef should be a MDString or MDNode");
1444 template <> DIRef<DIType>::DIRef(const Value *V) : Val(V) {
1445 assert(isTypeRef(V) && "DITypeRef should be a MDString or MDNode");
1448 /// Specialize getFieldAs to handle fields that are references to DIScopes.
1450 DIScopeRef DIDescriptor::getFieldAs<DIScopeRef>(unsigned Elt) const {
1451 return DIScopeRef(getField(DbgNode, Elt));
1453 /// Specialize getFieldAs to handle fields that are references to DITypes.
1454 template <> DITypeRef DIDescriptor::getFieldAs<DITypeRef>(unsigned Elt) const {
1455 return DITypeRef(getField(DbgNode, Elt));
1458 /// Strip debug info in the module if it exists.
1459 /// To do this, we remove all calls to the debugger intrinsics and any named
1460 /// metadata for debugging. We also remove debug locations for instructions.
1461 /// Return true if module is modified.
1462 bool llvm::StripDebugInfo(Module &M) {
1464 bool Changed = false;
1466 // Remove all of the calls to the debugger intrinsics, and remove them from
1468 if (Function *Declare = M.getFunction("llvm.dbg.declare")) {
1469 while (!Declare->use_empty()) {
1470 CallInst *CI = cast<CallInst>(Declare->user_back());
1471 CI->eraseFromParent();
1473 Declare->eraseFromParent();
1477 if (Function *DbgVal = M.getFunction("llvm.dbg.value")) {
1478 while (!DbgVal->use_empty()) {
1479 CallInst *CI = cast<CallInst>(DbgVal->user_back());
1480 CI->eraseFromParent();
1482 DbgVal->eraseFromParent();
1486 for (Module::named_metadata_iterator NMI = M.named_metadata_begin(),
1487 NME = M.named_metadata_end(); NMI != NME;) {
1488 NamedMDNode *NMD = NMI;
1490 if (NMD->getName().startswith("llvm.dbg.")) {
1491 NMD->eraseFromParent();
1496 for (Module::iterator MI = M.begin(), ME = M.end(); MI != ME; ++MI)
1497 for (Function::iterator FI = MI->begin(), FE = MI->end(); FI != FE;
1499 for (BasicBlock::iterator BI = FI->begin(), BE = FI->end(); BI != BE;
1501 if (!BI->getDebugLoc().isUnknown()) {
1503 BI->setDebugLoc(DebugLoc());
1510 /// Return Debug Info Metadata Version by checking module flags.
1511 unsigned llvm::getDebugMetadataVersionFromModule(const Module &M) {
1512 Value *Val = M.getModuleFlag("Debug Info Version");
1515 return cast<ConstantInt>(Val)->getZExtValue();