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 Metadata *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 {
76 if (auto *C = getConstantField(Elt))
77 if (ConstantInt *CI = dyn_cast<ConstantInt>(C))
78 return CI->getZExtValue();
83 int64_t DIDescriptor::getInt64Field(unsigned Elt) const {
84 if (auto *C = getConstantField(Elt))
85 if (ConstantInt *CI = dyn_cast<ConstantInt>(C))
86 return CI->getZExtValue();
91 DIDescriptor DIDescriptor::getDescriptorField(unsigned Elt) const {
92 MDNode *Field = getNodeField(DbgNode, Elt);
93 return DIDescriptor(Field);
96 GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
97 return dyn_cast_or_null<GlobalVariable>(getConstantField(Elt));
100 Constant *DIDescriptor::getConstantField(unsigned Elt) const {
104 if (Elt < DbgNode->getNumOperands())
106 dyn_cast_or_null<ConstantAsMetadata>(DbgNode->getOperand(Elt)))
107 return C->getValue();
111 Function *DIDescriptor::getFunctionField(unsigned Elt) const {
112 return dyn_cast_or_null<Function>(getConstantField(Elt));
115 void DIDescriptor::replaceFunctionField(unsigned Elt, Function *F) {
119 if (Elt < DbgNode->getNumOperands()) {
120 MDNode *Node = const_cast<MDNode *>(DbgNode);
121 Node->replaceOperandWith(Elt, F ? ConstantAsMetadata::get(F) : nullptr);
125 static unsigned DIVariableInlinedAtIndex = 4;
126 MDNode *DIVariable::getInlinedAt() const {
127 return getNodeField(DbgNode, DIVariableInlinedAtIndex);
130 /// \brief Return the size reported by the variable's type.
131 unsigned DIVariable::getSizeInBits(const DITypeIdentifierMap &Map) {
132 DIType Ty = getType().resolve(Map);
133 // Follow derived types until we reach a type that
134 // reports back a size.
135 while (Ty.isDerivedType() && !Ty.getSizeInBits()) {
136 DIDerivedType DT(&*Ty);
137 Ty = DT.getTypeDerivedFrom().resolve(Map);
139 assert(Ty.getSizeInBits() && "type with size 0");
140 return Ty.getSizeInBits();
143 uint64_t DIExpression::getElement(unsigned Idx) const {
144 unsigned I = Idx + 1;
145 assert(I < getNumHeaderFields() &&
146 "non-existing complex address element requested");
147 return getHeaderFieldAs<int64_t>(I);
150 bool DIExpression::isBitPiece() const {
151 unsigned N = getNumElements();
152 return N >=3 && getElement(N-3) == dwarf::DW_OP_bit_piece;
155 uint64_t DIExpression::getBitPieceOffset() const {
156 assert(isBitPiece() && "not a piece");
157 return getElement(getNumElements()-2);
160 uint64_t DIExpression::getBitPieceSize() const {
161 assert(isBitPiece() && "not a piece");
162 return getElement(getNumElements()-1);
165 DIExpression::iterator DIExpression::begin() const {
166 return DIExpression::iterator(*this);
169 DIExpression::iterator DIExpression::end() const {
170 return DIExpression::iterator();
173 DIExpression::Operand DIExpression::Operand::getNext() const {
178 //===----------------------------------------------------------------------===//
180 //===----------------------------------------------------------------------===//
182 bool DIDescriptor::isSubroutineType() const {
183 return DbgNode && getTag() == dwarf::DW_TAG_subroutine_type;
186 bool DIDescriptor::isBasicType() const {
190 case dwarf::DW_TAG_base_type:
191 case dwarf::DW_TAG_unspecified_type:
198 bool DIDescriptor::isDerivedType() const {
202 case dwarf::DW_TAG_typedef:
203 case dwarf::DW_TAG_pointer_type:
204 case dwarf::DW_TAG_ptr_to_member_type:
205 case dwarf::DW_TAG_reference_type:
206 case dwarf::DW_TAG_rvalue_reference_type:
207 case dwarf::DW_TAG_const_type:
208 case dwarf::DW_TAG_volatile_type:
209 case dwarf::DW_TAG_restrict_type:
210 case dwarf::DW_TAG_member:
211 case dwarf::DW_TAG_inheritance:
212 case dwarf::DW_TAG_friend:
215 // CompositeTypes are currently modelled as DerivedTypes.
216 return isCompositeType();
220 bool DIDescriptor::isCompositeType() const {
224 case dwarf::DW_TAG_array_type:
225 case dwarf::DW_TAG_structure_type:
226 case dwarf::DW_TAG_union_type:
227 case dwarf::DW_TAG_enumeration_type:
228 case dwarf::DW_TAG_subroutine_type:
229 case dwarf::DW_TAG_class_type:
236 bool DIDescriptor::isVariable() const {
240 case dwarf::DW_TAG_auto_variable:
241 case dwarf::DW_TAG_arg_variable:
248 bool DIDescriptor::isType() const {
249 return isBasicType() || isCompositeType() || isDerivedType();
252 bool DIDescriptor::isSubprogram() const {
253 return DbgNode && getTag() == dwarf::DW_TAG_subprogram;
256 bool DIDescriptor::isGlobalVariable() const {
257 return DbgNode && getTag() == dwarf::DW_TAG_variable;
260 bool DIDescriptor::isScope() const {
264 case dwarf::DW_TAG_compile_unit:
265 case dwarf::DW_TAG_lexical_block:
266 case dwarf::DW_TAG_subprogram:
267 case dwarf::DW_TAG_namespace:
268 case dwarf::DW_TAG_file_type:
276 bool DIDescriptor::isTemplateTypeParameter() const {
277 return DbgNode && getTag() == dwarf::DW_TAG_template_type_parameter;
280 bool DIDescriptor::isTemplateValueParameter() const {
281 return DbgNode && (getTag() == dwarf::DW_TAG_template_value_parameter ||
282 getTag() == dwarf::DW_TAG_GNU_template_template_param ||
283 getTag() == dwarf::DW_TAG_GNU_template_parameter_pack);
286 bool DIDescriptor::isCompileUnit() const {
287 return DbgNode && getTag() == dwarf::DW_TAG_compile_unit;
290 bool DIDescriptor::isFile() const {
291 return DbgNode && getTag() == dwarf::DW_TAG_file_type;
294 bool DIDescriptor::isNameSpace() const {
295 return DbgNode && getTag() == dwarf::DW_TAG_namespace;
298 bool DIDescriptor::isLexicalBlockFile() const {
299 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
300 DbgNode->getNumOperands() == 3 && getNumHeaderFields() == 2;
303 bool DIDescriptor::isLexicalBlock() const {
304 // FIXME: There are always exactly 4 header fields in DILexicalBlock, but
305 // something relies on this returning true for DILexicalBlockFile.
306 return DbgNode && getTag() == dwarf::DW_TAG_lexical_block &&
307 DbgNode->getNumOperands() == 3 &&
308 (getNumHeaderFields() == 2 || getNumHeaderFields() == 4);
311 bool DIDescriptor::isSubrange() const {
312 return DbgNode && getTag() == dwarf::DW_TAG_subrange_type;
315 bool DIDescriptor::isEnumerator() const {
316 return DbgNode && getTag() == dwarf::DW_TAG_enumerator;
319 bool DIDescriptor::isObjCProperty() const {
320 return DbgNode && getTag() == dwarf::DW_TAG_APPLE_property;
323 bool DIDescriptor::isImportedEntity() const {
324 return DbgNode && (getTag() == dwarf::DW_TAG_imported_module ||
325 getTag() == dwarf::DW_TAG_imported_declaration);
328 bool DIDescriptor::isExpression() const {
329 return DbgNode && (getTag() == dwarf::DW_TAG_expression);
332 //===----------------------------------------------------------------------===//
333 // Simple Descriptor Constructors and other Methods
334 //===----------------------------------------------------------------------===//
336 void DIDescriptor::replaceAllUsesWith(LLVMContext &VMContext, DIDescriptor D) {
338 assert(DbgNode && "Trying to replace an unverified type!");
340 // Since we use a TrackingVH for the node, its easy for clients to manufacture
341 // legitimate situations where they want to replaceAllUsesWith() on something
342 // which, due to uniquing, has merged with the source. We shield clients from
343 // this detail by allowing a value to be replaced with replaceAllUsesWith()
345 const MDNode *DN = D;
347 SmallVector<Metadata *, 10> Ops(DbgNode->op_begin(), DbgNode->op_end());
348 DN = MDNode::get(VMContext, Ops);
351 assert(DbgNode->isTemporary() && "Expected temporary node");
352 auto *Node = const_cast<MDNode *>(DbgNode);
353 Node->replaceAllUsesWith(const_cast<MDNode *>(DN));
354 MDNode::deleteTemporary(Node);
358 void DIDescriptor::replaceAllUsesWith(MDNode *D) {
359 assert(DbgNode && "Trying to replace an unverified type!");
360 assert(DbgNode != D && "This replacement should always happen");
361 assert(DbgNode->isTemporary() && "Expected temporary node");
362 auto *Node = const_cast<MDNode *>(DbgNode);
363 Node->replaceAllUsesWith(D);
364 MDNode::deleteTemporary(Node);
367 bool DICompileUnit::Verify() const {
368 if (!isCompileUnit())
371 // Don't bother verifying the compilation directory or producer string
372 // as those could be empty.
373 if (getFilename().empty())
376 return DbgNode->getNumOperands() == 7 && getNumHeaderFields() == 8;
379 bool DIObjCProperty::Verify() const {
380 if (!isObjCProperty())
383 // Don't worry about the rest of the strings for now.
384 return DbgNode->getNumOperands() == 3 && getNumHeaderFields() == 6;
387 /// \brief Check if a field at position Elt of a MDNode is a MDNode.
389 /// We currently allow an empty string and an integer.
390 /// But we don't allow a non-empty string in a MDNode field.
391 static bool fieldIsMDNode(const MDNode *DbgNode, unsigned Elt) {
392 // FIXME: This function should return true, if the field is null or the field
393 // is indeed a MDNode: return !Fld || isa<MDNode>(Fld).
394 Metadata *Fld = getField(DbgNode, Elt);
395 if (Fld && isa<MDString>(Fld) && !cast<MDString>(Fld)->getString().empty())
400 /// \brief Check if a field at position Elt of a MDNode is a MDString.
401 static bool fieldIsMDString(const MDNode *DbgNode, unsigned Elt) {
402 Metadata *Fld = getField(DbgNode, Elt);
403 return !Fld || isa<MDString>(Fld);
406 /// \brief Check if a value can be a reference to a type.
407 static bool isTypeRef(const Metadata *MD) {
410 if (auto *S = dyn_cast<MDString>(MD))
411 return !S->getString().empty();
412 if (auto *N = dyn_cast<MDNode>(MD))
413 return DIType(N).isType();
417 /// \brief Check if referenced field might be a type.
418 static bool fieldIsTypeRef(const MDNode *DbgNode, unsigned Elt) {
419 return isTypeRef(dyn_cast_or_null<Metadata>(getField(DbgNode, Elt)));
422 /// \brief Check if a value can be a ScopeRef.
423 static bool isScopeRef(const Metadata *MD) {
426 if (auto *S = dyn_cast<MDString>(MD))
427 return !S->getString().empty();
428 return isa<MDNode>(MD);
431 /// \brief Check if a field at position Elt of a MDNode can be a ScopeRef.
432 static bool fieldIsScopeRef(const MDNode *DbgNode, unsigned Elt) {
433 return isScopeRef(dyn_cast_or_null<Metadata>(getField(DbgNode, Elt)));
436 bool DIType::Verify() const {
439 // Make sure Context @ field 2 is MDNode.
440 if (!fieldIsScopeRef(DbgNode, 2))
443 // FIXME: Sink this into the various subclass verifies.
444 uint16_t Tag = getTag();
445 if (!isBasicType() && Tag != dwarf::DW_TAG_const_type &&
446 Tag != dwarf::DW_TAG_volatile_type && Tag != dwarf::DW_TAG_pointer_type &&
447 Tag != dwarf::DW_TAG_ptr_to_member_type &&
448 Tag != dwarf::DW_TAG_reference_type &&
449 Tag != dwarf::DW_TAG_rvalue_reference_type &&
450 Tag != dwarf::DW_TAG_restrict_type && Tag != dwarf::DW_TAG_array_type &&
451 Tag != dwarf::DW_TAG_enumeration_type &&
452 Tag != dwarf::DW_TAG_subroutine_type &&
453 Tag != dwarf::DW_TAG_inheritance && Tag != dwarf::DW_TAG_friend &&
454 getFilename().empty())
457 // DIType is abstract, it should be a BasicType, a DerivedType or
460 return DIBasicType(DbgNode).Verify();
461 else if (isCompositeType())
462 return DICompositeType(DbgNode).Verify();
463 else if (isDerivedType())
464 return DIDerivedType(DbgNode).Verify();
469 bool DIBasicType::Verify() const {
470 return isBasicType() && DbgNode->getNumOperands() == 3 &&
471 getNumHeaderFields() == 8;
474 bool DIDerivedType::Verify() const {
475 // Make sure DerivedFrom @ field 3 is TypeRef.
476 if (!fieldIsTypeRef(DbgNode, 3))
478 if (getTag() == dwarf::DW_TAG_ptr_to_member_type)
479 // Make sure ClassType @ field 4 is a TypeRef.
480 if (!fieldIsTypeRef(DbgNode, 4))
483 return isDerivedType() && DbgNode->getNumOperands() >= 4 &&
484 DbgNode->getNumOperands() <= 8 && getNumHeaderFields() >= 7 &&
485 getNumHeaderFields() <= 8;
488 bool DICompositeType::Verify() const {
489 if (!isCompositeType())
492 // Make sure DerivedFrom @ field 3 and ContainingType @ field 5 are TypeRef.
493 if (!fieldIsTypeRef(DbgNode, 3))
495 if (!fieldIsTypeRef(DbgNode, 5))
498 // Make sure the type identifier at field 7 is MDString, it can be null.
499 if (!fieldIsMDString(DbgNode, 7))
502 // A subroutine type can't be both & and &&.
503 if (isLValueReference() && isRValueReference())
506 return DbgNode->getNumOperands() == 8 && getNumHeaderFields() == 8;
509 bool DISubprogram::Verify() const {
513 // Make sure context @ field 2 is a ScopeRef and type @ field 3 is a MDNode.
514 if (!fieldIsScopeRef(DbgNode, 2))
516 if (!fieldIsMDNode(DbgNode, 3))
518 // Containing type @ field 4.
519 if (!fieldIsTypeRef(DbgNode, 4))
522 // A subprogram can't be both & and &&.
523 if (isLValueReference() && isRValueReference())
526 // If a DISubprogram has an llvm::Function*, then scope chains from all
527 // instructions within the function should lead to this DISubprogram.
528 if (auto *F = getFunction()) {
529 for (auto &BB : *F) {
531 DebugLoc DL = I.getDebugLoc();
535 MDNode *Scope = nullptr;
536 MDNode *IA = nullptr;
537 // walk the inlined-at scopes
538 while ((IA = DL.getInlinedAt()))
539 DL = DebugLoc::getFromDILocation(IA);
540 DL.getScopeAndInlinedAt(Scope, IA);
544 while (!DIDescriptor(Scope).isSubprogram()) {
545 DILexicalBlockFile D(Scope);
546 Scope = D.isLexicalBlockFile()
548 : DebugLoc::getFromDILexicalBlock(Scope).getScope();
552 if (!DISubprogram(Scope).describes(F))
557 return DbgNode->getNumOperands() == 9 && getNumHeaderFields() == 12;
560 bool DIGlobalVariable::Verify() const {
561 if (!isGlobalVariable())
564 if (getDisplayName().empty())
566 // Make sure context @ field 1 is an MDNode.
567 if (!fieldIsMDNode(DbgNode, 1))
569 // Make sure that type @ field 3 is a DITypeRef.
570 if (!fieldIsTypeRef(DbgNode, 3))
572 // Make sure StaticDataMemberDeclaration @ field 5 is MDNode.
573 if (!fieldIsMDNode(DbgNode, 5))
576 return DbgNode->getNumOperands() == 6 && getNumHeaderFields() == 7;
579 bool DIVariable::Verify() const {
583 // Make sure context @ field 1 is an MDNode.
584 if (!fieldIsMDNode(DbgNode, 1))
586 // Make sure that type @ field 3 is a DITypeRef.
587 if (!fieldIsTypeRef(DbgNode, 3))
590 // Check the number of header fields, which is common between complex and
592 if (getNumHeaderFields() != 4)
595 // Variable without an inline location.
596 if (DbgNode->getNumOperands() == 4)
599 // Variable with an inline location.
600 return getInlinedAt() != nullptr && DbgNode->getNumOperands() == 5;
603 bool DIExpression::Verify() const {
604 // Empty DIExpressions may be represented as a nullptr.
608 if (!(isExpression() && DbgNode->getNumOperands() == 1))
611 for (auto Op : *this)
613 case DW_OP_bit_piece:
614 // Must be the last element of the expression.
615 return std::distance(Op.getBase(), DIHeaderFieldIterator()) == 3;
617 if (std::distance(Op.getBase(), DIHeaderFieldIterator()) < 2)
623 // Other operators are not yet supported by the backend.
629 bool DILocation::Verify() const {
630 return DbgNode && isa<MDLocation>(DbgNode);
633 bool DINameSpace::Verify() const {
636 return DbgNode->getNumOperands() == 3 && getNumHeaderFields() == 3;
639 MDNode *DIFile::getFileNode() const { return getNodeField(DbgNode, 1); }
641 bool DIFile::Verify() const {
642 return isFile() && DbgNode->getNumOperands() == 2;
645 bool DIEnumerator::Verify() const {
646 return isEnumerator() && DbgNode->getNumOperands() == 1 &&
647 getNumHeaderFields() == 3;
650 bool DISubrange::Verify() const {
651 return isSubrange() && DbgNode->getNumOperands() == 1 &&
652 getNumHeaderFields() == 3;
655 bool DILexicalBlock::Verify() const {
656 return isLexicalBlock() && DbgNode->getNumOperands() == 3 &&
657 getNumHeaderFields() == 4;
660 bool DILexicalBlockFile::Verify() const {
661 return isLexicalBlockFile() && DbgNode->getNumOperands() == 3 &&
662 getNumHeaderFields() == 2;
665 bool DITemplateTypeParameter::Verify() const {
666 return isTemplateTypeParameter() && DbgNode->getNumOperands() == 4 &&
667 getNumHeaderFields() == 4;
670 bool DITemplateValueParameter::Verify() const {
671 return isTemplateValueParameter() && DbgNode->getNumOperands() == 5 &&
672 getNumHeaderFields() == 4;
675 bool DIImportedEntity::Verify() const {
676 return isImportedEntity() && DbgNode->getNumOperands() == 3 &&
677 getNumHeaderFields() == 3;
680 MDNode *DIDerivedType::getObjCProperty() const {
681 return getNodeField(DbgNode, 4);
684 MDString *DICompositeType::getIdentifier() const {
685 return cast_or_null<MDString>(getField(DbgNode, 7));
689 static void VerifySubsetOf(const MDNode *LHS, const MDNode *RHS) {
690 for (unsigned i = 0; i != LHS->getNumOperands(); ++i) {
691 // Skip the 'empty' list (that's a single i32 0, rather than truly empty).
692 if (i == 0 && mdconst::hasa<ConstantInt>(LHS->getOperand(i)))
694 const MDNode *E = cast<MDNode>(LHS->getOperand(i));
696 for (unsigned j = 0; !found && j != RHS->getNumOperands(); ++j)
697 found = (E == cast<MDNode>(RHS->getOperand(j)));
698 assert(found && "Losing a member during member list replacement");
703 void DICompositeType::setArraysHelper(MDNode *Elements, MDNode *TParams) {
704 TrackingMDNodeRef N(*this);
707 // Check that the new list of members contains all the old members as well.
708 if (const MDNode *El = cast_or_null<MDNode>(N->getOperand(4)))
709 VerifySubsetOf(El, Elements);
711 N->replaceOperandWith(4, Elements);
714 N->replaceOperandWith(6, TParams);
718 DIScopeRef DIScope::getRef() const {
719 if (!isCompositeType())
720 return DIScopeRef(*this);
721 DICompositeType DTy(DbgNode);
722 if (!DTy.getIdentifier())
723 return DIScopeRef(*this);
724 return DIScopeRef(DTy.getIdentifier());
727 void DICompositeType::setContainingType(DICompositeType ContainingType) {
728 TrackingMDNodeRef N(*this);
729 N->replaceOperandWith(5, ContainingType.getRef());
733 bool DIVariable::isInlinedFnArgument(const Function *CurFn) {
734 assert(CurFn && "Invalid function");
735 if (!getContext().isSubprogram())
737 // This variable is not inlined function argument if its scope
738 // does not describe current function.
739 return !DISubprogram(getContext()).describes(CurFn);
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 MDNode *DISubprogram::getVariablesNodes() const {
755 return getNodeField(DbgNode, 8);
758 DIArray DISubprogram::getVariables() const {
759 return DIArray(getNodeField(DbgNode, 8));
762 Metadata *DITemplateValueParameter::getValue() const {
763 return DbgNode->getOperand(3);
766 DIScopeRef DIScope::getContext() const {
769 return DIType(DbgNode).getContext();
772 return DIScopeRef(DISubprogram(DbgNode).getContext());
774 if (isLexicalBlock())
775 return DIScopeRef(DILexicalBlock(DbgNode).getContext());
777 if (isLexicalBlockFile())
778 return DIScopeRef(DILexicalBlockFile(DbgNode).getContext());
781 return DIScopeRef(DINameSpace(DbgNode).getContext());
783 assert((isFile() || isCompileUnit()) && "Unhandled type of scope.");
784 return DIScopeRef(nullptr);
787 StringRef DIScope::getName() const {
789 return DIType(DbgNode).getName();
791 return DISubprogram(DbgNode).getName();
793 return DINameSpace(DbgNode).getName();
794 assert((isLexicalBlock() || isLexicalBlockFile() || isFile() ||
796 "Unhandled type of scope.");
800 StringRef DIScope::getFilename() const {
803 return ::getStringField(getNodeField(DbgNode, 1), 0);
806 StringRef DIScope::getDirectory() const {
809 return ::getStringField(getNodeField(DbgNode, 1), 1);
812 DIArray DICompileUnit::getEnumTypes() const {
813 if (!DbgNode || DbgNode->getNumOperands() < 7)
816 return DIArray(getNodeField(DbgNode, 2));
819 DIArray DICompileUnit::getRetainedTypes() const {
820 if (!DbgNode || DbgNode->getNumOperands() < 7)
823 return DIArray(getNodeField(DbgNode, 3));
826 DIArray DICompileUnit::getSubprograms() const {
827 if (!DbgNode || DbgNode->getNumOperands() < 7)
830 return DIArray(getNodeField(DbgNode, 4));
833 DIArray DICompileUnit::getGlobalVariables() const {
834 if (!DbgNode || DbgNode->getNumOperands() < 7)
837 return DIArray(getNodeField(DbgNode, 5));
840 DIArray DICompileUnit::getImportedEntities() const {
841 if (!DbgNode || DbgNode->getNumOperands() < 7)
844 return DIArray(getNodeField(DbgNode, 6));
847 void DICompileUnit::replaceSubprograms(DIArray Subprograms) {
848 assert(Verify() && "Expected compile unit");
849 if (Subprograms == getSubprograms())
852 const_cast<MDNode *>(DbgNode)->replaceOperandWith(4, Subprograms);
855 void DICompileUnit::replaceGlobalVariables(DIArray GlobalVariables) {
856 assert(Verify() && "Expected compile unit");
857 if (GlobalVariables == getGlobalVariables())
860 const_cast<MDNode *>(DbgNode)->replaceOperandWith(5, GlobalVariables);
863 DILocation DILocation::copyWithNewScope(LLVMContext &Ctx,
864 DILexicalBlockFile NewScope) {
866 assert(NewScope && "Expected valid scope");
868 const auto *Old = cast<MDLocation>(DbgNode);
869 return DILocation(MDLocation::get(Ctx, Old->getLine(), Old->getColumn(),
870 NewScope, Old->getInlinedAt()));
873 unsigned DILocation::computeNewDiscriminator(LLVMContext &Ctx) {
874 std::pair<const char *, unsigned> Key(getFilename().data(), getLineNumber());
875 return ++Ctx.pImpl->DiscriminatorTable[Key];
878 DIVariable llvm::createInlinedVariable(MDNode *DV, MDNode *InlinedScope,
879 LLVMContext &VMContext) {
880 assert(DIVariable(DV).Verify() && "Expected a DIVariable");
882 return cleanseInlinedVariable(DV, VMContext);
884 // Insert inlined scope.
885 SmallVector<Metadata *, 8> Elts(DV->op_begin(),
886 DV->op_begin() + DIVariableInlinedAtIndex);
887 Elts.push_back(InlinedScope);
889 DIVariable Inlined(MDNode::get(VMContext, Elts));
890 assert(Inlined.Verify() && "Expected to create a DIVariable");
894 DIVariable llvm::cleanseInlinedVariable(MDNode *DV, LLVMContext &VMContext) {
895 assert(DIVariable(DV).Verify() && "Expected a DIVariable");
896 if (!DIVariable(DV).getInlinedAt())
897 return DIVariable(DV);
899 // Remove inlined scope.
900 SmallVector<Metadata *, 8> Elts(DV->op_begin(),
901 DV->op_begin() + DIVariableInlinedAtIndex);
903 DIVariable Cleansed(MDNode::get(VMContext, Elts));
904 assert(Cleansed.Verify() && "Expected to create a DIVariable");
908 DISubprogram llvm::getDISubprogram(const MDNode *Scope) {
909 DIDescriptor D(Scope);
910 if (D.isSubprogram())
911 return DISubprogram(Scope);
913 if (D.isLexicalBlockFile())
914 return getDISubprogram(DILexicalBlockFile(Scope).getContext());
916 if (D.isLexicalBlock())
917 return getDISubprogram(DILexicalBlock(Scope).getContext());
919 return DISubprogram();
922 DISubprogram llvm::getDISubprogram(const Function *F) {
923 // We look for the first instr that has a debug annotation leading back to F.
924 for (auto &BB : *F) {
925 auto Inst = std::find_if(BB.begin(), BB.end(), [](const Instruction &Inst) {
926 return !Inst.getDebugLoc().isUnknown();
928 if (Inst == BB.end())
930 DebugLoc DLoc = Inst->getDebugLoc();
931 const MDNode *Scope = DLoc.getScopeNode();
932 DISubprogram Subprogram = getDISubprogram(Scope);
933 return Subprogram.describes(F) ? Subprogram : DISubprogram();
936 return DISubprogram();
939 DICompositeType llvm::getDICompositeType(DIType T) {
940 if (T.isCompositeType())
941 return DICompositeType(T);
943 if (T.isDerivedType()) {
944 // This function is currently used by dragonegg and dragonegg does
945 // not generate identifier for types, so using an empty map to resolve
946 // DerivedFrom should be fine.
947 DITypeIdentifierMap EmptyMap;
948 return getDICompositeType(
949 DIDerivedType(T).getTypeDerivedFrom().resolve(EmptyMap));
952 return DICompositeType();
956 llvm::generateDITypeIdentifierMap(const NamedMDNode *CU_Nodes) {
957 DITypeIdentifierMap Map;
958 for (unsigned CUi = 0, CUe = CU_Nodes->getNumOperands(); CUi != CUe; ++CUi) {
959 DICompileUnit CU(CU_Nodes->getOperand(CUi));
960 DIArray Retain = CU.getRetainedTypes();
961 for (unsigned Ti = 0, Te = Retain.getNumElements(); Ti != Te; ++Ti) {
962 if (!Retain.getElement(Ti).isCompositeType())
964 DICompositeType Ty(Retain.getElement(Ti));
965 if (MDString *TypeId = Ty.getIdentifier()) {
966 // Definition has priority over declaration.
967 // Try to insert (TypeId, Ty) to Map.
968 std::pair<DITypeIdentifierMap::iterator, bool> P =
969 Map.insert(std::make_pair(TypeId, Ty));
970 // If TypeId already exists in Map and this is a definition, replace
971 // whatever we had (declaration or definition) with the definition.
972 if (!P.second && !Ty.isForwardDecl())
973 P.first->second = Ty;
980 //===----------------------------------------------------------------------===//
981 // DebugInfoFinder implementations.
982 //===----------------------------------------------------------------------===//
984 void DebugInfoFinder::reset() {
991 TypeIdentifierMap.clear();
992 TypeMapInitialized = false;
995 void DebugInfoFinder::InitializeTypeMap(const Module &M) {
996 if (!TypeMapInitialized)
997 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
998 TypeIdentifierMap = generateDITypeIdentifierMap(CU_Nodes);
999 TypeMapInitialized = true;
1003 void DebugInfoFinder::processModule(const Module &M) {
1004 InitializeTypeMap(M);
1005 if (NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu")) {
1006 for (unsigned i = 0, e = CU_Nodes->getNumOperands(); i != e; ++i) {
1007 DICompileUnit CU(CU_Nodes->getOperand(i));
1009 DIArray GVs = CU.getGlobalVariables();
1010 for (unsigned i = 0, e = GVs.getNumElements(); i != e; ++i) {
1011 DIGlobalVariable DIG(GVs.getElement(i));
1012 if (addGlobalVariable(DIG)) {
1013 processScope(DIG.getContext());
1014 processType(DIG.getType().resolve(TypeIdentifierMap));
1017 DIArray SPs = CU.getSubprograms();
1018 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i)
1019 processSubprogram(DISubprogram(SPs.getElement(i)));
1020 DIArray EnumTypes = CU.getEnumTypes();
1021 for (unsigned i = 0, e = EnumTypes.getNumElements(); i != e; ++i)
1022 processType(DIType(EnumTypes.getElement(i)));
1023 DIArray RetainedTypes = CU.getRetainedTypes();
1024 for (unsigned i = 0, e = RetainedTypes.getNumElements(); i != e; ++i)
1025 processType(DIType(RetainedTypes.getElement(i)));
1026 DIArray Imports = CU.getImportedEntities();
1027 for (unsigned i = 0, e = Imports.getNumElements(); i != e; ++i) {
1028 DIImportedEntity Import = DIImportedEntity(Imports.getElement(i));
1029 DIDescriptor Entity = Import.getEntity().resolve(TypeIdentifierMap);
1030 if (Entity.isType())
1031 processType(DIType(Entity));
1032 else if (Entity.isSubprogram())
1033 processSubprogram(DISubprogram(Entity));
1034 else if (Entity.isNameSpace())
1035 processScope(DINameSpace(Entity).getContext());
1041 void DebugInfoFinder::processLocation(const Module &M, DILocation Loc) {
1044 InitializeTypeMap(M);
1045 processScope(Loc.getScope());
1046 processLocation(M, Loc.getOrigLocation());
1049 void DebugInfoFinder::processType(DIType DT) {
1052 processScope(DT.getContext().resolve(TypeIdentifierMap));
1053 if (DT.isCompositeType()) {
1054 DICompositeType DCT(DT);
1055 processType(DCT.getTypeDerivedFrom().resolve(TypeIdentifierMap));
1056 if (DT.isSubroutineType()) {
1057 DITypeArray DTA = DISubroutineType(DT).getTypeArray();
1058 for (unsigned i = 0, e = DTA.getNumElements(); i != e; ++i)
1059 processType(DTA.getElement(i).resolve(TypeIdentifierMap));
1062 DIArray DA = DCT.getElements();
1063 for (unsigned i = 0, e = DA.getNumElements(); i != e; ++i) {
1064 DIDescriptor D = DA.getElement(i);
1066 processType(DIType(D));
1067 else if (D.isSubprogram())
1068 processSubprogram(DISubprogram(D));
1070 } else if (DT.isDerivedType()) {
1071 DIDerivedType DDT(DT);
1072 processType(DDT.getTypeDerivedFrom().resolve(TypeIdentifierMap));
1076 void DebugInfoFinder::processScope(DIScope Scope) {
1077 if (Scope.isType()) {
1082 if (Scope.isCompileUnit()) {
1083 addCompileUnit(DICompileUnit(Scope));
1086 if (Scope.isSubprogram()) {
1087 processSubprogram(DISubprogram(Scope));
1090 if (!addScope(Scope))
1092 if (Scope.isLexicalBlock()) {
1093 DILexicalBlock LB(Scope);
1094 processScope(LB.getContext());
1095 } else if (Scope.isLexicalBlockFile()) {
1096 DILexicalBlockFile LBF = DILexicalBlockFile(Scope);
1097 processScope(LBF.getScope());
1098 } else if (Scope.isNameSpace()) {
1099 DINameSpace NS(Scope);
1100 processScope(NS.getContext());
1104 void DebugInfoFinder::processSubprogram(DISubprogram SP) {
1105 if (!addSubprogram(SP))
1107 processScope(SP.getContext().resolve(TypeIdentifierMap));
1108 processType(SP.getType());
1109 DIArray TParams = SP.getTemplateParams();
1110 for (unsigned I = 0, E = TParams.getNumElements(); I != E; ++I) {
1111 DIDescriptor Element = TParams.getElement(I);
1112 if (Element.isTemplateTypeParameter()) {
1113 DITemplateTypeParameter TType(Element);
1114 processScope(TType.getContext().resolve(TypeIdentifierMap));
1115 processType(TType.getType().resolve(TypeIdentifierMap));
1116 } else if (Element.isTemplateValueParameter()) {
1117 DITemplateValueParameter TVal(Element);
1118 processScope(TVal.getContext().resolve(TypeIdentifierMap));
1119 processType(TVal.getType().resolve(TypeIdentifierMap));
1124 void DebugInfoFinder::processDeclare(const Module &M,
1125 const DbgDeclareInst *DDI) {
1126 MDNode *N = dyn_cast<MDNode>(DDI->getVariable());
1129 InitializeTypeMap(M);
1132 if (!DV.isVariable())
1135 if (!NodesSeen.insert(DV).second)
1137 processScope(DIVariable(N).getContext());
1138 processType(DIVariable(N).getType().resolve(TypeIdentifierMap));
1141 void DebugInfoFinder::processValue(const Module &M, const DbgValueInst *DVI) {
1142 MDNode *N = dyn_cast<MDNode>(DVI->getVariable());
1145 InitializeTypeMap(M);
1148 if (!DV.isVariable())
1151 if (!NodesSeen.insert(DV).second)
1153 processScope(DIVariable(N).getContext());
1154 processType(DIVariable(N).getType().resolve(TypeIdentifierMap));
1157 bool DebugInfoFinder::addType(DIType DT) {
1161 if (!NodesSeen.insert(DT).second)
1168 bool DebugInfoFinder::addCompileUnit(DICompileUnit CU) {
1171 if (!NodesSeen.insert(CU).second)
1178 bool DebugInfoFinder::addGlobalVariable(DIGlobalVariable DIG) {
1182 if (!NodesSeen.insert(DIG).second)
1189 bool DebugInfoFinder::addSubprogram(DISubprogram SP) {
1193 if (!NodesSeen.insert(SP).second)
1200 bool DebugInfoFinder::addScope(DIScope Scope) {
1203 // FIXME: Ocaml binding generates a scope with no content, we treat it
1205 if (Scope->getNumOperands() == 0)
1207 if (!NodesSeen.insert(Scope).second)
1209 Scopes.push_back(Scope);
1213 //===----------------------------------------------------------------------===//
1214 // DIDescriptor: dump routines for all descriptors.
1215 //===----------------------------------------------------------------------===//
1217 void DIDescriptor::dump() const {
1222 void DIDescriptor::print(raw_ostream &OS) const {
1226 if (const char *Tag = dwarf::TagString(getTag()))
1227 OS << "[ " << Tag << " ]";
1229 if (this->isSubrange()) {
1230 DISubrange(DbgNode).printInternal(OS);
1231 } else if (this->isCompileUnit()) {
1232 DICompileUnit(DbgNode).printInternal(OS);
1233 } else if (this->isFile()) {
1234 DIFile(DbgNode).printInternal(OS);
1235 } else if (this->isEnumerator()) {
1236 DIEnumerator(DbgNode).printInternal(OS);
1237 } else if (this->isBasicType()) {
1238 DIType(DbgNode).printInternal(OS);
1239 } else if (this->isDerivedType()) {
1240 DIDerivedType(DbgNode).printInternal(OS);
1241 } else if (this->isCompositeType()) {
1242 DICompositeType(DbgNode).printInternal(OS);
1243 } else if (this->isSubprogram()) {
1244 DISubprogram(DbgNode).printInternal(OS);
1245 } else if (this->isGlobalVariable()) {
1246 DIGlobalVariable(DbgNode).printInternal(OS);
1247 } else if (this->isVariable()) {
1248 DIVariable(DbgNode).printInternal(OS);
1249 } else if (this->isObjCProperty()) {
1250 DIObjCProperty(DbgNode).printInternal(OS);
1251 } else if (this->isNameSpace()) {
1252 DINameSpace(DbgNode).printInternal(OS);
1253 } else if (this->isScope()) {
1254 DIScope(DbgNode).printInternal(OS);
1255 } else if (this->isExpression()) {
1256 DIExpression(DbgNode).printInternal(OS);
1260 void DISubrange::printInternal(raw_ostream &OS) const {
1261 int64_t Count = getCount();
1263 OS << " [" << getLo() << ", " << Count - 1 << ']';
1265 OS << " [unbounded]";
1268 void DIScope::printInternal(raw_ostream &OS) const {
1269 OS << " [" << getDirectory() << "/" << getFilename() << ']';
1272 void DICompileUnit::printInternal(raw_ostream &OS) const {
1273 DIScope::printInternal(OS);
1275 unsigned Lang = getLanguage();
1276 if (const char *LangStr = dwarf::LanguageString(Lang))
1279 (OS << "lang 0x").write_hex(Lang);
1283 void DIEnumerator::printInternal(raw_ostream &OS) const {
1284 OS << " [" << getName() << " :: " << getEnumValue() << ']';
1287 void DIType::printInternal(raw_ostream &OS) const {
1291 StringRef Res = getName();
1293 OS << " [" << Res << "]";
1295 // TODO: Print context?
1297 OS << " [line " << getLineNumber() << ", size " << getSizeInBits()
1298 << ", align " << getAlignInBits() << ", offset " << getOffsetInBits();
1300 if (const char *Enc =
1301 dwarf::AttributeEncodingString(DIBasicType(DbgNode).getEncoding()))
1302 OS << ", enc " << Enc;
1307 else if (isProtected())
1308 OS << " [protected]";
1309 else if (isPublic())
1313 OS << " [artificial]";
1315 if (isForwardDecl())
1317 else if (getTag() == dwarf::DW_TAG_structure_type ||
1318 getTag() == dwarf::DW_TAG_union_type ||
1319 getTag() == dwarf::DW_TAG_enumeration_type ||
1320 getTag() == dwarf::DW_TAG_class_type)
1324 if (isStaticMember())
1327 if (isLValueReference())
1328 OS << " [reference]";
1330 if (isRValueReference())
1331 OS << " [rvalue reference]";
1334 void DIDerivedType::printInternal(raw_ostream &OS) const {
1335 DIType::printInternal(OS);
1336 OS << " [from " << getTypeDerivedFrom().getName() << ']';
1339 void DICompositeType::printInternal(raw_ostream &OS) const {
1340 DIType::printInternal(OS);
1341 DIArray A = getElements();
1342 OS << " [" << A.getNumElements() << " elements]";
1345 void DINameSpace::printInternal(raw_ostream &OS) const {
1346 StringRef Name = getName();
1348 OS << " [" << Name << ']';
1350 OS << " [line " << getLineNumber() << ']';
1353 void DISubprogram::printInternal(raw_ostream &OS) const {
1354 // TODO : Print context
1355 OS << " [line " << getLineNumber() << ']';
1357 if (isLocalToUnit())
1363 if (getScopeLineNumber() != getLineNumber())
1364 OS << " [scope " << getScopeLineNumber() << "]";
1368 else if (isProtected())
1369 OS << " [protected]";
1370 else if (isPublic())
1373 if (isLValueReference())
1374 OS << " [reference]";
1376 if (isRValueReference())
1377 OS << " [rvalue reference]";
1379 StringRef Res = getName();
1381 OS << " [" << Res << ']';
1384 void DIGlobalVariable::printInternal(raw_ostream &OS) const {
1385 StringRef Res = getName();
1387 OS << " [" << Res << ']';
1389 OS << " [line " << getLineNumber() << ']';
1391 // TODO : Print context
1393 if (isLocalToUnit())
1400 void DIVariable::printInternal(raw_ostream &OS) const {
1401 StringRef Res = getName();
1403 OS << " [" << Res << ']';
1405 OS << " [line " << getLineNumber() << ']';
1408 void DIExpression::printInternal(raw_ostream &OS) const {
1409 for (auto Op : *this) {
1410 OS << " [" << OperationEncodingString(Op);
1413 OS << " " << Op.getArg(1);
1416 case DW_OP_bit_piece: {
1417 OS << " offset=" << Op.getArg(1) << ", size=" << Op.getArg(2);
1424 llvm_unreachable("unhandled operation");
1430 void DIObjCProperty::printInternal(raw_ostream &OS) const {
1431 StringRef Name = getObjCPropertyName();
1433 OS << " [" << Name << ']';
1435 OS << " [line " << getLineNumber() << ", properties " << getUnsignedField(6)
1439 static void printDebugLoc(DebugLoc DL, raw_ostream &CommentOS,
1440 const LLVMContext &Ctx) {
1441 if (!DL.isUnknown()) { // Print source line info.
1442 DIScope Scope(DL.getScope(Ctx));
1443 assert(Scope.isScope() && "Scope of a DebugLoc should be a DIScope.");
1444 // Omit the directory, because it's likely to be long and uninteresting.
1445 CommentOS << Scope.getFilename();
1446 CommentOS << ':' << DL.getLine();
1447 if (DL.getCol() != 0)
1448 CommentOS << ':' << DL.getCol();
1449 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(DL.getInlinedAt(Ctx));
1450 if (!InlinedAtDL.isUnknown()) {
1451 CommentOS << " @[ ";
1452 printDebugLoc(InlinedAtDL, CommentOS, Ctx);
1458 void DIVariable::printExtendedName(raw_ostream &OS) const {
1459 const LLVMContext &Ctx = DbgNode->getContext();
1460 StringRef Res = getName();
1462 OS << Res << "," << getLineNumber();
1463 if (MDNode *InlinedAt = getInlinedAt()) {
1464 DebugLoc InlinedAtDL = DebugLoc::getFromDILocation(InlinedAt);
1465 if (!InlinedAtDL.isUnknown()) {
1467 printDebugLoc(InlinedAtDL, OS, Ctx);
1473 template <> DIRef<DIScope>::DIRef(const Metadata *V) : Val(V) {
1474 assert(isScopeRef(V) && "DIScopeRef should be a MDString or MDNode");
1476 template <> DIRef<DIType>::DIRef(const Metadata *V) : Val(V) {
1477 assert(isTypeRef(V) && "DITypeRef should be a MDString or MDNode");
1481 DIScopeRef DIDescriptor::getFieldAs<DIScopeRef>(unsigned Elt) const {
1482 return DIScopeRef(cast_or_null<Metadata>(getField(DbgNode, Elt)));
1484 template <> DITypeRef DIDescriptor::getFieldAs<DITypeRef>(unsigned Elt) const {
1485 return DITypeRef(cast_or_null<Metadata>(getField(DbgNode, Elt)));
1488 bool llvm::StripDebugInfo(Module &M) {
1489 bool Changed = false;
1491 // Remove all of the calls to the debugger intrinsics, and remove them from
1493 if (Function *Declare = M.getFunction("llvm.dbg.declare")) {
1494 while (!Declare->use_empty()) {
1495 CallInst *CI = cast<CallInst>(Declare->user_back());
1496 CI->eraseFromParent();
1498 Declare->eraseFromParent();
1502 if (Function *DbgVal = M.getFunction("llvm.dbg.value")) {
1503 while (!DbgVal->use_empty()) {
1504 CallInst *CI = cast<CallInst>(DbgVal->user_back());
1505 CI->eraseFromParent();
1507 DbgVal->eraseFromParent();
1511 for (Module::named_metadata_iterator NMI = M.named_metadata_begin(),
1512 NME = M.named_metadata_end(); NMI != NME;) {
1513 NamedMDNode *NMD = NMI;
1515 if (NMD->getName().startswith("llvm.dbg.")) {
1516 NMD->eraseFromParent();
1521 for (Module::iterator MI = M.begin(), ME = M.end(); MI != ME; ++MI)
1522 for (Function::iterator FI = MI->begin(), FE = MI->end(); FI != FE;
1524 for (BasicBlock::iterator BI = FI->begin(), BE = FI->end(); BI != BE;
1526 if (!BI->getDebugLoc().isUnknown()) {
1528 BI->setDebugLoc(DebugLoc());
1535 unsigned llvm::getDebugMetadataVersionFromModule(const Module &M) {
1536 if (auto *Val = mdconst::dyn_extract_or_null<ConstantInt>(
1537 M.getModuleFlag("Debug Info Version")))
1538 return Val->getZExtValue();
1542 llvm::DenseMap<const llvm::Function *, llvm::DISubprogram>
1543 llvm::makeSubprogramMap(const Module &M) {
1544 DenseMap<const Function *, DISubprogram> R;
1546 NamedMDNode *CU_Nodes = M.getNamedMetadata("llvm.dbg.cu");
1550 for (MDNode *N : CU_Nodes->operands()) {
1551 DICompileUnit CUNode(N);
1552 DIArray SPs = CUNode.getSubprograms();
1553 for (unsigned i = 0, e = SPs.getNumElements(); i != e; ++i) {
1554 DISubprogram SP(SPs.getElement(i));
1555 if (Function *F = SP.getFunction())
1556 R.insert(std::make_pair(F, SP));