1 //===--- DebugInfo.cpp - Debug Information Helper Classes -----------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the helper classes used to build and interpret debug
11 // information in LLVM IR form.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/Analysis/DebugInfo.h"
16 #include "llvm/Constants.h"
17 #include "llvm/DerivedTypes.h"
18 #include "llvm/Intrinsics.h"
19 #include "llvm/IntrinsicInst.h"
20 #include "llvm/Instructions.h"
21 #include "llvm/Module.h"
22 #include "llvm/Analysis/ValueTracking.h"
23 #include "llvm/Support/Streams.h"
26 //===----------------------------------------------------------------------===//
28 //===----------------------------------------------------------------------===//
30 DIDescriptor::DIDescriptor(GlobalVariable *gv, unsigned RequiredTag) {
33 // If this is non-null, check to see if the Tag matches. If not, set to null.
34 if (GV && getTag() != RequiredTag)
39 std::string DIDescriptor::getStringField(unsigned Elt) const {
40 if (GV == 0) return "";
41 Constant *C = GV->getInitializer();
42 if (C == 0 || Elt >= C->getNumOperands())
46 // Fills in the string if it succeeds
47 if (!GetConstantStringInfo(C->getOperand(Elt), Result))
52 uint64_t DIDescriptor::getUInt64Field(unsigned Elt) const {
53 if (GV == 0) return 0;
54 Constant *C = GV->getInitializer();
55 if (C == 0 || Elt >= C->getNumOperands())
57 if (ConstantInt *CI = dyn_cast<ConstantInt>(C->getOperand(Elt)))
58 return CI->getZExtValue();
63 DIDescriptor DIDescriptor::getDescriptorField(unsigned Elt) const {
64 if (GV == 0) return DIDescriptor();
65 Constant *C = GV->getInitializer();
66 if (C == 0 || Elt >= C->getNumOperands())
67 return DIDescriptor();
68 C = C->getOperand(Elt);
69 return DIDescriptor(dyn_cast<GlobalVariable>(C->stripPointerCasts()));
72 GlobalVariable *DIDescriptor::getGlobalVariableField(unsigned Elt) const {
73 if (GV == 0) return 0;
74 Constant *C = GV->getInitializer();
75 if (C == 0 || Elt >= C->getNumOperands())
77 C = C->getOperand(Elt);
79 return dyn_cast<GlobalVariable>(C->stripPointerCasts());
84 //===----------------------------------------------------------------------===//
85 // Simple Descriptor Constructors and other Methods
86 //===----------------------------------------------------------------------===//
88 DIAnchor::DIAnchor(GlobalVariable *GV)
89 : DIDescriptor(GV, dwarf::DW_TAG_anchor) {}
90 DIEnumerator::DIEnumerator(GlobalVariable *GV)
91 : DIDescriptor(GV, dwarf::DW_TAG_enumerator) {}
92 DISubrange::DISubrange(GlobalVariable *GV)
93 : DIDescriptor(GV, dwarf::DW_TAG_subrange_type) {}
94 DICompileUnit::DICompileUnit(GlobalVariable *GV)
95 : DIDescriptor(GV, dwarf::DW_TAG_compile_unit) {}
96 DIBasicType::DIBasicType(GlobalVariable *GV)
97 : DIType(GV, dwarf::DW_TAG_base_type) {}
98 DISubprogram::DISubprogram(GlobalVariable *GV)
99 : DIGlobal(GV, dwarf::DW_TAG_subprogram) {}
100 DIGlobalVariable::DIGlobalVariable(GlobalVariable *GV)
101 : DIGlobal(GV, dwarf::DW_TAG_variable) {}
102 DIBlock::DIBlock(GlobalVariable *GV)
103 : DIDescriptor(GV, dwarf::DW_TAG_lexical_block) {}
104 // needed by DIVariable::getType()
105 DIType::DIType(GlobalVariable *gv) : DIDescriptor(gv) {
107 unsigned tag = getTag();
108 if (tag != dwarf::DW_TAG_base_type && !DIDerivedType::isDerivedType(tag) &&
109 !DICompositeType::isCompositeType(tag))
113 /// isDerivedType - Return true if the specified tag is legal for
115 bool DIType::isDerivedType(unsigned Tag) {
117 case dwarf::DW_TAG_typedef:
118 case dwarf::DW_TAG_pointer_type:
119 case dwarf::DW_TAG_reference_type:
120 case dwarf::DW_TAG_const_type:
121 case dwarf::DW_TAG_volatile_type:
122 case dwarf::DW_TAG_restrict_type:
123 case dwarf::DW_TAG_member:
124 case dwarf::DW_TAG_inheritance:
127 // FIXME: Even though it doesn't make sense, CompositeTypes are current
128 // modelled as DerivedTypes, this should return true for them as well.
133 DIDerivedType::DIDerivedType(GlobalVariable *GV) : DIType(GV, true, true) {
134 if (GV && !isDerivedType(getTag()))
138 /// isCompositeType - Return true if the specified tag is legal for
140 bool DIType::isCompositeType(unsigned TAG) {
142 case dwarf::DW_TAG_array_type:
143 case dwarf::DW_TAG_structure_type:
144 case dwarf::DW_TAG_union_type:
145 case dwarf::DW_TAG_enumeration_type:
146 case dwarf::DW_TAG_vector_type:
147 case dwarf::DW_TAG_subroutine_type:
154 DICompositeType::DICompositeType(GlobalVariable *GV)
155 : DIDerivedType(GV, true, true) {
156 if (GV && !isCompositeType(getTag()))
160 /// isVariable - Return true if the specified tag is legal for DIVariable.
161 bool DIVariable::isVariable(unsigned Tag) {
163 case dwarf::DW_TAG_auto_variable:
164 case dwarf::DW_TAG_arg_variable:
165 case dwarf::DW_TAG_return_variable:
172 DIVariable::DIVariable(GlobalVariable *gv) : DIDescriptor(gv) {
173 if (gv && !isVariable(getTag()))
177 unsigned DIArray::getNumElements() const {
178 assert (GV && "Invalid DIArray");
179 Constant *C = GV->getInitializer();
180 assert (C && "Invalid DIArray initializer");
181 return C->getNumOperands();
184 /// Verify - Verify that a compile unit is well formed.
185 bool DICompileUnit::Verify() const {
188 if (getFilename().empty())
190 // It is possible that directory and produce string is empty.
194 /// Verify - Verify that a type descriptor is well formed.
195 bool DIType::Verify() const {
198 if (getContext().isNull())
201 DICompileUnit CU = getCompileUnit();
202 if (!CU.isNull() && !CU.Verify())
207 /// Verify - Verify that a composite type descriptor is well formed.
208 bool DICompositeType::Verify() const {
211 if (getContext().isNull())
214 DICompileUnit CU = getCompileUnit();
215 if (!CU.isNull() && !CU.Verify())
220 /// Verify - Verify that a subprogram descriptor is well formed.
221 bool DISubprogram::Verify() const {
225 if (getContext().isNull())
228 DICompileUnit CU = getCompileUnit();
232 DICompositeType Ty = getType();
233 if (!Ty.isNull() && !Ty.Verify())
238 /// Verify - Verify that a global variable descriptor is well formed.
239 bool DIGlobalVariable::Verify() const {
243 if (getContext().isNull())
246 DICompileUnit CU = getCompileUnit();
250 DIType Ty = getType();
260 /// Verify - Verify that a variable descriptor is well formed.
261 bool DIVariable::Verify() const {
265 if (getContext().isNull())
268 DIType Ty = getType();
276 /// getOriginalTypeSize - If this type is derived from a base type then
277 /// return base type size.
278 uint64_t DIDerivedType::getOriginalTypeSize() const {
279 if (getTag() != dwarf::DW_TAG_member)
280 return getSizeInBits();
281 DIType BT = getTypeDerivedFrom();
282 if (BT.getTag() != dwarf::DW_TAG_base_type)
283 return getSizeInBits();
284 return BT.getSizeInBits();
287 //===----------------------------------------------------------------------===//
288 // DIFactory: Basic Helpers
289 //===----------------------------------------------------------------------===//
291 DIFactory::DIFactory(Module &m) : M(m) {
292 StopPointFn = FuncStartFn = RegionStartFn = RegionEndFn = DeclareFn = 0;
293 EmptyStructPtr = PointerType::getUnqual(StructType::get(NULL, NULL));
296 /// getCastToEmpty - Return this descriptor as a Constant* with type '{}*'.
297 /// This is only valid when the descriptor is non-null.
298 Constant *DIFactory::getCastToEmpty(DIDescriptor D) {
299 if (D.isNull()) return Constant::getNullValue(EmptyStructPtr);
300 return ConstantExpr::getBitCast(D.getGV(), EmptyStructPtr);
303 Constant *DIFactory::GetTagConstant(unsigned TAG) {
304 assert((TAG & LLVMDebugVersionMask) == 0 &&
305 "Tag too large for debug encoding!");
306 return ConstantInt::get(Type::Int32Ty, TAG | LLVMDebugVersion);
309 Constant *DIFactory::GetStringConstant(const std::string &String) {
310 // Check string cache for previous edition.
311 Constant *&Slot = StringCache[String];
313 // Return Constant if previously defined.
314 if (Slot) return Slot;
316 const PointerType *DestTy = PointerType::getUnqual(Type::Int8Ty);
318 // If empty string then use a sbyte* null instead.
320 return Slot = ConstantPointerNull::get(DestTy);
322 // Construct string as an llvm constant.
323 Constant *ConstStr = ConstantArray::get(String);
325 // Otherwise create and return a new string global.
326 GlobalVariable *StrGV = new GlobalVariable(ConstStr->getType(), true,
327 GlobalVariable::InternalLinkage,
328 ConstStr, ".str", &M);
329 StrGV->setSection("llvm.metadata");
330 return Slot = ConstantExpr::getBitCast(StrGV, DestTy);
333 /// GetOrCreateAnchor - Look up an anchor for the specified tag and name. If it
334 /// already exists, return it. If not, create a new one and return it.
335 DIAnchor DIFactory::GetOrCreateAnchor(unsigned TAG, const char *Name) {
336 const Type *EltTy = StructType::get(Type::Int32Ty, Type::Int32Ty, NULL);
338 // Otherwise, create the global or return it if already in the module.
339 Constant *C = M.getOrInsertGlobal(Name, EltTy);
340 assert(isa<GlobalVariable>(C) && "Incorrectly typed anchor?");
341 GlobalVariable *GV = cast<GlobalVariable>(C);
343 // If it has an initializer, it is already in the module.
344 if (GV->hasInitializer())
345 return SubProgramAnchor = DIAnchor(GV);
347 GV->setLinkage(GlobalValue::LinkOnceLinkage);
348 GV->setSection("llvm.metadata");
349 GV->setConstant(true);
350 M.addTypeName("llvm.dbg.anchor.type", EltTy);
352 // Otherwise, set the initializer.
354 GetTagConstant(dwarf::DW_TAG_anchor),
355 ConstantInt::get(Type::Int32Ty, TAG)
358 GV->setInitializer(ConstantStruct::get(Elts, 2));
364 //===----------------------------------------------------------------------===//
365 // DIFactory: Primary Constructors
366 //===----------------------------------------------------------------------===//
368 /// GetOrCreateCompileUnitAnchor - Return the anchor for compile units,
369 /// creating a new one if there isn't already one in the module.
370 DIAnchor DIFactory::GetOrCreateCompileUnitAnchor() {
371 // If we already created one, just return it.
372 if (!CompileUnitAnchor.isNull())
373 return CompileUnitAnchor;
374 return CompileUnitAnchor = GetOrCreateAnchor(dwarf::DW_TAG_compile_unit,
375 "llvm.dbg.compile_units");
378 /// GetOrCreateSubprogramAnchor - Return the anchor for subprograms,
379 /// creating a new one if there isn't already one in the module.
380 DIAnchor DIFactory::GetOrCreateSubprogramAnchor() {
381 // If we already created one, just return it.
382 if (!SubProgramAnchor.isNull())
383 return SubProgramAnchor;
384 return SubProgramAnchor = GetOrCreateAnchor(dwarf::DW_TAG_subprogram,
385 "llvm.dbg.subprograms");
388 /// GetOrCreateGlobalVariableAnchor - Return the anchor for globals,
389 /// creating a new one if there isn't already one in the module.
390 DIAnchor DIFactory::GetOrCreateGlobalVariableAnchor() {
391 // If we already created one, just return it.
392 if (!GlobalVariableAnchor.isNull())
393 return GlobalVariableAnchor;
394 return GlobalVariableAnchor = GetOrCreateAnchor(dwarf::DW_TAG_variable,
395 "llvm.dbg.global_variables");
398 /// GetOrCreateArray - Create an descriptor for an array of descriptors.
399 /// This implicitly uniques the arrays created.
400 DIArray DIFactory::GetOrCreateArray(DIDescriptor *Tys, unsigned NumTys) {
401 SmallVector<Constant*, 16> Elts;
403 for (unsigned i = 0; i != NumTys; ++i)
404 Elts.push_back(getCastToEmpty(Tys[i]));
406 Constant *Init = ConstantArray::get(ArrayType::get(EmptyStructPtr,
408 &Elts[0], Elts.size());
409 // If we already have this array, just return the uniqued version.
410 DIDescriptor &Entry = SimpleConstantCache[Init];
411 if (!Entry.isNull()) return DIArray(Entry.getGV());
413 GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
414 GlobalValue::InternalLinkage,
415 Init, "llvm.dbg.array", &M);
416 GV->setSection("llvm.metadata");
417 Entry = DIDescriptor(GV);
421 /// GetOrCreateSubrange - Create a descriptor for a value range. This
422 /// implicitly uniques the values returned.
423 DISubrange DIFactory::GetOrCreateSubrange(int64_t Lo, int64_t Hi) {
425 GetTagConstant(dwarf::DW_TAG_subrange_type),
426 ConstantInt::get(Type::Int64Ty, Lo),
427 ConstantInt::get(Type::Int64Ty, Hi)
430 Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
432 // If we already have this range, just return the uniqued version.
433 DIDescriptor &Entry = SimpleConstantCache[Init];
434 if (!Entry.isNull()) return DISubrange(Entry.getGV());
436 M.addTypeName("llvm.dbg.subrange.type", Init->getType());
438 GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
439 GlobalValue::InternalLinkage,
440 Init, "llvm.dbg.subrange", &M);
441 GV->setSection("llvm.metadata");
442 Entry = DIDescriptor(GV);
443 return DISubrange(GV);
448 /// CreateCompileUnit - Create a new descriptor for the specified compile
449 /// unit. Note that this does not unique compile units within the module.
450 DICompileUnit DIFactory::CreateCompileUnit(unsigned LangID,
451 const std::string &Filename,
452 const std::string &Directory,
453 const std::string &Producer,
458 GetTagConstant(dwarf::DW_TAG_compile_unit),
459 getCastToEmpty(GetOrCreateCompileUnitAnchor()),
460 ConstantInt::get(Type::Int32Ty, LangID),
461 GetStringConstant(Filename),
462 GetStringConstant(Directory),
463 GetStringConstant(Producer),
464 ConstantInt::get(Type::Int1Ty, isMain),
465 ConstantInt::get(Type::Int1Ty, isOptimized),
466 GetStringConstant(Flags)
469 Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
471 M.addTypeName("llvm.dbg.compile_unit.type", Init->getType());
472 GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
473 GlobalValue::InternalLinkage,
474 Init, "llvm.dbg.compile_unit", &M);
475 GV->setSection("llvm.metadata");
476 return DICompileUnit(GV);
479 /// CreateEnumerator - Create a single enumerator value.
480 DIEnumerator DIFactory::CreateEnumerator(const std::string &Name, uint64_t Val){
482 GetTagConstant(dwarf::DW_TAG_enumerator),
483 GetStringConstant(Name),
484 ConstantInt::get(Type::Int64Ty, Val)
487 Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
489 M.addTypeName("llvm.dbg.enumerator.type", Init->getType());
490 GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
491 GlobalValue::InternalLinkage,
492 Init, "llvm.dbg.enumerator", &M);
493 GV->setSection("llvm.metadata");
494 return DIEnumerator(GV);
498 /// CreateBasicType - Create a basic type like int, float, etc.
499 DIBasicType DIFactory::CreateBasicType(DIDescriptor Context,
500 const std::string &Name,
501 DICompileUnit CompileUnit,
504 uint64_t AlignInBits,
505 uint64_t OffsetInBits, unsigned Flags,
508 GetTagConstant(dwarf::DW_TAG_base_type),
509 getCastToEmpty(Context),
510 GetStringConstant(Name),
511 getCastToEmpty(CompileUnit),
512 ConstantInt::get(Type::Int32Ty, LineNumber),
513 ConstantInt::get(Type::Int64Ty, SizeInBits),
514 ConstantInt::get(Type::Int64Ty, AlignInBits),
515 ConstantInt::get(Type::Int64Ty, OffsetInBits),
516 ConstantInt::get(Type::Int32Ty, Flags),
517 ConstantInt::get(Type::Int32Ty, Encoding)
520 Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
522 M.addTypeName("llvm.dbg.basictype.type", Init->getType());
523 GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
524 GlobalValue::InternalLinkage,
525 Init, "llvm.dbg.basictype", &M);
526 GV->setSection("llvm.metadata");
527 return DIBasicType(GV);
530 /// CreateDerivedType - Create a derived type like const qualified type,
531 /// pointer, typedef, etc.
532 DIDerivedType DIFactory::CreateDerivedType(unsigned Tag,
533 DIDescriptor Context,
534 const std::string &Name,
535 DICompileUnit CompileUnit,
538 uint64_t AlignInBits,
539 uint64_t OffsetInBits,
541 DIType DerivedFrom) {
544 getCastToEmpty(Context),
545 GetStringConstant(Name),
546 getCastToEmpty(CompileUnit),
547 ConstantInt::get(Type::Int32Ty, LineNumber),
548 ConstantInt::get(Type::Int64Ty, SizeInBits),
549 ConstantInt::get(Type::Int64Ty, AlignInBits),
550 ConstantInt::get(Type::Int64Ty, OffsetInBits),
551 ConstantInt::get(Type::Int32Ty, Flags),
552 getCastToEmpty(DerivedFrom)
555 Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
557 M.addTypeName("llvm.dbg.derivedtype.type", Init->getType());
558 GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
559 GlobalValue::InternalLinkage,
560 Init, "llvm.dbg.derivedtype", &M);
561 GV->setSection("llvm.metadata");
562 return DIDerivedType(GV);
565 /// CreateCompositeType - Create a composite type like array, struct, etc.
566 DICompositeType DIFactory::CreateCompositeType(unsigned Tag,
567 DIDescriptor Context,
568 const std::string &Name,
569 DICompileUnit CompileUnit,
572 uint64_t AlignInBits,
573 uint64_t OffsetInBits,
580 getCastToEmpty(Context),
581 GetStringConstant(Name),
582 getCastToEmpty(CompileUnit),
583 ConstantInt::get(Type::Int32Ty, LineNumber),
584 ConstantInt::get(Type::Int64Ty, SizeInBits),
585 ConstantInt::get(Type::Int64Ty, AlignInBits),
586 ConstantInt::get(Type::Int64Ty, OffsetInBits),
587 ConstantInt::get(Type::Int32Ty, Flags),
588 getCastToEmpty(DerivedFrom),
589 getCastToEmpty(Elements)
592 Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
594 M.addTypeName("llvm.dbg.composite.type", Init->getType());
595 GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
596 GlobalValue::InternalLinkage,
597 Init, "llvm.dbg.composite", &M);
598 GV->setSection("llvm.metadata");
599 return DICompositeType(GV);
603 /// CreateSubprogram - Create a new descriptor for the specified subprogram.
604 /// See comments in DISubprogram for descriptions of these fields. This
605 /// method does not unique the generated descriptors.
606 DISubprogram DIFactory::CreateSubprogram(DIDescriptor Context,
607 const std::string &Name,
608 const std::string &DisplayName,
609 const std::string &LinkageName,
610 DICompileUnit CompileUnit,
611 unsigned LineNo, DIType Type,
616 GetTagConstant(dwarf::DW_TAG_subprogram),
617 getCastToEmpty(GetOrCreateSubprogramAnchor()),
618 getCastToEmpty(Context),
619 GetStringConstant(Name),
620 GetStringConstant(DisplayName),
621 GetStringConstant(LinkageName),
622 getCastToEmpty(CompileUnit),
623 ConstantInt::get(Type::Int32Ty, LineNo),
624 getCastToEmpty(Type),
625 ConstantInt::get(Type::Int1Ty, isLocalToUnit),
626 ConstantInt::get(Type::Int1Ty, isDefinition)
629 Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
631 M.addTypeName("llvm.dbg.subprogram.type", Init->getType());
632 GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
633 GlobalValue::InternalLinkage,
634 Init, "llvm.dbg.subprogram", &M);
635 GV->setSection("llvm.metadata");
636 return DISubprogram(GV);
639 /// CreateGlobalVariable - Create a new descriptor for the specified global.
641 DIFactory::CreateGlobalVariable(DIDescriptor Context, const std::string &Name,
642 const std::string &DisplayName,
643 const std::string &LinkageName,
644 DICompileUnit CompileUnit,
645 unsigned LineNo, DIType Type,bool isLocalToUnit,
646 bool isDefinition, llvm::GlobalVariable *Val) {
648 GetTagConstant(dwarf::DW_TAG_variable),
649 getCastToEmpty(GetOrCreateGlobalVariableAnchor()),
650 getCastToEmpty(Context),
651 GetStringConstant(Name),
652 GetStringConstant(DisplayName),
653 GetStringConstant(LinkageName),
654 getCastToEmpty(CompileUnit),
655 ConstantInt::get(Type::Int32Ty, LineNo),
656 getCastToEmpty(Type),
657 ConstantInt::get(Type::Int1Ty, isLocalToUnit),
658 ConstantInt::get(Type::Int1Ty, isDefinition),
659 ConstantExpr::getBitCast(Val, EmptyStructPtr)
662 Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
664 M.addTypeName("llvm.dbg.global_variable.type", Init->getType());
665 GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
666 GlobalValue::InternalLinkage,
667 Init, "llvm.dbg.global_variable", &M);
668 GV->setSection("llvm.metadata");
669 return DIGlobalVariable(GV);
673 /// CreateVariable - Create a new descriptor for the specified variable.
674 DIVariable DIFactory::CreateVariable(unsigned Tag, DIDescriptor Context,
675 const std::string &Name,
676 DICompileUnit CompileUnit, unsigned LineNo,
680 getCastToEmpty(Context),
681 GetStringConstant(Name),
682 getCastToEmpty(CompileUnit),
683 ConstantInt::get(Type::Int32Ty, LineNo),
687 Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
689 M.addTypeName("llvm.dbg.variable.type", Init->getType());
690 GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
691 GlobalValue::InternalLinkage,
692 Init, "llvm.dbg.variable", &M);
693 GV->setSection("llvm.metadata");
694 return DIVariable(GV);
698 /// CreateBlock - This creates a descriptor for a lexical block with the
699 /// specified parent context.
700 DIBlock DIFactory::CreateBlock(DIDescriptor Context) {
702 GetTagConstant(dwarf::DW_TAG_lexical_block),
703 getCastToEmpty(Context)
706 Constant *Init = ConstantStruct::get(Elts, sizeof(Elts)/sizeof(Elts[0]));
708 M.addTypeName("llvm.dbg.block.type", Init->getType());
709 GlobalVariable *GV = new GlobalVariable(Init->getType(), true,
710 GlobalValue::InternalLinkage,
711 Init, "llvm.dbg.block", &M);
712 GV->setSection("llvm.metadata");
717 //===----------------------------------------------------------------------===//
718 // DIFactory: Routines for inserting code into a function
719 //===----------------------------------------------------------------------===//
721 /// InsertStopPoint - Create a new llvm.dbg.stoppoint intrinsic invocation,
722 /// inserting it at the end of the specified basic block.
723 void DIFactory::InsertStopPoint(DICompileUnit CU, unsigned LineNo,
724 unsigned ColNo, BasicBlock *BB) {
726 // Lazily construct llvm.dbg.stoppoint function.
728 StopPointFn = llvm::Intrinsic::getDeclaration(&M,
729 llvm::Intrinsic::dbg_stoppoint);
731 // Invoke llvm.dbg.stoppoint
733 llvm::ConstantInt::get(llvm::Type::Int32Ty, LineNo),
734 llvm::ConstantInt::get(llvm::Type::Int32Ty, ColNo),
737 CallInst::Create(StopPointFn, Args, Args+3, "", BB);
740 /// InsertSubprogramStart - Create a new llvm.dbg.func.start intrinsic to
741 /// mark the start of the specified subprogram.
742 void DIFactory::InsertSubprogramStart(DISubprogram SP, BasicBlock *BB) {
743 // Lazily construct llvm.dbg.func.start.
745 FuncStartFn = llvm::Intrinsic::getDeclaration(&M,
746 llvm::Intrinsic::dbg_func_start);
748 // Call llvm.dbg.func.start which also implicitly sets a stoppoint.
749 CallInst::Create(FuncStartFn, getCastToEmpty(SP), "", BB);
752 /// InsertRegionStart - Insert a new llvm.dbg.region.start intrinsic call to
753 /// mark the start of a region for the specified scoping descriptor.
754 void DIFactory::InsertRegionStart(DIDescriptor D, BasicBlock *BB) {
755 // Lazily construct llvm.dbg.region.start function.
757 RegionStartFn = llvm::Intrinsic::getDeclaration(&M,
758 llvm::Intrinsic::dbg_region_start);
759 // Call llvm.dbg.func.start.
760 CallInst::Create(RegionStartFn, getCastToEmpty(D), "", BB);
764 /// InsertRegionEnd - Insert a new llvm.dbg.region.end intrinsic call to
765 /// mark the end of a region for the specified scoping descriptor.
766 void DIFactory::InsertRegionEnd(DIDescriptor D, BasicBlock *BB) {
767 // Lazily construct llvm.dbg.region.end function.
769 RegionEndFn = llvm::Intrinsic::getDeclaration(&M,
770 llvm::Intrinsic::dbg_region_end);
772 CallInst::Create(RegionEndFn, getCastToEmpty(D), "", BB);
775 /// InsertDeclare - Insert a new llvm.dbg.declare intrinsic call.
776 void DIFactory::InsertDeclare(llvm::Value *Storage, DIVariable D,
778 // Cast the storage to a {}* for the call to llvm.dbg.declare.
779 Storage = new llvm::BitCastInst(Storage, EmptyStructPtr, "", BB);
782 DeclareFn = llvm::Intrinsic::getDeclaration(&M,
783 llvm::Intrinsic::dbg_declare);
784 Value *Args[] = { Storage, getCastToEmpty(D) };
785 CallInst::Create(DeclareFn, Args, Args+2, "", BB);
789 /// Finds the stoppoint coressponding to this instruction, that is the
790 /// stoppoint that dominates this instruction
791 const DbgStopPointInst *findStopPoint(const Instruction *Inst)
793 if (const DbgStopPointInst *DSI = dyn_cast<DbgStopPointInst>(Inst))
796 const BasicBlock *BB = Inst->getParent();
797 BasicBlock::const_iterator I = Inst, B;
800 // A BB consisting only of a terminator can't have a stoppoint.
804 if (const DbgStopPointInst *DSI = dyn_cast<DbgStopPointInst>(I))
808 // This BB didn't have a stoppoint: if there is only one
809 // predecessor, look for a stoppoint there.
810 // We could use getIDom(), but that would require dominator info.
811 BB = I->getParent()->getUniquePredecessor();
813 I = BB->getTerminator();
818 /// Finds the stoppoint corresponding to first real (non-debug intrinsic)
819 /// instruction in this Basic Block, and returns the stoppoint for it.
820 const DbgStopPointInst *findBBStopPoint(const BasicBlock *BB)
822 for(BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I != E; ++I) {
823 if (const DbgStopPointInst *DSI = dyn_cast<DbgStopPointInst>(I))
826 // Fallback to looking for stoppoint of unique predecessor.
827 // Useful if this BB contains no stoppoints, but unique predecessor does.
828 BB = BB->getUniquePredecessor();
830 return findStopPoint(BB->getTerminator());
834 /// Finds the dbg.declare intrinsic corresponding to this value if any.
835 /// It looks through pointer casts too.
836 const DbgDeclareInst *findDbgDeclare(const Value *V, bool stripCasts)
839 V = V->stripPointerCasts();
840 // Look for the bitcast.
841 for (Value::use_const_iterator I = V->use_begin(), E =V->use_end();
843 if (isa<BitCastInst>(I))
844 return findDbgDeclare(*I, false);
849 // Find dbg.declare among uses of the instruction.
850 for (Value::use_const_iterator I = V->use_begin(), E =V->use_end();
852 if (const DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(I))
859 /// dump - print compile unit.
860 void DICompileUnit::dump() const {
861 cerr << " [" << dwarf::LanguageString(getLanguage()) << "] ";
862 cerr << " [" << getDirectory() << "/" << getFilename() << " ]";
865 /// dump - print type.
866 void DIType::dump() const {
867 if (isNull()) return;
868 if (!getName().empty())
869 cerr << " [" << getName() << "] ";
870 unsigned Tag = getTag();
871 cerr << " [" << dwarf::TagString(Tag) << "] ";
872 // TODO : Print context
873 getCompileUnit().dump();
875 << getLineNumber() << ", "
876 << getSizeInBits() << ", "
877 << getAlignInBits() << ", "
881 cerr << " [private] ";
882 else if (isProtected())
883 cerr << " [protected] ";
887 if (isBasicType(Tag))
888 DIBasicType(GV).dump();
889 else if (isDerivedType(Tag))
890 DIDerivedType(GV).dump();
891 else if (isCompositeType(Tag))
892 DICompositeType(GV).dump();
894 cerr << "Invalid DIType\n";
900 /// dump - print basic type.
901 void DIBasicType::dump() const {
902 cerr << " [" << dwarf::AttributeEncodingString(getEncoding()) << "] ";
906 /// dump - print derived type.
907 void DIDerivedType::dump() const {
908 cerr << "\n\t Derived From: "; getTypeDerivedFrom().dump();
911 /// dump - print composite type.
912 void DICompositeType::dump() const {
913 DIArray A = getTypeArray();
916 cerr << " [" << A.getNumElements() << " elements]";
919 /// dump - print global.
920 void DIGlobal::dump() const {
922 if (!getName().empty())
923 cerr << " [" << getName() << "] ";
924 unsigned Tag = getTag();
925 cerr << " [" << dwarf::TagString(Tag) << "] ";
926 // TODO : Print context
927 getCompileUnit().dump();
928 cerr << " [" << getLineNumber() << "] ";
934 if (isGlobalVariable(Tag))
935 DIGlobalVariable(GV).dump();
940 /// dump - print subprogram.
941 void DISubprogram::dump() const {
945 /// dump - print global variable.
946 void DIGlobalVariable::dump() const {
947 cerr << " ["; getGlobal()->dump(); cerr << "] ";
950 /// dump - print variable.
951 void DIVariable::dump() const {
952 if (!getName().empty())
953 cerr << " [" << getName() << "] ";
954 getCompileUnit().dump();
955 cerr << " [" << getLineNumber() << "] ";