1 //===-- llvm/CodeGen/DwarfCompileUnit.cpp - Dwarf Compile Unit ------------===//
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 contains support for constructing a dwarf compile unit.
12 //===----------------------------------------------------------------------===//
14 #define DEBUG_TYPE "dwarfdebug"
16 #include "DwarfCompileUnit.h"
17 #include "DwarfAccelTable.h"
18 #include "DwarfDebug.h"
19 #include "llvm/ADT/APFloat.h"
20 #include "llvm/DIBuilder.h"
21 #include "llvm/IR/Constants.h"
22 #include "llvm/IR/DataLayout.h"
23 #include "llvm/IR/GlobalVariable.h"
24 #include "llvm/IR/Instructions.h"
25 #include "llvm/Target/Mangler.h"
26 #include "llvm/Target/TargetFrameLowering.h"
27 #include "llvm/Target/TargetMachine.h"
28 #include "llvm/Target/TargetLoweringObjectFile.h"
29 #include "llvm/Target/TargetRegisterInfo.h"
33 /// CompileUnit - Compile unit constructor.
34 CompileUnit::CompileUnit(unsigned UID, DIE *D, const MDNode *N, AsmPrinter *A,
35 DwarfDebug *DW, DwarfUnits *DWU)
36 : UniqueID(UID), Node(N), CUDie(D), Asm(A), DD(DW), DU(DWU), IndexTyDie(0) {
37 DIEIntegerOne = new (DIEValueAllocator) DIEInteger(1);
41 /// ~CompileUnit - Destructor for compile unit.
42 CompileUnit::~CompileUnit() {
43 for (unsigned j = 0, M = DIEBlocks.size(); j < M; ++j)
44 DIEBlocks[j]->~DIEBlock();
47 /// createDIEEntry - Creates a new DIEEntry to be a proxy for a debug
48 /// information entry.
49 DIEEntry *CompileUnit::createDIEEntry(DIE *Entry) {
50 DIEEntry *Value = new (DIEValueAllocator) DIEEntry(Entry);
54 /// getDefaultLowerBound - Return the default lower bound for an array. If the
55 /// DWARF version doesn't handle the language, return -1.
56 int64_t CompileUnit::getDefaultLowerBound() const {
57 switch (DICompileUnit(Node).getLanguage()) {
61 case dwarf::DW_LANG_C89:
62 case dwarf::DW_LANG_C99:
63 case dwarf::DW_LANG_C:
64 case dwarf::DW_LANG_C_plus_plus:
65 case dwarf::DW_LANG_ObjC:
66 case dwarf::DW_LANG_ObjC_plus_plus:
69 case dwarf::DW_LANG_Fortran77:
70 case dwarf::DW_LANG_Fortran90:
71 case dwarf::DW_LANG_Fortran95:
74 // The languages below have valid values only if the DWARF version >= 4.
75 case dwarf::DW_LANG_Java:
76 case dwarf::DW_LANG_Python:
77 case dwarf::DW_LANG_UPC:
78 case dwarf::DW_LANG_D:
79 if (dwarf::DWARF_VERSION >= 4)
83 case dwarf::DW_LANG_Ada83:
84 case dwarf::DW_LANG_Ada95:
85 case dwarf::DW_LANG_Cobol74:
86 case dwarf::DW_LANG_Cobol85:
87 case dwarf::DW_LANG_Modula2:
88 case dwarf::DW_LANG_Pascal83:
89 case dwarf::DW_LANG_PLI:
90 if (dwarf::DWARF_VERSION >= 4)
98 /// addFlag - Add a flag that is true.
99 void CompileUnit::addFlag(DIE *Die, uint16_t Attribute) {
100 if (DD->getDwarfVersion() >= 4)
101 Die->addValue(Attribute, dwarf::DW_FORM_flag_present, DIEIntegerOne);
103 Die->addValue(Attribute, dwarf::DW_FORM_flag, DIEIntegerOne);
106 /// addUInt - Add an unsigned integer attribute data and value.
108 void CompileUnit::addUInt(DIE *Die, uint16_t Attribute,
109 uint16_t Form, uint64_t Integer) {
110 if (!Form) Form = DIEInteger::BestForm(false, Integer);
111 DIEValue *Value = Integer == 1 ?
112 DIEIntegerOne : new (DIEValueAllocator) DIEInteger(Integer);
113 Die->addValue(Attribute, Form, Value);
116 /// addSInt - Add an signed integer attribute data and value.
118 void CompileUnit::addSInt(DIE *Die, uint16_t Attribute,
119 uint16_t Form, int64_t Integer) {
120 if (!Form) Form = DIEInteger::BestForm(true, Integer);
121 DIEValue *Value = new (DIEValueAllocator) DIEInteger(Integer);
122 Die->addValue(Attribute, Form, Value);
125 /// addString - Add a string attribute data and value. We always emit a
126 /// reference to the string pool instead of immediate strings so that DIEs have
127 /// more predictable sizes. In the case of split dwarf we emit an index
128 /// into another table which gets us the static offset into the string
130 void CompileUnit::addString(DIE *Die, uint16_t Attribute, StringRef String) {
133 if (!DD->useSplitDwarf()) {
134 MCSymbol *Symb = DU->getStringPoolEntry(String);
135 if (Asm->needsRelocationsForDwarfStringPool())
136 Value = new (DIEValueAllocator) DIELabel(Symb);
138 MCSymbol *StringPool = DU->getStringPoolSym();
139 Value = new (DIEValueAllocator) DIEDelta(Symb, StringPool);
141 Form = dwarf::DW_FORM_strp;
143 unsigned idx = DU->getStringPoolIndex(String);
144 Value = new (DIEValueAllocator) DIEInteger(idx);
145 Form = dwarf::DW_FORM_GNU_str_index;
147 DIEValue *Str = new (DIEValueAllocator) DIEString(Value, String);
148 Die->addValue(Attribute, Form, Str);
151 /// addLocalString - Add a string attribute data and value. This is guaranteed
152 /// to be in the local string pool instead of indirected.
153 void CompileUnit::addLocalString(DIE *Die, uint16_t Attribute,
155 MCSymbol *Symb = DU->getStringPoolEntry(String);
157 if (Asm->needsRelocationsForDwarfStringPool())
158 Value = new (DIEValueAllocator) DIELabel(Symb);
160 MCSymbol *StringPool = DU->getStringPoolSym();
161 Value = new (DIEValueAllocator) DIEDelta(Symb, StringPool);
163 Die->addValue(Attribute, dwarf::DW_FORM_strp, Value);
166 /// addExpr - Add a Dwarf expression attribute data and value.
168 void CompileUnit::addExpr(DIE *Die, uint16_t Attribute, uint16_t Form,
169 const MCExpr *Expr) {
170 DIEValue *Value = new (DIEValueAllocator) DIEExpr(Expr);
171 Die->addValue(Attribute, Form, Value);
174 /// addLabel - Add a Dwarf label attribute data and value.
176 void CompileUnit::addLabel(DIE *Die, uint16_t Attribute, uint16_t Form,
177 const MCSymbol *Label) {
178 DIEValue *Value = new (DIEValueAllocator) DIELabel(Label);
179 Die->addValue(Attribute, Form, Value);
182 /// addLabelAddress - Add a dwarf label attribute data and value using
183 /// DW_FORM_addr or DW_FORM_GNU_addr_index.
185 void CompileUnit::addLabelAddress(DIE *Die, uint16_t Attribute,
188 DD->addArangeLabel(SymbolCU(this, Label));
190 if (!DD->useSplitDwarf()) {
192 DIEValue *Value = new (DIEValueAllocator) DIELabel(Label);
193 Die->addValue(Attribute, dwarf::DW_FORM_addr, Value);
195 DIEValue *Value = new (DIEValueAllocator) DIEInteger(0);
196 Die->addValue(Attribute, dwarf::DW_FORM_addr, Value);
199 unsigned idx = DU->getAddrPoolIndex(Label);
200 DIEValue *Value = new (DIEValueAllocator) DIEInteger(idx);
201 Die->addValue(Attribute, dwarf::DW_FORM_GNU_addr_index, Value);
205 /// addOpAddress - Add a dwarf op address data and value using the
206 /// form given and an op of either DW_FORM_addr or DW_FORM_GNU_addr_index.
208 void CompileUnit::addOpAddress(DIE *Die, const MCSymbol *Sym) {
209 DD->addArangeLabel(SymbolCU(this, Sym));
210 if (!DD->useSplitDwarf()) {
211 addUInt(Die, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_addr);
212 addLabel(Die, 0, dwarf::DW_FORM_udata, Sym);
214 addUInt(Die, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_addr_index);
215 addUInt(Die, 0, dwarf::DW_FORM_GNU_addr_index, DU->getAddrPoolIndex(Sym));
219 /// addDelta - Add a label delta attribute data and value.
221 void CompileUnit::addDelta(DIE *Die, uint16_t Attribute, uint16_t Form,
222 const MCSymbol *Hi, const MCSymbol *Lo) {
223 DIEValue *Value = new (DIEValueAllocator) DIEDelta(Hi, Lo);
224 Die->addValue(Attribute, Form, Value);
227 /// addDIEEntry - Add a DIE attribute data and value.
229 void CompileUnit::addDIEEntry(DIE *Die, uint16_t Attribute, uint16_t Form,
231 Die->addValue(Attribute, Form, createDIEEntry(Entry));
234 /// addBlock - Add block data.
236 void CompileUnit::addBlock(DIE *Die, uint16_t Attribute, uint16_t Form,
238 Block->ComputeSize(Asm);
239 DIEBlocks.push_back(Block); // Memoize so we can call the destructor later on.
240 Die->addValue(Attribute, Block->BestForm(), Block);
243 /// addSourceLine - Add location information to specified debug information
245 void CompileUnit::addSourceLine(DIE *Die, DIVariable V) {
250 unsigned Line = V.getLineNumber();
253 unsigned FileID = DD->getOrCreateSourceID(V.getContext().getFilename(),
254 V.getContext().getDirectory(),
256 assert(FileID && "Invalid file id");
257 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
258 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
261 /// addSourceLine - Add location information to specified debug information
263 void CompileUnit::addSourceLine(DIE *Die, DIGlobalVariable G) {
264 // Verify global variable.
265 if (!G.isGlobalVariable())
268 unsigned Line = G.getLineNumber();
271 unsigned FileID = DD->getOrCreateSourceID(G.getFilename(), G.getDirectory(),
273 assert(FileID && "Invalid file id");
274 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
275 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
278 /// addSourceLine - Add location information to specified debug information
280 void CompileUnit::addSourceLine(DIE *Die, DISubprogram SP) {
281 // Verify subprogram.
282 if (!SP.isSubprogram())
285 // If the line number is 0, don't add it.
286 unsigned Line = SP.getLineNumber();
290 unsigned FileID = DD->getOrCreateSourceID(SP.getFilename(),
291 SP.getDirectory(), getUniqueID());
292 assert(FileID && "Invalid file id");
293 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
294 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
297 /// addSourceLine - Add location information to specified debug information
299 void CompileUnit::addSourceLine(DIE *Die, DIType Ty) {
304 unsigned Line = Ty.getLineNumber();
307 unsigned FileID = DD->getOrCreateSourceID(Ty.getFilename(),
308 Ty.getDirectory(), getUniqueID());
309 assert(FileID && "Invalid file id");
310 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
311 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
314 /// addSourceLine - Add location information to specified debug information
316 void CompileUnit::addSourceLine(DIE *Die, DIObjCProperty Ty) {
318 if (!Ty.isObjCProperty())
321 unsigned Line = Ty.getLineNumber();
324 DIFile File = Ty.getFile();
325 unsigned FileID = DD->getOrCreateSourceID(File.getFilename(),
326 File.getDirectory(), getUniqueID());
327 assert(FileID && "Invalid file id");
328 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
329 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
332 /// addSourceLine - Add location information to specified debug information
334 void CompileUnit::addSourceLine(DIE *Die, DINameSpace NS) {
339 unsigned Line = NS.getLineNumber();
342 StringRef FN = NS.getFilename();
344 unsigned FileID = DD->getOrCreateSourceID(FN, NS.getDirectory(),
346 assert(FileID && "Invalid file id");
347 addUInt(Die, dwarf::DW_AT_decl_file, 0, FileID);
348 addUInt(Die, dwarf::DW_AT_decl_line, 0, Line);
351 /// addVariableAddress - Add DW_AT_location attribute for a
352 /// DbgVariable based on provided MachineLocation.
353 void CompileUnit::addVariableAddress(const DbgVariable &DV, DIE *Die,
354 MachineLocation Location) {
355 if (DV.variableHasComplexAddress())
356 addComplexAddress(DV, Die, dwarf::DW_AT_location, Location);
357 else if (DV.isBlockByrefVariable())
358 addBlockByrefAddress(DV, Die, dwarf::DW_AT_location, Location);
360 addAddress(Die, dwarf::DW_AT_location, Location,
361 DV.getVariable().isIndirect());
364 /// addRegisterOp - Add register operand.
365 void CompileUnit::addRegisterOp(DIE *TheDie, unsigned Reg) {
366 const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
367 unsigned DWReg = RI->getDwarfRegNum(Reg, false);
369 addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_reg0 + DWReg);
371 addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_regx);
372 addUInt(TheDie, 0, dwarf::DW_FORM_udata, DWReg);
376 /// addRegisterOffset - Add register offset.
377 void CompileUnit::addRegisterOffset(DIE *TheDie, unsigned Reg,
379 const TargetRegisterInfo *RI = Asm->TM.getRegisterInfo();
380 unsigned DWReg = RI->getDwarfRegNum(Reg, false);
381 const TargetRegisterInfo *TRI = Asm->TM.getRegisterInfo();
382 if (Reg == TRI->getFrameRegister(*Asm->MF))
383 // If variable offset is based in frame register then use fbreg.
384 addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_fbreg);
386 addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_breg0 + DWReg);
388 addUInt(TheDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_bregx);
389 addUInt(TheDie, 0, dwarf::DW_FORM_udata, DWReg);
391 addSInt(TheDie, 0, dwarf::DW_FORM_sdata, Offset);
394 /// addAddress - Add an address attribute to a die based on the location
396 void CompileUnit::addAddress(DIE *Die, uint16_t Attribute,
397 const MachineLocation &Location, bool Indirect) {
398 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
400 if (Location.isReg() && !Indirect)
401 addRegisterOp(Block, Location.getReg());
403 addRegisterOffset(Block, Location.getReg(), Location.getOffset());
404 if (Indirect && !Location.isReg()) {
405 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
409 // Now attach the location information to the DIE.
410 addBlock(Die, Attribute, 0, Block);
413 /// addComplexAddress - Start with the address based on the location provided,
414 /// and generate the DWARF information necessary to find the actual variable
415 /// given the extra address information encoded in the DIVariable, starting from
416 /// the starting location. Add the DWARF information to the die.
418 void CompileUnit::addComplexAddress(const DbgVariable &DV, DIE *Die,
420 const MachineLocation &Location) {
421 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
422 unsigned N = DV.getNumAddrElements();
424 if (Location.isReg()) {
425 if (N >= 2 && DV.getAddrElement(0) == DIBuilder::OpPlus) {
426 // If first address element is OpPlus then emit
427 // DW_OP_breg + Offset instead of DW_OP_reg + Offset.
428 addRegisterOffset(Block, Location.getReg(), DV.getAddrElement(1));
431 addRegisterOp(Block, Location.getReg());
434 addRegisterOffset(Block, Location.getReg(), Location.getOffset());
437 uint64_t Element = DV.getAddrElement(i);
438 if (Element == DIBuilder::OpPlus) {
439 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
440 addUInt(Block, 0, dwarf::DW_FORM_udata, DV.getAddrElement(++i));
441 } else if (Element == DIBuilder::OpDeref) {
442 if (!Location.isReg())
443 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
444 } else llvm_unreachable("unknown DIBuilder Opcode");
447 // Now attach the location information to the DIE.
448 addBlock(Die, Attribute, 0, Block);
451 /* Byref variables, in Blocks, are declared by the programmer as "SomeType
452 VarName;", but the compiler creates a __Block_byref_x_VarName struct, and
453 gives the variable VarName either the struct, or a pointer to the struct, as
454 its type. This is necessary for various behind-the-scenes things the
455 compiler needs to do with by-reference variables in Blocks.
457 However, as far as the original *programmer* is concerned, the variable
458 should still have type 'SomeType', as originally declared.
460 The function getBlockByrefType dives into the __Block_byref_x_VarName
461 struct to find the original type of the variable, which is then assigned to
462 the variable's Debug Information Entry as its real type. So far, so good.
463 However now the debugger will expect the variable VarName to have the type
464 SomeType. So we need the location attribute for the variable to be an
465 expression that explains to the debugger how to navigate through the
466 pointers and struct to find the actual variable of type SomeType.
468 The following function does just that. We start by getting
469 the "normal" location for the variable. This will be the location
470 of either the struct __Block_byref_x_VarName or the pointer to the
471 struct __Block_byref_x_VarName.
473 The struct will look something like:
475 struct __Block_byref_x_VarName {
477 struct __Block_byref_x_VarName *forwarding;
478 ... <various other fields>
480 ... <maybe more fields>
483 If we are given the struct directly (as our starting point) we
484 need to tell the debugger to:
486 1). Add the offset of the forwarding field.
488 2). Follow that pointer to get the real __Block_byref_x_VarName
489 struct to use (the real one may have been copied onto the heap).
491 3). Add the offset for the field VarName, to find the actual variable.
493 If we started with a pointer to the struct, then we need to
494 dereference that pointer first, before the other steps.
495 Translating this into DWARF ops, we will need to append the following
496 to the current location description for the variable:
498 DW_OP_deref -- optional, if we start with a pointer
499 DW_OP_plus_uconst <forward_fld_offset>
501 DW_OP_plus_uconst <varName_fld_offset>
503 That is what this function does. */
505 /// addBlockByrefAddress - Start with the address based on the location
506 /// provided, and generate the DWARF information necessary to find the
507 /// actual Block variable (navigating the Block struct) based on the
508 /// starting location. Add the DWARF information to the die. For
509 /// more information, read large comment just above here.
511 void CompileUnit::addBlockByrefAddress(const DbgVariable &DV, DIE *Die,
513 const MachineLocation &Location) {
514 DIType Ty = DV.getType();
516 uint16_t Tag = Ty.getTag();
517 bool isPointer = false;
519 StringRef varName = DV.getName();
521 if (Tag == dwarf::DW_TAG_pointer_type) {
522 DIDerivedType DTy = DIDerivedType(Ty);
523 TmpTy = DTy.getTypeDerivedFrom();
527 DICompositeType blockStruct = DICompositeType(TmpTy);
529 // Find the __forwarding field and the variable field in the __Block_byref
531 DIArray Fields = blockStruct.getTypeArray();
532 DIDescriptor varField = DIDescriptor();
533 DIDescriptor forwardingField = DIDescriptor();
535 for (unsigned i = 0, N = Fields.getNumElements(); i < N; ++i) {
536 DIDescriptor Element = Fields.getElement(i);
537 DIDerivedType DT = DIDerivedType(Element);
538 StringRef fieldName = DT.getName();
539 if (fieldName == "__forwarding")
540 forwardingField = Element;
541 else if (fieldName == varName)
545 // Get the offsets for the forwarding field and the variable field.
546 unsigned forwardingFieldOffset =
547 DIDerivedType(forwardingField).getOffsetInBits() >> 3;
548 unsigned varFieldOffset =
549 DIDerivedType(varField).getOffsetInBits() >> 3;
551 // Decode the original location, and use that as the start of the byref
552 // variable's location.
553 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
555 if (Location.isReg())
556 addRegisterOp(Block, Location.getReg());
558 addRegisterOffset(Block, Location.getReg(), Location.getOffset());
560 // If we started with a pointer to the __Block_byref... struct, then
561 // the first thing we need to do is dereference the pointer (DW_OP_deref).
563 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
565 // Next add the offset for the '__forwarding' field:
566 // DW_OP_plus_uconst ForwardingFieldOffset. Note there's no point in
567 // adding the offset if it's 0.
568 if (forwardingFieldOffset > 0) {
569 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
570 addUInt(Block, 0, dwarf::DW_FORM_udata, forwardingFieldOffset);
573 // Now dereference the __forwarding field to get to the real __Block_byref
574 // struct: DW_OP_deref.
575 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
577 // Now that we've got the real __Block_byref... struct, add the offset
578 // for the variable's field to get to the location of the actual variable:
579 // DW_OP_plus_uconst varFieldOffset. Again, don't add if it's 0.
580 if (varFieldOffset > 0) {
581 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
582 addUInt(Block, 0, dwarf::DW_FORM_udata, varFieldOffset);
585 // Now attach the location information to the DIE.
586 addBlock(Die, Attribute, 0, Block);
589 /// isTypeSigned - Return true if the type is signed.
590 static bool isTypeSigned(DIType Ty, int *SizeInBits) {
591 if (Ty.isDerivedType())
592 return isTypeSigned(DIDerivedType(Ty).getTypeDerivedFrom(), SizeInBits);
593 if (Ty.isBasicType())
594 if (DIBasicType(Ty).getEncoding() == dwarf::DW_ATE_signed
595 || DIBasicType(Ty).getEncoding() == dwarf::DW_ATE_signed_char) {
596 *SizeInBits = Ty.getSizeInBits();
602 /// addConstantValue - Add constant value entry in variable DIE.
603 void CompileUnit::addConstantValue(DIE *Die, const MachineOperand &MO,
605 // FIXME: This is a bit conservative/simple - it emits negative values at
606 // their maximum bit width which is a bit unfortunate (& doesn't prefer
607 // udata/sdata over dataN as suggested by the DWARF spec)
608 assert(MO.isImm() && "Invalid machine operand!");
610 bool SignedConstant = isTypeSigned(Ty, &SizeInBits);
613 // If we're a signed constant definitely use sdata.
614 if (SignedConstant) {
615 addSInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, MO.getImm());
619 // Else use data for now unless it's larger than we can deal with.
620 switch (SizeInBits) {
622 Form = dwarf::DW_FORM_data1;
625 Form = dwarf::DW_FORM_data2;
628 Form = dwarf::DW_FORM_data4;
631 Form = dwarf::DW_FORM_data8;
634 Form = dwarf::DW_FORM_udata;
635 addUInt(Die, dwarf::DW_AT_const_value, Form, MO.getImm());
638 addUInt(Die, dwarf::DW_AT_const_value, Form, MO.getImm());
641 /// addConstantFPValue - Add constant value entry in variable DIE.
642 void CompileUnit::addConstantFPValue(DIE *Die, const MachineOperand &MO) {
643 assert (MO.isFPImm() && "Invalid machine operand!");
644 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
645 APFloat FPImm = MO.getFPImm()->getValueAPF();
647 // Get the raw data form of the floating point.
648 const APInt FltVal = FPImm.bitcastToAPInt();
649 const char *FltPtr = (const char*)FltVal.getRawData();
651 int NumBytes = FltVal.getBitWidth() / 8; // 8 bits per byte.
652 bool LittleEndian = Asm->getDataLayout().isLittleEndian();
653 int Incr = (LittleEndian ? 1 : -1);
654 int Start = (LittleEndian ? 0 : NumBytes - 1);
655 int Stop = (LittleEndian ? NumBytes : -1);
657 // Output the constant to DWARF one byte at a time.
658 for (; Start != Stop; Start += Incr)
659 addUInt(Block, 0, dwarf::DW_FORM_data1,
660 (unsigned char)0xFF & FltPtr[Start]);
662 addBlock(Die, dwarf::DW_AT_const_value, 0, Block);
665 /// addConstantFPValue - Add constant value entry in variable DIE.
666 void CompileUnit::addConstantFPValue(DIE *Die, const ConstantFP *CFP) {
667 // Pass this down to addConstantValue as an unsigned bag of bits.
668 addConstantValue(Die, CFP->getValueAPF().bitcastToAPInt(), true);
671 /// addConstantValue - Add constant value entry in variable DIE.
672 void CompileUnit::addConstantValue(DIE *Die, const ConstantInt *CI,
674 addConstantValue(Die, CI->getValue(), Unsigned);
677 // addConstantValue - Add constant value entry in variable DIE.
678 void CompileUnit::addConstantValue(DIE *Die, const APInt &Val, bool Unsigned) {
679 unsigned CIBitWidth = Val.getBitWidth();
680 if (CIBitWidth <= 64) {
681 // If we're a signed constant definitely use sdata.
683 addSInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata,
688 // Else use data for now unless it's larger than we can deal with.
690 switch (CIBitWidth) {
692 Form = dwarf::DW_FORM_data1;
695 Form = dwarf::DW_FORM_data2;
698 Form = dwarf::DW_FORM_data4;
701 Form = dwarf::DW_FORM_data8;
704 addUInt(Die, dwarf::DW_AT_const_value, dwarf::DW_FORM_udata,
708 addUInt(Die, dwarf::DW_AT_const_value, Form, Val.getZExtValue());
712 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
714 // Get the raw data form of the large APInt.
715 const uint64_t *Ptr64 = Val.getRawData();
717 int NumBytes = Val.getBitWidth() / 8; // 8 bits per byte.
718 bool LittleEndian = Asm->getDataLayout().isLittleEndian();
720 // Output the constant to DWARF one byte at a time.
721 for (int i = 0; i < NumBytes; i++) {
724 c = Ptr64[i / 8] >> (8 * (i & 7));
726 c = Ptr64[(NumBytes - 1 - i) / 8] >> (8 * ((NumBytes - 1 - i) & 7));
727 addUInt(Block, 0, dwarf::DW_FORM_data1, c);
730 addBlock(Die, dwarf::DW_AT_const_value, 0, Block);
733 /// addTemplateParams - Add template parameters into buffer.
734 void CompileUnit::addTemplateParams(DIE &Buffer, DIArray TParams) {
735 // Add template parameters.
736 for (unsigned i = 0, e = TParams.getNumElements(); i != e; ++i) {
737 DIDescriptor Element = TParams.getElement(i);
738 if (Element.isTemplateTypeParameter())
739 Buffer.addChild(getOrCreateTemplateTypeParameterDIE(
740 DITemplateTypeParameter(Element)));
741 else if (Element.isTemplateValueParameter())
742 Buffer.addChild(getOrCreateTemplateValueParameterDIE(
743 DITemplateValueParameter(Element)));
747 /// getOrCreateContextDIE - Get context owner's DIE.
748 DIE *CompileUnit::getOrCreateContextDIE(DIDescriptor Context) {
749 if (Context.isType())
750 return getOrCreateTypeDIE(DIType(Context));
751 else if (Context.isNameSpace())
752 return getOrCreateNameSpace(DINameSpace(Context));
753 else if (Context.isSubprogram())
754 return getOrCreateSubprogramDIE(DISubprogram(Context));
756 return getDIE(Context);
759 /// addToContextOwner - Add Die into the list of its context owner's children.
760 void CompileUnit::addToContextOwner(DIE *Die, DIDescriptor Context) {
761 assert(!Die->getParent());
762 if (DIE *ContextDIE = getOrCreateContextDIE(Context)) {
763 if (Die->getParent()) {
764 // While creating the context, if this is a type member, we will have
765 // added the child to the context already.
766 assert(Die->getParent() == ContextDIE);
769 ContextDIE->addChild(Die);
774 /// getOrCreateTypeDIE - Find existing DIE or create new DIE for the
776 DIE *CompileUnit::getOrCreateTypeDIE(const MDNode *TyNode) {
780 DIE *TyDIE = getDIE(Ty);
785 TyDIE = new DIE(Ty.getTag());
786 insertDIE(Ty, TyDIE);
787 if (Ty.isBasicType())
788 constructTypeDIE(*TyDIE, DIBasicType(Ty));
789 else if (Ty.isCompositeType())
790 constructTypeDIE(*TyDIE, DICompositeType(Ty));
792 assert(Ty.isDerivedType() && "Unknown kind of DIType");
793 constructTypeDIE(*TyDIE, DIDerivedType(Ty));
795 // If this is a named finished type then include it in the list of types
796 // for the accelerator tables.
797 if (!Ty.getName().empty() && !Ty.isForwardDecl()) {
798 bool IsImplementation = 0;
799 if (Ty.isCompositeType()) {
800 DICompositeType CT(Ty);
801 // A runtime language of 0 actually means C/C++ and that any
802 // non-negative value is some version of Objective-C/C++.
803 IsImplementation = (CT.getRunTimeLang() == 0) ||
804 CT.isObjcClassComplete();
806 unsigned Flags = IsImplementation ? dwarf::DW_FLAG_type_implementation : 0;
807 addAccelType(Ty.getName(), std::make_pair(TyDIE, Flags));
810 addToContextOwner(TyDIE, DD->resolve(Ty.getContext()));
814 /// addType - Add a new type attribute to the specified entity.
815 void CompileUnit::addType(DIE *Entity, DIType Ty, uint16_t Attribute) {
816 assert(Ty && "Trying to add a type that doesn't exist?");
818 // Check for pre-existence.
819 DIEEntry *Entry = getDIEEntry(Ty);
820 // If it exists then use the existing value.
822 Entity->addValue(Attribute, dwarf::DW_FORM_ref4, Entry);
827 DIE *Buffer = getOrCreateTypeDIE(Ty);
830 Entry = createDIEEntry(Buffer);
831 insertDIEEntry(Ty, Entry);
832 Entity->addValue(Attribute, dwarf::DW_FORM_ref4, Entry);
834 // If this is a complete composite type then include it in the
835 // list of global types.
839 // Accelerator table mutators - add each name along with its companion
840 // DIE to the proper table while ensuring that the name that we're going
841 // to reference is in the string table. We do this since the names we
842 // add may not only be identical to the names in the DIE.
843 void CompileUnit::addAccelName(StringRef Name, DIE *Die) {
844 DU->getStringPoolEntry(Name);
845 std::vector<DIE *> &DIEs = AccelNames[Name];
849 void CompileUnit::addAccelObjC(StringRef Name, DIE *Die) {
850 DU->getStringPoolEntry(Name);
851 std::vector<DIE *> &DIEs = AccelObjC[Name];
855 void CompileUnit::addAccelNamespace(StringRef Name, DIE *Die) {
856 DU->getStringPoolEntry(Name);
857 std::vector<DIE *> &DIEs = AccelNamespace[Name];
861 void CompileUnit::addAccelType(StringRef Name, std::pair<DIE *, unsigned> Die) {
862 DU->getStringPoolEntry(Name);
863 std::vector<std::pair<DIE *, unsigned> > &DIEs = AccelTypes[Name];
867 /// addGlobalName - Add a new global name to the compile unit.
868 void CompileUnit::addGlobalName(StringRef Name, DIE *Die) {
869 GlobalNames[Name] = Die;
872 /// addGlobalType - Add a new global type to the compile unit.
874 void CompileUnit::addGlobalType(DIType Ty) {
875 DIDescriptor Context = DD->resolve(Ty.getContext());
876 if (!Ty.getName().empty() && !Ty.isForwardDecl() &&
877 (!Context || Context.isCompileUnit() || Context.isFile() ||
878 Context.isNameSpace()))
879 if (DIEEntry *Entry = getDIEEntry(Ty))
880 GlobalTypes[Ty.getName()] = Entry->getEntry();
883 /// addPubTypes - Add type for pubtypes section.
884 void CompileUnit::addPubTypes(DISubprogram SP) {
885 DICompositeType SPTy = SP.getType();
886 uint16_t SPTag = SPTy.getTag();
887 if (SPTag != dwarf::DW_TAG_subroutine_type)
890 DIArray Args = SPTy.getTypeArray();
891 for (unsigned i = 0, e = Args.getNumElements(); i != e; ++i) {
892 DIType ATy(Args.getElement(i));
899 /// constructTypeDIE - Construct basic type die from DIBasicType.
900 void CompileUnit::constructTypeDIE(DIE &Buffer, DIBasicType BTy) {
901 // Get core information.
902 StringRef Name = BTy.getName();
903 // Add name if not anonymous or intermediate type.
905 addString(&Buffer, dwarf::DW_AT_name, Name);
907 // An unspecified type only has a name attribute.
908 if (BTy.getTag() == dwarf::DW_TAG_unspecified_type)
911 addUInt(&Buffer, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
914 uint64_t Size = BTy.getSizeInBits() >> 3;
915 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
918 /// constructTypeDIE - Construct derived type die from DIDerivedType.
919 void CompileUnit::constructTypeDIE(DIE &Buffer, DIDerivedType DTy) {
920 // Get core information.
921 StringRef Name = DTy.getName();
922 uint64_t Size = DTy.getSizeInBits() >> 3;
923 uint16_t Tag = Buffer.getTag();
925 // Map to main type, void will not have a type.
926 DIType FromTy = DTy.getTypeDerivedFrom();
928 addType(&Buffer, FromTy);
930 // Add name if not anonymous or intermediate type.
932 addString(&Buffer, dwarf::DW_AT_name, Name);
934 // Add size if non-zero (derived types might be zero-sized.)
935 if (Size && Tag != dwarf::DW_TAG_pointer_type)
936 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
938 if (Tag == dwarf::DW_TAG_ptr_to_member_type)
939 addDIEEntry(&Buffer, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
940 getOrCreateTypeDIE(DD->resolve(DTy.getClassType())));
941 // Add source line info if available and TyDesc is not a forward declaration.
942 if (!DTy.isForwardDecl())
943 addSourceLine(&Buffer, DTy);
946 /// Return true if the type is appropriately scoped to be contained inside
947 /// its own type unit.
948 static bool isTypeUnitScoped(DIType Ty, const DwarfDebug *DD) {
949 DIScope Parent = DD->resolve(Ty.getContext());
951 // Don't generate a hash for anything scoped inside a function.
952 if (Parent.isSubprogram())
954 Parent = DD->resolve(Parent.getContext());
959 /// Return true if the type should be split out into a type unit.
960 static bool shouldCreateTypeUnit(DICompositeType CTy, const DwarfDebug *DD) {
961 uint16_t Tag = CTy.getTag();
964 case dwarf::DW_TAG_structure_type:
965 case dwarf::DW_TAG_union_type:
966 case dwarf::DW_TAG_enumeration_type:
967 case dwarf::DW_TAG_class_type:
968 // If this is a class, structure, union, or enumeration type
969 // that is not a declaration, is a type definition, and not scoped
970 // inside a function then separate this out as a type unit.
971 if (CTy.isForwardDecl() || !isTypeUnitScoped(CTy, DD))
979 /// constructTypeDIE - Construct type DIE from DICompositeType.
980 void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
981 // Get core information.
982 StringRef Name = CTy.getName();
984 uint64_t Size = CTy.getSizeInBits() >> 3;
985 uint16_t Tag = Buffer.getTag();
988 case dwarf::DW_TAG_array_type:
989 constructArrayTypeDIE(Buffer, &CTy);
991 case dwarf::DW_TAG_enumeration_type: {
992 DIArray Elements = CTy.getTypeArray();
994 // Add enumerators to enumeration type.
995 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
997 DIDescriptor Enum(Elements.getElement(i));
998 if (Enum.isEnumerator()) {
999 ElemDie = constructEnumTypeDIE(DIEnumerator(Enum));
1000 Buffer.addChild(ElemDie);
1003 DIType DTy = CTy.getTypeDerivedFrom();
1005 addType(&Buffer, DTy);
1006 addFlag(&Buffer, dwarf::DW_AT_enum_class);
1010 case dwarf::DW_TAG_subroutine_type: {
1011 // Add return type. A void return won't have a type.
1012 DIArray Elements = CTy.getTypeArray();
1013 DIDescriptor RTy = Elements.getElement(0);
1015 addType(&Buffer, DIType(RTy));
1017 bool isPrototyped = true;
1019 for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
1020 DIDescriptor Ty = Elements.getElement(i);
1021 if (Ty.isUnspecifiedParameter()) {
1022 DIE *Arg = new DIE(dwarf::DW_TAG_unspecified_parameters);
1023 Buffer.addChild(Arg);
1024 isPrototyped = false;
1026 DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
1027 addType(Arg, DIType(Ty));
1028 if (DIType(Ty).isArtificial())
1029 addFlag(Arg, dwarf::DW_AT_artificial);
1030 Buffer.addChild(Arg);
1033 // Add prototype flag if we're dealing with a C language and the
1034 // function has been prototyped.
1035 uint16_t Language = DICompileUnit(Node).getLanguage();
1037 (Language == dwarf::DW_LANG_C89 ||
1038 Language == dwarf::DW_LANG_C99 ||
1039 Language == dwarf::DW_LANG_ObjC))
1040 addFlag(&Buffer, dwarf::DW_AT_prototyped);
1043 case dwarf::DW_TAG_structure_type:
1044 case dwarf::DW_TAG_union_type:
1045 case dwarf::DW_TAG_class_type: {
1046 // Add elements to structure type.
1047 DIArray Elements = CTy.getTypeArray();
1048 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1049 DIDescriptor Element = Elements.getElement(i);
1050 DIE *ElemDie = NULL;
1051 if (Element.isSubprogram()) {
1052 DISubprogram SP(Element);
1053 ElemDie = getOrCreateSubprogramDIE(DISubprogram(Element));
1054 if (SP.isProtected())
1055 addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1056 dwarf::DW_ACCESS_protected);
1057 else if (SP.isPrivate())
1058 addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1059 dwarf::DW_ACCESS_private);
1061 addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1062 dwarf::DW_ACCESS_public);
1063 if (SP.isExplicit())
1064 addFlag(ElemDie, dwarf::DW_AT_explicit);
1065 } else if (Element.isDerivedType()) {
1066 DIDerivedType DDTy(Element);
1067 if (DDTy.getTag() == dwarf::DW_TAG_friend) {
1068 ElemDie = new DIE(dwarf::DW_TAG_friend);
1069 addType(ElemDie, DDTy.getTypeDerivedFrom(), dwarf::DW_AT_friend);
1070 } else if (DDTy.isStaticMember())
1071 ElemDie = createStaticMemberDIE(DDTy);
1073 ElemDie = createMemberDIE(DDTy);
1074 Buffer.addChild(ElemDie);
1075 } else if (Element.isObjCProperty()) {
1076 DIObjCProperty Property(Element);
1077 ElemDie = new DIE(Property.getTag());
1078 StringRef PropertyName = Property.getObjCPropertyName();
1079 addString(ElemDie, dwarf::DW_AT_APPLE_property_name, PropertyName);
1080 addType(ElemDie, Property.getType());
1081 addSourceLine(ElemDie, Property);
1082 StringRef GetterName = Property.getObjCPropertyGetterName();
1083 if (!GetterName.empty())
1084 addString(ElemDie, dwarf::DW_AT_APPLE_property_getter, GetterName);
1085 StringRef SetterName = Property.getObjCPropertySetterName();
1086 if (!SetterName.empty())
1087 addString(ElemDie, dwarf::DW_AT_APPLE_property_setter, SetterName);
1088 unsigned PropertyAttributes = 0;
1089 if (Property.isReadOnlyObjCProperty())
1090 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readonly;
1091 if (Property.isReadWriteObjCProperty())
1092 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readwrite;
1093 if (Property.isAssignObjCProperty())
1094 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_assign;
1095 if (Property.isRetainObjCProperty())
1096 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_retain;
1097 if (Property.isCopyObjCProperty())
1098 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_copy;
1099 if (Property.isNonAtomicObjCProperty())
1100 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_nonatomic;
1101 if (PropertyAttributes)
1102 addUInt(ElemDie, dwarf::DW_AT_APPLE_property_attribute, 0,
1103 PropertyAttributes);
1105 DIEEntry *Entry = getDIEEntry(Element);
1107 Entry = createDIEEntry(ElemDie);
1108 insertDIEEntry(Element, Entry);
1110 Buffer.addChild(ElemDie);
1115 if (CTy.isAppleBlockExtension())
1116 addFlag(&Buffer, dwarf::DW_AT_APPLE_block);
1118 DICompositeType ContainingType(DD->resolve(CTy.getContainingType()));
1119 if (DIDescriptor(ContainingType).isCompositeType())
1120 addDIEEntry(&Buffer, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
1121 getOrCreateTypeDIE(DIType(ContainingType)));
1123 if (CTy.isObjcClassComplete())
1124 addFlag(&Buffer, dwarf::DW_AT_APPLE_objc_complete_type);
1126 // Add template parameters to a class, structure or union types.
1127 // FIXME: The support isn't in the metadata for this yet.
1128 if (Tag == dwarf::DW_TAG_class_type ||
1129 Tag == dwarf::DW_TAG_structure_type ||
1130 Tag == dwarf::DW_TAG_union_type)
1131 addTemplateParams(Buffer, CTy.getTemplateParams());
1139 // Add name if not anonymous or intermediate type.
1141 addString(&Buffer, dwarf::DW_AT_name, Name);
1143 if (Tag == dwarf::DW_TAG_enumeration_type ||
1144 Tag == dwarf::DW_TAG_class_type ||
1145 Tag == dwarf::DW_TAG_structure_type ||
1146 Tag == dwarf::DW_TAG_union_type) {
1147 // Add size if non-zero (derived types might be zero-sized.)
1148 // TODO: Do we care about size for enum forward declarations?
1150 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
1151 else if (!CTy.isForwardDecl())
1152 // Add zero size if it is not a forward declaration.
1153 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, 0);
1155 // If we're a forward decl, say so.
1156 if (CTy.isForwardDecl())
1157 addFlag(&Buffer, dwarf::DW_AT_declaration);
1159 // Add source line info if available.
1160 if (!CTy.isForwardDecl())
1161 addSourceLine(&Buffer, CTy);
1163 // No harm in adding the runtime language to the declaration.
1164 unsigned RLang = CTy.getRunTimeLang();
1166 addUInt(&Buffer, dwarf::DW_AT_APPLE_runtime_class,
1167 dwarf::DW_FORM_data1, RLang);
1169 // If this is a type applicable to a type unit it then add it to the
1170 // list of types we'll compute a hash for later.
1171 if (shouldCreateTypeUnit(CTy, DD))
1172 DD->addTypeUnitType(&Buffer);
1175 /// getOrCreateTemplateTypeParameterDIE - Find existing DIE or create new DIE
1176 /// for the given DITemplateTypeParameter.
1178 CompileUnit::getOrCreateTemplateTypeParameterDIE(DITemplateTypeParameter TP) {
1179 DIE *ParamDIE = getDIE(TP);
1183 ParamDIE = new DIE(dwarf::DW_TAG_template_type_parameter);
1184 // Add the type if it exists, it could be void and therefore no type.
1186 addType(ParamDIE, TP.getType());
1187 if (!TP.getName().empty())
1188 addString(ParamDIE, dwarf::DW_AT_name, TP.getName());
1192 /// getOrCreateTemplateValueParameterDIE - Find existing DIE or create new DIE
1193 /// for the given DITemplateValueParameter.
1195 CompileUnit::getOrCreateTemplateValueParameterDIE(DITemplateValueParameter VP) {
1196 DIE *ParamDIE = getDIE(VP);
1200 ParamDIE = new DIE(VP.getTag());
1202 // Add the type if there is one, template template and template parameter
1203 // packs will not have a type.
1205 addType(ParamDIE, VP.getType());
1206 if (!VP.getName().empty())
1207 addString(ParamDIE, dwarf::DW_AT_name, VP.getName());
1208 if (Value *Val = VP.getValue()) {
1209 if (ConstantInt *CI = dyn_cast<ConstantInt>(Val))
1210 addConstantValue(ParamDIE, CI, VP.getType().isUnsignedDIType());
1211 else if (GlobalValue *GV = dyn_cast<GlobalValue>(Val)) {
1212 // For declaration non-type template parameters (such as global values and
1214 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
1215 addOpAddress(Block, Asm->Mang->getSymbol(GV));
1216 // Emit DW_OP_stack_value to use the address as the immediate value of the
1217 // parameter, rather than a pointer to it.
1218 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_stack_value);
1219 addBlock(ParamDIE, dwarf::DW_AT_location, 0, Block);
1220 } else if (VP.getTag() == dwarf::DW_TAG_GNU_template_template_param) {
1221 assert(isa<MDString>(Val));
1222 addString(ParamDIE, dwarf::DW_AT_GNU_template_name,
1223 cast<MDString>(Val)->getString());
1224 } else if (VP.getTag() == dwarf::DW_TAG_GNU_template_parameter_pack) {
1225 assert(isa<MDNode>(Val));
1226 DIArray A(cast<MDNode>(Val));
1227 addTemplateParams(*ParamDIE, A);
1234 /// getOrCreateNameSpace - Create a DIE for DINameSpace.
1235 DIE *CompileUnit::getOrCreateNameSpace(DINameSpace NS) {
1236 DIE *NDie = getDIE(NS);
1239 NDie = new DIE(dwarf::DW_TAG_namespace);
1240 insertDIE(NS, NDie);
1241 if (!NS.getName().empty()) {
1242 addString(NDie, dwarf::DW_AT_name, NS.getName());
1243 addAccelNamespace(NS.getName(), NDie);
1244 addGlobalName(NS.getName(), NDie);
1246 addAccelNamespace("(anonymous namespace)", NDie);
1247 addSourceLine(NDie, NS);
1248 addToContextOwner(NDie, NS.getContext());
1252 /// getOrCreateSubprogramDIE - Create new DIE using SP.
1253 DIE *CompileUnit::getOrCreateSubprogramDIE(DISubprogram SP) {
1254 // Construct the context before querying for the existence of the DIE in case
1255 // such construction creates the DIE (as is the case for member function
1257 DIE *ContextDIE = getOrCreateContextDIE(SP.getContext());
1259 ContextDIE = CUDie.get();
1261 DIE *SPDie = getDIE(SP);
1265 SPDie = new DIE(dwarf::DW_TAG_subprogram);
1267 // DW_TAG_inlined_subroutine may refer to this DIE.
1268 insertDIE(SP, SPDie);
1270 DISubprogram SPDecl = SP.getFunctionDeclaration();
1271 DIE *DeclDie = NULL;
1272 if (SPDecl.isSubprogram()) {
1273 DeclDie = getOrCreateSubprogramDIE(SPDecl);
1276 // Add to context owner.
1277 ContextDIE->addChild(SPDie);
1279 // Add function template parameters.
1280 addTemplateParams(*SPDie, SP.getTemplateParams());
1282 // If this DIE is going to refer declaration info using AT_specification
1283 // then there is no need to add other attributes.
1285 // Refer function declaration directly.
1286 addDIEEntry(SPDie, dwarf::DW_AT_specification, dwarf::DW_FORM_ref4,
1292 // Add the linkage name if we have one.
1293 StringRef LinkageName = SP.getLinkageName();
1294 if (!LinkageName.empty())
1295 addString(SPDie, dwarf::DW_AT_MIPS_linkage_name,
1296 GlobalValue::getRealLinkageName(LinkageName));
1298 // Constructors and operators for anonymous aggregates do not have names.
1299 if (!SP.getName().empty())
1300 addString(SPDie, dwarf::DW_AT_name, SP.getName());
1302 addSourceLine(SPDie, SP);
1304 // Add the prototype if we have a prototype and we have a C like
1306 uint16_t Language = DICompileUnit(Node).getLanguage();
1307 if (SP.isPrototyped() &&
1308 (Language == dwarf::DW_LANG_C89 ||
1309 Language == dwarf::DW_LANG_C99 ||
1310 Language == dwarf::DW_LANG_ObjC))
1311 addFlag(SPDie, dwarf::DW_AT_prototyped);
1313 // Add Return Type. A void return type will not have a type.
1314 DICompositeType SPTy = SP.getType();
1315 assert(SPTy.getTag() == dwarf::DW_TAG_subroutine_type &&
1316 "the type of a subprogram should be a subroutine");
1318 DIArray Args = SPTy.getTypeArray();
1319 if (Args.getElement(0))
1320 addType(SPDie, DIType(Args.getElement(0)));
1322 unsigned VK = SP.getVirtuality();
1324 addUInt(SPDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_data1, VK);
1325 DIEBlock *Block = getDIEBlock();
1326 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1327 addUInt(Block, 0, dwarf::DW_FORM_udata, SP.getVirtualIndex());
1328 addBlock(SPDie, dwarf::DW_AT_vtable_elem_location, 0, Block);
1329 ContainingTypeMap.insert(std::make_pair(SPDie,
1330 DD->resolve(SP.getContainingType())));
1333 if (!SP.isDefinition()) {
1334 addFlag(SPDie, dwarf::DW_AT_declaration);
1336 // Add arguments. Do not add arguments for subprogram definition. They will
1337 // be handled while processing variables.
1338 for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
1339 DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
1340 DIType ATy = DIType(Args.getElement(i));
1342 if (ATy.isArtificial())
1343 addFlag(Arg, dwarf::DW_AT_artificial);
1344 SPDie->addChild(Arg);
1348 if (SP.isArtificial())
1349 addFlag(SPDie, dwarf::DW_AT_artificial);
1351 if (!SP.isLocalToUnit())
1352 addFlag(SPDie, dwarf::DW_AT_external);
1354 if (SP.isOptimized())
1355 addFlag(SPDie, dwarf::DW_AT_APPLE_optimized);
1357 if (unsigned isa = Asm->getISAEncoding()) {
1358 addUInt(SPDie, dwarf::DW_AT_APPLE_isa, dwarf::DW_FORM_flag, isa);
1364 // Return const expression if value is a GEP to access merged global
1366 // i8* getelementptr ({ i8, i8, i8, i8 }* @_MergedGlobals, i32 0, i32 0)
1367 static const ConstantExpr *getMergedGlobalExpr(const Value *V) {
1368 const ConstantExpr *CE = dyn_cast_or_null<ConstantExpr>(V);
1369 if (!CE || CE->getNumOperands() != 3 ||
1370 CE->getOpcode() != Instruction::GetElementPtr)
1373 // First operand points to a global struct.
1374 Value *Ptr = CE->getOperand(0);
1375 if (!isa<GlobalValue>(Ptr) ||
1376 !isa<StructType>(cast<PointerType>(Ptr->getType())->getElementType()))
1379 // Second operand is zero.
1380 const ConstantInt *CI = dyn_cast_or_null<ConstantInt>(CE->getOperand(1));
1381 if (!CI || !CI->isZero())
1384 // Third operand is offset.
1385 if (!isa<ConstantInt>(CE->getOperand(2)))
1391 /// createGlobalVariableDIE - create global variable DIE.
1392 void CompileUnit::createGlobalVariableDIE(const MDNode *N) {
1393 // Check for pre-existence.
1397 DIGlobalVariable GV(N);
1398 if (!GV.isGlobalVariable())
1401 DIDescriptor GVContext = GV.getContext();
1402 DIType GTy = GV.getType();
1404 // If this is a static data member definition, some attributes belong
1405 // to the declaration DIE.
1406 DIE *VariableDIE = NULL;
1407 bool IsStaticMember = false;
1408 DIDerivedType SDMDecl = GV.getStaticDataMemberDeclaration();
1409 if (SDMDecl.Verify()) {
1410 assert(SDMDecl.isStaticMember() && "Expected static member decl");
1411 // We need the declaration DIE that is in the static member's class.
1412 // But that class might not exist in the DWARF yet.
1413 // Creating the class will create the static member decl DIE.
1414 getOrCreateContextDIE(DD->resolve(SDMDecl.getContext()));
1415 VariableDIE = getDIE(SDMDecl);
1416 assert(VariableDIE && "Static member decl has no context?");
1417 IsStaticMember = true;
1420 // If this is not a static data member definition, create the variable
1421 // DIE and add the initial set of attributes to it.
1423 VariableDIE = new DIE(GV.getTag());
1425 insertDIE(N, VariableDIE);
1427 // Add name and type.
1428 addString(VariableDIE, dwarf::DW_AT_name, GV.getDisplayName());
1429 addType(VariableDIE, GTy);
1431 // Add scoping info.
1432 if (!GV.isLocalToUnit()) {
1433 addFlag(VariableDIE, dwarf::DW_AT_external);
1434 addGlobalName(GV.getName(), VariableDIE);
1437 // Add line number info.
1438 addSourceLine(VariableDIE, GV);
1439 // Add to context owner.
1440 addToContextOwner(VariableDIE, GVContext);
1444 bool addToAccelTable = false;
1445 DIE *VariableSpecDIE = NULL;
1446 bool isGlobalVariable = GV.getGlobal() != NULL;
1447 if (isGlobalVariable) {
1448 addToAccelTable = true;
1449 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
1450 const MCSymbol *Sym = Asm->Mang->getSymbol(GV.getGlobal());
1451 if (GV.getGlobal()->isThreadLocal()) {
1452 // FIXME: Make this work with -gsplit-dwarf.
1453 unsigned PointerSize = Asm->getDataLayout().getPointerSize();
1454 assert((PointerSize == 4 || PointerSize == 8) &&
1455 "Add support for other sizes if necessary");
1456 const MCExpr *Expr =
1457 Asm->getObjFileLowering().getDebugThreadLocalSymbol(Sym);
1458 // Based on GCC's support for TLS:
1459 if (!DD->useSplitDwarf()) {
1460 // 1) Start with a constNu of the appropriate pointer size
1461 addUInt(Block, 0, dwarf::DW_FORM_data1,
1462 PointerSize == 4 ? dwarf::DW_OP_const4u : dwarf::DW_OP_const8u);
1463 // 2) containing the (relocated) address of the TLS variable
1464 addExpr(Block, 0, dwarf::DW_FORM_udata, Expr);
1466 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_const_index);
1467 addUInt(Block, 0, dwarf::DW_FORM_udata, DU->getAddrPoolIndex(Expr));
1469 // 3) followed by a custom OP to tell the debugger about TLS (presumably)
1470 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_lo_user);
1472 addOpAddress(Block, Sym);
1473 // Do not create specification DIE if context is either compile unit
1475 if (GVContext && GV.isDefinition() && !GVContext.isCompileUnit() &&
1476 !GVContext.isFile() && !DD->isSubprogramContext(GVContext)) {
1477 // Create specification DIE.
1478 VariableSpecDIE = new DIE(dwarf::DW_TAG_variable);
1479 addDIEEntry(VariableSpecDIE, dwarf::DW_AT_specification,
1480 dwarf::DW_FORM_ref4, VariableDIE);
1481 addBlock(VariableSpecDIE, dwarf::DW_AT_location, 0, Block);
1482 // A static member's declaration is already flagged as such.
1483 if (!SDMDecl.Verify())
1484 addFlag(VariableDIE, dwarf::DW_AT_declaration);
1485 addDie(VariableSpecDIE);
1487 addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block);
1489 // Add the linkage name.
1490 StringRef LinkageName = GV.getLinkageName();
1491 if (!LinkageName.empty())
1492 // From DWARF4: DIEs to which DW_AT_linkage_name may apply include:
1493 // TAG_common_block, TAG_constant, TAG_entry_point, TAG_subprogram and
1495 addString(IsStaticMember && VariableSpecDIE ?
1496 VariableSpecDIE : VariableDIE, dwarf::DW_AT_MIPS_linkage_name,
1497 GlobalValue::getRealLinkageName(LinkageName));
1498 } else if (const ConstantInt *CI =
1499 dyn_cast_or_null<ConstantInt>(GV.getConstant())) {
1500 // AT_const_value was added when the static member was created. To avoid
1501 // emitting AT_const_value multiple times, we only add AT_const_value when
1502 // it is not a static member.
1503 if (!IsStaticMember)
1504 addConstantValue(VariableDIE, CI, GTy.isUnsignedDIType());
1505 } else if (const ConstantExpr *CE = getMergedGlobalExpr(N->getOperand(11))) {
1506 addToAccelTable = true;
1507 // GV is a merged global.
1508 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
1509 Value *Ptr = CE->getOperand(0);
1510 addOpAddress(Block, Asm->Mang->getSymbol(cast<GlobalValue>(Ptr)));
1511 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1512 SmallVector<Value*, 3> Idx(CE->op_begin()+1, CE->op_end());
1513 addUInt(Block, 0, dwarf::DW_FORM_udata,
1514 Asm->getDataLayout().getIndexedOffset(Ptr->getType(), Idx));
1515 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
1516 addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block);
1519 if (addToAccelTable) {
1520 DIE *AddrDIE = VariableSpecDIE ? VariableSpecDIE : VariableDIE;
1521 addAccelName(GV.getName(), AddrDIE);
1523 // If the linkage name is different than the name, go ahead and output
1524 // that as well into the name table.
1525 if (GV.getLinkageName() != "" && GV.getName() != GV.getLinkageName())
1526 addAccelName(GV.getLinkageName(), AddrDIE);
1530 /// constructSubrangeDIE - Construct subrange DIE from DISubrange.
1531 void CompileUnit::constructSubrangeDIE(DIE &Buffer, DISubrange SR,
1533 DIE *DW_Subrange = new DIE(dwarf::DW_TAG_subrange_type);
1534 addDIEEntry(DW_Subrange, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IndexTy);
1536 // The LowerBound value defines the lower bounds which is typically zero for
1537 // C/C++. The Count value is the number of elements. Values are 64 bit. If
1538 // Count == -1 then the array is unbounded and we do not emit
1539 // DW_AT_lower_bound and DW_AT_upper_bound attributes. If LowerBound == 0 and
1540 // Count == 0, then the array has zero elements in which case we do not emit
1542 int64_t LowerBound = SR.getLo();
1543 int64_t DefaultLowerBound = getDefaultLowerBound();
1544 int64_t Count = SR.getCount();
1546 if (DefaultLowerBound == -1 || LowerBound != DefaultLowerBound)
1547 addUInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, LowerBound);
1549 if (Count != -1 && Count != 0)
1550 // FIXME: An unbounded array should reference the expression that defines
1552 addUInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, LowerBound + Count - 1);
1554 Buffer.addChild(DW_Subrange);
1557 /// constructArrayTypeDIE - Construct array type DIE from DICompositeType.
1558 void CompileUnit::constructArrayTypeDIE(DIE &Buffer,
1559 DICompositeType *CTy) {
1560 if (CTy->isVector())
1561 addFlag(&Buffer, dwarf::DW_AT_GNU_vector);
1563 // Emit the element type.
1564 addType(&Buffer, CTy->getTypeDerivedFrom());
1566 // Get an anonymous type for index type.
1567 // FIXME: This type should be passed down from the front end
1568 // as different languages may have different sizes for indexes.
1569 DIE *IdxTy = getIndexTyDie();
1571 // Construct an anonymous type for index type.
1572 IdxTy = new DIE(dwarf::DW_TAG_base_type);
1573 addString(IdxTy, dwarf::DW_AT_name, "int");
1574 addUInt(IdxTy, dwarf::DW_AT_byte_size, 0, sizeof(int32_t));
1575 addUInt(IdxTy, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
1576 dwarf::DW_ATE_signed);
1578 setIndexTyDie(IdxTy);
1581 // Add subranges to array type.
1582 DIArray Elements = CTy->getTypeArray();
1583 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1584 DIDescriptor Element = Elements.getElement(i);
1585 if (Element.getTag() == dwarf::DW_TAG_subrange_type)
1586 constructSubrangeDIE(Buffer, DISubrange(Element), IdxTy);
1590 /// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
1591 DIE *CompileUnit::constructEnumTypeDIE(DIEnumerator ETy) {
1592 DIE *Enumerator = new DIE(dwarf::DW_TAG_enumerator);
1593 StringRef Name = ETy.getName();
1594 addString(Enumerator, dwarf::DW_AT_name, Name);
1595 int64_t Value = ETy.getEnumValue();
1596 addSInt(Enumerator, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, Value);
1600 /// constructContainingTypeDIEs - Construct DIEs for types that contain
1602 void CompileUnit::constructContainingTypeDIEs() {
1603 for (DenseMap<DIE *, const MDNode *>::iterator CI = ContainingTypeMap.begin(),
1604 CE = ContainingTypeMap.end(); CI != CE; ++CI) {
1605 DIE *SPDie = CI->first;
1606 const MDNode *N = CI->second;
1608 DIE *NDie = getDIE(N);
1609 if (!NDie) continue;
1610 addDIEEntry(SPDie, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4, NDie);
1614 /// constructVariableDIE - Construct a DIE for the given DbgVariable.
1615 DIE *CompileUnit::constructVariableDIE(DbgVariable *DV,
1616 bool isScopeAbstract) {
1617 StringRef Name = DV->getName();
1619 // Define variable debug information entry.
1620 DIE *VariableDie = new DIE(DV->getTag());
1621 DbgVariable *AbsVar = DV->getAbstractVariable();
1622 DIE *AbsDIE = AbsVar ? AbsVar->getDIE() : NULL;
1624 addDIEEntry(VariableDie, dwarf::DW_AT_abstract_origin,
1625 dwarf::DW_FORM_ref4, AbsDIE);
1628 addString(VariableDie, dwarf::DW_AT_name, Name);
1629 addSourceLine(VariableDie, DV->getVariable());
1630 addType(VariableDie, DV->getType());
1633 if (DV->isArtificial())
1634 addFlag(VariableDie, dwarf::DW_AT_artificial);
1636 if (isScopeAbstract) {
1637 DV->setDIE(VariableDie);
1641 // Add variable address.
1643 unsigned Offset = DV->getDotDebugLocOffset();
1644 if (Offset != ~0U) {
1645 addLabel(VariableDie, dwarf::DW_AT_location, dwarf::DW_FORM_data4,
1646 Asm->GetTempSymbol("debug_loc", Offset));
1647 DV->setDIE(VariableDie);
1651 // Check if variable is described by a DBG_VALUE instruction.
1652 if (const MachineInstr *DVInsn = DV->getMInsn()) {
1653 assert(DVInsn->getNumOperands() == 3);
1654 if (DVInsn->getOperand(0).isReg()) {
1655 const MachineOperand RegOp = DVInsn->getOperand(0);
1656 // If the second operand is an immediate, this is an indirect value.
1657 if (DVInsn->getOperand(1).isImm()) {
1658 MachineLocation Location(RegOp.getReg(), DVInsn->getOperand(1).getImm());
1659 addVariableAddress(*DV, VariableDie, Location);
1660 } else if (RegOp.getReg())
1661 addVariableAddress(*DV, VariableDie, MachineLocation(RegOp.getReg()));
1662 } else if (DVInsn->getOperand(0).isImm())
1663 addConstantValue(VariableDie, DVInsn->getOperand(0), DV->getType());
1664 else if (DVInsn->getOperand(0).isFPImm())
1665 addConstantFPValue(VariableDie, DVInsn->getOperand(0));
1666 else if (DVInsn->getOperand(0).isCImm())
1667 addConstantValue(VariableDie, DVInsn->getOperand(0).getCImm(),
1668 DV->getType().isUnsignedDIType());
1670 DV->setDIE(VariableDie);
1673 // .. else use frame index.
1674 int FI = DV->getFrameIndex();
1676 unsigned FrameReg = 0;
1677 const TargetFrameLowering *TFI = Asm->TM.getFrameLowering();
1679 TFI->getFrameIndexReference(*Asm->MF, FI, FrameReg);
1680 MachineLocation Location(FrameReg, Offset);
1681 addVariableAddress(*DV, VariableDie, Location);
1685 DV->setDIE(VariableDie);
1689 /// createMemberDIE - Create new member DIE.
1690 DIE *CompileUnit::createMemberDIE(DIDerivedType DT) {
1691 DIE *MemberDie = new DIE(DT.getTag());
1692 StringRef Name = DT.getName();
1694 addString(MemberDie, dwarf::DW_AT_name, Name);
1696 addType(MemberDie, DT.getTypeDerivedFrom());
1698 addSourceLine(MemberDie, DT);
1700 DIEBlock *MemLocationDie = new (DIEValueAllocator) DIEBlock();
1701 addUInt(MemLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
1703 uint64_t Size = DT.getSizeInBits();
1704 uint64_t FieldSize = DT.getOriginalTypeSize();
1706 if (Size != FieldSize) {
1708 addUInt(MemberDie, dwarf::DW_AT_byte_size, 0, DT.getOriginalTypeSize()>>3);
1709 addUInt(MemberDie, dwarf::DW_AT_bit_size, 0, DT.getSizeInBits());
1711 uint64_t Offset = DT.getOffsetInBits();
1712 uint64_t AlignMask = ~(DT.getAlignInBits() - 1);
1713 uint64_t HiMark = (Offset + FieldSize) & AlignMask;
1714 uint64_t FieldOffset = (HiMark - FieldSize);
1715 Offset -= FieldOffset;
1717 // Maybe we need to work from the other end.
1718 if (Asm->getDataLayout().isLittleEndian())
1719 Offset = FieldSize - (Offset + Size);
1720 addUInt(MemberDie, dwarf::DW_AT_bit_offset, 0, Offset);
1722 // Here WD_AT_data_member_location points to the anonymous
1723 // field that includes this bit field.
1724 addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, FieldOffset >> 3);
1727 // This is not a bitfield.
1728 addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits() >> 3);
1730 if (DT.getTag() == dwarf::DW_TAG_inheritance
1731 && DT.isVirtual()) {
1733 // For C++, virtual base classes are not at fixed offset. Use following
1734 // expression to extract appropriate offset from vtable.
1735 // BaseAddr = ObAddr + *((*ObAddr) - Offset)
1737 DIEBlock *VBaseLocationDie = new (DIEValueAllocator) DIEBlock();
1738 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_dup);
1739 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
1740 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1741 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits());
1742 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_minus);
1743 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
1744 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
1746 addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0,
1749 addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0, MemLocationDie);
1751 if (DT.isProtected())
1752 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1753 dwarf::DW_ACCESS_protected);
1754 else if (DT.isPrivate())
1755 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1756 dwarf::DW_ACCESS_private);
1757 // Otherwise C++ member and base classes are considered public.
1759 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1760 dwarf::DW_ACCESS_public);
1762 addUInt(MemberDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_data1,
1763 dwarf::DW_VIRTUALITY_virtual);
1765 // Objective-C properties.
1766 if (MDNode *PNode = DT.getObjCProperty())
1767 if (DIEEntry *PropertyDie = getDIEEntry(PNode))
1768 MemberDie->addValue(dwarf::DW_AT_APPLE_property, dwarf::DW_FORM_ref4,
1771 if (DT.isArtificial())
1772 addFlag(MemberDie, dwarf::DW_AT_artificial);
1777 /// createStaticMemberDIE - Create new DIE for C++ static member.
1778 DIE *CompileUnit::createStaticMemberDIE(const DIDerivedType DT) {
1782 DIE *StaticMemberDIE = new DIE(DT.getTag());
1783 DIType Ty = DT.getTypeDerivedFrom();
1785 addString(StaticMemberDIE, dwarf::DW_AT_name, DT.getName());
1786 addType(StaticMemberDIE, Ty);
1787 addSourceLine(StaticMemberDIE, DT);
1788 addFlag(StaticMemberDIE, dwarf::DW_AT_external);
1789 addFlag(StaticMemberDIE, dwarf::DW_AT_declaration);
1791 // FIXME: We could omit private if the parent is a class_type, and
1792 // public if the parent is something else.
1793 if (DT.isProtected())
1794 addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1795 dwarf::DW_ACCESS_protected);
1796 else if (DT.isPrivate())
1797 addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1798 dwarf::DW_ACCESS_private);
1800 addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1801 dwarf::DW_ACCESS_public);
1803 if (const ConstantInt *CI = dyn_cast_or_null<ConstantInt>(DT.getConstant()))
1804 addConstantValue(StaticMemberDIE, CI, Ty.isUnsignedDIType());
1805 if (const ConstantFP *CFP = dyn_cast_or_null<ConstantFP>(DT.getConstant()))
1806 addConstantFPValue(StaticMemberDIE, CFP);
1808 insertDIE(DT, StaticMemberDIE);
1809 return StaticMemberDIE;