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(DIScope 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, DIScope 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 DIScope 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 subprogram argument types 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 a definition (not a declaration), and not scoped
970 // inside a function then separate this out as a type unit.
971 return !CTy.isForwardDecl() && isTypeUnitScoped(CTy, DD);
977 /// constructTypeDIE - Construct type DIE from DICompositeType.
978 void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
979 // Get core information.
980 StringRef Name = CTy.getName();
982 uint64_t Size = CTy.getSizeInBits() >> 3;
983 uint16_t Tag = Buffer.getTag();
986 case dwarf::DW_TAG_array_type:
987 constructArrayTypeDIE(Buffer, &CTy);
989 case dwarf::DW_TAG_enumeration_type: {
990 DIArray Elements = CTy.getTypeArray();
992 // Add enumerators to enumeration type.
993 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
995 DIDescriptor Enum(Elements.getElement(i));
996 if (Enum.isEnumerator()) {
997 ElemDie = constructEnumTypeDIE(DIEnumerator(Enum));
998 Buffer.addChild(ElemDie);
1001 DIType DTy = CTy.getTypeDerivedFrom();
1003 addType(&Buffer, DTy);
1004 addFlag(&Buffer, dwarf::DW_AT_enum_class);
1008 case dwarf::DW_TAG_subroutine_type: {
1009 // Add return type. A void return won't have a type.
1010 DIArray Elements = CTy.getTypeArray();
1011 DIDescriptor RTy = Elements.getElement(0);
1013 addType(&Buffer, DIType(RTy));
1015 bool isPrototyped = true;
1017 for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
1018 DIDescriptor Ty = Elements.getElement(i);
1019 if (Ty.isUnspecifiedParameter()) {
1020 DIE *Arg = new DIE(dwarf::DW_TAG_unspecified_parameters);
1021 Buffer.addChild(Arg);
1022 isPrototyped = false;
1024 DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
1025 addType(Arg, DIType(Ty));
1026 if (DIType(Ty).isArtificial())
1027 addFlag(Arg, dwarf::DW_AT_artificial);
1028 Buffer.addChild(Arg);
1031 // Add prototype flag if we're dealing with a C language and the
1032 // function has been prototyped.
1033 uint16_t Language = DICompileUnit(Node).getLanguage();
1035 (Language == dwarf::DW_LANG_C89 ||
1036 Language == dwarf::DW_LANG_C99 ||
1037 Language == dwarf::DW_LANG_ObjC))
1038 addFlag(&Buffer, dwarf::DW_AT_prototyped);
1041 case dwarf::DW_TAG_structure_type:
1042 case dwarf::DW_TAG_union_type:
1043 case dwarf::DW_TAG_class_type: {
1044 // Add elements to structure type.
1045 DIArray Elements = CTy.getTypeArray();
1046 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1047 DIDescriptor Element = Elements.getElement(i);
1048 DIE *ElemDie = NULL;
1049 if (Element.isSubprogram()) {
1050 DISubprogram SP(Element);
1051 ElemDie = getOrCreateSubprogramDIE(DISubprogram(Element));
1052 if (SP.isProtected())
1053 addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1054 dwarf::DW_ACCESS_protected);
1055 else if (SP.isPrivate())
1056 addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1057 dwarf::DW_ACCESS_private);
1059 addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1060 dwarf::DW_ACCESS_public);
1061 if (SP.isExplicit())
1062 addFlag(ElemDie, dwarf::DW_AT_explicit);
1063 } else if (Element.isDerivedType()) {
1064 DIDerivedType DDTy(Element);
1065 if (DDTy.getTag() == dwarf::DW_TAG_friend) {
1066 ElemDie = new DIE(dwarf::DW_TAG_friend);
1067 addType(ElemDie, DDTy.getTypeDerivedFrom(), dwarf::DW_AT_friend);
1068 } else if (DDTy.isStaticMember())
1069 ElemDie = createStaticMemberDIE(DDTy);
1071 ElemDie = createMemberDIE(DDTy);
1072 Buffer.addChild(ElemDie);
1073 } else if (Element.isObjCProperty()) {
1074 DIObjCProperty Property(Element);
1075 ElemDie = new DIE(Property.getTag());
1076 StringRef PropertyName = Property.getObjCPropertyName();
1077 addString(ElemDie, dwarf::DW_AT_APPLE_property_name, PropertyName);
1078 addType(ElemDie, Property.getType());
1079 addSourceLine(ElemDie, Property);
1080 StringRef GetterName = Property.getObjCPropertyGetterName();
1081 if (!GetterName.empty())
1082 addString(ElemDie, dwarf::DW_AT_APPLE_property_getter, GetterName);
1083 StringRef SetterName = Property.getObjCPropertySetterName();
1084 if (!SetterName.empty())
1085 addString(ElemDie, dwarf::DW_AT_APPLE_property_setter, SetterName);
1086 unsigned PropertyAttributes = 0;
1087 if (Property.isReadOnlyObjCProperty())
1088 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readonly;
1089 if (Property.isReadWriteObjCProperty())
1090 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readwrite;
1091 if (Property.isAssignObjCProperty())
1092 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_assign;
1093 if (Property.isRetainObjCProperty())
1094 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_retain;
1095 if (Property.isCopyObjCProperty())
1096 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_copy;
1097 if (Property.isNonAtomicObjCProperty())
1098 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_nonatomic;
1099 if (PropertyAttributes)
1100 addUInt(ElemDie, dwarf::DW_AT_APPLE_property_attribute, 0,
1101 PropertyAttributes);
1103 DIEEntry *Entry = getDIEEntry(Element);
1105 Entry = createDIEEntry(ElemDie);
1106 insertDIEEntry(Element, Entry);
1108 Buffer.addChild(ElemDie);
1113 if (CTy.isAppleBlockExtension())
1114 addFlag(&Buffer, dwarf::DW_AT_APPLE_block);
1116 DICompositeType ContainingType(DD->resolve(CTy.getContainingType()));
1117 if (DIDescriptor(ContainingType).isCompositeType())
1118 addDIEEntry(&Buffer, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
1119 getOrCreateTypeDIE(DIType(ContainingType)));
1121 if (CTy.isObjcClassComplete())
1122 addFlag(&Buffer, dwarf::DW_AT_APPLE_objc_complete_type);
1124 // Add template parameters to a class, structure or union types.
1125 // FIXME: The support isn't in the metadata for this yet.
1126 if (Tag == dwarf::DW_TAG_class_type ||
1127 Tag == dwarf::DW_TAG_structure_type ||
1128 Tag == dwarf::DW_TAG_union_type)
1129 addTemplateParams(Buffer, CTy.getTemplateParams());
1137 // Add name if not anonymous or intermediate type.
1139 addString(&Buffer, dwarf::DW_AT_name, Name);
1141 if (Tag == dwarf::DW_TAG_enumeration_type ||
1142 Tag == dwarf::DW_TAG_class_type ||
1143 Tag == dwarf::DW_TAG_structure_type ||
1144 Tag == dwarf::DW_TAG_union_type) {
1145 // Add size if non-zero (derived types might be zero-sized.)
1146 // TODO: Do we care about size for enum forward declarations?
1148 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
1149 else if (!CTy.isForwardDecl())
1150 // Add zero size if it is not a forward declaration.
1151 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, 0);
1153 // If we're a forward decl, say so.
1154 if (CTy.isForwardDecl())
1155 addFlag(&Buffer, dwarf::DW_AT_declaration);
1157 // Add source line info if available.
1158 if (!CTy.isForwardDecl())
1159 addSourceLine(&Buffer, CTy);
1161 // No harm in adding the runtime language to the declaration.
1162 unsigned RLang = CTy.getRunTimeLang();
1164 addUInt(&Buffer, dwarf::DW_AT_APPLE_runtime_class,
1165 dwarf::DW_FORM_data1, RLang);
1167 // If this is a type applicable to a type unit it then add it to the
1168 // list of types we'll compute a hash for later.
1169 if (shouldCreateTypeUnit(CTy, DD))
1170 DD->addTypeUnitType(&Buffer);
1173 /// getOrCreateTemplateTypeParameterDIE - Find existing DIE or create new DIE
1174 /// for the given DITemplateTypeParameter.
1176 CompileUnit::getOrCreateTemplateTypeParameterDIE(DITemplateTypeParameter TP) {
1177 DIE *ParamDIE = getDIE(TP);
1181 ParamDIE = new DIE(dwarf::DW_TAG_template_type_parameter);
1182 // Add the type if it exists, it could be void and therefore no type.
1184 addType(ParamDIE, TP.getType());
1185 if (!TP.getName().empty())
1186 addString(ParamDIE, dwarf::DW_AT_name, TP.getName());
1190 /// getOrCreateTemplateValueParameterDIE - Find existing DIE or create new DIE
1191 /// for the given DITemplateValueParameter.
1193 CompileUnit::getOrCreateTemplateValueParameterDIE(DITemplateValueParameter VP) {
1194 DIE *ParamDIE = getDIE(VP);
1198 ParamDIE = new DIE(VP.getTag());
1200 // Add the type if there is one, template template and template parameter
1201 // packs will not have a type.
1203 addType(ParamDIE, VP.getType());
1204 if (!VP.getName().empty())
1205 addString(ParamDIE, dwarf::DW_AT_name, VP.getName());
1206 if (Value *Val = VP.getValue()) {
1207 if (ConstantInt *CI = dyn_cast<ConstantInt>(Val))
1208 addConstantValue(ParamDIE, CI, VP.getType().isUnsignedDIType());
1209 else if (GlobalValue *GV = dyn_cast<GlobalValue>(Val)) {
1210 // For declaration non-type template parameters (such as global values and
1212 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
1213 addOpAddress(Block, Asm->Mang->getSymbol(GV));
1214 // Emit DW_OP_stack_value to use the address as the immediate value of the
1215 // parameter, rather than a pointer to it.
1216 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_stack_value);
1217 addBlock(ParamDIE, dwarf::DW_AT_location, 0, Block);
1218 } else if (VP.getTag() == dwarf::DW_TAG_GNU_template_template_param) {
1219 assert(isa<MDString>(Val));
1220 addString(ParamDIE, dwarf::DW_AT_GNU_template_name,
1221 cast<MDString>(Val)->getString());
1222 } else if (VP.getTag() == dwarf::DW_TAG_GNU_template_parameter_pack) {
1223 assert(isa<MDNode>(Val));
1224 DIArray A(cast<MDNode>(Val));
1225 addTemplateParams(*ParamDIE, A);
1232 /// getOrCreateNameSpace - Create a DIE for DINameSpace.
1233 DIE *CompileUnit::getOrCreateNameSpace(DINameSpace NS) {
1234 DIE *NDie = getDIE(NS);
1237 NDie = new DIE(dwarf::DW_TAG_namespace);
1238 insertDIE(NS, NDie);
1239 if (!NS.getName().empty()) {
1240 addString(NDie, dwarf::DW_AT_name, NS.getName());
1241 addAccelNamespace(NS.getName(), NDie);
1242 addGlobalName(NS.getName(), NDie);
1244 addAccelNamespace("(anonymous namespace)", NDie);
1245 addSourceLine(NDie, NS);
1246 addToContextOwner(NDie, NS.getContext());
1250 /// getOrCreateSubprogramDIE - Create new DIE using SP.
1251 DIE *CompileUnit::getOrCreateSubprogramDIE(DISubprogram SP) {
1252 // Construct the context before querying for the existence of the DIE in case
1253 // such construction creates the DIE (as is the case for member function
1255 DIE *ContextDIE = getOrCreateContextDIE(SP.getContext());
1257 ContextDIE = CUDie.get();
1259 DIE *SPDie = getDIE(SP);
1263 SPDie = new DIE(dwarf::DW_TAG_subprogram);
1265 // DW_TAG_inlined_subroutine may refer to this DIE.
1266 insertDIE(SP, SPDie);
1268 DISubprogram SPDecl = SP.getFunctionDeclaration();
1269 DIE *DeclDie = NULL;
1270 if (SPDecl.isSubprogram()) {
1271 DeclDie = getOrCreateSubprogramDIE(SPDecl);
1274 // Add to context owner.
1275 ContextDIE->addChild(SPDie);
1277 // Add function template parameters.
1278 addTemplateParams(*SPDie, SP.getTemplateParams());
1280 // If this DIE is going to refer declaration info using AT_specification
1281 // then there is no need to add other attributes.
1283 // Refer function declaration directly.
1284 addDIEEntry(SPDie, dwarf::DW_AT_specification, dwarf::DW_FORM_ref4,
1290 // Add the linkage name if we have one.
1291 StringRef LinkageName = SP.getLinkageName();
1292 if (!LinkageName.empty())
1293 addString(SPDie, dwarf::DW_AT_MIPS_linkage_name,
1294 GlobalValue::getRealLinkageName(LinkageName));
1296 // Constructors and operators for anonymous aggregates do not have names.
1297 if (!SP.getName().empty())
1298 addString(SPDie, dwarf::DW_AT_name, SP.getName());
1300 addSourceLine(SPDie, SP);
1302 // Add the prototype if we have a prototype and we have a C like
1304 uint16_t Language = DICompileUnit(Node).getLanguage();
1305 if (SP.isPrototyped() &&
1306 (Language == dwarf::DW_LANG_C89 ||
1307 Language == dwarf::DW_LANG_C99 ||
1308 Language == dwarf::DW_LANG_ObjC))
1309 addFlag(SPDie, dwarf::DW_AT_prototyped);
1311 // Add Return Type. A void return type will not have a type.
1312 DICompositeType SPTy = SP.getType();
1313 assert(SPTy.getTag() == dwarf::DW_TAG_subroutine_type &&
1314 "the type of a subprogram should be a subroutine");
1316 DIArray Args = SPTy.getTypeArray();
1317 if (Args.getElement(0))
1318 addType(SPDie, DIType(Args.getElement(0)));
1320 unsigned VK = SP.getVirtuality();
1322 addUInt(SPDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_data1, VK);
1323 DIEBlock *Block = getDIEBlock();
1324 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1325 addUInt(Block, 0, dwarf::DW_FORM_udata, SP.getVirtualIndex());
1326 addBlock(SPDie, dwarf::DW_AT_vtable_elem_location, 0, Block);
1327 ContainingTypeMap.insert(std::make_pair(SPDie,
1328 DD->resolve(SP.getContainingType())));
1331 if (!SP.isDefinition()) {
1332 addFlag(SPDie, dwarf::DW_AT_declaration);
1334 // Add arguments. Do not add arguments for subprogram definition. They will
1335 // be handled while processing variables.
1336 for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
1337 DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
1338 DIType ATy = DIType(Args.getElement(i));
1340 if (ATy.isArtificial())
1341 addFlag(Arg, dwarf::DW_AT_artificial);
1342 SPDie->addChild(Arg);
1346 if (SP.isArtificial())
1347 addFlag(SPDie, dwarf::DW_AT_artificial);
1349 if (!SP.isLocalToUnit())
1350 addFlag(SPDie, dwarf::DW_AT_external);
1352 if (SP.isOptimized())
1353 addFlag(SPDie, dwarf::DW_AT_APPLE_optimized);
1355 if (unsigned isa = Asm->getISAEncoding()) {
1356 addUInt(SPDie, dwarf::DW_AT_APPLE_isa, dwarf::DW_FORM_flag, isa);
1362 // Return const expression if value is a GEP to access merged global
1364 // i8* getelementptr ({ i8, i8, i8, i8 }* @_MergedGlobals, i32 0, i32 0)
1365 static const ConstantExpr *getMergedGlobalExpr(const Value *V) {
1366 const ConstantExpr *CE = dyn_cast_or_null<ConstantExpr>(V);
1367 if (!CE || CE->getNumOperands() != 3 ||
1368 CE->getOpcode() != Instruction::GetElementPtr)
1371 // First operand points to a global struct.
1372 Value *Ptr = CE->getOperand(0);
1373 if (!isa<GlobalValue>(Ptr) ||
1374 !isa<StructType>(cast<PointerType>(Ptr->getType())->getElementType()))
1377 // Second operand is zero.
1378 const ConstantInt *CI = dyn_cast_or_null<ConstantInt>(CE->getOperand(1));
1379 if (!CI || !CI->isZero())
1382 // Third operand is offset.
1383 if (!isa<ConstantInt>(CE->getOperand(2)))
1389 /// createGlobalVariableDIE - create global variable DIE.
1390 void CompileUnit::createGlobalVariableDIE(const MDNode *N) {
1391 // Check for pre-existence.
1395 DIGlobalVariable GV(N);
1396 if (!GV.isGlobalVariable())
1399 DIScope GVContext = GV.getContext();
1400 DIType GTy = GV.getType();
1402 // If this is a static data member definition, some attributes belong
1403 // to the declaration DIE.
1404 DIE *VariableDIE = NULL;
1405 bool IsStaticMember = false;
1406 DIDerivedType SDMDecl = GV.getStaticDataMemberDeclaration();
1407 if (SDMDecl.Verify()) {
1408 assert(SDMDecl.isStaticMember() && "Expected static member decl");
1409 // We need the declaration DIE that is in the static member's class.
1410 // But that class might not exist in the DWARF yet.
1411 // Creating the class will create the static member decl DIE.
1412 getOrCreateContextDIE(DD->resolve(SDMDecl.getContext()));
1413 VariableDIE = getDIE(SDMDecl);
1414 assert(VariableDIE && "Static member decl has no context?");
1415 IsStaticMember = true;
1418 // If this is not a static data member definition, create the variable
1419 // DIE and add the initial set of attributes to it.
1421 VariableDIE = new DIE(GV.getTag());
1423 insertDIE(N, VariableDIE);
1425 // Add name and type.
1426 addString(VariableDIE, dwarf::DW_AT_name, GV.getDisplayName());
1427 addType(VariableDIE, GTy);
1429 // Add scoping info.
1430 if (!GV.isLocalToUnit()) {
1431 addFlag(VariableDIE, dwarf::DW_AT_external);
1432 addGlobalName(GV.getName(), VariableDIE);
1435 // Add line number info.
1436 addSourceLine(VariableDIE, GV);
1437 // Add to context owner.
1438 addToContextOwner(VariableDIE, GVContext);
1442 bool addToAccelTable = false;
1443 DIE *VariableSpecDIE = NULL;
1444 bool isGlobalVariable = GV.getGlobal() != NULL;
1445 if (isGlobalVariable) {
1446 addToAccelTable = true;
1447 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
1448 const MCSymbol *Sym = Asm->Mang->getSymbol(GV.getGlobal());
1449 if (GV.getGlobal()->isThreadLocal()) {
1450 // FIXME: Make this work with -gsplit-dwarf.
1451 unsigned PointerSize = Asm->getDataLayout().getPointerSize();
1452 assert((PointerSize == 4 || PointerSize == 8) &&
1453 "Add support for other sizes if necessary");
1454 const MCExpr *Expr =
1455 Asm->getObjFileLowering().getDebugThreadLocalSymbol(Sym);
1456 // Based on GCC's support for TLS:
1457 if (!DD->useSplitDwarf()) {
1458 // 1) Start with a constNu of the appropriate pointer size
1459 addUInt(Block, 0, dwarf::DW_FORM_data1,
1460 PointerSize == 4 ? dwarf::DW_OP_const4u : dwarf::DW_OP_const8u);
1461 // 2) containing the (relocated) address of the TLS variable
1462 addExpr(Block, 0, dwarf::DW_FORM_udata, Expr);
1464 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_const_index);
1465 addUInt(Block, 0, dwarf::DW_FORM_udata, DU->getAddrPoolIndex(Expr));
1467 // 3) followed by a custom OP to tell the debugger about TLS (presumably)
1468 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_lo_user);
1470 addOpAddress(Block, Sym);
1471 // Do not create specification DIE if context is either compile unit
1473 if (GVContext && GV.isDefinition() && !GVContext.isCompileUnit() &&
1474 !GVContext.isFile() && !DD->isSubprogramContext(GVContext)) {
1475 // Create specification DIE.
1476 VariableSpecDIE = new DIE(dwarf::DW_TAG_variable);
1477 addDIEEntry(VariableSpecDIE, dwarf::DW_AT_specification,
1478 dwarf::DW_FORM_ref4, VariableDIE);
1479 addBlock(VariableSpecDIE, dwarf::DW_AT_location, 0, Block);
1480 // A static member's declaration is already flagged as such.
1481 if (!SDMDecl.Verify())
1482 addFlag(VariableDIE, dwarf::DW_AT_declaration);
1483 addDie(VariableSpecDIE);
1485 addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block);
1487 // Add the linkage name.
1488 StringRef LinkageName = GV.getLinkageName();
1489 if (!LinkageName.empty())
1490 // From DWARF4: DIEs to which DW_AT_linkage_name may apply include:
1491 // TAG_common_block, TAG_constant, TAG_entry_point, TAG_subprogram and
1493 addString(IsStaticMember && VariableSpecDIE ?
1494 VariableSpecDIE : VariableDIE, dwarf::DW_AT_MIPS_linkage_name,
1495 GlobalValue::getRealLinkageName(LinkageName));
1496 } else if (const ConstantInt *CI =
1497 dyn_cast_or_null<ConstantInt>(GV.getConstant())) {
1498 // AT_const_value was added when the static member was created. To avoid
1499 // emitting AT_const_value multiple times, we only add AT_const_value when
1500 // it is not a static member.
1501 if (!IsStaticMember)
1502 addConstantValue(VariableDIE, CI, GTy.isUnsignedDIType());
1503 } else if (const ConstantExpr *CE = getMergedGlobalExpr(N->getOperand(11))) {
1504 addToAccelTable = true;
1505 // GV is a merged global.
1506 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
1507 Value *Ptr = CE->getOperand(0);
1508 addOpAddress(Block, Asm->Mang->getSymbol(cast<GlobalValue>(Ptr)));
1509 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1510 SmallVector<Value*, 3> Idx(CE->op_begin()+1, CE->op_end());
1511 addUInt(Block, 0, dwarf::DW_FORM_udata,
1512 Asm->getDataLayout().getIndexedOffset(Ptr->getType(), Idx));
1513 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
1514 addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block);
1517 if (addToAccelTable) {
1518 DIE *AddrDIE = VariableSpecDIE ? VariableSpecDIE : VariableDIE;
1519 addAccelName(GV.getName(), AddrDIE);
1521 // If the linkage name is different than the name, go ahead and output
1522 // that as well into the name table.
1523 if (GV.getLinkageName() != "" && GV.getName() != GV.getLinkageName())
1524 addAccelName(GV.getLinkageName(), AddrDIE);
1528 /// constructSubrangeDIE - Construct subrange DIE from DISubrange.
1529 void CompileUnit::constructSubrangeDIE(DIE &Buffer, DISubrange SR,
1531 DIE *DW_Subrange = new DIE(dwarf::DW_TAG_subrange_type);
1532 addDIEEntry(DW_Subrange, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IndexTy);
1534 // The LowerBound value defines the lower bounds which is typically zero for
1535 // C/C++. The Count value is the number of elements. Values are 64 bit. If
1536 // Count == -1 then the array is unbounded and we do not emit
1537 // DW_AT_lower_bound and DW_AT_upper_bound attributes. If LowerBound == 0 and
1538 // Count == 0, then the array has zero elements in which case we do not emit
1540 int64_t LowerBound = SR.getLo();
1541 int64_t DefaultLowerBound = getDefaultLowerBound();
1542 int64_t Count = SR.getCount();
1544 if (DefaultLowerBound == -1 || LowerBound != DefaultLowerBound)
1545 addUInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, LowerBound);
1547 if (Count != -1 && Count != 0)
1548 // FIXME: An unbounded array should reference the expression that defines
1550 addUInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, LowerBound + Count - 1);
1552 Buffer.addChild(DW_Subrange);
1555 /// constructArrayTypeDIE - Construct array type DIE from DICompositeType.
1556 void CompileUnit::constructArrayTypeDIE(DIE &Buffer,
1557 DICompositeType *CTy) {
1558 if (CTy->isVector())
1559 addFlag(&Buffer, dwarf::DW_AT_GNU_vector);
1561 // Emit the element type.
1562 addType(&Buffer, CTy->getTypeDerivedFrom());
1564 // Get an anonymous type for index type.
1565 // FIXME: This type should be passed down from the front end
1566 // as different languages may have different sizes for indexes.
1567 DIE *IdxTy = getIndexTyDie();
1569 // Construct an anonymous type for index type.
1570 IdxTy = new DIE(dwarf::DW_TAG_base_type);
1571 addString(IdxTy, dwarf::DW_AT_name, "int");
1572 addUInt(IdxTy, dwarf::DW_AT_byte_size, 0, sizeof(int32_t));
1573 addUInt(IdxTy, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
1574 dwarf::DW_ATE_signed);
1576 setIndexTyDie(IdxTy);
1579 // Add subranges to array type.
1580 DIArray Elements = CTy->getTypeArray();
1581 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1582 DIDescriptor Element = Elements.getElement(i);
1583 if (Element.getTag() == dwarf::DW_TAG_subrange_type)
1584 constructSubrangeDIE(Buffer, DISubrange(Element), IdxTy);
1588 /// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
1589 DIE *CompileUnit::constructEnumTypeDIE(DIEnumerator ETy) {
1590 DIE *Enumerator = new DIE(dwarf::DW_TAG_enumerator);
1591 StringRef Name = ETy.getName();
1592 addString(Enumerator, dwarf::DW_AT_name, Name);
1593 int64_t Value = ETy.getEnumValue();
1594 addSInt(Enumerator, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, Value);
1598 /// constructContainingTypeDIEs - Construct DIEs for types that contain
1600 void CompileUnit::constructContainingTypeDIEs() {
1601 for (DenseMap<DIE *, const MDNode *>::iterator CI = ContainingTypeMap.begin(),
1602 CE = ContainingTypeMap.end(); CI != CE; ++CI) {
1603 DIE *SPDie = CI->first;
1604 const MDNode *N = CI->second;
1606 DIE *NDie = getDIE(N);
1607 if (!NDie) continue;
1608 addDIEEntry(SPDie, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4, NDie);
1612 /// constructVariableDIE - Construct a DIE for the given DbgVariable.
1613 DIE *CompileUnit::constructVariableDIE(DbgVariable *DV,
1614 bool isScopeAbstract) {
1615 StringRef Name = DV->getName();
1617 // Define variable debug information entry.
1618 DIE *VariableDie = new DIE(DV->getTag());
1619 DbgVariable *AbsVar = DV->getAbstractVariable();
1620 DIE *AbsDIE = AbsVar ? AbsVar->getDIE() : NULL;
1622 addDIEEntry(VariableDie, dwarf::DW_AT_abstract_origin,
1623 dwarf::DW_FORM_ref4, AbsDIE);
1626 addString(VariableDie, dwarf::DW_AT_name, Name);
1627 addSourceLine(VariableDie, DV->getVariable());
1628 addType(VariableDie, DV->getType());
1631 if (DV->isArtificial())
1632 addFlag(VariableDie, dwarf::DW_AT_artificial);
1634 if (isScopeAbstract) {
1635 DV->setDIE(VariableDie);
1639 // Add variable address.
1641 unsigned Offset = DV->getDotDebugLocOffset();
1642 if (Offset != ~0U) {
1643 addLabel(VariableDie, dwarf::DW_AT_location, dwarf::DW_FORM_data4,
1644 Asm->GetTempSymbol("debug_loc", Offset));
1645 DV->setDIE(VariableDie);
1649 // Check if variable is described by a DBG_VALUE instruction.
1650 if (const MachineInstr *DVInsn = DV->getMInsn()) {
1651 assert(DVInsn->getNumOperands() == 3);
1652 if (DVInsn->getOperand(0).isReg()) {
1653 const MachineOperand RegOp = DVInsn->getOperand(0);
1654 // If the second operand is an immediate, this is an indirect value.
1655 if (DVInsn->getOperand(1).isImm()) {
1656 MachineLocation Location(RegOp.getReg(), DVInsn->getOperand(1).getImm());
1657 addVariableAddress(*DV, VariableDie, Location);
1658 } else if (RegOp.getReg())
1659 addVariableAddress(*DV, VariableDie, MachineLocation(RegOp.getReg()));
1660 } else if (DVInsn->getOperand(0).isImm())
1661 addConstantValue(VariableDie, DVInsn->getOperand(0), DV->getType());
1662 else if (DVInsn->getOperand(0).isFPImm())
1663 addConstantFPValue(VariableDie, DVInsn->getOperand(0));
1664 else if (DVInsn->getOperand(0).isCImm())
1665 addConstantValue(VariableDie, DVInsn->getOperand(0).getCImm(),
1666 DV->getType().isUnsignedDIType());
1668 DV->setDIE(VariableDie);
1671 // .. else use frame index.
1672 int FI = DV->getFrameIndex();
1674 unsigned FrameReg = 0;
1675 const TargetFrameLowering *TFI = Asm->TM.getFrameLowering();
1677 TFI->getFrameIndexReference(*Asm->MF, FI, FrameReg);
1678 MachineLocation Location(FrameReg, Offset);
1679 addVariableAddress(*DV, VariableDie, Location);
1683 DV->setDIE(VariableDie);
1687 /// createMemberDIE - Create new member DIE.
1688 DIE *CompileUnit::createMemberDIE(DIDerivedType DT) {
1689 DIE *MemberDie = new DIE(DT.getTag());
1690 StringRef Name = DT.getName();
1692 addString(MemberDie, dwarf::DW_AT_name, Name);
1694 addType(MemberDie, DT.getTypeDerivedFrom());
1696 addSourceLine(MemberDie, DT);
1698 DIEBlock *MemLocationDie = new (DIEValueAllocator) DIEBlock();
1699 addUInt(MemLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
1701 uint64_t Size = DT.getSizeInBits();
1702 uint64_t FieldSize = DT.getOriginalTypeSize();
1704 if (Size != FieldSize) {
1706 addUInt(MemberDie, dwarf::DW_AT_byte_size, 0, DT.getOriginalTypeSize()>>3);
1707 addUInt(MemberDie, dwarf::DW_AT_bit_size, 0, DT.getSizeInBits());
1709 uint64_t Offset = DT.getOffsetInBits();
1710 uint64_t AlignMask = ~(DT.getAlignInBits() - 1);
1711 uint64_t HiMark = (Offset + FieldSize) & AlignMask;
1712 uint64_t FieldOffset = (HiMark - FieldSize);
1713 Offset -= FieldOffset;
1715 // Maybe we need to work from the other end.
1716 if (Asm->getDataLayout().isLittleEndian())
1717 Offset = FieldSize - (Offset + Size);
1718 addUInt(MemberDie, dwarf::DW_AT_bit_offset, 0, Offset);
1720 // Here WD_AT_data_member_location points to the anonymous
1721 // field that includes this bit field.
1722 addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, FieldOffset >> 3);
1725 // This is not a bitfield.
1726 addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits() >> 3);
1728 if (DT.getTag() == dwarf::DW_TAG_inheritance
1729 && DT.isVirtual()) {
1731 // For C++, virtual base classes are not at fixed offset. Use following
1732 // expression to extract appropriate offset from vtable.
1733 // BaseAddr = ObAddr + *((*ObAddr) - Offset)
1735 DIEBlock *VBaseLocationDie = new (DIEValueAllocator) DIEBlock();
1736 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_dup);
1737 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
1738 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1739 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits());
1740 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_minus);
1741 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
1742 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
1744 addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0,
1747 addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0, MemLocationDie);
1749 if (DT.isProtected())
1750 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1751 dwarf::DW_ACCESS_protected);
1752 else if (DT.isPrivate())
1753 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1754 dwarf::DW_ACCESS_private);
1755 // Otherwise C++ member and base classes are considered public.
1757 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1758 dwarf::DW_ACCESS_public);
1760 addUInt(MemberDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_data1,
1761 dwarf::DW_VIRTUALITY_virtual);
1763 // Objective-C properties.
1764 if (MDNode *PNode = DT.getObjCProperty())
1765 if (DIEEntry *PropertyDie = getDIEEntry(PNode))
1766 MemberDie->addValue(dwarf::DW_AT_APPLE_property, dwarf::DW_FORM_ref4,
1769 if (DT.isArtificial())
1770 addFlag(MemberDie, dwarf::DW_AT_artificial);
1775 /// createStaticMemberDIE - Create new DIE for C++ static member.
1776 DIE *CompileUnit::createStaticMemberDIE(const DIDerivedType DT) {
1780 DIE *StaticMemberDIE = new DIE(DT.getTag());
1781 DIType Ty = DT.getTypeDerivedFrom();
1783 addString(StaticMemberDIE, dwarf::DW_AT_name, DT.getName());
1784 addType(StaticMemberDIE, Ty);
1785 addSourceLine(StaticMemberDIE, DT);
1786 addFlag(StaticMemberDIE, dwarf::DW_AT_external);
1787 addFlag(StaticMemberDIE, dwarf::DW_AT_declaration);
1789 // FIXME: We could omit private if the parent is a class_type, and
1790 // public if the parent is something else.
1791 if (DT.isProtected())
1792 addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1793 dwarf::DW_ACCESS_protected);
1794 else if (DT.isPrivate())
1795 addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1796 dwarf::DW_ACCESS_private);
1798 addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1799 dwarf::DW_ACCESS_public);
1801 if (const ConstantInt *CI = dyn_cast_or_null<ConstantInt>(DT.getConstant()))
1802 addConstantValue(StaticMemberDIE, CI, Ty.isUnsignedDIType());
1803 if (const ConstantFP *CFP = dyn_cast_or_null<ConstantFP>(DT.getConstant()))
1804 addConstantFPValue(StaticMemberDIE, CFP);
1806 insertDIE(DT, StaticMemberDIE);
1807 return StaticMemberDIE;