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;
924 // FIXME - Workaround for templates.
925 if (Buffer.getTag() == dwarf::DW_TAG_inheritance)
926 Buffer.setTag(dwarf::DW_TAG_reference_type);
928 uint16_t Tag = Buffer.getTag();
930 // Map to main type, void will not have a type.
931 DIType FromTy = DTy.getTypeDerivedFrom();
933 addType(&Buffer, FromTy);
935 // Add name if not anonymous or intermediate type.
937 addString(&Buffer, dwarf::DW_AT_name, Name);
939 // Add size if non-zero (derived types might be zero-sized.)
940 if (Size && Tag != dwarf::DW_TAG_pointer_type)
941 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
943 if (Tag == dwarf::DW_TAG_ptr_to_member_type)
944 addDIEEntry(&Buffer, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
945 getOrCreateTypeDIE(DD->resolve(DTy.getClassType())));
946 // Add source line info if available and TyDesc is not a forward declaration.
947 if (!DTy.isForwardDecl())
948 addSourceLine(&Buffer, DTy);
951 /// Return true if the type is appropriately scoped to be contained inside
952 /// its own type unit.
953 static bool isTypeUnitScoped(DIType Ty, const DwarfDebug *DD) {
954 DIScope Parent = DD->resolve(Ty.getContext());
956 // Don't generate a hash for anything scoped inside a function.
957 if (Parent.isSubprogram())
959 Parent = DD->resolve(Parent.getContext());
964 /// Return true if the type should be split out into a type unit.
965 static bool shouldCreateTypeUnit(DICompositeType CTy, const DwarfDebug *DD) {
966 uint16_t Tag = CTy.getTag();
969 case dwarf::DW_TAG_structure_type:
970 case dwarf::DW_TAG_union_type:
971 case dwarf::DW_TAG_enumeration_type:
972 case dwarf::DW_TAG_class_type:
973 // If this is a class, structure, union, or enumeration type
974 // that is not a declaration, is a type definition, and not scoped
975 // inside a function then separate this out as a type unit.
976 if (CTy.isForwardDecl() || !isTypeUnitScoped(CTy, DD))
984 /// constructTypeDIE - Construct type DIE from DICompositeType.
985 void CompileUnit::constructTypeDIE(DIE &Buffer, DICompositeType CTy) {
986 // Get core information.
987 StringRef Name = CTy.getName();
989 uint64_t Size = CTy.getSizeInBits() >> 3;
990 uint16_t Tag = Buffer.getTag();
993 case dwarf::DW_TAG_array_type:
994 constructArrayTypeDIE(Buffer, &CTy);
996 case dwarf::DW_TAG_enumeration_type: {
997 DIArray Elements = CTy.getTypeArray();
999 // Add enumerators to enumeration type.
1000 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1001 DIE *ElemDie = NULL;
1002 DIDescriptor Enum(Elements.getElement(i));
1003 if (Enum.isEnumerator()) {
1004 ElemDie = constructEnumTypeDIE(DIEnumerator(Enum));
1005 Buffer.addChild(ElemDie);
1008 DIType DTy = CTy.getTypeDerivedFrom();
1010 addType(&Buffer, DTy);
1011 addFlag(&Buffer, dwarf::DW_AT_enum_class);
1015 case dwarf::DW_TAG_subroutine_type: {
1016 // Add return type. A void return won't have a type.
1017 DIArray Elements = CTy.getTypeArray();
1018 DIDescriptor RTy = Elements.getElement(0);
1020 addType(&Buffer, DIType(RTy));
1022 bool isPrototyped = true;
1024 for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) {
1025 DIDescriptor Ty = Elements.getElement(i);
1026 if (Ty.isUnspecifiedParameter()) {
1027 DIE *Arg = new DIE(dwarf::DW_TAG_unspecified_parameters);
1028 Buffer.addChild(Arg);
1029 isPrototyped = false;
1031 DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
1032 addType(Arg, DIType(Ty));
1033 if (DIType(Ty).isArtificial())
1034 addFlag(Arg, dwarf::DW_AT_artificial);
1035 Buffer.addChild(Arg);
1038 // Add prototype flag if we're dealing with a C language and the
1039 // function has been prototyped.
1040 uint16_t Language = DICompileUnit(Node).getLanguage();
1042 (Language == dwarf::DW_LANG_C89 ||
1043 Language == dwarf::DW_LANG_C99 ||
1044 Language == dwarf::DW_LANG_ObjC))
1045 addFlag(&Buffer, dwarf::DW_AT_prototyped);
1048 case dwarf::DW_TAG_structure_type:
1049 case dwarf::DW_TAG_union_type:
1050 case dwarf::DW_TAG_class_type: {
1051 // Add elements to structure type.
1052 DIArray Elements = CTy.getTypeArray();
1053 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1054 DIDescriptor Element = Elements.getElement(i);
1055 DIE *ElemDie = NULL;
1056 if (Element.isSubprogram()) {
1057 DISubprogram SP(Element);
1058 ElemDie = getOrCreateSubprogramDIE(DISubprogram(Element));
1059 if (SP.isProtected())
1060 addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1061 dwarf::DW_ACCESS_protected);
1062 else if (SP.isPrivate())
1063 addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1064 dwarf::DW_ACCESS_private);
1066 addUInt(ElemDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1067 dwarf::DW_ACCESS_public);
1068 if (SP.isExplicit())
1069 addFlag(ElemDie, dwarf::DW_AT_explicit);
1070 } else if (Element.isDerivedType()) {
1071 DIDerivedType DDTy(Element);
1072 if (DDTy.getTag() == dwarf::DW_TAG_friend) {
1073 ElemDie = new DIE(dwarf::DW_TAG_friend);
1074 addType(ElemDie, DDTy.getTypeDerivedFrom(), dwarf::DW_AT_friend);
1075 } else if (DDTy.isStaticMember())
1076 ElemDie = createStaticMemberDIE(DDTy);
1078 ElemDie = createMemberDIE(DDTy);
1079 Buffer.addChild(ElemDie);
1080 } else if (Element.isObjCProperty()) {
1081 DIObjCProperty Property(Element);
1082 ElemDie = new DIE(Property.getTag());
1083 StringRef PropertyName = Property.getObjCPropertyName();
1084 addString(ElemDie, dwarf::DW_AT_APPLE_property_name, PropertyName);
1085 addType(ElemDie, Property.getType());
1086 addSourceLine(ElemDie, Property);
1087 StringRef GetterName = Property.getObjCPropertyGetterName();
1088 if (!GetterName.empty())
1089 addString(ElemDie, dwarf::DW_AT_APPLE_property_getter, GetterName);
1090 StringRef SetterName = Property.getObjCPropertySetterName();
1091 if (!SetterName.empty())
1092 addString(ElemDie, dwarf::DW_AT_APPLE_property_setter, SetterName);
1093 unsigned PropertyAttributes = 0;
1094 if (Property.isReadOnlyObjCProperty())
1095 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readonly;
1096 if (Property.isReadWriteObjCProperty())
1097 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_readwrite;
1098 if (Property.isAssignObjCProperty())
1099 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_assign;
1100 if (Property.isRetainObjCProperty())
1101 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_retain;
1102 if (Property.isCopyObjCProperty())
1103 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_copy;
1104 if (Property.isNonAtomicObjCProperty())
1105 PropertyAttributes |= dwarf::DW_APPLE_PROPERTY_nonatomic;
1106 if (PropertyAttributes)
1107 addUInt(ElemDie, dwarf::DW_AT_APPLE_property_attribute, 0,
1108 PropertyAttributes);
1110 DIEEntry *Entry = getDIEEntry(Element);
1112 Entry = createDIEEntry(ElemDie);
1113 insertDIEEntry(Element, Entry);
1115 Buffer.addChild(ElemDie);
1120 if (CTy.isAppleBlockExtension())
1121 addFlag(&Buffer, dwarf::DW_AT_APPLE_block);
1123 DICompositeType ContainingType(DD->resolve(CTy.getContainingType()));
1124 if (DIDescriptor(ContainingType).isCompositeType())
1125 addDIEEntry(&Buffer, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4,
1126 getOrCreateTypeDIE(DIType(ContainingType)));
1128 if (CTy.isObjcClassComplete())
1129 addFlag(&Buffer, dwarf::DW_AT_APPLE_objc_complete_type);
1131 // Add template parameters to a class, structure or union types.
1132 // FIXME: The support isn't in the metadata for this yet.
1133 if (Tag == dwarf::DW_TAG_class_type ||
1134 Tag == dwarf::DW_TAG_structure_type ||
1135 Tag == dwarf::DW_TAG_union_type)
1136 addTemplateParams(Buffer, CTy.getTemplateParams());
1144 // Add name if not anonymous or intermediate type.
1146 addString(&Buffer, dwarf::DW_AT_name, Name);
1148 if (Tag == dwarf::DW_TAG_enumeration_type ||
1149 Tag == dwarf::DW_TAG_class_type ||
1150 Tag == dwarf::DW_TAG_structure_type ||
1151 Tag == dwarf::DW_TAG_union_type) {
1152 // Add size if non-zero (derived types might be zero-sized.)
1153 // TODO: Do we care about size for enum forward declarations?
1155 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, Size);
1156 else if (!CTy.isForwardDecl())
1157 // Add zero size if it is not a forward declaration.
1158 addUInt(&Buffer, dwarf::DW_AT_byte_size, 0, 0);
1160 // If we're a forward decl, say so.
1161 if (CTy.isForwardDecl())
1162 addFlag(&Buffer, dwarf::DW_AT_declaration);
1164 // Add source line info if available.
1165 if (!CTy.isForwardDecl())
1166 addSourceLine(&Buffer, CTy);
1168 // No harm in adding the runtime language to the declaration.
1169 unsigned RLang = CTy.getRunTimeLang();
1171 addUInt(&Buffer, dwarf::DW_AT_APPLE_runtime_class,
1172 dwarf::DW_FORM_data1, RLang);
1174 // If this is a type applicable to a type unit it then add it to the
1175 // list of types we'll compute a hash for later.
1176 if (shouldCreateTypeUnit(CTy, DD))
1177 DD->addTypeUnitType(&Buffer);
1180 /// getOrCreateTemplateTypeParameterDIE - Find existing DIE or create new DIE
1181 /// for the given DITemplateTypeParameter.
1183 CompileUnit::getOrCreateTemplateTypeParameterDIE(DITemplateTypeParameter TP) {
1184 DIE *ParamDIE = getDIE(TP);
1188 ParamDIE = new DIE(dwarf::DW_TAG_template_type_parameter);
1189 // Add the type if it exists, it could be void and therefore no type.
1191 addType(ParamDIE, TP.getType());
1192 if (!TP.getName().empty())
1193 addString(ParamDIE, dwarf::DW_AT_name, TP.getName());
1197 /// getOrCreateTemplateValueParameterDIE - Find existing DIE or create new DIE
1198 /// for the given DITemplateValueParameter.
1200 CompileUnit::getOrCreateTemplateValueParameterDIE(DITemplateValueParameter VP) {
1201 DIE *ParamDIE = getDIE(VP);
1205 ParamDIE = new DIE(VP.getTag());
1207 // Add the type if there is one, template template and template parameter
1208 // packs will not have a type.
1210 addType(ParamDIE, VP.getType());
1211 if (!VP.getName().empty())
1212 addString(ParamDIE, dwarf::DW_AT_name, VP.getName());
1213 if (Value *Val = VP.getValue()) {
1214 if (ConstantInt *CI = dyn_cast<ConstantInt>(Val))
1215 addConstantValue(ParamDIE, CI, VP.getType().isUnsignedDIType());
1216 else if (GlobalValue *GV = dyn_cast<GlobalValue>(Val)) {
1217 // For declaration non-type template parameters (such as global values and
1219 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
1220 addOpAddress(Block, Asm->Mang->getSymbol(GV));
1221 // Emit DW_OP_stack_value to use the address as the immediate value of the
1222 // parameter, rather than a pointer to it.
1223 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_stack_value);
1224 addBlock(ParamDIE, dwarf::DW_AT_location, 0, Block);
1225 } else if (VP.getTag() == dwarf::DW_TAG_GNU_template_template_param) {
1226 assert(isa<MDString>(Val));
1227 addString(ParamDIE, dwarf::DW_AT_GNU_template_name,
1228 cast<MDString>(Val)->getString());
1229 } else if (VP.getTag() == dwarf::DW_TAG_GNU_template_parameter_pack) {
1230 assert(isa<MDNode>(Val));
1231 DIArray A(cast<MDNode>(Val));
1232 addTemplateParams(*ParamDIE, A);
1239 /// getOrCreateNameSpace - Create a DIE for DINameSpace.
1240 DIE *CompileUnit::getOrCreateNameSpace(DINameSpace NS) {
1241 DIE *NDie = getDIE(NS);
1244 NDie = new DIE(dwarf::DW_TAG_namespace);
1245 insertDIE(NS, NDie);
1246 if (!NS.getName().empty()) {
1247 addString(NDie, dwarf::DW_AT_name, NS.getName());
1248 addAccelNamespace(NS.getName(), NDie);
1249 addGlobalName(NS.getName(), NDie);
1251 addAccelNamespace("(anonymous namespace)", NDie);
1252 addSourceLine(NDie, NS);
1253 addToContextOwner(NDie, NS.getContext());
1257 /// getOrCreateSubprogramDIE - Create new DIE using SP.
1258 DIE *CompileUnit::getOrCreateSubprogramDIE(DISubprogram SP) {
1259 // Construct the context before querying for the existence of the DIE in case
1260 // such construction creates the DIE (as is the case for member function
1262 DIE *ContextDIE = getOrCreateContextDIE(SP.getContext());
1264 ContextDIE = CUDie.get();
1266 DIE *SPDie = getDIE(SP);
1270 SPDie = new DIE(dwarf::DW_TAG_subprogram);
1272 // DW_TAG_inlined_subroutine may refer to this DIE.
1273 insertDIE(SP, SPDie);
1275 DISubprogram SPDecl = SP.getFunctionDeclaration();
1276 DIE *DeclDie = NULL;
1277 if (SPDecl.isSubprogram()) {
1278 DeclDie = getOrCreateSubprogramDIE(SPDecl);
1281 // Add to context owner.
1282 ContextDIE->addChild(SPDie);
1284 // Add function template parameters.
1285 addTemplateParams(*SPDie, SP.getTemplateParams());
1287 // If this DIE is going to refer declaration info using AT_specification
1288 // then there is no need to add other attributes.
1290 // Refer function declaration directly.
1291 addDIEEntry(SPDie, dwarf::DW_AT_specification, dwarf::DW_FORM_ref4,
1297 // Add the linkage name if we have one.
1298 StringRef LinkageName = SP.getLinkageName();
1299 if (!LinkageName.empty())
1300 addString(SPDie, dwarf::DW_AT_MIPS_linkage_name,
1301 GlobalValue::getRealLinkageName(LinkageName));
1303 // Constructors and operators for anonymous aggregates do not have names.
1304 if (!SP.getName().empty())
1305 addString(SPDie, dwarf::DW_AT_name, SP.getName());
1307 addSourceLine(SPDie, SP);
1309 // Add the prototype if we have a prototype and we have a C like
1311 uint16_t Language = DICompileUnit(Node).getLanguage();
1312 if (SP.isPrototyped() &&
1313 (Language == dwarf::DW_LANG_C89 ||
1314 Language == dwarf::DW_LANG_C99 ||
1315 Language == dwarf::DW_LANG_ObjC))
1316 addFlag(SPDie, dwarf::DW_AT_prototyped);
1318 // Add Return Type. A void return type will not have a type.
1319 DICompositeType SPTy = SP.getType();
1320 assert(SPTy.getTag() == dwarf::DW_TAG_subroutine_type &&
1321 "the type of a subprogram should be a subroutine");
1323 DIArray Args = SPTy.getTypeArray();
1324 if (Args.getElement(0))
1325 addType(SPDie, DIType(Args.getElement(0)));
1327 unsigned VK = SP.getVirtuality();
1329 addUInt(SPDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_data1, VK);
1330 DIEBlock *Block = getDIEBlock();
1331 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1332 addUInt(Block, 0, dwarf::DW_FORM_udata, SP.getVirtualIndex());
1333 addBlock(SPDie, dwarf::DW_AT_vtable_elem_location, 0, Block);
1334 ContainingTypeMap.insert(std::make_pair(SPDie,
1335 DD->resolve(SP.getContainingType())));
1338 if (!SP.isDefinition()) {
1339 addFlag(SPDie, dwarf::DW_AT_declaration);
1341 // Add arguments. Do not add arguments for subprogram definition. They will
1342 // be handled while processing variables.
1343 for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) {
1344 DIE *Arg = new DIE(dwarf::DW_TAG_formal_parameter);
1345 DIType ATy = DIType(Args.getElement(i));
1347 if (ATy.isArtificial())
1348 addFlag(Arg, dwarf::DW_AT_artificial);
1349 SPDie->addChild(Arg);
1353 if (SP.isArtificial())
1354 addFlag(SPDie, dwarf::DW_AT_artificial);
1356 if (!SP.isLocalToUnit())
1357 addFlag(SPDie, dwarf::DW_AT_external);
1359 if (SP.isOptimized())
1360 addFlag(SPDie, dwarf::DW_AT_APPLE_optimized);
1362 if (unsigned isa = Asm->getISAEncoding()) {
1363 addUInt(SPDie, dwarf::DW_AT_APPLE_isa, dwarf::DW_FORM_flag, isa);
1369 // Return const expression if value is a GEP to access merged global
1371 // i8* getelementptr ({ i8, i8, i8, i8 }* @_MergedGlobals, i32 0, i32 0)
1372 static const ConstantExpr *getMergedGlobalExpr(const Value *V) {
1373 const ConstantExpr *CE = dyn_cast_or_null<ConstantExpr>(V);
1374 if (!CE || CE->getNumOperands() != 3 ||
1375 CE->getOpcode() != Instruction::GetElementPtr)
1378 // First operand points to a global struct.
1379 Value *Ptr = CE->getOperand(0);
1380 if (!isa<GlobalValue>(Ptr) ||
1381 !isa<StructType>(cast<PointerType>(Ptr->getType())->getElementType()))
1384 // Second operand is zero.
1385 const ConstantInt *CI = dyn_cast_or_null<ConstantInt>(CE->getOperand(1));
1386 if (!CI || !CI->isZero())
1389 // Third operand is offset.
1390 if (!isa<ConstantInt>(CE->getOperand(2)))
1396 /// createGlobalVariableDIE - create global variable DIE.
1397 void CompileUnit::createGlobalVariableDIE(const MDNode *N) {
1398 // Check for pre-existence.
1402 DIGlobalVariable GV(N);
1403 if (!GV.isGlobalVariable())
1406 DIDescriptor GVContext = GV.getContext();
1407 DIType GTy = GV.getType();
1409 // If this is a static data member definition, some attributes belong
1410 // to the declaration DIE.
1411 DIE *VariableDIE = NULL;
1412 bool IsStaticMember = false;
1413 DIDerivedType SDMDecl = GV.getStaticDataMemberDeclaration();
1414 if (SDMDecl.Verify()) {
1415 assert(SDMDecl.isStaticMember() && "Expected static member decl");
1416 // We need the declaration DIE that is in the static member's class.
1417 // But that class might not exist in the DWARF yet.
1418 // Creating the class will create the static member decl DIE.
1419 getOrCreateContextDIE(DD->resolve(SDMDecl.getContext()));
1420 VariableDIE = getDIE(SDMDecl);
1421 assert(VariableDIE && "Static member decl has no context?");
1422 IsStaticMember = true;
1425 // If this is not a static data member definition, create the variable
1426 // DIE and add the initial set of attributes to it.
1428 VariableDIE = new DIE(GV.getTag());
1430 insertDIE(N, VariableDIE);
1432 // Add name and type.
1433 addString(VariableDIE, dwarf::DW_AT_name, GV.getDisplayName());
1434 addType(VariableDIE, GTy);
1436 // Add scoping info.
1437 if (!GV.isLocalToUnit()) {
1438 addFlag(VariableDIE, dwarf::DW_AT_external);
1439 addGlobalName(GV.getName(), VariableDIE);
1442 // Add line number info.
1443 addSourceLine(VariableDIE, GV);
1444 // Add to context owner.
1445 addToContextOwner(VariableDIE, GVContext);
1449 bool addToAccelTable = false;
1450 DIE *VariableSpecDIE = NULL;
1451 bool isGlobalVariable = GV.getGlobal() != NULL;
1452 if (isGlobalVariable) {
1453 addToAccelTable = true;
1454 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
1455 const MCSymbol *Sym = Asm->Mang->getSymbol(GV.getGlobal());
1456 if (GV.getGlobal()->isThreadLocal()) {
1457 // FIXME: Make this work with -gsplit-dwarf.
1458 unsigned PointerSize = Asm->getDataLayout().getPointerSize();
1459 assert((PointerSize == 4 || PointerSize == 8) &&
1460 "Add support for other sizes if necessary");
1461 const MCExpr *Expr =
1462 Asm->getObjFileLowering().getDebugThreadLocalSymbol(Sym);
1463 // Based on GCC's support for TLS:
1464 if (!DD->useSplitDwarf()) {
1465 // 1) Start with a constNu of the appropriate pointer size
1466 addUInt(Block, 0, dwarf::DW_FORM_data1,
1467 PointerSize == 4 ? dwarf::DW_OP_const4u : dwarf::DW_OP_const8u);
1468 // 2) containing the (relocated) address of the TLS variable
1469 addExpr(Block, 0, dwarf::DW_FORM_udata, Expr);
1471 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_GNU_const_index);
1472 addUInt(Block, 0, dwarf::DW_FORM_udata, DU->getAddrPoolIndex(Expr));
1474 // 3) followed by a custom OP to tell the debugger about TLS (presumably)
1475 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_lo_user);
1477 addOpAddress(Block, Sym);
1478 // Do not create specification DIE if context is either compile unit
1480 if (GVContext && GV.isDefinition() && !GVContext.isCompileUnit() &&
1481 !GVContext.isFile() && !DD->isSubprogramContext(GVContext)) {
1482 // Create specification DIE.
1483 VariableSpecDIE = new DIE(dwarf::DW_TAG_variable);
1484 addDIEEntry(VariableSpecDIE, dwarf::DW_AT_specification,
1485 dwarf::DW_FORM_ref4, VariableDIE);
1486 addBlock(VariableSpecDIE, dwarf::DW_AT_location, 0, Block);
1487 // A static member's declaration is already flagged as such.
1488 if (!SDMDecl.Verify())
1489 addFlag(VariableDIE, dwarf::DW_AT_declaration);
1490 addDie(VariableSpecDIE);
1492 addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block);
1494 // Add the linkage name.
1495 StringRef LinkageName = GV.getLinkageName();
1496 if (!LinkageName.empty())
1497 // From DWARF4: DIEs to which DW_AT_linkage_name may apply include:
1498 // TAG_common_block, TAG_constant, TAG_entry_point, TAG_subprogram and
1500 addString(IsStaticMember && VariableSpecDIE ?
1501 VariableSpecDIE : VariableDIE, dwarf::DW_AT_MIPS_linkage_name,
1502 GlobalValue::getRealLinkageName(LinkageName));
1503 } else if (const ConstantInt *CI =
1504 dyn_cast_or_null<ConstantInt>(GV.getConstant())) {
1505 // AT_const_value was added when the static member was created. To avoid
1506 // emitting AT_const_value multiple times, we only add AT_const_value when
1507 // it is not a static member.
1508 if (!IsStaticMember)
1509 addConstantValue(VariableDIE, CI, GTy.isUnsignedDIType());
1510 } else if (const ConstantExpr *CE = getMergedGlobalExpr(N->getOperand(11))) {
1511 addToAccelTable = true;
1512 // GV is a merged global.
1513 DIEBlock *Block = new (DIEValueAllocator) DIEBlock();
1514 Value *Ptr = CE->getOperand(0);
1515 addOpAddress(Block, Asm->Mang->getSymbol(cast<GlobalValue>(Ptr)));
1516 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1517 SmallVector<Value*, 3> Idx(CE->op_begin()+1, CE->op_end());
1518 addUInt(Block, 0, dwarf::DW_FORM_udata,
1519 Asm->getDataLayout().getIndexedOffset(Ptr->getType(), Idx));
1520 addUInt(Block, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
1521 addBlock(VariableDIE, dwarf::DW_AT_location, 0, Block);
1524 if (addToAccelTable) {
1525 DIE *AddrDIE = VariableSpecDIE ? VariableSpecDIE : VariableDIE;
1526 addAccelName(GV.getName(), AddrDIE);
1528 // If the linkage name is different than the name, go ahead and output
1529 // that as well into the name table.
1530 if (GV.getLinkageName() != "" && GV.getName() != GV.getLinkageName())
1531 addAccelName(GV.getLinkageName(), AddrDIE);
1535 /// constructSubrangeDIE - Construct subrange DIE from DISubrange.
1536 void CompileUnit::constructSubrangeDIE(DIE &Buffer, DISubrange SR,
1538 DIE *DW_Subrange = new DIE(dwarf::DW_TAG_subrange_type);
1539 addDIEEntry(DW_Subrange, dwarf::DW_AT_type, dwarf::DW_FORM_ref4, IndexTy);
1541 // The LowerBound value defines the lower bounds which is typically zero for
1542 // C/C++. The Count value is the number of elements. Values are 64 bit. If
1543 // Count == -1 then the array is unbounded and we do not emit
1544 // DW_AT_lower_bound and DW_AT_upper_bound attributes. If LowerBound == 0 and
1545 // Count == 0, then the array has zero elements in which case we do not emit
1547 int64_t LowerBound = SR.getLo();
1548 int64_t DefaultLowerBound = getDefaultLowerBound();
1549 int64_t Count = SR.getCount();
1551 if (DefaultLowerBound == -1 || LowerBound != DefaultLowerBound)
1552 addUInt(DW_Subrange, dwarf::DW_AT_lower_bound, 0, LowerBound);
1554 if (Count != -1 && Count != 0)
1555 // FIXME: An unbounded array should reference the expression that defines
1557 addUInt(DW_Subrange, dwarf::DW_AT_upper_bound, 0, LowerBound + Count - 1);
1559 Buffer.addChild(DW_Subrange);
1562 /// constructArrayTypeDIE - Construct array type DIE from DICompositeType.
1563 void CompileUnit::constructArrayTypeDIE(DIE &Buffer,
1564 DICompositeType *CTy) {
1565 if (CTy->isVector())
1566 addFlag(&Buffer, dwarf::DW_AT_GNU_vector);
1568 // Emit the element type.
1569 addType(&Buffer, CTy->getTypeDerivedFrom());
1571 // Get an anonymous type for index type.
1572 // FIXME: This type should be passed down from the front end
1573 // as different languages may have different sizes for indexes.
1574 DIE *IdxTy = getIndexTyDie();
1576 // Construct an anonymous type for index type.
1577 IdxTy = new DIE(dwarf::DW_TAG_base_type);
1578 addString(IdxTy, dwarf::DW_AT_name, "int");
1579 addUInt(IdxTy, dwarf::DW_AT_byte_size, 0, sizeof(int32_t));
1580 addUInt(IdxTy, dwarf::DW_AT_encoding, dwarf::DW_FORM_data1,
1581 dwarf::DW_ATE_signed);
1583 setIndexTyDie(IdxTy);
1586 // Add subranges to array type.
1587 DIArray Elements = CTy->getTypeArray();
1588 for (unsigned i = 0, N = Elements.getNumElements(); i < N; ++i) {
1589 DIDescriptor Element = Elements.getElement(i);
1590 if (Element.getTag() == dwarf::DW_TAG_subrange_type)
1591 constructSubrangeDIE(Buffer, DISubrange(Element), IdxTy);
1595 /// constructEnumTypeDIE - Construct enum type DIE from DIEnumerator.
1596 DIE *CompileUnit::constructEnumTypeDIE(DIEnumerator ETy) {
1597 DIE *Enumerator = new DIE(dwarf::DW_TAG_enumerator);
1598 StringRef Name = ETy.getName();
1599 addString(Enumerator, dwarf::DW_AT_name, Name);
1600 int64_t Value = ETy.getEnumValue();
1601 addSInt(Enumerator, dwarf::DW_AT_const_value, dwarf::DW_FORM_sdata, Value);
1605 /// constructContainingTypeDIEs - Construct DIEs for types that contain
1607 void CompileUnit::constructContainingTypeDIEs() {
1608 for (DenseMap<DIE *, const MDNode *>::iterator CI = ContainingTypeMap.begin(),
1609 CE = ContainingTypeMap.end(); CI != CE; ++CI) {
1610 DIE *SPDie = CI->first;
1611 const MDNode *N = CI->second;
1613 DIE *NDie = getDIE(N);
1614 if (!NDie) continue;
1615 addDIEEntry(SPDie, dwarf::DW_AT_containing_type, dwarf::DW_FORM_ref4, NDie);
1619 /// constructVariableDIE - Construct a DIE for the given DbgVariable.
1620 DIE *CompileUnit::constructVariableDIE(DbgVariable *DV,
1621 bool isScopeAbstract) {
1622 StringRef Name = DV->getName();
1624 // Define variable debug information entry.
1625 DIE *VariableDie = new DIE(DV->getTag());
1626 DbgVariable *AbsVar = DV->getAbstractVariable();
1627 DIE *AbsDIE = AbsVar ? AbsVar->getDIE() : NULL;
1629 addDIEEntry(VariableDie, dwarf::DW_AT_abstract_origin,
1630 dwarf::DW_FORM_ref4, AbsDIE);
1633 addString(VariableDie, dwarf::DW_AT_name, Name);
1634 addSourceLine(VariableDie, DV->getVariable());
1635 addType(VariableDie, DV->getType());
1638 if (DV->isArtificial())
1639 addFlag(VariableDie, dwarf::DW_AT_artificial);
1641 if (isScopeAbstract) {
1642 DV->setDIE(VariableDie);
1646 // Add variable address.
1648 unsigned Offset = DV->getDotDebugLocOffset();
1649 if (Offset != ~0U) {
1650 addLabel(VariableDie, dwarf::DW_AT_location, dwarf::DW_FORM_data4,
1651 Asm->GetTempSymbol("debug_loc", Offset));
1652 DV->setDIE(VariableDie);
1656 // Check if variable is described by a DBG_VALUE instruction.
1657 if (const MachineInstr *DVInsn = DV->getMInsn()) {
1658 assert(DVInsn->getNumOperands() == 3);
1659 if (DVInsn->getOperand(0).isReg()) {
1660 const MachineOperand RegOp = DVInsn->getOperand(0);
1661 // If the second operand is an immediate, this is an indirect value.
1662 if (DVInsn->getOperand(1).isImm()) {
1663 MachineLocation Location(RegOp.getReg(), DVInsn->getOperand(1).getImm());
1664 addVariableAddress(*DV, VariableDie, Location);
1665 } else if (RegOp.getReg())
1666 addVariableAddress(*DV, VariableDie, MachineLocation(RegOp.getReg()));
1667 } else if (DVInsn->getOperand(0).isImm())
1668 addConstantValue(VariableDie, DVInsn->getOperand(0), DV->getType());
1669 else if (DVInsn->getOperand(0).isFPImm())
1670 addConstantFPValue(VariableDie, DVInsn->getOperand(0));
1671 else if (DVInsn->getOperand(0).isCImm())
1672 addConstantValue(VariableDie, DVInsn->getOperand(0).getCImm(),
1673 DV->getType().isUnsignedDIType());
1675 DV->setDIE(VariableDie);
1678 // .. else use frame index.
1679 int FI = DV->getFrameIndex();
1681 unsigned FrameReg = 0;
1682 const TargetFrameLowering *TFI = Asm->TM.getFrameLowering();
1684 TFI->getFrameIndexReference(*Asm->MF, FI, FrameReg);
1685 MachineLocation Location(FrameReg, Offset);
1686 addVariableAddress(*DV, VariableDie, Location);
1690 DV->setDIE(VariableDie);
1694 /// createMemberDIE - Create new member DIE.
1695 DIE *CompileUnit::createMemberDIE(DIDerivedType DT) {
1696 DIE *MemberDie = new DIE(DT.getTag());
1697 StringRef Name = DT.getName();
1699 addString(MemberDie, dwarf::DW_AT_name, Name);
1701 addType(MemberDie, DT.getTypeDerivedFrom());
1703 addSourceLine(MemberDie, DT);
1705 DIEBlock *MemLocationDie = new (DIEValueAllocator) DIEBlock();
1706 addUInt(MemLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus_uconst);
1708 uint64_t Size = DT.getSizeInBits();
1709 uint64_t FieldSize = DT.getOriginalTypeSize();
1711 if (Size != FieldSize) {
1713 addUInt(MemberDie, dwarf::DW_AT_byte_size, 0, DT.getOriginalTypeSize()>>3);
1714 addUInt(MemberDie, dwarf::DW_AT_bit_size, 0, DT.getSizeInBits());
1716 uint64_t Offset = DT.getOffsetInBits();
1717 uint64_t AlignMask = ~(DT.getAlignInBits() - 1);
1718 uint64_t HiMark = (Offset + FieldSize) & AlignMask;
1719 uint64_t FieldOffset = (HiMark - FieldSize);
1720 Offset -= FieldOffset;
1722 // Maybe we need to work from the other end.
1723 if (Asm->getDataLayout().isLittleEndian())
1724 Offset = FieldSize - (Offset + Size);
1725 addUInt(MemberDie, dwarf::DW_AT_bit_offset, 0, Offset);
1727 // Here WD_AT_data_member_location points to the anonymous
1728 // field that includes this bit field.
1729 addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, FieldOffset >> 3);
1732 // This is not a bitfield.
1733 addUInt(MemLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits() >> 3);
1735 if (DT.getTag() == dwarf::DW_TAG_inheritance
1736 && DT.isVirtual()) {
1738 // For C++, virtual base classes are not at fixed offset. Use following
1739 // expression to extract appropriate offset from vtable.
1740 // BaseAddr = ObAddr + *((*ObAddr) - Offset)
1742 DIEBlock *VBaseLocationDie = new (DIEValueAllocator) DIEBlock();
1743 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_dup);
1744 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
1745 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_constu);
1746 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_udata, DT.getOffsetInBits());
1747 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_minus);
1748 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_deref);
1749 addUInt(VBaseLocationDie, 0, dwarf::DW_FORM_data1, dwarf::DW_OP_plus);
1751 addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0,
1754 addBlock(MemberDie, dwarf::DW_AT_data_member_location, 0, MemLocationDie);
1756 if (DT.isProtected())
1757 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1758 dwarf::DW_ACCESS_protected);
1759 else if (DT.isPrivate())
1760 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1761 dwarf::DW_ACCESS_private);
1762 // Otherwise C++ member and base classes are considered public.
1764 addUInt(MemberDie, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1765 dwarf::DW_ACCESS_public);
1767 addUInt(MemberDie, dwarf::DW_AT_virtuality, dwarf::DW_FORM_data1,
1768 dwarf::DW_VIRTUALITY_virtual);
1770 // Objective-C properties.
1771 if (MDNode *PNode = DT.getObjCProperty())
1772 if (DIEEntry *PropertyDie = getDIEEntry(PNode))
1773 MemberDie->addValue(dwarf::DW_AT_APPLE_property, dwarf::DW_FORM_ref4,
1776 if (DT.isArtificial())
1777 addFlag(MemberDie, dwarf::DW_AT_artificial);
1782 /// createStaticMemberDIE - Create new DIE for C++ static member.
1783 DIE *CompileUnit::createStaticMemberDIE(const DIDerivedType DT) {
1787 DIE *StaticMemberDIE = new DIE(DT.getTag());
1788 DIType Ty = DT.getTypeDerivedFrom();
1790 addString(StaticMemberDIE, dwarf::DW_AT_name, DT.getName());
1791 addType(StaticMemberDIE, Ty);
1792 addSourceLine(StaticMemberDIE, DT);
1793 addFlag(StaticMemberDIE, dwarf::DW_AT_external);
1794 addFlag(StaticMemberDIE, dwarf::DW_AT_declaration);
1796 // FIXME: We could omit private if the parent is a class_type, and
1797 // public if the parent is something else.
1798 if (DT.isProtected())
1799 addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1800 dwarf::DW_ACCESS_protected);
1801 else if (DT.isPrivate())
1802 addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1803 dwarf::DW_ACCESS_private);
1805 addUInt(StaticMemberDIE, dwarf::DW_AT_accessibility, dwarf::DW_FORM_data1,
1806 dwarf::DW_ACCESS_public);
1808 if (const ConstantInt *CI = dyn_cast_or_null<ConstantInt>(DT.getConstant()))
1809 addConstantValue(StaticMemberDIE, CI, Ty.isUnsignedDIType());
1810 if (const ConstantFP *CFP = dyn_cast_or_null<ConstantFP>(DT.getConstant()))
1811 addConstantFPValue(StaticMemberDIE, CFP);
1813 insertDIE(DT, StaticMemberDIE);
1814 return StaticMemberDIE;