1 //===-- AsmPrinter.cpp - Common AsmPrinter code ---------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the AsmPrinter class.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/CodeGen/AsmPrinter.h"
15 #include "llvm/Assembly/Writer.h"
16 #include "llvm/DerivedTypes.h"
17 #include "llvm/Constants.h"
18 #include "llvm/Module.h"
19 #include "llvm/CodeGen/GCMetadataPrinter.h"
20 #include "llvm/CodeGen/MachineConstantPool.h"
21 #include "llvm/CodeGen/MachineJumpTableInfo.h"
22 #include "llvm/CodeGen/MachineModuleInfo.h"
23 #include "llvm/Support/Mangler.h"
24 #include "llvm/Support/raw_ostream.h"
25 #include "llvm/Target/TargetAsmInfo.h"
26 #include "llvm/Target/TargetData.h"
27 #include "llvm/Target/TargetLowering.h"
28 #include "llvm/Target/TargetMachine.h"
29 #include "llvm/Target/TargetOptions.h"
30 #include "llvm/Target/TargetRegisterInfo.h"
31 #include "llvm/ADT/SmallPtrSet.h"
32 #include "llvm/ADT/SmallString.h"
33 #include "llvm/ADT/StringExtras.h"
37 char AsmPrinter::ID = 0;
38 AsmPrinter::AsmPrinter(raw_ostream &o, TargetMachine &tm,
39 const TargetAsmInfo *T)
40 : MachineFunctionPass(&ID), FunctionNumber(0), O(o),
41 TM(tm), TAI(T), TRI(tm.getRegisterInfo()),
42 IsInTextSection(false)
45 AsmPrinter::~AsmPrinter() {
46 for (gcp_iterator I = GCMetadataPrinters.begin(),
47 E = GCMetadataPrinters.end(); I != E; ++I)
51 /// SwitchToTextSection - Switch to the specified text section of the executable
52 /// if we are not already in it!
54 void AsmPrinter::SwitchToTextSection(const char *NewSection,
55 const GlobalValue *GV) {
57 if (GV && GV->hasSection())
58 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
62 // If we're already in this section, we're done.
63 if (CurrentSection == NS) return;
65 // Close the current section, if applicable.
66 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
67 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
71 if (!CurrentSection.empty())
72 O << CurrentSection << TAI->getTextSectionStartSuffix() << '\n';
74 IsInTextSection = true;
77 /// SwitchToDataSection - Switch to the specified data section of the executable
78 /// if we are not already in it!
80 void AsmPrinter::SwitchToDataSection(const char *NewSection,
81 const GlobalValue *GV) {
83 if (GV && GV->hasSection())
84 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
88 // If we're already in this section, we're done.
89 if (CurrentSection == NS) return;
91 // Close the current section, if applicable.
92 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
93 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
97 if (!CurrentSection.empty())
98 O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
100 IsInTextSection = false;
103 /// SwitchToSection - Switch to the specified section of the executable if we
104 /// are not already in it!
105 void AsmPrinter::SwitchToSection(const Section* NS) {
106 const std::string& NewSection = NS->getName();
108 // If we're already in this section, we're done.
109 if (CurrentSection == NewSection) return;
111 // Close the current section, if applicable.
112 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
113 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
115 // FIXME: Make CurrentSection a Section* in the future
116 CurrentSection = NewSection;
117 CurrentSection_ = NS;
119 if (!CurrentSection.empty()) {
120 // If section is named we need to switch into it via special '.section'
121 // directive and also append funky flags. Otherwise - section name is just
122 // some magic assembler directive.
124 O << TAI->getSwitchToSectionDirective()
126 << TAI->getSectionFlags(NS->getFlags());
129 O << TAI->getDataSectionStartSuffix() << '\n';
132 IsInTextSection = (NS->getFlags() & SectionFlags::Code);
135 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
136 MachineFunctionPass::getAnalysisUsage(AU);
137 AU.addRequired<GCModuleInfo>();
140 bool AsmPrinter::doInitialization(Module &M) {
141 Mang = new Mangler(M, TAI->getGlobalPrefix());
143 GCModuleInfo *MI = getAnalysisToUpdate<GCModuleInfo>();
144 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
145 for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
146 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
147 MP->beginAssembly(O, *this, *TAI);
149 if (!M.getModuleInlineAsm().empty())
150 O << TAI->getCommentString() << " Start of file scope inline assembly\n"
151 << M.getModuleInlineAsm()
152 << '\n' << TAI->getCommentString()
153 << " End of file scope inline assembly\n";
155 SwitchToDataSection(""); // Reset back to no section.
157 MMI = getAnalysisToUpdate<MachineModuleInfo>();
158 if (MMI) MMI->AnalyzeModule(M);
163 bool AsmPrinter::doFinalization(Module &M) {
164 if (TAI->getWeakRefDirective()) {
165 if (!ExtWeakSymbols.empty())
166 SwitchToDataSection("");
168 for (std::set<const GlobalValue*>::iterator i = ExtWeakSymbols.begin(),
169 e = ExtWeakSymbols.end(); i != e; ++i) {
170 const GlobalValue *GV = *i;
171 std::string Name = Mang->getValueName(GV);
172 O << TAI->getWeakRefDirective() << Name << '\n';
176 if (TAI->getSetDirective()) {
177 if (!M.alias_empty())
178 SwitchToSection(TAI->getTextSection());
181 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
183 std::string Name = Mang->getValueName(I);
186 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
187 Target = Mang->getValueName(GV);
189 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
190 O << "\t.globl\t" << Name << '\n';
191 else if (I->hasWeakLinkage())
192 O << TAI->getWeakRefDirective() << Name << '\n';
193 else if (!I->hasInternalLinkage())
194 assert(0 && "Invalid alias linkage");
196 printVisibility(Name, I->getVisibility());
198 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
200 // If the aliasee has external weak linkage it can be referenced only by
201 // alias itself. In this case it can be not in ExtWeakSymbols list. Emit
202 // weak reference in such case.
203 if (GV->hasExternalWeakLinkage()) {
204 if (TAI->getWeakRefDirective())
205 O << TAI->getWeakRefDirective() << Target << '\n';
207 O << "\t.globl\t" << Target << '\n';
212 GCModuleInfo *MI = getAnalysisToUpdate<GCModuleInfo>();
213 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
214 for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
215 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
216 MP->finishAssembly(O, *this, *TAI);
218 // If we don't have any trampolines, then we don't require stack memory
219 // to be executable. Some targets have a directive to declare this.
220 Function* InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
221 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
222 if (TAI->getNonexecutableStackDirective())
223 O << TAI->getNonexecutableStackDirective() << '\n';
225 delete Mang; Mang = 0;
229 std::string AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) {
230 assert(MF && "No machine function?");
231 std::string Name = MF->getFunction()->getName();
233 Name = Mang->getValueName(MF->getFunction());
234 return Mang->makeNameProper(Name + ".eh", TAI->getGlobalPrefix());
237 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
238 // What's my mangled name?
239 CurrentFnName = Mang->getValueName(MF.getFunction());
240 IncrementFunctionNumber();
243 /// EmitConstantPool - Print to the current output stream assembly
244 /// representations of the constants in the constant pool MCP. This is
245 /// used to print out constants which have been "spilled to memory" by
246 /// the code generator.
248 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
249 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
250 if (CP.empty()) return;
252 // Calculate sections for constant pool entries. We collect entries to go into
253 // the same section together to reduce amount of section switch statements.
255 std::multimap<const Section*,
256 std::pair<MachineConstantPoolEntry, unsigned> > CPMap;
258 SmallPtrSet<const Section*, 5> Sections;
260 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
261 MachineConstantPoolEntry CPE = CP[i];
262 const Section* S = TAI->SelectSectionForMachineConst(CPE.getType());
263 CPs.insert(std::make_pair(S, std::make_pair(CPE, i)));
267 // Now print stuff into the calculated sections.
268 for (SmallPtrSet<const Section*, 5>::iterator IS = Sections.begin(),
269 ES = Sections.end(); IS != ES; ++IS) {
270 SwitchToSection(*IS);
271 EmitAlignment(MCP->getConstantPoolAlignment());
273 std::pair<CPMap::iterator, CPMap::iterator> II = CPs.equal_range(*IS);
274 for (CPMap::iterator I = II.first, E = II.second; I != E; ++I) {
275 CPMap::iterator J = next(I);
276 MachineConstantPoolEntry Entry = I->second.first;
277 unsigned index = I->second.second;
279 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
280 << index << ":\t\t\t\t\t";
281 // O << TAI->getCommentString() << ' ' <<
282 // WriteTypeSymbolic(O, CP[i].first.getType(), 0);
284 if (Entry.isMachineConstantPoolEntry())
285 EmitMachineConstantPoolValue(Entry.Val.MachineCPVal);
287 EmitGlobalConstant(Entry.Val.ConstVal);
289 // Emit inter-object padding for alignment.
291 const Type *Ty = Entry.getType();
292 unsigned EntSize = TM.getTargetData()->getABITypeSize(Ty);
293 unsigned ValEnd = Entry.getOffset() + EntSize;
294 EmitZeros(J->second.first.getOffset()-ValEnd);
300 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
301 /// by the current function to the current output stream.
303 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
304 MachineFunction &MF) {
305 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
306 if (JT.empty()) return;
308 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
310 // Pick the directive to use to print the jump table entries, and switch to
311 // the appropriate section.
312 TargetLowering *LoweringInfo = TM.getTargetLowering();
314 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
315 const Function *F = MF.getFunction();
316 unsigned SectionFlags = TAI->SectionFlagsForGlobal(F);
317 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
318 !JumpTableDataSection ||
319 SectionFlags & SectionFlags::Linkonce) {
320 // In PIC mode, we need to emit the jump table to the same section as the
321 // function body itself, otherwise the label differences won't make sense.
322 // We should also do if the section name is NULL or function is declared in
323 // discardable section.
324 SwitchToSection(TAI->SectionForGlobal(F));
326 SwitchToDataSection(JumpTableDataSection);
329 EmitAlignment(Log2_32(MJTI->getAlignment()));
331 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
332 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
334 // If this jump table was deleted, ignore it.
335 if (JTBBs.empty()) continue;
337 // For PIC codegen, if possible we want to use the SetDirective to reduce
338 // the number of relocations the assembler will generate for the jump table.
339 // Set directives are all printed before the jump table itself.
340 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
341 if (TAI->getSetDirective() && IsPic)
342 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
343 if (EmittedSets.insert(JTBBs[ii]))
344 printPICJumpTableSetLabel(i, JTBBs[ii]);
346 // On some targets (e.g. darwin) we want to emit two consequtive labels
347 // before each jump table. The first label is never referenced, but tells
348 // the assembler and linker the extents of the jump table object. The
349 // second label is actually referenced by the code.
350 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
351 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
353 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
354 << '_' << i << ":\n";
356 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
357 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
363 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
364 const MachineBasicBlock *MBB,
365 unsigned uid) const {
366 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
368 // Use JumpTableDirective otherwise honor the entry size from the jump table
370 const char *JTEntryDirective = TAI->getJumpTableDirective();
371 bool HadJTEntryDirective = JTEntryDirective != NULL;
372 if (!HadJTEntryDirective) {
373 JTEntryDirective = MJTI->getEntrySize() == 4 ?
374 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
377 O << JTEntryDirective << ' ';
379 // If we have emitted set directives for the jump table entries, print
380 // them rather than the entries themselves. If we're emitting PIC, then
381 // emit the table entries as differences between two text section labels.
382 // If we're emitting non-PIC code, then emit the entries as direct
383 // references to the target basic blocks.
385 if (TAI->getSetDirective()) {
386 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
387 << '_' << uid << "_set_" << MBB->getNumber();
389 printBasicBlockLabel(MBB, false, false, false);
390 // If the arch uses custom Jump Table directives, don't calc relative to
392 if (!HadJTEntryDirective)
393 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
394 << getFunctionNumber() << '_' << uid;
397 printBasicBlockLabel(MBB, false, false, false);
402 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
403 /// special global used by LLVM. If so, emit it and return true, otherwise
404 /// do nothing and return false.
405 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
406 if (GV->getName() == "llvm.used") {
407 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
408 EmitLLVMUsedList(GV->getInitializer());
412 // Ignore debug and non-emitted data.
413 if (GV->getSection() == "llvm.metadata") return true;
415 if (!GV->hasAppendingLinkage()) return false;
417 assert(GV->hasInitializer() && "Not a special LLVM global!");
419 const TargetData *TD = TM.getTargetData();
420 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
421 if (GV->getName() == "llvm.global_ctors" && GV->use_empty()) {
422 SwitchToDataSection(TAI->getStaticCtorsSection());
423 EmitAlignment(Align, 0);
424 EmitXXStructorList(GV->getInitializer());
428 if (GV->getName() == "llvm.global_dtors" && GV->use_empty()) {
429 SwitchToDataSection(TAI->getStaticDtorsSection());
430 EmitAlignment(Align, 0);
431 EmitXXStructorList(GV->getInitializer());
438 /// findGlobalValue - if CV is an expression equivalent to a single
439 /// global value, return that value.
440 const GlobalValue * AsmPrinter::findGlobalValue(const Constant *CV) {
441 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
443 else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
444 const TargetData *TD = TM.getTargetData();
445 unsigned Opcode = CE->getOpcode();
447 case Instruction::GetElementPtr: {
448 const Constant *ptrVal = CE->getOperand(0);
449 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
450 if (TD->getIndexedOffset(ptrVal->getType(), &idxVec[0], idxVec.size()))
452 return findGlobalValue(ptrVal);
454 case Instruction::BitCast:
455 return findGlobalValue(CE->getOperand(0));
463 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
464 /// global in the specified llvm.used list for which emitUsedDirectiveFor
465 /// is true, as being used with this directive.
467 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
468 const char *Directive = TAI->getUsedDirective();
470 // Should be an array of 'sbyte*'.
471 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
472 if (InitList == 0) return;
474 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
475 const GlobalValue *GV = findGlobalValue(InitList->getOperand(i));
476 if (TAI->emitUsedDirectiveFor(GV, Mang)) {
478 EmitConstantValueOnly(InitList->getOperand(i));
484 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
485 /// function pointers, ignoring the init priority.
486 void AsmPrinter::EmitXXStructorList(Constant *List) {
487 // Should be an array of '{ int, void ()* }' structs. The first value is the
488 // init priority, which we ignore.
489 if (!isa<ConstantArray>(List)) return;
490 ConstantArray *InitList = cast<ConstantArray>(List);
491 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
492 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
493 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
495 if (CS->getOperand(1)->isNullValue())
496 return; // Found a null terminator, exit printing.
497 // Emit the function pointer.
498 EmitGlobalConstant(CS->getOperand(1));
502 /// getGlobalLinkName - Returns the asm/link name of of the specified
503 /// global variable. Should be overridden by each target asm printer to
504 /// generate the appropriate value.
505 const std::string AsmPrinter::getGlobalLinkName(const GlobalVariable *GV) const{
506 std::string LinkName;
508 if (isa<Function>(GV)) {
509 LinkName += TAI->getFunctionAddrPrefix();
510 LinkName += Mang->getValueName(GV);
511 LinkName += TAI->getFunctionAddrSuffix();
513 LinkName += TAI->getGlobalVarAddrPrefix();
514 LinkName += Mang->getValueName(GV);
515 LinkName += TAI->getGlobalVarAddrSuffix();
521 /// EmitExternalGlobal - Emit the external reference to a global variable.
522 /// Should be overridden if an indirect reference should be used.
523 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
524 O << getGlobalLinkName(GV);
529 //===----------------------------------------------------------------------===//
530 /// LEB 128 number encoding.
532 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
533 /// representing an unsigned leb128 value.
534 void AsmPrinter::PrintULEB128(unsigned Value) const {
536 unsigned Byte = Value & 0x7f;
538 if (Value) Byte |= 0x80;
539 O << "0x" << utohexstr(Byte);
540 if (Value) O << ", ";
544 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
545 /// representing a signed leb128 value.
546 void AsmPrinter::PrintSLEB128(int Value) const {
547 int Sign = Value >> (8 * sizeof(Value) - 1);
551 unsigned Byte = Value & 0x7f;
553 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
554 if (IsMore) Byte |= 0x80;
555 O << "0x" << utohexstr(Byte);
556 if (IsMore) O << ", ";
560 //===--------------------------------------------------------------------===//
561 // Emission and print routines
564 /// PrintHex - Print a value as a hexidecimal value.
566 void AsmPrinter::PrintHex(int Value) const {
567 O << "0x" << utohexstr(static_cast<unsigned>(Value));
570 /// EOL - Print a newline character to asm stream. If a comment is present
571 /// then it will be printed first. Comments should not contain '\n'.
572 void AsmPrinter::EOL() const {
576 void AsmPrinter::EOL(const std::string &Comment) const {
577 if (VerboseAsm && !Comment.empty()) {
579 << TAI->getCommentString()
586 void AsmPrinter::EOL(const char* Comment) const {
587 if (VerboseAsm && *Comment) {
589 << TAI->getCommentString()
596 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
597 /// unsigned leb128 value.
598 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
599 if (TAI->hasLEB128()) {
603 O << TAI->getData8bitsDirective();
608 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
609 /// signed leb128 value.
610 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
611 if (TAI->hasLEB128()) {
615 O << TAI->getData8bitsDirective();
620 /// EmitInt8 - Emit a byte directive and value.
622 void AsmPrinter::EmitInt8(int Value) const {
623 O << TAI->getData8bitsDirective();
624 PrintHex(Value & 0xFF);
627 /// EmitInt16 - Emit a short directive and value.
629 void AsmPrinter::EmitInt16(int Value) const {
630 O << TAI->getData16bitsDirective();
631 PrintHex(Value & 0xFFFF);
634 /// EmitInt32 - Emit a long directive and value.
636 void AsmPrinter::EmitInt32(int Value) const {
637 O << TAI->getData32bitsDirective();
641 /// EmitInt64 - Emit a long long directive and value.
643 void AsmPrinter::EmitInt64(uint64_t Value) const {
644 if (TAI->getData64bitsDirective()) {
645 O << TAI->getData64bitsDirective();
648 if (TM.getTargetData()->isBigEndian()) {
649 EmitInt32(unsigned(Value >> 32)); O << '\n';
650 EmitInt32(unsigned(Value));
652 EmitInt32(unsigned(Value)); O << '\n';
653 EmitInt32(unsigned(Value >> 32));
658 /// toOctal - Convert the low order bits of X into an octal digit.
660 static inline char toOctal(int X) {
664 /// printStringChar - Print a char, escaped if necessary.
666 static void printStringChar(raw_ostream &O, char C) {
669 } else if (C == '\\') {
671 } else if (isprint(C)) {
675 case '\b': O << "\\b"; break;
676 case '\f': O << "\\f"; break;
677 case '\n': O << "\\n"; break;
678 case '\r': O << "\\r"; break;
679 case '\t': O << "\\t"; break;
682 O << toOctal(C >> 6);
683 O << toOctal(C >> 3);
684 O << toOctal(C >> 0);
690 /// EmitString - Emit a string with quotes and a null terminator.
691 /// Special characters are emitted properly.
692 /// \literal (Eg. '\t') \endliteral
693 void AsmPrinter::EmitString(const std::string &String) const {
694 const char* AscizDirective = TAI->getAscizDirective();
698 O << TAI->getAsciiDirective();
700 for (unsigned i = 0, N = String.size(); i < N; ++i) {
701 unsigned char C = String[i];
702 printStringChar(O, C);
711 /// EmitFile - Emit a .file directive.
712 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
713 O << "\t.file\t" << Number << " \"";
714 for (unsigned i = 0, N = Name.size(); i < N; ++i) {
715 unsigned char C = Name[i];
716 printStringChar(O, C);
722 //===----------------------------------------------------------------------===//
724 // EmitAlignment - Emit an alignment directive to the specified power of
725 // two boundary. For example, if you pass in 3 here, you will get an 8
726 // byte alignment. If a global value is specified, and if that global has
727 // an explicit alignment requested, it will unconditionally override the
728 // alignment request. However, if ForcedAlignBits is specified, this value
729 // has final say: the ultimate alignment will be the max of ForcedAlignBits
730 // and the alignment computed with NumBits and the global.
734 // if (GV && GV->hasalignment) Align = GV->getalignment();
735 // Align = std::max(Align, ForcedAlignBits);
737 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
738 unsigned ForcedAlignBits,
739 bool UseFillExpr) const {
740 if (GV && GV->getAlignment())
741 NumBits = Log2_32(GV->getAlignment());
742 NumBits = std::max(NumBits, ForcedAlignBits);
744 if (NumBits == 0) return; // No need to emit alignment.
745 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
746 O << TAI->getAlignDirective() << NumBits;
748 unsigned FillValue = TAI->getTextAlignFillValue();
749 UseFillExpr &= IsInTextSection && FillValue;
750 if (UseFillExpr) O << ",0x" << utohexstr(FillValue);
755 /// EmitZeros - Emit a block of zeros.
757 void AsmPrinter::EmitZeros(uint64_t NumZeros) const {
759 if (TAI->getZeroDirective()) {
760 O << TAI->getZeroDirective() << NumZeros;
761 if (TAI->getZeroDirectiveSuffix())
762 O << TAI->getZeroDirectiveSuffix();
765 for (; NumZeros; --NumZeros)
766 O << TAI->getData8bitsDirective() << "0\n";
771 // Print out the specified constant, without a storage class. Only the
772 // constants valid in constant expressions can occur here.
773 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
774 if (CV->isNullValue() || isa<UndefValue>(CV))
776 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
777 O << CI->getZExtValue();
778 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
779 // This is a constant address for a global variable or function. Use the
780 // name of the variable or function as the address value, possibly
781 // decorating it with GlobalVarAddrPrefix/Suffix or
782 // FunctionAddrPrefix/Suffix (these all default to "" )
783 if (isa<Function>(GV)) {
784 O << TAI->getFunctionAddrPrefix()
785 << Mang->getValueName(GV)
786 << TAI->getFunctionAddrSuffix();
788 O << TAI->getGlobalVarAddrPrefix()
789 << Mang->getValueName(GV)
790 << TAI->getGlobalVarAddrSuffix();
792 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
793 const TargetData *TD = TM.getTargetData();
794 unsigned Opcode = CE->getOpcode();
796 case Instruction::GetElementPtr: {
797 // generate a symbolic expression for the byte address
798 const Constant *ptrVal = CE->getOperand(0);
799 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
800 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
804 EmitConstantValueOnly(ptrVal);
806 O << ") + " << Offset;
808 O << ") - " << -Offset;
810 EmitConstantValueOnly(ptrVal);
814 case Instruction::Trunc:
815 case Instruction::ZExt:
816 case Instruction::SExt:
817 case Instruction::FPTrunc:
818 case Instruction::FPExt:
819 case Instruction::UIToFP:
820 case Instruction::SIToFP:
821 case Instruction::FPToUI:
822 case Instruction::FPToSI:
823 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
825 case Instruction::BitCast:
826 return EmitConstantValueOnly(CE->getOperand(0));
828 case Instruction::IntToPtr: {
829 // Handle casts to pointers by changing them into casts to the appropriate
830 // integer type. This promotes constant folding and simplifies this code.
831 Constant *Op = CE->getOperand(0);
832 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
833 return EmitConstantValueOnly(Op);
837 case Instruction::PtrToInt: {
838 // Support only foldable casts to/from pointers that can be eliminated by
839 // changing the pointer to the appropriately sized integer type.
840 Constant *Op = CE->getOperand(0);
841 const Type *Ty = CE->getType();
843 // We can emit the pointer value into this slot if the slot is an
844 // integer slot greater or equal to the size of the pointer.
845 if (TD->getABITypeSize(Ty) >= TD->getABITypeSize(Op->getType()))
846 return EmitConstantValueOnly(Op);
849 EmitConstantValueOnly(Op);
850 APInt ptrMask = APInt::getAllOnesValue(TD->getABITypeSizeInBits(Ty));
853 ptrMask.toStringUnsigned(S);
854 O << ") & " << S.c_str() << ')';
857 case Instruction::Add:
858 case Instruction::Sub:
859 case Instruction::And:
860 case Instruction::Or:
861 case Instruction::Xor:
863 EmitConstantValueOnly(CE->getOperand(0));
866 case Instruction::Add:
869 case Instruction::Sub:
872 case Instruction::And:
875 case Instruction::Or:
878 case Instruction::Xor:
885 EmitConstantValueOnly(CE->getOperand(1));
889 assert(0 && "Unsupported operator!");
892 assert(0 && "Unknown constant value!");
896 /// printAsCString - Print the specified array as a C compatible string, only if
897 /// the predicate isString is true.
899 static void printAsCString(raw_ostream &O, const ConstantArray *CVA,
901 assert(CVA->isString() && "Array is not string compatible!");
904 for (unsigned i = 0; i != LastElt; ++i) {
906 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
907 printStringChar(O, C);
912 /// EmitString - Emit a zero-byte-terminated string constant.
914 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
915 unsigned NumElts = CVA->getNumOperands();
916 if (TAI->getAscizDirective() && NumElts &&
917 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
918 O << TAI->getAscizDirective();
919 printAsCString(O, CVA, NumElts-1);
921 O << TAI->getAsciiDirective();
922 printAsCString(O, CVA, NumElts);
927 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
928 void AsmPrinter::EmitGlobalConstant(const Constant *CV) {
929 const TargetData *TD = TM.getTargetData();
930 unsigned Size = TD->getABITypeSize(CV->getType());
932 if (CV->isNullValue() || isa<UndefValue>(CV)) {
935 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
936 if (CVA->isString()) {
938 } else { // Not a string. Print the values in successive locations
939 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
940 EmitGlobalConstant(CVA->getOperand(i));
943 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
944 // Print the fields in successive locations. Pad to align if needed!
945 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
946 uint64_t sizeSoFar = 0;
947 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
948 const Constant* field = CVS->getOperand(i);
950 // Check if padding is needed and insert one or more 0s.
951 uint64_t fieldSize = TD->getABITypeSize(field->getType());
952 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
953 - cvsLayout->getElementOffset(i)) - fieldSize;
954 sizeSoFar += fieldSize + padSize;
956 // Now print the actual field value.
957 EmitGlobalConstant(field);
959 // Insert padding - this may include padding to increase the size of the
960 // current field up to the ABI size (if the struct is not packed) as well
961 // as padding to ensure that the next field starts at the right offset.
964 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
965 "Layout of constant struct may be incorrect!");
967 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
968 // FP Constants are printed as integer constants to avoid losing
970 if (CFP->getType() == Type::DoubleTy) {
971 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
972 uint64_t i = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
973 if (TAI->getData64bitsDirective())
974 O << TAI->getData64bitsDirective() << i << '\t'
975 << TAI->getCommentString() << " double value: " << Val << '\n';
976 else if (TD->isBigEndian()) {
977 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
978 << '\t' << TAI->getCommentString()
979 << " double most significant word " << Val << '\n';
980 O << TAI->getData32bitsDirective() << unsigned(i)
981 << '\t' << TAI->getCommentString()
982 << " double least significant word " << Val << '\n';
984 O << TAI->getData32bitsDirective() << unsigned(i)
985 << '\t' << TAI->getCommentString()
986 << " double least significant word " << Val << '\n';
987 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
988 << '\t' << TAI->getCommentString()
989 << " double most significant word " << Val << '\n';
992 } else if (CFP->getType() == Type::FloatTy) {
993 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
994 O << TAI->getData32bitsDirective()
995 << CFP->getValueAPF().bitcastToAPInt().getZExtValue()
996 << '\t' << TAI->getCommentString() << " float " << Val << '\n';
998 } else if (CFP->getType() == Type::X86_FP80Ty) {
999 // all long double variants are printed as hex
1000 // api needed to prevent premature destruction
1001 APInt api = CFP->getValueAPF().bitcastToAPInt();
1002 const uint64_t *p = api.getRawData();
1003 // Convert to double so we can print the approximate val as a comment.
1004 APFloat DoubleVal = CFP->getValueAPF();
1006 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
1008 if (TD->isBigEndian()) {
1009 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
1010 << '\t' << TAI->getCommentString()
1011 << " long double most significant halfword of ~"
1012 << DoubleVal.convertToDouble() << '\n';
1013 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
1014 << '\t' << TAI->getCommentString()
1015 << " long double next halfword\n";
1016 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
1017 << '\t' << TAI->getCommentString()
1018 << " long double next halfword\n";
1019 O << TAI->getData16bitsDirective() << uint16_t(p[0])
1020 << '\t' << TAI->getCommentString()
1021 << " long double next halfword\n";
1022 O << TAI->getData16bitsDirective() << uint16_t(p[1])
1023 << '\t' << TAI->getCommentString()
1024 << " long double least significant halfword\n";
1026 O << TAI->getData16bitsDirective() << uint16_t(p[1])
1027 << '\t' << TAI->getCommentString()
1028 << " long double least significant halfword of ~"
1029 << DoubleVal.convertToDouble() << '\n';
1030 O << TAI->getData16bitsDirective() << uint16_t(p[0])
1031 << '\t' << TAI->getCommentString()
1032 << " long double next halfword\n";
1033 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
1034 << '\t' << TAI->getCommentString()
1035 << " long double next halfword\n";
1036 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
1037 << '\t' << TAI->getCommentString()
1038 << " long double next halfword\n";
1039 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
1040 << '\t' << TAI->getCommentString()
1041 << " long double most significant halfword\n";
1043 EmitZeros(Size - TD->getTypeStoreSize(Type::X86_FP80Ty));
1045 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1046 // all long double variants are printed as hex
1047 // api needed to prevent premature destruction
1048 APInt api = CFP->getValueAPF().bitcastToAPInt();
1049 const uint64_t *p = api.getRawData();
1050 if (TD->isBigEndian()) {
1051 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1052 << '\t' << TAI->getCommentString()
1053 << " long double most significant word\n";
1054 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1055 << '\t' << TAI->getCommentString()
1056 << " long double next word\n";
1057 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1058 << '\t' << TAI->getCommentString()
1059 << " long double next word\n";
1060 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1061 << '\t' << TAI->getCommentString()
1062 << " long double least significant word\n";
1064 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1065 << '\t' << TAI->getCommentString()
1066 << " long double least significant word\n";
1067 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1068 << '\t' << TAI->getCommentString()
1069 << " long double next word\n";
1070 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1071 << '\t' << TAI->getCommentString()
1072 << " long double next word\n";
1073 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1074 << '\t' << TAI->getCommentString()
1075 << " long double most significant word\n";
1078 } else assert(0 && "Floating point constant type not handled");
1079 } else if (CV->getType()->isInteger() &&
1080 cast<IntegerType>(CV->getType())->getBitWidth() >= 64) {
1081 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1082 unsigned BitWidth = CI->getBitWidth();
1083 assert(isPowerOf2_32(BitWidth) &&
1084 "Non-power-of-2-sized integers not handled!");
1086 // We don't expect assemblers to support integer data directives
1087 // for more than 64 bits, so we emit the data in at most 64-bit
1088 // quantities at a time.
1089 const uint64_t *RawData = CI->getValue().getRawData();
1090 for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
1092 if (TD->isBigEndian())
1093 Val = RawData[e - i - 1];
1097 if (TAI->getData64bitsDirective())
1098 O << TAI->getData64bitsDirective() << Val << '\n';
1099 else if (TD->isBigEndian()) {
1100 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1101 << '\t' << TAI->getCommentString()
1102 << " Double-word most significant word " << Val << '\n';
1103 O << TAI->getData32bitsDirective() << unsigned(Val)
1104 << '\t' << TAI->getCommentString()
1105 << " Double-word least significant word " << Val << '\n';
1107 O << TAI->getData32bitsDirective() << unsigned(Val)
1108 << '\t' << TAI->getCommentString()
1109 << " Double-word least significant word " << Val << '\n';
1110 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1111 << '\t' << TAI->getCommentString()
1112 << " Double-word most significant word " << Val << '\n';
1117 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1118 const VectorType *PTy = CP->getType();
1120 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
1121 EmitGlobalConstant(CP->getOperand(I));
1126 const Type *type = CV->getType();
1127 printDataDirective(type);
1128 EmitConstantValueOnly(CV);
1129 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1131 CI->getValue().toStringUnsigned(S, 16);
1132 O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
1137 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1138 // Target doesn't support this yet!
1142 /// PrintSpecial - Print information related to the specified machine instr
1143 /// that is independent of the operand, and may be independent of the instr
1144 /// itself. This can be useful for portably encoding the comment character
1145 /// or other bits of target-specific knowledge into the asmstrings. The
1146 /// syntax used is ${:comment}. Targets can override this to add support
1147 /// for their own strange codes.
1148 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) {
1149 if (!strcmp(Code, "private")) {
1150 O << TAI->getPrivateGlobalPrefix();
1151 } else if (!strcmp(Code, "comment")) {
1152 O << TAI->getCommentString();
1153 } else if (!strcmp(Code, "uid")) {
1154 // Assign a unique ID to this machine instruction.
1155 static const MachineInstr *LastMI = 0;
1156 static const Function *F = 0;
1157 static unsigned Counter = 0U-1;
1159 // Comparing the address of MI isn't sufficient, because machineinstrs may
1160 // be allocated to the same address across functions.
1161 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1163 // If this is a new machine instruction, bump the counter.
1164 if (LastMI != MI || F != ThisF) {
1171 cerr << "Unknown special formatter '" << Code
1172 << "' for machine instr: " << *MI;
1178 /// printInlineAsm - This method formats and prints the specified machine
1179 /// instruction that is an inline asm.
1180 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1181 unsigned NumOperands = MI->getNumOperands();
1183 // Count the number of register definitions.
1184 unsigned NumDefs = 0;
1185 for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
1187 assert(NumDefs != NumOperands-1 && "No asm string?");
1189 assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
1191 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1192 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1194 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1195 // These are useful to see where empty asm's wound up.
1196 if (AsmStr[0] == 0) {
1197 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1201 O << TAI->getInlineAsmStart() << "\n\t";
1203 // The variant of the current asmprinter.
1204 int AsmPrinterVariant = TAI->getAssemblerDialect();
1206 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1207 const char *LastEmitted = AsmStr; // One past the last character emitted.
1209 while (*LastEmitted) {
1210 switch (*LastEmitted) {
1212 // Not a special case, emit the string section literally.
1213 const char *LiteralEnd = LastEmitted+1;
1214 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1215 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1217 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1218 O.write(LastEmitted, LiteralEnd-LastEmitted);
1219 LastEmitted = LiteralEnd;
1223 ++LastEmitted; // Consume newline character.
1224 O << '\n'; // Indent code with newline.
1227 ++LastEmitted; // Consume '$' character.
1231 switch (*LastEmitted) {
1232 default: Done = false; break;
1233 case '$': // $$ -> $
1234 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1236 ++LastEmitted; // Consume second '$' character.
1238 case '(': // $( -> same as GCC's { character.
1239 ++LastEmitted; // Consume '(' character.
1240 if (CurVariant != -1) {
1241 cerr << "Nested variants found in inline asm string: '"
1245 CurVariant = 0; // We're in the first variant now.
1248 ++LastEmitted; // consume '|' character.
1249 if (CurVariant == -1)
1250 O << '|'; // this is gcc's behavior for | outside a variant
1252 ++CurVariant; // We're in the next variant.
1254 case ')': // $) -> same as GCC's } char.
1255 ++LastEmitted; // consume ')' character.
1256 if (CurVariant == -1)
1257 O << '}'; // this is gcc's behavior for } outside a variant
1264 bool HasCurlyBraces = false;
1265 if (*LastEmitted == '{') { // ${variable}
1266 ++LastEmitted; // Consume '{' character.
1267 HasCurlyBraces = true;
1270 const char *IDStart = LastEmitted;
1273 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1274 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1275 cerr << "Bad $ operand number in inline asm string: '"
1279 LastEmitted = IDEnd;
1281 char Modifier[2] = { 0, 0 };
1283 if (HasCurlyBraces) {
1284 // If we have curly braces, check for a modifier character. This
1285 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1286 if (*LastEmitted == ':') {
1287 ++LastEmitted; // Consume ':' character.
1288 if (*LastEmitted == 0) {
1289 cerr << "Bad ${:} expression in inline asm string: '"
1294 Modifier[0] = *LastEmitted;
1295 ++LastEmitted; // Consume modifier character.
1298 if (*LastEmitted != '}') {
1299 cerr << "Bad ${} expression in inline asm string: '"
1303 ++LastEmitted; // Consume '}' character.
1306 if ((unsigned)Val >= NumOperands-1) {
1307 cerr << "Invalid $ operand number in inline asm string: '"
1312 // Okay, we finally have a value number. Ask the target to print this
1314 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1319 // Scan to find the machine operand number for the operand.
1320 for (; Val; --Val) {
1321 if (OpNo >= MI->getNumOperands()) break;
1322 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1323 OpNo += (OpFlags >> 3) + 1;
1326 if (OpNo >= MI->getNumOperands()) {
1329 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1330 ++OpNo; // Skip over the ID number.
1332 if (Modifier[0]=='l') // labels are target independent
1333 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1334 false, false, false);
1336 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1337 if ((OpFlags & 7) == 4) {
1338 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1339 Modifier[0] ? Modifier : 0);
1341 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1342 Modifier[0] ? Modifier : 0);
1347 cerr << "Invalid operand found in inline asm: '"
1357 O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1360 /// printImplicitDef - This method prints the specified machine instruction
1361 /// that is an implicit def.
1362 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1363 O << '\t' << TAI->getCommentString() << " implicit-def: "
1364 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1367 /// printLabel - This method prints a local label used by debug and
1368 /// exception handling tables.
1369 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1370 printLabel(MI->getOperand(0).getImm());
1373 void AsmPrinter::printLabel(unsigned Id) const {
1374 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1377 /// printDeclare - This method prints a local variable declaration used by
1379 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1380 /// entry into dwarf table.
1381 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1382 int FI = MI->getOperand(0).getIndex();
1383 GlobalValue *GV = MI->getOperand(1).getGlobal();
1384 MMI->RecordVariable(GV, FI);
1387 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1388 /// instruction, using the specified assembler variant. Targets should
1389 /// overried this to format as appropriate.
1390 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1391 unsigned AsmVariant, const char *ExtraCode) {
1392 // Target doesn't support this yet!
1396 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1397 unsigned AsmVariant,
1398 const char *ExtraCode) {
1399 // Target doesn't support this yet!
1403 /// printBasicBlockLabel - This method prints the label for the specified
1404 /// MachineBasicBlock
1405 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1408 bool printComment) const {
1410 unsigned Align = MBB->getAlignment();
1412 EmitAlignment(Log2_32(Align));
1415 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1416 << MBB->getNumber();
1419 if (printComment && MBB->getBasicBlock())
1420 O << '\t' << TAI->getCommentString() << ' '
1421 << MBB->getBasicBlock()->getNameStart();
1424 /// printPICJumpTableSetLabel - This method prints a set label for the
1425 /// specified MachineBasicBlock for a jumptable entry.
1426 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1427 const MachineBasicBlock *MBB) const {
1428 if (!TAI->getSetDirective())
1431 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1432 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1433 printBasicBlockLabel(MBB, false, false, false);
1434 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1435 << '_' << uid << '\n';
1438 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1439 const MachineBasicBlock *MBB) const {
1440 if (!TAI->getSetDirective())
1443 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1444 << getFunctionNumber() << '_' << uid << '_' << uid2
1445 << "_set_" << MBB->getNumber() << ',';
1446 printBasicBlockLabel(MBB, false, false, false);
1447 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1448 << '_' << uid << '_' << uid2 << '\n';
1451 /// printDataDirective - This method prints the asm directive for the
1453 void AsmPrinter::printDataDirective(const Type *type) {
1454 const TargetData *TD = TM.getTargetData();
1455 switch (type->getTypeID()) {
1456 case Type::IntegerTyID: {
1457 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1459 O << TAI->getData8bitsDirective();
1460 else if (BitWidth <= 16)
1461 O << TAI->getData16bitsDirective();
1462 else if (BitWidth <= 32)
1463 O << TAI->getData32bitsDirective();
1464 else if (BitWidth <= 64) {
1465 assert(TAI->getData64bitsDirective() &&
1466 "Target cannot handle 64-bit constant exprs!");
1467 O << TAI->getData64bitsDirective();
1469 assert(0 && "Target cannot handle given data directive width!");
1473 case Type::PointerTyID:
1474 if (TD->getPointerSize() == 8) {
1475 assert(TAI->getData64bitsDirective() &&
1476 "Target cannot handle 64-bit pointer exprs!");
1477 O << TAI->getData64bitsDirective();
1479 O << TAI->getData32bitsDirective();
1482 case Type::FloatTyID: case Type::DoubleTyID:
1483 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1484 assert (0 && "Should have already output floating point constant.");
1486 assert (0 && "Can't handle printing this type of thing");
1491 void AsmPrinter::printSuffixedName(const char *Name, const char *Suffix,
1492 const char *Prefix) {
1495 O << TAI->getPrivateGlobalPrefix();
1496 if (Prefix) O << Prefix;
1508 void AsmPrinter::printSuffixedName(const std::string &Name, const char* Suffix) {
1509 printSuffixedName(Name.c_str(), Suffix);
1512 void AsmPrinter::printVisibility(const std::string& Name,
1513 unsigned Visibility) const {
1514 if (Visibility == GlobalValue::HiddenVisibility) {
1515 if (const char *Directive = TAI->getHiddenDirective())
1516 O << Directive << Name << '\n';
1517 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1518 if (const char *Directive = TAI->getProtectedDirective())
1519 O << Directive << Name << '\n';
1523 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
1524 if (!S->usesMetadata())
1527 gcp_iterator GCPI = GCMetadataPrinters.find(S);
1528 if (GCPI != GCMetadataPrinters.end())
1529 return GCPI->second;
1531 const char *Name = S->getName().c_str();
1533 for (GCMetadataPrinterRegistry::iterator
1534 I = GCMetadataPrinterRegistry::begin(),
1535 E = GCMetadataPrinterRegistry::end(); I != E; ++I)
1536 if (strcmp(Name, I->getName()) == 0) {
1537 GCMetadataPrinter *GMP = I->instantiate();
1539 GCMetadataPrinters.insert(std::make_pair(S, GMP));
1543 cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";