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/DenseSet.h"
32 #include "llvm/ADT/SmallPtrSet.h"
33 #include "llvm/ADT/SmallString.h"
34 #include "llvm/ADT/StringExtras.h"
38 char AsmPrinter::ID = 0;
39 AsmPrinter::AsmPrinter(raw_ostream &o, TargetMachine &tm,
40 const TargetAsmInfo *T)
41 : MachineFunctionPass(&ID), FunctionNumber(0), O(o),
42 TM(tm), TAI(T), TRI(tm.getRegisterInfo()),
43 IsInTextSection(false)
46 AsmPrinter::~AsmPrinter() {
47 for (gcp_iterator I = GCMetadataPrinters.begin(),
48 E = GCMetadataPrinters.end(); I != E; ++I)
52 /// SwitchToTextSection - Switch to the specified text section of the executable
53 /// if we are not already in it!
55 void AsmPrinter::SwitchToTextSection(const char *NewSection,
56 const GlobalValue *GV) {
58 if (GV && GV->hasSection())
59 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
63 // If we're already in this section, we're done.
64 if (CurrentSection == NS) return;
66 // Close the current section, if applicable.
67 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
68 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
72 if (!CurrentSection.empty())
73 O << CurrentSection << TAI->getTextSectionStartSuffix() << '\n';
75 IsInTextSection = true;
78 /// SwitchToDataSection - Switch to the specified data section of the executable
79 /// if we are not already in it!
81 void AsmPrinter::SwitchToDataSection(const char *NewSection,
82 const GlobalValue *GV) {
84 if (GV && GV->hasSection())
85 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
89 // If we're already in this section, we're done.
90 if (CurrentSection == NS) return;
92 // Close the current section, if applicable.
93 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
94 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
98 if (!CurrentSection.empty())
99 O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
101 IsInTextSection = false;
104 /// SwitchToSection - Switch to the specified section of the executable if we
105 /// are not already in it!
106 void AsmPrinter::SwitchToSection(const Section* NS) {
107 const std::string& NewSection = NS->getName();
109 // If we're already in this section, we're done.
110 if (CurrentSection == NewSection) return;
112 // Close the current section, if applicable.
113 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
114 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
116 // FIXME: Make CurrentSection a Section* in the future
117 CurrentSection = NewSection;
118 CurrentSection_ = NS;
120 if (!CurrentSection.empty()) {
121 // If section is named we need to switch into it via special '.section'
122 // directive and also append funky flags. Otherwise - section name is just
123 // some magic assembler directive.
125 O << TAI->getSwitchToSectionDirective()
127 << TAI->getSectionFlags(NS->getFlags());
130 O << TAI->getDataSectionStartSuffix() << '\n';
133 IsInTextSection = (NS->getFlags() & SectionFlags::Code);
136 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
137 MachineFunctionPass::getAnalysisUsage(AU);
138 AU.addRequired<GCModuleInfo>();
141 bool AsmPrinter::doInitialization(Module &M) {
142 Mang = new Mangler(M, TAI->getGlobalPrefix());
144 GCModuleInfo *MI = getAnalysisToUpdate<GCModuleInfo>();
145 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
146 for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
147 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
148 MP->beginAssembly(O, *this, *TAI);
150 if (!M.getModuleInlineAsm().empty())
151 O << TAI->getCommentString() << " Start of file scope inline assembly\n"
152 << M.getModuleInlineAsm()
153 << '\n' << TAI->getCommentString()
154 << " End of file scope inline assembly\n";
156 SwitchToDataSection(""); // Reset back to no section.
158 MMI = getAnalysisToUpdate<MachineModuleInfo>();
159 if (MMI) MMI->AnalyzeModule(M);
164 bool AsmPrinter::doFinalization(Module &M) {
165 if (TAI->getWeakRefDirective()) {
166 if (!ExtWeakSymbols.empty())
167 SwitchToDataSection("");
169 for (std::set<const GlobalValue*>::iterator i = ExtWeakSymbols.begin(),
170 e = ExtWeakSymbols.end(); i != e; ++i) {
171 const GlobalValue *GV = *i;
172 std::string Name = Mang->getValueName(GV);
173 O << TAI->getWeakRefDirective() << Name << '\n';
177 if (TAI->getSetDirective()) {
178 if (!M.alias_empty())
179 SwitchToSection(TAI->getTextSection());
182 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
184 std::string Name = Mang->getValueName(I);
187 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
188 Target = Mang->getValueName(GV);
190 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
191 O << "\t.globl\t" << Name << '\n';
192 else if (I->hasWeakLinkage())
193 O << TAI->getWeakRefDirective() << Name << '\n';
194 else if (!I->hasInternalLinkage())
195 assert(0 && "Invalid alias linkage");
197 if (I->hasHiddenVisibility()) {
198 if (const char *Directive = TAI->getHiddenDirective())
199 O << Directive << Name << '\n';
200 } else if (I->hasProtectedVisibility()) {
201 if (const char *Directive = TAI->getProtectedDirective())
202 O << Directive << Name << '\n';
205 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
207 // If the aliasee has external weak linkage it can be referenced only by
208 // alias itself. In this case it can be not in ExtWeakSymbols list. Emit
209 // weak reference in such case.
210 if (GV->hasExternalWeakLinkage()) {
211 if (TAI->getWeakRefDirective())
212 O << TAI->getWeakRefDirective() << Target << '\n';
214 O << "\t.globl\t" << Target << '\n';
219 GCModuleInfo *MI = getAnalysisToUpdate<GCModuleInfo>();
220 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
221 for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
222 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
223 MP->finishAssembly(O, *this, *TAI);
225 // If we don't have any trampolines, then we don't require stack memory
226 // to be executable. Some targets have a directive to declare this.
227 Function* InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
228 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
229 if (TAI->getNonexecutableStackDirective())
230 O << TAI->getNonexecutableStackDirective() << '\n';
232 delete Mang; Mang = 0;
236 std::string AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) {
237 assert(MF && "No machine function?");
238 std::string Name = MF->getFunction()->getName();
240 Name = Mang->getValueName(MF->getFunction());
241 return Mang->makeNameProper(Name + ".eh", TAI->getGlobalPrefix());
244 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
245 // What's my mangled name?
246 CurrentFnName = Mang->getValueName(MF.getFunction());
247 IncrementFunctionNumber();
250 /// EmitConstantPool - Print to the current output stream assembly
251 /// representations of the constants in the constant pool MCP. This is
252 /// used to print out constants which have been "spilled to memory" by
253 /// the code generator.
255 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
256 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
257 if (CP.empty()) return;
259 // Calculate sections for constant pool entries. We collect entries to go into
260 // the same section together to reduce amount of section switch statements.
262 std::multimap<const Section*,
263 std::pair<MachineConstantPoolEntry, unsigned> > CPMap;
265 DenseSet<const Section*> Sections;
267 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
268 MachineConstantPoolEntry CPE = CP[i];
269 const Section* S = TAI->SelectSectionForMachineConst(CPE.getType());
270 CPs.insert(std::make_pair(S, std::make_pair(CPE, i)));
274 // Now print stuff into the calculated sections.
275 for (DenseSet<const Section*>::iterator IS = Sections.begin(),
276 ES = Sections.end(); IS != ES; ++IS) {
277 SwitchToSection(*IS);
278 EmitAlignment(MCP->getConstantPoolAlignment());
280 std::pair<CPMap::iterator, CPMap::iterator> II = CPs.equal_range(*IS);
281 for (CPMap::iterator I = II.first, E = II.second; I != E; ++I) {
282 CPMap::iterator J = next(I);
283 MachineConstantPoolEntry Entry = I->second.first;
284 unsigned index = I->second.second;
286 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
287 << index << ":\t\t\t\t\t";
288 // O << TAI->getCommentString() << ' ' <<
289 // WriteTypeSymbolic(O, CP[i].first.getType(), 0);
291 if (Entry.isMachineConstantPoolEntry())
292 EmitMachineConstantPoolValue(Entry.Val.MachineCPVal);
294 EmitGlobalConstant(Entry.Val.ConstVal);
296 // Emit inter-object padding for alignment.
298 const Type *Ty = Entry.getType();
299 unsigned EntSize = TM.getTargetData()->getABITypeSize(Ty);
300 unsigned ValEnd = Entry.getOffset() + EntSize;
301 EmitZeros(J->second.first.getOffset()-ValEnd);
307 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
308 /// by the current function to the current output stream.
310 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
311 MachineFunction &MF) {
312 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
313 if (JT.empty()) return;
315 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
317 // Pick the directive to use to print the jump table entries, and switch to
318 // the appropriate section.
319 TargetLowering *LoweringInfo = TM.getTargetLowering();
321 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
322 const Function *F = MF.getFunction();
323 unsigned SectionFlags = TAI->SectionFlagsForGlobal(F);
324 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
325 !JumpTableDataSection ||
326 SectionFlags & SectionFlags::Linkonce) {
327 // In PIC mode, we need to emit the jump table to the same section as the
328 // function body itself, otherwise the label differences won't make sense.
329 // We should also do if the section name is NULL or function is declared in
330 // discardable section.
331 SwitchToSection(TAI->SectionForGlobal(F));
333 SwitchToDataSection(JumpTableDataSection);
336 EmitAlignment(Log2_32(MJTI->getAlignment()));
338 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
339 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
341 // If this jump table was deleted, ignore it.
342 if (JTBBs.empty()) continue;
344 // For PIC codegen, if possible we want to use the SetDirective to reduce
345 // the number of relocations the assembler will generate for the jump table.
346 // Set directives are all printed before the jump table itself.
347 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
348 if (TAI->getSetDirective() && IsPic)
349 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
350 if (EmittedSets.insert(JTBBs[ii]))
351 printPICJumpTableSetLabel(i, JTBBs[ii]);
353 // On some targets (e.g. darwin) we want to emit two consequtive labels
354 // before each jump table. The first label is never referenced, but tells
355 // the assembler and linker the extents of the jump table object. The
356 // second label is actually referenced by the code.
357 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
358 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
360 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
361 << '_' << i << ":\n";
363 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
364 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
370 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
371 const MachineBasicBlock *MBB,
372 unsigned uid) const {
373 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
375 // Use JumpTableDirective otherwise honor the entry size from the jump table
377 const char *JTEntryDirective = TAI->getJumpTableDirective();
378 bool HadJTEntryDirective = JTEntryDirective != NULL;
379 if (!HadJTEntryDirective) {
380 JTEntryDirective = MJTI->getEntrySize() == 4 ?
381 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
384 O << JTEntryDirective << ' ';
386 // If we have emitted set directives for the jump table entries, print
387 // them rather than the entries themselves. If we're emitting PIC, then
388 // emit the table entries as differences between two text section labels.
389 // If we're emitting non-PIC code, then emit the entries as direct
390 // references to the target basic blocks.
392 if (TAI->getSetDirective()) {
393 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
394 << '_' << uid << "_set_" << MBB->getNumber();
396 printBasicBlockLabel(MBB, false, false, false);
397 // If the arch uses custom Jump Table directives, don't calc relative to
399 if (!HadJTEntryDirective)
400 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
401 << getFunctionNumber() << '_' << uid;
404 printBasicBlockLabel(MBB, false, false, false);
409 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
410 /// special global used by LLVM. If so, emit it and return true, otherwise
411 /// do nothing and return false.
412 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
413 if (GV->getName() == "llvm.used") {
414 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
415 EmitLLVMUsedList(GV->getInitializer());
419 // Ignore debug and non-emitted data.
420 if (GV->getSection() == "llvm.metadata") return true;
422 if (!GV->hasAppendingLinkage()) return false;
424 assert(GV->hasInitializer() && "Not a special LLVM global!");
426 const TargetData *TD = TM.getTargetData();
427 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
428 if (GV->getName() == "llvm.global_ctors" && GV->use_empty()) {
429 SwitchToDataSection(TAI->getStaticCtorsSection());
430 EmitAlignment(Align, 0);
431 EmitXXStructorList(GV->getInitializer());
435 if (GV->getName() == "llvm.global_dtors" && GV->use_empty()) {
436 SwitchToDataSection(TAI->getStaticDtorsSection());
437 EmitAlignment(Align, 0);
438 EmitXXStructorList(GV->getInitializer());
445 /// findGlobalValue - if CV is an expression equivalent to a single
446 /// global value, return that value.
447 const GlobalValue * AsmPrinter::findGlobalValue(const Constant *CV) {
448 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
450 else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
451 const TargetData *TD = TM.getTargetData();
452 unsigned Opcode = CE->getOpcode();
454 case Instruction::GetElementPtr: {
455 const Constant *ptrVal = CE->getOperand(0);
456 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
457 if (TD->getIndexedOffset(ptrVal->getType(), &idxVec[0], idxVec.size()))
459 return findGlobalValue(ptrVal);
461 case Instruction::BitCast:
462 return findGlobalValue(CE->getOperand(0));
470 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
471 /// global in the specified llvm.used list for which emitUsedDirectiveFor
472 /// is true, as being used with this directive.
474 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
475 const char *Directive = TAI->getUsedDirective();
477 // Should be an array of 'sbyte*'.
478 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
479 if (InitList == 0) return;
481 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
482 const GlobalValue *GV = findGlobalValue(InitList->getOperand(i));
483 if (TAI->emitUsedDirectiveFor(GV, Mang)) {
485 EmitConstantValueOnly(InitList->getOperand(i));
491 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
492 /// function pointers, ignoring the init priority.
493 void AsmPrinter::EmitXXStructorList(Constant *List) {
494 // Should be an array of '{ int, void ()* }' structs. The first value is the
495 // init priority, which we ignore.
496 if (!isa<ConstantArray>(List)) return;
497 ConstantArray *InitList = cast<ConstantArray>(List);
498 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
499 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
500 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
502 if (CS->getOperand(1)->isNullValue())
503 return; // Found a null terminator, exit printing.
504 // Emit the function pointer.
505 EmitGlobalConstant(CS->getOperand(1));
509 /// getGlobalLinkName - Returns the asm/link name of of the specified
510 /// global variable. Should be overridden by each target asm printer to
511 /// generate the appropriate value.
512 const std::string AsmPrinter::getGlobalLinkName(const GlobalVariable *GV) const{
513 std::string LinkName;
515 if (isa<Function>(GV)) {
516 LinkName += TAI->getFunctionAddrPrefix();
517 LinkName += Mang->getValueName(GV);
518 LinkName += TAI->getFunctionAddrSuffix();
520 LinkName += TAI->getGlobalVarAddrPrefix();
521 LinkName += Mang->getValueName(GV);
522 LinkName += TAI->getGlobalVarAddrSuffix();
528 /// EmitExternalGlobal - Emit the external reference to a global variable.
529 /// Should be overridden if an indirect reference should be used.
530 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
531 O << getGlobalLinkName(GV);
536 //===----------------------------------------------------------------------===//
537 /// LEB 128 number encoding.
539 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
540 /// representing an unsigned leb128 value.
541 void AsmPrinter::PrintULEB128(unsigned Value) const {
543 unsigned Byte = Value & 0x7f;
545 if (Value) Byte |= 0x80;
546 O << "0x" << utohexstr(Byte);
547 if (Value) O << ", ";
551 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
552 /// representing a signed leb128 value.
553 void AsmPrinter::PrintSLEB128(int Value) const {
554 int Sign = Value >> (8 * sizeof(Value) - 1);
558 unsigned Byte = Value & 0x7f;
560 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
561 if (IsMore) Byte |= 0x80;
562 O << "0x" << utohexstr(Byte);
563 if (IsMore) O << ", ";
567 //===--------------------------------------------------------------------===//
568 // Emission and print routines
571 /// PrintHex - Print a value as a hexidecimal value.
573 void AsmPrinter::PrintHex(int Value) const {
574 O << "0x" << utohexstr(static_cast<unsigned>(Value));
577 /// EOL - Print a newline character to asm stream. If a comment is present
578 /// then it will be printed first. Comments should not contain '\n'.
579 void AsmPrinter::EOL() const {
583 void AsmPrinter::EOL(const std::string &Comment) const {
584 if (VerboseAsm && !Comment.empty()) {
586 << TAI->getCommentString()
593 void AsmPrinter::EOL(const char* Comment) const {
594 if (VerboseAsm && *Comment) {
596 << TAI->getCommentString()
603 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
604 /// unsigned leb128 value.
605 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
606 if (TAI->hasLEB128()) {
610 O << TAI->getData8bitsDirective();
615 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
616 /// signed leb128 value.
617 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
618 if (TAI->hasLEB128()) {
622 O << TAI->getData8bitsDirective();
627 /// EmitInt8 - Emit a byte directive and value.
629 void AsmPrinter::EmitInt8(int Value) const {
630 O << TAI->getData8bitsDirective();
631 PrintHex(Value & 0xFF);
634 /// EmitInt16 - Emit a short directive and value.
636 void AsmPrinter::EmitInt16(int Value) const {
637 O << TAI->getData16bitsDirective();
638 PrintHex(Value & 0xFFFF);
641 /// EmitInt32 - Emit a long directive and value.
643 void AsmPrinter::EmitInt32(int Value) const {
644 O << TAI->getData32bitsDirective();
648 /// EmitInt64 - Emit a long long directive and value.
650 void AsmPrinter::EmitInt64(uint64_t Value) const {
651 if (TAI->getData64bitsDirective()) {
652 O << TAI->getData64bitsDirective();
655 if (TM.getTargetData()->isBigEndian()) {
656 EmitInt32(unsigned(Value >> 32)); O << '\n';
657 EmitInt32(unsigned(Value));
659 EmitInt32(unsigned(Value)); O << '\n';
660 EmitInt32(unsigned(Value >> 32));
665 /// toOctal - Convert the low order bits of X into an octal digit.
667 static inline char toOctal(int X) {
671 /// printStringChar - Print a char, escaped if necessary.
673 static void printStringChar(raw_ostream &O, char C) {
676 } else if (C == '\\') {
678 } else if (isprint(C)) {
682 case '\b': O << "\\b"; break;
683 case '\f': O << "\\f"; break;
684 case '\n': O << "\\n"; break;
685 case '\r': O << "\\r"; break;
686 case '\t': O << "\\t"; break;
689 O << toOctal(C >> 6);
690 O << toOctal(C >> 3);
691 O << toOctal(C >> 0);
697 /// EmitString - Emit a string with quotes and a null terminator.
698 /// Special characters are emitted properly.
699 /// \literal (Eg. '\t') \endliteral
700 void AsmPrinter::EmitString(const std::string &String) const {
701 const char* AscizDirective = TAI->getAscizDirective();
705 O << TAI->getAsciiDirective();
707 for (unsigned i = 0, N = String.size(); i < N; ++i) {
708 unsigned char C = String[i];
709 printStringChar(O, C);
718 /// EmitFile - Emit a .file directive.
719 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
720 O << "\t.file\t" << Number << " \"";
721 for (unsigned i = 0, N = Name.size(); i < N; ++i) {
722 unsigned char C = Name[i];
723 printStringChar(O, C);
729 //===----------------------------------------------------------------------===//
731 // EmitAlignment - Emit an alignment directive to the specified power of
732 // two boundary. For example, if you pass in 3 here, you will get an 8
733 // byte alignment. If a global value is specified, and if that global has
734 // an explicit alignment requested, it will unconditionally override the
735 // alignment request. However, if ForcedAlignBits is specified, this value
736 // has final say: the ultimate alignment will be the max of ForcedAlignBits
737 // and the alignment computed with NumBits and the global.
741 // if (GV && GV->hasalignment) Align = GV->getalignment();
742 // Align = std::max(Align, ForcedAlignBits);
744 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
745 unsigned ForcedAlignBits,
746 bool UseFillExpr) const {
747 if (GV && GV->getAlignment())
748 NumBits = Log2_32(GV->getAlignment());
749 NumBits = std::max(NumBits, ForcedAlignBits);
751 if (NumBits == 0) return; // No need to emit alignment.
752 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
753 O << TAI->getAlignDirective() << NumBits;
755 unsigned FillValue = TAI->getTextAlignFillValue();
756 UseFillExpr &= IsInTextSection && FillValue;
757 if (UseFillExpr) O << ",0x" << utohexstr(FillValue);
762 /// EmitZeros - Emit a block of zeros.
764 void AsmPrinter::EmitZeros(uint64_t NumZeros) const {
766 if (TAI->getZeroDirective()) {
767 O << TAI->getZeroDirective() << NumZeros;
768 if (TAI->getZeroDirectiveSuffix())
769 O << TAI->getZeroDirectiveSuffix();
772 for (; NumZeros; --NumZeros)
773 O << TAI->getData8bitsDirective() << "0\n";
778 // Print out the specified constant, without a storage class. Only the
779 // constants valid in constant expressions can occur here.
780 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
781 if (CV->isNullValue() || isa<UndefValue>(CV))
783 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
784 O << CI->getZExtValue();
785 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
786 // This is a constant address for a global variable or function. Use the
787 // name of the variable or function as the address value, possibly
788 // decorating it with GlobalVarAddrPrefix/Suffix or
789 // FunctionAddrPrefix/Suffix (these all default to "" )
790 if (isa<Function>(GV)) {
791 O << TAI->getFunctionAddrPrefix()
792 << Mang->getValueName(GV)
793 << TAI->getFunctionAddrSuffix();
795 O << TAI->getGlobalVarAddrPrefix()
796 << Mang->getValueName(GV)
797 << TAI->getGlobalVarAddrSuffix();
799 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
800 const TargetData *TD = TM.getTargetData();
801 unsigned Opcode = CE->getOpcode();
803 case Instruction::GetElementPtr: {
804 // generate a symbolic expression for the byte address
805 const Constant *ptrVal = CE->getOperand(0);
806 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
807 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
811 EmitConstantValueOnly(ptrVal);
813 O << ") + " << Offset;
815 O << ") - " << -Offset;
817 EmitConstantValueOnly(ptrVal);
821 case Instruction::Trunc:
822 case Instruction::ZExt:
823 case Instruction::SExt:
824 case Instruction::FPTrunc:
825 case Instruction::FPExt:
826 case Instruction::UIToFP:
827 case Instruction::SIToFP:
828 case Instruction::FPToUI:
829 case Instruction::FPToSI:
830 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
832 case Instruction::BitCast:
833 return EmitConstantValueOnly(CE->getOperand(0));
835 case Instruction::IntToPtr: {
836 // Handle casts to pointers by changing them into casts to the appropriate
837 // integer type. This promotes constant folding and simplifies this code.
838 Constant *Op = CE->getOperand(0);
839 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
840 return EmitConstantValueOnly(Op);
844 case Instruction::PtrToInt: {
845 // Support only foldable casts to/from pointers that can be eliminated by
846 // changing the pointer to the appropriately sized integer type.
847 Constant *Op = CE->getOperand(0);
848 const Type *Ty = CE->getType();
850 // We can emit the pointer value into this slot if the slot is an
851 // integer slot greater or equal to the size of the pointer.
852 if (TD->getABITypeSize(Ty) >= TD->getABITypeSize(Op->getType()))
853 return EmitConstantValueOnly(Op);
856 EmitConstantValueOnly(Op);
857 APInt ptrMask = APInt::getAllOnesValue(TD->getABITypeSizeInBits(Ty));
860 ptrMask.toStringUnsigned(S);
861 O << ") & " << S.c_str() << ')';
864 case Instruction::Add:
865 case Instruction::Sub:
866 case Instruction::And:
867 case Instruction::Or:
868 case Instruction::Xor:
870 EmitConstantValueOnly(CE->getOperand(0));
873 case Instruction::Add:
876 case Instruction::Sub:
879 case Instruction::And:
882 case Instruction::Or:
885 case Instruction::Xor:
892 EmitConstantValueOnly(CE->getOperand(1));
896 assert(0 && "Unsupported operator!");
899 assert(0 && "Unknown constant value!");
903 /// printAsCString - Print the specified array as a C compatible string, only if
904 /// the predicate isString is true.
906 static void printAsCString(raw_ostream &O, const ConstantArray *CVA,
908 assert(CVA->isString() && "Array is not string compatible!");
911 for (unsigned i = 0; i != LastElt; ++i) {
913 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
914 printStringChar(O, C);
919 /// EmitString - Emit a zero-byte-terminated string constant.
921 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
922 unsigned NumElts = CVA->getNumOperands();
923 if (TAI->getAscizDirective() && NumElts &&
924 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
925 O << TAI->getAscizDirective();
926 printAsCString(O, CVA, NumElts-1);
928 O << TAI->getAsciiDirective();
929 printAsCString(O, CVA, NumElts);
934 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
935 void AsmPrinter::EmitGlobalConstant(const Constant *CV) {
936 const TargetData *TD = TM.getTargetData();
937 unsigned Size = TD->getABITypeSize(CV->getType());
939 if (CV->isNullValue() || isa<UndefValue>(CV)) {
942 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
943 if (CVA->isString()) {
945 } else { // Not a string. Print the values in successive locations
946 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
947 EmitGlobalConstant(CVA->getOperand(i));
950 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
951 // Print the fields in successive locations. Pad to align if needed!
952 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
953 uint64_t sizeSoFar = 0;
954 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
955 const Constant* field = CVS->getOperand(i);
957 // Check if padding is needed and insert one or more 0s.
958 uint64_t fieldSize = TD->getABITypeSize(field->getType());
959 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
960 - cvsLayout->getElementOffset(i)) - fieldSize;
961 sizeSoFar += fieldSize + padSize;
963 // Now print the actual field value.
964 EmitGlobalConstant(field);
966 // Insert padding - this may include padding to increase the size of the
967 // current field up to the ABI size (if the struct is not packed) as well
968 // as padding to ensure that the next field starts at the right offset.
971 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
972 "Layout of constant struct may be incorrect!");
974 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
975 // FP Constants are printed as integer constants to avoid losing
977 if (CFP->getType() == Type::DoubleTy) {
978 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
979 uint64_t i = CFP->getValueAPF().convertToAPInt().getZExtValue();
980 if (TAI->getData64bitsDirective())
981 O << TAI->getData64bitsDirective() << i << '\t'
982 << TAI->getCommentString() << " double value: " << Val << '\n';
983 else if (TD->isBigEndian()) {
984 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
985 << '\t' << TAI->getCommentString()
986 << " double most significant word " << Val << '\n';
987 O << TAI->getData32bitsDirective() << unsigned(i)
988 << '\t' << TAI->getCommentString()
989 << " double least significant word " << Val << '\n';
991 O << TAI->getData32bitsDirective() << unsigned(i)
992 << '\t' << TAI->getCommentString()
993 << " double least significant word " << Val << '\n';
994 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
995 << '\t' << TAI->getCommentString()
996 << " double most significant word " << Val << '\n';
999 } else if (CFP->getType() == Type::FloatTy) {
1000 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
1001 O << TAI->getData32bitsDirective()
1002 << CFP->getValueAPF().convertToAPInt().getZExtValue()
1003 << '\t' << TAI->getCommentString() << " float " << Val << '\n';
1005 } else if (CFP->getType() == Type::X86_FP80Ty) {
1006 // all long double variants are printed as hex
1007 // api needed to prevent premature destruction
1008 APInt api = CFP->getValueAPF().convertToAPInt();
1009 const uint64_t *p = api.getRawData();
1010 APFloat DoubleVal = CFP->getValueAPF();
1011 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven);
1012 if (TD->isBigEndian()) {
1013 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
1014 << '\t' << TAI->getCommentString()
1015 << " long double most significant halfword of ~"
1016 << DoubleVal.convertToDouble() << '\n';
1017 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
1018 << '\t' << TAI->getCommentString()
1019 << " long double next halfword\n";
1020 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
1021 << '\t' << TAI->getCommentString()
1022 << " long double next halfword\n";
1023 O << TAI->getData16bitsDirective() << uint16_t(p[0])
1024 << '\t' << TAI->getCommentString()
1025 << " long double next halfword\n";
1026 O << TAI->getData16bitsDirective() << uint16_t(p[1])
1027 << '\t' << TAI->getCommentString()
1028 << " long double least significant halfword\n";
1030 O << TAI->getData16bitsDirective() << uint16_t(p[1])
1031 << '\t' << TAI->getCommentString()
1032 << " long double least significant halfword of ~"
1033 << DoubleVal.convertToDouble() << '\n';
1034 O << TAI->getData16bitsDirective() << uint16_t(p[0])
1035 << '\t' << TAI->getCommentString()
1036 << " long double next halfword\n";
1037 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
1038 << '\t' << TAI->getCommentString()
1039 << " long double next halfword\n";
1040 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
1041 << '\t' << TAI->getCommentString()
1042 << " long double next halfword\n";
1043 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
1044 << '\t' << TAI->getCommentString()
1045 << " long double most significant halfword\n";
1047 EmitZeros(Size - TD->getTypeStoreSize(Type::X86_FP80Ty));
1049 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1050 // all long double variants are printed as hex
1051 // api needed to prevent premature destruction
1052 APInt api = CFP->getValueAPF().convertToAPInt();
1053 const uint64_t *p = api.getRawData();
1054 if (TD->isBigEndian()) {
1055 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1056 << '\t' << TAI->getCommentString()
1057 << " long double most significant word\n";
1058 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1059 << '\t' << TAI->getCommentString()
1060 << " long double next word\n";
1061 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1062 << '\t' << TAI->getCommentString()
1063 << " long double next word\n";
1064 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1065 << '\t' << TAI->getCommentString()
1066 << " long double least significant word\n";
1068 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1069 << '\t' << TAI->getCommentString()
1070 << " long double least significant word\n";
1071 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1072 << '\t' << TAI->getCommentString()
1073 << " long double next word\n";
1074 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1075 << '\t' << TAI->getCommentString()
1076 << " long double next word\n";
1077 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1078 << '\t' << TAI->getCommentString()
1079 << " long double most significant word\n";
1082 } else assert(0 && "Floating point constant type not handled");
1083 } else if (CV->getType()->isInteger() &&
1084 cast<IntegerType>(CV->getType())->getBitWidth() >= 64) {
1085 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1086 unsigned BitWidth = CI->getBitWidth();
1087 assert(isPowerOf2_32(BitWidth) &&
1088 "Non-power-of-2-sized integers not handled!");
1090 // We don't expect assemblers to support integer data directives
1091 // for more than 64 bits, so we emit the data in at most 64-bit
1092 // quantities at a time.
1093 const uint64_t *RawData = CI->getValue().getRawData();
1094 for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
1096 if (TD->isBigEndian())
1097 Val = RawData[e - i - 1];
1101 if (TAI->getData64bitsDirective())
1102 O << TAI->getData64bitsDirective() << Val << '\n';
1103 else if (TD->isBigEndian()) {
1104 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1105 << '\t' << TAI->getCommentString()
1106 << " Double-word most significant word " << Val << '\n';
1107 O << TAI->getData32bitsDirective() << unsigned(Val)
1108 << '\t' << TAI->getCommentString()
1109 << " Double-word least significant word " << Val << '\n';
1111 O << TAI->getData32bitsDirective() << unsigned(Val)
1112 << '\t' << TAI->getCommentString()
1113 << " Double-word least significant word " << Val << '\n';
1114 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1115 << '\t' << TAI->getCommentString()
1116 << " Double-word most significant word " << Val << '\n';
1121 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1122 const VectorType *PTy = CP->getType();
1124 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
1125 EmitGlobalConstant(CP->getOperand(I));
1130 const Type *type = CV->getType();
1131 printDataDirective(type);
1132 EmitConstantValueOnly(CV);
1133 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1135 CI->getValue().toStringUnsigned(S, 16);
1136 O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
1141 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1142 // Target doesn't support this yet!
1146 /// PrintSpecial - Print information related to the specified machine instr
1147 /// that is independent of the operand, and may be independent of the instr
1148 /// itself. This can be useful for portably encoding the comment character
1149 /// or other bits of target-specific knowledge into the asmstrings. The
1150 /// syntax used is ${:comment}. Targets can override this to add support
1151 /// for their own strange codes.
1152 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) {
1153 if (!strcmp(Code, "private")) {
1154 O << TAI->getPrivateGlobalPrefix();
1155 } else if (!strcmp(Code, "comment")) {
1156 O << TAI->getCommentString();
1157 } else if (!strcmp(Code, "uid")) {
1158 // Assign a unique ID to this machine instruction.
1159 static const MachineInstr *LastMI = 0;
1160 static const Function *F = 0;
1161 static unsigned Counter = 0U-1;
1163 // Comparing the address of MI isn't sufficient, because machineinstrs may
1164 // be allocated to the same address across functions.
1165 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1167 // If this is a new machine instruction, bump the counter.
1168 if (LastMI != MI || F != ThisF) {
1175 cerr << "Unknown special formatter '" << Code
1176 << "' for machine instr: " << *MI;
1182 /// printInlineAsm - This method formats and prints the specified machine
1183 /// instruction that is an inline asm.
1184 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1185 unsigned NumOperands = MI->getNumOperands();
1187 // Count the number of register definitions.
1188 unsigned NumDefs = 0;
1189 for (; MI->getOperand(NumDefs).isRegister() && MI->getOperand(NumDefs).isDef();
1191 assert(NumDefs != NumOperands-1 && "No asm string?");
1193 assert(MI->getOperand(NumDefs).isExternalSymbol() && "No asm string?");
1195 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1196 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1198 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1199 // These are useful to see where empty asm's wound up.
1200 if (AsmStr[0] == 0) {
1201 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1205 O << TAI->getInlineAsmStart() << "\n\t";
1207 // The variant of the current asmprinter.
1208 int AsmPrinterVariant = TAI->getAssemblerDialect();
1210 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1211 const char *LastEmitted = AsmStr; // One past the last character emitted.
1213 while (*LastEmitted) {
1214 switch (*LastEmitted) {
1216 // Not a special case, emit the string section literally.
1217 const char *LiteralEnd = LastEmitted+1;
1218 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1219 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1221 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1222 O.write(LastEmitted, LiteralEnd-LastEmitted);
1223 LastEmitted = LiteralEnd;
1227 ++LastEmitted; // Consume newline character.
1228 O << '\n'; // Indent code with newline.
1231 ++LastEmitted; // Consume '$' character.
1235 switch (*LastEmitted) {
1236 default: Done = false; break;
1237 case '$': // $$ -> $
1238 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1240 ++LastEmitted; // Consume second '$' character.
1242 case '(': // $( -> same as GCC's { character.
1243 ++LastEmitted; // Consume '(' character.
1244 if (CurVariant != -1) {
1245 cerr << "Nested variants found in inline asm string: '"
1249 CurVariant = 0; // We're in the first variant now.
1252 ++LastEmitted; // consume '|' character.
1253 if (CurVariant == -1) {
1254 cerr << "Found '|' character outside of variant in inline asm "
1255 << "string: '" << AsmStr << "'\n";
1258 ++CurVariant; // We're in the next variant.
1260 case ')': // $) -> same as GCC's } char.
1261 ++LastEmitted; // consume ')' character.
1262 if (CurVariant == -1) {
1263 cerr << "Found '}' character outside of variant in inline asm "
1264 << "string: '" << AsmStr << "'\n";
1272 bool HasCurlyBraces = false;
1273 if (*LastEmitted == '{') { // ${variable}
1274 ++LastEmitted; // Consume '{' character.
1275 HasCurlyBraces = true;
1278 const char *IDStart = LastEmitted;
1281 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1282 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1283 cerr << "Bad $ operand number in inline asm string: '"
1287 LastEmitted = IDEnd;
1289 char Modifier[2] = { 0, 0 };
1291 if (HasCurlyBraces) {
1292 // If we have curly braces, check for a modifier character. This
1293 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1294 if (*LastEmitted == ':') {
1295 ++LastEmitted; // Consume ':' character.
1296 if (*LastEmitted == 0) {
1297 cerr << "Bad ${:} expression in inline asm string: '"
1302 Modifier[0] = *LastEmitted;
1303 ++LastEmitted; // Consume modifier character.
1306 if (*LastEmitted != '}') {
1307 cerr << "Bad ${} expression in inline asm string: '"
1311 ++LastEmitted; // Consume '}' character.
1314 if ((unsigned)Val >= NumOperands-1) {
1315 cerr << "Invalid $ operand number in inline asm string: '"
1320 // Okay, we finally have a value number. Ask the target to print this
1322 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1327 // Scan to find the machine operand number for the operand.
1328 for (; Val; --Val) {
1329 if (OpNo >= MI->getNumOperands()) break;
1330 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1331 OpNo += (OpFlags >> 3) + 1;
1334 if (OpNo >= MI->getNumOperands()) {
1337 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1338 ++OpNo; // Skip over the ID number.
1340 if (Modifier[0]=='l') // labels are target independent
1341 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1342 false, false, false);
1344 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1345 if ((OpFlags & 7) == 4) {
1346 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1347 Modifier[0] ? Modifier : 0);
1349 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1350 Modifier[0] ? Modifier : 0);
1355 cerr << "Invalid operand found in inline asm: '"
1365 O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1368 /// printImplicitDef - This method prints the specified machine instruction
1369 /// that is an implicit def.
1370 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1371 O << '\t' << TAI->getCommentString() << " implicit-def: "
1372 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1375 /// printLabel - This method prints a local label used by debug and
1376 /// exception handling tables.
1377 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1378 printLabel(MI->getOperand(0).getImm());
1381 void AsmPrinter::printLabel(unsigned Id) const {
1382 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1385 /// printDeclare - This method prints a local variable declaration used by
1387 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1388 /// entry into dwarf table.
1389 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1390 int FI = MI->getOperand(0).getIndex();
1391 GlobalValue *GV = MI->getOperand(1).getGlobal();
1392 MMI->RecordVariable(GV, FI);
1395 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1396 /// instruction, using the specified assembler variant. Targets should
1397 /// overried this to format as appropriate.
1398 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1399 unsigned AsmVariant, const char *ExtraCode) {
1400 // Target doesn't support this yet!
1404 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1405 unsigned AsmVariant,
1406 const char *ExtraCode) {
1407 // Target doesn't support this yet!
1411 /// printBasicBlockLabel - This method prints the label for the specified
1412 /// MachineBasicBlock
1413 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1416 bool printComment) const {
1418 unsigned Align = MBB->getAlignment();
1420 EmitAlignment(Log2_32(Align));
1423 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1424 << MBB->getNumber();
1427 if (printComment && MBB->getBasicBlock())
1428 O << '\t' << TAI->getCommentString() << ' '
1429 << MBB->getBasicBlock()->getNameStart();
1432 /// printPICJumpTableSetLabel - This method prints a set label for the
1433 /// specified MachineBasicBlock for a jumptable entry.
1434 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1435 const MachineBasicBlock *MBB) const {
1436 if (!TAI->getSetDirective())
1439 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1440 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1441 printBasicBlockLabel(MBB, false, false, false);
1442 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1443 << '_' << uid << '\n';
1446 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1447 const MachineBasicBlock *MBB) const {
1448 if (!TAI->getSetDirective())
1451 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1452 << getFunctionNumber() << '_' << uid << '_' << uid2
1453 << "_set_" << MBB->getNumber() << ',';
1454 printBasicBlockLabel(MBB, false, false, false);
1455 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1456 << '_' << uid << '_' << uid2 << '\n';
1459 /// printDataDirective - This method prints the asm directive for the
1461 void AsmPrinter::printDataDirective(const Type *type) {
1462 const TargetData *TD = TM.getTargetData();
1463 switch (type->getTypeID()) {
1464 case Type::IntegerTyID: {
1465 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1467 O << TAI->getData8bitsDirective();
1468 else if (BitWidth <= 16)
1469 O << TAI->getData16bitsDirective();
1470 else if (BitWidth <= 32)
1471 O << TAI->getData32bitsDirective();
1472 else if (BitWidth <= 64) {
1473 assert(TAI->getData64bitsDirective() &&
1474 "Target cannot handle 64-bit constant exprs!");
1475 O << TAI->getData64bitsDirective();
1477 assert(0 && "Target cannot handle given data directive width!");
1481 case Type::PointerTyID:
1482 if (TD->getPointerSize() == 8) {
1483 assert(TAI->getData64bitsDirective() &&
1484 "Target cannot handle 64-bit pointer exprs!");
1485 O << TAI->getData64bitsDirective();
1487 O << TAI->getData32bitsDirective();
1490 case Type::FloatTyID: case Type::DoubleTyID:
1491 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1492 assert (0 && "Should have already output floating point constant.");
1494 assert (0 && "Can't handle printing this type of thing");
1499 void AsmPrinter::printSuffixedName(const char *Name, const char *Suffix,
1500 const char *Prefix) {
1503 O << TAI->getPrivateGlobalPrefix();
1504 if (Prefix) O << Prefix;
1516 void AsmPrinter::printSuffixedName(const std::string &Name, const char* Suffix) {
1517 printSuffixedName(Name.c_str(), Suffix);
1520 void AsmPrinter::printVisibility(const std::string& Name,
1521 unsigned Visibility) const {
1522 if (Visibility == GlobalValue::HiddenVisibility) {
1523 if (const char *Directive = TAI->getHiddenDirective())
1524 O << Directive << Name << '\n';
1525 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1526 if (const char *Directive = TAI->getProtectedDirective())
1527 O << Directive << Name << '\n';
1531 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
1532 if (!S->usesMetadata())
1535 gcp_iterator GCPI = GCMetadataPrinters.find(S);
1536 if (GCPI != GCMetadataPrinters.end())
1537 return GCPI->second;
1539 const char *Name = S->getName().c_str();
1541 for (GCMetadataPrinterRegistry::iterator
1542 I = GCMetadataPrinterRegistry::begin(),
1543 E = GCMetadataPrinterRegistry::end(); I != E; ++I)
1544 if (strcmp(Name, I->getName()) == 0) {
1545 GCMetadataPrinter *GMP = I->instantiate();
1547 GCMetadataPrinters.insert(std::make_pair(S, GMP));
1551 cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";