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 {
537 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
539 if (Value) Byte |= 0x80;
540 O << "0x" << utohex_buffer(Byte, Buffer+20);
541 if (Value) O << ", ";
545 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
546 /// representing a signed leb128 value.
547 void AsmPrinter::PrintSLEB128(int Value) const {
548 int Sign = Value >> (8 * sizeof(Value) - 1);
553 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
555 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
556 if (IsMore) Byte |= 0x80;
557 O << "0x" << utohex_buffer(Byte, Buffer+20);
558 if (IsMore) O << ", ";
562 //===--------------------------------------------------------------------===//
563 // Emission and print routines
566 /// PrintHex - Print a value as a hexidecimal value.
568 void AsmPrinter::PrintHex(int Value) const {
570 O << "0x" << utohex_buffer(static_cast<unsigned>(Value), Buffer+20);
573 /// EOL - Print a newline character to asm stream. If a comment is present
574 /// then it will be printed first. Comments should not contain '\n'.
575 void AsmPrinter::EOL() const {
579 void AsmPrinter::EOL(const std::string &Comment) const {
580 if (VerboseAsm && !Comment.empty()) {
582 << TAI->getCommentString()
589 void AsmPrinter::EOL(const char* Comment) const {
590 if (VerboseAsm && *Comment) {
592 << TAI->getCommentString()
599 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
600 /// unsigned leb128 value.
601 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
602 if (TAI->hasLEB128()) {
606 O << TAI->getData8bitsDirective();
611 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
612 /// signed leb128 value.
613 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
614 if (TAI->hasLEB128()) {
618 O << TAI->getData8bitsDirective();
623 /// EmitInt8 - Emit a byte directive and value.
625 void AsmPrinter::EmitInt8(int Value) const {
626 O << TAI->getData8bitsDirective();
627 PrintHex(Value & 0xFF);
630 /// EmitInt16 - Emit a short directive and value.
632 void AsmPrinter::EmitInt16(int Value) const {
633 O << TAI->getData16bitsDirective();
634 PrintHex(Value & 0xFFFF);
637 /// EmitInt32 - Emit a long directive and value.
639 void AsmPrinter::EmitInt32(int Value) const {
640 O << TAI->getData32bitsDirective();
644 /// EmitInt64 - Emit a long long directive and value.
646 void AsmPrinter::EmitInt64(uint64_t Value) const {
647 if (TAI->getData64bitsDirective()) {
648 O << TAI->getData64bitsDirective();
651 if (TM.getTargetData()->isBigEndian()) {
652 EmitInt32(unsigned(Value >> 32)); O << '\n';
653 EmitInt32(unsigned(Value));
655 EmitInt32(unsigned(Value)); O << '\n';
656 EmitInt32(unsigned(Value >> 32));
661 /// toOctal - Convert the low order bits of X into an octal digit.
663 static inline char toOctal(int X) {
667 /// printStringChar - Print a char, escaped if necessary.
669 static void printStringChar(raw_ostream &O, char C) {
672 } else if (C == '\\') {
674 } else if (isprint(C)) {
678 case '\b': O << "\\b"; break;
679 case '\f': O << "\\f"; break;
680 case '\n': O << "\\n"; break;
681 case '\r': O << "\\r"; break;
682 case '\t': O << "\\t"; break;
685 O << toOctal(C >> 6);
686 O << toOctal(C >> 3);
687 O << toOctal(C >> 0);
693 /// EmitString - Emit a string with quotes and a null terminator.
694 /// Special characters are emitted properly.
695 /// \literal (Eg. '\t') \endliteral
696 void AsmPrinter::EmitString(const std::string &String) const {
697 const char* AscizDirective = TAI->getAscizDirective();
701 O << TAI->getAsciiDirective();
703 for (unsigned i = 0, N = String.size(); i < N; ++i) {
704 unsigned char C = String[i];
705 printStringChar(O, C);
714 /// EmitFile - Emit a .file directive.
715 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
716 O << "\t.file\t" << Number << " \"";
717 for (unsigned i = 0, N = Name.size(); i < N; ++i) {
718 unsigned char C = Name[i];
719 printStringChar(O, C);
725 //===----------------------------------------------------------------------===//
727 // EmitAlignment - Emit an alignment directive to the specified power of
728 // two boundary. For example, if you pass in 3 here, you will get an 8
729 // byte alignment. If a global value is specified, and if that global has
730 // an explicit alignment requested, it will unconditionally override the
731 // alignment request. However, if ForcedAlignBits is specified, this value
732 // has final say: the ultimate alignment will be the max of ForcedAlignBits
733 // and the alignment computed with NumBits and the global.
737 // if (GV && GV->hasalignment) Align = GV->getalignment();
738 // Align = std::max(Align, ForcedAlignBits);
740 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
741 unsigned ForcedAlignBits,
742 bool UseFillExpr) const {
743 if (GV && GV->getAlignment())
744 NumBits = Log2_32(GV->getAlignment());
745 NumBits = std::max(NumBits, ForcedAlignBits);
747 if (NumBits == 0) return; // No need to emit alignment.
748 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
749 O << TAI->getAlignDirective() << NumBits;
751 unsigned FillValue = TAI->getTextAlignFillValue();
752 UseFillExpr &= IsInTextSection && FillValue;
761 /// EmitZeros - Emit a block of zeros.
763 void AsmPrinter::EmitZeros(uint64_t NumZeros) const {
765 if (TAI->getZeroDirective()) {
766 O << TAI->getZeroDirective() << NumZeros;
767 if (TAI->getZeroDirectiveSuffix())
768 O << TAI->getZeroDirectiveSuffix();
771 for (; NumZeros; --NumZeros)
772 O << TAI->getData8bitsDirective() << "0\n";
777 // Print out the specified constant, without a storage class. Only the
778 // constants valid in constant expressions can occur here.
779 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
780 if (CV->isNullValue() || isa<UndefValue>(CV))
782 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
783 O << CI->getZExtValue();
784 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
785 // This is a constant address for a global variable or function. Use the
786 // name of the variable or function as the address value, possibly
787 // decorating it with GlobalVarAddrPrefix/Suffix or
788 // FunctionAddrPrefix/Suffix (these all default to "" )
789 if (isa<Function>(GV)) {
790 O << TAI->getFunctionAddrPrefix()
791 << Mang->getValueName(GV)
792 << TAI->getFunctionAddrSuffix();
794 O << TAI->getGlobalVarAddrPrefix()
795 << Mang->getValueName(GV)
796 << TAI->getGlobalVarAddrSuffix();
798 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
799 const TargetData *TD = TM.getTargetData();
800 unsigned Opcode = CE->getOpcode();
802 case Instruction::GetElementPtr: {
803 // generate a symbolic expression for the byte address
804 const Constant *ptrVal = CE->getOperand(0);
805 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
806 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
810 EmitConstantValueOnly(ptrVal);
812 O << ") + " << Offset;
814 O << ") - " << -Offset;
816 EmitConstantValueOnly(ptrVal);
820 case Instruction::Trunc:
821 case Instruction::ZExt:
822 case Instruction::SExt:
823 case Instruction::FPTrunc:
824 case Instruction::FPExt:
825 case Instruction::UIToFP:
826 case Instruction::SIToFP:
827 case Instruction::FPToUI:
828 case Instruction::FPToSI:
829 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
831 case Instruction::BitCast:
832 return EmitConstantValueOnly(CE->getOperand(0));
834 case Instruction::IntToPtr: {
835 // Handle casts to pointers by changing them into casts to the appropriate
836 // integer type. This promotes constant folding and simplifies this code.
837 Constant *Op = CE->getOperand(0);
838 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
839 return EmitConstantValueOnly(Op);
843 case Instruction::PtrToInt: {
844 // Support only foldable casts to/from pointers that can be eliminated by
845 // changing the pointer to the appropriately sized integer type.
846 Constant *Op = CE->getOperand(0);
847 const Type *Ty = CE->getType();
849 // We can emit the pointer value into this slot if the slot is an
850 // integer slot greater or equal to the size of the pointer.
851 if (TD->getABITypeSize(Ty) >= TD->getABITypeSize(Op->getType()))
852 return EmitConstantValueOnly(Op);
855 EmitConstantValueOnly(Op);
856 APInt ptrMask = APInt::getAllOnesValue(TD->getABITypeSizeInBits(Ty));
859 ptrMask.toStringUnsigned(S);
860 O << ") & " << S.c_str() << ')';
863 case Instruction::Add:
864 case Instruction::Sub:
865 case Instruction::And:
866 case Instruction::Or:
867 case Instruction::Xor:
869 EmitConstantValueOnly(CE->getOperand(0));
872 case Instruction::Add:
875 case Instruction::Sub:
878 case Instruction::And:
881 case Instruction::Or:
884 case Instruction::Xor:
891 EmitConstantValueOnly(CE->getOperand(1));
895 assert(0 && "Unsupported operator!");
898 assert(0 && "Unknown constant value!");
902 /// printAsCString - Print the specified array as a C compatible string, only if
903 /// the predicate isString is true.
905 static void printAsCString(raw_ostream &O, const ConstantArray *CVA,
907 assert(CVA->isString() && "Array is not string compatible!");
910 for (unsigned i = 0; i != LastElt; ++i) {
912 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
913 printStringChar(O, C);
918 /// EmitString - Emit a zero-byte-terminated string constant.
920 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
921 unsigned NumElts = CVA->getNumOperands();
922 if (TAI->getAscizDirective() && NumElts &&
923 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
924 O << TAI->getAscizDirective();
925 printAsCString(O, CVA, NumElts-1);
927 O << TAI->getAsciiDirective();
928 printAsCString(O, CVA, NumElts);
933 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
934 void AsmPrinter::EmitGlobalConstant(const Constant *CV) {
935 const TargetData *TD = TM.getTargetData();
936 unsigned Size = TD->getABITypeSize(CV->getType());
938 if (CV->isNullValue() || isa<UndefValue>(CV)) {
941 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
942 if (CVA->isString()) {
944 } else { // Not a string. Print the values in successive locations
945 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
946 EmitGlobalConstant(CVA->getOperand(i));
949 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
950 // Print the fields in successive locations. Pad to align if needed!
951 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
952 uint64_t sizeSoFar = 0;
953 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
954 const Constant* field = CVS->getOperand(i);
956 // Check if padding is needed and insert one or more 0s.
957 uint64_t fieldSize = TD->getABITypeSize(field->getType());
958 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
959 - cvsLayout->getElementOffset(i)) - fieldSize;
960 sizeSoFar += fieldSize + padSize;
962 // Now print the actual field value.
963 EmitGlobalConstant(field);
965 // Insert padding - this may include padding to increase the size of the
966 // current field up to the ABI size (if the struct is not packed) as well
967 // as padding to ensure that the next field starts at the right offset.
970 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
971 "Layout of constant struct may be incorrect!");
973 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
974 // FP Constants are printed as integer constants to avoid losing
976 if (CFP->getType() == Type::DoubleTy) {
977 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
978 uint64_t i = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
979 if (TAI->getData64bitsDirective())
980 O << TAI->getData64bitsDirective() << i << '\t'
981 << TAI->getCommentString() << " double value: " << Val << '\n';
982 else if (TD->isBigEndian()) {
983 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
984 << '\t' << TAI->getCommentString()
985 << " double most significant word " << Val << '\n';
986 O << TAI->getData32bitsDirective() << unsigned(i)
987 << '\t' << TAI->getCommentString()
988 << " double least significant word " << Val << '\n';
990 O << TAI->getData32bitsDirective() << unsigned(i)
991 << '\t' << TAI->getCommentString()
992 << " double least significant word " << Val << '\n';
993 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
994 << '\t' << TAI->getCommentString()
995 << " double most significant word " << Val << '\n';
998 } else if (CFP->getType() == Type::FloatTy) {
999 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
1000 O << TAI->getData32bitsDirective()
1001 << CFP->getValueAPF().bitcastToAPInt().getZExtValue()
1002 << '\t' << TAI->getCommentString() << " float " << Val << '\n';
1004 } else if (CFP->getType() == Type::X86_FP80Ty) {
1005 // all long double variants are printed as hex
1006 // api needed to prevent premature destruction
1007 APInt api = CFP->getValueAPF().bitcastToAPInt();
1008 const uint64_t *p = api.getRawData();
1009 // Convert to double so we can print the approximate val as a comment.
1010 APFloat DoubleVal = CFP->getValueAPF();
1012 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
1014 if (TD->isBigEndian()) {
1015 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
1016 << '\t' << TAI->getCommentString()
1017 << " long double most significant halfword of ~"
1018 << DoubleVal.convertToDouble() << '\n';
1019 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
1020 << '\t' << TAI->getCommentString()
1021 << " long double next halfword\n";
1022 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
1023 << '\t' << TAI->getCommentString()
1024 << " long double next halfword\n";
1025 O << TAI->getData16bitsDirective() << uint16_t(p[0])
1026 << '\t' << TAI->getCommentString()
1027 << " long double next halfword\n";
1028 O << TAI->getData16bitsDirective() << uint16_t(p[1])
1029 << '\t' << TAI->getCommentString()
1030 << " long double least significant halfword\n";
1032 O << TAI->getData16bitsDirective() << uint16_t(p[1])
1033 << '\t' << TAI->getCommentString()
1034 << " long double least significant halfword of ~"
1035 << DoubleVal.convertToDouble() << '\n';
1036 O << TAI->getData16bitsDirective() << uint16_t(p[0])
1037 << '\t' << TAI->getCommentString()
1038 << " long double next halfword\n";
1039 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
1040 << '\t' << TAI->getCommentString()
1041 << " long double next halfword\n";
1042 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
1043 << '\t' << TAI->getCommentString()
1044 << " long double next halfword\n";
1045 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
1046 << '\t' << TAI->getCommentString()
1047 << " long double most significant halfword\n";
1049 EmitZeros(Size - TD->getTypeStoreSize(Type::X86_FP80Ty));
1051 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1052 // all long double variants are printed as hex
1053 // api needed to prevent premature destruction
1054 APInt api = CFP->getValueAPF().bitcastToAPInt();
1055 const uint64_t *p = api.getRawData();
1056 if (TD->isBigEndian()) {
1057 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1058 << '\t' << TAI->getCommentString()
1059 << " long double most significant word\n";
1060 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1061 << '\t' << TAI->getCommentString()
1062 << " long double next word\n";
1063 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1064 << '\t' << TAI->getCommentString()
1065 << " long double next word\n";
1066 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1067 << '\t' << TAI->getCommentString()
1068 << " long double least significant word\n";
1070 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1071 << '\t' << TAI->getCommentString()
1072 << " long double least significant word\n";
1073 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1074 << '\t' << TAI->getCommentString()
1075 << " long double next word\n";
1076 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1077 << '\t' << TAI->getCommentString()
1078 << " long double next word\n";
1079 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1080 << '\t' << TAI->getCommentString()
1081 << " long double most significant word\n";
1084 } else assert(0 && "Floating point constant type not handled");
1085 } else if (CV->getType()->isInteger() &&
1086 cast<IntegerType>(CV->getType())->getBitWidth() >= 64) {
1087 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1088 unsigned BitWidth = CI->getBitWidth();
1089 assert(isPowerOf2_32(BitWidth) &&
1090 "Non-power-of-2-sized integers not handled!");
1092 // We don't expect assemblers to support integer data directives
1093 // for more than 64 bits, so we emit the data in at most 64-bit
1094 // quantities at a time.
1095 const uint64_t *RawData = CI->getValue().getRawData();
1096 for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
1098 if (TD->isBigEndian())
1099 Val = RawData[e - i - 1];
1103 if (TAI->getData64bitsDirective())
1104 O << TAI->getData64bitsDirective() << Val << '\n';
1105 else if (TD->isBigEndian()) {
1106 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1107 << '\t' << TAI->getCommentString()
1108 << " Double-word most significant word " << Val << '\n';
1109 O << TAI->getData32bitsDirective() << unsigned(Val)
1110 << '\t' << TAI->getCommentString()
1111 << " Double-word least significant word " << Val << '\n';
1113 O << TAI->getData32bitsDirective() << unsigned(Val)
1114 << '\t' << TAI->getCommentString()
1115 << " Double-word least significant word " << Val << '\n';
1116 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1117 << '\t' << TAI->getCommentString()
1118 << " Double-word most significant word " << Val << '\n';
1123 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1124 const VectorType *PTy = CP->getType();
1126 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
1127 EmitGlobalConstant(CP->getOperand(I));
1132 const Type *type = CV->getType();
1133 printDataDirective(type);
1134 EmitConstantValueOnly(CV);
1135 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1137 CI->getValue().toStringUnsigned(S, 16);
1138 O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
1143 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1144 // Target doesn't support this yet!
1148 /// PrintSpecial - Print information related to the specified machine instr
1149 /// that is independent of the operand, and may be independent of the instr
1150 /// itself. This can be useful for portably encoding the comment character
1151 /// or other bits of target-specific knowledge into the asmstrings. The
1152 /// syntax used is ${:comment}. Targets can override this to add support
1153 /// for their own strange codes.
1154 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) {
1155 if (!strcmp(Code, "private")) {
1156 O << TAI->getPrivateGlobalPrefix();
1157 } else if (!strcmp(Code, "comment")) {
1158 O << TAI->getCommentString();
1159 } else if (!strcmp(Code, "uid")) {
1160 // Assign a unique ID to this machine instruction.
1161 static const MachineInstr *LastMI = 0;
1162 static const Function *F = 0;
1163 static unsigned Counter = 0U-1;
1165 // Comparing the address of MI isn't sufficient, because machineinstrs may
1166 // be allocated to the same address across functions.
1167 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1169 // If this is a new machine instruction, bump the counter.
1170 if (LastMI != MI || F != ThisF) {
1177 cerr << "Unknown special formatter '" << Code
1178 << "' for machine instr: " << *MI;
1184 /// printInlineAsm - This method formats and prints the specified machine
1185 /// instruction that is an inline asm.
1186 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1187 unsigned NumOperands = MI->getNumOperands();
1189 // Count the number of register definitions.
1190 unsigned NumDefs = 0;
1191 for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
1193 assert(NumDefs != NumOperands-1 && "No asm string?");
1195 assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
1197 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1198 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1200 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1201 // These are useful to see where empty asm's wound up.
1202 if (AsmStr[0] == 0) {
1203 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1207 O << TAI->getInlineAsmStart() << "\n\t";
1209 // The variant of the current asmprinter.
1210 int AsmPrinterVariant = TAI->getAssemblerDialect();
1212 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1213 const char *LastEmitted = AsmStr; // One past the last character emitted.
1215 while (*LastEmitted) {
1216 switch (*LastEmitted) {
1218 // Not a special case, emit the string section literally.
1219 const char *LiteralEnd = LastEmitted+1;
1220 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1221 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1223 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1224 O.write(LastEmitted, LiteralEnd-LastEmitted);
1225 LastEmitted = LiteralEnd;
1229 ++LastEmitted; // Consume newline character.
1230 O << '\n'; // Indent code with newline.
1233 ++LastEmitted; // Consume '$' character.
1237 switch (*LastEmitted) {
1238 default: Done = false; break;
1239 case '$': // $$ -> $
1240 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1242 ++LastEmitted; // Consume second '$' character.
1244 case '(': // $( -> same as GCC's { character.
1245 ++LastEmitted; // Consume '(' character.
1246 if (CurVariant != -1) {
1247 cerr << "Nested variants found in inline asm string: '"
1251 CurVariant = 0; // We're in the first variant now.
1254 ++LastEmitted; // consume '|' character.
1255 if (CurVariant == -1)
1256 O << '|'; // this is gcc's behavior for | outside a variant
1258 ++CurVariant; // We're in the next variant.
1260 case ')': // $) -> same as GCC's } char.
1261 ++LastEmitted; // consume ')' character.
1262 if (CurVariant == -1)
1263 O << '}'; // this is gcc's behavior for } outside a variant
1270 bool HasCurlyBraces = false;
1271 if (*LastEmitted == '{') { // ${variable}
1272 ++LastEmitted; // Consume '{' character.
1273 HasCurlyBraces = true;
1276 const char *IDStart = LastEmitted;
1279 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1280 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1281 cerr << "Bad $ operand number in inline asm string: '"
1285 LastEmitted = IDEnd;
1287 char Modifier[2] = { 0, 0 };
1289 if (HasCurlyBraces) {
1290 // If we have curly braces, check for a modifier character. This
1291 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1292 if (*LastEmitted == ':') {
1293 ++LastEmitted; // Consume ':' character.
1294 if (*LastEmitted == 0) {
1295 cerr << "Bad ${:} expression in inline asm string: '"
1300 Modifier[0] = *LastEmitted;
1301 ++LastEmitted; // Consume modifier character.
1304 if (*LastEmitted != '}') {
1305 cerr << "Bad ${} expression in inline asm string: '"
1309 ++LastEmitted; // Consume '}' character.
1312 if ((unsigned)Val >= NumOperands-1) {
1313 cerr << "Invalid $ operand number in inline asm string: '"
1318 // Okay, we finally have a value number. Ask the target to print this
1320 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1325 // Scan to find the machine operand number for the operand.
1326 for (; Val; --Val) {
1327 if (OpNo >= MI->getNumOperands()) break;
1328 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1329 OpNo += (OpFlags >> 3) + 1;
1332 if (OpNo >= MI->getNumOperands()) {
1335 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1336 ++OpNo; // Skip over the ID number.
1338 if (Modifier[0]=='l') // labels are target independent
1339 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1340 false, false, false);
1342 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1343 if ((OpFlags & 7) == 4) {
1344 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1345 Modifier[0] ? Modifier : 0);
1347 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1348 Modifier[0] ? Modifier : 0);
1353 cerr << "Invalid operand found in inline asm: '"
1363 O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1366 /// printImplicitDef - This method prints the specified machine instruction
1367 /// that is an implicit def.
1368 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1369 O << '\t' << TAI->getCommentString() << " implicit-def: "
1370 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1373 /// printLabel - This method prints a local label used by debug and
1374 /// exception handling tables.
1375 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1376 printLabel(MI->getOperand(0).getImm());
1379 void AsmPrinter::printLabel(unsigned Id) const {
1380 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1383 /// printDeclare - This method prints a local variable declaration used by
1385 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1386 /// entry into dwarf table.
1387 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1388 int FI = MI->getOperand(0).getIndex();
1389 GlobalValue *GV = MI->getOperand(1).getGlobal();
1390 MMI->RecordVariable(GV, FI);
1393 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1394 /// instruction, using the specified assembler variant. Targets should
1395 /// overried this to format as appropriate.
1396 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1397 unsigned AsmVariant, const char *ExtraCode) {
1398 // Target doesn't support this yet!
1402 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1403 unsigned AsmVariant,
1404 const char *ExtraCode) {
1405 // Target doesn't support this yet!
1409 /// printBasicBlockLabel - This method prints the label for the specified
1410 /// MachineBasicBlock
1411 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1414 bool printComment) const {
1416 unsigned Align = MBB->getAlignment();
1418 EmitAlignment(Log2_32(Align));
1421 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1422 << MBB->getNumber();
1425 if (printComment && MBB->getBasicBlock())
1426 O << '\t' << TAI->getCommentString() << ' '
1427 << MBB->getBasicBlock()->getNameStart();
1430 /// printPICJumpTableSetLabel - This method prints a set label for the
1431 /// specified MachineBasicBlock for a jumptable entry.
1432 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1433 const MachineBasicBlock *MBB) const {
1434 if (!TAI->getSetDirective())
1437 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1438 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1439 printBasicBlockLabel(MBB, false, false, false);
1440 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1441 << '_' << uid << '\n';
1444 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1445 const MachineBasicBlock *MBB) const {
1446 if (!TAI->getSetDirective())
1449 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1450 << getFunctionNumber() << '_' << uid << '_' << uid2
1451 << "_set_" << MBB->getNumber() << ',';
1452 printBasicBlockLabel(MBB, false, false, false);
1453 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1454 << '_' << uid << '_' << uid2 << '\n';
1457 /// printDataDirective - This method prints the asm directive for the
1459 void AsmPrinter::printDataDirective(const Type *type) {
1460 const TargetData *TD = TM.getTargetData();
1461 switch (type->getTypeID()) {
1462 case Type::IntegerTyID: {
1463 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1465 O << TAI->getData8bitsDirective();
1466 else if (BitWidth <= 16)
1467 O << TAI->getData16bitsDirective();
1468 else if (BitWidth <= 32)
1469 O << TAI->getData32bitsDirective();
1470 else if (BitWidth <= 64) {
1471 assert(TAI->getData64bitsDirective() &&
1472 "Target cannot handle 64-bit constant exprs!");
1473 O << TAI->getData64bitsDirective();
1475 assert(0 && "Target cannot handle given data directive width!");
1479 case Type::PointerTyID:
1480 if (TD->getPointerSize() == 8) {
1481 assert(TAI->getData64bitsDirective() &&
1482 "Target cannot handle 64-bit pointer exprs!");
1483 O << TAI->getData64bitsDirective();
1485 O << TAI->getData32bitsDirective();
1488 case Type::FloatTyID: case Type::DoubleTyID:
1489 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1490 assert (0 && "Should have already output floating point constant.");
1492 assert (0 && "Can't handle printing this type of thing");
1497 void AsmPrinter::printSuffixedName(const char *Name, const char *Suffix,
1498 const char *Prefix) {
1501 O << TAI->getPrivateGlobalPrefix();
1502 if (Prefix) O << Prefix;
1514 void AsmPrinter::printSuffixedName(const std::string &Name, const char* Suffix) {
1515 printSuffixedName(Name.c_str(), Suffix);
1518 void AsmPrinter::printVisibility(const std::string& Name,
1519 unsigned Visibility) const {
1520 if (Visibility == GlobalValue::HiddenVisibility) {
1521 if (const char *Directive = TAI->getHiddenDirective())
1522 O << Directive << Name << '\n';
1523 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1524 if (const char *Directive = TAI->getProtectedDirective())
1525 O << Directive << Name << '\n';
1529 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
1530 if (!S->usesMetadata())
1533 gcp_iterator GCPI = GCMetadataPrinters.find(S);
1534 if (GCPI != GCMetadataPrinters.end())
1535 return GCPI->second;
1537 const char *Name = S->getName().c_str();
1539 for (GCMetadataPrinterRegistry::iterator
1540 I = GCMetadataPrinterRegistry::begin(),
1541 E = GCMetadataPrinterRegistry::end(); I != E; ++I)
1542 if (strcmp(Name, I->getName()) == 0) {
1543 GCMetadataPrinter *GMP = I->instantiate();
1545 GCMetadataPrinters.insert(std::make_pair(S, GMP));
1549 cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";