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/CodeGen/DwarfWriter.h"
24 #include "llvm/Support/Mangler.h"
25 #include "llvm/Support/raw_ostream.h"
26 #include "llvm/Target/TargetAsmInfo.h"
27 #include "llvm/Target/TargetData.h"
28 #include "llvm/Target/TargetLowering.h"
29 #include "llvm/Target/TargetMachine.h"
30 #include "llvm/Target/TargetOptions.h"
31 #include "llvm/Target/TargetRegisterInfo.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(), TAI->getPrivateGlobalPrefix());
144 GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
145 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
147 if (TAI->hasSingleParameterDotFile()) {
148 /* Very minimal debug info. It is ignored if we emit actual
149 debug info. If we don't, this at helps the user find where
150 a function came from. */
151 O << "\t.file\t\"" << M.getModuleIdentifier() << "\"\n";
154 for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
155 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
156 MP->beginAssembly(O, *this, *TAI);
158 if (!M.getModuleInlineAsm().empty())
159 O << TAI->getCommentString() << " Start of file scope inline assembly\n"
160 << M.getModuleInlineAsm()
161 << '\n' << TAI->getCommentString()
162 << " End of file scope inline assembly\n";
164 SwitchToDataSection(""); // Reset back to no section.
166 MachineModuleInfo *MMI = getAnalysisIfAvailable<MachineModuleInfo>();
167 if (MMI) MMI->AnalyzeModule(M);
168 DW = getAnalysisIfAvailable<DwarfWriter>();
172 bool AsmPrinter::doFinalization(Module &M) {
173 if (TAI->getWeakRefDirective()) {
174 if (!ExtWeakSymbols.empty())
175 SwitchToDataSection("");
177 for (std::set<const GlobalValue*>::iterator i = ExtWeakSymbols.begin(),
178 e = ExtWeakSymbols.end(); i != e; ++i) {
179 const GlobalValue *GV = *i;
180 std::string Name = Mang->getValueName(GV);
181 O << TAI->getWeakRefDirective() << Name << '\n';
185 if (TAI->getSetDirective()) {
186 if (!M.alias_empty())
187 SwitchToSection(TAI->getTextSection());
190 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
192 std::string Name = Mang->getValueName(I);
195 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
196 Target = Mang->getValueName(GV);
198 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
199 O << "\t.globl\t" << Name << '\n';
200 else if (I->hasWeakLinkage())
201 O << TAI->getWeakRefDirective() << Name << '\n';
202 else if (!I->hasLocalLinkage())
203 assert(0 && "Invalid alias linkage");
205 printVisibility(Name, I->getVisibility());
207 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
209 // If the aliasee has external weak linkage it can be referenced only by
210 // alias itself. In this case it can be not in ExtWeakSymbols list. Emit
211 // weak reference in such case.
212 if (GV->hasExternalWeakLinkage()) {
213 if (TAI->getWeakRefDirective())
214 O << TAI->getWeakRefDirective() << Target << '\n';
216 O << "\t.globl\t" << Target << '\n';
221 GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
222 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
223 for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
224 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
225 MP->finishAssembly(O, *this, *TAI);
227 // If we don't have any trampolines, then we don't require stack memory
228 // to be executable. Some targets have a directive to declare this.
229 Function* InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
230 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
231 if (TAI->getNonexecutableStackDirective())
232 O << TAI->getNonexecutableStackDirective() << '\n';
234 delete Mang; Mang = 0;
238 std::string AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) {
239 assert(MF && "No machine function?");
240 std::string Name = MF->getFunction()->getName();
242 Name = Mang->getValueName(MF->getFunction());
243 return Mang->makeNameProper(TAI->getEHGlobalPrefix() +
244 Name + ".eh", TAI->getGlobalPrefix());
247 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
248 // What's my mangled name?
249 CurrentFnName = Mang->getValueName(MF.getFunction());
250 IncrementFunctionNumber();
253 /// EmitConstantPool - Print to the current output stream assembly
254 /// representations of the constants in the constant pool MCP. This is
255 /// used to print out constants which have been "spilled to memory" by
256 /// the code generator.
258 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
259 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
260 if (CP.empty()) return;
262 // Calculate sections for constant pool entries. We collect entries to go into
263 // the same section together to reduce amount of section switch statements.
265 std::multimap<const Section*,
266 std::pair<MachineConstantPoolEntry, unsigned> > CPMap;
268 SmallPtrSet<const Section*, 5> Sections;
270 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
271 MachineConstantPoolEntry CPE = CP[i];
272 const Section* S = TAI->SelectSectionForMachineConst(CPE.getType());
273 CPs.insert(std::make_pair(S, std::make_pair(CPE, i)));
277 // Now print stuff into the calculated sections.
278 for (SmallPtrSet<const Section*, 5>::iterator IS = Sections.begin(),
279 ES = Sections.end(); IS != ES; ++IS) {
280 SwitchToSection(*IS);
281 EmitAlignment(MCP->getConstantPoolAlignment());
283 std::pair<CPMap::iterator, CPMap::iterator> II = CPs.equal_range(*IS);
284 for (CPMap::iterator I = II.first, E = II.second; I != E; ++I) {
285 CPMap::iterator J = next(I);
286 MachineConstantPoolEntry Entry = I->second.first;
287 unsigned index = I->second.second;
289 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
290 << index << ":\t\t\t\t\t";
291 // O << TAI->getCommentString() << ' ' <<
292 // WriteTypeSymbolic(O, CP[i].first.getType(), 0);
294 if (Entry.isMachineConstantPoolEntry())
295 EmitMachineConstantPoolValue(Entry.Val.MachineCPVal);
297 EmitGlobalConstant(Entry.Val.ConstVal);
299 // Emit inter-object padding for alignment.
301 const Type *Ty = Entry.getType();
302 unsigned EntSize = TM.getTargetData()->getTypePaddedSize(Ty);
303 unsigned ValEnd = Entry.getOffset() + EntSize;
304 EmitZeros(J->second.first.getOffset()-ValEnd);
310 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
311 /// by the current function to the current output stream.
313 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
314 MachineFunction &MF) {
315 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
316 if (JT.empty()) return;
318 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
320 // Pick the directive to use to print the jump table entries, and switch to
321 // the appropriate section.
322 TargetLowering *LoweringInfo = TM.getTargetLowering();
324 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
325 const Function *F = MF.getFunction();
326 unsigned SectionFlags = TAI->SectionFlagsForGlobal(F);
327 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
328 !JumpTableDataSection ||
329 SectionFlags & SectionFlags::Linkonce) {
330 // In PIC mode, we need to emit the jump table to the same section as the
331 // function body itself, otherwise the label differences won't make sense.
332 // We should also do if the section name is NULL or function is declared in
333 // discardable section.
334 SwitchToSection(TAI->SectionForGlobal(F));
336 SwitchToDataSection(JumpTableDataSection);
339 EmitAlignment(Log2_32(MJTI->getAlignment()));
341 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
342 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
344 // If this jump table was deleted, ignore it.
345 if (JTBBs.empty()) continue;
347 // For PIC codegen, if possible we want to use the SetDirective to reduce
348 // the number of relocations the assembler will generate for the jump table.
349 // Set directives are all printed before the jump table itself.
350 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
351 if (TAI->getSetDirective() && IsPic)
352 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
353 if (EmittedSets.insert(JTBBs[ii]))
354 printPICJumpTableSetLabel(i, JTBBs[ii]);
356 // On some targets (e.g. darwin) we want to emit two consequtive labels
357 // before each jump table. The first label is never referenced, but tells
358 // the assembler and linker the extents of the jump table object. The
359 // second label is actually referenced by the code.
360 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
361 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
363 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
364 << '_' << i << ":\n";
366 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
367 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
373 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
374 const MachineBasicBlock *MBB,
375 unsigned uid) const {
376 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
378 // Use JumpTableDirective otherwise honor the entry size from the jump table
380 const char *JTEntryDirective = TAI->getJumpTableDirective();
381 bool HadJTEntryDirective = JTEntryDirective != NULL;
382 if (!HadJTEntryDirective) {
383 JTEntryDirective = MJTI->getEntrySize() == 4 ?
384 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
387 O << JTEntryDirective << ' ';
389 // If we have emitted set directives for the jump table entries, print
390 // them rather than the entries themselves. If we're emitting PIC, then
391 // emit the table entries as differences between two text section labels.
392 // If we're emitting non-PIC code, then emit the entries as direct
393 // references to the target basic blocks.
395 if (TAI->getSetDirective()) {
396 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
397 << '_' << uid << "_set_" << MBB->getNumber();
399 printBasicBlockLabel(MBB, false, false, false);
400 // If the arch uses custom Jump Table directives, don't calc relative to
402 if (!HadJTEntryDirective)
403 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
404 << getFunctionNumber() << '_' << uid;
407 printBasicBlockLabel(MBB, false, false, false);
412 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
413 /// special global used by LLVM. If so, emit it and return true, otherwise
414 /// do nothing and return false.
415 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
416 if (GV->getName() == "llvm.used") {
417 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
418 EmitLLVMUsedList(GV->getInitializer());
422 // Ignore debug and non-emitted data.
423 if (GV->getSection() == "llvm.metadata") return true;
425 if (!GV->hasAppendingLinkage()) return false;
427 assert(GV->hasInitializer() && "Not a special LLVM global!");
429 const TargetData *TD = TM.getTargetData();
430 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
431 if (GV->getName() == "llvm.global_ctors" && GV->use_empty()) {
432 SwitchToDataSection(TAI->getStaticCtorsSection());
433 EmitAlignment(Align, 0);
434 EmitXXStructorList(GV->getInitializer());
438 if (GV->getName() == "llvm.global_dtors" && GV->use_empty()) {
439 SwitchToDataSection(TAI->getStaticDtorsSection());
440 EmitAlignment(Align, 0);
441 EmitXXStructorList(GV->getInitializer());
448 /// findGlobalValue - if CV is an expression equivalent to a single
449 /// global value, return that value.
450 const GlobalValue * AsmPrinter::findGlobalValue(const Constant *CV) {
451 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
453 else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
454 const TargetData *TD = TM.getTargetData();
455 unsigned Opcode = CE->getOpcode();
457 case Instruction::GetElementPtr: {
458 const Constant *ptrVal = CE->getOperand(0);
459 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
460 if (TD->getIndexedOffset(ptrVal->getType(), &idxVec[0], idxVec.size()))
462 return findGlobalValue(ptrVal);
464 case Instruction::BitCast:
465 return findGlobalValue(CE->getOperand(0));
473 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
474 /// global in the specified llvm.used list for which emitUsedDirectiveFor
475 /// is true, as being used with this directive.
477 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
478 const char *Directive = TAI->getUsedDirective();
480 // Should be an array of 'sbyte*'.
481 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
482 if (InitList == 0) return;
484 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
485 const GlobalValue *GV = findGlobalValue(InitList->getOperand(i));
486 if (TAI->emitUsedDirectiveFor(GV, Mang)) {
488 EmitConstantValueOnly(InitList->getOperand(i));
494 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
495 /// function pointers, ignoring the init priority.
496 void AsmPrinter::EmitXXStructorList(Constant *List) {
497 // Should be an array of '{ int, void ()* }' structs. The first value is the
498 // init priority, which we ignore.
499 if (!isa<ConstantArray>(List)) return;
500 ConstantArray *InitList = cast<ConstantArray>(List);
501 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
502 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
503 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
505 if (CS->getOperand(1)->isNullValue())
506 return; // Found a null terminator, exit printing.
507 // Emit the function pointer.
508 EmitGlobalConstant(CS->getOperand(1));
512 /// getGlobalLinkName - Returns the asm/link name of of the specified
513 /// global variable. Should be overridden by each target asm printer to
514 /// generate the appropriate value.
515 const std::string AsmPrinter::getGlobalLinkName(const GlobalVariable *GV) const{
516 std::string LinkName;
518 if (isa<Function>(GV)) {
519 LinkName += TAI->getFunctionAddrPrefix();
520 LinkName += Mang->getValueName(GV);
521 LinkName += TAI->getFunctionAddrSuffix();
523 LinkName += TAI->getGlobalVarAddrPrefix();
524 LinkName += Mang->getValueName(GV);
525 LinkName += TAI->getGlobalVarAddrSuffix();
531 /// EmitExternalGlobal - Emit the external reference to a global variable.
532 /// Should be overridden if an indirect reference should be used.
533 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
534 O << getGlobalLinkName(GV);
539 //===----------------------------------------------------------------------===//
540 /// LEB 128 number encoding.
542 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
543 /// representing an unsigned leb128 value.
544 void AsmPrinter::PrintULEB128(unsigned Value) const {
547 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
549 if (Value) Byte |= 0x80;
550 O << "0x" << utohex_buffer(Byte, Buffer+20);
551 if (Value) O << ", ";
555 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
556 /// representing a signed leb128 value.
557 void AsmPrinter::PrintSLEB128(int Value) const {
558 int Sign = Value >> (8 * sizeof(Value) - 1);
563 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
565 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
566 if (IsMore) Byte |= 0x80;
567 O << "0x" << utohex_buffer(Byte, Buffer+20);
568 if (IsMore) O << ", ";
572 //===--------------------------------------------------------------------===//
573 // Emission and print routines
576 /// PrintHex - Print a value as a hexidecimal value.
578 void AsmPrinter::PrintHex(int Value) const {
580 O << "0x" << utohex_buffer(static_cast<unsigned>(Value), Buffer+20);
583 /// EOL - Print a newline character to asm stream. If a comment is present
584 /// then it will be printed first. Comments should not contain '\n'.
585 void AsmPrinter::EOL() const {
589 void AsmPrinter::EOL(const std::string &Comment) const {
590 if (VerboseAsm && !Comment.empty()) {
592 << TAI->getCommentString()
599 void AsmPrinter::EOL(const char* Comment) const {
600 if (VerboseAsm && *Comment) {
602 << TAI->getCommentString()
609 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
610 /// unsigned leb128 value.
611 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
612 if (TAI->hasLEB128()) {
616 O << TAI->getData8bitsDirective();
621 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
622 /// signed leb128 value.
623 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
624 if (TAI->hasLEB128()) {
628 O << TAI->getData8bitsDirective();
633 /// EmitInt8 - Emit a byte directive and value.
635 void AsmPrinter::EmitInt8(int Value) const {
636 O << TAI->getData8bitsDirective();
637 PrintHex(Value & 0xFF);
640 /// EmitInt16 - Emit a short directive and value.
642 void AsmPrinter::EmitInt16(int Value) const {
643 O << TAI->getData16bitsDirective();
644 PrintHex(Value & 0xFFFF);
647 /// EmitInt32 - Emit a long directive and value.
649 void AsmPrinter::EmitInt32(int Value) const {
650 O << TAI->getData32bitsDirective();
654 /// EmitInt64 - Emit a long long directive and value.
656 void AsmPrinter::EmitInt64(uint64_t Value) const {
657 if (TAI->getData64bitsDirective()) {
658 O << TAI->getData64bitsDirective();
661 if (TM.getTargetData()->isBigEndian()) {
662 EmitInt32(unsigned(Value >> 32)); O << '\n';
663 EmitInt32(unsigned(Value));
665 EmitInt32(unsigned(Value)); O << '\n';
666 EmitInt32(unsigned(Value >> 32));
671 /// toOctal - Convert the low order bits of X into an octal digit.
673 static inline char toOctal(int X) {
677 /// printStringChar - Print a char, escaped if necessary.
679 static void printStringChar(raw_ostream &O, char C) {
682 } else if (C == '\\') {
684 } else if (isprint((unsigned char)C)) {
688 case '\b': O << "\\b"; break;
689 case '\f': O << "\\f"; break;
690 case '\n': O << "\\n"; break;
691 case '\r': O << "\\r"; break;
692 case '\t': O << "\\t"; break;
695 O << toOctal(C >> 6);
696 O << toOctal(C >> 3);
697 O << toOctal(C >> 0);
703 /// EmitString - Emit a string with quotes and a null terminator.
704 /// Special characters are emitted properly.
705 /// \literal (Eg. '\t') \endliteral
706 void AsmPrinter::EmitString(const std::string &String) const {
707 const char* AscizDirective = TAI->getAscizDirective();
711 O << TAI->getAsciiDirective();
713 for (unsigned i = 0, N = String.size(); i < N; ++i) {
714 unsigned char C = String[i];
715 printStringChar(O, C);
724 /// EmitFile - Emit a .file directive.
725 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
726 O << "\t.file\t" << Number << " \"";
727 for (unsigned i = 0, N = Name.size(); i < N; ++i) {
728 unsigned char C = Name[i];
729 printStringChar(O, C);
735 //===----------------------------------------------------------------------===//
737 // EmitAlignment - Emit an alignment directive to the specified power of
738 // two boundary. For example, if you pass in 3 here, you will get an 8
739 // byte alignment. If a global value is specified, and if that global has
740 // an explicit alignment requested, it will unconditionally override the
741 // alignment request. However, if ForcedAlignBits is specified, this value
742 // has final say: the ultimate alignment will be the max of ForcedAlignBits
743 // and the alignment computed with NumBits and the global.
747 // if (GV && GV->hasalignment) Align = GV->getalignment();
748 // Align = std::max(Align, ForcedAlignBits);
750 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
751 unsigned ForcedAlignBits,
752 bool UseFillExpr) const {
753 if (GV && GV->getAlignment())
754 NumBits = Log2_32(GV->getAlignment());
755 NumBits = std::max(NumBits, ForcedAlignBits);
757 if (NumBits == 0) return; // No need to emit alignment.
758 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
759 O << TAI->getAlignDirective() << NumBits;
761 unsigned FillValue = TAI->getTextAlignFillValue();
762 UseFillExpr &= IsInTextSection && FillValue;
771 /// EmitZeros - Emit a block of zeros.
773 void AsmPrinter::EmitZeros(uint64_t NumZeros, unsigned AddrSpace) const {
775 if (TAI->getZeroDirective()) {
776 O << TAI->getZeroDirective() << NumZeros;
777 if (TAI->getZeroDirectiveSuffix())
778 O << TAI->getZeroDirectiveSuffix();
781 for (; NumZeros; --NumZeros)
782 O << TAI->getData8bitsDirective(AddrSpace) << "0\n";
787 // Print out the specified constant, without a storage class. Only the
788 // constants valid in constant expressions can occur here.
789 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
790 if (CV->isNullValue() || isa<UndefValue>(CV))
792 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
793 O << CI->getZExtValue();
794 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
795 // This is a constant address for a global variable or function. Use the
796 // name of the variable or function as the address value, possibly
797 // decorating it with GlobalVarAddrPrefix/Suffix or
798 // FunctionAddrPrefix/Suffix (these all default to "" )
799 if (isa<Function>(GV)) {
800 O << TAI->getFunctionAddrPrefix()
801 << Mang->getValueName(GV)
802 << TAI->getFunctionAddrSuffix();
804 O << TAI->getGlobalVarAddrPrefix()
805 << Mang->getValueName(GV)
806 << TAI->getGlobalVarAddrSuffix();
808 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
809 const TargetData *TD = TM.getTargetData();
810 unsigned Opcode = CE->getOpcode();
812 case Instruction::GetElementPtr: {
813 // generate a symbolic expression for the byte address
814 const Constant *ptrVal = CE->getOperand(0);
815 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
816 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
818 // Truncate/sext the offset to the pointer size.
819 if (TD->getPointerSizeInBits() != 64) {
820 int SExtAmount = 64-TD->getPointerSizeInBits();
821 Offset = (Offset << SExtAmount) >> SExtAmount;
826 EmitConstantValueOnly(ptrVal);
828 O << ") + " << Offset;
830 O << ") - " << -Offset;
832 EmitConstantValueOnly(ptrVal);
836 case Instruction::Trunc:
837 case Instruction::ZExt:
838 case Instruction::SExt:
839 case Instruction::FPTrunc:
840 case Instruction::FPExt:
841 case Instruction::UIToFP:
842 case Instruction::SIToFP:
843 case Instruction::FPToUI:
844 case Instruction::FPToSI:
845 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
847 case Instruction::BitCast:
848 return EmitConstantValueOnly(CE->getOperand(0));
850 case Instruction::IntToPtr: {
851 // Handle casts to pointers by changing them into casts to the appropriate
852 // integer type. This promotes constant folding and simplifies this code.
853 Constant *Op = CE->getOperand(0);
854 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
855 return EmitConstantValueOnly(Op);
859 case Instruction::PtrToInt: {
860 // Support only foldable casts to/from pointers that can be eliminated by
861 // changing the pointer to the appropriately sized integer type.
862 Constant *Op = CE->getOperand(0);
863 const Type *Ty = CE->getType();
865 // We can emit the pointer value into this slot if the slot is an
866 // integer slot greater or equal to the size of the pointer.
867 if (TD->getTypePaddedSize(Ty) >= TD->getTypePaddedSize(Op->getType()))
868 return EmitConstantValueOnly(Op);
871 EmitConstantValueOnly(Op);
872 APInt ptrMask = APInt::getAllOnesValue(TD->getTypePaddedSizeInBits(Ty));
875 ptrMask.toStringUnsigned(S);
876 O << ") & " << S.c_str() << ')';
879 case Instruction::Add:
880 case Instruction::Sub:
881 case Instruction::And:
882 case Instruction::Or:
883 case Instruction::Xor:
885 EmitConstantValueOnly(CE->getOperand(0));
888 case Instruction::Add:
891 case Instruction::Sub:
894 case Instruction::And:
897 case Instruction::Or:
900 case Instruction::Xor:
907 EmitConstantValueOnly(CE->getOperand(1));
911 assert(0 && "Unsupported operator!");
914 assert(0 && "Unknown constant value!");
918 /// printAsCString - Print the specified array as a C compatible string, only if
919 /// the predicate isString is true.
921 static void printAsCString(raw_ostream &O, const ConstantArray *CVA,
923 assert(CVA->isString() && "Array is not string compatible!");
926 for (unsigned i = 0; i != LastElt; ++i) {
928 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
929 printStringChar(O, C);
934 /// EmitString - Emit a zero-byte-terminated string constant.
936 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
937 unsigned NumElts = CVA->getNumOperands();
938 if (TAI->getAscizDirective() && NumElts &&
939 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
940 O << TAI->getAscizDirective();
941 printAsCString(O, CVA, NumElts-1);
943 O << TAI->getAsciiDirective();
944 printAsCString(O, CVA, NumElts);
949 void AsmPrinter::EmitGlobalConstantArray(const ConstantArray *CVA) {
950 if (CVA->isString()) {
952 } else { // Not a string. Print the values in successive locations
953 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
954 EmitGlobalConstant(CVA->getOperand(i));
958 void AsmPrinter::EmitGlobalConstantVector(const ConstantVector *CP) {
959 const VectorType *PTy = CP->getType();
961 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
962 EmitGlobalConstant(CP->getOperand(I));
965 void AsmPrinter::EmitGlobalConstantStruct(const ConstantStruct *CVS,
966 unsigned AddrSpace) {
967 // Print the fields in successive locations. Pad to align if needed!
968 const TargetData *TD = TM.getTargetData();
969 unsigned Size = TD->getTypePaddedSize(CVS->getType());
970 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
971 uint64_t sizeSoFar = 0;
972 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
973 const Constant* field = CVS->getOperand(i);
975 // Check if padding is needed and insert one or more 0s.
976 uint64_t fieldSize = TD->getTypePaddedSize(field->getType());
977 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
978 - cvsLayout->getElementOffset(i)) - fieldSize;
979 sizeSoFar += fieldSize + padSize;
981 // Now print the actual field value.
982 EmitGlobalConstant(field, AddrSpace);
984 // Insert padding - this may include padding to increase the size of the
985 // current field up to the ABI size (if the struct is not packed) as well
986 // as padding to ensure that the next field starts at the right offset.
987 EmitZeros(padSize, AddrSpace);
989 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
990 "Layout of constant struct may be incorrect!");
993 void AsmPrinter::EmitGlobalConstantFP(const ConstantFP *CFP,
994 unsigned AddrSpace) {
995 // FP Constants are printed as integer constants to avoid losing
997 const TargetData *TD = TM.getTargetData();
998 if (CFP->getType() == Type::DoubleTy) {
999 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
1000 uint64_t i = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
1001 if (TAI->getData64bitsDirective(AddrSpace))
1002 O << TAI->getData64bitsDirective(AddrSpace) << i << '\t'
1003 << TAI->getCommentString() << " double value: " << Val << '\n';
1004 else if (TD->isBigEndian()) {
1005 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32)
1006 << '\t' << TAI->getCommentString()
1007 << " double most significant word " << Val << '\n';
1008 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i)
1009 << '\t' << TAI->getCommentString()
1010 << " double least significant word " << Val << '\n';
1012 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i)
1013 << '\t' << TAI->getCommentString()
1014 << " double least significant word " << Val << '\n';
1015 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32)
1016 << '\t' << TAI->getCommentString()
1017 << " double most significant word " << Val << '\n';
1020 } else if (CFP->getType() == Type::FloatTy) {
1021 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
1022 O << TAI->getData32bitsDirective(AddrSpace)
1023 << CFP->getValueAPF().bitcastToAPInt().getZExtValue()
1024 << '\t' << TAI->getCommentString() << " float " << Val << '\n';
1026 } else if (CFP->getType() == Type::X86_FP80Ty) {
1027 // all long double variants are printed as hex
1028 // api needed to prevent premature destruction
1029 APInt api = CFP->getValueAPF().bitcastToAPInt();
1030 const uint64_t *p = api.getRawData();
1031 // Convert to double so we can print the approximate val as a comment.
1032 APFloat DoubleVal = CFP->getValueAPF();
1034 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
1036 if (TD->isBigEndian()) {
1037 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48)
1038 << '\t' << TAI->getCommentString()
1039 << " long double most significant halfword of ~"
1040 << DoubleVal.convertToDouble() << '\n';
1041 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32)
1042 << '\t' << TAI->getCommentString()
1043 << " long double next halfword\n";
1044 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16)
1045 << '\t' << TAI->getCommentString()
1046 << " long double next halfword\n";
1047 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0])
1048 << '\t' << TAI->getCommentString()
1049 << " long double next halfword\n";
1050 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1])
1051 << '\t' << TAI->getCommentString()
1052 << " long double least significant halfword\n";
1054 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1])
1055 << '\t' << TAI->getCommentString()
1056 << " long double least significant halfword of ~"
1057 << DoubleVal.convertToDouble() << '\n';
1058 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0])
1059 << '\t' << TAI->getCommentString()
1060 << " long double next halfword\n";
1061 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16)
1062 << '\t' << TAI->getCommentString()
1063 << " long double next halfword\n";
1064 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32)
1065 << '\t' << TAI->getCommentString()
1066 << " long double next halfword\n";
1067 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48)
1068 << '\t' << TAI->getCommentString()
1069 << " long double most significant halfword\n";
1071 EmitZeros(TD->getTypePaddedSize(Type::X86_FP80Ty) -
1072 TD->getTypeStoreSize(Type::X86_FP80Ty), AddrSpace);
1074 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1075 // all long double variants are printed as hex
1076 // api needed to prevent premature destruction
1077 APInt api = CFP->getValueAPF().bitcastToAPInt();
1078 const uint64_t *p = api.getRawData();
1079 if (TD->isBigEndian()) {
1080 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32)
1081 << '\t' << TAI->getCommentString()
1082 << " long double most significant word\n";
1083 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0])
1084 << '\t' << TAI->getCommentString()
1085 << " long double next word\n";
1086 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32)
1087 << '\t' << TAI->getCommentString()
1088 << " long double next word\n";
1089 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1])
1090 << '\t' << TAI->getCommentString()
1091 << " long double least significant word\n";
1093 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1])
1094 << '\t' << TAI->getCommentString()
1095 << " long double least significant word\n";
1096 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32)
1097 << '\t' << TAI->getCommentString()
1098 << " long double next word\n";
1099 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0])
1100 << '\t' << TAI->getCommentString()
1101 << " long double next word\n";
1102 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32)
1103 << '\t' << TAI->getCommentString()
1104 << " long double most significant word\n";
1107 } else assert(0 && "Floating point constant type not handled");
1110 void AsmPrinter::EmitGlobalConstantLargeInt(const ConstantInt *CI,
1111 unsigned AddrSpace) {
1112 const TargetData *TD = TM.getTargetData();
1113 unsigned BitWidth = CI->getBitWidth();
1114 assert(isPowerOf2_32(BitWidth) &&
1115 "Non-power-of-2-sized integers not handled!");
1117 // We don't expect assemblers to support integer data directives
1118 // for more than 64 bits, so we emit the data in at most 64-bit
1119 // quantities at a time.
1120 const uint64_t *RawData = CI->getValue().getRawData();
1121 for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
1123 if (TD->isBigEndian())
1124 Val = RawData[e - i - 1];
1128 if (TAI->getData64bitsDirective(AddrSpace))
1129 O << TAI->getData64bitsDirective(AddrSpace) << Val << '\n';
1130 else if (TD->isBigEndian()) {
1131 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32)
1132 << '\t' << TAI->getCommentString()
1133 << " Double-word most significant word " << Val << '\n';
1134 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val)
1135 << '\t' << TAI->getCommentString()
1136 << " Double-word least significant word " << Val << '\n';
1138 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val)
1139 << '\t' << TAI->getCommentString()
1140 << " Double-word least significant word " << Val << '\n';
1141 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32)
1142 << '\t' << TAI->getCommentString()
1143 << " Double-word most significant word " << Val << '\n';
1148 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
1149 void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) {
1150 const TargetData *TD = TM.getTargetData();
1151 const Type *type = CV->getType();
1152 unsigned Size = TD->getTypePaddedSize(type);
1154 if (CV->isNullValue() || isa<UndefValue>(CV)) {
1155 EmitZeros(Size, AddrSpace);
1157 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
1158 EmitGlobalConstantArray(CVA);
1160 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
1161 EmitGlobalConstantStruct(CVS, AddrSpace);
1163 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
1164 EmitGlobalConstantFP(CFP, AddrSpace);
1166 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1167 // Small integers are handled below; large integers are handled here.
1169 EmitGlobalConstantLargeInt(CI, AddrSpace);
1172 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1173 EmitGlobalConstantVector(CP);
1177 printDataDirective(type, AddrSpace);
1178 EmitConstantValueOnly(CV);
1179 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1181 CI->getValue().toStringUnsigned(S, 16);
1182 O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
1187 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1188 // Target doesn't support this yet!
1192 /// PrintSpecial - Print information related to the specified machine instr
1193 /// that is independent of the operand, and may be independent of the instr
1194 /// itself. This can be useful for portably encoding the comment character
1195 /// or other bits of target-specific knowledge into the asmstrings. The
1196 /// syntax used is ${:comment}. Targets can override this to add support
1197 /// for their own strange codes.
1198 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) {
1199 if (!strcmp(Code, "private")) {
1200 O << TAI->getPrivateGlobalPrefix();
1201 } else if (!strcmp(Code, "comment")) {
1202 O << TAI->getCommentString();
1203 } else if (!strcmp(Code, "uid")) {
1204 // Assign a unique ID to this machine instruction.
1205 static const MachineInstr *LastMI = 0;
1206 static const Function *F = 0;
1207 static unsigned Counter = 0U-1;
1209 // Comparing the address of MI isn't sufficient, because machineinstrs may
1210 // be allocated to the same address across functions.
1211 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1213 // If this is a new machine instruction, bump the counter.
1214 if (LastMI != MI || F != ThisF) {
1221 cerr << "Unknown special formatter '" << Code
1222 << "' for machine instr: " << *MI;
1228 /// printInlineAsm - This method formats and prints the specified machine
1229 /// instruction that is an inline asm.
1230 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1231 unsigned NumOperands = MI->getNumOperands();
1233 // Count the number of register definitions.
1234 unsigned NumDefs = 0;
1235 for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
1237 assert(NumDefs != NumOperands-1 && "No asm string?");
1239 assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
1241 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1242 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1244 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1245 // These are useful to see where empty asm's wound up.
1246 if (AsmStr[0] == 0) {
1247 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1251 O << TAI->getInlineAsmStart() << "\n\t";
1253 // The variant of the current asmprinter.
1254 int AsmPrinterVariant = TAI->getAssemblerDialect();
1256 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1257 const char *LastEmitted = AsmStr; // One past the last character emitted.
1259 while (*LastEmitted) {
1260 switch (*LastEmitted) {
1262 // Not a special case, emit the string section literally.
1263 const char *LiteralEnd = LastEmitted+1;
1264 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1265 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1267 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1268 O.write(LastEmitted, LiteralEnd-LastEmitted);
1269 LastEmitted = LiteralEnd;
1273 ++LastEmitted; // Consume newline character.
1274 O << '\n'; // Indent code with newline.
1277 ++LastEmitted; // Consume '$' character.
1281 switch (*LastEmitted) {
1282 default: Done = false; break;
1283 case '$': // $$ -> $
1284 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1286 ++LastEmitted; // Consume second '$' character.
1288 case '(': // $( -> same as GCC's { character.
1289 ++LastEmitted; // Consume '(' character.
1290 if (CurVariant != -1) {
1291 cerr << "Nested variants found in inline asm string: '"
1295 CurVariant = 0; // We're in the first variant now.
1298 ++LastEmitted; // consume '|' character.
1299 if (CurVariant == -1)
1300 O << '|'; // this is gcc's behavior for | outside a variant
1302 ++CurVariant; // We're in the next variant.
1304 case ')': // $) -> same as GCC's } char.
1305 ++LastEmitted; // consume ')' character.
1306 if (CurVariant == -1)
1307 O << '}'; // this is gcc's behavior for } outside a variant
1314 bool HasCurlyBraces = false;
1315 if (*LastEmitted == '{') { // ${variable}
1316 ++LastEmitted; // Consume '{' character.
1317 HasCurlyBraces = true;
1320 const char *IDStart = LastEmitted;
1323 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1324 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1325 cerr << "Bad $ operand number in inline asm string: '"
1329 LastEmitted = IDEnd;
1331 char Modifier[2] = { 0, 0 };
1333 if (HasCurlyBraces) {
1334 // If we have curly braces, check for a modifier character. This
1335 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1336 if (*LastEmitted == ':') {
1337 ++LastEmitted; // Consume ':' character.
1338 if (*LastEmitted == 0) {
1339 cerr << "Bad ${:} expression in inline asm string: '"
1344 Modifier[0] = *LastEmitted;
1345 ++LastEmitted; // Consume modifier character.
1348 if (*LastEmitted != '}') {
1349 cerr << "Bad ${} expression in inline asm string: '"
1353 ++LastEmitted; // Consume '}' character.
1356 if ((unsigned)Val >= NumOperands-1) {
1357 cerr << "Invalid $ operand number in inline asm string: '"
1362 // Okay, we finally have a value number. Ask the target to print this
1364 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1369 // Scan to find the machine operand number for the operand.
1370 for (; Val; --Val) {
1371 if (OpNo >= MI->getNumOperands()) break;
1372 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1373 OpNo += (OpFlags >> 3) + 1;
1376 if (OpNo >= MI->getNumOperands()) {
1379 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1380 ++OpNo; // Skip over the ID number.
1382 if (Modifier[0]=='l') // labels are target independent
1383 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1384 false, false, false);
1386 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1387 if ((OpFlags & 7) == 4) {
1388 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1389 Modifier[0] ? Modifier : 0);
1391 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1392 Modifier[0] ? Modifier : 0);
1397 cerr << "Invalid operand found in inline asm: '"
1407 O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1410 /// printImplicitDef - This method prints the specified machine instruction
1411 /// that is an implicit def.
1412 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1413 O << '\t' << TAI->getCommentString() << " implicit-def: "
1414 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1417 /// printLabel - This method prints a local label used by debug and
1418 /// exception handling tables.
1419 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1420 printLabel(MI->getOperand(0).getImm());
1423 void AsmPrinter::printLabel(unsigned Id) const {
1424 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1427 /// printDeclare - This method prints a local variable declaration used by
1429 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1430 /// entry into dwarf table.
1431 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1432 unsigned FI = MI->getOperand(0).getIndex();
1433 GlobalValue *GV = MI->getOperand(1).getGlobal();
1434 DW->RecordVariable(cast<GlobalVariable>(GV), FI);
1437 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1438 /// instruction, using the specified assembler variant. Targets should
1439 /// overried this to format as appropriate.
1440 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1441 unsigned AsmVariant, const char *ExtraCode) {
1442 // Target doesn't support this yet!
1446 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1447 unsigned AsmVariant,
1448 const char *ExtraCode) {
1449 // Target doesn't support this yet!
1453 /// printBasicBlockLabel - This method prints the label for the specified
1454 /// MachineBasicBlock
1455 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1458 bool printComment) const {
1460 unsigned Align = MBB->getAlignment();
1462 EmitAlignment(Log2_32(Align));
1465 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1466 << MBB->getNumber();
1469 if (printComment && MBB->getBasicBlock())
1470 O << '\t' << TAI->getCommentString() << ' '
1471 << MBB->getBasicBlock()->getNameStart();
1474 /// printPICJumpTableSetLabel - This method prints a set label for the
1475 /// specified MachineBasicBlock for a jumptable entry.
1476 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1477 const MachineBasicBlock *MBB) const {
1478 if (!TAI->getSetDirective())
1481 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1482 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1483 printBasicBlockLabel(MBB, false, false, false);
1484 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1485 << '_' << uid << '\n';
1488 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1489 const MachineBasicBlock *MBB) const {
1490 if (!TAI->getSetDirective())
1493 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1494 << getFunctionNumber() << '_' << uid << '_' << uid2
1495 << "_set_" << MBB->getNumber() << ',';
1496 printBasicBlockLabel(MBB, false, false, false);
1497 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1498 << '_' << uid << '_' << uid2 << '\n';
1501 /// printDataDirective - This method prints the asm directive for the
1503 void AsmPrinter::printDataDirective(const Type *type, unsigned AddrSpace) {
1504 const TargetData *TD = TM.getTargetData();
1505 switch (type->getTypeID()) {
1506 case Type::IntegerTyID: {
1507 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1509 O << TAI->getData8bitsDirective(AddrSpace);
1510 else if (BitWidth <= 16)
1511 O << TAI->getData16bitsDirective(AddrSpace);
1512 else if (BitWidth <= 32)
1513 O << TAI->getData32bitsDirective(AddrSpace);
1514 else if (BitWidth <= 64) {
1515 assert(TAI->getData64bitsDirective(AddrSpace) &&
1516 "Target cannot handle 64-bit constant exprs!");
1517 O << TAI->getData64bitsDirective(AddrSpace);
1519 assert(0 && "Target cannot handle given data directive width!");
1523 case Type::PointerTyID:
1524 if (TD->getPointerSize() == 8) {
1525 assert(TAI->getData64bitsDirective(AddrSpace) &&
1526 "Target cannot handle 64-bit pointer exprs!");
1527 O << TAI->getData64bitsDirective(AddrSpace);
1528 } else if (TD->getPointerSize() == 2) {
1529 O << TAI->getData16bitsDirective(AddrSpace);
1530 } else if (TD->getPointerSize() == 1) {
1531 O << TAI->getData8bitsDirective(AddrSpace);
1533 O << TAI->getData32bitsDirective(AddrSpace);
1536 case Type::FloatTyID: case Type::DoubleTyID:
1537 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1538 assert (0 && "Should have already output floating point constant.");
1540 assert (0 && "Can't handle printing this type of thing");
1545 void AsmPrinter::printSuffixedName(const char *Name, const char *Suffix,
1546 const char *Prefix) {
1549 O << TAI->getPrivateGlobalPrefix();
1550 if (Prefix) O << Prefix;
1562 void AsmPrinter::printSuffixedName(const std::string &Name, const char* Suffix) {
1563 printSuffixedName(Name.c_str(), Suffix);
1566 void AsmPrinter::printVisibility(const std::string& Name,
1567 unsigned Visibility) const {
1568 if (Visibility == GlobalValue::HiddenVisibility) {
1569 if (const char *Directive = TAI->getHiddenDirective())
1570 O << Directive << Name << '\n';
1571 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1572 if (const char *Directive = TAI->getProtectedDirective())
1573 O << Directive << Name << '\n';
1577 void AsmPrinter::printOffset(int64_t Offset) const {
1580 else if (Offset < 0)
1584 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
1585 if (!S->usesMetadata())
1588 gcp_iterator GCPI = GCMetadataPrinters.find(S);
1589 if (GCPI != GCMetadataPrinters.end())
1590 return GCPI->second;
1592 const char *Name = S->getName().c_str();
1594 for (GCMetadataPrinterRegistry::iterator
1595 I = GCMetadataPrinterRegistry::begin(),
1596 E = GCMetadataPrinterRegistry::end(); I != E; ++I)
1597 if (strcmp(Name, I->getName()) == 0) {
1598 GCMetadataPrinter *GMP = I->instantiate();
1600 GCMetadataPrinters.insert(std::make_pair(S, GMP));
1604 cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";