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/Analysis/DebugInfo.h"
25 #include "llvm/MC/MCContext.h"
26 #include "llvm/MC/MCStreamer.h"
27 #include "llvm/MC/MCInst.h"
28 #include "llvm/Support/CommandLine.h"
29 #include "llvm/Support/ErrorHandling.h"
30 #include "llvm/Support/FormattedStream.h"
31 #include "llvm/Support/Mangler.h"
32 #include "llvm/Target/TargetAsmInfo.h"
33 #include "llvm/Target/TargetData.h"
34 #include "llvm/Target/TargetLowering.h"
35 #include "llvm/Target/TargetLoweringObjectFile.h"
36 #include "llvm/Target/TargetOptions.h"
37 #include "llvm/Target/TargetRegisterInfo.h"
38 #include "llvm/ADT/SmallPtrSet.h"
39 #include "llvm/ADT/SmallString.h"
40 #include "llvm/ADT/StringExtras.h"
44 static cl::opt<cl::boolOrDefault>
45 AsmVerbose("asm-verbose", cl::desc("Add comments to directives."),
46 cl::init(cl::BOU_UNSET));
48 char AsmPrinter::ID = 0;
49 AsmPrinter::AsmPrinter(formatted_raw_ostream &o, TargetMachine &tm,
50 const TargetAsmInfo *T, bool VDef)
51 : MachineFunctionPass(&ID), FunctionNumber(0), O(o),
52 TM(tm), TAI(T), TRI(tm.getRegisterInfo()),
54 OutContext(*new MCContext()),
55 OutStreamer(*createAsmStreamer(OutContext, O)),
57 IsInTextSection(false), LastMI(0), LastFn(0), Counter(~0U),
58 PrevDLT(0, ~0U, ~0U) {
61 case cl::BOU_UNSET: VerboseAsm = VDef; break;
62 case cl::BOU_TRUE: VerboseAsm = true; break;
63 case cl::BOU_FALSE: VerboseAsm = false; break;
67 AsmPrinter::~AsmPrinter() {
68 for (gcp_iterator I = GCMetadataPrinters.begin(),
69 E = GCMetadataPrinters.end(); I != E; ++I)
76 const TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const {
77 return TM.getTargetLowering()->getObjFileLowering();
81 /// SwitchToTextSection - Switch to the specified text section of the executable
82 /// if we are not already in it!
84 void AsmPrinter::SwitchToTextSection(const char *NewSection,
85 const GlobalValue *GV) {
87 if (GV && GV->hasSection())
88 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
92 // If we're already in this section, we're done.
93 if (CurrentSection == NS) return;
95 // Close the current section, if applicable.
96 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
97 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
101 if (!CurrentSection.empty())
102 O << CurrentSection << TAI->getTextSectionStartSuffix() << '\n';
104 IsInTextSection = true;
107 /// SwitchToDataSection - Switch to the specified data section of the executable
108 /// if we are not already in it!
110 void AsmPrinter::SwitchToDataSection(const char *NewSection,
111 const GlobalValue *GV) {
113 if (GV && GV->hasSection())
114 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
118 // If we're already in this section, we're done.
119 if (CurrentSection == NS) return;
121 // Close the current section, if applicable.
122 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
123 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
127 if (!CurrentSection.empty())
128 O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
130 IsInTextSection = false;
133 /// SwitchToSection - Switch to the specified section of the executable if we
134 /// are not already in it!
135 void AsmPrinter::SwitchToSection(const Section *NS) {
136 const std::string &NewSection = NS->getName();
138 // If we're already in this section, we're done.
139 if (CurrentSection == NewSection) return;
141 // Close the current section, if applicable.
142 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
143 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
145 // FIXME: Make CurrentSection a Section* in the future
146 CurrentSection = NewSection;
147 CurrentSection_ = NS;
149 if (!CurrentSection.empty()) {
150 // If section is named we need to switch into it via special '.section'
151 // directive and also append funky flags. Otherwise - section name is just
152 // some magic assembler directive.
153 if (NS->getKind().hasExplicitSection()) {
154 SmallString<32> FlagsStr;
156 getObjFileLowering().getSectionFlagsAsString(NS->getKind(), FlagsStr);
158 O << TAI->getSwitchToSectionDirective()
164 O << TAI->getDataSectionStartSuffix() << '\n';
167 IsInTextSection = NS->getKind().isText();
170 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
171 MachineFunctionPass::getAnalysisUsage(AU);
172 AU.addRequired<GCModuleInfo>();
175 bool AsmPrinter::doInitialization(Module &M) {
176 Mang = new Mangler(M, TAI->getGlobalPrefix(), TAI->getPrivateGlobalPrefix(),
177 TAI->getLinkerPrivateGlobalPrefix());
179 if (TAI->doesAllowQuotesInName())
180 Mang->setUseQuotes(true);
182 GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
183 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
185 if (TAI->hasSingleParameterDotFile()) {
186 /* Very minimal debug info. It is ignored if we emit actual
187 debug info. If we don't, this at helps the user find where
188 a function came from. */
189 O << "\t.file\t\"" << M.getModuleIdentifier() << "\"\n";
192 for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
193 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
194 MP->beginAssembly(O, *this, *TAI);
196 if (!M.getModuleInlineAsm().empty())
197 O << TAI->getCommentString() << " Start of file scope inline assembly\n"
198 << M.getModuleInlineAsm()
199 << '\n' << TAI->getCommentString()
200 << " End of file scope inline assembly\n";
202 SwitchToDataSection(""); // Reset back to no section.
204 if (TAI->doesSupportDebugInformation() ||
205 TAI->doesSupportExceptionHandling()) {
206 MMI = getAnalysisIfAvailable<MachineModuleInfo>();
208 MMI->AnalyzeModule(M);
209 DW = getAnalysisIfAvailable<DwarfWriter>();
211 DW->BeginModule(&M, MMI, O, this, TAI);
217 bool AsmPrinter::doFinalization(Module &M) {
218 // Emit global variables.
219 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
221 PrintGlobalVariable(I);
223 // Emit final debug information.
224 if (TAI->doesSupportDebugInformation() || TAI->doesSupportExceptionHandling())
227 // If the target wants to know about weak references, print them all.
228 if (TAI->getWeakRefDirective()) {
229 // FIXME: This is not lazy, it would be nice to only print weak references
230 // to stuff that is actually used. Note that doing so would require targets
231 // to notice uses in operands (due to constant exprs etc). This should
232 // happen with the MC stuff eventually.
233 SwitchToDataSection("");
235 // Print out module-level global variables here.
236 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
238 if (I->hasExternalWeakLinkage())
239 O << TAI->getWeakRefDirective() << Mang->getMangledName(I) << '\n';
242 for (Module::const_iterator I = M.begin(), E = M.end();
244 if (I->hasExternalWeakLinkage())
245 O << TAI->getWeakRefDirective() << Mang->getMangledName(I) << '\n';
249 if (TAI->getSetDirective()) {
251 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
253 std::string Name = Mang->getMangledName(I);
255 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
256 std::string Target = Mang->getMangledName(GV);
258 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
259 O << "\t.globl\t" << Name << '\n';
260 else if (I->hasWeakLinkage())
261 O << TAI->getWeakRefDirective() << Name << '\n';
262 else if (!I->hasLocalLinkage())
263 llvm_unreachable("Invalid alias linkage");
265 printVisibility(Name, I->getVisibility());
267 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
271 GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
272 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
273 for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
274 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
275 MP->finishAssembly(O, *this, *TAI);
277 // If we don't have any trampolines, then we don't require stack memory
278 // to be executable. Some targets have a directive to declare this.
279 Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
280 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
281 if (TAI->getNonexecutableStackDirective())
282 O << TAI->getNonexecutableStackDirective() << '\n';
284 delete Mang; Mang = 0;
287 OutStreamer.Finish();
292 AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) const {
293 assert(MF && "No machine function?");
294 return Mang->getMangledName(MF->getFunction(), ".eh",
295 TAI->is_EHSymbolPrivate());
298 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
299 // What's my mangled name?
300 CurrentFnName = Mang->getMangledName(MF.getFunction());
301 IncrementFunctionNumber();
305 // SectionCPs - Keep track the alignment, constpool entries per Section.
309 SmallVector<unsigned, 4> CPEs;
310 SectionCPs(const Section *s, unsigned a) : S(s), Alignment(a) {};
314 /// EmitConstantPool - Print to the current output stream assembly
315 /// representations of the constants in the constant pool MCP. This is
316 /// used to print out constants which have been "spilled to memory" by
317 /// the code generator.
319 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
320 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
321 if (CP.empty()) return;
323 // Calculate sections for constant pool entries. We collect entries to go into
324 // the same section together to reduce amount of section switch statements.
325 SmallVector<SectionCPs, 4> CPSections;
326 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
327 const MachineConstantPoolEntry &CPE = CP[i];
328 unsigned Align = CPE.getAlignment();
331 switch (CPE.getRelocationInfo()) {
332 default: llvm_unreachable("Unknown section kind");
333 case 2: Kind = SectionKind::get(SectionKind::ReadOnlyWithRel, false); break;
335 Kind = SectionKind::get(SectionKind::ReadOnlyWithRelLocal,false);
338 switch (TM.getTargetData()->getTypeAllocSize(CPE.getType())) {
339 case 4: Kind = SectionKind::get(SectionKind::MergeableConst4,false); break;
340 case 8: Kind = SectionKind::get(SectionKind::MergeableConst8,false); break;
341 case 16: Kind = SectionKind::get(SectionKind::MergeableConst16,false);break;
342 default: Kind = SectionKind::get(SectionKind::MergeableConst,false); break;
346 const Section *S =getObjFileLowering().getSectionForMergeableConstant(Kind);
348 // The number of sections are small, just do a linear search from the
349 // last section to the first.
351 unsigned SecIdx = CPSections.size();
352 while (SecIdx != 0) {
353 if (CPSections[--SecIdx].S == S) {
359 SecIdx = CPSections.size();
360 CPSections.push_back(SectionCPs(S, Align));
363 if (Align > CPSections[SecIdx].Alignment)
364 CPSections[SecIdx].Alignment = Align;
365 CPSections[SecIdx].CPEs.push_back(i);
368 // Now print stuff into the calculated sections.
369 for (unsigned i = 0, e = CPSections.size(); i != e; ++i) {
370 SwitchToSection(CPSections[i].S);
371 EmitAlignment(Log2_32(CPSections[i].Alignment));
374 for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) {
375 unsigned CPI = CPSections[i].CPEs[j];
376 MachineConstantPoolEntry CPE = CP[CPI];
378 // Emit inter-object padding for alignment.
379 unsigned AlignMask = CPE.getAlignment() - 1;
380 unsigned NewOffset = (Offset + AlignMask) & ~AlignMask;
381 EmitZeros(NewOffset - Offset);
383 const Type *Ty = CPE.getType();
384 Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty);
386 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
387 << CPI << ":\t\t\t\t\t";
389 O << TAI->getCommentString() << ' ';
390 WriteTypeSymbolic(O, CPE.getType(), 0);
393 if (CPE.isMachineConstantPoolEntry())
394 EmitMachineConstantPoolValue(CPE.Val.MachineCPVal);
396 EmitGlobalConstant(CPE.Val.ConstVal);
401 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
402 /// by the current function to the current output stream.
404 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
405 MachineFunction &MF) {
406 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
407 if (JT.empty()) return;
409 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
411 // Pick the directive to use to print the jump table entries, and switch to
412 // the appropriate section.
413 TargetLowering *LoweringInfo = TM.getTargetLowering();
415 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
416 const Function *F = MF.getFunction();
418 const Section *FuncSection = getObjFileLowering().SectionForGlobal(F, TM);
420 bool JTInDiffSection = false;
421 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
422 !JumpTableDataSection ||
423 FuncSection->getKind().isWeak()) {
424 // In PIC mode, we need to emit the jump table to the same section as the
425 // function body itself, otherwise the label differences won't make sense.
426 // We should also do if the section name is NULL or function is declared in
427 // discardable section.
428 SwitchToSection(FuncSection);
430 SwitchToDataSection(JumpTableDataSection);
431 JTInDiffSection = true;
434 EmitAlignment(Log2_32(MJTI->getAlignment()));
436 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
437 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
439 // If this jump table was deleted, ignore it.
440 if (JTBBs.empty()) continue;
442 // For PIC codegen, if possible we want to use the SetDirective to reduce
443 // the number of relocations the assembler will generate for the jump table.
444 // Set directives are all printed before the jump table itself.
445 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
446 if (TAI->getSetDirective() && IsPic)
447 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
448 if (EmittedSets.insert(JTBBs[ii]))
449 printPICJumpTableSetLabel(i, JTBBs[ii]);
451 // On some targets (e.g. darwin) we want to emit two consequtive labels
452 // before each jump table. The first label is never referenced, but tells
453 // the assembler and linker the extents of the jump table object. The
454 // second label is actually referenced by the code.
455 if (JTInDiffSection) {
456 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
457 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
460 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
461 << '_' << i << ":\n";
463 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
464 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
470 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
471 const MachineBasicBlock *MBB,
472 unsigned uid) const {
473 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
475 // Use JumpTableDirective otherwise honor the entry size from the jump table
477 const char *JTEntryDirective = TAI->getJumpTableDirective();
478 bool HadJTEntryDirective = JTEntryDirective != NULL;
479 if (!HadJTEntryDirective) {
480 JTEntryDirective = MJTI->getEntrySize() == 4 ?
481 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
484 O << JTEntryDirective << ' ';
486 // If we have emitted set directives for the jump table entries, print
487 // them rather than the entries themselves. If we're emitting PIC, then
488 // emit the table entries as differences between two text section labels.
489 // If we're emitting non-PIC code, then emit the entries as direct
490 // references to the target basic blocks.
492 if (TAI->getSetDirective()) {
493 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
494 << '_' << uid << "_set_" << MBB->getNumber();
496 printBasicBlockLabel(MBB, false, false, false);
497 // If the arch uses custom Jump Table directives, don't calc relative to
499 if (!HadJTEntryDirective)
500 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
501 << getFunctionNumber() << '_' << uid;
504 printBasicBlockLabel(MBB, false, false, false);
509 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
510 /// special global used by LLVM. If so, emit it and return true, otherwise
511 /// do nothing and return false.
512 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
513 if (GV->getName() == "llvm.used") {
514 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
515 EmitLLVMUsedList(GV->getInitializer());
519 // Ignore debug and non-emitted data. This handles llvm.compiler.used.
520 if (GV->getSection() == "llvm.metadata" ||
521 GV->hasAvailableExternallyLinkage())
524 if (!GV->hasAppendingLinkage()) return false;
526 assert(GV->hasInitializer() && "Not a special LLVM global!");
528 const TargetData *TD = TM.getTargetData();
529 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
530 if (GV->getName() == "llvm.global_ctors") {
531 SwitchToDataSection(TAI->getStaticCtorsSection());
532 EmitAlignment(Align, 0);
533 EmitXXStructorList(GV->getInitializer());
537 if (GV->getName() == "llvm.global_dtors") {
538 SwitchToDataSection(TAI->getStaticDtorsSection());
539 EmitAlignment(Align, 0);
540 EmitXXStructorList(GV->getInitializer());
547 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
548 /// global in the specified llvm.used list for which emitUsedDirectiveFor
549 /// is true, as being used with this directive.
550 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
551 const char *Directive = TAI->getUsedDirective();
553 // Should be an array of 'i8*'.
554 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
555 if (InitList == 0) return;
557 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
558 const GlobalValue *GV =
559 dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts());
560 if (GV && TAI->emitUsedDirectiveFor(GV, Mang)) {
562 EmitConstantValueOnly(InitList->getOperand(i));
568 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
569 /// function pointers, ignoring the init priority.
570 void AsmPrinter::EmitXXStructorList(Constant *List) {
571 // Should be an array of '{ int, void ()* }' structs. The first value is the
572 // init priority, which we ignore.
573 if (!isa<ConstantArray>(List)) return;
574 ConstantArray *InitList = cast<ConstantArray>(List);
575 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
576 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
577 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
579 if (CS->getOperand(1)->isNullValue())
580 return; // Found a null terminator, exit printing.
581 // Emit the function pointer.
582 EmitGlobalConstant(CS->getOperand(1));
586 /// getGlobalLinkName - Returns the asm/link name of of the specified
587 /// global variable. Should be overridden by each target asm printer to
588 /// generate the appropriate value.
589 const std::string &AsmPrinter::getGlobalLinkName(const GlobalVariable *GV,
590 std::string &LinkName) const {
591 if (isa<Function>(GV)) {
592 LinkName += TAI->getFunctionAddrPrefix();
593 LinkName += Mang->getMangledName(GV);
594 LinkName += TAI->getFunctionAddrSuffix();
596 LinkName += TAI->getGlobalVarAddrPrefix();
597 LinkName += Mang->getMangledName(GV);
598 LinkName += TAI->getGlobalVarAddrSuffix();
604 /// EmitExternalGlobal - Emit the external reference to a global variable.
605 /// Should be overridden if an indirect reference should be used.
606 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
608 O << getGlobalLinkName(GV, GLN);
613 //===----------------------------------------------------------------------===//
614 /// LEB 128 number encoding.
616 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
617 /// representing an unsigned leb128 value.
618 void AsmPrinter::PrintULEB128(unsigned Value) const {
621 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
623 if (Value) Byte |= 0x80;
624 O << "0x" << utohex_buffer(Byte, Buffer+20);
625 if (Value) O << ", ";
629 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
630 /// representing a signed leb128 value.
631 void AsmPrinter::PrintSLEB128(int Value) const {
632 int Sign = Value >> (8 * sizeof(Value) - 1);
637 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
639 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
640 if (IsMore) Byte |= 0x80;
641 O << "0x" << utohex_buffer(Byte, Buffer+20);
642 if (IsMore) O << ", ";
646 //===--------------------------------------------------------------------===//
647 // Emission and print routines
650 /// PrintHex - Print a value as a hexidecimal value.
652 void AsmPrinter::PrintHex(int Value) const {
654 O << "0x" << utohex_buffer(static_cast<unsigned>(Value), Buffer+20);
657 /// EOL - Print a newline character to asm stream. If a comment is present
658 /// then it will be printed first. Comments should not contain '\n'.
659 void AsmPrinter::EOL() const {
663 void AsmPrinter::EOL(const std::string &Comment) const {
664 if (VerboseAsm && !Comment.empty()) {
666 << TAI->getCommentString()
673 void AsmPrinter::EOL(const char* Comment) const {
674 if (VerboseAsm && *Comment) {
676 << TAI->getCommentString()
683 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
684 /// unsigned leb128 value.
685 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
686 if (TAI->hasLEB128()) {
690 O << TAI->getData8bitsDirective();
695 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
696 /// signed leb128 value.
697 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
698 if (TAI->hasLEB128()) {
702 O << TAI->getData8bitsDirective();
707 /// EmitInt8 - Emit a byte directive and value.
709 void AsmPrinter::EmitInt8(int Value) const {
710 O << TAI->getData8bitsDirective();
711 PrintHex(Value & 0xFF);
714 /// EmitInt16 - Emit a short directive and value.
716 void AsmPrinter::EmitInt16(int Value) const {
717 O << TAI->getData16bitsDirective();
718 PrintHex(Value & 0xFFFF);
721 /// EmitInt32 - Emit a long directive and value.
723 void AsmPrinter::EmitInt32(int Value) const {
724 O << TAI->getData32bitsDirective();
728 /// EmitInt64 - Emit a long long directive and value.
730 void AsmPrinter::EmitInt64(uint64_t Value) const {
731 if (TAI->getData64bitsDirective()) {
732 O << TAI->getData64bitsDirective();
735 if (TM.getTargetData()->isBigEndian()) {
736 EmitInt32(unsigned(Value >> 32)); O << '\n';
737 EmitInt32(unsigned(Value));
739 EmitInt32(unsigned(Value)); O << '\n';
740 EmitInt32(unsigned(Value >> 32));
745 /// toOctal - Convert the low order bits of X into an octal digit.
747 static inline char toOctal(int X) {
751 /// printStringChar - Print a char, escaped if necessary.
753 static void printStringChar(formatted_raw_ostream &O, unsigned char C) {
756 } else if (C == '\\') {
758 } else if (isprint((unsigned char)C)) {
762 case '\b': O << "\\b"; break;
763 case '\f': O << "\\f"; break;
764 case '\n': O << "\\n"; break;
765 case '\r': O << "\\r"; break;
766 case '\t': O << "\\t"; break;
769 O << toOctal(C >> 6);
770 O << toOctal(C >> 3);
771 O << toOctal(C >> 0);
777 /// EmitString - Emit a string with quotes and a null terminator.
778 /// Special characters are emitted properly.
779 /// \literal (Eg. '\t') \endliteral
780 void AsmPrinter::EmitString(const std::string &String) const {
781 EmitString(String.c_str(), String.size());
784 void AsmPrinter::EmitString(const char *String, unsigned Size) const {
785 const char* AscizDirective = TAI->getAscizDirective();
789 O << TAI->getAsciiDirective();
791 for (unsigned i = 0; i < Size; ++i)
792 printStringChar(O, String[i]);
800 /// EmitFile - Emit a .file directive.
801 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
802 O << "\t.file\t" << Number << " \"";
803 for (unsigned i = 0, N = Name.size(); i < N; ++i)
804 printStringChar(O, Name[i]);
809 //===----------------------------------------------------------------------===//
811 // EmitAlignment - Emit an alignment directive to the specified power of
812 // two boundary. For example, if you pass in 3 here, you will get an 8
813 // byte alignment. If a global value is specified, and if that global has
814 // an explicit alignment requested, it will unconditionally override the
815 // alignment request. However, if ForcedAlignBits is specified, this value
816 // has final say: the ultimate alignment will be the max of ForcedAlignBits
817 // and the alignment computed with NumBits and the global.
821 // if (GV && GV->hasalignment) Align = GV->getalignment();
822 // Align = std::max(Align, ForcedAlignBits);
824 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
825 unsigned ForcedAlignBits,
826 bool UseFillExpr) const {
827 if (GV && GV->getAlignment())
828 NumBits = Log2_32(GV->getAlignment());
829 NumBits = std::max(NumBits, ForcedAlignBits);
831 if (NumBits == 0) return; // No need to emit alignment.
832 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
833 O << TAI->getAlignDirective() << NumBits;
835 unsigned FillValue = TAI->getTextAlignFillValue();
836 UseFillExpr &= IsInTextSection && FillValue;
845 /// EmitZeros - Emit a block of zeros.
847 void AsmPrinter::EmitZeros(uint64_t NumZeros, unsigned AddrSpace) const {
849 if (TAI->getZeroDirective()) {
850 O << TAI->getZeroDirective() << NumZeros;
851 if (TAI->getZeroDirectiveSuffix())
852 O << TAI->getZeroDirectiveSuffix();
855 for (; NumZeros; --NumZeros)
856 O << TAI->getData8bitsDirective(AddrSpace) << "0\n";
861 // Print out the specified constant, without a storage class. Only the
862 // constants valid in constant expressions can occur here.
863 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
864 if (CV->isNullValue() || isa<UndefValue>(CV))
866 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
867 O << CI->getZExtValue();
868 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
869 // This is a constant address for a global variable or function. Use the
870 // name of the variable or function as the address value, possibly
871 // decorating it with GlobalVarAddrPrefix/Suffix or
872 // FunctionAddrPrefix/Suffix (these all default to "" )
873 if (isa<Function>(GV)) {
874 O << TAI->getFunctionAddrPrefix()
875 << Mang->getMangledName(GV)
876 << TAI->getFunctionAddrSuffix();
878 O << TAI->getGlobalVarAddrPrefix()
879 << Mang->getMangledName(GV)
880 << TAI->getGlobalVarAddrSuffix();
882 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
883 const TargetData *TD = TM.getTargetData();
884 unsigned Opcode = CE->getOpcode();
886 case Instruction::GetElementPtr: {
887 // generate a symbolic expression for the byte address
888 const Constant *ptrVal = CE->getOperand(0);
889 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
890 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
892 // Truncate/sext the offset to the pointer size.
893 if (TD->getPointerSizeInBits() != 64) {
894 int SExtAmount = 64-TD->getPointerSizeInBits();
895 Offset = (Offset << SExtAmount) >> SExtAmount;
900 EmitConstantValueOnly(ptrVal);
902 O << ") + " << Offset;
904 O << ") - " << -Offset;
906 EmitConstantValueOnly(ptrVal);
910 case Instruction::Trunc:
911 case Instruction::ZExt:
912 case Instruction::SExt:
913 case Instruction::FPTrunc:
914 case Instruction::FPExt:
915 case Instruction::UIToFP:
916 case Instruction::SIToFP:
917 case Instruction::FPToUI:
918 case Instruction::FPToSI:
919 llvm_unreachable("FIXME: Don't yet support this kind of constant cast expr");
921 case Instruction::BitCast:
922 return EmitConstantValueOnly(CE->getOperand(0));
924 case Instruction::IntToPtr: {
925 // Handle casts to pointers by changing them into casts to the appropriate
926 // integer type. This promotes constant folding and simplifies this code.
927 Constant *Op = CE->getOperand(0);
928 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
929 return EmitConstantValueOnly(Op);
933 case Instruction::PtrToInt: {
934 // Support only foldable casts to/from pointers that can be eliminated by
935 // changing the pointer to the appropriately sized integer type.
936 Constant *Op = CE->getOperand(0);
937 const Type *Ty = CE->getType();
939 // We can emit the pointer value into this slot if the slot is an
940 // integer slot greater or equal to the size of the pointer.
941 if (TD->getTypeAllocSize(Ty) >= TD->getTypeAllocSize(Op->getType()))
942 return EmitConstantValueOnly(Op);
945 EmitConstantValueOnly(Op);
946 APInt ptrMask = APInt::getAllOnesValue(TD->getTypeAllocSizeInBits(Ty));
949 ptrMask.toStringUnsigned(S);
950 O << ") & " << S.c_str() << ')';
953 case Instruction::Add:
954 case Instruction::Sub:
955 case Instruction::And:
956 case Instruction::Or:
957 case Instruction::Xor:
959 EmitConstantValueOnly(CE->getOperand(0));
962 case Instruction::Add:
965 case Instruction::Sub:
968 case Instruction::And:
971 case Instruction::Or:
974 case Instruction::Xor:
981 EmitConstantValueOnly(CE->getOperand(1));
985 llvm_unreachable("Unsupported operator!");
988 llvm_unreachable("Unknown constant value!");
992 /// printAsCString - Print the specified array as a C compatible string, only if
993 /// the predicate isString is true.
995 static void printAsCString(formatted_raw_ostream &O, const ConstantArray *CVA,
997 assert(CVA->isString() && "Array is not string compatible!");
1000 for (unsigned i = 0; i != LastElt; ++i) {
1002 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
1003 printStringChar(O, C);
1008 /// EmitString - Emit a zero-byte-terminated string constant.
1010 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
1011 unsigned NumElts = CVA->getNumOperands();
1012 if (TAI->getAscizDirective() && NumElts &&
1013 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
1014 O << TAI->getAscizDirective();
1015 printAsCString(O, CVA, NumElts-1);
1017 O << TAI->getAsciiDirective();
1018 printAsCString(O, CVA, NumElts);
1023 void AsmPrinter::EmitGlobalConstantArray(const ConstantArray *CVA,
1024 unsigned AddrSpace) {
1025 if (CVA->isString()) {
1027 } else { // Not a string. Print the values in successive locations
1028 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
1029 EmitGlobalConstant(CVA->getOperand(i), AddrSpace);
1033 void AsmPrinter::EmitGlobalConstantVector(const ConstantVector *CP) {
1034 const VectorType *PTy = CP->getType();
1036 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
1037 EmitGlobalConstant(CP->getOperand(I));
1040 void AsmPrinter::EmitGlobalConstantStruct(const ConstantStruct *CVS,
1041 unsigned AddrSpace) {
1042 // Print the fields in successive locations. Pad to align if needed!
1043 const TargetData *TD = TM.getTargetData();
1044 unsigned Size = TD->getTypeAllocSize(CVS->getType());
1045 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
1046 uint64_t sizeSoFar = 0;
1047 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
1048 const Constant* field = CVS->getOperand(i);
1050 // Check if padding is needed and insert one or more 0s.
1051 uint64_t fieldSize = TD->getTypeAllocSize(field->getType());
1052 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
1053 - cvsLayout->getElementOffset(i)) - fieldSize;
1054 sizeSoFar += fieldSize + padSize;
1056 // Now print the actual field value.
1057 EmitGlobalConstant(field, AddrSpace);
1059 // Insert padding - this may include padding to increase the size of the
1060 // current field up to the ABI size (if the struct is not packed) as well
1061 // as padding to ensure that the next field starts at the right offset.
1062 EmitZeros(padSize, AddrSpace);
1064 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
1065 "Layout of constant struct may be incorrect!");
1068 void AsmPrinter::EmitGlobalConstantFP(const ConstantFP *CFP,
1069 unsigned AddrSpace) {
1070 // FP Constants are printed as integer constants to avoid losing
1072 const TargetData *TD = TM.getTargetData();
1073 if (CFP->getType() == Type::DoubleTy) {
1074 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
1075 uint64_t i = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
1076 if (TAI->getData64bitsDirective(AddrSpace)) {
1077 O << TAI->getData64bitsDirective(AddrSpace) << i;
1079 O << '\t' << TAI->getCommentString() << " double value: " << Val;
1081 } else if (TD->isBigEndian()) {
1082 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
1084 O << '\t' << TAI->getCommentString()
1085 << " double most significant word " << Val;
1087 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
1089 O << '\t' << TAI->getCommentString()
1090 << " double least significant word " << Val;
1093 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
1095 O << '\t' << TAI->getCommentString()
1096 << " double least significant word " << Val;
1098 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
1100 O << '\t' << TAI->getCommentString()
1101 << " double most significant word " << Val;
1105 } else if (CFP->getType() == Type::FloatTy) {
1106 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
1107 O << TAI->getData32bitsDirective(AddrSpace)
1108 << CFP->getValueAPF().bitcastToAPInt().getZExtValue();
1110 O << '\t' << TAI->getCommentString() << " float " << Val;
1113 } else if (CFP->getType() == Type::X86_FP80Ty) {
1114 // all long double variants are printed as hex
1115 // api needed to prevent premature destruction
1116 APInt api = CFP->getValueAPF().bitcastToAPInt();
1117 const uint64_t *p = api.getRawData();
1118 // Convert to double so we can print the approximate val as a comment.
1119 APFloat DoubleVal = CFP->getValueAPF();
1121 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
1123 if (TD->isBigEndian()) {
1124 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
1126 O << '\t' << TAI->getCommentString()
1127 << " long double most significant halfword of ~"
1128 << DoubleVal.convertToDouble();
1130 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
1132 O << '\t' << TAI->getCommentString() << " long double next halfword";
1134 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
1136 O << '\t' << TAI->getCommentString() << " long double next halfword";
1138 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
1140 O << '\t' << TAI->getCommentString() << " long double next halfword";
1142 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
1144 O << '\t' << TAI->getCommentString()
1145 << " long double least significant halfword";
1148 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
1150 O << '\t' << TAI->getCommentString()
1151 << " long double least significant halfword of ~"
1152 << DoubleVal.convertToDouble();
1154 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
1156 O << '\t' << TAI->getCommentString()
1157 << " long double next halfword";
1159 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
1161 O << '\t' << TAI->getCommentString()
1162 << " long double next halfword";
1164 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
1166 O << '\t' << TAI->getCommentString()
1167 << " long double next halfword";
1169 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
1171 O << '\t' << TAI->getCommentString()
1172 << " long double most significant halfword";
1175 EmitZeros(TD->getTypeAllocSize(Type::X86_FP80Ty) -
1176 TD->getTypeStoreSize(Type::X86_FP80Ty), AddrSpace);
1178 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1179 // all long double variants are printed as hex
1180 // api needed to prevent premature destruction
1181 APInt api = CFP->getValueAPF().bitcastToAPInt();
1182 const uint64_t *p = api.getRawData();
1183 if (TD->isBigEndian()) {
1184 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
1186 O << '\t' << TAI->getCommentString()
1187 << " long double most significant word";
1189 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
1191 O << '\t' << TAI->getCommentString()
1192 << " long double next word";
1194 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
1196 O << '\t' << TAI->getCommentString()
1197 << " long double next word";
1199 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
1201 O << '\t' << TAI->getCommentString()
1202 << " long double least significant word";
1205 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
1207 O << '\t' << TAI->getCommentString()
1208 << " long double least significant word";
1210 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
1212 O << '\t' << TAI->getCommentString()
1213 << " long double next word";
1215 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
1217 O << '\t' << TAI->getCommentString()
1218 << " long double next word";
1220 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
1222 O << '\t' << TAI->getCommentString()
1223 << " long double most significant word";
1227 } else llvm_unreachable("Floating point constant type not handled");
1230 void AsmPrinter::EmitGlobalConstantLargeInt(const ConstantInt *CI,
1231 unsigned AddrSpace) {
1232 const TargetData *TD = TM.getTargetData();
1233 unsigned BitWidth = CI->getBitWidth();
1234 assert(isPowerOf2_32(BitWidth) &&
1235 "Non-power-of-2-sized integers not handled!");
1237 // We don't expect assemblers to support integer data directives
1238 // for more than 64 bits, so we emit the data in at most 64-bit
1239 // quantities at a time.
1240 const uint64_t *RawData = CI->getValue().getRawData();
1241 for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
1243 if (TD->isBigEndian())
1244 Val = RawData[e - i - 1];
1248 if (TAI->getData64bitsDirective(AddrSpace))
1249 O << TAI->getData64bitsDirective(AddrSpace) << Val << '\n';
1250 else if (TD->isBigEndian()) {
1251 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
1253 O << '\t' << TAI->getCommentString()
1254 << " Double-word most significant word " << Val;
1256 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
1258 O << '\t' << TAI->getCommentString()
1259 << " Double-word least significant word " << Val;
1262 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
1264 O << '\t' << TAI->getCommentString()
1265 << " Double-word least significant word " << Val;
1267 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
1269 O << '\t' << TAI->getCommentString()
1270 << " Double-word most significant word " << Val;
1276 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
1277 void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) {
1278 const TargetData *TD = TM.getTargetData();
1279 const Type *type = CV->getType();
1280 unsigned Size = TD->getTypeAllocSize(type);
1282 if (CV->isNullValue() || isa<UndefValue>(CV)) {
1283 EmitZeros(Size, AddrSpace);
1285 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
1286 EmitGlobalConstantArray(CVA , AddrSpace);
1288 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
1289 EmitGlobalConstantStruct(CVS, AddrSpace);
1291 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
1292 EmitGlobalConstantFP(CFP, AddrSpace);
1294 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1295 // Small integers are handled below; large integers are handled here.
1297 EmitGlobalConstantLargeInt(CI, AddrSpace);
1300 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1301 EmitGlobalConstantVector(CP);
1305 printDataDirective(type, AddrSpace);
1306 EmitConstantValueOnly(CV);
1308 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1310 CI->getValue().toStringUnsigned(S, 16);
1311 O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
1317 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1318 // Target doesn't support this yet!
1319 llvm_unreachable("Target does not support EmitMachineConstantPoolValue");
1322 /// PrintSpecial - Print information related to the specified machine instr
1323 /// that is independent of the operand, and may be independent of the instr
1324 /// itself. This can be useful for portably encoding the comment character
1325 /// or other bits of target-specific knowledge into the asmstrings. The
1326 /// syntax used is ${:comment}. Targets can override this to add support
1327 /// for their own strange codes.
1328 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) const {
1329 if (!strcmp(Code, "private")) {
1330 O << TAI->getPrivateGlobalPrefix();
1331 } else if (!strcmp(Code, "comment")) {
1333 O << TAI->getCommentString();
1334 } else if (!strcmp(Code, "uid")) {
1335 // Comparing the address of MI isn't sufficient, because machineinstrs may
1336 // be allocated to the same address across functions.
1337 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1339 // If this is a new LastFn instruction, bump the counter.
1340 if (LastMI != MI || LastFn != ThisF) {
1348 raw_string_ostream Msg(msg);
1349 Msg << "Unknown special formatter '" << Code
1350 << "' for machine instr: " << *MI;
1351 llvm_report_error(Msg.str());
1355 /// processDebugLoc - Processes the debug information of each machine
1356 /// instruction's DebugLoc.
1357 void AsmPrinter::processDebugLoc(DebugLoc DL) {
1358 if (TAI->doesSupportDebugInformation() && DW->ShouldEmitDwarfDebug()) {
1359 if (!DL.isUnknown()) {
1360 DebugLocTuple CurDLT = MF->getDebugLocTuple(DL);
1362 if (CurDLT.CompileUnit != 0 && PrevDLT != CurDLT)
1363 printLabel(DW->RecordSourceLine(CurDLT.Line, CurDLT.Col,
1364 DICompileUnit(CurDLT.CompileUnit)));
1371 /// printInlineAsm - This method formats and prints the specified machine
1372 /// instruction that is an inline asm.
1373 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1374 unsigned NumOperands = MI->getNumOperands();
1376 // Count the number of register definitions.
1377 unsigned NumDefs = 0;
1378 for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
1380 assert(NumDefs != NumOperands-1 && "No asm string?");
1382 assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
1384 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1385 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1387 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1388 // These are useful to see where empty asm's wound up.
1389 if (AsmStr[0] == 0) {
1390 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1394 O << TAI->getInlineAsmStart() << "\n\t";
1396 // The variant of the current asmprinter.
1397 int AsmPrinterVariant = TAI->getAssemblerDialect();
1399 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1400 const char *LastEmitted = AsmStr; // One past the last character emitted.
1402 while (*LastEmitted) {
1403 switch (*LastEmitted) {
1405 // Not a special case, emit the string section literally.
1406 const char *LiteralEnd = LastEmitted+1;
1407 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1408 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1410 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1411 O.write(LastEmitted, LiteralEnd-LastEmitted);
1412 LastEmitted = LiteralEnd;
1416 ++LastEmitted; // Consume newline character.
1417 O << '\n'; // Indent code with newline.
1420 ++LastEmitted; // Consume '$' character.
1424 switch (*LastEmitted) {
1425 default: Done = false; break;
1426 case '$': // $$ -> $
1427 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1429 ++LastEmitted; // Consume second '$' character.
1431 case '(': // $( -> same as GCC's { character.
1432 ++LastEmitted; // Consume '(' character.
1433 if (CurVariant != -1) {
1434 llvm_report_error("Nested variants found in inline asm string: '"
1435 + std::string(AsmStr) + "'");
1437 CurVariant = 0; // We're in the first variant now.
1440 ++LastEmitted; // consume '|' character.
1441 if (CurVariant == -1)
1442 O << '|'; // this is gcc's behavior for | outside a variant
1444 ++CurVariant; // We're in the next variant.
1446 case ')': // $) -> same as GCC's } char.
1447 ++LastEmitted; // consume ')' character.
1448 if (CurVariant == -1)
1449 O << '}'; // this is gcc's behavior for } outside a variant
1456 bool HasCurlyBraces = false;
1457 if (*LastEmitted == '{') { // ${variable}
1458 ++LastEmitted; // Consume '{' character.
1459 HasCurlyBraces = true;
1462 // If we have ${:foo}, then this is not a real operand reference, it is a
1463 // "magic" string reference, just like in .td files. Arrange to call
1465 if (HasCurlyBraces && *LastEmitted == ':') {
1467 const char *StrStart = LastEmitted;
1468 const char *StrEnd = strchr(StrStart, '}');
1470 llvm_report_error("Unterminated ${:foo} operand in inline asm string: '"
1471 + std::string(AsmStr) + "'");
1474 std::string Val(StrStart, StrEnd);
1475 PrintSpecial(MI, Val.c_str());
1476 LastEmitted = StrEnd+1;
1480 const char *IDStart = LastEmitted;
1483 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1484 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1485 llvm_report_error("Bad $ operand number in inline asm string: '"
1486 + std::string(AsmStr) + "'");
1488 LastEmitted = IDEnd;
1490 char Modifier[2] = { 0, 0 };
1492 if (HasCurlyBraces) {
1493 // If we have curly braces, check for a modifier character. This
1494 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1495 if (*LastEmitted == ':') {
1496 ++LastEmitted; // Consume ':' character.
1497 if (*LastEmitted == 0) {
1498 llvm_report_error("Bad ${:} expression in inline asm string: '"
1499 + std::string(AsmStr) + "'");
1502 Modifier[0] = *LastEmitted;
1503 ++LastEmitted; // Consume modifier character.
1506 if (*LastEmitted != '}') {
1507 llvm_report_error("Bad ${} expression in inline asm string: '"
1508 + std::string(AsmStr) + "'");
1510 ++LastEmitted; // Consume '}' character.
1513 if ((unsigned)Val >= NumOperands-1) {
1514 llvm_report_error("Invalid $ operand number in inline asm string: '"
1515 + std::string(AsmStr) + "'");
1518 // Okay, we finally have a value number. Ask the target to print this
1520 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1525 // Scan to find the machine operand number for the operand.
1526 for (; Val; --Val) {
1527 if (OpNo >= MI->getNumOperands()) break;
1528 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1529 OpNo += InlineAsm::getNumOperandRegisters(OpFlags) + 1;
1532 if (OpNo >= MI->getNumOperands()) {
1535 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1536 ++OpNo; // Skip over the ID number.
1538 if (Modifier[0]=='l') // labels are target independent
1539 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1540 false, false, false);
1542 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1543 if ((OpFlags & 7) == 4) {
1544 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1545 Modifier[0] ? Modifier : 0);
1547 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1548 Modifier[0] ? Modifier : 0);
1554 raw_string_ostream Msg(msg);
1555 Msg << "Invalid operand found in inline asm: '"
1558 llvm_report_error(Msg.str());
1565 O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1568 /// printImplicitDef - This method prints the specified machine instruction
1569 /// that is an implicit def.
1570 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1572 O << '\t' << TAI->getCommentString() << " implicit-def: "
1573 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1576 /// printLabel - This method prints a local label used by debug and
1577 /// exception handling tables.
1578 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1579 printLabel(MI->getOperand(0).getImm());
1582 void AsmPrinter::printLabel(unsigned Id) const {
1583 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1586 /// printDeclare - This method prints a local variable declaration used by
1588 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1589 /// entry into dwarf table.
1590 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1591 unsigned FI = MI->getOperand(0).getIndex();
1592 GlobalValue *GV = MI->getOperand(1).getGlobal();
1593 DW->RecordVariable(cast<GlobalVariable>(GV), FI, MI);
1596 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1597 /// instruction, using the specified assembler variant. Targets should
1598 /// overried this to format as appropriate.
1599 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1600 unsigned AsmVariant, const char *ExtraCode) {
1601 // Target doesn't support this yet!
1605 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1606 unsigned AsmVariant,
1607 const char *ExtraCode) {
1608 // Target doesn't support this yet!
1612 /// printBasicBlockLabel - This method prints the label for the specified
1613 /// MachineBasicBlock
1614 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1617 bool printComment) const {
1619 unsigned Align = MBB->getAlignment();
1621 EmitAlignment(Log2_32(Align));
1624 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1625 << MBB->getNumber();
1628 if (printComment && MBB->getBasicBlock())
1629 O << '\t' << TAI->getCommentString() << ' '
1630 << MBB->getBasicBlock()->getNameStr();
1633 /// printPICJumpTableSetLabel - This method prints a set label for the
1634 /// specified MachineBasicBlock for a jumptable entry.
1635 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1636 const MachineBasicBlock *MBB) const {
1637 if (!TAI->getSetDirective())
1640 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1641 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1642 printBasicBlockLabel(MBB, false, false, false);
1643 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1644 << '_' << uid << '\n';
1647 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1648 const MachineBasicBlock *MBB) const {
1649 if (!TAI->getSetDirective())
1652 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1653 << getFunctionNumber() << '_' << uid << '_' << uid2
1654 << "_set_" << MBB->getNumber() << ',';
1655 printBasicBlockLabel(MBB, false, false, false);
1656 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1657 << '_' << uid << '_' << uid2 << '\n';
1660 /// printDataDirective - This method prints the asm directive for the
1662 void AsmPrinter::printDataDirective(const Type *type, unsigned AddrSpace) {
1663 const TargetData *TD = TM.getTargetData();
1664 switch (type->getTypeID()) {
1665 case Type::FloatTyID: case Type::DoubleTyID:
1666 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1667 assert(0 && "Should have already output floating point constant.");
1669 assert(0 && "Can't handle printing this type of thing");
1670 case Type::IntegerTyID: {
1671 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1673 O << TAI->getData8bitsDirective(AddrSpace);
1674 else if (BitWidth <= 16)
1675 O << TAI->getData16bitsDirective(AddrSpace);
1676 else if (BitWidth <= 32)
1677 O << TAI->getData32bitsDirective(AddrSpace);
1678 else if (BitWidth <= 64) {
1679 assert(TAI->getData64bitsDirective(AddrSpace) &&
1680 "Target cannot handle 64-bit constant exprs!");
1681 O << TAI->getData64bitsDirective(AddrSpace);
1683 llvm_unreachable("Target cannot handle given data directive width!");
1687 case Type::PointerTyID:
1688 if (TD->getPointerSize() == 8) {
1689 assert(TAI->getData64bitsDirective(AddrSpace) &&
1690 "Target cannot handle 64-bit pointer exprs!");
1691 O << TAI->getData64bitsDirective(AddrSpace);
1692 } else if (TD->getPointerSize() == 2) {
1693 O << TAI->getData16bitsDirective(AddrSpace);
1694 } else if (TD->getPointerSize() == 1) {
1695 O << TAI->getData8bitsDirective(AddrSpace);
1697 O << TAI->getData32bitsDirective(AddrSpace);
1703 void AsmPrinter::printVisibility(const std::string& Name,
1704 unsigned Visibility) const {
1705 if (Visibility == GlobalValue::HiddenVisibility) {
1706 if (const char *Directive = TAI->getHiddenDirective())
1707 O << Directive << Name << '\n';
1708 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1709 if (const char *Directive = TAI->getProtectedDirective())
1710 O << Directive << Name << '\n';
1714 void AsmPrinter::printOffset(int64_t Offset) const {
1717 else if (Offset < 0)
1721 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
1722 if (!S->usesMetadata())
1725 gcp_iterator GCPI = GCMetadataPrinters.find(S);
1726 if (GCPI != GCMetadataPrinters.end())
1727 return GCPI->second;
1729 const char *Name = S->getName().c_str();
1731 for (GCMetadataPrinterRegistry::iterator
1732 I = GCMetadataPrinterRegistry::begin(),
1733 E = GCMetadataPrinterRegistry::end(); I != E; ++I)
1734 if (strcmp(Name, I->getName()) == 0) {
1735 GCMetadataPrinter *GMP = I->instantiate();
1737 GCMetadataPrinters.insert(std::make_pair(S, GMP));
1741 cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";
1742 llvm_unreachable(0);
1745 /// EmitComments - Pretty-print comments for instructions
1746 void AsmPrinter::EmitComments(const MachineInstr &MI) const
1749 if (!MI.getDebugLoc().isUnknown()) {
1750 DebugLocTuple DLT = MF->getDebugLocTuple(MI.getDebugLoc());
1752 // Print source line info
1753 O.PadToColumn(TAI->getCommentColumn(), 1);
1754 O << TAI->getCommentString() << " SrcLine ";
1755 if (DLT.CompileUnit->hasInitializer()) {
1756 Constant *Name = DLT.CompileUnit->getInitializer();
1757 if (ConstantArray *NameString = dyn_cast<ConstantArray>(Name))
1758 if (NameString->isString()) {
1759 O << NameString->getAsString() << " ";
1764 O << ":" << DLT.Col;
1769 /// EmitComments - Pretty-print comments for instructions
1770 void AsmPrinter::EmitComments(const MCInst &MI) const
1773 if (!MI.getDebugLoc().isUnknown()) {
1774 DebugLocTuple DLT = MF->getDebugLocTuple(MI.getDebugLoc());
1776 // Print source line info
1777 O.PadToColumn(TAI->getCommentColumn(), 1);
1778 O << TAI->getCommentString() << " SrcLine ";
1779 if (DLT.CompileUnit->hasInitializer()) {
1780 Constant *Name = DLT.CompileUnit->getInitializer();
1781 if (ConstantArray *NameString = dyn_cast<ConstantArray>(Name))
1782 if (NameString->isString()) {
1783 O << NameString->getAsString() << " ";
1788 O << ":" << DLT.Col;