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/MachineFunction.h"
22 #include "llvm/CodeGen/MachineJumpTableInfo.h"
23 #include "llvm/CodeGen/MachineLoopInfo.h"
24 #include "llvm/CodeGen/MachineModuleInfo.h"
25 #include "llvm/CodeGen/DwarfWriter.h"
26 #include "llvm/Analysis/DebugInfo.h"
27 #include "llvm/MC/MCContext.h"
28 #include "llvm/MC/MCInst.h"
29 #include "llvm/MC/MCSection.h"
30 #include "llvm/MC/MCStreamer.h"
31 #include "llvm/Support/CommandLine.h"
32 #include "llvm/Support/ErrorHandling.h"
33 #include "llvm/Support/FormattedStream.h"
34 #include "llvm/Support/Mangler.h"
35 #include "llvm/MC/MCAsmInfo.h"
36 #include "llvm/Target/TargetData.h"
37 #include "llvm/Target/TargetLowering.h"
38 #include "llvm/Target/TargetLoweringObjectFile.h"
39 #include "llvm/Target/TargetOptions.h"
40 #include "llvm/Target/TargetRegisterInfo.h"
41 #include "llvm/ADT/SmallPtrSet.h"
42 #include "llvm/ADT/SmallString.h"
43 #include "llvm/ADT/StringExtras.h"
47 static cl::opt<cl::boolOrDefault>
48 AsmVerbose("asm-verbose", cl::desc("Add comments to directives."),
49 cl::init(cl::BOU_UNSET));
51 char AsmPrinter::ID = 0;
52 AsmPrinter::AsmPrinter(formatted_raw_ostream &o, TargetMachine &tm,
53 const MCAsmInfo *T, bool VDef)
54 : MachineFunctionPass(&ID), FunctionNumber(0), O(o),
55 TM(tm), MAI(T), TRI(tm.getRegisterInfo()),
57 OutContext(*new MCContext()),
58 OutStreamer(*createAsmStreamer(OutContext, O, *T, this)),
60 LastMI(0), LastFn(0), Counter(~0U),
61 PrevDLT(0, ~0U, ~0U) {
64 case cl::BOU_UNSET: VerboseAsm = VDef; break;
65 case cl::BOU_TRUE: VerboseAsm = true; break;
66 case cl::BOU_FALSE: VerboseAsm = false; break;
70 AsmPrinter::~AsmPrinter() {
71 for (gcp_iterator I = GCMetadataPrinters.begin(),
72 E = GCMetadataPrinters.end(); I != E; ++I)
79 TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const {
80 return TM.getTargetLowering()->getObjFileLowering();
83 /// getCurrentSection() - Return the current section we are emitting to.
84 const MCSection *AsmPrinter::getCurrentSection() const {
85 return OutStreamer.getCurrentSection();
89 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
91 MachineFunctionPass::getAnalysisUsage(AU);
92 AU.addRequired<GCModuleInfo>();
94 AU.addRequired<MachineLoopInfo>();
97 bool AsmPrinter::doInitialization(Module &M) {
98 // Initialize TargetLoweringObjectFile.
99 const_cast<TargetLoweringObjectFile&>(getObjFileLowering())
100 .Initialize(OutContext, TM);
102 Mang = new Mangler(M, MAI->getGlobalPrefix(), MAI->getPrivateGlobalPrefix(),
103 MAI->getLinkerPrivateGlobalPrefix());
105 if (MAI->doesAllowQuotesInName())
106 Mang->setUseQuotes(true);
108 GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
109 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
111 if (MAI->hasSingleParameterDotFile()) {
112 /* Very minimal debug info. It is ignored if we emit actual
113 debug info. If we don't, this at helps the user find where
114 a function came from. */
115 O << "\t.file\t\"" << M.getModuleIdentifier() << "\"\n";
118 for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
119 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
120 MP->beginAssembly(O, *this, *MAI);
122 if (!M.getModuleInlineAsm().empty())
123 O << MAI->getCommentString() << " Start of file scope inline assembly\n"
124 << M.getModuleInlineAsm()
125 << '\n' << MAI->getCommentString()
126 << " End of file scope inline assembly\n";
128 if (MAI->doesSupportDebugInformation() ||
129 MAI->doesSupportExceptionHandling()) {
130 MMI = getAnalysisIfAvailable<MachineModuleInfo>();
132 MMI->AnalyzeModule(M);
133 DW = getAnalysisIfAvailable<DwarfWriter>();
135 DW->BeginModule(&M, MMI, O, this, MAI);
141 bool AsmPrinter::doFinalization(Module &M) {
142 // Emit global variables.
143 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
145 PrintGlobalVariable(I);
147 // Emit final debug information.
148 if (MAI->doesSupportDebugInformation() || MAI->doesSupportExceptionHandling())
151 // If the target wants to know about weak references, print them all.
152 if (MAI->getWeakRefDirective()) {
153 // FIXME: This is not lazy, it would be nice to only print weak references
154 // to stuff that is actually used. Note that doing so would require targets
155 // to notice uses in operands (due to constant exprs etc). This should
156 // happen with the MC stuff eventually.
158 // Print out module-level global variables here.
159 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
161 if (I->hasExternalWeakLinkage())
162 O << MAI->getWeakRefDirective() << Mang->getMangledName(I) << '\n';
165 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
166 if (I->hasExternalWeakLinkage())
167 O << MAI->getWeakRefDirective() << Mang->getMangledName(I) << '\n';
171 if (MAI->getSetDirective()) {
173 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
175 std::string Name = Mang->getMangledName(I);
177 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
178 std::string Target = Mang->getMangledName(GV);
180 if (I->hasExternalLinkage() || !MAI->getWeakRefDirective())
181 O << "\t.globl\t" << Name << '\n';
182 else if (I->hasWeakLinkage())
183 O << MAI->getWeakRefDirective() << Name << '\n';
184 else if (!I->hasLocalLinkage())
185 llvm_unreachable("Invalid alias linkage");
187 printVisibility(Name, I->getVisibility());
189 O << MAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
193 GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
194 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
195 for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
196 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
197 MP->finishAssembly(O, *this, *MAI);
199 // If we don't have any trampolines, then we don't require stack memory
200 // to be executable. Some targets have a directive to declare this.
201 Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
202 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
203 if (MAI->getNonexecutableStackDirective())
204 O << MAI->getNonexecutableStackDirective() << '\n';
206 delete Mang; Mang = 0;
209 OutStreamer.Finish();
214 AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) const {
215 assert(MF && "No machine function?");
216 return Mang->getMangledName(MF->getFunction(), ".eh",
217 MAI->is_EHSymbolPrivate());
220 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
221 // What's my mangled name?
222 CurrentFnName = Mang->getMangledName(MF.getFunction());
223 IncrementFunctionNumber();
226 LI = &getAnalysis<MachineLoopInfo>();
231 // SectionCPs - Keep track the alignment, constpool entries per Section.
235 SmallVector<unsigned, 4> CPEs;
236 SectionCPs(const MCSection *s, unsigned a) : S(s), Alignment(a) {};
240 /// EmitConstantPool - Print to the current output stream assembly
241 /// representations of the constants in the constant pool MCP. This is
242 /// used to print out constants which have been "spilled to memory" by
243 /// the code generator.
245 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
246 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
247 if (CP.empty()) return;
249 // Calculate sections for constant pool entries. We collect entries to go into
250 // the same section together to reduce amount of section switch statements.
251 SmallVector<SectionCPs, 4> CPSections;
252 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
253 const MachineConstantPoolEntry &CPE = CP[i];
254 unsigned Align = CPE.getAlignment();
257 switch (CPE.getRelocationInfo()) {
258 default: llvm_unreachable("Unknown section kind");
259 case 2: Kind = SectionKind::getReadOnlyWithRel(); break;
261 Kind = SectionKind::getReadOnlyWithRelLocal();
264 switch (TM.getTargetData()->getTypeAllocSize(CPE.getType())) {
265 case 4: Kind = SectionKind::getMergeableConst4(); break;
266 case 8: Kind = SectionKind::getMergeableConst8(); break;
267 case 16: Kind = SectionKind::getMergeableConst16();break;
268 default: Kind = SectionKind::getMergeableConst(); break;
272 const MCSection *S = getObjFileLowering().getSectionForConstant(Kind);
274 // The number of sections are small, just do a linear search from the
275 // last section to the first.
277 unsigned SecIdx = CPSections.size();
278 while (SecIdx != 0) {
279 if (CPSections[--SecIdx].S == S) {
285 SecIdx = CPSections.size();
286 CPSections.push_back(SectionCPs(S, Align));
289 if (Align > CPSections[SecIdx].Alignment)
290 CPSections[SecIdx].Alignment = Align;
291 CPSections[SecIdx].CPEs.push_back(i);
294 // Now print stuff into the calculated sections.
295 for (unsigned i = 0, e = CPSections.size(); i != e; ++i) {
296 OutStreamer.SwitchSection(CPSections[i].S);
297 EmitAlignment(Log2_32(CPSections[i].Alignment));
300 for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) {
301 unsigned CPI = CPSections[i].CPEs[j];
302 MachineConstantPoolEntry CPE = CP[CPI];
304 // Emit inter-object padding for alignment.
305 unsigned AlignMask = CPE.getAlignment() - 1;
306 unsigned NewOffset = (Offset + AlignMask) & ~AlignMask;
307 EmitZeros(NewOffset - Offset);
309 const Type *Ty = CPE.getType();
310 Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty);
312 O << MAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
315 O.PadToColumn(MAI->getCommentColumn());
316 O << MAI->getCommentString() << " constant ";
317 WriteTypeSymbolic(O, CPE.getType(), MF->getFunction()->getParent());
320 if (CPE.isMachineConstantPoolEntry())
321 EmitMachineConstantPoolValue(CPE.Val.MachineCPVal);
323 EmitGlobalConstant(CPE.Val.ConstVal);
328 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
329 /// by the current function to the current output stream.
331 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
332 MachineFunction &MF) {
333 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
334 if (JT.empty()) return;
336 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
338 // Pick the directive to use to print the jump table entries, and switch to
339 // the appropriate section.
340 TargetLowering *LoweringInfo = TM.getTargetLowering();
342 const Function *F = MF.getFunction();
343 bool JTInDiffSection = false;
344 if (F->isWeakForLinker() ||
345 (IsPic && !LoweringInfo->usesGlobalOffsetTable())) {
346 // In PIC mode, we need to emit the jump table to the same section as the
347 // function body itself, otherwise the label differences won't make sense.
348 // We should also do if the section name is NULL or function is declared in
349 // discardable section.
350 OutStreamer.SwitchSection(getObjFileLowering().SectionForGlobal(F, Mang,
353 // Otherwise, drop it in the readonly section.
354 const MCSection *ReadOnlySection =
355 getObjFileLowering().getSectionForConstant(SectionKind::getReadOnly());
356 OutStreamer.SwitchSection(ReadOnlySection);
357 JTInDiffSection = true;
360 EmitAlignment(Log2_32(MJTI->getAlignment()));
362 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
363 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
365 // If this jump table was deleted, ignore it.
366 if (JTBBs.empty()) continue;
368 // For PIC codegen, if possible we want to use the SetDirective to reduce
369 // the number of relocations the assembler will generate for the jump table.
370 // Set directives are all printed before the jump table itself.
371 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
372 if (MAI->getSetDirective() && IsPic)
373 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
374 if (EmittedSets.insert(JTBBs[ii]))
375 printPICJumpTableSetLabel(i, JTBBs[ii]);
377 // On some targets (e.g. darwin) we want to emit two consequtive labels
378 // before each jump table. The first label is never referenced, but tells
379 // the assembler and linker the extents of the jump table object. The
380 // second label is actually referenced by the code.
381 if (JTInDiffSection) {
382 if (const char *JTLabelPrefix = MAI->getJumpTableSpecialLabelPrefix())
383 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
386 O << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
387 << '_' << i << ":\n";
389 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
390 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
396 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
397 const MachineBasicBlock *MBB,
398 unsigned uid) const {
399 bool isPIC = TM.getRelocationModel() == Reloc::PIC_;
401 // Use JumpTableDirective otherwise honor the entry size from the jump table
403 const char *JTEntryDirective = MAI->getJumpTableDirective(isPIC);
404 bool HadJTEntryDirective = JTEntryDirective != NULL;
405 if (!HadJTEntryDirective) {
406 JTEntryDirective = MJTI->getEntrySize() == 4 ?
407 MAI->getData32bitsDirective() : MAI->getData64bitsDirective();
410 O << JTEntryDirective << ' ';
412 // If we have emitted set directives for the jump table entries, print
413 // them rather than the entries themselves. If we're emitting PIC, then
414 // emit the table entries as differences between two text section labels.
415 // If we're emitting non-PIC code, then emit the entries as direct
416 // references to the target basic blocks.
418 printBasicBlockLabel(MBB, false, false, false);
419 } else if (MAI->getSetDirective()) {
420 O << MAI->getPrivateGlobalPrefix() << getFunctionNumber()
421 << '_' << uid << "_set_" << MBB->getNumber();
423 printBasicBlockLabel(MBB, false, false, false);
424 // If the arch uses custom Jump Table directives, don't calc relative to
426 if (!HadJTEntryDirective)
427 O << '-' << MAI->getPrivateGlobalPrefix() << "JTI"
428 << getFunctionNumber() << '_' << uid;
433 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
434 /// special global used by LLVM. If so, emit it and return true, otherwise
435 /// do nothing and return false.
436 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
437 if (GV->getName() == "llvm.used") {
438 if (MAI->getUsedDirective() != 0) // No need to emit this at all.
439 EmitLLVMUsedList(GV->getInitializer());
443 // Ignore debug and non-emitted data. This handles llvm.compiler.used.
444 if (GV->getSection() == "llvm.metadata" ||
445 GV->hasAvailableExternallyLinkage())
448 if (!GV->hasAppendingLinkage()) return false;
450 assert(GV->hasInitializer() && "Not a special LLVM global!");
452 const TargetData *TD = TM.getTargetData();
453 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
454 if (GV->getName() == "llvm.global_ctors") {
455 OutStreamer.SwitchSection(getObjFileLowering().getStaticCtorSection());
456 EmitAlignment(Align, 0);
457 EmitXXStructorList(GV->getInitializer());
461 if (GV->getName() == "llvm.global_dtors") {
462 OutStreamer.SwitchSection(getObjFileLowering().getStaticDtorSection());
463 EmitAlignment(Align, 0);
464 EmitXXStructorList(GV->getInitializer());
471 /// EmitLLVMUsedList - For targets that define a MAI::UsedDirective, mark each
472 /// global in the specified llvm.used list for which emitUsedDirectiveFor
473 /// is true, as being used with this directive.
474 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
475 const char *Directive = MAI->getUsedDirective();
477 // Should be an array of 'i8*'.
478 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
479 if (InitList == 0) return;
481 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
482 const GlobalValue *GV =
483 dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts());
484 if (GV && getObjFileLowering().shouldEmitUsedDirectiveFor(GV, Mang)) {
486 EmitConstantValueOnly(InitList->getOperand(i));
492 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
493 /// function pointers, ignoring the init priority.
494 void AsmPrinter::EmitXXStructorList(Constant *List) {
495 // Should be an array of '{ int, void ()* }' structs. The first value is the
496 // init priority, which we ignore.
497 if (!isa<ConstantArray>(List)) return;
498 ConstantArray *InitList = cast<ConstantArray>(List);
499 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
500 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
501 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
503 if (CS->getOperand(1)->isNullValue())
504 return; // Found a null terminator, exit printing.
505 // Emit the function pointer.
506 EmitGlobalConstant(CS->getOperand(1));
510 /// getGlobalLinkName - Returns the asm/link name of of the specified
511 /// global variable. Should be overridden by each target asm printer to
512 /// generate the appropriate value.
513 const std::string &AsmPrinter::getGlobalLinkName(const GlobalVariable *GV,
514 std::string &LinkName) const {
515 if (isa<Function>(GV)) {
516 LinkName += MAI->getFunctionAddrPrefix();
517 LinkName += Mang->getMangledName(GV);
518 LinkName += MAI->getFunctionAddrSuffix();
520 LinkName += MAI->getGlobalVarAddrPrefix();
521 LinkName += Mang->getMangledName(GV);
522 LinkName += MAI->getGlobalVarAddrSuffix();
528 /// EmitExternalGlobal - Emit the external reference to a global variable.
529 /// Should be overridden if an indirect reference should be used.
530 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
532 O << getGlobalLinkName(GV, GLN);
537 //===----------------------------------------------------------------------===//
538 /// LEB 128 number encoding.
540 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
541 /// representing an unsigned leb128 value.
542 void AsmPrinter::PrintULEB128(unsigned Value) const {
545 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
547 if (Value) Byte |= 0x80;
548 O << "0x" << utohex_buffer(Byte, Buffer+20);
549 if (Value) O << ", ";
553 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
554 /// representing a signed leb128 value.
555 void AsmPrinter::PrintSLEB128(int Value) const {
556 int Sign = Value >> (8 * sizeof(Value) - 1);
561 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
563 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
564 if (IsMore) Byte |= 0x80;
565 O << "0x" << utohex_buffer(Byte, Buffer+20);
566 if (IsMore) O << ", ";
570 //===--------------------------------------------------------------------===//
571 // Emission and print routines
574 /// PrintHex - Print a value as a hexidecimal value.
576 void AsmPrinter::PrintHex(int Value) const {
578 O << "0x" << utohex_buffer(static_cast<unsigned>(Value), Buffer+20);
581 /// EOL - Print a newline character to asm stream. If a comment is present
582 /// then it will be printed first. Comments should not contain '\n'.
583 void AsmPrinter::EOL() const {
587 void AsmPrinter::EOL(const std::string &Comment) const {
588 if (VerboseAsm && !Comment.empty()) {
589 O.PadToColumn(MAI->getCommentColumn());
590 O << MAI->getCommentString()
597 void AsmPrinter::EOL(const char* Comment) const {
598 if (VerboseAsm && *Comment) {
599 O.PadToColumn(MAI->getCommentColumn());
600 O << MAI->getCommentString()
607 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
608 /// unsigned leb128 value.
609 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
610 if (MAI->hasLEB128()) {
614 O << MAI->getData8bitsDirective();
619 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
620 /// signed leb128 value.
621 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
622 if (MAI->hasLEB128()) {
626 O << MAI->getData8bitsDirective();
631 /// EmitInt8 - Emit a byte directive and value.
633 void AsmPrinter::EmitInt8(int Value) const {
634 O << MAI->getData8bitsDirective();
635 PrintHex(Value & 0xFF);
638 /// EmitInt16 - Emit a short directive and value.
640 void AsmPrinter::EmitInt16(int Value) const {
641 O << MAI->getData16bitsDirective();
642 PrintHex(Value & 0xFFFF);
645 /// EmitInt32 - Emit a long directive and value.
647 void AsmPrinter::EmitInt32(int Value) const {
648 O << MAI->getData32bitsDirective();
652 /// EmitInt64 - Emit a long long directive and value.
654 void AsmPrinter::EmitInt64(uint64_t Value) const {
655 if (MAI->getData64bitsDirective()) {
656 O << MAI->getData64bitsDirective();
659 if (TM.getTargetData()->isBigEndian()) {
660 EmitInt32(unsigned(Value >> 32)); O << '\n';
661 EmitInt32(unsigned(Value));
663 EmitInt32(unsigned(Value)); O << '\n';
664 EmitInt32(unsigned(Value >> 32));
669 /// toOctal - Convert the low order bits of X into an octal digit.
671 static inline char toOctal(int X) {
675 /// printStringChar - Print a char, escaped if necessary.
677 static void printStringChar(formatted_raw_ostream &O, unsigned char C) {
680 } else if (C == '\\') {
682 } else if (isprint((unsigned char)C)) {
686 case '\b': O << "\\b"; break;
687 case '\f': O << "\\f"; break;
688 case '\n': O << "\\n"; break;
689 case '\r': O << "\\r"; break;
690 case '\t': O << "\\t"; break;
693 O << toOctal(C >> 6);
694 O << toOctal(C >> 3);
695 O << toOctal(C >> 0);
701 /// EmitString - Emit a string with quotes and a null terminator.
702 /// Special characters are emitted properly.
703 /// \literal (Eg. '\t') \endliteral
704 void AsmPrinter::EmitString(const std::string &String) const {
705 EmitString(String.c_str(), String.size());
708 void AsmPrinter::EmitString(const char *String, unsigned Size) const {
709 const char* AscizDirective = MAI->getAscizDirective();
713 O << MAI->getAsciiDirective();
715 for (unsigned i = 0; i < Size; ++i)
716 printStringChar(O, String[i]);
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 printStringChar(O, Name[i]);
733 //===----------------------------------------------------------------------===//
735 // EmitAlignment - Emit an alignment directive to the specified power of
736 // two boundary. For example, if you pass in 3 here, you will get an 8
737 // byte alignment. If a global value is specified, and if that global has
738 // an explicit alignment requested, it will unconditionally override the
739 // alignment request. However, if ForcedAlignBits is specified, this value
740 // has final say: the ultimate alignment will be the max of ForcedAlignBits
741 // and the alignment computed with NumBits and the global.
745 // if (GV && GV->hasalignment) Align = GV->getalignment();
746 // Align = std::max(Align, ForcedAlignBits);
748 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
749 unsigned ForcedAlignBits,
750 bool UseFillExpr) const {
751 if (GV && GV->getAlignment())
752 NumBits = Log2_32(GV->getAlignment());
753 NumBits = std::max(NumBits, ForcedAlignBits);
755 if (NumBits == 0) return; // No need to emit alignment.
757 unsigned FillValue = 0;
758 if (getCurrentSection()->getKind().isText())
759 FillValue = MAI->getTextAlignFillValue();
761 OutStreamer.EmitValueToAlignment(1 << NumBits, FillValue, 1, 0);
764 /// EmitZeros - Emit a block of zeros.
766 void AsmPrinter::EmitZeros(uint64_t NumZeros, unsigned AddrSpace) const {
768 if (MAI->getZeroDirective()) {
769 O << MAI->getZeroDirective() << NumZeros;
770 if (MAI->getZeroDirectiveSuffix())
771 O << MAI->getZeroDirectiveSuffix();
774 for (; NumZeros; --NumZeros)
775 O << MAI->getData8bitsDirective(AddrSpace) << "0\n";
780 // Print out the specified constant, without a storage class. Only the
781 // constants valid in constant expressions can occur here.
782 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
783 if (CV->isNullValue() || isa<UndefValue>(CV))
785 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
786 O << CI->getZExtValue();
787 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
788 // This is a constant address for a global variable or function. Use the
789 // name of the variable or function as the address value, possibly
790 // decorating it with GlobalVarAddrPrefix/Suffix or
791 // FunctionAddrPrefix/Suffix (these all default to "" )
792 if (isa<Function>(GV)) {
793 O << MAI->getFunctionAddrPrefix()
794 << Mang->getMangledName(GV)
795 << MAI->getFunctionAddrSuffix();
797 O << MAI->getGlobalVarAddrPrefix()
798 << Mang->getMangledName(GV)
799 << MAI->getGlobalVarAddrSuffix();
801 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
802 const TargetData *TD = TM.getTargetData();
803 unsigned Opcode = CE->getOpcode();
805 case Instruction::Trunc:
806 case Instruction::ZExt:
807 case Instruction::SExt:
808 case Instruction::FPTrunc:
809 case Instruction::FPExt:
810 case Instruction::UIToFP:
811 case Instruction::SIToFP:
812 case Instruction::FPToUI:
813 case Instruction::FPToSI:
814 llvm_unreachable("FIXME: Don't support this constant cast expr");
815 case Instruction::GetElementPtr: {
816 // generate a symbolic expression for the byte address
817 const Constant *ptrVal = CE->getOperand(0);
818 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
819 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
821 // Truncate/sext the offset to the pointer size.
822 if (TD->getPointerSizeInBits() != 64) {
823 int SExtAmount = 64-TD->getPointerSizeInBits();
824 Offset = (Offset << SExtAmount) >> SExtAmount;
829 EmitConstantValueOnly(ptrVal);
831 O << ") + " << Offset;
833 O << ") - " << -Offset;
835 EmitConstantValueOnly(ptrVal);
839 case Instruction::BitCast:
840 return EmitConstantValueOnly(CE->getOperand(0));
842 case Instruction::IntToPtr: {
843 // Handle casts to pointers by changing them into casts to the appropriate
844 // integer type. This promotes constant folding and simplifies this code.
845 Constant *Op = CE->getOperand(0);
846 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(CV->getContext()),
848 return EmitConstantValueOnly(Op);
852 case Instruction::PtrToInt: {
853 // Support only foldable casts to/from pointers that can be eliminated by
854 // changing the pointer to the appropriately sized integer type.
855 Constant *Op = CE->getOperand(0);
856 const Type *Ty = CE->getType();
858 // We can emit the pointer value into this slot if the slot is an
859 // integer slot greater or equal to the size of the pointer.
860 if (TD->getTypeAllocSize(Ty) == TD->getTypeAllocSize(Op->getType()))
861 return EmitConstantValueOnly(Op);
864 EmitConstantValueOnly(Op);
866 APInt::getAllOnesValue(TD->getTypeAllocSizeInBits(Op->getType()));
869 ptrMask.toStringUnsigned(S);
870 O << ") & " << S.str() << ')';
873 case Instruction::Add:
874 case Instruction::Sub:
875 case Instruction::And:
876 case Instruction::Or:
877 case Instruction::Xor:
879 EmitConstantValueOnly(CE->getOperand(0));
882 case Instruction::Add:
885 case Instruction::Sub:
888 case Instruction::And:
891 case Instruction::Or:
894 case Instruction::Xor:
901 EmitConstantValueOnly(CE->getOperand(1));
905 llvm_unreachable("Unsupported operator!");
908 llvm_unreachable("Unknown constant value!");
912 /// printAsCString - Print the specified array as a C compatible string, only if
913 /// the predicate isString is true.
915 static void printAsCString(formatted_raw_ostream &O, const ConstantArray *CVA,
917 assert(CVA->isString() && "Array is not string compatible!");
920 for (unsigned i = 0; i != LastElt; ++i) {
922 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
923 printStringChar(O, C);
928 /// EmitString - Emit a zero-byte-terminated string constant.
930 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
931 unsigned NumElts = CVA->getNumOperands();
932 if (MAI->getAscizDirective() && NumElts &&
933 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
934 O << MAI->getAscizDirective();
935 printAsCString(O, CVA, NumElts-1);
937 O << MAI->getAsciiDirective();
938 printAsCString(O, CVA, NumElts);
943 void AsmPrinter::EmitGlobalConstantArray(const ConstantArray *CVA,
944 unsigned AddrSpace) {
945 if (CVA->isString()) {
947 } else { // Not a string. Print the values in successive locations
948 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
949 EmitGlobalConstant(CVA->getOperand(i), AddrSpace);
953 void AsmPrinter::EmitGlobalConstantVector(const ConstantVector *CP) {
954 const VectorType *PTy = CP->getType();
956 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
957 EmitGlobalConstant(CP->getOperand(I));
960 void AsmPrinter::EmitGlobalConstantStruct(const ConstantStruct *CVS,
961 unsigned AddrSpace) {
962 // Print the fields in successive locations. Pad to align if needed!
963 const TargetData *TD = TM.getTargetData();
964 unsigned Size = TD->getTypeAllocSize(CVS->getType());
965 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
966 uint64_t sizeSoFar = 0;
967 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
968 const Constant* field = CVS->getOperand(i);
970 // Check if padding is needed and insert one or more 0s.
971 uint64_t fieldSize = TD->getTypeAllocSize(field->getType());
972 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
973 - cvsLayout->getElementOffset(i)) - fieldSize;
974 sizeSoFar += fieldSize + padSize;
976 // Now print the actual field value.
977 EmitGlobalConstant(field, AddrSpace);
979 // Insert padding - this may include padding to increase the size of the
980 // current field up to the ABI size (if the struct is not packed) as well
981 // as padding to ensure that the next field starts at the right offset.
982 EmitZeros(padSize, AddrSpace);
984 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
985 "Layout of constant struct may be incorrect!");
988 void AsmPrinter::EmitGlobalConstantFP(const ConstantFP *CFP,
989 unsigned AddrSpace) {
990 // FP Constants are printed as integer constants to avoid losing
992 LLVMContext &Context = CFP->getContext();
993 const TargetData *TD = TM.getTargetData();
994 if (CFP->getType() == Type::getDoubleTy(Context)) {
995 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
996 uint64_t i = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
997 if (MAI->getData64bitsDirective(AddrSpace)) {
998 O << MAI->getData64bitsDirective(AddrSpace) << i;
1000 O.PadToColumn(MAI->getCommentColumn());
1001 O << MAI->getCommentString() << " double " << Val;
1004 } else if (TD->isBigEndian()) {
1005 O << MAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
1007 O.PadToColumn(MAI->getCommentColumn());
1008 O << MAI->getCommentString()
1009 << " most significant word of double " << Val;
1012 O << MAI->getData32bitsDirective(AddrSpace) << unsigned(i);
1014 O.PadToColumn(MAI->getCommentColumn());
1015 O << MAI->getCommentString()
1016 << " least significant word of double " << Val;
1020 O << MAI->getData32bitsDirective(AddrSpace) << unsigned(i);
1022 O.PadToColumn(MAI->getCommentColumn());
1023 O << MAI->getCommentString()
1024 << " least significant word of double " << Val;
1027 O << MAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
1029 O.PadToColumn(MAI->getCommentColumn());
1030 O << MAI->getCommentString()
1031 << " most significant word of double " << Val;
1036 } else if (CFP->getType() == Type::getFloatTy(Context)) {
1037 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
1038 O << MAI->getData32bitsDirective(AddrSpace)
1039 << CFP->getValueAPF().bitcastToAPInt().getZExtValue();
1041 O.PadToColumn(MAI->getCommentColumn());
1042 O << MAI->getCommentString() << " float " << Val;
1046 } else if (CFP->getType() == Type::getX86_FP80Ty(Context)) {
1047 // all long double variants are printed as hex
1048 // api needed to prevent premature destruction
1049 APInt api = CFP->getValueAPF().bitcastToAPInt();
1050 const uint64_t *p = api.getRawData();
1051 // Convert to double so we can print the approximate val as a comment.
1052 APFloat DoubleVal = CFP->getValueAPF();
1054 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
1056 if (TD->isBigEndian()) {
1057 O << MAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
1059 O.PadToColumn(MAI->getCommentColumn());
1060 O << MAI->getCommentString()
1061 << " most significant halfword of x86_fp80 ~"
1062 << DoubleVal.convertToDouble();
1065 O << MAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
1067 O.PadToColumn(MAI->getCommentColumn());
1068 O << MAI->getCommentString() << " next halfword";
1071 O << MAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
1073 O.PadToColumn(MAI->getCommentColumn());
1074 O << MAI->getCommentString() << " next halfword";
1077 O << MAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
1079 O.PadToColumn(MAI->getCommentColumn());
1080 O << MAI->getCommentString() << " next halfword";
1083 O << MAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
1085 O.PadToColumn(MAI->getCommentColumn());
1086 O << MAI->getCommentString()
1087 << " least significant halfword";
1091 O << MAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
1093 O.PadToColumn(MAI->getCommentColumn());
1094 O << MAI->getCommentString()
1095 << " least significant halfword of x86_fp80 ~"
1096 << DoubleVal.convertToDouble();
1099 O << MAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
1101 O.PadToColumn(MAI->getCommentColumn());
1102 O << MAI->getCommentString()
1103 << " next halfword";
1106 O << MAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
1108 O.PadToColumn(MAI->getCommentColumn());
1109 O << MAI->getCommentString()
1110 << " next halfword";
1113 O << MAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
1115 O.PadToColumn(MAI->getCommentColumn());
1116 O << MAI->getCommentString()
1117 << " next halfword";
1120 O << MAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
1122 O.PadToColumn(MAI->getCommentColumn());
1123 O << MAI->getCommentString()
1124 << " most significant halfword";
1128 EmitZeros(TD->getTypeAllocSize(Type::getX86_FP80Ty(Context)) -
1129 TD->getTypeStoreSize(Type::getX86_FP80Ty(Context)), AddrSpace);
1131 } else if (CFP->getType() == Type::getPPC_FP128Ty(Context)) {
1132 // all long double variants are printed as hex
1133 // api needed to prevent premature destruction
1134 APInt api = CFP->getValueAPF().bitcastToAPInt();
1135 const uint64_t *p = api.getRawData();
1136 if (TD->isBigEndian()) {
1137 O << MAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
1139 O.PadToColumn(MAI->getCommentColumn());
1140 O << MAI->getCommentString()
1141 << " most significant word of ppc_fp128";
1144 O << MAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
1146 O.PadToColumn(MAI->getCommentColumn());
1147 O << MAI->getCommentString()
1151 O << MAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
1153 O.PadToColumn(MAI->getCommentColumn());
1154 O << MAI->getCommentString()
1158 O << MAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
1160 O.PadToColumn(MAI->getCommentColumn());
1161 O << MAI->getCommentString()
1162 << " least significant word";
1166 O << MAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
1168 O.PadToColumn(MAI->getCommentColumn());
1169 O << MAI->getCommentString()
1170 << " least significant word of ppc_fp128";
1173 O << MAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
1175 O.PadToColumn(MAI->getCommentColumn());
1176 O << MAI->getCommentString()
1180 O << MAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
1182 O.PadToColumn(MAI->getCommentColumn());
1183 O << MAI->getCommentString()
1187 O << MAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
1189 O.PadToColumn(MAI->getCommentColumn());
1190 O << MAI->getCommentString()
1191 << " most significant word";
1196 } else llvm_unreachable("Floating point constant type not handled");
1199 void AsmPrinter::EmitGlobalConstantLargeInt(const ConstantInt *CI,
1200 unsigned AddrSpace) {
1201 const TargetData *TD = TM.getTargetData();
1202 unsigned BitWidth = CI->getBitWidth();
1203 assert(isPowerOf2_32(BitWidth) &&
1204 "Non-power-of-2-sized integers not handled!");
1206 // We don't expect assemblers to support integer data directives
1207 // for more than 64 bits, so we emit the data in at most 64-bit
1208 // quantities at a time.
1209 const uint64_t *RawData = CI->getValue().getRawData();
1210 for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
1212 if (TD->isBigEndian())
1213 Val = RawData[e - i - 1];
1217 if (MAI->getData64bitsDirective(AddrSpace))
1218 O << MAI->getData64bitsDirective(AddrSpace) << Val << '\n';
1219 else if (TD->isBigEndian()) {
1220 O << MAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
1222 O.PadToColumn(MAI->getCommentColumn());
1223 O << MAI->getCommentString()
1224 << " most significant half of i64 " << Val;
1227 O << MAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
1229 O.PadToColumn(MAI->getCommentColumn());
1230 O << MAI->getCommentString()
1231 << " least significant half of i64 " << Val;
1235 O << MAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
1237 O.PadToColumn(MAI->getCommentColumn());
1238 O << MAI->getCommentString()
1239 << " least significant half of i64 " << Val;
1242 O << MAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
1244 O.PadToColumn(MAI->getCommentColumn());
1245 O << MAI->getCommentString()
1246 << " most significant half of i64 " << Val;
1253 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
1254 void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) {
1255 const TargetData *TD = TM.getTargetData();
1256 const Type *type = CV->getType();
1257 unsigned Size = TD->getTypeAllocSize(type);
1259 if (CV->isNullValue() || isa<UndefValue>(CV)) {
1260 EmitZeros(Size, AddrSpace);
1262 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
1263 EmitGlobalConstantArray(CVA , AddrSpace);
1265 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
1266 EmitGlobalConstantStruct(CVS, AddrSpace);
1268 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
1269 EmitGlobalConstantFP(CFP, AddrSpace);
1271 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1272 // Small integers are handled below; large integers are handled here.
1274 EmitGlobalConstantLargeInt(CI, AddrSpace);
1277 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1278 EmitGlobalConstantVector(CP);
1282 printDataDirective(type, AddrSpace);
1283 EmitConstantValueOnly(CV);
1285 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1287 CI->getValue().toStringUnsigned(S, 16);
1288 O.PadToColumn(MAI->getCommentColumn());
1289 O << MAI->getCommentString() << " 0x" << S.str();
1295 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1296 // Target doesn't support this yet!
1297 llvm_unreachable("Target does not support EmitMachineConstantPoolValue");
1300 /// PrintSpecial - Print information related to the specified machine instr
1301 /// that is independent of the operand, and may be independent of the instr
1302 /// itself. This can be useful for portably encoding the comment character
1303 /// or other bits of target-specific knowledge into the asmstrings. The
1304 /// syntax used is ${:comment}. Targets can override this to add support
1305 /// for their own strange codes.
1306 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) const {
1307 if (!strcmp(Code, "private")) {
1308 O << MAI->getPrivateGlobalPrefix();
1309 } else if (!strcmp(Code, "comment")) {
1311 O << MAI->getCommentString();
1312 } else if (!strcmp(Code, "uid")) {
1313 // Comparing the address of MI isn't sufficient, because machineinstrs may
1314 // be allocated to the same address across functions.
1315 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1317 // If this is a new LastFn instruction, bump the counter.
1318 if (LastMI != MI || LastFn != ThisF) {
1326 raw_string_ostream Msg(msg);
1327 Msg << "Unknown special formatter '" << Code
1328 << "' for machine instr: " << *MI;
1329 llvm_report_error(Msg.str());
1333 /// processDebugLoc - Processes the debug information of each machine
1334 /// instruction's DebugLoc.
1335 void AsmPrinter::processDebugLoc(DebugLoc DL) {
1339 if (MAI->doesSupportDebugInformation() && DW->ShouldEmitDwarfDebug()) {
1340 if (!DL.isUnknown()) {
1341 DebugLocTuple CurDLT = MF->getDebugLocTuple(DL);
1343 if (CurDLT.CompileUnit != 0 && PrevDLT != CurDLT)
1344 printLabel(DW->RecordSourceLine(CurDLT.Line, CurDLT.Col,
1345 DICompileUnit(CurDLT.CompileUnit)));
1352 /// printInlineAsm - This method formats and prints the specified machine
1353 /// instruction that is an inline asm.
1354 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1355 unsigned NumOperands = MI->getNumOperands();
1357 // Count the number of register definitions.
1358 unsigned NumDefs = 0;
1359 for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
1361 assert(NumDefs != NumOperands-1 && "No asm string?");
1363 assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
1365 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1366 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1368 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1369 // These are useful to see where empty asm's wound up.
1370 if (AsmStr[0] == 0) {
1371 O << MAI->getCommentString() << MAI->getInlineAsmStart() << "\n\t";
1372 O << MAI->getCommentString() << MAI->getInlineAsmEnd() << '\n';
1376 O << MAI->getCommentString() << MAI->getInlineAsmStart() << "\n\t";
1378 // The variant of the current asmprinter.
1379 int AsmPrinterVariant = MAI->getAssemblerDialect();
1381 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1382 const char *LastEmitted = AsmStr; // One past the last character emitted.
1384 while (*LastEmitted) {
1385 switch (*LastEmitted) {
1387 // Not a special case, emit the string section literally.
1388 const char *LiteralEnd = LastEmitted+1;
1389 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1390 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1392 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1393 O.write(LastEmitted, LiteralEnd-LastEmitted);
1394 LastEmitted = LiteralEnd;
1398 ++LastEmitted; // Consume newline character.
1399 O << '\n'; // Indent code with newline.
1402 ++LastEmitted; // Consume '$' character.
1406 switch (*LastEmitted) {
1407 default: Done = false; break;
1408 case '$': // $$ -> $
1409 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1411 ++LastEmitted; // Consume second '$' character.
1413 case '(': // $( -> same as GCC's { character.
1414 ++LastEmitted; // Consume '(' character.
1415 if (CurVariant != -1) {
1416 llvm_report_error("Nested variants found in inline asm string: '"
1417 + std::string(AsmStr) + "'");
1419 CurVariant = 0; // We're in the first variant now.
1422 ++LastEmitted; // consume '|' character.
1423 if (CurVariant == -1)
1424 O << '|'; // this is gcc's behavior for | outside a variant
1426 ++CurVariant; // We're in the next variant.
1428 case ')': // $) -> same as GCC's } char.
1429 ++LastEmitted; // consume ')' character.
1430 if (CurVariant == -1)
1431 O << '}'; // this is gcc's behavior for } outside a variant
1438 bool HasCurlyBraces = false;
1439 if (*LastEmitted == '{') { // ${variable}
1440 ++LastEmitted; // Consume '{' character.
1441 HasCurlyBraces = true;
1444 // If we have ${:foo}, then this is not a real operand reference, it is a
1445 // "magic" string reference, just like in .td files. Arrange to call
1447 if (HasCurlyBraces && *LastEmitted == ':') {
1449 const char *StrStart = LastEmitted;
1450 const char *StrEnd = strchr(StrStart, '}');
1452 llvm_report_error("Unterminated ${:foo} operand in inline asm string: '"
1453 + std::string(AsmStr) + "'");
1456 std::string Val(StrStart, StrEnd);
1457 PrintSpecial(MI, Val.c_str());
1458 LastEmitted = StrEnd+1;
1462 const char *IDStart = LastEmitted;
1465 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1466 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1467 llvm_report_error("Bad $ operand number in inline asm string: '"
1468 + std::string(AsmStr) + "'");
1470 LastEmitted = IDEnd;
1472 char Modifier[2] = { 0, 0 };
1474 if (HasCurlyBraces) {
1475 // If we have curly braces, check for a modifier character. This
1476 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1477 if (*LastEmitted == ':') {
1478 ++LastEmitted; // Consume ':' character.
1479 if (*LastEmitted == 0) {
1480 llvm_report_error("Bad ${:} expression in inline asm string: '"
1481 + std::string(AsmStr) + "'");
1484 Modifier[0] = *LastEmitted;
1485 ++LastEmitted; // Consume modifier character.
1488 if (*LastEmitted != '}') {
1489 llvm_report_error("Bad ${} expression in inline asm string: '"
1490 + std::string(AsmStr) + "'");
1492 ++LastEmitted; // Consume '}' character.
1495 if ((unsigned)Val >= NumOperands-1) {
1496 llvm_report_error("Invalid $ operand number in inline asm string: '"
1497 + std::string(AsmStr) + "'");
1500 // Okay, we finally have a value number. Ask the target to print this
1502 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1507 // Scan to find the machine operand number for the operand.
1508 for (; Val; --Val) {
1509 if (OpNo >= MI->getNumOperands()) break;
1510 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1511 OpNo += InlineAsm::getNumOperandRegisters(OpFlags) + 1;
1514 if (OpNo >= MI->getNumOperands()) {
1517 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1518 ++OpNo; // Skip over the ID number.
1520 if (Modifier[0]=='l') // labels are target independent
1521 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1522 false, false, false);
1524 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1525 if ((OpFlags & 7) == 4) {
1526 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1527 Modifier[0] ? Modifier : 0);
1529 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1530 Modifier[0] ? Modifier : 0);
1536 raw_string_ostream Msg(msg);
1537 Msg << "Invalid operand found in inline asm: '"
1540 llvm_report_error(Msg.str());
1547 O << "\n\t" << MAI->getCommentString() << MAI->getInlineAsmEnd() << '\n';
1550 /// printImplicitDef - This method prints the specified machine instruction
1551 /// that is an implicit def.
1552 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1554 O.PadToColumn(MAI->getCommentColumn());
1555 O << MAI->getCommentString() << " implicit-def: "
1556 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1560 /// printLabel - This method prints a local label used by debug and
1561 /// exception handling tables.
1562 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1563 printLabel(MI->getOperand(0).getImm());
1566 void AsmPrinter::printLabel(unsigned Id) const {
1567 O << MAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1570 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1571 /// instruction, using the specified assembler variant. Targets should
1572 /// overried this to format as appropriate.
1573 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1574 unsigned AsmVariant, const char *ExtraCode) {
1575 // Target doesn't support this yet!
1579 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1580 unsigned AsmVariant,
1581 const char *ExtraCode) {
1582 // Target doesn't support this yet!
1586 /// printBasicBlockLabel - This method prints the label for the specified
1587 /// MachineBasicBlock
1588 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1591 bool printComment) const {
1593 unsigned Align = MBB->getAlignment();
1595 EmitAlignment(Log2_32(Align));
1598 O << MAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1599 << MBB->getNumber();
1603 if (const BasicBlock *BB = MBB->getBasicBlock())
1604 if (BB->hasName()) {
1605 O.PadToColumn(MAI->getCommentColumn());
1606 O << MAI->getCommentString() << ' ';
1607 WriteAsOperand(O, BB, /*PrintType=*/false);
1615 /// printPICJumpTableSetLabel - This method prints a set label for the
1616 /// specified MachineBasicBlock for a jumptable entry.
1617 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1618 const MachineBasicBlock *MBB) const {
1619 if (!MAI->getSetDirective())
1622 O << MAI->getSetDirective() << ' ' << MAI->getPrivateGlobalPrefix()
1623 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1624 printBasicBlockLabel(MBB, false, false, false);
1625 O << '-' << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1626 << '_' << uid << '\n';
1629 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1630 const MachineBasicBlock *MBB) const {
1631 if (!MAI->getSetDirective())
1634 O << MAI->getSetDirective() << ' ' << MAI->getPrivateGlobalPrefix()
1635 << getFunctionNumber() << '_' << uid << '_' << uid2
1636 << "_set_" << MBB->getNumber() << ',';
1637 printBasicBlockLabel(MBB, false, false, false);
1638 O << '-' << MAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1639 << '_' << uid << '_' << uid2 << '\n';
1642 /// printDataDirective - This method prints the asm directive for the
1644 void AsmPrinter::printDataDirective(const Type *type, unsigned AddrSpace) {
1645 const TargetData *TD = TM.getTargetData();
1646 switch (type->getTypeID()) {
1647 case Type::FloatTyID: case Type::DoubleTyID:
1648 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1649 assert(0 && "Should have already output floating point constant.");
1651 assert(0 && "Can't handle printing this type of thing");
1652 case Type::IntegerTyID: {
1653 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1655 O << MAI->getData8bitsDirective(AddrSpace);
1656 else if (BitWidth <= 16)
1657 O << MAI->getData16bitsDirective(AddrSpace);
1658 else if (BitWidth <= 32)
1659 O << MAI->getData32bitsDirective(AddrSpace);
1660 else if (BitWidth <= 64) {
1661 assert(MAI->getData64bitsDirective(AddrSpace) &&
1662 "Target cannot handle 64-bit constant exprs!");
1663 O << MAI->getData64bitsDirective(AddrSpace);
1665 llvm_unreachable("Target cannot handle given data directive width!");
1669 case Type::PointerTyID:
1670 if (TD->getPointerSize() == 8) {
1671 assert(MAI->getData64bitsDirective(AddrSpace) &&
1672 "Target cannot handle 64-bit pointer exprs!");
1673 O << MAI->getData64bitsDirective(AddrSpace);
1674 } else if (TD->getPointerSize() == 2) {
1675 O << MAI->getData16bitsDirective(AddrSpace);
1676 } else if (TD->getPointerSize() == 1) {
1677 O << MAI->getData8bitsDirective(AddrSpace);
1679 O << MAI->getData32bitsDirective(AddrSpace);
1685 void AsmPrinter::printVisibility(const std::string& Name,
1686 unsigned Visibility) const {
1687 if (Visibility == GlobalValue::HiddenVisibility) {
1688 if (const char *Directive = MAI->getHiddenDirective())
1689 O << Directive << Name << '\n';
1690 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1691 if (const char *Directive = MAI->getProtectedDirective())
1692 O << Directive << Name << '\n';
1696 void AsmPrinter::printOffset(int64_t Offset) const {
1699 else if (Offset < 0)
1703 void AsmPrinter::printMCInst(const MCInst *MI) {
1704 llvm_unreachable("MCInst printing unavailable on this target!");
1707 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
1708 if (!S->usesMetadata())
1711 gcp_iterator GCPI = GCMetadataPrinters.find(S);
1712 if (GCPI != GCMetadataPrinters.end())
1713 return GCPI->second;
1715 const char *Name = S->getName().c_str();
1717 for (GCMetadataPrinterRegistry::iterator
1718 I = GCMetadataPrinterRegistry::begin(),
1719 E = GCMetadataPrinterRegistry::end(); I != E; ++I)
1720 if (strcmp(Name, I->getName()) == 0) {
1721 GCMetadataPrinter *GMP = I->instantiate();
1723 GCMetadataPrinters.insert(std::make_pair(S, GMP));
1727 cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";
1728 llvm_unreachable(0);
1731 /// EmitComments - Pretty-print comments for instructions
1732 void AsmPrinter::EmitComments(const MachineInstr &MI) const {
1734 MI.getDebugLoc().isUnknown())
1737 DebugLocTuple DLT = MF->getDebugLocTuple(MI.getDebugLoc());
1739 // Print source line info.
1740 O.PadToColumn(MAI->getCommentColumn());
1741 O << MAI->getCommentString() << " SrcLine ";
1742 if (DLT.CompileUnit->hasInitializer()) {
1743 Constant *Name = DLT.CompileUnit->getInitializer();
1744 if (ConstantArray *NameString = dyn_cast<ConstantArray>(Name))
1745 if (NameString->isString())
1746 O << NameString->getAsString() << " ";
1750 O << ":" << DLT.Col;
1753 /// EmitComments - Pretty-print comments for instructions
1754 void AsmPrinter::EmitComments(const MCInst &MI) const {
1756 MI.getDebugLoc().isUnknown())
1759 DebugLocTuple DLT = MF->getDebugLocTuple(MI.getDebugLoc());
1761 // Print source line info
1762 O.PadToColumn(MAI->getCommentColumn());
1763 O << MAI->getCommentString() << " SrcLine ";
1764 if (DLT.CompileUnit->hasInitializer()) {
1765 Constant *Name = DLT.CompileUnit->getInitializer();
1766 if (ConstantArray *NameString = dyn_cast<ConstantArray>(Name))
1767 if (NameString->isString())
1768 O << NameString->getAsString() << " ";
1772 O << ":" << DLT.Col;
1775 /// PrintChildLoopComment - Print comments about child loops within
1776 /// the loop for this basic block, with nesting.
1778 static void PrintChildLoopComment(formatted_raw_ostream &O,
1779 const MachineLoop *loop,
1780 const MCAsmInfo *MAI,
1781 int FunctionNumber) {
1782 // Add child loop information
1783 for(MachineLoop::iterator cl = loop->begin(),
1784 clend = loop->end();
1787 MachineBasicBlock *Header = (*cl)->getHeader();
1788 assert(Header && "No header for loop");
1791 O.PadToColumn(MAI->getCommentColumn());
1793 O << MAI->getCommentString();
1794 O.indent(((*cl)->getLoopDepth()-1)*2)
1795 << " Child Loop BB" << FunctionNumber << "_"
1796 << Header->getNumber() << " Depth " << (*cl)->getLoopDepth();
1798 PrintChildLoopComment(O, *cl, MAI, FunctionNumber);
1802 /// EmitComments - Pretty-print comments for basic blocks
1803 void AsmPrinter::EmitComments(const MachineBasicBlock &MBB) const
1806 // Add loop depth information
1807 const MachineLoop *loop = LI->getLoopFor(&MBB);
1810 // Print a newline after bb# annotation.
1812 O.PadToColumn(MAI->getCommentColumn());
1813 O << MAI->getCommentString() << " Loop Depth " << loop->getLoopDepth()
1816 O.PadToColumn(MAI->getCommentColumn());
1818 MachineBasicBlock *Header = loop->getHeader();
1819 assert(Header && "No header for loop");
1821 if (Header == &MBB) {
1822 O << MAI->getCommentString() << " Loop Header";
1823 PrintChildLoopComment(O, loop, MAI, getFunctionNumber());
1826 O << MAI->getCommentString() << " Loop Header is BB"
1827 << getFunctionNumber() << "_" << loop->getHeader()->getNumber();
1830 if (loop->empty()) {
1832 O.PadToColumn(MAI->getCommentColumn());
1833 O << MAI->getCommentString() << " Inner Loop";
1836 // Add parent loop information
1837 for (const MachineLoop *CurLoop = loop->getParentLoop();
1839 CurLoop = CurLoop->getParentLoop()) {
1840 MachineBasicBlock *Header = CurLoop->getHeader();
1841 assert(Header && "No header for loop");
1844 O.PadToColumn(MAI->getCommentColumn());
1845 O << MAI->getCommentString();
1846 O.indent((CurLoop->getLoopDepth()-1)*2)
1847 << " Inside Loop BB" << getFunctionNumber() << "_"
1848 << Header->getNumber() << " Depth " << CurLoop->getLoopDepth();