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/MachineLoopInfo.h"
23 #include "llvm/CodeGen/MachineModuleInfo.h"
24 #include "llvm/CodeGen/DwarfWriter.h"
25 #include "llvm/Analysis/DebugInfo.h"
26 #include "llvm/MC/MCContext.h"
27 #include "llvm/MC/MCInst.h"
28 #include "llvm/MC/MCSection.h"
29 #include "llvm/MC/MCStreamer.h"
30 #include "llvm/Support/CommandLine.h"
31 #include "llvm/Support/ErrorHandling.h"
32 #include "llvm/Support/FormattedStream.h"
33 #include "llvm/Support/IOManip.h"
34 #include "llvm/Support/Mangler.h"
35 #include "llvm/Target/TargetAsmInfo.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 static cl::opt<cl::boolOrDefault>
52 AsmExuberant("asm-exuberant", cl::desc("Add many comments."),
53 cl::init(cl::BOU_FALSE));
55 char AsmPrinter::ID = 0;
56 AsmPrinter::AsmPrinter(formatted_raw_ostream &o, TargetMachine &tm,
57 const TargetAsmInfo *T, bool VDef)
58 : MachineFunctionPass(&ID), FunctionNumber(0), O(o),
59 TM(tm), TAI(T), TRI(tm.getRegisterInfo()),
61 OutContext(*new MCContext()),
62 OutStreamer(*createAsmStreamer(OutContext, O)),
64 LastMI(0), LastFn(0), Counter(~0U),
65 PrevDLT(0, ~0U, ~0U) {
69 case cl::BOU_UNSET: VerboseAsm = VDef; break;
70 case cl::BOU_TRUE: VerboseAsm = true; break;
71 case cl::BOU_FALSE: VerboseAsm = false; break;
73 switch (AsmExuberant) {
74 case cl::BOU_UNSET: ExuberantAsm = false; break;
75 case cl::BOU_TRUE: ExuberantAsm = true; break;
76 case cl::BOU_FALSE: ExuberantAsm = false; break;
80 AsmPrinter::~AsmPrinter() {
81 for (gcp_iterator I = GCMetadataPrinters.begin(),
82 E = GCMetadataPrinters.end(); I != E; ++I)
89 TargetLoweringObjectFile &AsmPrinter::getObjFileLowering() const {
90 return TM.getTargetLowering()->getObjFileLowering();
93 /// SwitchToSection - Switch to the specified section of the executable if we
94 /// are not already in it! If "NS" is null, then this causes us to exit the
95 /// current section and not reenter another one. This is generally used for
98 /// FIXME: Remove support for null sections.
100 void AsmPrinter::SwitchToSection(const MCSection *NS) {
101 // If we're already in this section, we're done.
102 if (CurrentSection == NS) return;
108 NS->PrintSwitchToSection(*TAI, O);
111 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
112 AU.setPreservesAll();
113 MachineFunctionPass::getAnalysisUsage(AU);
114 AU.addRequired<GCModuleInfo>();
116 AU.addRequired<MachineLoopInfo>();
120 bool AsmPrinter::doInitialization(Module &M) {
121 // Initialize TargetLoweringObjectFile.
122 const_cast<TargetLoweringObjectFile&>(getObjFileLowering())
123 .Initialize(OutContext, TM);
125 Mang = new Mangler(M, TAI->getGlobalPrefix(), TAI->getPrivateGlobalPrefix(),
126 TAI->getLinkerPrivateGlobalPrefix());
128 if (TAI->doesAllowQuotesInName())
129 Mang->setUseQuotes(true);
131 GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
132 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
134 if (TAI->hasSingleParameterDotFile()) {
135 /* Very minimal debug info. It is ignored if we emit actual
136 debug info. If we don't, this at helps the user find where
137 a function came from. */
138 O << "\t.file\t\"" << M.getModuleIdentifier() << "\"\n";
141 for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
142 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
143 MP->beginAssembly(O, *this, *TAI);
145 if (!M.getModuleInlineAsm().empty())
146 O << TAI->getCommentString() << " Start of file scope inline assembly\n"
147 << M.getModuleInlineAsm()
148 << '\n' << TAI->getCommentString()
149 << " End of file scope inline assembly\n";
151 SwitchToSection(0); // Reset back to no section to close off sections.
153 if (TAI->doesSupportDebugInformation() ||
154 TAI->doesSupportExceptionHandling()) {
155 MMI = getAnalysisIfAvailable<MachineModuleInfo>();
157 MMI->AnalyzeModule(M);
158 DW = getAnalysisIfAvailable<DwarfWriter>();
160 DW->BeginModule(&M, MMI, O, this, TAI);
166 bool AsmPrinter::doFinalization(Module &M) {
167 // Emit global variables.
168 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
170 PrintGlobalVariable(I);
172 // Emit final debug information.
173 if (TAI->doesSupportDebugInformation() || TAI->doesSupportExceptionHandling())
176 // If the target wants to know about weak references, print them all.
177 if (TAI->getWeakRefDirective()) {
178 // FIXME: This is not lazy, it would be nice to only print weak references
179 // to stuff that is actually used. Note that doing so would require targets
180 // to notice uses in operands (due to constant exprs etc). This should
181 // happen with the MC stuff eventually.
184 // Print out module-level global variables here.
185 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
187 if (I->hasExternalWeakLinkage())
188 O << TAI->getWeakRefDirective() << Mang->getMangledName(I) << '\n';
191 for (Module::const_iterator I = M.begin(), E = M.end(); I != E; ++I) {
192 if (I->hasExternalWeakLinkage())
193 O << TAI->getWeakRefDirective() << Mang->getMangledName(I) << '\n';
197 if (TAI->getSetDirective()) {
199 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
201 std::string Name = Mang->getMangledName(I);
203 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
204 std::string Target = Mang->getMangledName(GV);
206 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
207 O << "\t.globl\t" << Name << '\n';
208 else if (I->hasWeakLinkage())
209 O << TAI->getWeakRefDirective() << Name << '\n';
210 else if (!I->hasLocalLinkage())
211 llvm_unreachable("Invalid alias linkage");
213 printVisibility(Name, I->getVisibility());
215 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
219 GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
220 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
221 for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
222 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
223 MP->finishAssembly(O, *this, *TAI);
225 // If we don't have any trampolines, then we don't require stack memory
226 // to be executable. Some targets have a directive to declare this.
227 Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
228 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
229 if (TAI->getNonexecutableStackDirective())
230 O << TAI->getNonexecutableStackDirective() << '\n';
232 delete Mang; Mang = 0;
235 OutStreamer.Finish();
240 AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) const {
241 assert(MF && "No machine function?");
242 return Mang->getMangledName(MF->getFunction(), ".eh",
243 TAI->is_EHSymbolPrivate());
246 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
247 // What's my mangled name?
248 CurrentFnName = Mang->getMangledName(MF.getFunction());
249 IncrementFunctionNumber();
252 LI = &getAnalysis<MachineLoopInfo>();
257 // SectionCPs - Keep track the alignment, constpool entries per Section.
261 SmallVector<unsigned, 4> CPEs;
262 SectionCPs(const MCSection *s, unsigned a) : S(s), Alignment(a) {};
266 /// EmitConstantPool - Print to the current output stream assembly
267 /// representations of the constants in the constant pool MCP. This is
268 /// used to print out constants which have been "spilled to memory" by
269 /// the code generator.
271 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
272 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
273 if (CP.empty()) return;
275 // Calculate sections for constant pool entries. We collect entries to go into
276 // the same section together to reduce amount of section switch statements.
277 SmallVector<SectionCPs, 4> CPSections;
278 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
279 const MachineConstantPoolEntry &CPE = CP[i];
280 unsigned Align = CPE.getAlignment();
283 switch (CPE.getRelocationInfo()) {
284 default: llvm_unreachable("Unknown section kind");
285 case 2: Kind = SectionKind::getReadOnlyWithRel(); break;
287 Kind = SectionKind::getReadOnlyWithRelLocal();
290 switch (TM.getTargetData()->getTypeAllocSize(CPE.getType())) {
291 case 4: Kind = SectionKind::getMergeableConst4(); break;
292 case 8: Kind = SectionKind::getMergeableConst8(); break;
293 case 16: Kind = SectionKind::getMergeableConst16();break;
294 default: Kind = SectionKind::getMergeableConst(); break;
298 const MCSection *S = getObjFileLowering().getSectionForConstant(Kind);
300 // The number of sections are small, just do a linear search from the
301 // last section to the first.
303 unsigned SecIdx = CPSections.size();
304 while (SecIdx != 0) {
305 if (CPSections[--SecIdx].S == S) {
311 SecIdx = CPSections.size();
312 CPSections.push_back(SectionCPs(S, Align));
315 if (Align > CPSections[SecIdx].Alignment)
316 CPSections[SecIdx].Alignment = Align;
317 CPSections[SecIdx].CPEs.push_back(i);
320 // Now print stuff into the calculated sections.
321 for (unsigned i = 0, e = CPSections.size(); i != e; ++i) {
322 SwitchToSection(CPSections[i].S);
323 EmitAlignment(Log2_32(CPSections[i].Alignment));
326 for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) {
327 unsigned CPI = CPSections[i].CPEs[j];
328 MachineConstantPoolEntry CPE = CP[CPI];
330 // Emit inter-object padding for alignment.
331 unsigned AlignMask = CPE.getAlignment() - 1;
332 unsigned NewOffset = (Offset + AlignMask) & ~AlignMask;
333 EmitZeros(NewOffset - Offset);
335 const Type *Ty = CPE.getType();
336 Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty);
338 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
341 O.PadToColumn(TAI->getCommentColumn(), 1);
342 O << TAI->getCommentString() << " constant ";
343 WriteTypeSymbolic(O, CPE.getType(), MF->getFunction()->getParent());
346 if (CPE.isMachineConstantPoolEntry())
347 EmitMachineConstantPoolValue(CPE.Val.MachineCPVal);
349 EmitGlobalConstant(CPE.Val.ConstVal);
354 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
355 /// by the current function to the current output stream.
357 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
358 MachineFunction &MF) {
359 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
360 if (JT.empty()) return;
362 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
364 // Pick the directive to use to print the jump table entries, and switch to
365 // the appropriate section.
366 TargetLowering *LoweringInfo = TM.getTargetLowering();
368 const Function *F = MF.getFunction();
369 bool JTInDiffSection = false;
370 if (F->isWeakForLinker() ||
371 (IsPic && !LoweringInfo->usesGlobalOffsetTable())) {
372 // In PIC mode, we need to emit the jump table to the same section as the
373 // function body itself, otherwise the label differences won't make sense.
374 // We should also do if the section name is NULL or function is declared in
375 // discardable section.
376 SwitchToSection(getObjFileLowering().SectionForGlobal(F, Mang, TM));
378 // Otherwise, drop it in the readonly section.
379 const MCSection *ReadOnlySection =
380 getObjFileLowering().getSectionForConstant(SectionKind::getReadOnly());
381 SwitchToSection(ReadOnlySection);
382 JTInDiffSection = true;
385 EmitAlignment(Log2_32(MJTI->getAlignment()));
387 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
388 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
390 // If this jump table was deleted, ignore it.
391 if (JTBBs.empty()) continue;
393 // For PIC codegen, if possible we want to use the SetDirective to reduce
394 // the number of relocations the assembler will generate for the jump table.
395 // Set directives are all printed before the jump table itself.
396 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
397 if (TAI->getSetDirective() && IsPic)
398 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
399 if (EmittedSets.insert(JTBBs[ii]))
400 printPICJumpTableSetLabel(i, JTBBs[ii]);
402 // On some targets (e.g. darwin) we want to emit two consequtive labels
403 // before each jump table. The first label is never referenced, but tells
404 // the assembler and linker the extents of the jump table object. The
405 // second label is actually referenced by the code.
406 if (JTInDiffSection) {
407 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
408 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
411 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
412 << '_' << i << ":\n";
414 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
415 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
421 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
422 const MachineBasicBlock *MBB,
423 unsigned uid) const {
424 bool isPIC = TM.getRelocationModel() == Reloc::PIC_;
426 // Use JumpTableDirective otherwise honor the entry size from the jump table
428 const char *JTEntryDirective = TAI->getJumpTableDirective(isPIC);
429 bool HadJTEntryDirective = JTEntryDirective != NULL;
430 if (!HadJTEntryDirective) {
431 JTEntryDirective = MJTI->getEntrySize() == 4 ?
432 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
435 O << JTEntryDirective << ' ';
437 // If we have emitted set directives for the jump table entries, print
438 // them rather than the entries themselves. If we're emitting PIC, then
439 // emit the table entries as differences between two text section labels.
440 // If we're emitting non-PIC code, then emit the entries as direct
441 // references to the target basic blocks.
443 printBasicBlockLabel(MBB, false, false, false);
444 } else if (TAI->getSetDirective()) {
445 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
446 << '_' << uid << "_set_" << MBB->getNumber();
448 printBasicBlockLabel(MBB, false, false, false);
449 // If the arch uses custom Jump Table directives, don't calc relative to
451 if (!HadJTEntryDirective)
452 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
453 << getFunctionNumber() << '_' << uid;
458 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
459 /// special global used by LLVM. If so, emit it and return true, otherwise
460 /// do nothing and return false.
461 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
462 if (GV->getName() == "llvm.used") {
463 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
464 EmitLLVMUsedList(GV->getInitializer());
468 // Ignore debug and non-emitted data. This handles llvm.compiler.used.
469 if (GV->getSection() == "llvm.metadata" ||
470 GV->hasAvailableExternallyLinkage())
473 if (!GV->hasAppendingLinkage()) return false;
475 assert(GV->hasInitializer() && "Not a special LLVM global!");
477 const TargetData *TD = TM.getTargetData();
478 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
479 if (GV->getName() == "llvm.global_ctors") {
480 SwitchToSection(getObjFileLowering().getStaticCtorSection());
481 EmitAlignment(Align, 0);
482 EmitXXStructorList(GV->getInitializer());
486 if (GV->getName() == "llvm.global_dtors") {
487 SwitchToSection(getObjFileLowering().getStaticDtorSection());
488 EmitAlignment(Align, 0);
489 EmitXXStructorList(GV->getInitializer());
496 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
497 /// global in the specified llvm.used list for which emitUsedDirectiveFor
498 /// is true, as being used with this directive.
499 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
500 const char *Directive = TAI->getUsedDirective();
502 // Should be an array of 'i8*'.
503 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
504 if (InitList == 0) return;
506 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
507 const GlobalValue *GV =
508 dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts());
509 if (GV && getObjFileLowering().shouldEmitUsedDirectiveFor(GV, Mang)) {
511 EmitConstantValueOnly(InitList->getOperand(i));
517 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
518 /// function pointers, ignoring the init priority.
519 void AsmPrinter::EmitXXStructorList(Constant *List) {
520 // Should be an array of '{ int, void ()* }' structs. The first value is the
521 // init priority, which we ignore.
522 if (!isa<ConstantArray>(List)) return;
523 ConstantArray *InitList = cast<ConstantArray>(List);
524 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
525 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
526 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
528 if (CS->getOperand(1)->isNullValue())
529 return; // Found a null terminator, exit printing.
530 // Emit the function pointer.
531 EmitGlobalConstant(CS->getOperand(1));
535 /// getGlobalLinkName - Returns the asm/link name of of the specified
536 /// global variable. Should be overridden by each target asm printer to
537 /// generate the appropriate value.
538 const std::string &AsmPrinter::getGlobalLinkName(const GlobalVariable *GV,
539 std::string &LinkName) const {
540 if (isa<Function>(GV)) {
541 LinkName += TAI->getFunctionAddrPrefix();
542 LinkName += Mang->getMangledName(GV);
543 LinkName += TAI->getFunctionAddrSuffix();
545 LinkName += TAI->getGlobalVarAddrPrefix();
546 LinkName += Mang->getMangledName(GV);
547 LinkName += TAI->getGlobalVarAddrSuffix();
553 /// EmitExternalGlobal - Emit the external reference to a global variable.
554 /// Should be overridden if an indirect reference should be used.
555 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
557 O << getGlobalLinkName(GV, GLN);
562 //===----------------------------------------------------------------------===//
563 /// LEB 128 number encoding.
565 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
566 /// representing an unsigned leb128 value.
567 void AsmPrinter::PrintULEB128(unsigned Value) const {
570 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
572 if (Value) Byte |= 0x80;
573 O << "0x" << utohex_buffer(Byte, Buffer+20);
574 if (Value) O << ", ";
578 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
579 /// representing a signed leb128 value.
580 void AsmPrinter::PrintSLEB128(int Value) const {
581 int Sign = Value >> (8 * sizeof(Value) - 1);
586 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
588 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
589 if (IsMore) Byte |= 0x80;
590 O << "0x" << utohex_buffer(Byte, Buffer+20);
591 if (IsMore) O << ", ";
595 //===--------------------------------------------------------------------===//
596 // Emission and print routines
599 /// PrintHex - Print a value as a hexidecimal value.
601 void AsmPrinter::PrintHex(int Value) const {
603 O << "0x" << utohex_buffer(static_cast<unsigned>(Value), Buffer+20);
606 /// EOL - Print a newline character to asm stream. If a comment is present
607 /// then it will be printed first. Comments should not contain '\n'.
608 void AsmPrinter::EOL() const {
612 void AsmPrinter::EOL(const std::string &Comment) const {
613 if (VerboseAsm && !Comment.empty()) {
614 O.PadToColumn(TAI->getCommentColumn(), 1);
615 O << TAI->getCommentString()
622 void AsmPrinter::EOL(const char* Comment) const {
623 if (VerboseAsm && *Comment) {
624 O.PadToColumn(TAI->getCommentColumn(), 1);
625 O << TAI->getCommentString()
632 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
633 /// unsigned leb128 value.
634 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
635 if (TAI->hasLEB128()) {
639 O << TAI->getData8bitsDirective();
644 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
645 /// signed leb128 value.
646 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
647 if (TAI->hasLEB128()) {
651 O << TAI->getData8bitsDirective();
656 /// EmitInt8 - Emit a byte directive and value.
658 void AsmPrinter::EmitInt8(int Value) const {
659 O << TAI->getData8bitsDirective();
660 PrintHex(Value & 0xFF);
663 /// EmitInt16 - Emit a short directive and value.
665 void AsmPrinter::EmitInt16(int Value) const {
666 O << TAI->getData16bitsDirective();
667 PrintHex(Value & 0xFFFF);
670 /// EmitInt32 - Emit a long directive and value.
672 void AsmPrinter::EmitInt32(int Value) const {
673 O << TAI->getData32bitsDirective();
677 /// EmitInt64 - Emit a long long directive and value.
679 void AsmPrinter::EmitInt64(uint64_t Value) const {
680 if (TAI->getData64bitsDirective()) {
681 O << TAI->getData64bitsDirective();
684 if (TM.getTargetData()->isBigEndian()) {
685 EmitInt32(unsigned(Value >> 32)); O << '\n';
686 EmitInt32(unsigned(Value));
688 EmitInt32(unsigned(Value)); O << '\n';
689 EmitInt32(unsigned(Value >> 32));
694 /// toOctal - Convert the low order bits of X into an octal digit.
696 static inline char toOctal(int X) {
700 /// printStringChar - Print a char, escaped if necessary.
702 static void printStringChar(formatted_raw_ostream &O, unsigned char C) {
705 } else if (C == '\\') {
707 } else if (isprint((unsigned char)C)) {
711 case '\b': O << "\\b"; break;
712 case '\f': O << "\\f"; break;
713 case '\n': O << "\\n"; break;
714 case '\r': O << "\\r"; break;
715 case '\t': O << "\\t"; break;
718 O << toOctal(C >> 6);
719 O << toOctal(C >> 3);
720 O << toOctal(C >> 0);
726 /// EmitString - Emit a string with quotes and a null terminator.
727 /// Special characters are emitted properly.
728 /// \literal (Eg. '\t') \endliteral
729 void AsmPrinter::EmitString(const std::string &String) const {
730 EmitString(String.c_str(), String.size());
733 void AsmPrinter::EmitString(const char *String, unsigned Size) const {
734 const char* AscizDirective = TAI->getAscizDirective();
738 O << TAI->getAsciiDirective();
740 for (unsigned i = 0; i < Size; ++i)
741 printStringChar(O, String[i]);
749 /// EmitFile - Emit a .file directive.
750 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
751 O << "\t.file\t" << Number << " \"";
752 for (unsigned i = 0, N = Name.size(); i < N; ++i)
753 printStringChar(O, Name[i]);
758 //===----------------------------------------------------------------------===//
760 // EmitAlignment - Emit an alignment directive to the specified power of
761 // two boundary. For example, if you pass in 3 here, you will get an 8
762 // byte alignment. If a global value is specified, and if that global has
763 // an explicit alignment requested, it will unconditionally override the
764 // alignment request. However, if ForcedAlignBits is specified, this value
765 // has final say: the ultimate alignment will be the max of ForcedAlignBits
766 // and the alignment computed with NumBits and the global.
770 // if (GV && GV->hasalignment) Align = GV->getalignment();
771 // Align = std::max(Align, ForcedAlignBits);
773 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
774 unsigned ForcedAlignBits,
775 bool UseFillExpr) const {
776 if (GV && GV->getAlignment())
777 NumBits = Log2_32(GV->getAlignment());
778 NumBits = std::max(NumBits, ForcedAlignBits);
780 if (NumBits == 0) return; // No need to emit alignment.
781 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
782 O << TAI->getAlignDirective() << NumBits;
784 if (CurrentSection && CurrentSection->getKind().isText())
785 if (unsigned FillValue = TAI->getTextAlignFillValue()) {
792 /// EmitZeros - Emit a block of zeros.
794 void AsmPrinter::EmitZeros(uint64_t NumZeros, unsigned AddrSpace) const {
796 if (TAI->getZeroDirective()) {
797 O << TAI->getZeroDirective() << NumZeros;
798 if (TAI->getZeroDirectiveSuffix())
799 O << TAI->getZeroDirectiveSuffix();
802 for (; NumZeros; --NumZeros)
803 O << TAI->getData8bitsDirective(AddrSpace) << "0\n";
808 // Print out the specified constant, without a storage class. Only the
809 // constants valid in constant expressions can occur here.
810 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
811 if (CV->isNullValue() || isa<UndefValue>(CV))
813 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
814 O << CI->getZExtValue();
815 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
816 // This is a constant address for a global variable or function. Use the
817 // name of the variable or function as the address value, possibly
818 // decorating it with GlobalVarAddrPrefix/Suffix or
819 // FunctionAddrPrefix/Suffix (these all default to "" )
820 if (isa<Function>(GV)) {
821 O << TAI->getFunctionAddrPrefix()
822 << Mang->getMangledName(GV)
823 << TAI->getFunctionAddrSuffix();
825 O << TAI->getGlobalVarAddrPrefix()
826 << Mang->getMangledName(GV)
827 << TAI->getGlobalVarAddrSuffix();
829 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
830 const TargetData *TD = TM.getTargetData();
831 unsigned Opcode = CE->getOpcode();
833 case Instruction::Trunc:
834 case Instruction::ZExt:
835 case Instruction::SExt:
836 case Instruction::FPTrunc:
837 case Instruction::FPExt:
838 case Instruction::UIToFP:
839 case Instruction::SIToFP:
840 case Instruction::FPToUI:
841 case Instruction::FPToSI:
842 llvm_unreachable("FIXME: Don't support this constant cast expr");
843 case Instruction::GetElementPtr: {
844 // generate a symbolic expression for the byte address
845 const Constant *ptrVal = CE->getOperand(0);
846 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
847 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
849 // Truncate/sext the offset to the pointer size.
850 if (TD->getPointerSizeInBits() != 64) {
851 int SExtAmount = 64-TD->getPointerSizeInBits();
852 Offset = (Offset << SExtAmount) >> SExtAmount;
857 EmitConstantValueOnly(ptrVal);
859 O << ") + " << Offset;
861 O << ") - " << -Offset;
863 EmitConstantValueOnly(ptrVal);
867 case Instruction::BitCast:
868 return EmitConstantValueOnly(CE->getOperand(0));
870 case Instruction::IntToPtr: {
871 // Handle casts to pointers by changing them into casts to the appropriate
872 // integer type. This promotes constant folding and simplifies this code.
873 Constant *Op = CE->getOperand(0);
874 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
875 return EmitConstantValueOnly(Op);
879 case Instruction::PtrToInt: {
880 // Support only foldable casts to/from pointers that can be eliminated by
881 // changing the pointer to the appropriately sized integer type.
882 Constant *Op = CE->getOperand(0);
883 const Type *Ty = CE->getType();
885 // We can emit the pointer value into this slot if the slot is an
886 // integer slot greater or equal to the size of the pointer.
887 if (TD->getTypeAllocSize(Ty) == TD->getTypeAllocSize(Op->getType()))
888 return EmitConstantValueOnly(Op);
891 EmitConstantValueOnly(Op);
893 APInt::getAllOnesValue(TD->getTypeAllocSizeInBits(Op->getType()));
896 ptrMask.toStringUnsigned(S);
897 O << ") & " << S.c_str() << ')';
900 case Instruction::Add:
901 case Instruction::Sub:
902 case Instruction::And:
903 case Instruction::Or:
904 case Instruction::Xor:
906 EmitConstantValueOnly(CE->getOperand(0));
909 case Instruction::Add:
912 case Instruction::Sub:
915 case Instruction::And:
918 case Instruction::Or:
921 case Instruction::Xor:
928 EmitConstantValueOnly(CE->getOperand(1));
932 llvm_unreachable("Unsupported operator!");
935 llvm_unreachable("Unknown constant value!");
939 /// printAsCString - Print the specified array as a C compatible string, only if
940 /// the predicate isString is true.
942 static void printAsCString(formatted_raw_ostream &O, const ConstantArray *CVA,
944 assert(CVA->isString() && "Array is not string compatible!");
947 for (unsigned i = 0; i != LastElt; ++i) {
949 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
950 printStringChar(O, C);
955 /// EmitString - Emit a zero-byte-terminated string constant.
957 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
958 unsigned NumElts = CVA->getNumOperands();
959 if (TAI->getAscizDirective() && NumElts &&
960 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
961 O << TAI->getAscizDirective();
962 printAsCString(O, CVA, NumElts-1);
964 O << TAI->getAsciiDirective();
965 printAsCString(O, CVA, NumElts);
970 void AsmPrinter::EmitGlobalConstantArray(const ConstantArray *CVA,
971 unsigned AddrSpace) {
972 if (CVA->isString()) {
974 } else { // Not a string. Print the values in successive locations
975 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
976 EmitGlobalConstant(CVA->getOperand(i), AddrSpace);
980 void AsmPrinter::EmitGlobalConstantVector(const ConstantVector *CP) {
981 const VectorType *PTy = CP->getType();
983 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
984 EmitGlobalConstant(CP->getOperand(I));
987 void AsmPrinter::EmitGlobalConstantStruct(const ConstantStruct *CVS,
988 unsigned AddrSpace) {
989 // Print the fields in successive locations. Pad to align if needed!
990 const TargetData *TD = TM.getTargetData();
991 unsigned Size = TD->getTypeAllocSize(CVS->getType());
992 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
993 uint64_t sizeSoFar = 0;
994 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
995 const Constant* field = CVS->getOperand(i);
997 // Check if padding is needed and insert one or more 0s.
998 uint64_t fieldSize = TD->getTypeAllocSize(field->getType());
999 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
1000 - cvsLayout->getElementOffset(i)) - fieldSize;
1001 sizeSoFar += fieldSize + padSize;
1003 // Now print the actual field value.
1004 EmitGlobalConstant(field, AddrSpace);
1006 // Insert padding - this may include padding to increase the size of the
1007 // current field up to the ABI size (if the struct is not packed) as well
1008 // as padding to ensure that the next field starts at the right offset.
1009 EmitZeros(padSize, AddrSpace);
1011 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
1012 "Layout of constant struct may be incorrect!");
1015 void AsmPrinter::EmitGlobalConstantFP(const ConstantFP *CFP,
1016 unsigned AddrSpace) {
1017 // FP Constants are printed as integer constants to avoid losing
1019 const TargetData *TD = TM.getTargetData();
1020 if (CFP->getType() == Type::DoubleTy) {
1021 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
1022 uint64_t i = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
1023 if (TAI->getData64bitsDirective(AddrSpace)) {
1024 O << TAI->getData64bitsDirective(AddrSpace) << i;
1026 O.PadToColumn(TAI->getCommentColumn(), 1);
1027 O << TAI->getCommentString() << " double " << Val;
1030 } else if (TD->isBigEndian()) {
1031 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
1033 O.PadToColumn(TAI->getCommentColumn(), 1);
1034 O << TAI->getCommentString()
1035 << " most significant word of double " << Val;
1038 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
1040 O.PadToColumn(TAI->getCommentColumn(), 1);
1041 O << TAI->getCommentString()
1042 << " least significant word of double " << Val;
1046 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
1048 O.PadToColumn(TAI->getCommentColumn(), 1);
1049 O << TAI->getCommentString()
1050 << " least significant word of double " << Val;
1053 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
1055 O.PadToColumn(TAI->getCommentColumn(), 1);
1056 O << TAI->getCommentString()
1057 << " most significant word of double " << Val;
1062 } else if (CFP->getType() == Type::FloatTy) {
1063 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
1064 O << TAI->getData32bitsDirective(AddrSpace)
1065 << CFP->getValueAPF().bitcastToAPInt().getZExtValue();
1067 O.PadToColumn(TAI->getCommentColumn(), 1);
1068 O << TAI->getCommentString() << " float " << Val;
1072 } else if (CFP->getType() == Type::X86_FP80Ty) {
1073 // all long double variants are printed as hex
1074 // api needed to prevent premature destruction
1075 APInt api = CFP->getValueAPF().bitcastToAPInt();
1076 const uint64_t *p = api.getRawData();
1077 // Convert to double so we can print the approximate val as a comment.
1078 APFloat DoubleVal = CFP->getValueAPF();
1080 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
1082 if (TD->isBigEndian()) {
1083 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
1085 O.PadToColumn(TAI->getCommentColumn(), 1);
1086 O << TAI->getCommentString()
1087 << " most significant halfword of x86_fp80 ~"
1088 << DoubleVal.convertToDouble();
1091 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
1093 O.PadToColumn(TAI->getCommentColumn(), 1);
1094 O << TAI->getCommentString() << " next halfword";
1097 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
1099 O.PadToColumn(TAI->getCommentColumn(), 1);
1100 O << TAI->getCommentString() << " next halfword";
1103 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
1105 O.PadToColumn(TAI->getCommentColumn(), 1);
1106 O << TAI->getCommentString() << " next halfword";
1109 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
1111 O.PadToColumn(TAI->getCommentColumn(), 1);
1112 O << TAI->getCommentString()
1113 << " least significant halfword";
1117 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
1119 O.PadToColumn(TAI->getCommentColumn(), 1);
1120 O << TAI->getCommentString()
1121 << " least significant halfword of x86_fp80 ~"
1122 << DoubleVal.convertToDouble();
1125 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
1127 O.PadToColumn(TAI->getCommentColumn(), 1);
1128 O << TAI->getCommentString()
1129 << " next halfword";
1132 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
1134 O.PadToColumn(TAI->getCommentColumn(), 1);
1135 O << TAI->getCommentString()
1136 << " next halfword";
1139 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
1141 O.PadToColumn(TAI->getCommentColumn(), 1);
1142 O << TAI->getCommentString()
1143 << " next halfword";
1146 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
1148 O.PadToColumn(TAI->getCommentColumn(), 1);
1149 O << TAI->getCommentString()
1150 << " most significant halfword";
1154 EmitZeros(TD->getTypeAllocSize(Type::X86_FP80Ty) -
1155 TD->getTypeStoreSize(Type::X86_FP80Ty), AddrSpace);
1157 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1158 // all long double variants are printed as hex
1159 // api needed to prevent premature destruction
1160 APInt api = CFP->getValueAPF().bitcastToAPInt();
1161 const uint64_t *p = api.getRawData();
1162 if (TD->isBigEndian()) {
1163 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
1165 O.PadToColumn(TAI->getCommentColumn(), 1);
1166 O << TAI->getCommentString()
1167 << " most significant word of ppc_fp128";
1170 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
1172 O.PadToColumn(TAI->getCommentColumn(), 1);
1173 O << TAI->getCommentString()
1177 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
1179 O.PadToColumn(TAI->getCommentColumn(), 1);
1180 O << TAI->getCommentString()
1184 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
1186 O.PadToColumn(TAI->getCommentColumn(), 1);
1187 O << TAI->getCommentString()
1188 << " least significant word";
1192 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
1194 O.PadToColumn(TAI->getCommentColumn(), 1);
1195 O << TAI->getCommentString()
1196 << " least significant word of ppc_fp128";
1199 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
1201 O.PadToColumn(TAI->getCommentColumn(), 1);
1202 O << TAI->getCommentString()
1206 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
1208 O.PadToColumn(TAI->getCommentColumn(), 1);
1209 O << TAI->getCommentString()
1213 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
1215 O.PadToColumn(TAI->getCommentColumn(), 1);
1216 O << TAI->getCommentString()
1217 << " most significant word";
1222 } else llvm_unreachable("Floating point constant type not handled");
1225 void AsmPrinter::EmitGlobalConstantLargeInt(const ConstantInt *CI,
1226 unsigned AddrSpace) {
1227 const TargetData *TD = TM.getTargetData();
1228 unsigned BitWidth = CI->getBitWidth();
1229 assert(isPowerOf2_32(BitWidth) &&
1230 "Non-power-of-2-sized integers not handled!");
1232 // We don't expect assemblers to support integer data directives
1233 // for more than 64 bits, so we emit the data in at most 64-bit
1234 // quantities at a time.
1235 const uint64_t *RawData = CI->getValue().getRawData();
1236 for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
1238 if (TD->isBigEndian())
1239 Val = RawData[e - i - 1];
1243 if (TAI->getData64bitsDirective(AddrSpace))
1244 O << TAI->getData64bitsDirective(AddrSpace) << Val << '\n';
1245 else if (TD->isBigEndian()) {
1246 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
1248 O.PadToColumn(TAI->getCommentColumn(), 1);
1249 O << TAI->getCommentString()
1250 << " most significant half of i64 " << Val;
1253 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
1255 O.PadToColumn(TAI->getCommentColumn(), 1);
1256 O << TAI->getCommentString()
1257 << " least significant half of i64 " << Val;
1261 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
1263 O.PadToColumn(TAI->getCommentColumn(), 1);
1264 O << TAI->getCommentString()
1265 << " least significant half of i64 " << Val;
1268 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
1270 O.PadToColumn(TAI->getCommentColumn(), 1);
1271 O << TAI->getCommentString()
1272 << " most significant half of i64 " << Val;
1279 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
1280 void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) {
1281 const TargetData *TD = TM.getTargetData();
1282 const Type *type = CV->getType();
1283 unsigned Size = TD->getTypeAllocSize(type);
1285 if (CV->isNullValue() || isa<UndefValue>(CV)) {
1286 EmitZeros(Size, AddrSpace);
1288 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
1289 EmitGlobalConstantArray(CVA , AddrSpace);
1291 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
1292 EmitGlobalConstantStruct(CVS, AddrSpace);
1294 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
1295 EmitGlobalConstantFP(CFP, AddrSpace);
1297 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1298 // Small integers are handled below; large integers are handled here.
1300 EmitGlobalConstantLargeInt(CI, AddrSpace);
1303 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1304 EmitGlobalConstantVector(CP);
1308 printDataDirective(type, AddrSpace);
1309 EmitConstantValueOnly(CV);
1311 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1313 CI->getValue().toStringUnsigned(S, 16);
1314 O.PadToColumn(TAI->getCommentColumn(), 1);
1315 O << TAI->getCommentString() << " 0x" << S.c_str();
1321 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1322 // Target doesn't support this yet!
1323 llvm_unreachable("Target does not support EmitMachineConstantPoolValue");
1326 /// PrintSpecial - Print information related to the specified machine instr
1327 /// that is independent of the operand, and may be independent of the instr
1328 /// itself. This can be useful for portably encoding the comment character
1329 /// or other bits of target-specific knowledge into the asmstrings. The
1330 /// syntax used is ${:comment}. Targets can override this to add support
1331 /// for their own strange codes.
1332 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) const {
1333 if (!strcmp(Code, "private")) {
1334 O << TAI->getPrivateGlobalPrefix();
1335 } else if (!strcmp(Code, "comment")) {
1337 O << TAI->getCommentString();
1338 } else if (!strcmp(Code, "uid")) {
1339 // Comparing the address of MI isn't sufficient, because machineinstrs may
1340 // be allocated to the same address across functions.
1341 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1343 // If this is a new LastFn instruction, bump the counter.
1344 if (LastMI != MI || LastFn != ThisF) {
1352 raw_string_ostream Msg(msg);
1353 Msg << "Unknown special formatter '" << Code
1354 << "' for machine instr: " << *MI;
1355 llvm_report_error(Msg.str());
1359 /// processDebugLoc - Processes the debug information of each machine
1360 /// instruction's DebugLoc.
1361 void AsmPrinter::processDebugLoc(DebugLoc DL) {
1365 if (TAI->doesSupportDebugInformation() && DW->ShouldEmitDwarfDebug()) {
1366 if (!DL.isUnknown()) {
1367 DebugLocTuple CurDLT = MF->getDebugLocTuple(DL);
1369 if (CurDLT.CompileUnit != 0 && PrevDLT != CurDLT)
1370 printLabel(DW->RecordSourceLine(CurDLT.Line, CurDLT.Col,
1371 DICompileUnit(CurDLT.CompileUnit)));
1378 /// printInlineAsm - This method formats and prints the specified machine
1379 /// instruction that is an inline asm.
1380 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1381 unsigned NumOperands = MI->getNumOperands();
1383 // Count the number of register definitions.
1384 unsigned NumDefs = 0;
1385 for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
1387 assert(NumDefs != NumOperands-1 && "No asm string?");
1389 assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
1391 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1392 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1394 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1395 // These are useful to see where empty asm's wound up.
1396 if (AsmStr[0] == 0) {
1397 O << TAI->getCommentString() << TAI->getInlineAsmStart() << "\n\t";
1398 O << TAI->getCommentString() << TAI->getInlineAsmEnd() << '\n';
1402 O << TAI->getCommentString() << TAI->getInlineAsmStart() << "\n\t";
1404 // The variant of the current asmprinter.
1405 int AsmPrinterVariant = TAI->getAssemblerDialect();
1407 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1408 const char *LastEmitted = AsmStr; // One past the last character emitted.
1410 while (*LastEmitted) {
1411 switch (*LastEmitted) {
1413 // Not a special case, emit the string section literally.
1414 const char *LiteralEnd = LastEmitted+1;
1415 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1416 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1418 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1419 O.write(LastEmitted, LiteralEnd-LastEmitted);
1420 LastEmitted = LiteralEnd;
1424 ++LastEmitted; // Consume newline character.
1425 O << '\n'; // Indent code with newline.
1428 ++LastEmitted; // Consume '$' character.
1432 switch (*LastEmitted) {
1433 default: Done = false; break;
1434 case '$': // $$ -> $
1435 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1437 ++LastEmitted; // Consume second '$' character.
1439 case '(': // $( -> same as GCC's { character.
1440 ++LastEmitted; // Consume '(' character.
1441 if (CurVariant != -1) {
1442 llvm_report_error("Nested variants found in inline asm string: '"
1443 + std::string(AsmStr) + "'");
1445 CurVariant = 0; // We're in the first variant now.
1448 ++LastEmitted; // consume '|' character.
1449 if (CurVariant == -1)
1450 O << '|'; // this is gcc's behavior for | outside a variant
1452 ++CurVariant; // We're in the next variant.
1454 case ')': // $) -> same as GCC's } char.
1455 ++LastEmitted; // consume ')' character.
1456 if (CurVariant == -1)
1457 O << '}'; // this is gcc's behavior for } outside a variant
1464 bool HasCurlyBraces = false;
1465 if (*LastEmitted == '{') { // ${variable}
1466 ++LastEmitted; // Consume '{' character.
1467 HasCurlyBraces = true;
1470 // If we have ${:foo}, then this is not a real operand reference, it is a
1471 // "magic" string reference, just like in .td files. Arrange to call
1473 if (HasCurlyBraces && *LastEmitted == ':') {
1475 const char *StrStart = LastEmitted;
1476 const char *StrEnd = strchr(StrStart, '}');
1478 llvm_report_error("Unterminated ${:foo} operand in inline asm string: '"
1479 + std::string(AsmStr) + "'");
1482 std::string Val(StrStart, StrEnd);
1483 PrintSpecial(MI, Val.c_str());
1484 LastEmitted = StrEnd+1;
1488 const char *IDStart = LastEmitted;
1491 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1492 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1493 llvm_report_error("Bad $ operand number in inline asm string: '"
1494 + std::string(AsmStr) + "'");
1496 LastEmitted = IDEnd;
1498 char Modifier[2] = { 0, 0 };
1500 if (HasCurlyBraces) {
1501 // If we have curly braces, check for a modifier character. This
1502 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1503 if (*LastEmitted == ':') {
1504 ++LastEmitted; // Consume ':' character.
1505 if (*LastEmitted == 0) {
1506 llvm_report_error("Bad ${:} expression in inline asm string: '"
1507 + std::string(AsmStr) + "'");
1510 Modifier[0] = *LastEmitted;
1511 ++LastEmitted; // Consume modifier character.
1514 if (*LastEmitted != '}') {
1515 llvm_report_error("Bad ${} expression in inline asm string: '"
1516 + std::string(AsmStr) + "'");
1518 ++LastEmitted; // Consume '}' character.
1521 if ((unsigned)Val >= NumOperands-1) {
1522 llvm_report_error("Invalid $ operand number in inline asm string: '"
1523 + std::string(AsmStr) + "'");
1526 // Okay, we finally have a value number. Ask the target to print this
1528 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1533 // Scan to find the machine operand number for the operand.
1534 for (; Val; --Val) {
1535 if (OpNo >= MI->getNumOperands()) break;
1536 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1537 OpNo += InlineAsm::getNumOperandRegisters(OpFlags) + 1;
1540 if (OpNo >= MI->getNumOperands()) {
1543 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1544 ++OpNo; // Skip over the ID number.
1546 if (Modifier[0]=='l') // labels are target independent
1547 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1548 false, false, false);
1550 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1551 if ((OpFlags & 7) == 4) {
1552 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1553 Modifier[0] ? Modifier : 0);
1555 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1556 Modifier[0] ? Modifier : 0);
1562 raw_string_ostream Msg(msg);
1563 Msg << "Invalid operand found in inline asm: '"
1566 llvm_report_error(Msg.str());
1573 O << "\n\t" << TAI->getCommentString() << TAI->getInlineAsmEnd() << '\n';
1576 /// printImplicitDef - This method prints the specified machine instruction
1577 /// that is an implicit def.
1578 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1580 O.PadToColumn(TAI->getCommentColumn(), 1);
1581 O << TAI->getCommentString() << " implicit-def: "
1582 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1586 /// printLabel - This method prints a local label used by debug and
1587 /// exception handling tables.
1588 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1589 printLabel(MI->getOperand(0).getImm());
1592 void AsmPrinter::printLabel(unsigned Id) const {
1593 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1596 /// printDeclare - This method prints a local variable declaration used by
1598 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1599 /// entry into dwarf table.
1600 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1601 unsigned FI = MI->getOperand(0).getIndex();
1602 GlobalValue *GV = MI->getOperand(1).getGlobal();
1603 DW->RecordVariable(cast<GlobalVariable>(GV), FI, MI);
1606 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1607 /// instruction, using the specified assembler variant. Targets should
1608 /// overried this to format as appropriate.
1609 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1610 unsigned AsmVariant, const char *ExtraCode) {
1611 // Target doesn't support this yet!
1615 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1616 unsigned AsmVariant,
1617 const char *ExtraCode) {
1618 // Target doesn't support this yet!
1622 /// printBasicBlockLabel - This method prints the label for the specified
1623 /// MachineBasicBlock
1624 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1627 bool printComment) const {
1629 unsigned Align = MBB->getAlignment();
1631 EmitAlignment(Log2_32(Align));
1634 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1635 << MBB->getNumber();
1639 if (const BasicBlock *BB = MBB->getBasicBlock())
1640 if (BB->hasName()) {
1641 O.PadToColumn(TAI->getCommentColumn(), 1);
1642 O << TAI->getCommentString() << ' ';
1643 WriteAsOperand(O, BB, /*PrintType=*/false);
1651 /// printPICJumpTableSetLabel - This method prints a set label for the
1652 /// specified MachineBasicBlock for a jumptable entry.
1653 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1654 const MachineBasicBlock *MBB) const {
1655 if (!TAI->getSetDirective())
1658 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1659 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1660 printBasicBlockLabel(MBB, false, false, false);
1661 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1662 << '_' << uid << '\n';
1665 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1666 const MachineBasicBlock *MBB) const {
1667 if (!TAI->getSetDirective())
1670 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1671 << getFunctionNumber() << '_' << uid << '_' << uid2
1672 << "_set_" << MBB->getNumber() << ',';
1673 printBasicBlockLabel(MBB, false, false, false);
1674 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1675 << '_' << uid << '_' << uid2 << '\n';
1678 /// printDataDirective - This method prints the asm directive for the
1680 void AsmPrinter::printDataDirective(const Type *type, unsigned AddrSpace) {
1681 const TargetData *TD = TM.getTargetData();
1682 switch (type->getTypeID()) {
1683 case Type::FloatTyID: case Type::DoubleTyID:
1684 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1685 assert(0 && "Should have already output floating point constant.");
1687 assert(0 && "Can't handle printing this type of thing");
1688 case Type::IntegerTyID: {
1689 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1691 O << TAI->getData8bitsDirective(AddrSpace);
1692 else if (BitWidth <= 16)
1693 O << TAI->getData16bitsDirective(AddrSpace);
1694 else if (BitWidth <= 32)
1695 O << TAI->getData32bitsDirective(AddrSpace);
1696 else if (BitWidth <= 64) {
1697 assert(TAI->getData64bitsDirective(AddrSpace) &&
1698 "Target cannot handle 64-bit constant exprs!");
1699 O << TAI->getData64bitsDirective(AddrSpace);
1701 llvm_unreachable("Target cannot handle given data directive width!");
1705 case Type::PointerTyID:
1706 if (TD->getPointerSize() == 8) {
1707 assert(TAI->getData64bitsDirective(AddrSpace) &&
1708 "Target cannot handle 64-bit pointer exprs!");
1709 O << TAI->getData64bitsDirective(AddrSpace);
1710 } else if (TD->getPointerSize() == 2) {
1711 O << TAI->getData16bitsDirective(AddrSpace);
1712 } else if (TD->getPointerSize() == 1) {
1713 O << TAI->getData8bitsDirective(AddrSpace);
1715 O << TAI->getData32bitsDirective(AddrSpace);
1721 void AsmPrinter::printVisibility(const std::string& Name,
1722 unsigned Visibility) const {
1723 if (Visibility == GlobalValue::HiddenVisibility) {
1724 if (const char *Directive = TAI->getHiddenDirective())
1725 O << Directive << Name << '\n';
1726 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1727 if (const char *Directive = TAI->getProtectedDirective())
1728 O << Directive << Name << '\n';
1732 void AsmPrinter::printOffset(int64_t Offset) const {
1735 else if (Offset < 0)
1739 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
1740 if (!S->usesMetadata())
1743 gcp_iterator GCPI = GCMetadataPrinters.find(S);
1744 if (GCPI != GCMetadataPrinters.end())
1745 return GCPI->second;
1747 const char *Name = S->getName().c_str();
1749 for (GCMetadataPrinterRegistry::iterator
1750 I = GCMetadataPrinterRegistry::begin(),
1751 E = GCMetadataPrinterRegistry::end(); I != E; ++I)
1752 if (strcmp(Name, I->getName()) == 0) {
1753 GCMetadataPrinter *GMP = I->instantiate();
1755 GCMetadataPrinters.insert(std::make_pair(S, GMP));
1759 cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";
1760 llvm_unreachable(0);
1763 /// EmitComments - Pretty-print comments for instructions
1764 void AsmPrinter::EmitComments(const MachineInstr &MI) const {
1766 MI.getDebugLoc().isUnknown())
1769 DebugLocTuple DLT = MF->getDebugLocTuple(MI.getDebugLoc());
1771 // Print source line info
1772 O.PadToColumn(TAI->getCommentColumn(), 1);
1773 O << TAI->getCommentString() << " SrcLine ";
1774 if (DLT.CompileUnit->hasInitializer()) {
1775 Constant *Name = DLT.CompileUnit->getInitializer();
1776 if (ConstantArray *NameString = dyn_cast<ConstantArray>(Name))
1777 if (NameString->isString())
1778 O << NameString->getAsString() << " ";
1782 O << ":" << DLT.Col;
1785 /// EmitComments - Pretty-print comments for instructions
1786 void AsmPrinter::EmitComments(const MCInst &MI) const
1789 if (!MI.getDebugLoc().isUnknown()) {
1790 DebugLocTuple DLT = MF->getDebugLocTuple(MI.getDebugLoc());
1792 // Print source line info
1793 O.PadToColumn(TAI->getCommentColumn(), 1);
1794 O << TAI->getCommentString() << " SrcLine ";
1795 if (DLT.CompileUnit->hasInitializer()) {
1796 Constant *Name = DLT.CompileUnit->getInitializer();
1797 if (ConstantArray *NameString = dyn_cast<ConstantArray>(Name))
1798 if (NameString->isString()) {
1799 O << NameString->getAsString() << " ";
1804 O << ":" << DLT.Col;
1809 /// EmitComments - Pretty-print comments for basic blocks
1810 void AsmPrinter::EmitComments(const MachineBasicBlock &MBB) const
1813 // Add loop depth information
1814 const MachineLoop *loop = LI->getLoopFor(&MBB);
1817 // Print a newline after bb# annotation.
1819 O.PadToColumn(TAI->getCommentColumn(), 1);
1820 O << TAI->getCommentString() << " Loop Depth " << loop->getLoopDepth()
1823 O.PadToColumn(TAI->getCommentColumn(), 1);
1825 MachineBasicBlock *Header = loop->getHeader();
1826 assert(Header && "No header for loop");
1828 if (Header == &MBB) {
1829 O << TAI->getCommentString() << " Loop Header";
1830 PrintChildLoopComment(loop);
1833 O << TAI->getCommentString() << " Loop Header is BB"
1834 << getFunctionNumber() << "_" << loop->getHeader()->getNumber();
1837 if (loop->empty()) {
1839 O.PadToColumn(TAI->getCommentColumn(), 1);
1840 O << TAI->getCommentString() << " Inner Loop";
1843 // Add parent loop information
1844 for (const MachineLoop *CurLoop = loop->getParentLoop();
1846 CurLoop = CurLoop->getParentLoop()) {
1847 MachineBasicBlock *Header = CurLoop->getHeader();
1848 assert(Header && "No header for loop");
1851 O.PadToColumn(TAI->getCommentColumn(), 1);
1852 O << TAI->getCommentString() << Indent(CurLoop->getLoopDepth()-1)
1853 << " Inside Loop BB" << getFunctionNumber() << "_"
1854 << Header->getNumber() << " Depth " << CurLoop->getLoopDepth();
1860 void AsmPrinter::PrintChildLoopComment(const MachineLoop *loop) const {
1861 // Add child loop information
1862 for(MachineLoop::iterator cl = loop->begin(),
1863 clend = loop->end();
1866 MachineBasicBlock *Header = (*cl)->getHeader();
1867 assert(Header && "No header for loop");
1870 O.PadToColumn(TAI->getCommentColumn(), 1);
1872 O << TAI->getCommentString() << Indent((*cl)->getLoopDepth()-1)
1873 << " Child Loop BB" << getFunctionNumber() << "_"
1874 << Header->getNumber() << " Depth " << (*cl)->getLoopDepth();
1876 PrintChildLoopComment(*cl);