1 //===-- AsmPrinter.cpp - Common AsmPrinter code ---------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the AsmPrinter class.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/CodeGen/AsmPrinter.h"
15 #include "llvm/Assembly/Writer.h"
16 #include "llvm/DerivedTypes.h"
17 #include "llvm/Constants.h"
18 #include "llvm/Module.h"
19 #include "llvm/CodeGen/GCMetadataPrinter.h"
20 #include "llvm/CodeGen/MachineConstantPool.h"
21 #include "llvm/CodeGen/MachineJumpTableInfo.h"
22 #include "llvm/CodeGen/MachineModuleInfo.h"
23 #include "llvm/CodeGen/DwarfWriter.h"
24 #include "llvm/Analysis/DebugInfo.h"
25 #include "llvm/Support/CommandLine.h"
26 #include "llvm/Support/Mangler.h"
27 #include "llvm/Support/raw_ostream.h"
28 #include "llvm/Target/TargetAsmInfo.h"
29 #include "llvm/Target/TargetData.h"
30 #include "llvm/Target/TargetLowering.h"
31 #include "llvm/Target/TargetOptions.h"
32 #include "llvm/Target/TargetRegisterInfo.h"
33 #include "llvm/ADT/SmallPtrSet.h"
34 #include "llvm/ADT/SmallString.h"
35 #include "llvm/ADT/StringExtras.h"
39 static cl::opt<cl::boolOrDefault>
40 AsmVerbose("asm-verbose", cl::desc("Add comments to directives."),
41 cl::init(cl::BOU_UNSET));
43 char AsmPrinter::ID = 0;
44 AsmPrinter::AsmPrinter(raw_ostream &o, TargetMachine &tm,
45 const TargetAsmInfo *T, CodeGenOpt::Level OL, bool VDef)
46 : MachineFunctionPass(&ID), FunctionNumber(0), OptLevel(OL), O(o),
47 TM(tm), TAI(T), TRI(tm.getRegisterInfo()),
48 IsInTextSection(false)
51 case cl::BOU_UNSET: VerboseAsm = VDef; break;
52 case cl::BOU_TRUE: VerboseAsm = true; break;
53 case cl::BOU_FALSE: VerboseAsm = false; break;
57 AsmPrinter::~AsmPrinter() {
58 for (gcp_iterator I = GCMetadataPrinters.begin(),
59 E = GCMetadataPrinters.end(); I != E; ++I)
63 /// SwitchToTextSection - Switch to the specified text section of the executable
64 /// if we are not already in it!
66 void AsmPrinter::SwitchToTextSection(const char *NewSection,
67 const GlobalValue *GV) {
69 if (GV && GV->hasSection())
70 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
74 // If we're already in this section, we're done.
75 if (CurrentSection == NS) return;
77 // Close the current section, if applicable.
78 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
79 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
83 if (!CurrentSection.empty())
84 O << CurrentSection << TAI->getTextSectionStartSuffix() << '\n';
86 IsInTextSection = true;
89 /// SwitchToDataSection - Switch to the specified data section of the executable
90 /// if we are not already in it!
92 void AsmPrinter::SwitchToDataSection(const char *NewSection,
93 const GlobalValue *GV) {
95 if (GV && GV->hasSection())
96 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
100 // If we're already in this section, we're done.
101 if (CurrentSection == NS) return;
103 // Close the current section, if applicable.
104 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
105 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
109 if (!CurrentSection.empty())
110 O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
112 IsInTextSection = false;
115 /// SwitchToSection - Switch to the specified section of the executable if we
116 /// are not already in it!
117 void AsmPrinter::SwitchToSection(const Section* NS) {
118 const std::string& NewSection = NS->getName();
120 // If we're already in this section, we're done.
121 if (CurrentSection == NewSection) return;
123 // Close the current section, if applicable.
124 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
125 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
127 // FIXME: Make CurrentSection a Section* in the future
128 CurrentSection = NewSection;
129 CurrentSection_ = NS;
131 if (!CurrentSection.empty()) {
132 // If section is named we need to switch into it via special '.section'
133 // directive and also append funky flags. Otherwise - section name is just
134 // some magic assembler directive.
136 O << TAI->getSwitchToSectionDirective()
138 << TAI->getSectionFlags(NS->getFlags());
141 O << TAI->getDataSectionStartSuffix() << '\n';
144 IsInTextSection = (NS->getFlags() & SectionFlags::Code);
147 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
148 MachineFunctionPass::getAnalysisUsage(AU);
149 AU.addRequired<GCModuleInfo>();
152 bool AsmPrinter::doInitialization(Module &M) {
153 Mang = new Mangler(M, TAI->getGlobalPrefix(), TAI->getPrivateGlobalPrefix());
155 if (TAI->doesAllowQuotesInName())
156 Mang->setUseQuotes(true);
158 GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
159 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
161 if (TAI->hasSingleParameterDotFile()) {
162 /* Very minimal debug info. It is ignored if we emit actual
163 debug info. If we don't, this at helps the user find where
164 a function came from. */
165 O << "\t.file\t\"" << M.getModuleIdentifier() << "\"\n";
168 for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
169 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
170 MP->beginAssembly(O, *this, *TAI);
172 if (!M.getModuleInlineAsm().empty())
173 O << TAI->getCommentString() << " Start of file scope inline assembly\n"
174 << M.getModuleInlineAsm()
175 << '\n' << TAI->getCommentString()
176 << " End of file scope inline assembly\n";
178 SwitchToDataSection(""); // Reset back to no section.
180 MachineModuleInfo *MMI = getAnalysisIfAvailable<MachineModuleInfo>();
181 if (MMI) MMI->AnalyzeModule(M);
182 DW = getAnalysisIfAvailable<DwarfWriter>();
186 bool AsmPrinter::doFinalization(Module &M) {
187 if (TAI->getWeakRefDirective()) {
188 if (!ExtWeakSymbols.empty())
189 SwitchToDataSection("");
191 for (std::set<const GlobalValue*>::iterator i = ExtWeakSymbols.begin(),
192 e = ExtWeakSymbols.end(); i != e; ++i)
193 O << TAI->getWeakRefDirective() << Mang->getValueName(*i) << '\n';
196 if (TAI->getSetDirective()) {
197 if (!M.alias_empty())
198 SwitchToSection(TAI->getTextSection());
201 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
203 std::string Name = Mang->getValueName(I);
206 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
207 Target = Mang->getValueName(GV);
209 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
210 O << "\t.globl\t" << Name << '\n';
211 else if (I->hasWeakLinkage())
212 O << TAI->getWeakRefDirective() << Name << '\n';
213 else if (!I->hasLocalLinkage())
214 assert(0 && "Invalid alias linkage");
216 printVisibility(Name, I->getVisibility());
218 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
222 GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
223 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
224 for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
225 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
226 MP->finishAssembly(O, *this, *TAI);
228 // If we don't have any trampolines, then we don't require stack memory
229 // to be executable. Some targets have a directive to declare this.
230 Function* InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
231 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
232 if (TAI->getNonexecutableStackDirective())
233 O << TAI->getNonexecutableStackDirective() << '\n';
235 delete Mang; Mang = 0;
240 AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF,
241 std::string &Name) const {
242 assert(MF && "No machine function?");
243 Name = MF->getFunction()->getName();
245 Name = Mang->getValueName(MF->getFunction());
246 Name = Mang->makeNameProper(TAI->getEHGlobalPrefix() +
247 Name + ".eh", TAI->getGlobalPrefix());
251 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
252 // What's my mangled name?
253 CurrentFnName = Mang->getValueName(MF.getFunction());
254 IncrementFunctionNumber();
258 // SectionCPs - Keep track the alignment, constpool entries per Section.
262 SmallVector<unsigned, 4> CPEs;
263 SectionCPs(const Section *s, unsigned a) : S(s), Alignment(a) {};
267 /// EmitConstantPool - Print to the current output stream assembly
268 /// representations of the constants in the constant pool MCP. This is
269 /// used to print out constants which have been "spilled to memory" by
270 /// the code generator.
272 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
273 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
274 if (CP.empty()) return;
276 // Calculate sections for constant pool entries. We collect entries to go into
277 // the same section together to reduce amount of section switch statements.
278 SmallVector<SectionCPs, 4> CPSections;
279 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
280 MachineConstantPoolEntry CPE = CP[i];
281 unsigned Align = CPE.getAlignment();
282 const Section* S = TAI->SelectSectionForMachineConst(CPE.getType());
283 // The number of sections are small, just do a linear search from the
284 // last section to the first.
286 unsigned SecIdx = CPSections.size();
287 while (SecIdx != 0) {
288 if (CPSections[--SecIdx].S == S) {
294 SecIdx = CPSections.size();
295 CPSections.push_back(SectionCPs(S, Align));
298 if (Align > CPSections[SecIdx].Alignment)
299 CPSections[SecIdx].Alignment = Align;
300 CPSections[SecIdx].CPEs.push_back(i);
303 // Now print stuff into the calculated sections.
304 for (unsigned i = 0, e = CPSections.size(); i != e; ++i) {
305 SwitchToSection(CPSections[i].S);
306 EmitAlignment(Log2_32(CPSections[i].Alignment));
309 for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) {
310 unsigned CPI = CPSections[i].CPEs[j];
311 MachineConstantPoolEntry CPE = CP[CPI];
313 // Emit inter-object padding for alignment.
314 unsigned AlignMask = CPE.getAlignment() - 1;
315 unsigned NewOffset = (Offset + AlignMask) & ~AlignMask;
316 EmitZeros(NewOffset - Offset);
318 const Type *Ty = CPE.getType();
319 Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty);
321 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
322 << CPI << ":\t\t\t\t\t";
324 O << TAI->getCommentString() << ' ';
325 WriteTypeSymbolic(O, CPE.getType(), 0);
328 if (CPE.isMachineConstantPoolEntry())
329 EmitMachineConstantPoolValue(CPE.Val.MachineCPVal);
331 EmitGlobalConstant(CPE.Val.ConstVal);
336 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
337 /// by the current function to the current output stream.
339 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
340 MachineFunction &MF) {
341 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
342 if (JT.empty()) return;
344 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
346 // Pick the directive to use to print the jump table entries, and switch to
347 // the appropriate section.
348 TargetLowering *LoweringInfo = TM.getTargetLowering();
350 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
351 const Function *F = MF.getFunction();
352 unsigned SectionFlags = TAI->SectionFlagsForGlobal(F);
353 bool JTInDiffSection = false;
354 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
355 !JumpTableDataSection ||
356 SectionFlags & SectionFlags::Linkonce) {
357 // In PIC mode, we need to emit the jump table to the same section as the
358 // function body itself, otherwise the label differences won't make sense.
359 // We should also do if the section name is NULL or function is declared in
360 // discardable section.
361 SwitchToSection(TAI->SectionForGlobal(F));
363 SwitchToDataSection(JumpTableDataSection);
364 JTInDiffSection = true;
367 EmitAlignment(Log2_32(MJTI->getAlignment()));
369 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
370 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
372 // If this jump table was deleted, ignore it.
373 if (JTBBs.empty()) continue;
375 // For PIC codegen, if possible we want to use the SetDirective to reduce
376 // the number of relocations the assembler will generate for the jump table.
377 // Set directives are all printed before the jump table itself.
378 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
379 if (TAI->getSetDirective() && IsPic)
380 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
381 if (EmittedSets.insert(JTBBs[ii]))
382 printPICJumpTableSetLabel(i, JTBBs[ii]);
384 // On some targets (e.g. darwin) we want to emit two consequtive labels
385 // before each jump table. The first label is never referenced, but tells
386 // the assembler and linker the extents of the jump table object. The
387 // second label is actually referenced by the code.
388 if (JTInDiffSection) {
389 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
390 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
393 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
394 << '_' << i << ":\n";
396 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
397 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
403 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
404 const MachineBasicBlock *MBB,
405 unsigned uid) const {
406 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
408 // Use JumpTableDirective otherwise honor the entry size from the jump table
410 const char *JTEntryDirective = TAI->getJumpTableDirective();
411 bool HadJTEntryDirective = JTEntryDirective != NULL;
412 if (!HadJTEntryDirective) {
413 JTEntryDirective = MJTI->getEntrySize() == 4 ?
414 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
417 O << JTEntryDirective << ' ';
419 // If we have emitted set directives for the jump table entries, print
420 // them rather than the entries themselves. If we're emitting PIC, then
421 // emit the table entries as differences between two text section labels.
422 // If we're emitting non-PIC code, then emit the entries as direct
423 // references to the target basic blocks.
425 if (TAI->getSetDirective()) {
426 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
427 << '_' << uid << "_set_" << MBB->getNumber();
429 printBasicBlockLabel(MBB, false, false, false);
430 // If the arch uses custom Jump Table directives, don't calc relative to
432 if (!HadJTEntryDirective)
433 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
434 << getFunctionNumber() << '_' << uid;
437 printBasicBlockLabel(MBB, false, false, false);
442 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
443 /// special global used by LLVM. If so, emit it and return true, otherwise
444 /// do nothing and return false.
445 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
446 if (GV->getName() == "llvm.used") {
447 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
448 EmitLLVMUsedList(GV->getInitializer());
452 // Ignore debug and non-emitted data.
453 if (GV->getSection() == "llvm.metadata" ||
454 GV->hasAvailableExternallyLinkage())
457 if (!GV->hasAppendingLinkage()) return false;
459 assert(GV->hasInitializer() && "Not a special LLVM global!");
461 const TargetData *TD = TM.getTargetData();
462 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
463 if (GV->getName() == "llvm.global_ctors") {
464 SwitchToDataSection(TAI->getStaticCtorsSection());
465 EmitAlignment(Align, 0);
466 EmitXXStructorList(GV->getInitializer());
470 if (GV->getName() == "llvm.global_dtors") {
471 SwitchToDataSection(TAI->getStaticDtorsSection());
472 EmitAlignment(Align, 0);
473 EmitXXStructorList(GV->getInitializer());
480 /// findGlobalValue - if CV is an expression equivalent to a single
481 /// global value, return that value.
482 const GlobalValue * AsmPrinter::findGlobalValue(const Constant *CV) {
483 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
485 else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
486 const TargetData *TD = TM.getTargetData();
487 unsigned Opcode = CE->getOpcode();
489 case Instruction::GetElementPtr: {
490 const Constant *ptrVal = CE->getOperand(0);
491 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
492 if (TD->getIndexedOffset(ptrVal->getType(), &idxVec[0], idxVec.size()))
494 return findGlobalValue(ptrVal);
496 case Instruction::BitCast:
497 return findGlobalValue(CE->getOperand(0));
505 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
506 /// global in the specified llvm.used list for which emitUsedDirectiveFor
507 /// is true, as being used with this directive.
509 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
510 const char *Directive = TAI->getUsedDirective();
512 // Should be an array of 'i8*'.
513 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
514 if (InitList == 0) return;
516 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
517 const GlobalValue *GV = findGlobalValue(InitList->getOperand(i));
518 if (TAI->emitUsedDirectiveFor(GV, Mang)) {
520 EmitConstantValueOnly(InitList->getOperand(i));
526 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
527 /// function pointers, ignoring the init priority.
528 void AsmPrinter::EmitXXStructorList(Constant *List) {
529 // Should be an array of '{ int, void ()* }' structs. The first value is the
530 // init priority, which we ignore.
531 if (!isa<ConstantArray>(List)) return;
532 ConstantArray *InitList = cast<ConstantArray>(List);
533 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
534 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
535 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
537 if (CS->getOperand(1)->isNullValue())
538 return; // Found a null terminator, exit printing.
539 // Emit the function pointer.
540 EmitGlobalConstant(CS->getOperand(1));
544 /// getGlobalLinkName - Returns the asm/link name of of the specified
545 /// global variable. Should be overridden by each target asm printer to
546 /// generate the appropriate value.
547 const std::string &AsmPrinter::getGlobalLinkName(const GlobalVariable *GV,
548 std::string &LinkName) const {
549 if (isa<Function>(GV)) {
550 LinkName += TAI->getFunctionAddrPrefix();
551 LinkName += Mang->getValueName(GV);
552 LinkName += TAI->getFunctionAddrSuffix();
554 LinkName += TAI->getGlobalVarAddrPrefix();
555 LinkName += Mang->getValueName(GV);
556 LinkName += TAI->getGlobalVarAddrSuffix();
562 /// EmitExternalGlobal - Emit the external reference to a global variable.
563 /// Should be overridden if an indirect reference should be used.
564 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
566 O << getGlobalLinkName(GV, GLN);
571 //===----------------------------------------------------------------------===//
572 /// LEB 128 number encoding.
574 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
575 /// representing an unsigned leb128 value.
576 void AsmPrinter::PrintULEB128(unsigned Value) const {
579 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
581 if (Value) Byte |= 0x80;
582 O << "0x" << utohex_buffer(Byte, Buffer+20);
583 if (Value) O << ", ";
587 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
588 /// representing a signed leb128 value.
589 void AsmPrinter::PrintSLEB128(int Value) const {
590 int Sign = Value >> (8 * sizeof(Value) - 1);
595 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
597 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
598 if (IsMore) Byte |= 0x80;
599 O << "0x" << utohex_buffer(Byte, Buffer+20);
600 if (IsMore) O << ", ";
604 //===--------------------------------------------------------------------===//
605 // Emission and print routines
608 /// PrintHex - Print a value as a hexidecimal value.
610 void AsmPrinter::PrintHex(int Value) const {
612 O << "0x" << utohex_buffer(static_cast<unsigned>(Value), Buffer+20);
615 /// EOL - Print a newline character to asm stream. If a comment is present
616 /// then it will be printed first. Comments should not contain '\n'.
617 void AsmPrinter::EOL() const {
621 void AsmPrinter::EOL(const std::string &Comment) const {
622 if (VerboseAsm && !Comment.empty()) {
624 << TAI->getCommentString()
631 void AsmPrinter::EOL(const char* Comment) const {
632 if (VerboseAsm && *Comment) {
634 << TAI->getCommentString()
641 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
642 /// unsigned leb128 value.
643 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
644 if (TAI->hasLEB128()) {
648 O << TAI->getData8bitsDirective();
653 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
654 /// signed leb128 value.
655 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
656 if (TAI->hasLEB128()) {
660 O << TAI->getData8bitsDirective();
665 /// EmitInt8 - Emit a byte directive and value.
667 void AsmPrinter::EmitInt8(int Value) const {
668 O << TAI->getData8bitsDirective();
669 PrintHex(Value & 0xFF);
672 /// EmitInt16 - Emit a short directive and value.
674 void AsmPrinter::EmitInt16(int Value) const {
675 O << TAI->getData16bitsDirective();
676 PrintHex(Value & 0xFFFF);
679 /// EmitInt32 - Emit a long directive and value.
681 void AsmPrinter::EmitInt32(int Value) const {
682 O << TAI->getData32bitsDirective();
686 /// EmitInt64 - Emit a long long directive and value.
688 void AsmPrinter::EmitInt64(uint64_t Value) const {
689 if (TAI->getData64bitsDirective()) {
690 O << TAI->getData64bitsDirective();
693 if (TM.getTargetData()->isBigEndian()) {
694 EmitInt32(unsigned(Value >> 32)); O << '\n';
695 EmitInt32(unsigned(Value));
697 EmitInt32(unsigned(Value)); O << '\n';
698 EmitInt32(unsigned(Value >> 32));
703 /// toOctal - Convert the low order bits of X into an octal digit.
705 static inline char toOctal(int X) {
709 /// printStringChar - Print a char, escaped if necessary.
711 static void printStringChar(raw_ostream &O, unsigned char C) {
714 } else if (C == '\\') {
716 } else if (isprint((unsigned char)C)) {
720 case '\b': O << "\\b"; break;
721 case '\f': O << "\\f"; break;
722 case '\n': O << "\\n"; break;
723 case '\r': O << "\\r"; break;
724 case '\t': O << "\\t"; break;
727 O << toOctal(C >> 6);
728 O << toOctal(C >> 3);
729 O << toOctal(C >> 0);
735 /// EmitString - Emit a string with quotes and a null terminator.
736 /// Special characters are emitted properly.
737 /// \literal (Eg. '\t') \endliteral
738 void AsmPrinter::EmitString(const std::string &String) const {
739 EmitString(String.c_str(), String.size());
742 void AsmPrinter::EmitString(const char *String, unsigned Size) const {
743 const char* AscizDirective = TAI->getAscizDirective();
747 O << TAI->getAsciiDirective();
749 for (unsigned i = 0; i < Size; ++i)
750 printStringChar(O, String[i]);
758 /// EmitFile - Emit a .file directive.
759 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
760 O << "\t.file\t" << Number << " \"";
761 for (unsigned i = 0, N = Name.size(); i < N; ++i)
762 printStringChar(O, Name[i]);
767 //===----------------------------------------------------------------------===//
769 // EmitAlignment - Emit an alignment directive to the specified power of
770 // two boundary. For example, if you pass in 3 here, you will get an 8
771 // byte alignment. If a global value is specified, and if that global has
772 // an explicit alignment requested, it will unconditionally override the
773 // alignment request. However, if ForcedAlignBits is specified, this value
774 // has final say: the ultimate alignment will be the max of ForcedAlignBits
775 // and the alignment computed with NumBits and the global.
779 // if (GV && GV->hasalignment) Align = GV->getalignment();
780 // Align = std::max(Align, ForcedAlignBits);
782 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
783 unsigned ForcedAlignBits,
784 bool UseFillExpr) const {
785 if (GV && GV->getAlignment())
786 NumBits = Log2_32(GV->getAlignment());
787 NumBits = std::max(NumBits, ForcedAlignBits);
789 if (NumBits == 0) return; // No need to emit alignment.
790 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
791 O << TAI->getAlignDirective() << NumBits;
793 unsigned FillValue = TAI->getTextAlignFillValue();
794 UseFillExpr &= IsInTextSection && FillValue;
803 /// EmitZeros - Emit a block of zeros.
805 void AsmPrinter::EmitZeros(uint64_t NumZeros, unsigned AddrSpace) const {
807 if (TAI->getZeroDirective()) {
808 O << TAI->getZeroDirective() << NumZeros;
809 if (TAI->getZeroDirectiveSuffix())
810 O << TAI->getZeroDirectiveSuffix();
813 for (; NumZeros; --NumZeros)
814 O << TAI->getData8bitsDirective(AddrSpace) << "0\n";
819 // Print out the specified constant, without a storage class. Only the
820 // constants valid in constant expressions can occur here.
821 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
822 if (CV->isNullValue() || isa<UndefValue>(CV))
824 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
825 O << CI->getZExtValue();
826 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
827 // This is a constant address for a global variable or function. Use the
828 // name of the variable or function as the address value, possibly
829 // decorating it with GlobalVarAddrPrefix/Suffix or
830 // FunctionAddrPrefix/Suffix (these all default to "" )
831 if (isa<Function>(GV)) {
832 O << TAI->getFunctionAddrPrefix()
833 << Mang->getValueName(GV)
834 << TAI->getFunctionAddrSuffix();
836 O << TAI->getGlobalVarAddrPrefix()
837 << Mang->getValueName(GV)
838 << TAI->getGlobalVarAddrSuffix();
840 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
841 const TargetData *TD = TM.getTargetData();
842 unsigned Opcode = CE->getOpcode();
844 case Instruction::GetElementPtr: {
845 // generate a symbolic expression for the byte address
846 const Constant *ptrVal = CE->getOperand(0);
847 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
848 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
850 // Truncate/sext the offset to the pointer size.
851 if (TD->getPointerSizeInBits() != 64) {
852 int SExtAmount = 64-TD->getPointerSizeInBits();
853 Offset = (Offset << SExtAmount) >> SExtAmount;
858 EmitConstantValueOnly(ptrVal);
860 O << ") + " << Offset;
862 O << ") - " << -Offset;
864 EmitConstantValueOnly(ptrVal);
868 case Instruction::Trunc:
869 case Instruction::ZExt:
870 case Instruction::SExt:
871 case Instruction::FPTrunc:
872 case Instruction::FPExt:
873 case Instruction::UIToFP:
874 case Instruction::SIToFP:
875 case Instruction::FPToUI:
876 case Instruction::FPToSI:
877 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
879 case Instruction::BitCast:
880 return EmitConstantValueOnly(CE->getOperand(0));
882 case Instruction::IntToPtr: {
883 // Handle casts to pointers by changing them into casts to the appropriate
884 // integer type. This promotes constant folding and simplifies this code.
885 Constant *Op = CE->getOperand(0);
886 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
887 return EmitConstantValueOnly(Op);
891 case Instruction::PtrToInt: {
892 // Support only foldable casts to/from pointers that can be eliminated by
893 // changing the pointer to the appropriately sized integer type.
894 Constant *Op = CE->getOperand(0);
895 const Type *Ty = CE->getType();
897 // We can emit the pointer value into this slot if the slot is an
898 // integer slot greater or equal to the size of the pointer.
899 if (TD->getTypeAllocSize(Ty) >= TD->getTypeAllocSize(Op->getType()))
900 return EmitConstantValueOnly(Op);
903 EmitConstantValueOnly(Op);
904 APInt ptrMask = APInt::getAllOnesValue(TD->getTypeAllocSizeInBits(Ty));
907 ptrMask.toStringUnsigned(S);
908 O << ") & " << S.c_str() << ')';
911 case Instruction::Add:
912 case Instruction::Sub:
913 case Instruction::And:
914 case Instruction::Or:
915 case Instruction::Xor:
917 EmitConstantValueOnly(CE->getOperand(0));
920 case Instruction::Add:
923 case Instruction::Sub:
926 case Instruction::And:
929 case Instruction::Or:
932 case Instruction::Xor:
939 EmitConstantValueOnly(CE->getOperand(1));
943 assert(0 && "Unsupported operator!");
946 assert(0 && "Unknown constant value!");
950 /// printAsCString - Print the specified array as a C compatible string, only if
951 /// the predicate isString is true.
953 static void printAsCString(raw_ostream &O, const ConstantArray *CVA,
955 assert(CVA->isString() && "Array is not string compatible!");
958 for (unsigned i = 0; i != LastElt; ++i) {
960 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
961 printStringChar(O, C);
966 /// EmitString - Emit a zero-byte-terminated string constant.
968 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
969 unsigned NumElts = CVA->getNumOperands();
970 if (TAI->getAscizDirective() && NumElts &&
971 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
972 O << TAI->getAscizDirective();
973 printAsCString(O, CVA, NumElts-1);
975 O << TAI->getAsciiDirective();
976 printAsCString(O, CVA, NumElts);
981 void AsmPrinter::EmitGlobalConstantArray(const ConstantArray *CVA,
982 unsigned AddrSpace) {
983 if (CVA->isString()) {
985 } else { // Not a string. Print the values in successive locations
986 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
987 EmitGlobalConstant(CVA->getOperand(i), AddrSpace);
991 void AsmPrinter::EmitGlobalConstantVector(const ConstantVector *CP) {
992 const VectorType *PTy = CP->getType();
994 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
995 EmitGlobalConstant(CP->getOperand(I));
998 void AsmPrinter::EmitGlobalConstantStruct(const ConstantStruct *CVS,
999 unsigned AddrSpace) {
1000 // Print the fields in successive locations. Pad to align if needed!
1001 const TargetData *TD = TM.getTargetData();
1002 unsigned Size = TD->getTypeAllocSize(CVS->getType());
1003 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
1004 uint64_t sizeSoFar = 0;
1005 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
1006 const Constant* field = CVS->getOperand(i);
1008 // Check if padding is needed and insert one or more 0s.
1009 uint64_t fieldSize = TD->getTypeAllocSize(field->getType());
1010 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
1011 - cvsLayout->getElementOffset(i)) - fieldSize;
1012 sizeSoFar += fieldSize + padSize;
1014 // Now print the actual field value.
1015 EmitGlobalConstant(field, AddrSpace);
1017 // Insert padding - this may include padding to increase the size of the
1018 // current field up to the ABI size (if the struct is not packed) as well
1019 // as padding to ensure that the next field starts at the right offset.
1020 EmitZeros(padSize, AddrSpace);
1022 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
1023 "Layout of constant struct may be incorrect!");
1026 void AsmPrinter::EmitGlobalConstantFP(const ConstantFP *CFP,
1027 unsigned AddrSpace) {
1028 // FP Constants are printed as integer constants to avoid losing
1030 const TargetData *TD = TM.getTargetData();
1031 if (CFP->getType() == Type::DoubleTy) {
1032 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
1033 uint64_t i = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
1034 if (TAI->getData64bitsDirective(AddrSpace)) {
1035 O << TAI->getData64bitsDirective(AddrSpace) << i;
1037 O << '\t' << TAI->getCommentString() << " double value: " << Val;
1039 } else if (TD->isBigEndian()) {
1040 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
1042 O << '\t' << TAI->getCommentString()
1043 << " double most significant word " << Val;
1045 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
1047 O << '\t' << TAI->getCommentString()
1048 << " double least significant word " << Val;
1051 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
1053 O << '\t' << TAI->getCommentString()
1054 << " double least significant word " << Val;
1056 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
1058 O << '\t' << TAI->getCommentString()
1059 << " double most significant word " << Val;
1063 } else if (CFP->getType() == Type::FloatTy) {
1064 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
1065 O << TAI->getData32bitsDirective(AddrSpace)
1066 << CFP->getValueAPF().bitcastToAPInt().getZExtValue();
1068 O << '\t' << TAI->getCommentString() << " float " << Val;
1071 } else if (CFP->getType() == Type::X86_FP80Ty) {
1072 // all long double variants are printed as hex
1073 // api needed to prevent premature destruction
1074 APInt api = CFP->getValueAPF().bitcastToAPInt();
1075 const uint64_t *p = api.getRawData();
1076 // Convert to double so we can print the approximate val as a comment.
1077 APFloat DoubleVal = CFP->getValueAPF();
1079 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
1081 if (TD->isBigEndian()) {
1082 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
1084 O << '\t' << TAI->getCommentString()
1085 << " long double most significant halfword of ~"
1086 << DoubleVal.convertToDouble();
1088 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
1090 O << '\t' << TAI->getCommentString() << " long double next halfword";
1092 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
1094 O << '\t' << TAI->getCommentString() << " long double next halfword";
1096 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
1098 O << '\t' << TAI->getCommentString() << " long double next halfword";
1100 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
1102 O << '\t' << TAI->getCommentString()
1103 << " long double least significant halfword";
1106 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
1108 O << '\t' << TAI->getCommentString()
1109 << " long double least significant halfword of ~"
1110 << DoubleVal.convertToDouble();
1112 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
1114 O << '\t' << TAI->getCommentString()
1115 << " long double next halfword";
1117 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
1119 O << '\t' << TAI->getCommentString()
1120 << " long double next halfword";
1122 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
1124 O << '\t' << TAI->getCommentString()
1125 << " long double next halfword";
1127 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
1129 O << '\t' << TAI->getCommentString()
1130 << " long double most significant halfword";
1133 EmitZeros(TD->getTypeAllocSize(Type::X86_FP80Ty) -
1134 TD->getTypeStoreSize(Type::X86_FP80Ty), AddrSpace);
1136 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1137 // all long double variants are printed as hex
1138 // api needed to prevent premature destruction
1139 APInt api = CFP->getValueAPF().bitcastToAPInt();
1140 const uint64_t *p = api.getRawData();
1141 if (TD->isBigEndian()) {
1142 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
1144 O << '\t' << TAI->getCommentString()
1145 << " long double most significant word";
1147 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
1149 O << '\t' << TAI->getCommentString()
1150 << " long double next word";
1152 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
1154 O << '\t' << TAI->getCommentString()
1155 << " long double next word";
1157 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
1159 O << '\t' << TAI->getCommentString()
1160 << " long double least significant word";
1163 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
1165 O << '\t' << TAI->getCommentString()
1166 << " long double least significant word";
1168 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
1170 O << '\t' << TAI->getCommentString()
1171 << " long double next word";
1173 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
1175 O << '\t' << TAI->getCommentString()
1176 << " long double next word";
1178 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
1180 O << '\t' << TAI->getCommentString()
1181 << " long double most significant word";
1185 } else assert(0 && "Floating point constant type not handled");
1188 void AsmPrinter::EmitGlobalConstantLargeInt(const ConstantInt *CI,
1189 unsigned AddrSpace) {
1190 const TargetData *TD = TM.getTargetData();
1191 unsigned BitWidth = CI->getBitWidth();
1192 assert(isPowerOf2_32(BitWidth) &&
1193 "Non-power-of-2-sized integers not handled!");
1195 // We don't expect assemblers to support integer data directives
1196 // for more than 64 bits, so we emit the data in at most 64-bit
1197 // quantities at a time.
1198 const uint64_t *RawData = CI->getValue().getRawData();
1199 for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
1201 if (TD->isBigEndian())
1202 Val = RawData[e - i - 1];
1206 if (TAI->getData64bitsDirective(AddrSpace))
1207 O << TAI->getData64bitsDirective(AddrSpace) << Val << '\n';
1208 else if (TD->isBigEndian()) {
1209 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
1211 O << '\t' << TAI->getCommentString()
1212 << " Double-word most significant word " << Val;
1214 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
1216 O << '\t' << TAI->getCommentString()
1217 << " Double-word least significant word " << Val;
1220 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
1222 O << '\t' << TAI->getCommentString()
1223 << " Double-word least significant word " << Val;
1225 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
1227 O << '\t' << TAI->getCommentString()
1228 << " Double-word most significant word " << Val;
1234 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
1235 void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) {
1236 const TargetData *TD = TM.getTargetData();
1237 const Type *type = CV->getType();
1238 unsigned Size = TD->getTypeAllocSize(type);
1240 if (CV->isNullValue() || isa<UndefValue>(CV)) {
1241 EmitZeros(Size, AddrSpace);
1243 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
1244 EmitGlobalConstantArray(CVA , AddrSpace);
1246 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
1247 EmitGlobalConstantStruct(CVS, AddrSpace);
1249 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
1250 EmitGlobalConstantFP(CFP, AddrSpace);
1252 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1253 // Small integers are handled below; large integers are handled here.
1255 EmitGlobalConstantLargeInt(CI, AddrSpace);
1258 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1259 EmitGlobalConstantVector(CP);
1263 printDataDirective(type, AddrSpace);
1264 EmitConstantValueOnly(CV);
1266 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1268 CI->getValue().toStringUnsigned(S, 16);
1269 O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
1275 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1276 // Target doesn't support this yet!
1280 /// PrintSpecial - Print information related to the specified machine instr
1281 /// that is independent of the operand, and may be independent of the instr
1282 /// itself. This can be useful for portably encoding the comment character
1283 /// or other bits of target-specific knowledge into the asmstrings. The
1284 /// syntax used is ${:comment}. Targets can override this to add support
1285 /// for their own strange codes.
1286 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) const {
1287 if (!strcmp(Code, "private")) {
1288 O << TAI->getPrivateGlobalPrefix();
1289 } else if (!strcmp(Code, "comment")) {
1291 O << TAI->getCommentString();
1292 } else if (!strcmp(Code, "uid")) {
1293 // Assign a unique ID to this machine instruction.
1294 static const MachineInstr *LastMI = 0;
1295 static const Function *F = 0;
1296 static unsigned Counter = 0U-1;
1298 // Comparing the address of MI isn't sufficient, because machineinstrs may
1299 // be allocated to the same address across functions.
1300 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1302 // If this is a new machine instruction, bump the counter.
1303 if (LastMI != MI || F != ThisF) {
1310 cerr << "Unknown special formatter '" << Code
1311 << "' for machine instr: " << *MI;
1316 /// processDebugLoc - Processes the debug information of each machine
1317 /// instruction's DebugLoc.
1318 void AsmPrinter::processDebugLoc(DebugLoc DL) {
1319 if (TAI->doesSupportDebugInformation() && DW->ShouldEmitDwarfDebug()) {
1320 if (!DL.isUnknown()) {
1321 static DebugLocTuple PrevDLT(0, ~0U, ~0U);
1322 DebugLocTuple CurDLT = MF->getDebugLocTuple(DL);
1324 if (CurDLT.CompileUnit != 0 && PrevDLT != CurDLT)
1325 printLabel(DW->RecordSourceLine(CurDLT.Line, CurDLT.Col,
1326 DICompileUnit(CurDLT.CompileUnit)));
1333 /// printInlineAsm - This method formats and prints the specified machine
1334 /// instruction that is an inline asm.
1335 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1336 unsigned NumOperands = MI->getNumOperands();
1338 // Count the number of register definitions.
1339 unsigned NumDefs = 0;
1340 for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
1342 assert(NumDefs != NumOperands-1 && "No asm string?");
1344 assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
1346 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1347 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1349 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1350 // These are useful to see where empty asm's wound up.
1351 if (AsmStr[0] == 0) {
1352 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1356 O << TAI->getInlineAsmStart() << "\n\t";
1358 // The variant of the current asmprinter.
1359 int AsmPrinterVariant = TAI->getAssemblerDialect();
1361 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1362 const char *LastEmitted = AsmStr; // One past the last character emitted.
1364 while (*LastEmitted) {
1365 switch (*LastEmitted) {
1367 // Not a special case, emit the string section literally.
1368 const char *LiteralEnd = LastEmitted+1;
1369 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1370 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1372 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1373 O.write(LastEmitted, LiteralEnd-LastEmitted);
1374 LastEmitted = LiteralEnd;
1378 ++LastEmitted; // Consume newline character.
1379 O << '\n'; // Indent code with newline.
1382 ++LastEmitted; // Consume '$' character.
1386 switch (*LastEmitted) {
1387 default: Done = false; break;
1388 case '$': // $$ -> $
1389 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1391 ++LastEmitted; // Consume second '$' character.
1393 case '(': // $( -> same as GCC's { character.
1394 ++LastEmitted; // Consume '(' character.
1395 if (CurVariant != -1) {
1396 cerr << "Nested variants found in inline asm string: '"
1400 CurVariant = 0; // We're in the first variant now.
1403 ++LastEmitted; // consume '|' character.
1404 if (CurVariant == -1)
1405 O << '|'; // this is gcc's behavior for | outside a variant
1407 ++CurVariant; // We're in the next variant.
1409 case ')': // $) -> same as GCC's } char.
1410 ++LastEmitted; // consume ')' character.
1411 if (CurVariant == -1)
1412 O << '}'; // this is gcc's behavior for } outside a variant
1419 bool HasCurlyBraces = false;
1420 if (*LastEmitted == '{') { // ${variable}
1421 ++LastEmitted; // Consume '{' character.
1422 HasCurlyBraces = true;
1425 // If we have ${:foo}, then this is not a real operand reference, it is a
1426 // "magic" string reference, just like in .td files. Arrange to call
1428 if (HasCurlyBraces && *LastEmitted == ':') {
1430 const char *StrStart = LastEmitted;
1431 const char *StrEnd = strchr(StrStart, '}');
1433 cerr << "Unterminated ${:foo} operand in inline asm string: '"
1438 std::string Val(StrStart, StrEnd);
1439 PrintSpecial(MI, Val.c_str());
1440 LastEmitted = StrEnd+1;
1444 const char *IDStart = LastEmitted;
1447 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1448 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1449 cerr << "Bad $ operand number in inline asm string: '"
1453 LastEmitted = IDEnd;
1455 char Modifier[2] = { 0, 0 };
1457 if (HasCurlyBraces) {
1458 // If we have curly braces, check for a modifier character. This
1459 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1460 if (*LastEmitted == ':') {
1461 ++LastEmitted; // Consume ':' character.
1462 if (*LastEmitted == 0) {
1463 cerr << "Bad ${:} expression in inline asm string: '"
1468 Modifier[0] = *LastEmitted;
1469 ++LastEmitted; // Consume modifier character.
1472 if (*LastEmitted != '}') {
1473 cerr << "Bad ${} expression in inline asm string: '"
1477 ++LastEmitted; // Consume '}' character.
1480 if ((unsigned)Val >= NumOperands-1) {
1481 cerr << "Invalid $ operand number in inline asm string: '"
1486 // Okay, we finally have a value number. Ask the target to print this
1488 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1493 // Scan to find the machine operand number for the operand.
1494 for (; Val; --Val) {
1495 if (OpNo >= MI->getNumOperands()) break;
1496 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1497 OpNo += InlineAsm::getNumOperandRegisters(OpFlags) + 1;
1500 if (OpNo >= MI->getNumOperands()) {
1503 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1504 ++OpNo; // Skip over the ID number.
1506 if (Modifier[0]=='l') // labels are target independent
1507 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1508 false, false, false);
1510 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1511 if ((OpFlags & 7) == 4) {
1512 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1513 Modifier[0] ? Modifier : 0);
1515 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1516 Modifier[0] ? Modifier : 0);
1521 cerr << "Invalid operand found in inline asm: '"
1531 O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1534 /// printImplicitDef - This method prints the specified machine instruction
1535 /// that is an implicit def.
1536 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1538 O << '\t' << TAI->getCommentString() << " implicit-def: "
1539 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1542 /// printLabel - This method prints a local label used by debug and
1543 /// exception handling tables.
1544 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1545 printLabel(MI->getOperand(0).getImm());
1548 void AsmPrinter::printLabel(unsigned Id) const {
1549 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1552 /// printDeclare - This method prints a local variable declaration used by
1554 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1555 /// entry into dwarf table.
1556 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1557 unsigned FI = MI->getOperand(0).getIndex();
1558 GlobalValue *GV = MI->getOperand(1).getGlobal();
1559 DW->RecordVariable(cast<GlobalVariable>(GV), FI, MI);
1562 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1563 /// instruction, using the specified assembler variant. Targets should
1564 /// overried this to format as appropriate.
1565 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1566 unsigned AsmVariant, const char *ExtraCode) {
1567 // Target doesn't support this yet!
1571 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1572 unsigned AsmVariant,
1573 const char *ExtraCode) {
1574 // Target doesn't support this yet!
1578 /// printBasicBlockLabel - This method prints the label for the specified
1579 /// MachineBasicBlock
1580 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1583 bool printComment) const {
1585 unsigned Align = MBB->getAlignment();
1587 EmitAlignment(Log2_32(Align));
1590 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1591 << MBB->getNumber();
1594 if (printComment && MBB->getBasicBlock())
1595 O << '\t' << TAI->getCommentString() << ' '
1596 << MBB->getBasicBlock()->getNameStart();
1599 /// printPICJumpTableSetLabel - This method prints a set label for the
1600 /// specified MachineBasicBlock for a jumptable entry.
1601 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1602 const MachineBasicBlock *MBB) const {
1603 if (!TAI->getSetDirective())
1606 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1607 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1608 printBasicBlockLabel(MBB, false, false, false);
1609 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1610 << '_' << uid << '\n';
1613 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1614 const MachineBasicBlock *MBB) const {
1615 if (!TAI->getSetDirective())
1618 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1619 << getFunctionNumber() << '_' << uid << '_' << uid2
1620 << "_set_" << MBB->getNumber() << ',';
1621 printBasicBlockLabel(MBB, false, false, false);
1622 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1623 << '_' << uid << '_' << uid2 << '\n';
1626 /// printDataDirective - This method prints the asm directive for the
1628 void AsmPrinter::printDataDirective(const Type *type, unsigned AddrSpace) {
1629 const TargetData *TD = TM.getTargetData();
1630 switch (type->getTypeID()) {
1631 case Type::IntegerTyID: {
1632 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1634 O << TAI->getData8bitsDirective(AddrSpace);
1635 else if (BitWidth <= 16)
1636 O << TAI->getData16bitsDirective(AddrSpace);
1637 else if (BitWidth <= 32)
1638 O << TAI->getData32bitsDirective(AddrSpace);
1639 else if (BitWidth <= 64) {
1640 assert(TAI->getData64bitsDirective(AddrSpace) &&
1641 "Target cannot handle 64-bit constant exprs!");
1642 O << TAI->getData64bitsDirective(AddrSpace);
1644 assert(0 && "Target cannot handle given data directive width!");
1648 case Type::PointerTyID:
1649 if (TD->getPointerSize() == 8) {
1650 assert(TAI->getData64bitsDirective(AddrSpace) &&
1651 "Target cannot handle 64-bit pointer exprs!");
1652 O << TAI->getData64bitsDirective(AddrSpace);
1653 } else if (TD->getPointerSize() == 2) {
1654 O << TAI->getData16bitsDirective(AddrSpace);
1655 } else if (TD->getPointerSize() == 1) {
1656 O << TAI->getData8bitsDirective(AddrSpace);
1658 O << TAI->getData32bitsDirective(AddrSpace);
1661 case Type::FloatTyID: case Type::DoubleTyID:
1662 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1663 assert (0 && "Should have already output floating point constant.");
1665 assert (0 && "Can't handle printing this type of thing");
1670 void AsmPrinter::printSuffixedName(const char *Name, const char *Suffix,
1671 const char *Prefix) {
1674 O << TAI->getPrivateGlobalPrefix();
1675 if (Prefix) O << Prefix;
1687 void AsmPrinter::printSuffixedName(const std::string &Name, const char* Suffix) {
1688 printSuffixedName(Name.c_str(), Suffix);
1691 void AsmPrinter::printVisibility(const std::string& Name,
1692 unsigned Visibility) const {
1693 if (Visibility == GlobalValue::HiddenVisibility) {
1694 if (const char *Directive = TAI->getHiddenDirective())
1695 O << Directive << Name << '\n';
1696 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1697 if (const char *Directive = TAI->getProtectedDirective())
1698 O << Directive << Name << '\n';
1702 void AsmPrinter::printOffset(int64_t Offset) const {
1705 else if (Offset < 0)
1709 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
1710 if (!S->usesMetadata())
1713 gcp_iterator GCPI = GCMetadataPrinters.find(S);
1714 if (GCPI != GCMetadataPrinters.end())
1715 return GCPI->second;
1717 const char *Name = S->getName().c_str();
1719 for (GCMetadataPrinterRegistry::iterator
1720 I = GCMetadataPrinterRegistry::begin(),
1721 E = GCMetadataPrinterRegistry::end(); I != E; ++I)
1722 if (strcmp(Name, I->getName()) == 0) {
1723 GCMetadataPrinter *GMP = I->instantiate();
1725 GCMetadataPrinters.insert(std::make_pair(S, GMP));
1729 cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";