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/Support/Mangler.h"
24 #include "llvm/Support/raw_ostream.h"
25 #include "llvm/Target/TargetAsmInfo.h"
26 #include "llvm/Target/TargetData.h"
27 #include "llvm/Target/TargetLowering.h"
28 #include "llvm/Target/TargetMachine.h"
29 #include "llvm/Target/TargetOptions.h"
30 #include "llvm/Target/TargetRegisterInfo.h"
31 #include "llvm/ADT/SmallPtrSet.h"
32 #include "llvm/ADT/SmallString.h"
33 #include "llvm/ADT/StringExtras.h"
37 char AsmPrinter::ID = 0;
38 AsmPrinter::AsmPrinter(raw_ostream &o, TargetMachine &tm,
39 const TargetAsmInfo *T)
40 : MachineFunctionPass(&ID), FunctionNumber(0), O(o),
41 TM(tm), TAI(T), TRI(tm.getRegisterInfo()),
42 IsInTextSection(false)
45 AsmPrinter::~AsmPrinter() {
46 for (gcp_iterator I = GCMetadataPrinters.begin(),
47 E = GCMetadataPrinters.end(); I != E; ++I)
51 /// SwitchToTextSection - Switch to the specified text section of the executable
52 /// if we are not already in it!
54 void AsmPrinter::SwitchToTextSection(const char *NewSection,
55 const GlobalValue *GV) {
57 if (GV && GV->hasSection())
58 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
62 // If we're already in this section, we're done.
63 if (CurrentSection == NS) return;
65 // Close the current section, if applicable.
66 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
67 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
71 if (!CurrentSection.empty())
72 O << CurrentSection << TAI->getTextSectionStartSuffix() << '\n';
74 IsInTextSection = true;
77 /// SwitchToDataSection - Switch to the specified data section of the executable
78 /// if we are not already in it!
80 void AsmPrinter::SwitchToDataSection(const char *NewSection,
81 const GlobalValue *GV) {
83 if (GV && GV->hasSection())
84 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
88 // If we're already in this section, we're done.
89 if (CurrentSection == NS) return;
91 // Close the current section, if applicable.
92 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
93 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
97 if (!CurrentSection.empty())
98 O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
100 IsInTextSection = false;
103 /// SwitchToSection - Switch to the specified section of the executable if we
104 /// are not already in it!
105 void AsmPrinter::SwitchToSection(const Section* NS) {
106 const std::string& NewSection = NS->getName();
108 // If we're already in this section, we're done.
109 if (CurrentSection == NewSection) return;
111 // Close the current section, if applicable.
112 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
113 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
115 // FIXME: Make CurrentSection a Section* in the future
116 CurrentSection = NewSection;
117 CurrentSection_ = NS;
119 if (!CurrentSection.empty()) {
120 // If section is named we need to switch into it via special '.section'
121 // directive and also append funky flags. Otherwise - section name is just
122 // some magic assembler directive.
124 O << TAI->getSwitchToSectionDirective()
126 << TAI->getSectionFlags(NS->getFlags());
129 O << TAI->getDataSectionStartSuffix() << '\n';
132 IsInTextSection = (NS->getFlags() & SectionFlags::Code);
135 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
136 MachineFunctionPass::getAnalysisUsage(AU);
137 AU.addRequired<GCModuleInfo>();
140 bool AsmPrinter::doInitialization(Module &M) {
141 Mang = new Mangler(M, TAI->getGlobalPrefix());
143 GCModuleInfo *MI = getAnalysisToUpdate<GCModuleInfo>();
144 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
146 if (TAI->hasSingleParameterDotFile()) {
147 /* Very minimal debug info. It is ignored if we emit actual
148 debug info. If we don't, this at helps the user find where
149 a function came from. */
150 O << "\t.file\t\"" << M.getModuleIdentifier() << "\"\n";
153 for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
154 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
155 MP->beginAssembly(O, *this, *TAI);
157 if (!M.getModuleInlineAsm().empty())
158 O << TAI->getCommentString() << " Start of file scope inline assembly\n"
159 << M.getModuleInlineAsm()
160 << '\n' << TAI->getCommentString()
161 << " End of file scope inline assembly\n";
163 SwitchToDataSection(""); // Reset back to no section.
165 MMI = getAnalysisToUpdate<MachineModuleInfo>();
166 if (MMI) MMI->AnalyzeModule(M);
171 bool AsmPrinter::doFinalization(Module &M) {
172 if (TAI->getWeakRefDirective()) {
173 if (!ExtWeakSymbols.empty())
174 SwitchToDataSection("");
176 for (std::set<const GlobalValue*>::iterator i = ExtWeakSymbols.begin(),
177 e = ExtWeakSymbols.end(); i != e; ++i) {
178 const GlobalValue *GV = *i;
179 std::string Name = Mang->getValueName(GV);
180 O << TAI->getWeakRefDirective() << Name << '\n';
184 if (TAI->getSetDirective()) {
185 if (!M.alias_empty())
186 SwitchToSection(TAI->getTextSection());
189 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
191 std::string Name = Mang->getValueName(I);
194 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
195 Target = Mang->getValueName(GV);
197 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
198 O << "\t.globl\t" << Name << '\n';
199 else if (I->hasWeakLinkage())
200 O << TAI->getWeakRefDirective() << Name << '\n';
201 else if (!I->hasInternalLinkage())
202 assert(0 && "Invalid alias linkage");
204 printVisibility(Name, I->getVisibility());
206 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
208 // If the aliasee has external weak linkage it can be referenced only by
209 // alias itself. In this case it can be not in ExtWeakSymbols list. Emit
210 // weak reference in such case.
211 if (GV->hasExternalWeakLinkage()) {
212 if (TAI->getWeakRefDirective())
213 O << TAI->getWeakRefDirective() << Target << '\n';
215 O << "\t.globl\t" << Target << '\n';
220 GCModuleInfo *MI = getAnalysisToUpdate<GCModuleInfo>();
221 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
222 for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
223 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
224 MP->finishAssembly(O, *this, *TAI);
226 // If we don't have any trampolines, then we don't require stack memory
227 // to be executable. Some targets have a directive to declare this.
228 Function* InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
229 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
230 if (TAI->getNonexecutableStackDirective())
231 O << TAI->getNonexecutableStackDirective() << '\n';
233 delete Mang; Mang = 0;
237 std::string AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) {
238 assert(MF && "No machine function?");
239 std::string Name = MF->getFunction()->getName();
241 Name = Mang->getValueName(MF->getFunction());
242 return Mang->makeNameProper(TAI->getEHGlobalPrefix() +
243 Name + ".eh", TAI->getGlobalPrefix());
246 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
247 // What's my mangled name?
248 CurrentFnName = Mang->getValueName(MF.getFunction());
249 IncrementFunctionNumber();
252 /// EmitConstantPool - Print to the current output stream assembly
253 /// representations of the constants in the constant pool MCP. This is
254 /// used to print out constants which have been "spilled to memory" by
255 /// the code generator.
257 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
258 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
259 if (CP.empty()) return;
261 // Calculate sections for constant pool entries. We collect entries to go into
262 // the same section together to reduce amount of section switch statements.
264 std::multimap<const Section*,
265 std::pair<MachineConstantPoolEntry, unsigned> > CPMap;
267 SmallPtrSet<const Section*, 5> Sections;
269 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
270 MachineConstantPoolEntry CPE = CP[i];
271 const Section* S = TAI->SelectSectionForMachineConst(CPE.getType());
272 CPs.insert(std::make_pair(S, std::make_pair(CPE, i)));
276 // Now print stuff into the calculated sections.
277 for (SmallPtrSet<const Section*, 5>::iterator IS = Sections.begin(),
278 ES = Sections.end(); IS != ES; ++IS) {
279 SwitchToSection(*IS);
280 EmitAlignment(MCP->getConstantPoolAlignment());
282 std::pair<CPMap::iterator, CPMap::iterator> II = CPs.equal_range(*IS);
283 for (CPMap::iterator I = II.first, E = II.second; I != E; ++I) {
284 CPMap::iterator J = next(I);
285 MachineConstantPoolEntry Entry = I->second.first;
286 unsigned index = I->second.second;
288 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
289 << index << ":\t\t\t\t\t";
290 // O << TAI->getCommentString() << ' ' <<
291 // WriteTypeSymbolic(O, CP[i].first.getType(), 0);
293 if (Entry.isMachineConstantPoolEntry())
294 EmitMachineConstantPoolValue(Entry.Val.MachineCPVal);
296 EmitGlobalConstant(Entry.Val.ConstVal);
298 // Emit inter-object padding for alignment.
300 const Type *Ty = Entry.getType();
301 unsigned EntSize = TM.getTargetData()->getTypePaddedSize(Ty);
302 unsigned ValEnd = Entry.getOffset() + EntSize;
303 EmitZeros(J->second.first.getOffset()-ValEnd);
309 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
310 /// by the current function to the current output stream.
312 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
313 MachineFunction &MF) {
314 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
315 if (JT.empty()) return;
317 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
319 // Pick the directive to use to print the jump table entries, and switch to
320 // the appropriate section.
321 TargetLowering *LoweringInfo = TM.getTargetLowering();
323 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
324 const Function *F = MF.getFunction();
325 unsigned SectionFlags = TAI->SectionFlagsForGlobal(F);
326 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
327 !JumpTableDataSection ||
328 SectionFlags & SectionFlags::Linkonce) {
329 // In PIC mode, we need to emit the jump table to the same section as the
330 // function body itself, otherwise the label differences won't make sense.
331 // We should also do if the section name is NULL or function is declared in
332 // discardable section.
333 SwitchToSection(TAI->SectionForGlobal(F));
335 SwitchToDataSection(JumpTableDataSection);
338 EmitAlignment(Log2_32(MJTI->getAlignment()));
340 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
341 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
343 // If this jump table was deleted, ignore it.
344 if (JTBBs.empty()) continue;
346 // For PIC codegen, if possible we want to use the SetDirective to reduce
347 // the number of relocations the assembler will generate for the jump table.
348 // Set directives are all printed before the jump table itself.
349 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
350 if (TAI->getSetDirective() && IsPic)
351 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
352 if (EmittedSets.insert(JTBBs[ii]))
353 printPICJumpTableSetLabel(i, JTBBs[ii]);
355 // On some targets (e.g. darwin) we want to emit two consequtive labels
356 // before each jump table. The first label is never referenced, but tells
357 // the assembler and linker the extents of the jump table object. The
358 // second label is actually referenced by the code.
359 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
360 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
362 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
363 << '_' << i << ":\n";
365 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
366 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
372 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
373 const MachineBasicBlock *MBB,
374 unsigned uid) const {
375 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
377 // Use JumpTableDirective otherwise honor the entry size from the jump table
379 const char *JTEntryDirective = TAI->getJumpTableDirective();
380 bool HadJTEntryDirective = JTEntryDirective != NULL;
381 if (!HadJTEntryDirective) {
382 JTEntryDirective = MJTI->getEntrySize() == 4 ?
383 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
386 O << JTEntryDirective << ' ';
388 // If we have emitted set directives for the jump table entries, print
389 // them rather than the entries themselves. If we're emitting PIC, then
390 // emit the table entries as differences between two text section labels.
391 // If we're emitting non-PIC code, then emit the entries as direct
392 // references to the target basic blocks.
394 if (TAI->getSetDirective()) {
395 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
396 << '_' << uid << "_set_" << MBB->getNumber();
398 printBasicBlockLabel(MBB, false, false, false);
399 // If the arch uses custom Jump Table directives, don't calc relative to
401 if (!HadJTEntryDirective)
402 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
403 << getFunctionNumber() << '_' << uid;
406 printBasicBlockLabel(MBB, false, false, false);
411 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
412 /// special global used by LLVM. If so, emit it and return true, otherwise
413 /// do nothing and return false.
414 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
415 if (GV->getName() == "llvm.used") {
416 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
417 EmitLLVMUsedList(GV->getInitializer());
421 // Ignore debug and non-emitted data.
422 if (GV->getSection() == "llvm.metadata") return true;
424 if (!GV->hasAppendingLinkage()) return false;
426 assert(GV->hasInitializer() && "Not a special LLVM global!");
428 const TargetData *TD = TM.getTargetData();
429 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
430 if (GV->getName() == "llvm.global_ctors" && GV->use_empty()) {
431 SwitchToDataSection(TAI->getStaticCtorsSection());
432 EmitAlignment(Align, 0);
433 EmitXXStructorList(GV->getInitializer());
437 if (GV->getName() == "llvm.global_dtors" && GV->use_empty()) {
438 SwitchToDataSection(TAI->getStaticDtorsSection());
439 EmitAlignment(Align, 0);
440 EmitXXStructorList(GV->getInitializer());
447 /// findGlobalValue - if CV is an expression equivalent to a single
448 /// global value, return that value.
449 const GlobalValue * AsmPrinter::findGlobalValue(const Constant *CV) {
450 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
452 else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
453 const TargetData *TD = TM.getTargetData();
454 unsigned Opcode = CE->getOpcode();
456 case Instruction::GetElementPtr: {
457 const Constant *ptrVal = CE->getOperand(0);
458 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
459 if (TD->getIndexedOffset(ptrVal->getType(), &idxVec[0], idxVec.size()))
461 return findGlobalValue(ptrVal);
463 case Instruction::BitCast:
464 return findGlobalValue(CE->getOperand(0));
472 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
473 /// global in the specified llvm.used list for which emitUsedDirectiveFor
474 /// is true, as being used with this directive.
476 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
477 const char *Directive = TAI->getUsedDirective();
479 // Should be an array of 'sbyte*'.
480 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
481 if (InitList == 0) return;
483 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
484 const GlobalValue *GV = findGlobalValue(InitList->getOperand(i));
485 if (TAI->emitUsedDirectiveFor(GV, Mang)) {
487 EmitConstantValueOnly(InitList->getOperand(i));
493 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
494 /// function pointers, ignoring the init priority.
495 void AsmPrinter::EmitXXStructorList(Constant *List) {
496 // Should be an array of '{ int, void ()* }' structs. The first value is the
497 // init priority, which we ignore.
498 if (!isa<ConstantArray>(List)) return;
499 ConstantArray *InitList = cast<ConstantArray>(List);
500 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
501 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
502 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
504 if (CS->getOperand(1)->isNullValue())
505 return; // Found a null terminator, exit printing.
506 // Emit the function pointer.
507 EmitGlobalConstant(CS->getOperand(1));
511 /// getGlobalLinkName - Returns the asm/link name of of the specified
512 /// global variable. Should be overridden by each target asm printer to
513 /// generate the appropriate value.
514 const std::string AsmPrinter::getGlobalLinkName(const GlobalVariable *GV) const{
515 std::string LinkName;
517 if (isa<Function>(GV)) {
518 LinkName += TAI->getFunctionAddrPrefix();
519 LinkName += Mang->getValueName(GV);
520 LinkName += TAI->getFunctionAddrSuffix();
522 LinkName += TAI->getGlobalVarAddrPrefix();
523 LinkName += Mang->getValueName(GV);
524 LinkName += TAI->getGlobalVarAddrSuffix();
530 /// EmitExternalGlobal - Emit the external reference to a global variable.
531 /// Should be overridden if an indirect reference should be used.
532 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
533 O << getGlobalLinkName(GV);
538 //===----------------------------------------------------------------------===//
539 /// LEB 128 number encoding.
541 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
542 /// representing an unsigned leb128 value.
543 void AsmPrinter::PrintULEB128(unsigned Value) const {
546 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
548 if (Value) Byte |= 0x80;
549 O << "0x" << utohex_buffer(Byte, Buffer+20);
550 if (Value) O << ", ";
554 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
555 /// representing a signed leb128 value.
556 void AsmPrinter::PrintSLEB128(int Value) const {
557 int Sign = Value >> (8 * sizeof(Value) - 1);
562 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
564 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
565 if (IsMore) Byte |= 0x80;
566 O << "0x" << utohex_buffer(Byte, Buffer+20);
567 if (IsMore) O << ", ";
571 //===--------------------------------------------------------------------===//
572 // Emission and print routines
575 /// PrintHex - Print a value as a hexidecimal value.
577 void AsmPrinter::PrintHex(int Value) const {
579 O << "0x" << utohex_buffer(static_cast<unsigned>(Value), Buffer+20);
582 /// EOL - Print a newline character to asm stream. If a comment is present
583 /// then it will be printed first. Comments should not contain '\n'.
584 void AsmPrinter::EOL() const {
588 void AsmPrinter::EOL(const std::string &Comment) const {
589 if (VerboseAsm && !Comment.empty()) {
591 << TAI->getCommentString()
598 void AsmPrinter::EOL(const char* Comment) const {
599 if (VerboseAsm && *Comment) {
601 << TAI->getCommentString()
608 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
609 /// unsigned leb128 value.
610 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
611 if (TAI->hasLEB128()) {
615 O << TAI->getData8bitsDirective();
620 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
621 /// signed leb128 value.
622 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
623 if (TAI->hasLEB128()) {
627 O << TAI->getData8bitsDirective();
632 /// EmitInt8 - Emit a byte directive and value.
634 void AsmPrinter::EmitInt8(int Value) const {
635 O << TAI->getData8bitsDirective();
636 PrintHex(Value & 0xFF);
639 /// EmitInt16 - Emit a short directive and value.
641 void AsmPrinter::EmitInt16(int Value) const {
642 O << TAI->getData16bitsDirective();
643 PrintHex(Value & 0xFFFF);
646 /// EmitInt32 - Emit a long directive and value.
648 void AsmPrinter::EmitInt32(int Value) const {
649 O << TAI->getData32bitsDirective();
653 /// EmitInt64 - Emit a long long directive and value.
655 void AsmPrinter::EmitInt64(uint64_t Value) const {
656 if (TAI->getData64bitsDirective()) {
657 O << TAI->getData64bitsDirective();
660 if (TM.getTargetData()->isBigEndian()) {
661 EmitInt32(unsigned(Value >> 32)); O << '\n';
662 EmitInt32(unsigned(Value));
664 EmitInt32(unsigned(Value)); O << '\n';
665 EmitInt32(unsigned(Value >> 32));
670 /// toOctal - Convert the low order bits of X into an octal digit.
672 static inline char toOctal(int X) {
676 /// printStringChar - Print a char, escaped if necessary.
678 static void printStringChar(raw_ostream &O, char C) {
681 } else if (C == '\\') {
683 } else if (isprint(C)) {
687 case '\b': O << "\\b"; break;
688 case '\f': O << "\\f"; break;
689 case '\n': O << "\\n"; break;
690 case '\r': O << "\\r"; break;
691 case '\t': O << "\\t"; break;
694 O << toOctal(C >> 6);
695 O << toOctal(C >> 3);
696 O << toOctal(C >> 0);
702 /// EmitString - Emit a string with quotes and a null terminator.
703 /// Special characters are emitted properly.
704 /// \literal (Eg. '\t') \endliteral
705 void AsmPrinter::EmitString(const std::string &String) const {
706 const char* AscizDirective = TAI->getAscizDirective();
710 O << TAI->getAsciiDirective();
712 for (unsigned i = 0, N = String.size(); i < N; ++i) {
713 unsigned char C = String[i];
714 printStringChar(O, C);
723 /// EmitFile - Emit a .file directive.
724 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
725 O << "\t.file\t" << Number << " \"";
726 for (unsigned i = 0, N = Name.size(); i < N; ++i) {
727 unsigned char C = Name[i];
728 printStringChar(O, C);
734 //===----------------------------------------------------------------------===//
736 // EmitAlignment - Emit an alignment directive to the specified power of
737 // two boundary. For example, if you pass in 3 here, you will get an 8
738 // byte alignment. If a global value is specified, and if that global has
739 // an explicit alignment requested, it will unconditionally override the
740 // alignment request. However, if ForcedAlignBits is specified, this value
741 // has final say: the ultimate alignment will be the max of ForcedAlignBits
742 // and the alignment computed with NumBits and the global.
746 // if (GV && GV->hasalignment) Align = GV->getalignment();
747 // Align = std::max(Align, ForcedAlignBits);
749 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
750 unsigned ForcedAlignBits,
751 bool UseFillExpr) const {
752 if (GV && GV->getAlignment())
753 NumBits = Log2_32(GV->getAlignment());
754 NumBits = std::max(NumBits, ForcedAlignBits);
756 if (NumBits == 0) return; // No need to emit alignment.
757 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
758 O << TAI->getAlignDirective() << NumBits;
760 unsigned FillValue = TAI->getTextAlignFillValue();
761 UseFillExpr &= IsInTextSection && FillValue;
770 /// EmitZeros - Emit a block of zeros.
772 void AsmPrinter::EmitZeros(uint64_t NumZeros) const {
774 if (TAI->getZeroDirective()) {
775 O << TAI->getZeroDirective() << NumZeros;
776 if (TAI->getZeroDirectiveSuffix())
777 O << TAI->getZeroDirectiveSuffix();
780 for (; NumZeros; --NumZeros)
781 O << TAI->getData8bitsDirective() << "0\n";
786 // Print out the specified constant, without a storage class. Only the
787 // constants valid in constant expressions can occur here.
788 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
789 if (CV->isNullValue() || isa<UndefValue>(CV))
791 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
792 O << CI->getZExtValue();
793 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
794 // This is a constant address for a global variable or function. Use the
795 // name of the variable or function as the address value, possibly
796 // decorating it with GlobalVarAddrPrefix/Suffix or
797 // FunctionAddrPrefix/Suffix (these all default to "" )
798 if (isa<Function>(GV)) {
799 O << TAI->getFunctionAddrPrefix()
800 << Mang->getValueName(GV)
801 << TAI->getFunctionAddrSuffix();
803 O << TAI->getGlobalVarAddrPrefix()
804 << Mang->getValueName(GV)
805 << TAI->getGlobalVarAddrSuffix();
807 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
808 const TargetData *TD = TM.getTargetData();
809 unsigned Opcode = CE->getOpcode();
811 case Instruction::GetElementPtr: {
812 // generate a symbolic expression for the byte address
813 const Constant *ptrVal = CE->getOperand(0);
814 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
815 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
819 EmitConstantValueOnly(ptrVal);
821 O << ") + " << Offset;
823 O << ") - " << -Offset;
825 EmitConstantValueOnly(ptrVal);
829 case Instruction::Trunc:
830 case Instruction::ZExt:
831 case Instruction::SExt:
832 case Instruction::FPTrunc:
833 case Instruction::FPExt:
834 case Instruction::UIToFP:
835 case Instruction::SIToFP:
836 case Instruction::FPToUI:
837 case Instruction::FPToSI:
838 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
840 case Instruction::BitCast:
841 return EmitConstantValueOnly(CE->getOperand(0));
843 case Instruction::IntToPtr: {
844 // Handle casts to pointers by changing them into casts to the appropriate
845 // integer type. This promotes constant folding and simplifies this code.
846 Constant *Op = CE->getOperand(0);
847 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
848 return EmitConstantValueOnly(Op);
852 case Instruction::PtrToInt: {
853 // Support only foldable casts to/from pointers that can be eliminated by
854 // changing the pointer to the appropriately sized integer type.
855 Constant *Op = CE->getOperand(0);
856 const Type *Ty = CE->getType();
858 // We can emit the pointer value into this slot if the slot is an
859 // integer slot greater or equal to the size of the pointer.
860 if (TD->getTypePaddedSize(Ty) >= TD->getTypePaddedSize(Op->getType()))
861 return EmitConstantValueOnly(Op);
864 EmitConstantValueOnly(Op);
865 APInt ptrMask = APInt::getAllOnesValue(TD->getTypePaddedSizeInBits(Ty));
868 ptrMask.toStringUnsigned(S);
869 O << ") & " << S.c_str() << ')';
872 case Instruction::Add:
873 case Instruction::Sub:
874 case Instruction::And:
875 case Instruction::Or:
876 case Instruction::Xor:
878 EmitConstantValueOnly(CE->getOperand(0));
881 case Instruction::Add:
884 case Instruction::Sub:
887 case Instruction::And:
890 case Instruction::Or:
893 case Instruction::Xor:
900 EmitConstantValueOnly(CE->getOperand(1));
904 assert(0 && "Unsupported operator!");
907 assert(0 && "Unknown constant value!");
911 /// printAsCString - Print the specified array as a C compatible string, only if
912 /// the predicate isString is true.
914 static void printAsCString(raw_ostream &O, const ConstantArray *CVA,
916 assert(CVA->isString() && "Array is not string compatible!");
919 for (unsigned i = 0; i != LastElt; ++i) {
921 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
922 printStringChar(O, C);
927 /// EmitString - Emit a zero-byte-terminated string constant.
929 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
930 unsigned NumElts = CVA->getNumOperands();
931 if (TAI->getAscizDirective() && NumElts &&
932 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
933 O << TAI->getAscizDirective();
934 printAsCString(O, CVA, NumElts-1);
936 O << TAI->getAsciiDirective();
937 printAsCString(O, CVA, NumElts);
942 void AsmPrinter::EmitGlobalConstantArray(const ConstantArray *CVA) {
943 if (CVA->isString()) {
945 } else { // Not a string. Print the values in successive locations
946 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
947 EmitGlobalConstant(CVA->getOperand(i));
951 void AsmPrinter::EmitGlobalConstantVector(const ConstantVector *CP) {
952 const VectorType *PTy = CP->getType();
954 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
955 EmitGlobalConstant(CP->getOperand(I));
958 void AsmPrinter::EmitGlobalConstantStruct(const ConstantStruct *CVS) {
959 // Print the fields in successive locations. Pad to align if needed!
960 const TargetData *TD = TM.getTargetData();
961 unsigned Size = TD->getTypePaddedSize(CVS->getType());
962 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
963 uint64_t sizeSoFar = 0;
964 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
965 const Constant* field = CVS->getOperand(i);
967 // Check if padding is needed and insert one or more 0s.
968 uint64_t fieldSize = TD->getTypePaddedSize(field->getType());
969 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
970 - cvsLayout->getElementOffset(i)) - fieldSize;
971 sizeSoFar += fieldSize + padSize;
973 // Now print the actual field value.
974 EmitGlobalConstant(field);
976 // Insert padding - this may include padding to increase the size of the
977 // current field up to the ABI size (if the struct is not packed) as well
978 // as padding to ensure that the next field starts at the right offset.
981 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
982 "Layout of constant struct may be incorrect!");
985 void AsmPrinter::EmitGlobalConstantFP(const ConstantFP *CFP) {
986 // FP Constants are printed as integer constants to avoid losing
988 const TargetData *TD = TM.getTargetData();
989 if (CFP->getType() == Type::DoubleTy) {
990 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
991 uint64_t i = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
992 if (TAI->getData64bitsDirective())
993 O << TAI->getData64bitsDirective() << i << '\t'
994 << TAI->getCommentString() << " double value: " << Val << '\n';
995 else if (TD->isBigEndian()) {
996 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
997 << '\t' << TAI->getCommentString()
998 << " double most significant word " << Val << '\n';
999 O << TAI->getData32bitsDirective() << unsigned(i)
1000 << '\t' << TAI->getCommentString()
1001 << " double least significant word " << Val << '\n';
1003 O << TAI->getData32bitsDirective() << unsigned(i)
1004 << '\t' << TAI->getCommentString()
1005 << " double least significant word " << Val << '\n';
1006 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
1007 << '\t' << TAI->getCommentString()
1008 << " double most significant word " << Val << '\n';
1011 } else if (CFP->getType() == Type::FloatTy) {
1012 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
1013 O << TAI->getData32bitsDirective()
1014 << CFP->getValueAPF().bitcastToAPInt().getZExtValue()
1015 << '\t' << TAI->getCommentString() << " float " << Val << '\n';
1017 } else if (CFP->getType() == Type::X86_FP80Ty) {
1018 // all long double variants are printed as hex
1019 // api needed to prevent premature destruction
1020 APInt api = CFP->getValueAPF().bitcastToAPInt();
1021 const uint64_t *p = api.getRawData();
1022 // Convert to double so we can print the approximate val as a comment.
1023 APFloat DoubleVal = CFP->getValueAPF();
1025 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
1027 if (TD->isBigEndian()) {
1028 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
1029 << '\t' << TAI->getCommentString()
1030 << " long double most significant halfword of ~"
1031 << DoubleVal.convertToDouble() << '\n';
1032 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
1033 << '\t' << TAI->getCommentString()
1034 << " long double next halfword\n";
1035 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
1036 << '\t' << TAI->getCommentString()
1037 << " long double next halfword\n";
1038 O << TAI->getData16bitsDirective() << uint16_t(p[0])
1039 << '\t' << TAI->getCommentString()
1040 << " long double next halfword\n";
1041 O << TAI->getData16bitsDirective() << uint16_t(p[1])
1042 << '\t' << TAI->getCommentString()
1043 << " long double least significant halfword\n";
1045 O << TAI->getData16bitsDirective() << uint16_t(p[1])
1046 << '\t' << TAI->getCommentString()
1047 << " long double least significant halfword of ~"
1048 << DoubleVal.convertToDouble() << '\n';
1049 O << TAI->getData16bitsDirective() << uint16_t(p[0])
1050 << '\t' << TAI->getCommentString()
1051 << " long double next halfword\n";
1052 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
1053 << '\t' << TAI->getCommentString()
1054 << " long double next halfword\n";
1055 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
1056 << '\t' << TAI->getCommentString()
1057 << " long double next halfword\n";
1058 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
1059 << '\t' << TAI->getCommentString()
1060 << " long double most significant halfword\n";
1062 EmitZeros(TD->getTypePaddedSize(Type::X86_FP80Ty) -
1063 TD->getTypeStoreSize(Type::X86_FP80Ty));
1065 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1066 // all long double variants are printed as hex
1067 // api needed to prevent premature destruction
1068 APInt api = CFP->getValueAPF().bitcastToAPInt();
1069 const uint64_t *p = api.getRawData();
1070 if (TD->isBigEndian()) {
1071 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1072 << '\t' << TAI->getCommentString()
1073 << " long double most significant word\n";
1074 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1075 << '\t' << TAI->getCommentString()
1076 << " long double next word\n";
1077 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1078 << '\t' << TAI->getCommentString()
1079 << " long double next word\n";
1080 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1081 << '\t' << TAI->getCommentString()
1082 << " long double least significant word\n";
1084 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1085 << '\t' << TAI->getCommentString()
1086 << " long double least significant word\n";
1087 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1088 << '\t' << TAI->getCommentString()
1089 << " long double next word\n";
1090 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1091 << '\t' << TAI->getCommentString()
1092 << " long double next word\n";
1093 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1094 << '\t' << TAI->getCommentString()
1095 << " long double most significant word\n";
1098 } else assert(0 && "Floating point constant type not handled");
1101 void AsmPrinter::EmitGlobalConstantLargeInt(const ConstantInt *CI) {
1102 const TargetData *TD = TM.getTargetData();
1103 unsigned BitWidth = CI->getBitWidth();
1104 assert(isPowerOf2_32(BitWidth) &&
1105 "Non-power-of-2-sized integers not handled!");
1107 // We don't expect assemblers to support integer data directives
1108 // for more than 64 bits, so we emit the data in at most 64-bit
1109 // quantities at a time.
1110 const uint64_t *RawData = CI->getValue().getRawData();
1111 for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
1113 if (TD->isBigEndian())
1114 Val = RawData[e - i - 1];
1118 if (TAI->getData64bitsDirective())
1119 O << TAI->getData64bitsDirective() << Val << '\n';
1120 else if (TD->isBigEndian()) {
1121 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1122 << '\t' << TAI->getCommentString()
1123 << " Double-word most significant word " << Val << '\n';
1124 O << TAI->getData32bitsDirective() << unsigned(Val)
1125 << '\t' << TAI->getCommentString()
1126 << " Double-word least significant word " << Val << '\n';
1128 O << TAI->getData32bitsDirective() << unsigned(Val)
1129 << '\t' << TAI->getCommentString()
1130 << " Double-word least significant word " << Val << '\n';
1131 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1132 << '\t' << TAI->getCommentString()
1133 << " Double-word most significant word " << Val << '\n';
1138 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
1139 void AsmPrinter::EmitGlobalConstant(const Constant *CV) {
1140 const TargetData *TD = TM.getTargetData();
1141 const Type *type = CV->getType();
1142 unsigned Size = TD->getTypePaddedSize(type);
1144 if (CV->isNullValue() || isa<UndefValue>(CV)) {
1147 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
1148 EmitGlobalConstantArray(CVA);
1150 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
1151 EmitGlobalConstantStruct(CVS);
1153 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
1154 EmitGlobalConstantFP(CFP);
1156 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1157 // Small integers are handled below; large integers are handled here.
1159 EmitGlobalConstantLargeInt(CI);
1162 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1163 EmitGlobalConstantVector(CP);
1167 printDataDirective(type);
1168 EmitConstantValueOnly(CV);
1169 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1171 CI->getValue().toStringUnsigned(S, 16);
1172 O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
1177 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1178 // Target doesn't support this yet!
1182 /// PrintSpecial - Print information related to the specified machine instr
1183 /// that is independent of the operand, and may be independent of the instr
1184 /// itself. This can be useful for portably encoding the comment character
1185 /// or other bits of target-specific knowledge into the asmstrings. The
1186 /// syntax used is ${:comment}. Targets can override this to add support
1187 /// for their own strange codes.
1188 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) {
1189 if (!strcmp(Code, "private")) {
1190 O << TAI->getPrivateGlobalPrefix();
1191 } else if (!strcmp(Code, "comment")) {
1192 O << TAI->getCommentString();
1193 } else if (!strcmp(Code, "uid")) {
1194 // Assign a unique ID to this machine instruction.
1195 static const MachineInstr *LastMI = 0;
1196 static const Function *F = 0;
1197 static unsigned Counter = 0U-1;
1199 // Comparing the address of MI isn't sufficient, because machineinstrs may
1200 // be allocated to the same address across functions.
1201 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1203 // If this is a new machine instruction, bump the counter.
1204 if (LastMI != MI || F != ThisF) {
1211 cerr << "Unknown special formatter '" << Code
1212 << "' for machine instr: " << *MI;
1218 /// printInlineAsm - This method formats and prints the specified machine
1219 /// instruction that is an inline asm.
1220 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1221 unsigned NumOperands = MI->getNumOperands();
1223 // Count the number of register definitions.
1224 unsigned NumDefs = 0;
1225 for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
1227 assert(NumDefs != NumOperands-1 && "No asm string?");
1229 assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
1231 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1232 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1234 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1235 // These are useful to see where empty asm's wound up.
1236 if (AsmStr[0] == 0) {
1237 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1241 O << TAI->getInlineAsmStart() << "\n\t";
1243 // The variant of the current asmprinter.
1244 int AsmPrinterVariant = TAI->getAssemblerDialect();
1246 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1247 const char *LastEmitted = AsmStr; // One past the last character emitted.
1249 while (*LastEmitted) {
1250 switch (*LastEmitted) {
1252 // Not a special case, emit the string section literally.
1253 const char *LiteralEnd = LastEmitted+1;
1254 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1255 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1257 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1258 O.write(LastEmitted, LiteralEnd-LastEmitted);
1259 LastEmitted = LiteralEnd;
1263 ++LastEmitted; // Consume newline character.
1264 O << '\n'; // Indent code with newline.
1267 ++LastEmitted; // Consume '$' character.
1271 switch (*LastEmitted) {
1272 default: Done = false; break;
1273 case '$': // $$ -> $
1274 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1276 ++LastEmitted; // Consume second '$' character.
1278 case '(': // $( -> same as GCC's { character.
1279 ++LastEmitted; // Consume '(' character.
1280 if (CurVariant != -1) {
1281 cerr << "Nested variants found in inline asm string: '"
1285 CurVariant = 0; // We're in the first variant now.
1288 ++LastEmitted; // consume '|' character.
1289 if (CurVariant == -1)
1290 O << '|'; // this is gcc's behavior for | outside a variant
1292 ++CurVariant; // We're in the next variant.
1294 case ')': // $) -> same as GCC's } char.
1295 ++LastEmitted; // consume ')' character.
1296 if (CurVariant == -1)
1297 O << '}'; // this is gcc's behavior for } outside a variant
1304 bool HasCurlyBraces = false;
1305 if (*LastEmitted == '{') { // ${variable}
1306 ++LastEmitted; // Consume '{' character.
1307 HasCurlyBraces = true;
1310 const char *IDStart = LastEmitted;
1313 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1314 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1315 cerr << "Bad $ operand number in inline asm string: '"
1319 LastEmitted = IDEnd;
1321 char Modifier[2] = { 0, 0 };
1323 if (HasCurlyBraces) {
1324 // If we have curly braces, check for a modifier character. This
1325 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1326 if (*LastEmitted == ':') {
1327 ++LastEmitted; // Consume ':' character.
1328 if (*LastEmitted == 0) {
1329 cerr << "Bad ${:} expression in inline asm string: '"
1334 Modifier[0] = *LastEmitted;
1335 ++LastEmitted; // Consume modifier character.
1338 if (*LastEmitted != '}') {
1339 cerr << "Bad ${} expression in inline asm string: '"
1343 ++LastEmitted; // Consume '}' character.
1346 if ((unsigned)Val >= NumOperands-1) {
1347 cerr << "Invalid $ operand number in inline asm string: '"
1352 // Okay, we finally have a value number. Ask the target to print this
1354 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1359 // Scan to find the machine operand number for the operand.
1360 for (; Val; --Val) {
1361 if (OpNo >= MI->getNumOperands()) break;
1362 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1363 OpNo += (OpFlags >> 3) + 1;
1366 if (OpNo >= MI->getNumOperands()) {
1369 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1370 ++OpNo; // Skip over the ID number.
1372 if (Modifier[0]=='l') // labels are target independent
1373 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1374 false, false, false);
1376 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1377 if ((OpFlags & 7) == 4) {
1378 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1379 Modifier[0] ? Modifier : 0);
1381 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1382 Modifier[0] ? Modifier : 0);
1387 cerr << "Invalid operand found in inline asm: '"
1397 O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1400 /// printImplicitDef - This method prints the specified machine instruction
1401 /// that is an implicit def.
1402 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1403 O << '\t' << TAI->getCommentString() << " implicit-def: "
1404 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1407 /// printLabel - This method prints a local label used by debug and
1408 /// exception handling tables.
1409 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1410 printLabel(MI->getOperand(0).getImm());
1413 void AsmPrinter::printLabel(unsigned Id) const {
1414 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1417 /// printDeclare - This method prints a local variable declaration used by
1419 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1420 /// entry into dwarf table.
1421 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1422 int FI = MI->getOperand(0).getIndex();
1423 GlobalValue *GV = MI->getOperand(1).getGlobal();
1424 MMI->RecordVariable(GV, FI);
1427 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1428 /// instruction, using the specified assembler variant. Targets should
1429 /// overried this to format as appropriate.
1430 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1431 unsigned AsmVariant, const char *ExtraCode) {
1432 // Target doesn't support this yet!
1436 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1437 unsigned AsmVariant,
1438 const char *ExtraCode) {
1439 // Target doesn't support this yet!
1443 /// printBasicBlockLabel - This method prints the label for the specified
1444 /// MachineBasicBlock
1445 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1448 bool printComment) const {
1450 unsigned Align = MBB->getAlignment();
1452 EmitAlignment(Log2_32(Align));
1455 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1456 << MBB->getNumber();
1459 if (printComment && MBB->getBasicBlock())
1460 O << '\t' << TAI->getCommentString() << ' '
1461 << MBB->getBasicBlock()->getNameStart();
1464 /// printPICJumpTableSetLabel - This method prints a set label for the
1465 /// specified MachineBasicBlock for a jumptable entry.
1466 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1467 const MachineBasicBlock *MBB) const {
1468 if (!TAI->getSetDirective())
1471 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1472 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1473 printBasicBlockLabel(MBB, false, false, false);
1474 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1475 << '_' << uid << '\n';
1478 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1479 const MachineBasicBlock *MBB) const {
1480 if (!TAI->getSetDirective())
1483 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1484 << getFunctionNumber() << '_' << uid << '_' << uid2
1485 << "_set_" << MBB->getNumber() << ',';
1486 printBasicBlockLabel(MBB, false, false, false);
1487 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1488 << '_' << uid << '_' << uid2 << '\n';
1491 /// printDataDirective - This method prints the asm directive for the
1493 void AsmPrinter::printDataDirective(const Type *type) {
1494 const TargetData *TD = TM.getTargetData();
1495 switch (type->getTypeID()) {
1496 case Type::IntegerTyID: {
1497 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1499 O << TAI->getData8bitsDirective();
1500 else if (BitWidth <= 16)
1501 O << TAI->getData16bitsDirective();
1502 else if (BitWidth <= 32)
1503 O << TAI->getData32bitsDirective();
1504 else if (BitWidth <= 64) {
1505 assert(TAI->getData64bitsDirective() &&
1506 "Target cannot handle 64-bit constant exprs!");
1507 O << TAI->getData64bitsDirective();
1509 assert(0 && "Target cannot handle given data directive width!");
1513 case Type::PointerTyID:
1514 if (TD->getPointerSize() == 8) {
1515 assert(TAI->getData64bitsDirective() &&
1516 "Target cannot handle 64-bit pointer exprs!");
1517 O << TAI->getData64bitsDirective();
1519 O << TAI->getData32bitsDirective();
1522 case Type::FloatTyID: case Type::DoubleTyID:
1523 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1524 assert (0 && "Should have already output floating point constant.");
1526 assert (0 && "Can't handle printing this type of thing");
1531 void AsmPrinter::printSuffixedName(const char *Name, const char *Suffix,
1532 const char *Prefix) {
1535 O << TAI->getPrivateGlobalPrefix();
1536 if (Prefix) O << Prefix;
1548 void AsmPrinter::printSuffixedName(const std::string &Name, const char* Suffix) {
1549 printSuffixedName(Name.c_str(), Suffix);
1552 void AsmPrinter::printVisibility(const std::string& Name,
1553 unsigned Visibility) const {
1554 if (Visibility == GlobalValue::HiddenVisibility) {
1555 if (const char *Directive = TAI->getHiddenDirective())
1556 O << Directive << Name << '\n';
1557 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1558 if (const char *Directive = TAI->getProtectedDirective())
1559 O << Directive << Name << '\n';
1563 void AsmPrinter::printOffset(int64_t Offset) const {
1566 else if (Offset < 0)
1570 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
1571 if (!S->usesMetadata())
1574 gcp_iterator GCPI = GCMetadataPrinters.find(S);
1575 if (GCPI != GCMetadataPrinters.end())
1576 return GCPI->second;
1578 const char *Name = S->getName().c_str();
1580 for (GCMetadataPrinterRegistry::iterator
1581 I = GCMetadataPrinterRegistry::begin(),
1582 E = GCMetadataPrinterRegistry::end(); I != E; ++I)
1583 if (strcmp(Name, I->getName()) == 0) {
1584 GCMetadataPrinter *GMP = I->instantiate();
1586 GCMetadataPrinters.insert(std::make_pair(S, GMP));
1590 cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";