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/MathExtras.h"
25 #include "llvm/Support/Streams.h"
26 #include "llvm/Target/TargetAsmInfo.h"
27 #include "llvm/Target/TargetData.h"
28 #include "llvm/Target/TargetLowering.h"
29 #include "llvm/Target/TargetMachine.h"
30 #include "llvm/Target/TargetOptions.h"
31 #include "llvm/Target/TargetRegisterInfo.h"
32 #include "llvm/ADT/SmallPtrSet.h"
33 #include "llvm/ADT/SmallString.h"
37 char AsmPrinter::ID = 0;
38 AsmPrinter::AsmPrinter(std::ostream &o, TargetMachine &tm,
39 const TargetAsmInfo *T)
40 : MachineFunctionPass((intptr_t)&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 std::string AsmPrinter::getSectionForFunction(const Function &F) const {
52 return TAI->getTextSection();
56 /// SwitchToTextSection - Switch to the specified text section of the executable
57 /// if we are not already in it!
59 void AsmPrinter::SwitchToTextSection(const char *NewSection,
60 const GlobalValue *GV) {
62 if (GV && GV->hasSection())
63 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
67 // If we're already in this section, we're done.
68 if (CurrentSection == NS) return;
70 // Close the current section, if applicable.
71 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
72 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
76 if (!CurrentSection.empty())
77 O << CurrentSection << TAI->getTextSectionStartSuffix() << '\n';
79 IsInTextSection = true;
82 /// SwitchToDataSection - Switch to the specified data section of the executable
83 /// if we are not already in it!
85 void AsmPrinter::SwitchToDataSection(const char *NewSection,
86 const GlobalValue *GV) {
88 if (GV && GV->hasSection())
89 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
93 // If we're already in this section, we're done.
94 if (CurrentSection == NS) return;
96 // Close the current section, if applicable.
97 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
98 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
102 if (!CurrentSection.empty())
103 O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
105 IsInTextSection = false;
109 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
110 MachineFunctionPass::getAnalysisUsage(AU);
111 AU.addRequired<GCModuleInfo>();
114 bool AsmPrinter::doInitialization(Module &M) {
115 Mang = new Mangler(M, TAI->getGlobalPrefix());
117 GCModuleInfo *MI = getAnalysisToUpdate<GCModuleInfo>();
118 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
119 for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
120 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
121 MP->beginAssembly(O, *this, *TAI);
123 if (!M.getModuleInlineAsm().empty())
124 O << TAI->getCommentString() << " Start of file scope inline assembly\n"
125 << M.getModuleInlineAsm()
126 << '\n' << TAI->getCommentString()
127 << " End of file scope inline assembly\n";
129 SwitchToDataSection(""); // Reset back to no section.
131 MMI = getAnalysisToUpdate<MachineModuleInfo>();
132 if (MMI) MMI->AnalyzeModule(M);
137 bool AsmPrinter::doFinalization(Module &M) {
138 if (TAI->getWeakRefDirective()) {
139 if (!ExtWeakSymbols.empty())
140 SwitchToDataSection("");
142 for (std::set<const GlobalValue*>::iterator i = ExtWeakSymbols.begin(),
143 e = ExtWeakSymbols.end(); i != e; ++i) {
144 const GlobalValue *GV = *i;
145 std::string Name = Mang->getValueName(GV);
146 O << TAI->getWeakRefDirective() << Name << '\n';
150 if (TAI->getSetDirective()) {
151 if (!M.alias_empty())
152 SwitchToTextSection(TAI->getTextSection());
155 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
157 std::string Name = Mang->getValueName(I);
160 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
161 Target = Mang->getValueName(GV);
163 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
164 O << "\t.globl\t" << Name << '\n';
165 else if (I->hasWeakLinkage())
166 O << TAI->getWeakRefDirective() << Name << '\n';
167 else if (!I->hasInternalLinkage())
168 assert(0 && "Invalid alias linkage");
170 if (I->hasHiddenVisibility()) {
171 if (const char *Directive = TAI->getHiddenDirective())
172 O << Directive << Name << '\n';
173 } else if (I->hasProtectedVisibility()) {
174 if (const char *Directive = TAI->getProtectedDirective())
175 O << Directive << Name << '\n';
178 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
180 // If the aliasee has external weak linkage it can be referenced only by
181 // alias itself. In this case it can be not in ExtWeakSymbols list. Emit
182 // weak reference in such case.
183 if (GV->hasExternalWeakLinkage()) {
184 if (TAI->getWeakRefDirective())
185 O << TAI->getWeakRefDirective() << Target << '\n';
187 O << "\t.globl\t" << Target << '\n';
192 GCModuleInfo *MI = getAnalysisToUpdate<GCModuleInfo>();
193 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
194 for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
195 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
196 MP->finishAssembly(O, *this, *TAI);
198 // If we don't have any trampolines, then we don't require stack memory
199 // to be executable. Some targets have a directive to declare this.
200 Function* InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
201 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
202 if (TAI->getNonexecutableStackDirective())
203 O << TAI->getNonexecutableStackDirective() << '\n';
205 delete Mang; Mang = 0;
209 std::string AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) {
210 assert(MF && "No machine function?");
211 std::string Name = MF->getFunction()->getName();
213 Name = Mang->getValueName(MF->getFunction());
214 return Mang->makeNameProper(Name + ".eh", TAI->getGlobalPrefix());
217 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
218 // What's my mangled name?
219 CurrentFnName = Mang->getValueName(MF.getFunction());
220 IncrementFunctionNumber();
223 /// EmitConstantPool - Print to the current output stream assembly
224 /// representations of the constants in the constant pool MCP. This is
225 /// used to print out constants which have been "spilled to memory" by
226 /// the code generator.
228 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
229 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
230 if (CP.empty()) return;
232 // Some targets require 4-, 8-, and 16- byte constant literals to be placed
233 // in special sections.
234 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > FourByteCPs;
235 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > EightByteCPs;
236 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > SixteenByteCPs;
237 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > OtherCPs;
238 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > TargetCPs;
239 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
240 MachineConstantPoolEntry CPE = CP[i];
241 const Type *Ty = CPE.getType();
242 if (TAI->getFourByteConstantSection() &&
243 TM.getTargetData()->getABITypeSize(Ty) == 4)
244 FourByteCPs.push_back(std::make_pair(CPE, i));
245 else if (TAI->getEightByteConstantSection() &&
246 TM.getTargetData()->getABITypeSize(Ty) == 8)
247 EightByteCPs.push_back(std::make_pair(CPE, i));
248 else if (TAI->getSixteenByteConstantSection() &&
249 TM.getTargetData()->getABITypeSize(Ty) == 16)
250 SixteenByteCPs.push_back(std::make_pair(CPE, i));
252 OtherCPs.push_back(std::make_pair(CPE, i));
255 unsigned Alignment = MCP->getConstantPoolAlignment();
256 EmitConstantPool(Alignment, TAI->getFourByteConstantSection(), FourByteCPs);
257 EmitConstantPool(Alignment, TAI->getEightByteConstantSection(), EightByteCPs);
258 EmitConstantPool(Alignment, TAI->getSixteenByteConstantSection(),
260 EmitConstantPool(Alignment, TAI->getConstantPoolSection(), OtherCPs);
263 void AsmPrinter::EmitConstantPool(unsigned Alignment, const char *Section,
264 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > &CP) {
265 if (CP.empty()) return;
267 SwitchToDataSection(Section);
268 EmitAlignment(Alignment);
269 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
270 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
271 << CP[i].second << ":\t\t\t\t\t" << TAI->getCommentString() << ' ';
272 WriteTypeSymbolic(O, CP[i].first.getType(), 0) << '\n';
273 if (CP[i].first.isMachineConstantPoolEntry())
274 EmitMachineConstantPoolValue(CP[i].first.Val.MachineCPVal);
276 EmitGlobalConstant(CP[i].first.Val.ConstVal);
278 const Type *Ty = CP[i].first.getType();
280 TM.getTargetData()->getABITypeSize(Ty);
281 unsigned ValEnd = CP[i].first.getOffset() + EntSize;
282 // Emit inter-object padding for alignment.
283 EmitZeros(CP[i+1].first.getOffset()-ValEnd);
288 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
289 /// by the current function to the current output stream.
291 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
292 MachineFunction &MF) {
293 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
294 if (JT.empty()) return;
296 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
298 // Pick the directive to use to print the jump table entries, and switch to
299 // the appropriate section.
300 TargetLowering *LoweringInfo = TM.getTargetLowering();
302 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
303 const Function *F = MF.getFunction();
304 unsigned SectionFlags = TAI->SectionFlagsForGlobal(F);
305 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
306 !JumpTableDataSection ||
307 SectionFlags & SectionFlags::Linkonce) {
308 // In PIC mode, we need to emit the jump table to the same section as the
309 // function body itself, otherwise the label differences won't make sense.
310 // We should also do if the section name is NULL or function is declared in
311 // discardable section.
312 SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
314 SwitchToDataSection(JumpTableDataSection);
317 EmitAlignment(Log2_32(MJTI->getAlignment()));
319 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
320 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
322 // If this jump table was deleted, ignore it.
323 if (JTBBs.empty()) continue;
325 // For PIC codegen, if possible we want to use the SetDirective to reduce
326 // the number of relocations the assembler will generate for the jump table.
327 // Set directives are all printed before the jump table itself.
328 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
329 if (TAI->getSetDirective() && IsPic)
330 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
331 if (EmittedSets.insert(JTBBs[ii]))
332 printPICJumpTableSetLabel(i, JTBBs[ii]);
334 // On some targets (e.g. darwin) we want to emit two consequtive labels
335 // before each jump table. The first label is never referenced, but tells
336 // the assembler and linker the extents of the jump table object. The
337 // second label is actually referenced by the code.
338 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
339 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
341 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
342 << '_' << i << ":\n";
344 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
345 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
351 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
352 const MachineBasicBlock *MBB,
353 unsigned uid) const {
354 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
356 // Use JumpTableDirective otherwise honor the entry size from the jump table
358 const char *JTEntryDirective = TAI->getJumpTableDirective();
359 bool HadJTEntryDirective = JTEntryDirective != NULL;
360 if (!HadJTEntryDirective) {
361 JTEntryDirective = MJTI->getEntrySize() == 4 ?
362 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
365 O << JTEntryDirective << ' ';
367 // If we have emitted set directives for the jump table entries, print
368 // them rather than the entries themselves. If we're emitting PIC, then
369 // emit the table entries as differences between two text section labels.
370 // If we're emitting non-PIC code, then emit the entries as direct
371 // references to the target basic blocks.
373 if (TAI->getSetDirective()) {
374 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
375 << '_' << uid << "_set_" << MBB->getNumber();
377 printBasicBlockLabel(MBB, false, false, false);
378 // If the arch uses custom Jump Table directives, don't calc relative to
380 if (!HadJTEntryDirective)
381 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
382 << getFunctionNumber() << '_' << uid;
385 printBasicBlockLabel(MBB, false, false, false);
390 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
391 /// special global used by LLVM. If so, emit it and return true, otherwise
392 /// do nothing and return false.
393 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
394 if (GV->getName() == "llvm.used") {
395 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
396 EmitLLVMUsedList(GV->getInitializer());
400 // Ignore debug and non-emitted data.
401 if (GV->getSection() == "llvm.metadata") return true;
403 if (!GV->hasAppendingLinkage()) return false;
405 assert(GV->hasInitializer() && "Not a special LLVM global!");
407 const TargetData *TD = TM.getTargetData();
408 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
409 if (GV->getName() == "llvm.global_ctors" && GV->use_empty()) {
410 SwitchToDataSection(TAI->getStaticCtorsSection());
411 EmitAlignment(Align, 0);
412 EmitXXStructorList(GV->getInitializer());
416 if (GV->getName() == "llvm.global_dtors" && GV->use_empty()) {
417 SwitchToDataSection(TAI->getStaticDtorsSection());
418 EmitAlignment(Align, 0);
419 EmitXXStructorList(GV->getInitializer());
426 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
427 /// global in the specified llvm.used list as being used with this directive.
428 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
429 const char *Directive = TAI->getUsedDirective();
431 // Should be an array of 'sbyte*'.
432 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
433 if (InitList == 0) return;
435 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
437 EmitConstantValueOnly(InitList->getOperand(i));
442 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
443 /// function pointers, ignoring the init priority.
444 void AsmPrinter::EmitXXStructorList(Constant *List) {
445 // Should be an array of '{ int, void ()* }' structs. The first value is the
446 // init priority, which we ignore.
447 if (!isa<ConstantArray>(List)) return;
448 ConstantArray *InitList = cast<ConstantArray>(List);
449 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
450 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
451 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
453 if (CS->getOperand(1)->isNullValue())
454 return; // Found a null terminator, exit printing.
455 // Emit the function pointer.
456 EmitGlobalConstant(CS->getOperand(1));
460 /// getGlobalLinkName - Returns the asm/link name of of the specified
461 /// global variable. Should be overridden by each target asm printer to
462 /// generate the appropriate value.
463 const std::string AsmPrinter::getGlobalLinkName(const GlobalVariable *GV) const{
464 std::string LinkName;
466 if (isa<Function>(GV)) {
467 LinkName += TAI->getFunctionAddrPrefix();
468 LinkName += Mang->getValueName(GV);
469 LinkName += TAI->getFunctionAddrSuffix();
471 LinkName += TAI->getGlobalVarAddrPrefix();
472 LinkName += Mang->getValueName(GV);
473 LinkName += TAI->getGlobalVarAddrSuffix();
479 /// EmitExternalGlobal - Emit the external reference to a global variable.
480 /// Should be overridden if an indirect reference should be used.
481 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
482 O << getGlobalLinkName(GV);
487 //===----------------------------------------------------------------------===//
488 /// LEB 128 number encoding.
490 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
491 /// representing an unsigned leb128 value.
492 void AsmPrinter::PrintULEB128(unsigned Value) const {
494 unsigned Byte = Value & 0x7f;
496 if (Value) Byte |= 0x80;
497 O << "0x" << std::hex << Byte << std::dec;
498 if (Value) O << ", ";
502 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
503 /// representing a signed leb128 value.
504 void AsmPrinter::PrintSLEB128(int Value) const {
505 int Sign = Value >> (8 * sizeof(Value) - 1);
509 unsigned Byte = Value & 0x7f;
511 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
512 if (IsMore) Byte |= 0x80;
513 O << "0x" << std::hex << Byte << std::dec;
514 if (IsMore) O << ", ";
518 //===--------------------------------------------------------------------===//
519 // Emission and print routines
522 /// PrintHex - Print a value as a hexidecimal value.
524 void AsmPrinter::PrintHex(int Value) const {
525 O << "0x" << std::hex << Value << std::dec;
528 /// EOL - Print a newline character to asm stream. If a comment is present
529 /// then it will be printed first. Comments should not contain '\n'.
530 void AsmPrinter::EOL() const {
534 void AsmPrinter::EOL(const std::string &Comment) const {
535 if (VerboseAsm && !Comment.empty()) {
537 << TAI->getCommentString()
544 void AsmPrinter::EOL(const char* Comment) const {
545 if (VerboseAsm && *Comment) {
547 << TAI->getCommentString()
554 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
555 /// unsigned leb128 value.
556 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
557 if (TAI->hasLEB128()) {
561 O << TAI->getData8bitsDirective();
566 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
567 /// signed leb128 value.
568 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
569 if (TAI->hasLEB128()) {
573 O << TAI->getData8bitsDirective();
578 /// EmitInt8 - Emit a byte directive and value.
580 void AsmPrinter::EmitInt8(int Value) const {
581 O << TAI->getData8bitsDirective();
582 PrintHex(Value & 0xFF);
585 /// EmitInt16 - Emit a short directive and value.
587 void AsmPrinter::EmitInt16(int Value) const {
588 O << TAI->getData16bitsDirective();
589 PrintHex(Value & 0xFFFF);
592 /// EmitInt32 - Emit a long directive and value.
594 void AsmPrinter::EmitInt32(int Value) const {
595 O << TAI->getData32bitsDirective();
599 /// EmitInt64 - Emit a long long directive and value.
601 void AsmPrinter::EmitInt64(uint64_t Value) const {
602 if (TAI->getData64bitsDirective()) {
603 O << TAI->getData64bitsDirective();
606 if (TM.getTargetData()->isBigEndian()) {
607 EmitInt32(unsigned(Value >> 32)); O << '\n';
608 EmitInt32(unsigned(Value));
610 EmitInt32(unsigned(Value)); O << '\n';
611 EmitInt32(unsigned(Value >> 32));
616 /// toOctal - Convert the low order bits of X into an octal digit.
618 static inline char toOctal(int X) {
622 /// printStringChar - Print a char, escaped if necessary.
624 static void printStringChar(std::ostream &O, unsigned char C) {
627 } else if (C == '\\') {
629 } else if (isprint(C)) {
633 case '\b': O << "\\b"; break;
634 case '\f': O << "\\f"; break;
635 case '\n': O << "\\n"; break;
636 case '\r': O << "\\r"; break;
637 case '\t': O << "\\t"; break;
640 O << toOctal(C >> 6);
641 O << toOctal(C >> 3);
642 O << toOctal(C >> 0);
648 /// EmitString - Emit a string with quotes and a null terminator.
649 /// Special characters are emitted properly.
650 /// \literal (Eg. '\t') \endliteral
651 void AsmPrinter::EmitString(const std::string &String) const {
652 const char* AscizDirective = TAI->getAscizDirective();
656 O << TAI->getAsciiDirective();
658 for (unsigned i = 0, N = String.size(); i < N; ++i) {
659 unsigned char C = String[i];
660 printStringChar(O, C);
669 /// EmitFile - Emit a .file directive.
670 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
671 O << "\t.file\t" << Number << " \"";
672 for (unsigned i = 0, N = Name.size(); i < N; ++i) {
673 unsigned char C = Name[i];
674 printStringChar(O, C);
680 //===----------------------------------------------------------------------===//
682 // EmitAlignment - Emit an alignment directive to the specified power of
683 // two boundary. For example, if you pass in 3 here, you will get an 8
684 // byte alignment. If a global value is specified, and if that global has
685 // an explicit alignment requested, it will unconditionally override the
686 // alignment request. However, if ForcedAlignBits is specified, this value
687 // has final say: the ultimate alignment will be the max of ForcedAlignBits
688 // and the alignment computed with NumBits and the global.
692 // if (GV && GV->hasalignment) Align = GV->getalignment();
693 // Align = std::max(Align, ForcedAlignBits);
695 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
696 unsigned ForcedAlignBits,
697 bool UseFillExpr) const {
698 if (GV && GV->getAlignment())
699 NumBits = Log2_32(GV->getAlignment());
700 NumBits = std::max(NumBits, ForcedAlignBits);
702 if (NumBits == 0) return; // No need to emit alignment.
703 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
704 O << TAI->getAlignDirective() << NumBits;
706 unsigned FillValue = TAI->getTextAlignFillValue();
707 UseFillExpr &= IsInTextSection && FillValue;
708 if (UseFillExpr) O << ",0x" << std::hex << FillValue << std::dec;
713 /// EmitZeros - Emit a block of zeros.
715 void AsmPrinter::EmitZeros(uint64_t NumZeros) const {
717 if (TAI->getZeroDirective()) {
718 O << TAI->getZeroDirective() << NumZeros;
719 if (TAI->getZeroDirectiveSuffix())
720 O << TAI->getZeroDirectiveSuffix();
723 for (; NumZeros; --NumZeros)
724 O << TAI->getData8bitsDirective() << "0\n";
729 // Print out the specified constant, without a storage class. Only the
730 // constants valid in constant expressions can occur here.
731 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
732 if (CV->isNullValue() || isa<UndefValue>(CV))
734 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
735 O << CI->getZExtValue();
736 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
737 // This is a constant address for a global variable or function. Use the
738 // name of the variable or function as the address value, possibly
739 // decorating it with GlobalVarAddrPrefix/Suffix or
740 // FunctionAddrPrefix/Suffix (these all default to "" )
741 if (isa<Function>(GV)) {
742 O << TAI->getFunctionAddrPrefix()
743 << Mang->getValueName(GV)
744 << TAI->getFunctionAddrSuffix();
746 O << TAI->getGlobalVarAddrPrefix()
747 << Mang->getValueName(GV)
748 << TAI->getGlobalVarAddrSuffix();
750 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
751 const TargetData *TD = TM.getTargetData();
752 unsigned Opcode = CE->getOpcode();
754 case Instruction::GetElementPtr: {
755 // generate a symbolic expression for the byte address
756 const Constant *ptrVal = CE->getOperand(0);
757 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
758 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
762 EmitConstantValueOnly(ptrVal);
764 O << ") + " << Offset;
766 O << ") - " << -Offset;
768 EmitConstantValueOnly(ptrVal);
772 case Instruction::Trunc:
773 case Instruction::ZExt:
774 case Instruction::SExt:
775 case Instruction::FPTrunc:
776 case Instruction::FPExt:
777 case Instruction::UIToFP:
778 case Instruction::SIToFP:
779 case Instruction::FPToUI:
780 case Instruction::FPToSI:
781 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
783 case Instruction::BitCast:
784 return EmitConstantValueOnly(CE->getOperand(0));
786 case Instruction::IntToPtr: {
787 // Handle casts to pointers by changing them into casts to the appropriate
788 // integer type. This promotes constant folding and simplifies this code.
789 Constant *Op = CE->getOperand(0);
790 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
791 return EmitConstantValueOnly(Op);
795 case Instruction::PtrToInt: {
796 // Support only foldable casts to/from pointers that can be eliminated by
797 // changing the pointer to the appropriately sized integer type.
798 Constant *Op = CE->getOperand(0);
799 const Type *Ty = CE->getType();
801 // We can emit the pointer value into this slot if the slot is an
802 // integer slot greater or equal to the size of the pointer.
803 if (TD->getABITypeSize(Ty) >= TD->getABITypeSize(Op->getType()))
804 return EmitConstantValueOnly(Op);
807 EmitConstantValueOnly(Op);
808 APInt ptrMask = APInt::getAllOnesValue(TD->getABITypeSizeInBits(Ty));
811 ptrMask.toStringUnsigned(S);
812 O << ") & " << S.c_str() << ')';
815 case Instruction::Add:
816 case Instruction::Sub:
817 case Instruction::And:
818 case Instruction::Or:
819 case Instruction::Xor:
821 EmitConstantValueOnly(CE->getOperand(0));
824 case Instruction::Add:
827 case Instruction::Sub:
830 case Instruction::And:
833 case Instruction::Or:
836 case Instruction::Xor:
843 EmitConstantValueOnly(CE->getOperand(1));
847 assert(0 && "Unsupported operator!");
850 assert(0 && "Unknown constant value!");
854 /// printAsCString - Print the specified array as a C compatible string, only if
855 /// the predicate isString is true.
857 static void printAsCString(std::ostream &O, const ConstantArray *CVA,
859 assert(CVA->isString() && "Array is not string compatible!");
862 for (unsigned i = 0; i != LastElt; ++i) {
864 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
865 printStringChar(O, C);
870 /// EmitString - Emit a zero-byte-terminated string constant.
872 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
873 unsigned NumElts = CVA->getNumOperands();
874 if (TAI->getAscizDirective() && NumElts &&
875 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
876 O << TAI->getAscizDirective();
877 printAsCString(O, CVA, NumElts-1);
879 O << TAI->getAsciiDirective();
880 printAsCString(O, CVA, NumElts);
885 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
886 void AsmPrinter::EmitGlobalConstant(const Constant *CV) {
887 const TargetData *TD = TM.getTargetData();
888 unsigned Size = TD->getABITypeSize(CV->getType());
890 if (CV->isNullValue() || isa<UndefValue>(CV)) {
893 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
894 if (CVA->isString()) {
896 } else { // Not a string. Print the values in successive locations
897 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
898 EmitGlobalConstant(CVA->getOperand(i));
901 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
902 // Print the fields in successive locations. Pad to align if needed!
903 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
904 uint64_t sizeSoFar = 0;
905 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
906 const Constant* field = CVS->getOperand(i);
908 // Check if padding is needed and insert one or more 0s.
909 uint64_t fieldSize = TD->getABITypeSize(field->getType());
910 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
911 - cvsLayout->getElementOffset(i)) - fieldSize;
912 sizeSoFar += fieldSize + padSize;
914 // Now print the actual field value.
915 EmitGlobalConstant(field);
917 // Insert padding - this may include padding to increase the size of the
918 // current field up to the ABI size (if the struct is not packed) as well
919 // as padding to ensure that the next field starts at the right offset.
922 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
923 "Layout of constant struct may be incorrect!");
925 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
926 // FP Constants are printed as integer constants to avoid losing
928 if (CFP->getType() == Type::DoubleTy) {
929 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
930 uint64_t i = CFP->getValueAPF().convertToAPInt().getZExtValue();
931 if (TAI->getData64bitsDirective())
932 O << TAI->getData64bitsDirective() << i << '\t'
933 << TAI->getCommentString() << " double value: " << Val << '\n';
934 else if (TD->isBigEndian()) {
935 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
936 << '\t' << TAI->getCommentString()
937 << " double most significant word " << Val << '\n';
938 O << TAI->getData32bitsDirective() << unsigned(i)
939 << '\t' << TAI->getCommentString()
940 << " double least significant word " << Val << '\n';
942 O << TAI->getData32bitsDirective() << unsigned(i)
943 << '\t' << TAI->getCommentString()
944 << " double least significant word " << Val << '\n';
945 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
946 << '\t' << TAI->getCommentString()
947 << " double most significant word " << Val << '\n';
950 } else if (CFP->getType() == Type::FloatTy) {
951 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
952 O << TAI->getData32bitsDirective()
953 << CFP->getValueAPF().convertToAPInt().getZExtValue()
954 << '\t' << TAI->getCommentString() << " float " << Val << '\n';
956 } else if (CFP->getType() == Type::X86_FP80Ty) {
957 // all long double variants are printed as hex
958 // api needed to prevent premature destruction
959 APInt api = CFP->getValueAPF().convertToAPInt();
960 const uint64_t *p = api.getRawData();
961 APFloat DoubleVal = CFP->getValueAPF();
962 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven);
963 if (TD->isBigEndian()) {
964 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
965 << '\t' << TAI->getCommentString()
966 << " long double most significant halfword of ~"
967 << DoubleVal.convertToDouble() << '\n';
968 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
969 << '\t' << TAI->getCommentString()
970 << " long double next halfword\n";
971 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
972 << '\t' << TAI->getCommentString()
973 << " long double next halfword\n";
974 O << TAI->getData16bitsDirective() << uint16_t(p[0])
975 << '\t' << TAI->getCommentString()
976 << " long double next halfword\n";
977 O << TAI->getData16bitsDirective() << uint16_t(p[1])
978 << '\t' << TAI->getCommentString()
979 << " long double least significant halfword\n";
981 O << TAI->getData16bitsDirective() << uint16_t(p[1])
982 << '\t' << TAI->getCommentString()
983 << " long double least significant halfword of ~"
984 << DoubleVal.convertToDouble() << '\n';
985 O << TAI->getData16bitsDirective() << uint16_t(p[0])
986 << '\t' << TAI->getCommentString()
987 << " long double next halfword\n";
988 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
989 << '\t' << TAI->getCommentString()
990 << " long double next halfword\n";
991 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
992 << '\t' << TAI->getCommentString()
993 << " long double next halfword\n";
994 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
995 << '\t' << TAI->getCommentString()
996 << " long double most significant halfword\n";
998 EmitZeros(Size - TD->getTypeStoreSize(Type::X86_FP80Ty));
1000 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1001 // all long double variants are printed as hex
1002 // api needed to prevent premature destruction
1003 APInt api = CFP->getValueAPF().convertToAPInt();
1004 const uint64_t *p = api.getRawData();
1005 if (TD->isBigEndian()) {
1006 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1007 << '\t' << TAI->getCommentString()
1008 << " long double most significant word\n";
1009 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1010 << '\t' << TAI->getCommentString()
1011 << " long double next word\n";
1012 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1013 << '\t' << TAI->getCommentString()
1014 << " long double next word\n";
1015 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1016 << '\t' << TAI->getCommentString()
1017 << " long double least significant word\n";
1019 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1020 << '\t' << TAI->getCommentString()
1021 << " long double least significant word\n";
1022 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1023 << '\t' << TAI->getCommentString()
1024 << " long double next word\n";
1025 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1026 << '\t' << TAI->getCommentString()
1027 << " long double next word\n";
1028 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1029 << '\t' << TAI->getCommentString()
1030 << " long double most significant word\n";
1033 } else assert(0 && "Floating point constant type not handled");
1034 } else if (CV->getType() == Type::Int64Ty) {
1035 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1036 uint64_t Val = CI->getZExtValue();
1038 if (TAI->getData64bitsDirective())
1039 O << TAI->getData64bitsDirective() << Val << '\n';
1040 else if (TD->isBigEndian()) {
1041 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1042 << '\t' << TAI->getCommentString()
1043 << " Double-word most significant word " << Val << '\n';
1044 O << TAI->getData32bitsDirective() << unsigned(Val)
1045 << '\t' << TAI->getCommentString()
1046 << " Double-word least significant word " << Val << '\n';
1048 O << TAI->getData32bitsDirective() << unsigned(Val)
1049 << '\t' << TAI->getCommentString()
1050 << " Double-word least significant word " << Val << '\n';
1051 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1052 << '\t' << TAI->getCommentString()
1053 << " Double-word most significant word " << Val << '\n';
1057 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1058 const VectorType *PTy = CP->getType();
1060 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
1061 EmitGlobalConstant(CP->getOperand(I));
1066 const Type *type = CV->getType();
1067 printDataDirective(type);
1068 EmitConstantValueOnly(CV);
1069 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1071 CI->getValue().toStringUnsigned(S, 16);
1072 O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
1077 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1078 // Target doesn't support this yet!
1082 /// PrintSpecial - Print information related to the specified machine instr
1083 /// that is independent of the operand, and may be independent of the instr
1084 /// itself. This can be useful for portably encoding the comment character
1085 /// or other bits of target-specific knowledge into the asmstrings. The
1086 /// syntax used is ${:comment}. Targets can override this to add support
1087 /// for their own strange codes.
1088 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) {
1089 if (!strcmp(Code, "private")) {
1090 O << TAI->getPrivateGlobalPrefix();
1091 } else if (!strcmp(Code, "comment")) {
1092 O << TAI->getCommentString();
1093 } else if (!strcmp(Code, "uid")) {
1094 // Assign a unique ID to this machine instruction.
1095 static const MachineInstr *LastMI = 0;
1096 static const Function *F = 0;
1097 static unsigned Counter = 0U-1;
1099 // Comparing the address of MI isn't sufficient, because machineinstrs may
1100 // be allocated to the same address across functions.
1101 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1103 // If this is a new machine instruction, bump the counter.
1104 if (LastMI != MI || F != ThisF) {
1111 cerr << "Unknown special formatter '" << Code
1112 << "' for machine instr: " << *MI;
1118 /// printInlineAsm - This method formats and prints the specified machine
1119 /// instruction that is an inline asm.
1120 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1121 unsigned NumOperands = MI->getNumOperands();
1123 // Count the number of register definitions.
1124 unsigned NumDefs = 0;
1125 for (; MI->getOperand(NumDefs).isRegister() && MI->getOperand(NumDefs).isDef();
1127 assert(NumDefs != NumOperands-1 && "No asm string?");
1129 assert(MI->getOperand(NumDefs).isExternalSymbol() && "No asm string?");
1131 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1132 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1134 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1135 // These are useful to see where empty asm's wound up.
1136 if (AsmStr[0] == 0) {
1137 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1141 O << TAI->getInlineAsmStart() << "\n\t";
1143 // The variant of the current asmprinter.
1144 int AsmPrinterVariant = TAI->getAssemblerDialect();
1146 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1147 const char *LastEmitted = AsmStr; // One past the last character emitted.
1149 while (*LastEmitted) {
1150 switch (*LastEmitted) {
1152 // Not a special case, emit the string section literally.
1153 const char *LiteralEnd = LastEmitted+1;
1154 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1155 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1157 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1158 O.write(LastEmitted, LiteralEnd-LastEmitted);
1159 LastEmitted = LiteralEnd;
1163 ++LastEmitted; // Consume newline character.
1164 O << '\n'; // Indent code with newline.
1167 ++LastEmitted; // Consume '$' character.
1171 switch (*LastEmitted) {
1172 default: Done = false; break;
1173 case '$': // $$ -> $
1174 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1176 ++LastEmitted; // Consume second '$' character.
1178 case '(': // $( -> same as GCC's { character.
1179 ++LastEmitted; // Consume '(' character.
1180 if (CurVariant != -1) {
1181 cerr << "Nested variants found in inline asm string: '"
1185 CurVariant = 0; // We're in the first variant now.
1188 ++LastEmitted; // consume '|' character.
1189 if (CurVariant == -1) {
1190 cerr << "Found '|' character outside of variant in inline asm "
1191 << "string: '" << AsmStr << "'\n";
1194 ++CurVariant; // We're in the next variant.
1196 case ')': // $) -> same as GCC's } char.
1197 ++LastEmitted; // consume ')' character.
1198 if (CurVariant == -1) {
1199 cerr << "Found '}' character outside of variant in inline asm "
1200 << "string: '" << AsmStr << "'\n";
1208 bool HasCurlyBraces = false;
1209 if (*LastEmitted == '{') { // ${variable}
1210 ++LastEmitted; // Consume '{' character.
1211 HasCurlyBraces = true;
1214 const char *IDStart = LastEmitted;
1217 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1218 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1219 cerr << "Bad $ operand number in inline asm string: '"
1223 LastEmitted = IDEnd;
1225 char Modifier[2] = { 0, 0 };
1227 if (HasCurlyBraces) {
1228 // If we have curly braces, check for a modifier character. This
1229 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1230 if (*LastEmitted == ':') {
1231 ++LastEmitted; // Consume ':' character.
1232 if (*LastEmitted == 0) {
1233 cerr << "Bad ${:} expression in inline asm string: '"
1238 Modifier[0] = *LastEmitted;
1239 ++LastEmitted; // Consume modifier character.
1242 if (*LastEmitted != '}') {
1243 cerr << "Bad ${} expression in inline asm string: '"
1247 ++LastEmitted; // Consume '}' character.
1250 if ((unsigned)Val >= NumOperands-1) {
1251 cerr << "Invalid $ operand number in inline asm string: '"
1256 // Okay, we finally have a value number. Ask the target to print this
1258 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1263 // Scan to find the machine operand number for the operand.
1264 for (; Val; --Val) {
1265 if (OpNo >= MI->getNumOperands()) break;
1266 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1267 OpNo += (OpFlags >> 3) + 1;
1270 if (OpNo >= MI->getNumOperands()) {
1273 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1274 ++OpNo; // Skip over the ID number.
1276 if (Modifier[0]=='l') // labels are target independent
1277 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1278 false, false, false);
1280 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1281 if ((OpFlags & 7) == 4 /*ADDR MODE*/) {
1282 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1283 Modifier[0] ? Modifier : 0);
1285 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1286 Modifier[0] ? Modifier : 0);
1291 cerr << "Invalid operand found in inline asm: '"
1301 O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1304 /// printImplicitDef - This method prints the specified machine instruction
1305 /// that is an implicit def.
1306 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1307 O << '\t' << TAI->getCommentString() << " implicit-def: "
1308 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1311 /// printLabel - This method prints a local label used by debug and
1312 /// exception handling tables.
1313 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1314 printLabel(MI->getOperand(0).getImm());
1317 void AsmPrinter::printLabel(unsigned Id) const {
1318 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1321 /// printDeclare - This method prints a local variable declaration used by
1323 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1324 /// entry into dwarf table.
1325 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1326 int FI = MI->getOperand(0).getIndex();
1327 GlobalValue *GV = MI->getOperand(1).getGlobal();
1328 MMI->RecordVariable(GV, FI);
1331 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1332 /// instruction, using the specified assembler variant. Targets should
1333 /// overried this to format as appropriate.
1334 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1335 unsigned AsmVariant, const char *ExtraCode) {
1336 // Target doesn't support this yet!
1340 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1341 unsigned AsmVariant,
1342 const char *ExtraCode) {
1343 // Target doesn't support this yet!
1347 /// printBasicBlockLabel - This method prints the label for the specified
1348 /// MachineBasicBlock
1349 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1352 bool printComment) const {
1354 unsigned Align = MBB->getAlignment();
1356 EmitAlignment(Log2_32(Align));
1359 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1360 << MBB->getNumber();
1363 if (printComment && MBB->getBasicBlock())
1364 O << '\t' << TAI->getCommentString() << ' '
1365 << MBB->getBasicBlock()->getNameStart();
1368 /// printPICJumpTableSetLabel - This method prints a set label for the
1369 /// specified MachineBasicBlock for a jumptable entry.
1370 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1371 const MachineBasicBlock *MBB) const {
1372 if (!TAI->getSetDirective())
1375 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1376 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1377 printBasicBlockLabel(MBB, false, false, false);
1378 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1379 << '_' << uid << '\n';
1382 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1383 const MachineBasicBlock *MBB) const {
1384 if (!TAI->getSetDirective())
1387 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1388 << getFunctionNumber() << '_' << uid << '_' << uid2
1389 << "_set_" << MBB->getNumber() << ',';
1390 printBasicBlockLabel(MBB, false, false, false);
1391 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1392 << '_' << uid << '_' << uid2 << '\n';
1395 /// printDataDirective - This method prints the asm directive for the
1397 void AsmPrinter::printDataDirective(const Type *type) {
1398 const TargetData *TD = TM.getTargetData();
1399 switch (type->getTypeID()) {
1400 case Type::IntegerTyID: {
1401 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1403 O << TAI->getData8bitsDirective();
1404 else if (BitWidth <= 16)
1405 O << TAI->getData16bitsDirective();
1406 else if (BitWidth <= 32)
1407 O << TAI->getData32bitsDirective();
1408 else if (BitWidth <= 64) {
1409 assert(TAI->getData64bitsDirective() &&
1410 "Target cannot handle 64-bit constant exprs!");
1411 O << TAI->getData64bitsDirective();
1415 case Type::PointerTyID:
1416 if (TD->getPointerSize() == 8) {
1417 assert(TAI->getData64bitsDirective() &&
1418 "Target cannot handle 64-bit pointer exprs!");
1419 O << TAI->getData64bitsDirective();
1421 O << TAI->getData32bitsDirective();
1424 case Type::FloatTyID: case Type::DoubleTyID:
1425 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1426 assert (0 && "Should have already output floating point constant.");
1428 assert (0 && "Can't handle printing this type of thing");
1433 void AsmPrinter::printSuffixedName(const char *Name, const char *Suffix,
1434 const char *Prefix) {
1437 O << TAI->getPrivateGlobalPrefix();
1438 if (Prefix) O << Prefix;
1450 void AsmPrinter::printSuffixedName(const std::string &Name, const char* Suffix) {
1451 printSuffixedName(Name.c_str(), Suffix);
1454 void AsmPrinter::printVisibility(const std::string& Name,
1455 unsigned Visibility) const {
1456 if (Visibility == GlobalValue::HiddenVisibility) {
1457 if (const char *Directive = TAI->getHiddenDirective())
1458 O << Directive << Name << '\n';
1459 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1460 if (const char *Directive = TAI->getProtectedDirective())
1461 O << Directive << Name << '\n';
1465 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
1466 if (!S->usesMetadata())
1469 gcp_iterator GCPI = GCMetadataPrinters.find(S);
1470 if (GCPI != GCMetadataPrinters.end())
1471 return GCPI->second;
1473 const char *Name = S->getName().c_str();
1475 for (GCMetadataPrinterRegistry::iterator
1476 I = GCMetadataPrinterRegistry::begin(),
1477 E = GCMetadataPrinterRegistry::end(); I != E; ++I)
1478 if (strcmp(Name, I->getName()) == 0) {
1479 GCMetadataPrinter *GMP = I->instantiate();
1481 GCMetadataPrinters.insert(std::make_pair(S, GMP));
1485 cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";