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/Collector.h"
20 #include "llvm/CodeGen/CollectorMetadata.h"
21 #include "llvm/CodeGen/MachineConstantPool.h"
22 #include "llvm/CodeGen/MachineJumpTableInfo.h"
23 #include "llvm/CodeGen/MachineModuleInfo.h"
24 #include "llvm/Support/Mangler.h"
25 #include "llvm/Support/MathExtras.h"
26 #include "llvm/Support/Streams.h"
27 #include "llvm/Target/TargetAsmInfo.h"
28 #include "llvm/Target/TargetData.h"
29 #include "llvm/Target/TargetLowering.h"
30 #include "llvm/Target/TargetMachine.h"
31 #include "llvm/Target/TargetOptions.h"
32 #include "llvm/Target/TargetRegisterInfo.h"
33 #include "llvm/ADT/SmallPtrSet.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 std::string AsmPrinter::getSectionForFunction(const Function &F) const {
46 return TAI->getTextSection();
50 /// SwitchToTextSection - Switch to the specified text section of the executable
51 /// if we are not already in it!
53 void AsmPrinter::SwitchToTextSection(const char *NewSection,
54 const GlobalValue *GV) {
56 if (GV && GV->hasSection())
57 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
61 // If we're already in this section, we're done.
62 if (CurrentSection == NS) return;
64 // Close the current section, if applicable.
65 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
66 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
70 if (!CurrentSection.empty())
71 O << CurrentSection << TAI->getTextSectionStartSuffix() << '\n';
73 IsInTextSection = true;
76 /// SwitchToDataSection - Switch to the specified data section of the executable
77 /// if we are not already in it!
79 void AsmPrinter::SwitchToDataSection(const char *NewSection,
80 const GlobalValue *GV) {
82 if (GV && GV->hasSection())
83 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
87 // If we're already in this section, we're done.
88 if (CurrentSection == NS) return;
90 // Close the current section, if applicable.
91 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
92 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
96 if (!CurrentSection.empty())
97 O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
99 IsInTextSection = false;
103 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
104 MachineFunctionPass::getAnalysisUsage(AU);
105 AU.addRequired<CollectorModuleMetadata>();
108 bool AsmPrinter::doInitialization(Module &M) {
109 Mang = new Mangler(M, TAI->getGlobalPrefix());
111 CollectorModuleMetadata *CMM = getAnalysisToUpdate<CollectorModuleMetadata>();
112 assert(CMM && "AsmPrinter didn't require CollectorModuleMetadata?");
113 for (CollectorModuleMetadata::iterator I = CMM->begin(),
114 E = CMM->end(); I != E; ++I)
115 (*I)->beginAssembly(O, *this, *TAI);
117 if (!M.getModuleInlineAsm().empty())
118 O << TAI->getCommentString() << " Start of file scope inline assembly\n"
119 << M.getModuleInlineAsm()
120 << '\n' << TAI->getCommentString()
121 << " End of file scope inline assembly\n";
123 SwitchToDataSection(""); // Reset back to no section.
125 MMI = getAnalysisToUpdate<MachineModuleInfo>();
126 if (MMI) MMI->AnalyzeModule(M);
131 bool AsmPrinter::doFinalization(Module &M) {
132 if (TAI->getWeakRefDirective()) {
133 if (!ExtWeakSymbols.empty())
134 SwitchToDataSection("");
136 for (std::set<const GlobalValue*>::iterator i = ExtWeakSymbols.begin(),
137 e = ExtWeakSymbols.end(); i != e; ++i) {
138 const GlobalValue *GV = *i;
139 std::string Name = Mang->getValueName(GV);
140 O << TAI->getWeakRefDirective() << Name << '\n';
144 if (TAI->getSetDirective()) {
145 if (!M.alias_empty())
146 SwitchToTextSection(TAI->getTextSection());
149 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
151 std::string Name = Mang->getValueName(I);
154 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
155 Target = Mang->getValueName(GV);
157 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
158 O << "\t.globl\t" << Name << '\n';
159 else if (I->hasWeakLinkage())
160 O << TAI->getWeakRefDirective() << Name << '\n';
161 else if (!I->hasInternalLinkage())
162 assert(0 && "Invalid alias linkage");
164 if (I->hasHiddenVisibility()) {
165 if (const char *Directive = TAI->getHiddenDirective())
166 O << Directive << Name << '\n';
167 } else if (I->hasProtectedVisibility()) {
168 if (const char *Directive = TAI->getProtectedDirective())
169 O << Directive << Name << '\n';
172 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
174 // If the aliasee has external weak linkage it can be referenced only by
175 // alias itself. In this case it can be not in ExtWeakSymbols list. Emit
176 // weak reference in such case.
177 if (GV->hasExternalWeakLinkage()) {
178 if (TAI->getWeakRefDirective())
179 O << TAI->getWeakRefDirective() << Target << '\n';
181 O << "\t.globl\t" << Target << '\n';
186 CollectorModuleMetadata *CMM = getAnalysisToUpdate<CollectorModuleMetadata>();
187 assert(CMM && "AsmPrinter didn't require CollectorModuleMetadata?");
188 for (CollectorModuleMetadata::iterator I = CMM->end(),
189 E = CMM->begin(); I != E; )
190 (*--I)->finishAssembly(O, *this, *TAI);
192 // If we don't have any trampolines, then we don't require stack memory
193 // to be executable. Some targets have a directive to declare this.
194 Function* InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
195 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
196 if (TAI->getNonexecutableStackDirective())
197 O << TAI->getNonexecutableStackDirective() << '\n';
199 delete Mang; Mang = 0;
203 std::string AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) {
204 assert(MF && "No machine function?");
205 std::string Name = MF->getFunction()->getName();
207 Name = Mang->getValueName(MF->getFunction());
208 return Mang->makeNameProper(Name + ".eh", TAI->getGlobalPrefix());
211 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
212 // What's my mangled name?
213 CurrentFnName = Mang->getValueName(MF.getFunction());
214 IncrementFunctionNumber();
217 /// EmitConstantPool - Print to the current output stream assembly
218 /// representations of the constants in the constant pool MCP. This is
219 /// used to print out constants which have been "spilled to memory" by
220 /// the code generator.
222 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
223 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
224 if (CP.empty()) return;
226 // Some targets require 4-, 8-, and 16- byte constant literals to be placed
227 // in special sections.
228 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > FourByteCPs;
229 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > EightByteCPs;
230 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > SixteenByteCPs;
231 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > OtherCPs;
232 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > TargetCPs;
233 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
234 MachineConstantPoolEntry CPE = CP[i];
235 const Type *Ty = CPE.getType();
236 if (TAI->getFourByteConstantSection() &&
237 TM.getTargetData()->getABITypeSize(Ty) == 4)
238 FourByteCPs.push_back(std::make_pair(CPE, i));
239 else if (TAI->getEightByteConstantSection() &&
240 TM.getTargetData()->getABITypeSize(Ty) == 8)
241 EightByteCPs.push_back(std::make_pair(CPE, i));
242 else if (TAI->getSixteenByteConstantSection() &&
243 TM.getTargetData()->getABITypeSize(Ty) == 16)
244 SixteenByteCPs.push_back(std::make_pair(CPE, i));
246 OtherCPs.push_back(std::make_pair(CPE, i));
249 unsigned Alignment = MCP->getConstantPoolAlignment();
250 EmitConstantPool(Alignment, TAI->getFourByteConstantSection(), FourByteCPs);
251 EmitConstantPool(Alignment, TAI->getEightByteConstantSection(), EightByteCPs);
252 EmitConstantPool(Alignment, TAI->getSixteenByteConstantSection(),
254 EmitConstantPool(Alignment, TAI->getConstantPoolSection(), OtherCPs);
257 void AsmPrinter::EmitConstantPool(unsigned Alignment, const char *Section,
258 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > &CP) {
259 if (CP.empty()) return;
261 SwitchToDataSection(Section);
262 EmitAlignment(Alignment);
263 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
264 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
265 << CP[i].second << ":\t\t\t\t\t" << TAI->getCommentString() << ' ';
266 WriteTypeSymbolic(O, CP[i].first.getType(), 0) << '\n';
267 if (CP[i].first.isMachineConstantPoolEntry())
268 EmitMachineConstantPoolValue(CP[i].first.Val.MachineCPVal);
270 EmitGlobalConstant(CP[i].first.Val.ConstVal);
272 const Type *Ty = CP[i].first.getType();
274 TM.getTargetData()->getABITypeSize(Ty);
275 unsigned ValEnd = CP[i].first.getOffset() + EntSize;
276 // Emit inter-object padding for alignment.
277 EmitZeros(CP[i+1].first.getOffset()-ValEnd);
282 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
283 /// by the current function to the current output stream.
285 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
286 MachineFunction &MF) {
287 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
288 if (JT.empty()) return;
290 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
292 // Pick the directive to use to print the jump table entries, and switch to
293 // the appropriate section.
294 TargetLowering *LoweringInfo = TM.getTargetLowering();
296 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
297 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
298 !JumpTableDataSection) {
299 // In PIC mode, we need to emit the jump table to the same section as the
300 // function body itself, otherwise the label differences won't make sense.
301 // We should also do if the section name is NULL.
302 const Function *F = MF.getFunction();
303 SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
305 SwitchToDataSection(JumpTableDataSection);
308 EmitAlignment(Log2_32(MJTI->getAlignment()));
310 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
311 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
313 // If this jump table was deleted, ignore it.
314 if (JTBBs.empty()) continue;
316 // For PIC codegen, if possible we want to use the SetDirective to reduce
317 // the number of relocations the assembler will generate for the jump table.
318 // Set directives are all printed before the jump table itself.
319 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
320 if (TAI->getSetDirective() && IsPic)
321 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
322 if (EmittedSets.insert(JTBBs[ii]))
323 printPICJumpTableSetLabel(i, JTBBs[ii]);
325 // On some targets (e.g. darwin) we want to emit two consequtive labels
326 // before each jump table. The first label is never referenced, but tells
327 // the assembler and linker the extents of the jump table object. The
328 // second label is actually referenced by the code.
329 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
330 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
332 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
333 << '_' << i << ":\n";
335 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
336 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
342 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
343 const MachineBasicBlock *MBB,
344 unsigned uid) const {
345 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
347 // Use JumpTableDirective otherwise honor the entry size from the jump table
349 const char *JTEntryDirective = TAI->getJumpTableDirective();
350 bool HadJTEntryDirective = JTEntryDirective != NULL;
351 if (!HadJTEntryDirective) {
352 JTEntryDirective = MJTI->getEntrySize() == 4 ?
353 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
356 O << JTEntryDirective << ' ';
358 // If we have emitted set directives for the jump table entries, print
359 // them rather than the entries themselves. If we're emitting PIC, then
360 // emit the table entries as differences between two text section labels.
361 // If we're emitting non-PIC code, then emit the entries as direct
362 // references to the target basic blocks.
364 if (TAI->getSetDirective()) {
365 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
366 << '_' << uid << "_set_" << MBB->getNumber();
368 printBasicBlockLabel(MBB, false, false, false);
369 // If the arch uses custom Jump Table directives, don't calc relative to
371 if (!HadJTEntryDirective)
372 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
373 << getFunctionNumber() << '_' << uid;
376 printBasicBlockLabel(MBB, false, false, false);
381 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
382 /// special global used by LLVM. If so, emit it and return true, otherwise
383 /// do nothing and return false.
384 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
385 if (GV->getName() == "llvm.used") {
386 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
387 EmitLLVMUsedList(GV->getInitializer());
391 // Ignore debug and non-emitted data.
392 if (GV->getSection() == "llvm.metadata") return true;
394 if (!GV->hasAppendingLinkage()) return false;
396 assert(GV->hasInitializer() && "Not a special LLVM global!");
398 const TargetData *TD = TM.getTargetData();
399 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
400 if (GV->getName() == "llvm.global_ctors" && GV->use_empty()) {
401 SwitchToDataSection(TAI->getStaticCtorsSection());
402 EmitAlignment(Align, 0);
403 EmitXXStructorList(GV->getInitializer());
407 if (GV->getName() == "llvm.global_dtors" && GV->use_empty()) {
408 SwitchToDataSection(TAI->getStaticDtorsSection());
409 EmitAlignment(Align, 0);
410 EmitXXStructorList(GV->getInitializer());
417 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
418 /// global in the specified llvm.used list as being used with this directive.
419 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
420 const char *Directive = TAI->getUsedDirective();
422 // Should be an array of 'sbyte*'.
423 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
424 if (InitList == 0) return;
426 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
428 EmitConstantValueOnly(InitList->getOperand(i));
433 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
434 /// function pointers, ignoring the init priority.
435 void AsmPrinter::EmitXXStructorList(Constant *List) {
436 // Should be an array of '{ int, void ()* }' structs. The first value is the
437 // init priority, which we ignore.
438 if (!isa<ConstantArray>(List)) return;
439 ConstantArray *InitList = cast<ConstantArray>(List);
440 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
441 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
442 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
444 if (CS->getOperand(1)->isNullValue())
445 return; // Found a null terminator, exit printing.
446 // Emit the function pointer.
447 EmitGlobalConstant(CS->getOperand(1));
451 /// getGlobalLinkName - Returns the asm/link name of of the specified
452 /// global variable. Should be overridden by each target asm printer to
453 /// generate the appropriate value.
454 const std::string AsmPrinter::getGlobalLinkName(const GlobalVariable *GV) const{
455 std::string LinkName;
457 if (isa<Function>(GV)) {
458 LinkName += TAI->getFunctionAddrPrefix();
459 LinkName += Mang->getValueName(GV);
460 LinkName += TAI->getFunctionAddrSuffix();
462 LinkName += TAI->getGlobalVarAddrPrefix();
463 LinkName += Mang->getValueName(GV);
464 LinkName += TAI->getGlobalVarAddrSuffix();
470 /// EmitExternalGlobal - Emit the external reference to a global variable.
471 /// Should be overridden if an indirect reference should be used.
472 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
473 O << getGlobalLinkName(GV);
478 //===----------------------------------------------------------------------===//
479 /// LEB 128 number encoding.
481 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
482 /// representing an unsigned leb128 value.
483 void AsmPrinter::PrintULEB128(unsigned Value) const {
485 unsigned Byte = Value & 0x7f;
487 if (Value) Byte |= 0x80;
488 O << "0x" << std::hex << Byte << std::dec;
489 if (Value) O << ", ";
493 /// SizeULEB128 - Compute the number of bytes required for an unsigned leb128
495 unsigned AsmPrinter::SizeULEB128(unsigned Value) {
499 Size += sizeof(int8_t);
504 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
505 /// representing a signed leb128 value.
506 void AsmPrinter::PrintSLEB128(int Value) const {
507 int Sign = Value >> (8 * sizeof(Value) - 1);
511 unsigned Byte = Value & 0x7f;
513 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
514 if (IsMore) Byte |= 0x80;
515 O << "0x" << std::hex << Byte << std::dec;
516 if (IsMore) O << ", ";
520 /// SizeSLEB128 - Compute the number of bytes required for a signed leb128
522 unsigned AsmPrinter::SizeSLEB128(int Value) {
524 int Sign = Value >> (8 * sizeof(Value) - 1);
528 unsigned Byte = Value & 0x7f;
530 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
531 Size += sizeof(int8_t);
536 //===--------------------------------------------------------------------===//
537 // Emission and print routines
540 /// PrintHex - Print a value as a hexidecimal value.
542 void AsmPrinter::PrintHex(int Value) const {
543 O << "0x" << std::hex << Value << std::dec;
546 /// EOL - Print a newline character to asm stream. If a comment is present
547 /// then it will be printed first. Comments should not contain '\n'.
548 void AsmPrinter::EOL() const {
552 void AsmPrinter::EOL(const std::string &Comment) const {
553 if (VerboseAsm && !Comment.empty()) {
555 << TAI->getCommentString()
562 void AsmPrinter::EOL(const char* Comment) const {
563 if (VerboseAsm && *Comment) {
565 << TAI->getCommentString()
572 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
573 /// unsigned leb128 value.
574 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
575 if (TAI->hasLEB128()) {
579 O << TAI->getData8bitsDirective();
584 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
585 /// signed leb128 value.
586 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
587 if (TAI->hasLEB128()) {
591 O << TAI->getData8bitsDirective();
596 /// EmitInt8 - Emit a byte directive and value.
598 void AsmPrinter::EmitInt8(int Value) const {
599 O << TAI->getData8bitsDirective();
600 PrintHex(Value & 0xFF);
603 /// EmitInt16 - Emit a short directive and value.
605 void AsmPrinter::EmitInt16(int Value) const {
606 O << TAI->getData16bitsDirective();
607 PrintHex(Value & 0xFFFF);
610 /// EmitInt32 - Emit a long directive and value.
612 void AsmPrinter::EmitInt32(int Value) const {
613 O << TAI->getData32bitsDirective();
617 /// EmitInt64 - Emit a long long directive and value.
619 void AsmPrinter::EmitInt64(uint64_t Value) const {
620 if (TAI->getData64bitsDirective()) {
621 O << TAI->getData64bitsDirective();
624 if (TM.getTargetData()->isBigEndian()) {
625 EmitInt32(unsigned(Value >> 32)); O << '\n';
626 EmitInt32(unsigned(Value));
628 EmitInt32(unsigned(Value)); O << '\n';
629 EmitInt32(unsigned(Value >> 32));
634 /// toOctal - Convert the low order bits of X into an octal digit.
636 static inline char toOctal(int X) {
640 /// printStringChar - Print a char, escaped if necessary.
642 static void printStringChar(std::ostream &O, unsigned char C) {
645 } else if (C == '\\') {
647 } else if (isprint(C)) {
651 case '\b': O << "\\b"; break;
652 case '\f': O << "\\f"; break;
653 case '\n': O << "\\n"; break;
654 case '\r': O << "\\r"; break;
655 case '\t': O << "\\t"; break;
658 O << toOctal(C >> 6);
659 O << toOctal(C >> 3);
660 O << toOctal(C >> 0);
666 /// EmitString - Emit a string with quotes and a null terminator.
667 /// Special characters are emitted properly.
668 /// \literal (Eg. '\t') \endliteral
669 void AsmPrinter::EmitString(const std::string &String) const {
670 const char* AscizDirective = TAI->getAscizDirective();
674 O << TAI->getAsciiDirective();
676 for (unsigned i = 0, N = String.size(); i < N; ++i) {
677 unsigned char C = String[i];
678 printStringChar(O, C);
687 /// EmitFile - Emit a .file directive.
688 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
689 O << "\t.file\t" << Number << " \"";
690 for (unsigned i = 0, N = Name.size(); i < N; ++i) {
691 unsigned char C = Name[i];
692 printStringChar(O, C);
698 //===----------------------------------------------------------------------===//
700 // EmitAlignment - Emit an alignment directive to the specified power of
701 // two boundary. For example, if you pass in 3 here, you will get an 8
702 // byte alignment. If a global value is specified, and if that global has
703 // an explicit alignment requested, it will unconditionally override the
704 // alignment request. However, if ForcedAlignBits is specified, this value
705 // has final say: the ultimate alignment will be the max of ForcedAlignBits
706 // and the alignment computed with NumBits and the global.
710 // if (GV && GV->hasalignment) Align = GV->getalignment();
711 // Align = std::max(Align, ForcedAlignBits);
713 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
714 unsigned ForcedAlignBits,
715 bool UseFillExpr) const {
716 if (GV && GV->getAlignment())
717 NumBits = Log2_32(GV->getAlignment());
718 NumBits = std::max(NumBits, ForcedAlignBits);
720 if (NumBits == 0) return; // No need to emit alignment.
721 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
722 O << TAI->getAlignDirective() << NumBits;
724 unsigned FillValue = TAI->getTextAlignFillValue();
725 UseFillExpr &= IsInTextSection && FillValue;
726 if (UseFillExpr) O << ",0x" << std::hex << FillValue << std::dec;
731 /// EmitZeros - Emit a block of zeros.
733 void AsmPrinter::EmitZeros(uint64_t NumZeros) const {
735 if (TAI->getZeroDirective()) {
736 O << TAI->getZeroDirective() << NumZeros;
737 if (TAI->getZeroDirectiveSuffix())
738 O << TAI->getZeroDirectiveSuffix();
741 for (; NumZeros; --NumZeros)
742 O << TAI->getData8bitsDirective() << "0\n";
747 // Print out the specified constant, without a storage class. Only the
748 // constants valid in constant expressions can occur here.
749 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
750 if (CV->isNullValue() || isa<UndefValue>(CV))
752 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
753 O << CI->getZExtValue();
754 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
755 // This is a constant address for a global variable or function. Use the
756 // name of the variable or function as the address value, possibly
757 // decorating it with GlobalVarAddrPrefix/Suffix or
758 // FunctionAddrPrefix/Suffix (these all default to "" )
759 if (isa<Function>(GV)) {
760 O << TAI->getFunctionAddrPrefix()
761 << Mang->getValueName(GV)
762 << TAI->getFunctionAddrSuffix();
764 O << TAI->getGlobalVarAddrPrefix()
765 << Mang->getValueName(GV)
766 << TAI->getGlobalVarAddrSuffix();
768 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
769 const TargetData *TD = TM.getTargetData();
770 unsigned Opcode = CE->getOpcode();
772 case Instruction::GetElementPtr: {
773 // generate a symbolic expression for the byte address
774 const Constant *ptrVal = CE->getOperand(0);
775 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
776 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
780 EmitConstantValueOnly(ptrVal);
782 O << ") + " << Offset;
784 O << ") - " << -Offset;
786 EmitConstantValueOnly(ptrVal);
790 case Instruction::Trunc:
791 case Instruction::ZExt:
792 case Instruction::SExt:
793 case Instruction::FPTrunc:
794 case Instruction::FPExt:
795 case Instruction::UIToFP:
796 case Instruction::SIToFP:
797 case Instruction::FPToUI:
798 case Instruction::FPToSI:
799 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
801 case Instruction::BitCast:
802 return EmitConstantValueOnly(CE->getOperand(0));
804 case Instruction::IntToPtr: {
805 // Handle casts to pointers by changing them into casts to the appropriate
806 // integer type. This promotes constant folding and simplifies this code.
807 Constant *Op = CE->getOperand(0);
808 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
809 return EmitConstantValueOnly(Op);
813 case Instruction::PtrToInt: {
814 // Support only foldable casts to/from pointers that can be eliminated by
815 // changing the pointer to the appropriately sized integer type.
816 Constant *Op = CE->getOperand(0);
817 const Type *Ty = CE->getType();
819 // We can emit the pointer value into this slot if the slot is an
820 // integer slot greater or equal to the size of the pointer.
821 if (Ty->isInteger() &&
822 TD->getABITypeSize(Ty) >= TD->getABITypeSize(Op->getType()))
823 return EmitConstantValueOnly(Op);
825 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
826 EmitConstantValueOnly(Op);
829 case Instruction::Add:
830 case Instruction::Sub:
831 case Instruction::And:
832 case Instruction::Or:
833 case Instruction::Xor:
835 EmitConstantValueOnly(CE->getOperand(0));
838 case Instruction::Add:
841 case Instruction::Sub:
844 case Instruction::And:
847 case Instruction::Or:
850 case Instruction::Xor:
857 EmitConstantValueOnly(CE->getOperand(1));
861 assert(0 && "Unsupported operator!");
864 assert(0 && "Unknown constant value!");
868 /// printAsCString - Print the specified array as a C compatible string, only if
869 /// the predicate isString is true.
871 static void printAsCString(std::ostream &O, const ConstantArray *CVA,
873 assert(CVA->isString() && "Array is not string compatible!");
876 for (unsigned i = 0; i != LastElt; ++i) {
878 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
879 printStringChar(O, C);
884 /// EmitString - Emit a zero-byte-terminated string constant.
886 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
887 unsigned NumElts = CVA->getNumOperands();
888 if (TAI->getAscizDirective() && NumElts &&
889 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
890 O << TAI->getAscizDirective();
891 printAsCString(O, CVA, NumElts-1);
893 O << TAI->getAsciiDirective();
894 printAsCString(O, CVA, NumElts);
899 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
900 void AsmPrinter::EmitGlobalConstant(const Constant *CV) {
901 const TargetData *TD = TM.getTargetData();
902 unsigned Size = TD->getABITypeSize(CV->getType());
904 if (CV->isNullValue() || isa<UndefValue>(CV)) {
907 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
908 if (CVA->isString()) {
910 } else { // Not a string. Print the values in successive locations
911 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
912 EmitGlobalConstant(CVA->getOperand(i));
915 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
916 // Print the fields in successive locations. Pad to align if needed!
917 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
918 uint64_t sizeSoFar = 0;
919 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
920 const Constant* field = CVS->getOperand(i);
922 // Check if padding is needed and insert one or more 0s.
923 uint64_t fieldSize = TD->getABITypeSize(field->getType());
924 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
925 - cvsLayout->getElementOffset(i)) - fieldSize;
926 sizeSoFar += fieldSize + padSize;
928 // Now print the actual field value.
929 EmitGlobalConstant(field);
931 // Insert padding - this may include padding to increase the size of the
932 // current field up to the ABI size (if the struct is not packed) as well
933 // as padding to ensure that the next field starts at the right offset.
936 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
937 "Layout of constant struct may be incorrect!");
939 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
940 // FP Constants are printed as integer constants to avoid losing
942 if (CFP->getType() == Type::DoubleTy) {
943 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
944 uint64_t i = CFP->getValueAPF().convertToAPInt().getZExtValue();
945 if (TAI->getData64bitsDirective())
946 O << TAI->getData64bitsDirective() << i << '\t'
947 << TAI->getCommentString() << " double value: " << Val << '\n';
948 else if (TD->isBigEndian()) {
949 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
950 << '\t' << TAI->getCommentString()
951 << " double most significant word " << Val << '\n';
952 O << TAI->getData32bitsDirective() << unsigned(i)
953 << '\t' << TAI->getCommentString()
954 << " double least significant word " << Val << '\n';
956 O << TAI->getData32bitsDirective() << unsigned(i)
957 << '\t' << TAI->getCommentString()
958 << " double least significant word " << Val << '\n';
959 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
960 << '\t' << TAI->getCommentString()
961 << " double most significant word " << Val << '\n';
964 } else if (CFP->getType() == Type::FloatTy) {
965 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
966 O << TAI->getData32bitsDirective()
967 << CFP->getValueAPF().convertToAPInt().getZExtValue()
968 << '\t' << TAI->getCommentString() << " float " << Val << '\n';
970 } else if (CFP->getType() == Type::X86_FP80Ty) {
971 // all long double variants are printed as hex
972 // api needed to prevent premature destruction
973 APInt api = CFP->getValueAPF().convertToAPInt();
974 const uint64_t *p = api.getRawData();
975 APFloat DoubleVal = CFP->getValueAPF();
976 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven);
977 if (TD->isBigEndian()) {
978 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
979 << '\t' << TAI->getCommentString()
980 << " long double most significant halfword of ~"
981 << DoubleVal.convertToDouble() << '\n';
982 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
983 << '\t' << TAI->getCommentString()
984 << " long double next halfword\n";
985 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
986 << '\t' << TAI->getCommentString()
987 << " long double next halfword\n";
988 O << TAI->getData16bitsDirective() << uint16_t(p[0])
989 << '\t' << TAI->getCommentString()
990 << " long double next halfword\n";
991 O << TAI->getData16bitsDirective() << uint16_t(p[1])
992 << '\t' << TAI->getCommentString()
993 << " long double least significant halfword\n";
995 O << TAI->getData16bitsDirective() << uint16_t(p[1])
996 << '\t' << TAI->getCommentString()
997 << " long double least significant halfword of ~"
998 << DoubleVal.convertToDouble() << '\n';
999 O << TAI->getData16bitsDirective() << uint16_t(p[0])
1000 << '\t' << TAI->getCommentString()
1001 << " long double next halfword\n";
1002 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
1003 << '\t' << TAI->getCommentString()
1004 << " long double next halfword\n";
1005 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
1006 << '\t' << TAI->getCommentString()
1007 << " long double next halfword\n";
1008 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
1009 << '\t' << TAI->getCommentString()
1010 << " long double most significant halfword\n";
1012 EmitZeros(Size - TD->getTypeStoreSize(Type::X86_FP80Ty));
1014 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1015 // all long double variants are printed as hex
1016 // api needed to prevent premature destruction
1017 APInt api = CFP->getValueAPF().convertToAPInt();
1018 const uint64_t *p = api.getRawData();
1019 if (TD->isBigEndian()) {
1020 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1021 << '\t' << TAI->getCommentString()
1022 << " long double most significant word\n";
1023 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1024 << '\t' << TAI->getCommentString()
1025 << " long double next word\n";
1026 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1027 << '\t' << TAI->getCommentString()
1028 << " long double next word\n";
1029 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1030 << '\t' << TAI->getCommentString()
1031 << " long double least significant word\n";
1033 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1034 << '\t' << TAI->getCommentString()
1035 << " long double least significant word\n";
1036 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1037 << '\t' << TAI->getCommentString()
1038 << " long double next word\n";
1039 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1040 << '\t' << TAI->getCommentString()
1041 << " long double next word\n";
1042 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1043 << '\t' << TAI->getCommentString()
1044 << " long double most significant word\n";
1047 } else assert(0 && "Floating point constant type not handled");
1048 } else if (CV->getType() == Type::Int64Ty) {
1049 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1050 uint64_t Val = CI->getZExtValue();
1052 if (TAI->getData64bitsDirective())
1053 O << TAI->getData64bitsDirective() << Val << '\n';
1054 else if (TD->isBigEndian()) {
1055 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1056 << '\t' << TAI->getCommentString()
1057 << " Double-word most significant word " << Val << '\n';
1058 O << TAI->getData32bitsDirective() << unsigned(Val)
1059 << '\t' << TAI->getCommentString()
1060 << " Double-word least significant word " << Val << '\n';
1062 O << TAI->getData32bitsDirective() << unsigned(Val)
1063 << '\t' << TAI->getCommentString()
1064 << " Double-word least significant word " << Val << '\n';
1065 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1066 << '\t' << TAI->getCommentString()
1067 << " Double-word most significant word " << Val << '\n';
1071 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1072 const VectorType *PTy = CP->getType();
1074 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
1075 EmitGlobalConstant(CP->getOperand(I));
1080 const Type *type = CV->getType();
1081 printDataDirective(type);
1082 EmitConstantValueOnly(CV);
1083 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1085 << TAI->getCommentString()
1086 << " 0x" << CI->getValue().toStringUnsigned(16);
1092 AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1093 // Target doesn't support this yet!
1097 /// PrintSpecial - Print information related to the specified machine instr
1098 /// that is independent of the operand, and may be independent of the instr
1099 /// itself. This can be useful for portably encoding the comment character
1100 /// or other bits of target-specific knowledge into the asmstrings. The
1101 /// syntax used is ${:comment}. Targets can override this to add support
1102 /// for their own strange codes.
1103 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) {
1104 if (!strcmp(Code, "private")) {
1105 O << TAI->getPrivateGlobalPrefix();
1106 } else if (!strcmp(Code, "comment")) {
1107 O << TAI->getCommentString();
1108 } else if (!strcmp(Code, "uid")) {
1109 // Assign a unique ID to this machine instruction.
1110 static const MachineInstr *LastMI = 0;
1111 static const Function *F = 0;
1112 static unsigned Counter = 0U-1;
1114 // Comparing the address of MI isn't sufficient, because machineinstrs may
1115 // be allocated to the same address across functions.
1116 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1118 // If this is a new machine instruction, bump the counter.
1119 if (LastMI != MI || F != ThisF) {
1126 cerr << "Unknown special formatter '" << Code
1127 << "' for machine instr: " << *MI;
1133 /// printInlineAsm - This method formats and prints the specified machine
1134 /// instruction that is an inline asm.
1135 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1136 unsigned NumOperands = MI->getNumOperands();
1138 // Count the number of register definitions.
1139 unsigned NumDefs = 0;
1140 for (; MI->getOperand(NumDefs).isRegister() && MI->getOperand(NumDefs).isDef();
1142 assert(NumDefs != NumOperands-1 && "No asm string?");
1144 assert(MI->getOperand(NumDefs).isExternalSymbol() && "No asm string?");
1146 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1147 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1149 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1150 // These are useful to see where empty asm's wound up.
1151 if (AsmStr[0] == 0) {
1152 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1156 O << TAI->getInlineAsmStart() << "\n\t";
1158 // The variant of the current asmprinter.
1159 int AsmPrinterVariant = TAI->getAssemblerDialect();
1161 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1162 const char *LastEmitted = AsmStr; // One past the last character emitted.
1164 while (*LastEmitted) {
1165 switch (*LastEmitted) {
1167 // Not a special case, emit the string section literally.
1168 const char *LiteralEnd = LastEmitted+1;
1169 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1170 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1172 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1173 O.write(LastEmitted, LiteralEnd-LastEmitted);
1174 LastEmitted = LiteralEnd;
1178 ++LastEmitted; // Consume newline character.
1179 O << '\n'; // Indent code with newline.
1182 ++LastEmitted; // Consume '$' character.
1186 switch (*LastEmitted) {
1187 default: Done = false; break;
1188 case '$': // $$ -> $
1189 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1191 ++LastEmitted; // Consume second '$' character.
1193 case '(': // $( -> same as GCC's { character.
1194 ++LastEmitted; // Consume '(' character.
1195 if (CurVariant != -1) {
1196 cerr << "Nested variants found in inline asm string: '"
1200 CurVariant = 0; // We're in the first variant now.
1203 ++LastEmitted; // consume '|' character.
1204 if (CurVariant == -1) {
1205 cerr << "Found '|' character outside of variant in inline asm "
1206 << "string: '" << AsmStr << "'\n";
1209 ++CurVariant; // We're in the next variant.
1211 case ')': // $) -> same as GCC's } char.
1212 ++LastEmitted; // consume ')' character.
1213 if (CurVariant == -1) {
1214 cerr << "Found '}' character outside of variant in inline asm "
1215 << "string: '" << AsmStr << "'\n";
1223 bool HasCurlyBraces = false;
1224 if (*LastEmitted == '{') { // ${variable}
1225 ++LastEmitted; // Consume '{' character.
1226 HasCurlyBraces = true;
1229 const char *IDStart = LastEmitted;
1232 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1233 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1234 cerr << "Bad $ operand number in inline asm string: '"
1238 LastEmitted = IDEnd;
1240 char Modifier[2] = { 0, 0 };
1242 if (HasCurlyBraces) {
1243 // If we have curly braces, check for a modifier character. This
1244 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1245 if (*LastEmitted == ':') {
1246 ++LastEmitted; // Consume ':' character.
1247 if (*LastEmitted == 0) {
1248 cerr << "Bad ${:} expression in inline asm string: '"
1253 Modifier[0] = *LastEmitted;
1254 ++LastEmitted; // Consume modifier character.
1257 if (*LastEmitted != '}') {
1258 cerr << "Bad ${} expression in inline asm string: '"
1262 ++LastEmitted; // Consume '}' character.
1265 if ((unsigned)Val >= NumOperands-1) {
1266 cerr << "Invalid $ operand number in inline asm string: '"
1271 // Okay, we finally have a value number. Ask the target to print this
1273 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1278 // Scan to find the machine operand number for the operand.
1279 for (; Val; --Val) {
1280 if (OpNo >= MI->getNumOperands()) break;
1281 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1282 OpNo += (OpFlags >> 3) + 1;
1285 if (OpNo >= MI->getNumOperands()) {
1288 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1289 ++OpNo; // Skip over the ID number.
1291 if (Modifier[0]=='l') // labels are target independent
1292 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1293 false, false, false);
1295 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1296 if ((OpFlags & 7) == 4 /*ADDR MODE*/) {
1297 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1298 Modifier[0] ? Modifier : 0);
1300 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1301 Modifier[0] ? Modifier : 0);
1306 cerr << "Invalid operand found in inline asm: '"
1316 O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1319 /// printImplicitDef - This method prints the specified machine instruction
1320 /// that is an implicit def.
1321 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1322 O << '\t' << TAI->getCommentString() << " implicit-def: "
1323 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1326 /// printLabel - This method prints a local label used by debug and
1327 /// exception handling tables.
1328 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1329 printLabel(MI->getOperand(0).getImm());
1332 void AsmPrinter::printLabel(unsigned Id) const {
1333 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1336 /// printDeclare - This method prints a local variable declaration used by
1338 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1339 /// entry into dwarf table.
1340 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1341 int FI = MI->getOperand(0).getIndex();
1342 GlobalValue *GV = MI->getOperand(1).getGlobal();
1343 MMI->RecordVariable(GV, FI);
1346 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1347 /// instruction, using the specified assembler variant. Targets should
1348 /// overried this to format as appropriate.
1349 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1350 unsigned AsmVariant, const char *ExtraCode) {
1351 // Target doesn't support this yet!
1355 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1356 unsigned AsmVariant,
1357 const char *ExtraCode) {
1358 // Target doesn't support this yet!
1362 /// printBasicBlockLabel - This method prints the label for the specified
1363 /// MachineBasicBlock
1364 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1367 bool printComment) const {
1369 unsigned Align = MBB->getAlignment();
1371 EmitAlignment(Log2_32(Align));
1374 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1375 << MBB->getNumber();
1378 if (printComment && MBB->getBasicBlock())
1379 O << '\t' << TAI->getCommentString() << ' '
1380 << MBB->getBasicBlock()->getName();
1383 /// printPICJumpTableSetLabel - This method prints a set label for the
1384 /// specified MachineBasicBlock for a jumptable entry.
1385 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1386 const MachineBasicBlock *MBB) const {
1387 if (!TAI->getSetDirective())
1390 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1391 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1392 printBasicBlockLabel(MBB, false, false, false);
1393 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1394 << '_' << uid << '\n';
1397 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1398 const MachineBasicBlock *MBB) const {
1399 if (!TAI->getSetDirective())
1402 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1403 << getFunctionNumber() << '_' << uid << '_' << uid2
1404 << "_set_" << MBB->getNumber() << ',';
1405 printBasicBlockLabel(MBB, false, false, false);
1406 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1407 << '_' << uid << '_' << uid2 << '\n';
1410 /// printDataDirective - This method prints the asm directive for the
1412 void AsmPrinter::printDataDirective(const Type *type) {
1413 const TargetData *TD = TM.getTargetData();
1414 switch (type->getTypeID()) {
1415 case Type::IntegerTyID: {
1416 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1418 O << TAI->getData8bitsDirective();
1419 else if (BitWidth <= 16)
1420 O << TAI->getData16bitsDirective();
1421 else if (BitWidth <= 32)
1422 O << TAI->getData32bitsDirective();
1423 else if (BitWidth <= 64) {
1424 assert(TAI->getData64bitsDirective() &&
1425 "Target cannot handle 64-bit constant exprs!");
1426 O << TAI->getData64bitsDirective();
1430 case Type::PointerTyID:
1431 if (TD->getPointerSize() == 8) {
1432 assert(TAI->getData64bitsDirective() &&
1433 "Target cannot handle 64-bit pointer exprs!");
1434 O << TAI->getData64bitsDirective();
1436 O << TAI->getData32bitsDirective();
1439 case Type::FloatTyID: case Type::DoubleTyID:
1440 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1441 assert (0 && "Should have already output floating point constant.");
1443 assert (0 && "Can't handle printing this type of thing");
1448 void AsmPrinter::printSuffixedName(std::string &Name, const char* Suffix) {
1450 O << '\"' << TAI->getPrivateGlobalPrefix() <<
1451 Name.substr(1, Name.length()-2) << Suffix << '\"';
1453 O << TAI->getPrivateGlobalPrefix() << Name << Suffix;