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"
34 #include "llvm/ADT/SmallString.h"
38 char AsmPrinter::ID = 0;
39 AsmPrinter::AsmPrinter(std::ostream &o, TargetMachine &tm,
40 const TargetAsmInfo *T)
41 : MachineFunctionPass((intptr_t)&ID), FunctionNumber(0), O(o),
42 TM(tm), TAI(T), TRI(tm.getRegisterInfo()),
43 IsInTextSection(false)
46 std::string AsmPrinter::getSectionForFunction(const Function &F) const {
47 return TAI->getTextSection();
51 /// SwitchToTextSection - Switch to the specified text section of the executable
52 /// if we are not already in it!
54 void AsmPrinter::SwitchToTextSection(const char *NewSection,
55 const GlobalValue *GV) {
57 if (GV && GV->hasSection())
58 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
62 // If we're already in this section, we're done.
63 if (CurrentSection == NS) return;
65 // Close the current section, if applicable.
66 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
67 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
71 if (!CurrentSection.empty())
72 O << CurrentSection << TAI->getTextSectionStartSuffix() << '\n';
74 IsInTextSection = true;
77 /// SwitchToDataSection - Switch to the specified data section of the executable
78 /// if we are not already in it!
80 void AsmPrinter::SwitchToDataSection(const char *NewSection,
81 const GlobalValue *GV) {
83 if (GV && GV->hasSection())
84 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
88 // If we're already in this section, we're done.
89 if (CurrentSection == NS) return;
91 // Close the current section, if applicable.
92 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
93 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
97 if (!CurrentSection.empty())
98 O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
100 IsInTextSection = false;
104 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
105 MachineFunctionPass::getAnalysisUsage(AU);
106 AU.addRequired<CollectorModuleMetadata>();
109 bool AsmPrinter::doInitialization(Module &M) {
110 Mang = new Mangler(M, TAI->getGlobalPrefix());
112 CollectorModuleMetadata *CMM = getAnalysisToUpdate<CollectorModuleMetadata>();
113 assert(CMM && "AsmPrinter didn't require CollectorModuleMetadata?");
114 for (CollectorModuleMetadata::iterator I = CMM->begin(),
115 E = CMM->end(); I != E; ++I)
116 (*I)->beginAssembly(O, *this, *TAI);
118 if (!M.getModuleInlineAsm().empty())
119 O << TAI->getCommentString() << " Start of file scope inline assembly\n"
120 << M.getModuleInlineAsm()
121 << '\n' << TAI->getCommentString()
122 << " End of file scope inline assembly\n";
124 SwitchToDataSection(""); // Reset back to no section.
126 MMI = getAnalysisToUpdate<MachineModuleInfo>();
127 if (MMI) MMI->AnalyzeModule(M);
132 bool AsmPrinter::doFinalization(Module &M) {
133 if (TAI->getWeakRefDirective()) {
134 if (!ExtWeakSymbols.empty())
135 SwitchToDataSection("");
137 for (std::set<const GlobalValue*>::iterator i = ExtWeakSymbols.begin(),
138 e = ExtWeakSymbols.end(); i != e; ++i) {
139 const GlobalValue *GV = *i;
140 std::string Name = Mang->getValueName(GV);
141 O << TAI->getWeakRefDirective() << Name << '\n';
145 if (TAI->getSetDirective()) {
146 if (!M.alias_empty())
147 SwitchToTextSection(TAI->getTextSection());
150 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
152 std::string Name = Mang->getValueName(I);
155 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
156 Target = Mang->getValueName(GV);
158 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
159 O << "\t.globl\t" << Name << '\n';
160 else if (I->hasWeakLinkage())
161 O << TAI->getWeakRefDirective() << Name << '\n';
162 else if (!I->hasInternalLinkage())
163 assert(0 && "Invalid alias linkage");
165 if (I->hasHiddenVisibility()) {
166 if (const char *Directive = TAI->getHiddenDirective())
167 O << Directive << Name << '\n';
168 } else if (I->hasProtectedVisibility()) {
169 if (const char *Directive = TAI->getProtectedDirective())
170 O << Directive << Name << '\n';
173 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
175 // If the aliasee has external weak linkage it can be referenced only by
176 // alias itself. In this case it can be not in ExtWeakSymbols list. Emit
177 // weak reference in such case.
178 if (GV->hasExternalWeakLinkage()) {
179 if (TAI->getWeakRefDirective())
180 O << TAI->getWeakRefDirective() << Target << '\n';
182 O << "\t.globl\t" << Target << '\n';
187 CollectorModuleMetadata *CMM = getAnalysisToUpdate<CollectorModuleMetadata>();
188 assert(CMM && "AsmPrinter didn't require CollectorModuleMetadata?");
189 for (CollectorModuleMetadata::iterator I = CMM->end(),
190 E = CMM->begin(); I != E; )
191 (*--I)->finishAssembly(O, *this, *TAI);
193 // If we don't have any trampolines, then we don't require stack memory
194 // to be executable. Some targets have a directive to declare this.
195 Function* InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
196 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
197 if (TAI->getNonexecutableStackDirective())
198 O << TAI->getNonexecutableStackDirective() << '\n';
200 delete Mang; Mang = 0;
204 std::string AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) {
205 assert(MF && "No machine function?");
206 std::string Name = MF->getFunction()->getName();
208 Name = Mang->getValueName(MF->getFunction());
209 return Mang->makeNameProper(Name + ".eh", TAI->getGlobalPrefix());
212 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
213 // What's my mangled name?
214 CurrentFnName = Mang->getValueName(MF.getFunction());
215 IncrementFunctionNumber();
218 /// EmitConstantPool - Print to the current output stream assembly
219 /// representations of the constants in the constant pool MCP. This is
220 /// used to print out constants which have been "spilled to memory" by
221 /// the code generator.
223 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
224 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
225 if (CP.empty()) return;
227 // Some targets require 4-, 8-, and 16- byte constant literals to be placed
228 // in special sections.
229 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > FourByteCPs;
230 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > EightByteCPs;
231 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > SixteenByteCPs;
232 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > OtherCPs;
233 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > TargetCPs;
234 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
235 MachineConstantPoolEntry CPE = CP[i];
236 const Type *Ty = CPE.getType();
237 if (TAI->getFourByteConstantSection() &&
238 TM.getTargetData()->getABITypeSize(Ty) == 4)
239 FourByteCPs.push_back(std::make_pair(CPE, i));
240 else if (TAI->getEightByteConstantSection() &&
241 TM.getTargetData()->getABITypeSize(Ty) == 8)
242 EightByteCPs.push_back(std::make_pair(CPE, i));
243 else if (TAI->getSixteenByteConstantSection() &&
244 TM.getTargetData()->getABITypeSize(Ty) == 16)
245 SixteenByteCPs.push_back(std::make_pair(CPE, i));
247 OtherCPs.push_back(std::make_pair(CPE, i));
250 unsigned Alignment = MCP->getConstantPoolAlignment();
251 EmitConstantPool(Alignment, TAI->getFourByteConstantSection(), FourByteCPs);
252 EmitConstantPool(Alignment, TAI->getEightByteConstantSection(), EightByteCPs);
253 EmitConstantPool(Alignment, TAI->getSixteenByteConstantSection(),
255 EmitConstantPool(Alignment, TAI->getConstantPoolSection(), OtherCPs);
258 void AsmPrinter::EmitConstantPool(unsigned Alignment, const char *Section,
259 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > &CP) {
260 if (CP.empty()) return;
262 SwitchToDataSection(Section);
263 EmitAlignment(Alignment);
264 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
265 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
266 << CP[i].second << ":\t\t\t\t\t" << TAI->getCommentString() << ' ';
267 WriteTypeSymbolic(O, CP[i].first.getType(), 0) << '\n';
268 if (CP[i].first.isMachineConstantPoolEntry())
269 EmitMachineConstantPoolValue(CP[i].first.Val.MachineCPVal);
271 EmitGlobalConstant(CP[i].first.Val.ConstVal);
273 const Type *Ty = CP[i].first.getType();
275 TM.getTargetData()->getABITypeSize(Ty);
276 unsigned ValEnd = CP[i].first.getOffset() + EntSize;
277 // Emit inter-object padding for alignment.
278 EmitZeros(CP[i+1].first.getOffset()-ValEnd);
283 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
284 /// by the current function to the current output stream.
286 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
287 MachineFunction &MF) {
288 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
289 if (JT.empty()) return;
291 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
293 // Pick the directive to use to print the jump table entries, and switch to
294 // the appropriate section.
295 TargetLowering *LoweringInfo = TM.getTargetLowering();
297 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
298 const Function *F = MF.getFunction();
299 unsigned SectionFlags = TAI->SectionFlagsForGlobal(F);
300 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
301 !JumpTableDataSection ||
302 SectionFlags & SectionFlags::Linkonce) {
303 // In PIC mode, we need to emit the jump table to the same section as the
304 // function body itself, otherwise the label differences won't make sense.
305 // We should also do if the section name is NULL or function is declared in
306 // discardable section.
307 SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
309 SwitchToDataSection(JumpTableDataSection);
312 EmitAlignment(Log2_32(MJTI->getAlignment()));
314 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
315 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
317 // If this jump table was deleted, ignore it.
318 if (JTBBs.empty()) continue;
320 // For PIC codegen, if possible we want to use the SetDirective to reduce
321 // the number of relocations the assembler will generate for the jump table.
322 // Set directives are all printed before the jump table itself.
323 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
324 if (TAI->getSetDirective() && IsPic)
325 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
326 if (EmittedSets.insert(JTBBs[ii]))
327 printPICJumpTableSetLabel(i, JTBBs[ii]);
329 // On some targets (e.g. darwin) we want to emit two consequtive labels
330 // before each jump table. The first label is never referenced, but tells
331 // the assembler and linker the extents of the jump table object. The
332 // second label is actually referenced by the code.
333 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
334 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
336 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
337 << '_' << i << ":\n";
339 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
340 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
346 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
347 const MachineBasicBlock *MBB,
348 unsigned uid) const {
349 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
351 // Use JumpTableDirective otherwise honor the entry size from the jump table
353 const char *JTEntryDirective = TAI->getJumpTableDirective();
354 bool HadJTEntryDirective = JTEntryDirective != NULL;
355 if (!HadJTEntryDirective) {
356 JTEntryDirective = MJTI->getEntrySize() == 4 ?
357 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
360 O << JTEntryDirective << ' ';
362 // If we have emitted set directives for the jump table entries, print
363 // them rather than the entries themselves. If we're emitting PIC, then
364 // emit the table entries as differences between two text section labels.
365 // If we're emitting non-PIC code, then emit the entries as direct
366 // references to the target basic blocks.
368 if (TAI->getSetDirective()) {
369 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
370 << '_' << uid << "_set_" << MBB->getNumber();
372 printBasicBlockLabel(MBB, false, false, false);
373 // If the arch uses custom Jump Table directives, don't calc relative to
375 if (!HadJTEntryDirective)
376 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
377 << getFunctionNumber() << '_' << uid;
380 printBasicBlockLabel(MBB, false, false, false);
385 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
386 /// special global used by LLVM. If so, emit it and return true, otherwise
387 /// do nothing and return false.
388 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
389 if (GV->getName() == "llvm.used") {
390 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
391 EmitLLVMUsedList(GV->getInitializer());
395 // Ignore debug and non-emitted data.
396 if (GV->getSection() == "llvm.metadata") return true;
398 if (!GV->hasAppendingLinkage()) return false;
400 assert(GV->hasInitializer() && "Not a special LLVM global!");
402 const TargetData *TD = TM.getTargetData();
403 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
404 if (GV->getName() == "llvm.global_ctors" && GV->use_empty()) {
405 SwitchToDataSection(TAI->getStaticCtorsSection());
406 EmitAlignment(Align, 0);
407 EmitXXStructorList(GV->getInitializer());
411 if (GV->getName() == "llvm.global_dtors" && GV->use_empty()) {
412 SwitchToDataSection(TAI->getStaticDtorsSection());
413 EmitAlignment(Align, 0);
414 EmitXXStructorList(GV->getInitializer());
421 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
422 /// global in the specified llvm.used list as being used with this directive.
423 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
424 const char *Directive = TAI->getUsedDirective();
426 // Should be an array of 'sbyte*'.
427 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
428 if (InitList == 0) return;
430 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
432 EmitConstantValueOnly(InitList->getOperand(i));
437 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
438 /// function pointers, ignoring the init priority.
439 void AsmPrinter::EmitXXStructorList(Constant *List) {
440 // Should be an array of '{ int, void ()* }' structs. The first value is the
441 // init priority, which we ignore.
442 if (!isa<ConstantArray>(List)) return;
443 ConstantArray *InitList = cast<ConstantArray>(List);
444 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
445 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
446 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
448 if (CS->getOperand(1)->isNullValue())
449 return; // Found a null terminator, exit printing.
450 // Emit the function pointer.
451 EmitGlobalConstant(CS->getOperand(1));
455 /// getGlobalLinkName - Returns the asm/link name of of the specified
456 /// global variable. Should be overridden by each target asm printer to
457 /// generate the appropriate value.
458 const std::string AsmPrinter::getGlobalLinkName(const GlobalVariable *GV) const{
459 std::string LinkName;
461 if (isa<Function>(GV)) {
462 LinkName += TAI->getFunctionAddrPrefix();
463 LinkName += Mang->getValueName(GV);
464 LinkName += TAI->getFunctionAddrSuffix();
466 LinkName += TAI->getGlobalVarAddrPrefix();
467 LinkName += Mang->getValueName(GV);
468 LinkName += TAI->getGlobalVarAddrSuffix();
474 /// EmitExternalGlobal - Emit the external reference to a global variable.
475 /// Should be overridden if an indirect reference should be used.
476 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
477 O << getGlobalLinkName(GV);
482 //===----------------------------------------------------------------------===//
483 /// LEB 128 number encoding.
485 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
486 /// representing an unsigned leb128 value.
487 void AsmPrinter::PrintULEB128(unsigned Value) const {
489 unsigned Byte = Value & 0x7f;
491 if (Value) Byte |= 0x80;
492 O << "0x" << std::hex << Byte << std::dec;
493 if (Value) O << ", ";
497 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
498 /// representing a signed leb128 value.
499 void AsmPrinter::PrintSLEB128(int Value) const {
500 int Sign = Value >> (8 * sizeof(Value) - 1);
504 unsigned Byte = Value & 0x7f;
506 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
507 if (IsMore) Byte |= 0x80;
508 O << "0x" << std::hex << Byte << std::dec;
509 if (IsMore) O << ", ";
513 //===--------------------------------------------------------------------===//
514 // Emission and print routines
517 /// PrintHex - Print a value as a hexidecimal value.
519 void AsmPrinter::PrintHex(int Value) const {
520 O << "0x" << std::hex << Value << std::dec;
523 /// EOL - Print a newline character to asm stream. If a comment is present
524 /// then it will be printed first. Comments should not contain '\n'.
525 void AsmPrinter::EOL() const {
529 void AsmPrinter::EOL(const std::string &Comment) const {
530 if (VerboseAsm && !Comment.empty()) {
532 << TAI->getCommentString()
539 void AsmPrinter::EOL(const char* Comment) const {
540 if (VerboseAsm && *Comment) {
542 << TAI->getCommentString()
549 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
550 /// unsigned leb128 value.
551 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
552 if (TAI->hasLEB128()) {
556 O << TAI->getData8bitsDirective();
561 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
562 /// signed leb128 value.
563 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
564 if (TAI->hasLEB128()) {
568 O << TAI->getData8bitsDirective();
573 /// EmitInt8 - Emit a byte directive and value.
575 void AsmPrinter::EmitInt8(int Value) const {
576 O << TAI->getData8bitsDirective();
577 PrintHex(Value & 0xFF);
580 /// EmitInt16 - Emit a short directive and value.
582 void AsmPrinter::EmitInt16(int Value) const {
583 O << TAI->getData16bitsDirective();
584 PrintHex(Value & 0xFFFF);
587 /// EmitInt32 - Emit a long directive and value.
589 void AsmPrinter::EmitInt32(int Value) const {
590 O << TAI->getData32bitsDirective();
594 /// EmitInt64 - Emit a long long directive and value.
596 void AsmPrinter::EmitInt64(uint64_t Value) const {
597 if (TAI->getData64bitsDirective()) {
598 O << TAI->getData64bitsDirective();
601 if (TM.getTargetData()->isBigEndian()) {
602 EmitInt32(unsigned(Value >> 32)); O << '\n';
603 EmitInt32(unsigned(Value));
605 EmitInt32(unsigned(Value)); O << '\n';
606 EmitInt32(unsigned(Value >> 32));
611 /// toOctal - Convert the low order bits of X into an octal digit.
613 static inline char toOctal(int X) {
617 /// printStringChar - Print a char, escaped if necessary.
619 static void printStringChar(std::ostream &O, unsigned char C) {
622 } else if (C == '\\') {
624 } else if (isprint(C)) {
628 case '\b': O << "\\b"; break;
629 case '\f': O << "\\f"; break;
630 case '\n': O << "\\n"; break;
631 case '\r': O << "\\r"; break;
632 case '\t': O << "\\t"; break;
635 O << toOctal(C >> 6);
636 O << toOctal(C >> 3);
637 O << toOctal(C >> 0);
643 /// EmitString - Emit a string with quotes and a null terminator.
644 /// Special characters are emitted properly.
645 /// \literal (Eg. '\t') \endliteral
646 void AsmPrinter::EmitString(const std::string &String) const {
647 const char* AscizDirective = TAI->getAscizDirective();
651 O << TAI->getAsciiDirective();
653 for (unsigned i = 0, N = String.size(); i < N; ++i) {
654 unsigned char C = String[i];
655 printStringChar(O, C);
664 /// EmitFile - Emit a .file directive.
665 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
666 O << "\t.file\t" << Number << " \"";
667 for (unsigned i = 0, N = Name.size(); i < N; ++i) {
668 unsigned char C = Name[i];
669 printStringChar(O, C);
675 //===----------------------------------------------------------------------===//
677 // EmitAlignment - Emit an alignment directive to the specified power of
678 // two boundary. For example, if you pass in 3 here, you will get an 8
679 // byte alignment. If a global value is specified, and if that global has
680 // an explicit alignment requested, it will unconditionally override the
681 // alignment request. However, if ForcedAlignBits is specified, this value
682 // has final say: the ultimate alignment will be the max of ForcedAlignBits
683 // and the alignment computed with NumBits and the global.
687 // if (GV && GV->hasalignment) Align = GV->getalignment();
688 // Align = std::max(Align, ForcedAlignBits);
690 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
691 unsigned ForcedAlignBits,
692 bool UseFillExpr) const {
693 if (GV && GV->getAlignment())
694 NumBits = Log2_32(GV->getAlignment());
695 NumBits = std::max(NumBits, ForcedAlignBits);
697 if (NumBits == 0) return; // No need to emit alignment.
698 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
699 O << TAI->getAlignDirective() << NumBits;
701 unsigned FillValue = TAI->getTextAlignFillValue();
702 UseFillExpr &= IsInTextSection && FillValue;
703 if (UseFillExpr) O << ",0x" << std::hex << FillValue << std::dec;
708 /// EmitZeros - Emit a block of zeros.
710 void AsmPrinter::EmitZeros(uint64_t NumZeros) const {
712 if (TAI->getZeroDirective()) {
713 O << TAI->getZeroDirective() << NumZeros;
714 if (TAI->getZeroDirectiveSuffix())
715 O << TAI->getZeroDirectiveSuffix();
718 for (; NumZeros; --NumZeros)
719 O << TAI->getData8bitsDirective() << "0\n";
724 // Print out the specified constant, without a storage class. Only the
725 // constants valid in constant expressions can occur here.
726 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
727 if (CV->isNullValue() || isa<UndefValue>(CV))
729 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
730 O << CI->getZExtValue();
731 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
732 // This is a constant address for a global variable or function. Use the
733 // name of the variable or function as the address value, possibly
734 // decorating it with GlobalVarAddrPrefix/Suffix or
735 // FunctionAddrPrefix/Suffix (these all default to "" )
736 if (isa<Function>(GV)) {
737 O << TAI->getFunctionAddrPrefix()
738 << Mang->getValueName(GV)
739 << TAI->getFunctionAddrSuffix();
741 O << TAI->getGlobalVarAddrPrefix()
742 << Mang->getValueName(GV)
743 << TAI->getGlobalVarAddrSuffix();
745 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
746 const TargetData *TD = TM.getTargetData();
747 unsigned Opcode = CE->getOpcode();
749 case Instruction::GetElementPtr: {
750 // generate a symbolic expression for the byte address
751 const Constant *ptrVal = CE->getOperand(0);
752 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
753 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
757 EmitConstantValueOnly(ptrVal);
759 O << ") + " << Offset;
761 O << ") - " << -Offset;
763 EmitConstantValueOnly(ptrVal);
767 case Instruction::Trunc:
768 case Instruction::ZExt:
769 case Instruction::SExt:
770 case Instruction::FPTrunc:
771 case Instruction::FPExt:
772 case Instruction::UIToFP:
773 case Instruction::SIToFP:
774 case Instruction::FPToUI:
775 case Instruction::FPToSI:
776 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
778 case Instruction::BitCast:
779 return EmitConstantValueOnly(CE->getOperand(0));
781 case Instruction::IntToPtr: {
782 // Handle casts to pointers by changing them into casts to the appropriate
783 // integer type. This promotes constant folding and simplifies this code.
784 Constant *Op = CE->getOperand(0);
785 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
786 return EmitConstantValueOnly(Op);
790 case Instruction::PtrToInt: {
791 // Support only foldable casts to/from pointers that can be eliminated by
792 // changing the pointer to the appropriately sized integer type.
793 Constant *Op = CE->getOperand(0);
794 const Type *Ty = CE->getType();
796 // We can emit the pointer value into this slot if the slot is an
797 // integer slot greater or equal to the size of the pointer.
798 if (TD->getABITypeSize(Ty) >= TD->getABITypeSize(Op->getType()))
799 return EmitConstantValueOnly(Op);
802 EmitConstantValueOnly(Op);
803 APInt ptrMask = APInt::getAllOnesValue(TD->getABITypeSizeInBits(Ty));
806 ptrMask.toStringUnsigned(S);
807 O << ") & " << S.c_str() << ')';
810 case Instruction::Add:
811 case Instruction::Sub:
812 case Instruction::And:
813 case Instruction::Or:
814 case Instruction::Xor:
816 EmitConstantValueOnly(CE->getOperand(0));
819 case Instruction::Add:
822 case Instruction::Sub:
825 case Instruction::And:
828 case Instruction::Or:
831 case Instruction::Xor:
838 EmitConstantValueOnly(CE->getOperand(1));
842 assert(0 && "Unsupported operator!");
845 assert(0 && "Unknown constant value!");
849 /// printAsCString - Print the specified array as a C compatible string, only if
850 /// the predicate isString is true.
852 static void printAsCString(std::ostream &O, const ConstantArray *CVA,
854 assert(CVA->isString() && "Array is not string compatible!");
857 for (unsigned i = 0; i != LastElt; ++i) {
859 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
860 printStringChar(O, C);
865 /// EmitString - Emit a zero-byte-terminated string constant.
867 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
868 unsigned NumElts = CVA->getNumOperands();
869 if (TAI->getAscizDirective() && NumElts &&
870 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
871 O << TAI->getAscizDirective();
872 printAsCString(O, CVA, NumElts-1);
874 O << TAI->getAsciiDirective();
875 printAsCString(O, CVA, NumElts);
880 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
881 void AsmPrinter::EmitGlobalConstant(const Constant *CV) {
882 const TargetData *TD = TM.getTargetData();
883 unsigned Size = TD->getABITypeSize(CV->getType());
885 if (CV->isNullValue() || isa<UndefValue>(CV)) {
888 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
889 if (CVA->isString()) {
891 } else { // Not a string. Print the values in successive locations
892 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
893 EmitGlobalConstant(CVA->getOperand(i));
896 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
897 // Print the fields in successive locations. Pad to align if needed!
898 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
899 uint64_t sizeSoFar = 0;
900 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
901 const Constant* field = CVS->getOperand(i);
903 // Check if padding is needed and insert one or more 0s.
904 uint64_t fieldSize = TD->getABITypeSize(field->getType());
905 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
906 - cvsLayout->getElementOffset(i)) - fieldSize;
907 sizeSoFar += fieldSize + padSize;
909 // Now print the actual field value.
910 EmitGlobalConstant(field);
912 // Insert padding - this may include padding to increase the size of the
913 // current field up to the ABI size (if the struct is not packed) as well
914 // as padding to ensure that the next field starts at the right offset.
917 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
918 "Layout of constant struct may be incorrect!");
920 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
921 // FP Constants are printed as integer constants to avoid losing
923 if (CFP->getType() == Type::DoubleTy) {
924 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
925 uint64_t i = CFP->getValueAPF().convertToAPInt().getZExtValue();
926 if (TAI->getData64bitsDirective())
927 O << TAI->getData64bitsDirective() << i << '\t'
928 << TAI->getCommentString() << " double value: " << Val << '\n';
929 else if (TD->isBigEndian()) {
930 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
931 << '\t' << TAI->getCommentString()
932 << " double most significant word " << Val << '\n';
933 O << TAI->getData32bitsDirective() << unsigned(i)
934 << '\t' << TAI->getCommentString()
935 << " double least significant word " << Val << '\n';
937 O << TAI->getData32bitsDirective() << unsigned(i)
938 << '\t' << TAI->getCommentString()
939 << " double least significant word " << Val << '\n';
940 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
941 << '\t' << TAI->getCommentString()
942 << " double most significant word " << Val << '\n';
945 } else if (CFP->getType() == Type::FloatTy) {
946 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
947 O << TAI->getData32bitsDirective()
948 << CFP->getValueAPF().convertToAPInt().getZExtValue()
949 << '\t' << TAI->getCommentString() << " float " << Val << '\n';
951 } else if (CFP->getType() == Type::X86_FP80Ty) {
952 // all long double variants are printed as hex
953 // api needed to prevent premature destruction
954 APInt api = CFP->getValueAPF().convertToAPInt();
955 const uint64_t *p = api.getRawData();
956 APFloat DoubleVal = CFP->getValueAPF();
957 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven);
958 if (TD->isBigEndian()) {
959 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
960 << '\t' << TAI->getCommentString()
961 << " long double most significant halfword of ~"
962 << DoubleVal.convertToDouble() << '\n';
963 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
964 << '\t' << TAI->getCommentString()
965 << " long double next halfword\n";
966 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
967 << '\t' << TAI->getCommentString()
968 << " long double next halfword\n";
969 O << TAI->getData16bitsDirective() << uint16_t(p[0])
970 << '\t' << TAI->getCommentString()
971 << " long double next halfword\n";
972 O << TAI->getData16bitsDirective() << uint16_t(p[1])
973 << '\t' << TAI->getCommentString()
974 << " long double least significant halfword\n";
976 O << TAI->getData16bitsDirective() << uint16_t(p[1])
977 << '\t' << TAI->getCommentString()
978 << " long double least significant halfword of ~"
979 << DoubleVal.convertToDouble() << '\n';
980 O << TAI->getData16bitsDirective() << uint16_t(p[0])
981 << '\t' << TAI->getCommentString()
982 << " long double next halfword\n";
983 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
984 << '\t' << TAI->getCommentString()
985 << " long double next halfword\n";
986 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
987 << '\t' << TAI->getCommentString()
988 << " long double next halfword\n";
989 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
990 << '\t' << TAI->getCommentString()
991 << " long double most significant halfword\n";
993 EmitZeros(Size - TD->getTypeStoreSize(Type::X86_FP80Ty));
995 } else if (CFP->getType() == Type::PPC_FP128Ty) {
996 // all long double variants are printed as hex
997 // api needed to prevent premature destruction
998 APInt api = CFP->getValueAPF().convertToAPInt();
999 const uint64_t *p = api.getRawData();
1000 if (TD->isBigEndian()) {
1001 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1002 << '\t' << TAI->getCommentString()
1003 << " long double most significant word\n";
1004 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1005 << '\t' << TAI->getCommentString()
1006 << " long double next word\n";
1007 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1008 << '\t' << TAI->getCommentString()
1009 << " long double next word\n";
1010 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1011 << '\t' << TAI->getCommentString()
1012 << " long double least significant word\n";
1014 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1015 << '\t' << TAI->getCommentString()
1016 << " long double least significant word\n";
1017 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1018 << '\t' << TAI->getCommentString()
1019 << " long double next word\n";
1020 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1021 << '\t' << TAI->getCommentString()
1022 << " long double next word\n";
1023 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1024 << '\t' << TAI->getCommentString()
1025 << " long double most significant word\n";
1028 } else assert(0 && "Floating point constant type not handled");
1029 } else if (CV->getType() == Type::Int64Ty) {
1030 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1031 uint64_t Val = CI->getZExtValue();
1033 if (TAI->getData64bitsDirective())
1034 O << TAI->getData64bitsDirective() << Val << '\n';
1035 else if (TD->isBigEndian()) {
1036 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1037 << '\t' << TAI->getCommentString()
1038 << " Double-word most significant word " << Val << '\n';
1039 O << TAI->getData32bitsDirective() << unsigned(Val)
1040 << '\t' << TAI->getCommentString()
1041 << " Double-word least significant word " << Val << '\n';
1043 O << TAI->getData32bitsDirective() << unsigned(Val)
1044 << '\t' << TAI->getCommentString()
1045 << " Double-word least significant word " << Val << '\n';
1046 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1047 << '\t' << TAI->getCommentString()
1048 << " Double-word most significant word " << Val << '\n';
1052 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1053 const VectorType *PTy = CP->getType();
1055 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
1056 EmitGlobalConstant(CP->getOperand(I));
1061 const Type *type = CV->getType();
1062 printDataDirective(type);
1063 EmitConstantValueOnly(CV);
1064 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1066 CI->getValue().toStringUnsigned(S, 16);
1067 O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
1072 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1073 // Target doesn't support this yet!
1077 /// PrintSpecial - Print information related to the specified machine instr
1078 /// that is independent of the operand, and may be independent of the instr
1079 /// itself. This can be useful for portably encoding the comment character
1080 /// or other bits of target-specific knowledge into the asmstrings. The
1081 /// syntax used is ${:comment}. Targets can override this to add support
1082 /// for their own strange codes.
1083 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) {
1084 if (!strcmp(Code, "private")) {
1085 O << TAI->getPrivateGlobalPrefix();
1086 } else if (!strcmp(Code, "comment")) {
1087 O << TAI->getCommentString();
1088 } else if (!strcmp(Code, "uid")) {
1089 // Assign a unique ID to this machine instruction.
1090 static const MachineInstr *LastMI = 0;
1091 static const Function *F = 0;
1092 static unsigned Counter = 0U-1;
1094 // Comparing the address of MI isn't sufficient, because machineinstrs may
1095 // be allocated to the same address across functions.
1096 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1098 // If this is a new machine instruction, bump the counter.
1099 if (LastMI != MI || F != ThisF) {
1106 cerr << "Unknown special formatter '" << Code
1107 << "' for machine instr: " << *MI;
1113 /// printInlineAsm - This method formats and prints the specified machine
1114 /// instruction that is an inline asm.
1115 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1116 unsigned NumOperands = MI->getNumOperands();
1118 // Count the number of register definitions.
1119 unsigned NumDefs = 0;
1120 for (; MI->getOperand(NumDefs).isRegister() && MI->getOperand(NumDefs).isDef();
1122 assert(NumDefs != NumOperands-1 && "No asm string?");
1124 assert(MI->getOperand(NumDefs).isExternalSymbol() && "No asm string?");
1126 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1127 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1129 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1130 // These are useful to see where empty asm's wound up.
1131 if (AsmStr[0] == 0) {
1132 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1136 O << TAI->getInlineAsmStart() << "\n\t";
1138 // The variant of the current asmprinter.
1139 int AsmPrinterVariant = TAI->getAssemblerDialect();
1141 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1142 const char *LastEmitted = AsmStr; // One past the last character emitted.
1144 while (*LastEmitted) {
1145 switch (*LastEmitted) {
1147 // Not a special case, emit the string section literally.
1148 const char *LiteralEnd = LastEmitted+1;
1149 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1150 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1152 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1153 O.write(LastEmitted, LiteralEnd-LastEmitted);
1154 LastEmitted = LiteralEnd;
1158 ++LastEmitted; // Consume newline character.
1159 O << '\n'; // Indent code with newline.
1162 ++LastEmitted; // Consume '$' character.
1166 switch (*LastEmitted) {
1167 default: Done = false; break;
1168 case '$': // $$ -> $
1169 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1171 ++LastEmitted; // Consume second '$' character.
1173 case '(': // $( -> same as GCC's { character.
1174 ++LastEmitted; // Consume '(' character.
1175 if (CurVariant != -1) {
1176 cerr << "Nested variants found in inline asm string: '"
1180 CurVariant = 0; // We're in the first variant now.
1183 ++LastEmitted; // consume '|' character.
1184 if (CurVariant == -1) {
1185 cerr << "Found '|' character outside of variant in inline asm "
1186 << "string: '" << AsmStr << "'\n";
1189 ++CurVariant; // We're in the next variant.
1191 case ')': // $) -> same as GCC's } char.
1192 ++LastEmitted; // consume ')' character.
1193 if (CurVariant == -1) {
1194 cerr << "Found '}' character outside of variant in inline asm "
1195 << "string: '" << AsmStr << "'\n";
1203 bool HasCurlyBraces = false;
1204 if (*LastEmitted == '{') { // ${variable}
1205 ++LastEmitted; // Consume '{' character.
1206 HasCurlyBraces = true;
1209 const char *IDStart = LastEmitted;
1212 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1213 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1214 cerr << "Bad $ operand number in inline asm string: '"
1218 LastEmitted = IDEnd;
1220 char Modifier[2] = { 0, 0 };
1222 if (HasCurlyBraces) {
1223 // If we have curly braces, check for a modifier character. This
1224 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1225 if (*LastEmitted == ':') {
1226 ++LastEmitted; // Consume ':' character.
1227 if (*LastEmitted == 0) {
1228 cerr << "Bad ${:} expression in inline asm string: '"
1233 Modifier[0] = *LastEmitted;
1234 ++LastEmitted; // Consume modifier character.
1237 if (*LastEmitted != '}') {
1238 cerr << "Bad ${} expression in inline asm string: '"
1242 ++LastEmitted; // Consume '}' character.
1245 if ((unsigned)Val >= NumOperands-1) {
1246 cerr << "Invalid $ operand number in inline asm string: '"
1251 // Okay, we finally have a value number. Ask the target to print this
1253 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1258 // Scan to find the machine operand number for the operand.
1259 for (; Val; --Val) {
1260 if (OpNo >= MI->getNumOperands()) break;
1261 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1262 OpNo += (OpFlags >> 3) + 1;
1265 if (OpNo >= MI->getNumOperands()) {
1268 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1269 ++OpNo; // Skip over the ID number.
1271 if (Modifier[0]=='l') // labels are target independent
1272 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1273 false, false, false);
1275 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1276 if ((OpFlags & 7) == 4 /*ADDR MODE*/) {
1277 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1278 Modifier[0] ? Modifier : 0);
1280 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1281 Modifier[0] ? Modifier : 0);
1286 cerr << "Invalid operand found in inline asm: '"
1296 O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1299 /// printImplicitDef - This method prints the specified machine instruction
1300 /// that is an implicit def.
1301 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1302 O << '\t' << TAI->getCommentString() << " implicit-def: "
1303 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1306 /// printLabel - This method prints a local label used by debug and
1307 /// exception handling tables.
1308 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1309 printLabel(MI->getOperand(0).getImm());
1312 void AsmPrinter::printLabel(unsigned Id) const {
1313 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1316 /// printDeclare - This method prints a local variable declaration used by
1318 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1319 /// entry into dwarf table.
1320 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1321 int FI = MI->getOperand(0).getIndex();
1322 GlobalValue *GV = MI->getOperand(1).getGlobal();
1323 MMI->RecordVariable(GV, FI);
1326 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1327 /// instruction, using the specified assembler variant. Targets should
1328 /// overried this to format as appropriate.
1329 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1330 unsigned AsmVariant, const char *ExtraCode) {
1331 // Target doesn't support this yet!
1335 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1336 unsigned AsmVariant,
1337 const char *ExtraCode) {
1338 // Target doesn't support this yet!
1342 /// printBasicBlockLabel - This method prints the label for the specified
1343 /// MachineBasicBlock
1344 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1347 bool printComment) const {
1349 unsigned Align = MBB->getAlignment();
1351 EmitAlignment(Log2_32(Align));
1354 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1355 << MBB->getNumber();
1358 if (printComment && MBB->getBasicBlock())
1359 O << '\t' << TAI->getCommentString() << ' '
1360 << MBB->getBasicBlock()->getNameStart();
1363 /// printPICJumpTableSetLabel - This method prints a set label for the
1364 /// specified MachineBasicBlock for a jumptable entry.
1365 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1366 const MachineBasicBlock *MBB) const {
1367 if (!TAI->getSetDirective())
1370 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1371 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1372 printBasicBlockLabel(MBB, false, false, false);
1373 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1374 << '_' << uid << '\n';
1377 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1378 const MachineBasicBlock *MBB) const {
1379 if (!TAI->getSetDirective())
1382 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1383 << getFunctionNumber() << '_' << uid << '_' << uid2
1384 << "_set_" << MBB->getNumber() << ',';
1385 printBasicBlockLabel(MBB, false, false, false);
1386 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1387 << '_' << uid << '_' << uid2 << '\n';
1390 /// printDataDirective - This method prints the asm directive for the
1392 void AsmPrinter::printDataDirective(const Type *type) {
1393 const TargetData *TD = TM.getTargetData();
1394 switch (type->getTypeID()) {
1395 case Type::IntegerTyID: {
1396 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1398 O << TAI->getData8bitsDirective();
1399 else if (BitWidth <= 16)
1400 O << TAI->getData16bitsDirective();
1401 else if (BitWidth <= 32)
1402 O << TAI->getData32bitsDirective();
1403 else if (BitWidth <= 64) {
1404 assert(TAI->getData64bitsDirective() &&
1405 "Target cannot handle 64-bit constant exprs!");
1406 O << TAI->getData64bitsDirective();
1410 case Type::PointerTyID:
1411 if (TD->getPointerSize() == 8) {
1412 assert(TAI->getData64bitsDirective() &&
1413 "Target cannot handle 64-bit pointer exprs!");
1414 O << TAI->getData64bitsDirective();
1416 O << TAI->getData32bitsDirective();
1419 case Type::FloatTyID: case Type::DoubleTyID:
1420 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1421 assert (0 && "Should have already output floating point constant.");
1423 assert (0 && "Can't handle printing this type of thing");
1428 void AsmPrinter::printSuffixedName(const char *Name, const char *Suffix,
1429 const char *Prefix) {
1432 O << TAI->getPrivateGlobalPrefix();
1433 if (Prefix) O << Prefix;
1445 void AsmPrinter::printSuffixedName(const std::string &Name, const char* Suffix) {
1446 printSuffixedName(Name.c_str(), Suffix);
1449 void AsmPrinter::printVisibility(const std::string& Name,
1450 unsigned Visibility) const {
1451 if (Visibility == GlobalValue::HiddenVisibility) {
1452 if (const char *Directive = TAI->getHiddenDirective())
1453 O << Directive << Name << '\n';
1454 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1455 if (const char *Directive = TAI->getProtectedDirective())
1456 O << Directive << Name << '\n';