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/CommandLine.h"
25 #include "llvm/Support/Mangler.h"
26 #include "llvm/Support/MathExtras.h"
27 #include "llvm/Support/Streams.h"
28 #include "llvm/Target/TargetAsmInfo.h"
29 #include "llvm/Target/TargetData.h"
30 #include "llvm/Target/TargetLowering.h"
31 #include "llvm/Target/TargetMachine.h"
32 #include "llvm/Target/TargetRegisterInfo.h"
33 #include "llvm/ADT/SmallPtrSet.h"
38 AsmVerbose("asm-verbose", cl::Hidden, cl::desc("Add comments to directives."));
40 char AsmPrinter::ID = 0;
41 AsmPrinter::AsmPrinter(std::ostream &o, TargetMachine &tm,
42 const TargetAsmInfo *T)
43 : MachineFunctionPass((intptr_t)&ID), FunctionNumber(0), O(o),
44 TM(tm), TAI(T), TRI(tm.getRegisterInfo()),
45 IsInTextSection(false)
48 std::string AsmPrinter::getSectionForFunction(const Function &F) const {
49 return TAI->getTextSection();
53 /// SwitchToTextSection - Switch to the specified text section of the executable
54 /// if we are not already in it!
56 void AsmPrinter::SwitchToTextSection(const char *NewSection,
57 const GlobalValue *GV) {
59 if (GV && GV->hasSection())
60 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
64 // If we're already in this section, we're done.
65 if (CurrentSection == NS) return;
67 // Close the current section, if applicable.
68 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
69 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << "\n";
73 if (!CurrentSection.empty())
74 O << CurrentSection << TAI->getTextSectionStartSuffix() << '\n';
76 IsInTextSection = true;
79 /// SwitchToDataSection - Switch to the specified data section of the executable
80 /// if we are not already in it!
82 void AsmPrinter::SwitchToDataSection(const char *NewSection,
83 const GlobalValue *GV) {
85 if (GV && GV->hasSection())
86 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
90 // If we're already in this section, we're done.
91 if (CurrentSection == NS) return;
93 // Close the current section, if applicable.
94 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
95 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << "\n";
99 if (!CurrentSection.empty())
100 O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
102 IsInTextSection = false;
106 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
107 MachineFunctionPass::getAnalysisUsage(AU);
108 AU.addRequired<CollectorModuleMetadata>();
111 bool AsmPrinter::doInitialization(Module &M) {
112 Mang = new Mangler(M, TAI->getGlobalPrefix());
114 CollectorModuleMetadata *CMM = getAnalysisToUpdate<CollectorModuleMetadata>();
115 assert(CMM && "AsmPrinter didn't require CollectorModuleMetadata?");
116 for (CollectorModuleMetadata::iterator I = CMM->begin(),
117 E = CMM->end(); I != E; ++I)
118 (*I)->beginAssembly(O, *this, *TAI);
120 if (!M.getModuleInlineAsm().empty())
121 O << TAI->getCommentString() << " Start of file scope inline assembly\n"
122 << M.getModuleInlineAsm()
123 << "\n" << TAI->getCommentString()
124 << " End of file scope inline assembly\n";
126 SwitchToDataSection(""); // Reset back to no section.
128 MMI = getAnalysisToUpdate<MachineModuleInfo>();
129 if (MMI) MMI->AnalyzeModule(M);
134 bool AsmPrinter::doFinalization(Module &M) {
135 if (TAI->getWeakRefDirective()) {
136 if (!ExtWeakSymbols.empty())
137 SwitchToDataSection("");
139 for (std::set<const GlobalValue*>::iterator i = ExtWeakSymbols.begin(),
140 e = ExtWeakSymbols.end(); i != e; ++i) {
141 const GlobalValue *GV = *i;
142 std::string Name = Mang->getValueName(GV);
143 O << TAI->getWeakRefDirective() << Name << "\n";
147 if (TAI->getSetDirective()) {
148 if (!M.alias_empty())
149 SwitchToTextSection(TAI->getTextSection());
152 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
154 std::string Name = Mang->getValueName(I);
157 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
158 Target = Mang->getValueName(GV);
160 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
161 O << "\t.globl\t" << Name << "\n";
162 else if (I->hasWeakLinkage())
163 O << TAI->getWeakRefDirective() << Name << "\n";
164 else if (!I->hasInternalLinkage())
165 assert(0 && "Invalid alias linkage");
167 if (I->hasHiddenVisibility()) {
168 if (const char *Directive = TAI->getHiddenDirective())
169 O << Directive << Name << "\n";
170 } else if (I->hasProtectedVisibility()) {
171 if (const char *Directive = TAI->getProtectedDirective())
172 O << Directive << Name << "\n";
175 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << "\n";
177 // If the aliasee has external weak linkage it can be referenced only by
178 // alias itself. In this case it can be not in ExtWeakSymbols list. Emit
179 // weak reference in such case.
180 if (GV->hasExternalWeakLinkage()) {
181 if (TAI->getWeakRefDirective())
182 O << TAI->getWeakRefDirective() << Target << "\n";
184 O << "\t.globl\t" << Target << "\n";
189 CollectorModuleMetadata *CMM = getAnalysisToUpdate<CollectorModuleMetadata>();
190 assert(CMM && "AsmPrinter didn't require CollectorModuleMetadata?");
191 for (CollectorModuleMetadata::iterator I = CMM->end(),
192 E = CMM->begin(); I != E; )
193 (*--I)->finishAssembly(O, *this, *TAI);
195 // If we don't have any trampolines, then we don't require stack memory
196 // to be executable. Some targets have a directive to declare this.
197 Function* InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
198 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
199 if (TAI->getNonexecutableStackDirective())
200 O << TAI->getNonexecutableStackDirective() << "\n";
202 delete Mang; Mang = 0;
206 std::string AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) {
207 assert(MF && "No machine function?");
208 std::string Name = MF->getFunction()->getName();
210 Name = Mang->getValueName(MF->getFunction());
211 return Mang->makeNameProper(Name + ".eh", TAI->getGlobalPrefix());
214 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
215 // What's my mangled name?
216 CurrentFnName = Mang->getValueName(MF.getFunction());
217 IncrementFunctionNumber();
220 /// EmitConstantPool - Print to the current output stream assembly
221 /// representations of the constants in the constant pool MCP. This is
222 /// used to print out constants which have been "spilled to memory" by
223 /// the code generator.
225 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
226 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
227 if (CP.empty()) return;
229 // Some targets require 4-, 8-, and 16- byte constant literals to be placed
230 // in special sections.
231 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > FourByteCPs;
232 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > EightByteCPs;
233 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > SixteenByteCPs;
234 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > OtherCPs;
235 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > TargetCPs;
236 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
237 MachineConstantPoolEntry CPE = CP[i];
238 const Type *Ty = CPE.getType();
239 if (TAI->getFourByteConstantSection() &&
240 TM.getTargetData()->getABITypeSize(Ty) == 4)
241 FourByteCPs.push_back(std::make_pair(CPE, i));
242 else if (TAI->getEightByteConstantSection() &&
243 TM.getTargetData()->getABITypeSize(Ty) == 8)
244 EightByteCPs.push_back(std::make_pair(CPE, i));
245 else if (TAI->getSixteenByteConstantSection() &&
246 TM.getTargetData()->getABITypeSize(Ty) == 16)
247 SixteenByteCPs.push_back(std::make_pair(CPE, i));
249 OtherCPs.push_back(std::make_pair(CPE, i));
252 unsigned Alignment = MCP->getConstantPoolAlignment();
253 EmitConstantPool(Alignment, TAI->getFourByteConstantSection(), FourByteCPs);
254 EmitConstantPool(Alignment, TAI->getEightByteConstantSection(), EightByteCPs);
255 EmitConstantPool(Alignment, TAI->getSixteenByteConstantSection(),
257 EmitConstantPool(Alignment, TAI->getConstantPoolSection(), OtherCPs);
260 void AsmPrinter::EmitConstantPool(unsigned Alignment, const char *Section,
261 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > &CP) {
262 if (CP.empty()) return;
264 SwitchToDataSection(Section);
265 EmitAlignment(Alignment);
266 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
267 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
268 << CP[i].second << ":\t\t\t\t\t" << TAI->getCommentString() << " ";
269 WriteTypeSymbolic(O, CP[i].first.getType(), 0) << '\n';
270 if (CP[i].first.isMachineConstantPoolEntry())
271 EmitMachineConstantPoolValue(CP[i].first.Val.MachineCPVal);
273 EmitGlobalConstant(CP[i].first.Val.ConstVal);
275 const Type *Ty = CP[i].first.getType();
277 TM.getTargetData()->getABITypeSize(Ty);
278 unsigned ValEnd = CP[i].first.getOffset() + EntSize;
279 // Emit inter-object padding for alignment.
280 EmitZeros(CP[i+1].first.getOffset()-ValEnd);
285 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
286 /// by the current function to the current output stream.
288 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
289 MachineFunction &MF) {
290 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
291 if (JT.empty()) return;
293 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
295 // Pick the directive to use to print the jump table entries, and switch to
296 // the appropriate section.
297 TargetLowering *LoweringInfo = TM.getTargetLowering();
299 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
300 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
301 !JumpTableDataSection) {
302 // In PIC mode, we need to emit the jump table to the same section as the
303 // function body itself, otherwise the label differences won't make sense.
304 // We should also do if the section name is NULL.
305 const Function *F = MF.getFunction();
306 SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
308 SwitchToDataSection(JumpTableDataSection);
311 EmitAlignment(Log2_32(MJTI->getAlignment()));
313 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
314 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
316 // If this jump table was deleted, ignore it.
317 if (JTBBs.empty()) continue;
319 // For PIC codegen, if possible we want to use the SetDirective to reduce
320 // the number of relocations the assembler will generate for the jump table.
321 // Set directives are all printed before the jump table itself.
322 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
323 if (TAI->getSetDirective() && IsPic)
324 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
325 if (EmittedSets.insert(JTBBs[ii]))
326 printPICJumpTableSetLabel(i, JTBBs[ii]);
328 // On some targets (e.g. darwin) we want to emit two consequtive labels
329 // before each jump table. The first label is never referenced, but tells
330 // the assembler and linker the extents of the jump table object. The
331 // second label is actually referenced by the code.
332 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
333 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
335 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
336 << '_' << i << ":\n";
338 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
339 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
345 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
346 const MachineBasicBlock *MBB,
347 unsigned uid) const {
348 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
350 // Use JumpTableDirective otherwise honor the entry size from the jump table
352 const char *JTEntryDirective = TAI->getJumpTableDirective();
353 bool HadJTEntryDirective = JTEntryDirective != NULL;
354 if (!HadJTEntryDirective) {
355 JTEntryDirective = MJTI->getEntrySize() == 4 ?
356 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
359 O << JTEntryDirective << ' ';
361 // If we have emitted set directives for the jump table entries, print
362 // them rather than the entries themselves. If we're emitting PIC, then
363 // emit the table entries as differences between two text section labels.
364 // If we're emitting non-PIC code, then emit the entries as direct
365 // references to the target basic blocks.
367 if (TAI->getSetDirective()) {
368 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
369 << '_' << uid << "_set_" << MBB->getNumber();
371 printBasicBlockLabel(MBB, false, false, false);
372 // If the arch uses custom Jump Table directives, don't calc relative to
374 if (!HadJTEntryDirective)
375 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
376 << getFunctionNumber() << '_' << uid;
379 printBasicBlockLabel(MBB, false, false, false);
384 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
385 /// special global used by LLVM. If so, emit it and return true, otherwise
386 /// do nothing and return false.
387 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
388 if (GV->getName() == "llvm.used") {
389 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
390 EmitLLVMUsedList(GV->getInitializer());
394 // Ignore debug and non-emitted data.
395 if (GV->getSection() == "llvm.metadata") return true;
397 if (!GV->hasAppendingLinkage()) return false;
399 assert(GV->hasInitializer() && "Not a special LLVM global!");
401 const TargetData *TD = TM.getTargetData();
402 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
403 if (GV->getName() == "llvm.global_ctors" && GV->use_empty()) {
404 SwitchToDataSection(TAI->getStaticCtorsSection());
405 EmitAlignment(Align, 0);
406 EmitXXStructorList(GV->getInitializer());
410 if (GV->getName() == "llvm.global_dtors" && GV->use_empty()) {
411 SwitchToDataSection(TAI->getStaticDtorsSection());
412 EmitAlignment(Align, 0);
413 EmitXXStructorList(GV->getInitializer());
420 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
421 /// global in the specified llvm.used list as being used with this directive.
422 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
423 const char *Directive = TAI->getUsedDirective();
425 // Should be an array of 'sbyte*'.
426 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
427 if (InitList == 0) return;
429 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
431 EmitConstantValueOnly(InitList->getOperand(i));
436 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
437 /// function pointers, ignoring the init priority.
438 void AsmPrinter::EmitXXStructorList(Constant *List) {
439 // Should be an array of '{ int, void ()* }' structs. The first value is the
440 // init priority, which we ignore.
441 if (!isa<ConstantArray>(List)) return;
442 ConstantArray *InitList = cast<ConstantArray>(List);
443 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
444 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
445 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
447 if (CS->getOperand(1)->isNullValue())
448 return; // Found a null terminator, exit printing.
449 // Emit the function pointer.
450 EmitGlobalConstant(CS->getOperand(1));
454 /// getGlobalLinkName - Returns the asm/link name of of the specified
455 /// global variable. Should be overridden by each target asm printer to
456 /// generate the appropriate value.
457 const std::string AsmPrinter::getGlobalLinkName(const GlobalVariable *GV) const{
458 std::string LinkName;
460 if (isa<Function>(GV)) {
461 LinkName += TAI->getFunctionAddrPrefix();
462 LinkName += Mang->getValueName(GV);
463 LinkName += TAI->getFunctionAddrSuffix();
465 LinkName += TAI->getGlobalVarAddrPrefix();
466 LinkName += Mang->getValueName(GV);
467 LinkName += TAI->getGlobalVarAddrSuffix();
473 /// EmitExternalGlobal - Emit the external reference to a global variable.
474 /// Should be overridden if an indirect reference should be used.
475 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
476 O << getGlobalLinkName(GV);
481 //===----------------------------------------------------------------------===//
482 /// LEB 128 number encoding.
484 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
485 /// representing an unsigned leb128 value.
486 void AsmPrinter::PrintULEB128(unsigned Value) const {
488 unsigned Byte = Value & 0x7f;
490 if (Value) Byte |= 0x80;
491 O << "0x" << std::hex << Byte << std::dec;
492 if (Value) O << ", ";
496 /// SizeULEB128 - Compute the number of bytes required for an unsigned leb128
498 unsigned AsmPrinter::SizeULEB128(unsigned Value) {
502 Size += sizeof(int8_t);
507 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
508 /// representing a signed leb128 value.
509 void AsmPrinter::PrintSLEB128(int Value) const {
510 int Sign = Value >> (8 * sizeof(Value) - 1);
514 unsigned Byte = Value & 0x7f;
516 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
517 if (IsMore) Byte |= 0x80;
518 O << "0x" << std::hex << Byte << std::dec;
519 if (IsMore) O << ", ";
523 /// SizeSLEB128 - Compute the number of bytes required for a signed leb128
525 unsigned AsmPrinter::SizeSLEB128(int Value) {
527 int Sign = Value >> (8 * sizeof(Value) - 1);
531 unsigned Byte = Value & 0x7f;
533 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
534 Size += sizeof(int8_t);
539 //===--------------------------------------------------------------------===//
540 // Emission and print routines
543 /// PrintHex - Print a value as a hexidecimal value.
545 void AsmPrinter::PrintHex(int Value) const {
546 O << "0x" << std::hex << Value << std::dec;
549 /// EOL - Print a newline character to asm stream. If a comment is present
550 /// then it will be printed first. Comments should not contain '\n'.
551 void AsmPrinter::EOL() const {
554 void AsmPrinter::EOL(const std::string &Comment) const {
555 if (AsmVerbose && !Comment.empty()) {
557 << TAI->getCommentString()
564 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
565 /// unsigned leb128 value.
566 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
567 if (TAI->hasLEB128()) {
571 O << TAI->getData8bitsDirective();
576 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
577 /// signed leb128 value.
578 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
579 if (TAI->hasLEB128()) {
583 O << TAI->getData8bitsDirective();
588 /// EmitInt8 - Emit a byte directive and value.
590 void AsmPrinter::EmitInt8(int Value) const {
591 O << TAI->getData8bitsDirective();
592 PrintHex(Value & 0xFF);
595 /// EmitInt16 - Emit a short directive and value.
597 void AsmPrinter::EmitInt16(int Value) const {
598 O << TAI->getData16bitsDirective();
599 PrintHex(Value & 0xFFFF);
602 /// EmitInt32 - Emit a long directive and value.
604 void AsmPrinter::EmitInt32(int Value) const {
605 O << TAI->getData32bitsDirective();
609 /// EmitInt64 - Emit a long long directive and value.
611 void AsmPrinter::EmitInt64(uint64_t Value) const {
612 if (TAI->getData64bitsDirective()) {
613 O << TAI->getData64bitsDirective();
616 if (TM.getTargetData()->isBigEndian()) {
617 EmitInt32(unsigned(Value >> 32)); O << "\n";
618 EmitInt32(unsigned(Value));
620 EmitInt32(unsigned(Value)); O << "\n";
621 EmitInt32(unsigned(Value >> 32));
626 /// toOctal - Convert the low order bits of X into an octal digit.
628 static inline char toOctal(int X) {
632 /// printStringChar - Print a char, escaped if necessary.
634 static void printStringChar(std::ostream &O, unsigned char C) {
637 } else if (C == '\\') {
639 } else if (isprint(C)) {
643 case '\b': O << "\\b"; break;
644 case '\f': O << "\\f"; break;
645 case '\n': O << "\\n"; break;
646 case '\r': O << "\\r"; break;
647 case '\t': O << "\\t"; break;
650 O << toOctal(C >> 6);
651 O << toOctal(C >> 3);
652 O << toOctal(C >> 0);
658 /// EmitString - Emit a string with quotes and a null terminator.
659 /// Special characters are emitted properly.
660 /// \literal (Eg. '\t') \endliteral
661 void AsmPrinter::EmitString(const std::string &String) const {
662 const char* AscizDirective = TAI->getAscizDirective();
666 O << TAI->getAsciiDirective();
668 for (unsigned i = 0, N = String.size(); i < N; ++i) {
669 unsigned char C = String[i];
670 printStringChar(O, C);
679 /// EmitFile - Emit a .file directive.
680 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
681 O << "\t.file\t" << Number << " \"";
682 for (unsigned i = 0, N = Name.size(); i < N; ++i) {
683 unsigned char C = Name[i];
684 printStringChar(O, C);
690 //===----------------------------------------------------------------------===//
692 // EmitAlignment - Emit an alignment directive to the specified power of
693 // two boundary. For example, if you pass in 3 here, you will get an 8
694 // byte alignment. If a global value is specified, and if that global has
695 // an explicit alignment requested, it will unconditionally override the
696 // alignment request. However, if ForcedAlignBits is specified, this value
697 // has final say: the ultimate alignment will be the max of ForcedAlignBits
698 // and the alignment computed with NumBits and the global.
702 // if (GV && GV->hasalignment) Align = GV->getalignment();
703 // Align = std::max(Align, ForcedAlignBits);
705 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
706 unsigned ForcedAlignBits,
707 bool UseFillExpr) const {
708 if (GV && GV->getAlignment())
709 NumBits = Log2_32(GV->getAlignment());
710 NumBits = std::max(NumBits, ForcedAlignBits);
712 if (NumBits == 0) return; // No need to emit alignment.
713 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
714 O << TAI->getAlignDirective() << NumBits;
716 unsigned FillValue = TAI->getTextAlignFillValue();
717 UseFillExpr &= IsInTextSection && FillValue;
718 if (UseFillExpr) O << ",0x" << std::hex << FillValue << std::dec;
723 /// EmitZeros - Emit a block of zeros.
725 void AsmPrinter::EmitZeros(uint64_t NumZeros) const {
727 if (TAI->getZeroDirective()) {
728 O << TAI->getZeroDirective() << NumZeros;
729 if (TAI->getZeroDirectiveSuffix())
730 O << TAI->getZeroDirectiveSuffix();
733 for (; NumZeros; --NumZeros)
734 O << TAI->getData8bitsDirective() << "0\n";
739 // Print out the specified constant, without a storage class. Only the
740 // constants valid in constant expressions can occur here.
741 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
742 if (CV->isNullValue() || isa<UndefValue>(CV))
744 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
745 O << CI->getZExtValue();
746 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
747 // This is a constant address for a global variable or function. Use the
748 // name of the variable or function as the address value, possibly
749 // decorating it with GlobalVarAddrPrefix/Suffix or
750 // FunctionAddrPrefix/Suffix (these all default to "" )
751 if (isa<Function>(GV)) {
752 O << TAI->getFunctionAddrPrefix()
753 << Mang->getValueName(GV)
754 << TAI->getFunctionAddrSuffix();
756 O << TAI->getGlobalVarAddrPrefix()
757 << Mang->getValueName(GV)
758 << TAI->getGlobalVarAddrSuffix();
760 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
761 const TargetData *TD = TM.getTargetData();
762 unsigned Opcode = CE->getOpcode();
764 case Instruction::GetElementPtr: {
765 // generate a symbolic expression for the byte address
766 const Constant *ptrVal = CE->getOperand(0);
767 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
768 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
772 EmitConstantValueOnly(ptrVal);
774 O << ") + " << Offset;
776 O << ") - " << -Offset;
778 EmitConstantValueOnly(ptrVal);
782 case Instruction::Trunc:
783 case Instruction::ZExt:
784 case Instruction::SExt:
785 case Instruction::FPTrunc:
786 case Instruction::FPExt:
787 case Instruction::UIToFP:
788 case Instruction::SIToFP:
789 case Instruction::FPToUI:
790 case Instruction::FPToSI:
791 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
793 case Instruction::BitCast:
794 return EmitConstantValueOnly(CE->getOperand(0));
796 case Instruction::IntToPtr: {
797 // Handle casts to pointers by changing them into casts to the appropriate
798 // integer type. This promotes constant folding and simplifies this code.
799 Constant *Op = CE->getOperand(0);
800 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
801 return EmitConstantValueOnly(Op);
805 case Instruction::PtrToInt: {
806 // Support only foldable casts to/from pointers that can be eliminated by
807 // changing the pointer to the appropriately sized integer type.
808 Constant *Op = CE->getOperand(0);
809 const Type *Ty = CE->getType();
811 // We can emit the pointer value into this slot if the slot is an
812 // integer slot greater or equal to the size of the pointer.
813 if (Ty->isInteger() &&
814 TD->getABITypeSize(Ty) >= TD->getABITypeSize(Op->getType()))
815 return EmitConstantValueOnly(Op);
817 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
818 EmitConstantValueOnly(Op);
821 case Instruction::Add:
822 case Instruction::Sub:
823 case Instruction::And:
824 case Instruction::Or:
825 case Instruction::Xor:
827 EmitConstantValueOnly(CE->getOperand(0));
830 case Instruction::Add:
833 case Instruction::Sub:
836 case Instruction::And:
839 case Instruction::Or:
842 case Instruction::Xor:
849 EmitConstantValueOnly(CE->getOperand(1));
853 assert(0 && "Unsupported operator!");
856 assert(0 && "Unknown constant value!");
860 /// printAsCString - Print the specified array as a C compatible string, only if
861 /// the predicate isString is true.
863 static void printAsCString(std::ostream &O, const ConstantArray *CVA,
865 assert(CVA->isString() && "Array is not string compatible!");
868 for (unsigned i = 0; i != LastElt; ++i) {
870 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
871 printStringChar(O, C);
876 /// EmitString - Emit a zero-byte-terminated string constant.
878 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
879 unsigned NumElts = CVA->getNumOperands();
880 if (TAI->getAscizDirective() && NumElts &&
881 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
882 O << TAI->getAscizDirective();
883 printAsCString(O, CVA, NumElts-1);
885 O << TAI->getAsciiDirective();
886 printAsCString(O, CVA, NumElts);
891 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
892 void AsmPrinter::EmitGlobalConstant(const Constant *CV) {
893 const TargetData *TD = TM.getTargetData();
894 unsigned Size = TD->getABITypeSize(CV->getType());
896 if (CV->isNullValue() || isa<UndefValue>(CV)) {
899 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
900 if (CVA->isString()) {
902 } else { // Not a string. Print the values in successive locations
903 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
904 EmitGlobalConstant(CVA->getOperand(i));
907 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
908 // Print the fields in successive locations. Pad to align if needed!
909 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
910 uint64_t sizeSoFar = 0;
911 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
912 const Constant* field = CVS->getOperand(i);
914 // Check if padding is needed and insert one or more 0s.
915 uint64_t fieldSize = TD->getABITypeSize(field->getType());
916 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
917 - cvsLayout->getElementOffset(i)) - fieldSize;
918 sizeSoFar += fieldSize + padSize;
920 // Now print the actual field value.
921 EmitGlobalConstant(field);
923 // Insert padding - this may include padding to increase the size of the
924 // current field up to the ABI size (if the struct is not packed) as well
925 // as padding to ensure that the next field starts at the right offset.
928 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
929 "Layout of constant struct may be incorrect!");
931 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
932 // FP Constants are printed as integer constants to avoid losing
934 if (CFP->getType() == Type::DoubleTy) {
935 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
936 uint64_t i = CFP->getValueAPF().convertToAPInt().getZExtValue();
937 if (TAI->getData64bitsDirective())
938 O << TAI->getData64bitsDirective() << i << "\t"
939 << TAI->getCommentString() << " double value: " << Val << "\n";
940 else if (TD->isBigEndian()) {
941 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
942 << "\t" << TAI->getCommentString()
943 << " double most significant word " << Val << "\n";
944 O << TAI->getData32bitsDirective() << unsigned(i)
945 << "\t" << TAI->getCommentString()
946 << " double least significant word " << Val << "\n";
948 O << TAI->getData32bitsDirective() << unsigned(i)
949 << "\t" << TAI->getCommentString()
950 << " double least significant word " << Val << "\n";
951 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
952 << "\t" << TAI->getCommentString()
953 << " double most significant word " << Val << "\n";
956 } else if (CFP->getType() == Type::FloatTy) {
957 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
958 O << TAI->getData32bitsDirective()
959 << CFP->getValueAPF().convertToAPInt().getZExtValue()
960 << "\t" << TAI->getCommentString() << " float " << Val << "\n";
962 } else if (CFP->getType() == Type::X86_FP80Ty) {
963 // all long double variants are printed as hex
964 // api needed to prevent premature destruction
965 APInt api = CFP->getValueAPF().convertToAPInt();
966 const uint64_t *p = api.getRawData();
967 APFloat DoubleVal = CFP->getValueAPF();
968 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven);
969 if (TD->isBigEndian()) {
970 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
971 << "\t" << TAI->getCommentString()
972 << " long double most significant halfword of ~"
973 << DoubleVal.convertToDouble() << "\n";
974 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
975 << "\t" << TAI->getCommentString()
976 << " long double next halfword\n";
977 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
978 << "\t" << TAI->getCommentString()
979 << " long double next halfword\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[1])
984 << "\t" << TAI->getCommentString()
985 << " long double least significant halfword\n";
987 O << TAI->getData16bitsDirective() << uint16_t(p[1])
988 << "\t" << TAI->getCommentString()
989 << " long double least significant halfword of ~"
990 << DoubleVal.convertToDouble() << "\n";
991 O << TAI->getData16bitsDirective() << uint16_t(p[0])
992 << "\t" << TAI->getCommentString()
993 << " long double next halfword\n";
994 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
995 << "\t" << TAI->getCommentString()
996 << " long double next halfword\n";
997 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
998 << "\t" << TAI->getCommentString()
999 << " long double next halfword\n";
1000 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
1001 << "\t" << TAI->getCommentString()
1002 << " long double most significant halfword\n";
1004 EmitZeros(Size - TD->getTypeStoreSize(Type::X86_FP80Ty));
1006 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1007 // all long double variants are printed as hex
1008 // api needed to prevent premature destruction
1009 APInt api = CFP->getValueAPF().convertToAPInt();
1010 const uint64_t *p = api.getRawData();
1011 if (TD->isBigEndian()) {
1012 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1013 << "\t" << TAI->getCommentString()
1014 << " long double most significant word\n";
1015 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1016 << "\t" << TAI->getCommentString()
1017 << " long double next word\n";
1018 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1019 << "\t" << TAI->getCommentString()
1020 << " long double next word\n";
1021 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1022 << "\t" << TAI->getCommentString()
1023 << " long double least significant word\n";
1025 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1026 << "\t" << TAI->getCommentString()
1027 << " long double least significant word\n";
1028 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1029 << "\t" << TAI->getCommentString()
1030 << " long double next word\n";
1031 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1032 << "\t" << TAI->getCommentString()
1033 << " long double next word\n";
1034 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1035 << "\t" << TAI->getCommentString()
1036 << " long double most significant word\n";
1039 } else assert(0 && "Floating point constant type not handled");
1040 } else if (CV->getType() == Type::Int64Ty) {
1041 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1042 uint64_t Val = CI->getZExtValue();
1044 if (TAI->getData64bitsDirective())
1045 O << TAI->getData64bitsDirective() << Val << "\n";
1046 else if (TD->isBigEndian()) {
1047 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1048 << "\t" << TAI->getCommentString()
1049 << " Double-word most significant word " << Val << "\n";
1050 O << TAI->getData32bitsDirective() << unsigned(Val)
1051 << "\t" << TAI->getCommentString()
1052 << " Double-word least significant word " << Val << "\n";
1054 O << TAI->getData32bitsDirective() << unsigned(Val)
1055 << "\t" << TAI->getCommentString()
1056 << " Double-word least significant word " << Val << "\n";
1057 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1058 << "\t" << TAI->getCommentString()
1059 << " Double-word most significant word " << Val << "\n";
1063 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1064 const VectorType *PTy = CP->getType();
1066 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
1067 EmitGlobalConstant(CP->getOperand(I));
1072 const Type *type = CV->getType();
1073 printDataDirective(type);
1074 EmitConstantValueOnly(CV);
1075 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1077 << TAI->getCommentString()
1078 << " 0x" << CI->getValue().toStringUnsigned(16);
1084 AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1085 // Target doesn't support this yet!
1089 /// PrintSpecial - Print information related to the specified machine instr
1090 /// that is independent of the operand, and may be independent of the instr
1091 /// itself. This can be useful for portably encoding the comment character
1092 /// or other bits of target-specific knowledge into the asmstrings. The
1093 /// syntax used is ${:comment}. Targets can override this to add support
1094 /// for their own strange codes.
1095 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) {
1096 if (!strcmp(Code, "private")) {
1097 O << TAI->getPrivateGlobalPrefix();
1098 } else if (!strcmp(Code, "comment")) {
1099 O << TAI->getCommentString();
1100 } else if (!strcmp(Code, "uid")) {
1101 // Assign a unique ID to this machine instruction.
1102 static const MachineInstr *LastMI = 0;
1103 static const Function *F = 0;
1104 static unsigned Counter = 0U-1;
1106 // Comparing the address of MI isn't sufficient, because machineinstrs may
1107 // be allocated to the same address across functions.
1108 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1110 // If this is a new machine instruction, bump the counter.
1111 if (LastMI != MI || F != ThisF) {
1118 cerr << "Unknown special formatter '" << Code
1119 << "' for machine instr: " << *MI;
1125 /// printInlineAsm - This method formats and prints the specified machine
1126 /// instruction that is an inline asm.
1127 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1128 unsigned NumOperands = MI->getNumOperands();
1130 // Count the number of register definitions.
1131 unsigned NumDefs = 0;
1132 for (; MI->getOperand(NumDefs).isRegister() && MI->getOperand(NumDefs).isDef();
1134 assert(NumDefs != NumOperands-1 && "No asm string?");
1136 assert(MI->getOperand(NumDefs).isExternalSymbol() && "No asm string?");
1138 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1139 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1141 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1142 // These are useful to see where empty asm's wound up.
1143 if (AsmStr[0] == 0) {
1144 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << "\n";
1148 O << TAI->getInlineAsmStart() << "\n\t";
1150 // The variant of the current asmprinter.
1151 int AsmPrinterVariant = TAI->getAssemblerDialect();
1153 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1154 const char *LastEmitted = AsmStr; // One past the last character emitted.
1156 while (*LastEmitted) {
1157 switch (*LastEmitted) {
1159 // Not a special case, emit the string section literally.
1160 const char *LiteralEnd = LastEmitted+1;
1161 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1162 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1164 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1165 O.write(LastEmitted, LiteralEnd-LastEmitted);
1166 LastEmitted = LiteralEnd;
1170 ++LastEmitted; // Consume newline character.
1171 O << "\n"; // Indent code with newline.
1174 ++LastEmitted; // Consume '$' character.
1178 switch (*LastEmitted) {
1179 default: Done = false; break;
1180 case '$': // $$ -> $
1181 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1183 ++LastEmitted; // Consume second '$' character.
1185 case '(': // $( -> same as GCC's { character.
1186 ++LastEmitted; // Consume '(' character.
1187 if (CurVariant != -1) {
1188 cerr << "Nested variants found in inline asm string: '"
1192 CurVariant = 0; // We're in the first variant now.
1195 ++LastEmitted; // consume '|' character.
1196 if (CurVariant == -1) {
1197 cerr << "Found '|' character outside of variant in inline asm "
1198 << "string: '" << AsmStr << "'\n";
1201 ++CurVariant; // We're in the next variant.
1203 case ')': // $) -> same as GCC's } char.
1204 ++LastEmitted; // consume ')' character.
1205 if (CurVariant == -1) {
1206 cerr << "Found '}' character outside of variant in inline asm "
1207 << "string: '" << AsmStr << "'\n";
1215 bool HasCurlyBraces = false;
1216 if (*LastEmitted == '{') { // ${variable}
1217 ++LastEmitted; // Consume '{' character.
1218 HasCurlyBraces = true;
1221 const char *IDStart = LastEmitted;
1224 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1225 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1226 cerr << "Bad $ operand number in inline asm string: '"
1230 LastEmitted = IDEnd;
1232 char Modifier[2] = { 0, 0 };
1234 if (HasCurlyBraces) {
1235 // If we have curly braces, check for a modifier character. This
1236 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1237 if (*LastEmitted == ':') {
1238 ++LastEmitted; // Consume ':' character.
1239 if (*LastEmitted == 0) {
1240 cerr << "Bad ${:} expression in inline asm string: '"
1245 Modifier[0] = *LastEmitted;
1246 ++LastEmitted; // Consume modifier character.
1249 if (*LastEmitted != '}') {
1250 cerr << "Bad ${} expression in inline asm string: '"
1254 ++LastEmitted; // Consume '}' character.
1257 if ((unsigned)Val >= NumOperands-1) {
1258 cerr << "Invalid $ operand number in inline asm string: '"
1263 // Okay, we finally have a value number. Ask the target to print this
1265 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1270 // Scan to find the machine operand number for the operand.
1271 for (; Val; --Val) {
1272 if (OpNo >= MI->getNumOperands()) break;
1273 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1274 OpNo += (OpFlags >> 3) + 1;
1277 if (OpNo >= MI->getNumOperands()) {
1280 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1281 ++OpNo; // Skip over the ID number.
1283 if (Modifier[0]=='l') // labels are target independent
1284 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1285 false, false, false);
1287 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1288 if ((OpFlags & 7) == 4 /*ADDR MODE*/) {
1289 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1290 Modifier[0] ? Modifier : 0);
1292 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1293 Modifier[0] ? Modifier : 0);
1298 cerr << "Invalid operand found in inline asm: '"
1308 O << "\n\t" << TAI->getInlineAsmEnd() << "\n";
1311 /// printImplicitDef - This method prints the specified machine instruction
1312 /// that is an implicit def.
1313 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1314 O << "\t" << TAI->getCommentString() << " implicit-def: "
1315 << TRI->getAsmName(MI->getOperand(0).getReg()) << "\n";
1318 /// printLabel - This method prints a local label used by debug and
1319 /// exception handling tables.
1320 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1321 O << TAI->getPrivateGlobalPrefix()
1322 << "label" << MI->getOperand(0).getImm() << ":\n";
1325 void AsmPrinter::printLabel(unsigned Id) const {
1326 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1329 /// printDeclare - This method prints a local variable declaration used by
1331 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1332 /// entry into dwarf table.
1333 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1334 int FI = MI->getOperand(0).getIndex();
1335 GlobalValue *GV = MI->getOperand(1).getGlobal();
1336 MMI->RecordVariable(GV, FI);
1339 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1340 /// instruction, using the specified assembler variant. Targets should
1341 /// overried this to format as appropriate.
1342 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1343 unsigned AsmVariant, const char *ExtraCode) {
1344 // Target doesn't support this yet!
1348 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1349 unsigned AsmVariant,
1350 const char *ExtraCode) {
1351 // Target doesn't support this yet!
1355 /// printBasicBlockLabel - This method prints the label for the specified
1356 /// MachineBasicBlock
1357 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1360 bool printComment) const {
1362 unsigned Align = MBB->getAlignment();
1364 EmitAlignment(Log2_32(Align));
1367 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << "_"
1368 << MBB->getNumber();
1371 if (printComment && MBB->getBasicBlock())
1372 O << '\t' << TAI->getCommentString() << ' '
1373 << MBB->getBasicBlock()->getName();
1376 /// printPICJumpTableSetLabel - This method prints a set label for the
1377 /// specified MachineBasicBlock for a jumptable entry.
1378 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1379 const MachineBasicBlock *MBB) const {
1380 if (!TAI->getSetDirective())
1383 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1384 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1385 printBasicBlockLabel(MBB, false, false, false);
1386 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1387 << '_' << uid << '\n';
1390 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1391 const MachineBasicBlock *MBB) const {
1392 if (!TAI->getSetDirective())
1395 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1396 << getFunctionNumber() << '_' << uid << '_' << uid2
1397 << "_set_" << MBB->getNumber() << ',';
1398 printBasicBlockLabel(MBB, false, false, false);
1399 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1400 << '_' << uid << '_' << uid2 << '\n';
1403 /// printDataDirective - This method prints the asm directive for the
1405 void AsmPrinter::printDataDirective(const Type *type) {
1406 const TargetData *TD = TM.getTargetData();
1407 switch (type->getTypeID()) {
1408 case Type::IntegerTyID: {
1409 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1411 O << TAI->getData8bitsDirective();
1412 else if (BitWidth <= 16)
1413 O << TAI->getData16bitsDirective();
1414 else if (BitWidth <= 32)
1415 O << TAI->getData32bitsDirective();
1416 else if (BitWidth <= 64) {
1417 assert(TAI->getData64bitsDirective() &&
1418 "Target cannot handle 64-bit constant exprs!");
1419 O << TAI->getData64bitsDirective();
1423 case Type::PointerTyID:
1424 if (TD->getPointerSize() == 8) {
1425 assert(TAI->getData64bitsDirective() &&
1426 "Target cannot handle 64-bit pointer exprs!");
1427 O << TAI->getData64bitsDirective();
1429 O << TAI->getData32bitsDirective();
1432 case Type::FloatTyID: case Type::DoubleTyID:
1433 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1434 assert (0 && "Should have already output floating point constant.");
1436 assert (0 && "Can't handle printing this type of thing");
1441 void AsmPrinter::printSuffixedName(std::string &Name, const char* Suffix) {
1443 O << "\"" << TAI->getPrivateGlobalPrefix() <<
1444 Name.substr(1, Name.length()-2) << Suffix << "\"";
1446 O << TAI->getPrivateGlobalPrefix() << Name << Suffix;