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 delete Mang; Mang = 0;
199 std::string AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) {
200 assert(MF && "No machine function?");
201 return Mang->makeNameProper(MF->getFunction()->getName() + ".eh",
202 TAI->getGlobalPrefix());
205 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
206 // What's my mangled name?
207 CurrentFnName = Mang->getValueName(MF.getFunction());
208 IncrementFunctionNumber();
211 /// EmitConstantPool - Print to the current output stream assembly
212 /// representations of the constants in the constant pool MCP. This is
213 /// used to print out constants which have been "spilled to memory" by
214 /// the code generator.
216 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
217 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
218 if (CP.empty()) return;
220 // Some targets require 4-, 8-, and 16- byte constant literals to be placed
221 // in special sections.
222 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > FourByteCPs;
223 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > EightByteCPs;
224 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > SixteenByteCPs;
225 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > OtherCPs;
226 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > TargetCPs;
227 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
228 MachineConstantPoolEntry CPE = CP[i];
229 const Type *Ty = CPE.getType();
230 if (TAI->getFourByteConstantSection() &&
231 TM.getTargetData()->getABITypeSize(Ty) == 4)
232 FourByteCPs.push_back(std::make_pair(CPE, i));
233 else if (TAI->getEightByteConstantSection() &&
234 TM.getTargetData()->getABITypeSize(Ty) == 8)
235 EightByteCPs.push_back(std::make_pair(CPE, i));
236 else if (TAI->getSixteenByteConstantSection() &&
237 TM.getTargetData()->getABITypeSize(Ty) == 16)
238 SixteenByteCPs.push_back(std::make_pair(CPE, i));
240 OtherCPs.push_back(std::make_pair(CPE, i));
243 unsigned Alignment = MCP->getConstantPoolAlignment();
244 EmitConstantPool(Alignment, TAI->getFourByteConstantSection(), FourByteCPs);
245 EmitConstantPool(Alignment, TAI->getEightByteConstantSection(), EightByteCPs);
246 EmitConstantPool(Alignment, TAI->getSixteenByteConstantSection(),
248 EmitConstantPool(Alignment, TAI->getConstantPoolSection(), OtherCPs);
251 void AsmPrinter::EmitConstantPool(unsigned Alignment, const char *Section,
252 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > &CP) {
253 if (CP.empty()) return;
255 SwitchToDataSection(Section);
256 EmitAlignment(Alignment);
257 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
258 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
259 << CP[i].second << ":\t\t\t\t\t" << TAI->getCommentString() << " ";
260 WriteTypeSymbolic(O, CP[i].first.getType(), 0) << '\n';
261 if (CP[i].first.isMachineConstantPoolEntry())
262 EmitMachineConstantPoolValue(CP[i].first.Val.MachineCPVal);
264 EmitGlobalConstant(CP[i].first.Val.ConstVal);
266 const Type *Ty = CP[i].first.getType();
268 TM.getTargetData()->getABITypeSize(Ty);
269 unsigned ValEnd = CP[i].first.getOffset() + EntSize;
270 // Emit inter-object padding for alignment.
271 EmitZeros(CP[i+1].first.getOffset()-ValEnd);
276 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
277 /// by the current function to the current output stream.
279 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
280 MachineFunction &MF) {
281 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
282 if (JT.empty()) return;
284 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
286 // Pick the directive to use to print the jump table entries, and switch to
287 // the appropriate section.
288 TargetLowering *LoweringInfo = TM.getTargetLowering();
290 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
291 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
292 !JumpTableDataSection) {
293 // In PIC mode, we need to emit the jump table to the same section as the
294 // function body itself, otherwise the label differences won't make sense.
295 // We should also do if the section name is NULL.
296 const Function *F = MF.getFunction();
297 SwitchToTextSection(getSectionForFunction(*F).c_str(), F);
299 SwitchToDataSection(JumpTableDataSection);
302 EmitAlignment(Log2_32(MJTI->getAlignment()));
304 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
305 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
307 // If this jump table was deleted, ignore it.
308 if (JTBBs.empty()) continue;
310 // For PIC codegen, if possible we want to use the SetDirective to reduce
311 // the number of relocations the assembler will generate for the jump table.
312 // Set directives are all printed before the jump table itself.
313 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
314 if (TAI->getSetDirective() && IsPic)
315 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
316 if (EmittedSets.insert(JTBBs[ii]))
317 printPICJumpTableSetLabel(i, JTBBs[ii]);
319 // On some targets (e.g. darwin) we want to emit two consequtive labels
320 // before each jump table. The first label is never referenced, but tells
321 // the assembler and linker the extents of the jump table object. The
322 // second label is actually referenced by the code.
323 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
324 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
326 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
327 << '_' << i << ":\n";
329 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
330 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
336 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
337 const MachineBasicBlock *MBB,
338 unsigned uid) const {
339 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
341 // Use JumpTableDirective otherwise honor the entry size from the jump table
343 const char *JTEntryDirective = TAI->getJumpTableDirective();
344 bool HadJTEntryDirective = JTEntryDirective != NULL;
345 if (!HadJTEntryDirective) {
346 JTEntryDirective = MJTI->getEntrySize() == 4 ?
347 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
350 O << JTEntryDirective << ' ';
352 // If we have emitted set directives for the jump table entries, print
353 // them rather than the entries themselves. If we're emitting PIC, then
354 // emit the table entries as differences between two text section labels.
355 // If we're emitting non-PIC code, then emit the entries as direct
356 // references to the target basic blocks.
358 if (TAI->getSetDirective()) {
359 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
360 << '_' << uid << "_set_" << MBB->getNumber();
362 printBasicBlockLabel(MBB, false, false, false);
363 // If the arch uses custom Jump Table directives, don't calc relative to
365 if (!HadJTEntryDirective)
366 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
367 << getFunctionNumber() << '_' << uid;
370 printBasicBlockLabel(MBB, false, false, false);
375 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
376 /// special global used by LLVM. If so, emit it and return true, otherwise
377 /// do nothing and return false.
378 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
379 if (GV->getName() == "llvm.used") {
380 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
381 EmitLLVMUsedList(GV->getInitializer());
385 // Ignore debug and non-emitted data.
386 if (GV->getSection() == "llvm.metadata") return true;
388 if (!GV->hasAppendingLinkage()) return false;
390 assert(GV->hasInitializer() && "Not a special LLVM global!");
392 const TargetData *TD = TM.getTargetData();
393 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
394 if (GV->getName() == "llvm.global_ctors" && GV->use_empty()) {
395 SwitchToDataSection(TAI->getStaticCtorsSection());
396 EmitAlignment(Align, 0);
397 EmitXXStructorList(GV->getInitializer());
401 if (GV->getName() == "llvm.global_dtors" && GV->use_empty()) {
402 SwitchToDataSection(TAI->getStaticDtorsSection());
403 EmitAlignment(Align, 0);
404 EmitXXStructorList(GV->getInitializer());
411 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
412 /// global in the specified llvm.used list as being used with this directive.
413 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
414 const char *Directive = TAI->getUsedDirective();
416 // Should be an array of 'sbyte*'.
417 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
418 if (InitList == 0) return;
420 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
422 EmitConstantValueOnly(InitList->getOperand(i));
427 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
428 /// function pointers, ignoring the init priority.
429 void AsmPrinter::EmitXXStructorList(Constant *List) {
430 // Should be an array of '{ int, void ()* }' structs. The first value is the
431 // init priority, which we ignore.
432 if (!isa<ConstantArray>(List)) return;
433 ConstantArray *InitList = cast<ConstantArray>(List);
434 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
435 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
436 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
438 if (CS->getOperand(1)->isNullValue())
439 return; // Found a null terminator, exit printing.
440 // Emit the function pointer.
441 EmitGlobalConstant(CS->getOperand(1));
445 /// getGlobalLinkName - Returns the asm/link name of of the specified
446 /// global variable. Should be overridden by each target asm printer to
447 /// generate the appropriate value.
448 const std::string AsmPrinter::getGlobalLinkName(const GlobalVariable *GV) const{
449 std::string LinkName;
451 if (isa<Function>(GV)) {
452 LinkName += TAI->getFunctionAddrPrefix();
453 LinkName += Mang->getValueName(GV);
454 LinkName += TAI->getFunctionAddrSuffix();
456 LinkName += TAI->getGlobalVarAddrPrefix();
457 LinkName += Mang->getValueName(GV);
458 LinkName += TAI->getGlobalVarAddrSuffix();
464 /// EmitExternalGlobal - Emit the external reference to a global variable.
465 /// Should be overridden if an indirect reference should be used.
466 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
467 O << getGlobalLinkName(GV);
472 //===----------------------------------------------------------------------===//
473 /// LEB 128 number encoding.
475 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
476 /// representing an unsigned leb128 value.
477 void AsmPrinter::PrintULEB128(unsigned Value) const {
479 unsigned Byte = Value & 0x7f;
481 if (Value) Byte |= 0x80;
482 O << "0x" << std::hex << Byte << std::dec;
483 if (Value) O << ", ";
487 /// SizeULEB128 - Compute the number of bytes required for an unsigned leb128
489 unsigned AsmPrinter::SizeULEB128(unsigned Value) {
493 Size += sizeof(int8_t);
498 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
499 /// representing a signed leb128 value.
500 void AsmPrinter::PrintSLEB128(int Value) const {
501 int Sign = Value >> (8 * sizeof(Value) - 1);
505 unsigned Byte = Value & 0x7f;
507 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
508 if (IsMore) Byte |= 0x80;
509 O << "0x" << std::hex << Byte << std::dec;
510 if (IsMore) O << ", ";
514 /// SizeSLEB128 - Compute the number of bytes required for a signed leb128
516 unsigned AsmPrinter::SizeSLEB128(int Value) {
518 int Sign = Value >> (8 * sizeof(Value) - 1);
522 unsigned Byte = Value & 0x7f;
524 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
525 Size += sizeof(int8_t);
530 //===--------------------------------------------------------------------===//
531 // Emission and print routines
534 /// PrintHex - Print a value as a hexidecimal value.
536 void AsmPrinter::PrintHex(int Value) const {
537 O << "0x" << std::hex << Value << std::dec;
540 /// EOL - Print a newline character to asm stream. If a comment is present
541 /// then it will be printed first. Comments should not contain '\n'.
542 void AsmPrinter::EOL() const {
545 void AsmPrinter::EOL(const std::string &Comment) const {
546 if (AsmVerbose && !Comment.empty()) {
548 << TAI->getCommentString()
555 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
556 /// unsigned leb128 value.
557 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
558 if (TAI->hasLEB128()) {
562 O << TAI->getData8bitsDirective();
567 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
568 /// signed leb128 value.
569 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
570 if (TAI->hasLEB128()) {
574 O << TAI->getData8bitsDirective();
579 /// EmitInt8 - Emit a byte directive and value.
581 void AsmPrinter::EmitInt8(int Value) const {
582 O << TAI->getData8bitsDirective();
583 PrintHex(Value & 0xFF);
586 /// EmitInt16 - Emit a short directive and value.
588 void AsmPrinter::EmitInt16(int Value) const {
589 O << TAI->getData16bitsDirective();
590 PrintHex(Value & 0xFFFF);
593 /// EmitInt32 - Emit a long directive and value.
595 void AsmPrinter::EmitInt32(int Value) const {
596 O << TAI->getData32bitsDirective();
600 /// EmitInt64 - Emit a long long directive and value.
602 void AsmPrinter::EmitInt64(uint64_t Value) const {
603 if (TAI->getData64bitsDirective()) {
604 O << TAI->getData64bitsDirective();
607 if (TM.getTargetData()->isBigEndian()) {
608 EmitInt32(unsigned(Value >> 32)); O << "\n";
609 EmitInt32(unsigned(Value));
611 EmitInt32(unsigned(Value)); O << "\n";
612 EmitInt32(unsigned(Value >> 32));
617 /// toOctal - Convert the low order bits of X into an octal digit.
619 static inline char toOctal(int X) {
623 /// printStringChar - Print a char, escaped if necessary.
625 static void printStringChar(std::ostream &O, unsigned char C) {
628 } else if (C == '\\') {
630 } else if (isprint(C)) {
634 case '\b': O << "\\b"; break;
635 case '\f': O << "\\f"; break;
636 case '\n': O << "\\n"; break;
637 case '\r': O << "\\r"; break;
638 case '\t': O << "\\t"; break;
641 O << toOctal(C >> 6);
642 O << toOctal(C >> 3);
643 O << toOctal(C >> 0);
649 /// EmitString - Emit a string with quotes and a null terminator.
650 /// Special characters are emitted properly.
651 /// \literal (Eg. '\t') \endliteral
652 void AsmPrinter::EmitString(const std::string &String) const {
653 const char* AscizDirective = TAI->getAscizDirective();
657 O << TAI->getAsciiDirective();
659 for (unsigned i = 0, N = String.size(); i < N; ++i) {
660 unsigned char C = String[i];
661 printStringChar(O, C);
670 /// EmitFile - Emit a .file directive.
671 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
672 O << "\t.file\t" << Number << " \"";
673 for (unsigned i = 0, N = Name.size(); i < N; ++i) {
674 unsigned char C = Name[i];
675 printStringChar(O, C);
681 //===----------------------------------------------------------------------===//
683 // EmitAlignment - Emit an alignment directive to the specified power of
684 // two boundary. For example, if you pass in 3 here, you will get an 8
685 // byte alignment. If a global value is specified, and if that global has
686 // an explicit alignment requested, it will unconditionally override the
687 // alignment request. However, if ForcedAlignBits is specified, this value
688 // has final say: the ultimate alignment will be the max of ForcedAlignBits
689 // and the alignment computed with NumBits and the global.
693 // if (GV && GV->hasalignment) Align = GV->getalignment();
694 // Align = std::max(Align, ForcedAlignBits);
696 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
697 unsigned ForcedAlignBits,
698 bool UseFillExpr) const {
699 if (GV && GV->getAlignment())
700 NumBits = Log2_32(GV->getAlignment());
701 NumBits = std::max(NumBits, ForcedAlignBits);
703 if (NumBits == 0) return; // No need to emit alignment.
704 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
705 O << TAI->getAlignDirective() << NumBits;
707 unsigned FillValue = TAI->getTextAlignFillValue();
708 UseFillExpr &= IsInTextSection && FillValue;
709 if (UseFillExpr) O << ",0x" << std::hex << FillValue << std::dec;
714 /// EmitZeros - Emit a block of zeros.
716 void AsmPrinter::EmitZeros(uint64_t NumZeros) const {
718 if (TAI->getZeroDirective()) {
719 O << TAI->getZeroDirective() << NumZeros;
720 if (TAI->getZeroDirectiveSuffix())
721 O << TAI->getZeroDirectiveSuffix();
724 for (; NumZeros; --NumZeros)
725 O << TAI->getData8bitsDirective() << "0\n";
730 // Print out the specified constant, without a storage class. Only the
731 // constants valid in constant expressions can occur here.
732 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
733 if (CV->isNullValue() || isa<UndefValue>(CV))
735 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
736 O << CI->getZExtValue();
737 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
738 // This is a constant address for a global variable or function. Use the
739 // name of the variable or function as the address value, possibly
740 // decorating it with GlobalVarAddrPrefix/Suffix or
741 // FunctionAddrPrefix/Suffix (these all default to "" )
742 if (isa<Function>(GV)) {
743 O << TAI->getFunctionAddrPrefix()
744 << Mang->getValueName(GV)
745 << TAI->getFunctionAddrSuffix();
747 O << TAI->getGlobalVarAddrPrefix()
748 << Mang->getValueName(GV)
749 << TAI->getGlobalVarAddrSuffix();
751 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
752 const TargetData *TD = TM.getTargetData();
753 unsigned Opcode = CE->getOpcode();
755 case Instruction::GetElementPtr: {
756 // generate a symbolic expression for the byte address
757 const Constant *ptrVal = CE->getOperand(0);
758 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
759 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
763 EmitConstantValueOnly(ptrVal);
765 O << ") + " << Offset;
767 O << ") - " << -Offset;
769 EmitConstantValueOnly(ptrVal);
773 case Instruction::Trunc:
774 case Instruction::ZExt:
775 case Instruction::SExt:
776 case Instruction::FPTrunc:
777 case Instruction::FPExt:
778 case Instruction::UIToFP:
779 case Instruction::SIToFP:
780 case Instruction::FPToUI:
781 case Instruction::FPToSI:
782 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
784 case Instruction::BitCast:
785 return EmitConstantValueOnly(CE->getOperand(0));
787 case Instruction::IntToPtr: {
788 // Handle casts to pointers by changing them into casts to the appropriate
789 // integer type. This promotes constant folding and simplifies this code.
790 Constant *Op = CE->getOperand(0);
791 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
792 return EmitConstantValueOnly(Op);
796 case Instruction::PtrToInt: {
797 // Support only foldable casts to/from pointers that can be eliminated by
798 // changing the pointer to the appropriately sized integer type.
799 Constant *Op = CE->getOperand(0);
800 const Type *Ty = CE->getType();
802 // We can emit the pointer value into this slot if the slot is an
803 // integer slot greater or equal to the size of the pointer.
804 if (Ty->isInteger() &&
805 TD->getABITypeSize(Ty) >= TD->getABITypeSize(Op->getType()))
806 return EmitConstantValueOnly(Op);
808 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
809 EmitConstantValueOnly(Op);
812 case Instruction::Add:
813 case Instruction::Sub:
814 case Instruction::And:
815 case Instruction::Or:
816 case Instruction::Xor:
818 EmitConstantValueOnly(CE->getOperand(0));
821 case Instruction::Add:
824 case Instruction::Sub:
827 case Instruction::And:
830 case Instruction::Or:
833 case Instruction::Xor:
840 EmitConstantValueOnly(CE->getOperand(1));
844 assert(0 && "Unsupported operator!");
847 assert(0 && "Unknown constant value!");
851 /// printAsCString - Print the specified array as a C compatible string, only if
852 /// the predicate isString is true.
854 static void printAsCString(std::ostream &O, const ConstantArray *CVA,
856 assert(CVA->isString() && "Array is not string compatible!");
859 for (unsigned i = 0; i != LastElt; ++i) {
861 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
862 printStringChar(O, C);
867 /// EmitString - Emit a zero-byte-terminated string constant.
869 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
870 unsigned NumElts = CVA->getNumOperands();
871 if (TAI->getAscizDirective() && NumElts &&
872 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
873 O << TAI->getAscizDirective();
874 printAsCString(O, CVA, NumElts-1);
876 O << TAI->getAsciiDirective();
877 printAsCString(O, CVA, NumElts);
882 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
883 /// If Packed is false, pad to the ABI size.
884 void AsmPrinter::EmitGlobalConstant(const Constant *CV, bool Packed) {
885 const TargetData *TD = TM.getTargetData();
886 unsigned Size = Packed ?
887 TD->getTypeStoreSize(CV->getType()) : TD->getABITypeSize(CV->getType());
889 if (CV->isNullValue() || isa<UndefValue>(CV)) {
892 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
893 if (CVA->isString()) {
895 } else { // Not a string. Print the values in successive locations
896 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
897 EmitGlobalConstant(CVA->getOperand(i), false);
900 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
901 // Print the fields in successive locations. Pad to align if needed!
902 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
903 uint64_t sizeSoFar = 0;
904 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
905 const Constant* field = CVS->getOperand(i);
907 // Check if padding is needed and insert one or more 0s.
908 uint64_t fieldSize = TD->getTypeStoreSize(field->getType());
909 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
910 - cvsLayout->getElementOffset(i)) - fieldSize;
911 sizeSoFar += fieldSize + padSize;
913 // Now print the actual field value without ABI size padding.
914 EmitGlobalConstant(field, true);
916 // Insert padding - this may include padding to increase the size of the
917 // current field up to the ABI size (if the struct is not packed) as well
918 // as padding to ensure that the next field starts at the right offset.
921 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
922 "Layout of constant struct may be incorrect!");
924 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
925 // FP Constants are printed as integer constants to avoid losing
927 if (CFP->getType() == Type::DoubleTy) {
928 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
929 uint64_t i = CFP->getValueAPF().convertToAPInt().getZExtValue();
930 if (TAI->getData64bitsDirective())
931 O << TAI->getData64bitsDirective() << i << "\t"
932 << TAI->getCommentString() << " double value: " << Val << "\n";
933 else if (TD->isBigEndian()) {
934 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
935 << "\t" << TAI->getCommentString()
936 << " double most significant word " << Val << "\n";
937 O << TAI->getData32bitsDirective() << unsigned(i)
938 << "\t" << TAI->getCommentString()
939 << " double least significant word " << Val << "\n";
941 O << TAI->getData32bitsDirective() << unsigned(i)
942 << "\t" << TAI->getCommentString()
943 << " double least significant word " << Val << "\n";
944 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
945 << "\t" << TAI->getCommentString()
946 << " double most significant word " << Val << "\n";
949 } else if (CFP->getType() == Type::FloatTy) {
950 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
951 O << TAI->getData32bitsDirective()
952 << CFP->getValueAPF().convertToAPInt().getZExtValue()
953 << "\t" << TAI->getCommentString() << " float " << Val << "\n";
955 } else if (CFP->getType() == Type::X86_FP80Ty) {
956 // all long double variants are printed as hex
957 // api needed to prevent premature destruction
958 APInt api = CFP->getValueAPF().convertToAPInt();
959 const uint64_t *p = api.getRawData();
960 APFloat DoubleVal = CFP->getValueAPF();
961 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven);
962 if (TD->isBigEndian()) {
963 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
964 << "\t" << TAI->getCommentString()
965 << " long double most significant halfword of ~"
966 << DoubleVal.convertToDouble() << "\n";
967 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
968 << "\t" << TAI->getCommentString()
969 << " long double next halfword\n";
970 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
971 << "\t" << TAI->getCommentString()
972 << " long double next halfword\n";
973 O << TAI->getData16bitsDirective() << uint16_t(p[0])
974 << "\t" << TAI->getCommentString()
975 << " long double next halfword\n";
976 O << TAI->getData16bitsDirective() << uint16_t(p[1])
977 << "\t" << TAI->getCommentString()
978 << " long double least significant halfword\n";
980 O << TAI->getData16bitsDirective() << uint16_t(p[1])
981 << "\t" << TAI->getCommentString()
982 << " long double least significant halfword of ~"
983 << DoubleVal.convertToDouble() << "\n";
984 O << TAI->getData16bitsDirective() << uint16_t(p[0])
985 << "\t" << TAI->getCommentString()
986 << " long double next halfword\n";
987 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
988 << "\t" << TAI->getCommentString()
989 << " long double next halfword\n";
990 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
991 << "\t" << TAI->getCommentString()
992 << " long double next halfword\n";
993 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
994 << "\t" << TAI->getCommentString()
995 << " long double most significant halfword\n";
997 EmitZeros(Size - TD->getTypeStoreSize(Type::X86_FP80Ty));
999 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1000 // all long double variants are printed as hex
1001 // api needed to prevent premature destruction
1002 APInt api = CFP->getValueAPF().convertToAPInt();
1003 const uint64_t *p = api.getRawData();
1004 if (TD->isBigEndian()) {
1005 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1006 << "\t" << TAI->getCommentString()
1007 << " long double most significant word\n";
1008 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1009 << "\t" << TAI->getCommentString()
1010 << " long double next word\n";
1011 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1012 << "\t" << TAI->getCommentString()
1013 << " long double next word\n";
1014 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1015 << "\t" << TAI->getCommentString()
1016 << " long double least significant word\n";
1018 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1019 << "\t" << TAI->getCommentString()
1020 << " long double least significant word\n";
1021 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1022 << "\t" << TAI->getCommentString()
1023 << " long double next word\n";
1024 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1025 << "\t" << TAI->getCommentString()
1026 << " long double next word\n";
1027 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1028 << "\t" << TAI->getCommentString()
1029 << " long double most significant word\n";
1032 } else assert(0 && "Floating point constant type not handled");
1033 } else if (CV->getType() == Type::Int64Ty) {
1034 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1035 uint64_t Val = CI->getZExtValue();
1037 if (TAI->getData64bitsDirective())
1038 O << TAI->getData64bitsDirective() << Val << "\n";
1039 else if (TD->isBigEndian()) {
1040 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1041 << "\t" << TAI->getCommentString()
1042 << " Double-word most significant word " << Val << "\n";
1043 O << TAI->getData32bitsDirective() << unsigned(Val)
1044 << "\t" << TAI->getCommentString()
1045 << " Double-word least significant word " << Val << "\n";
1047 O << TAI->getData32bitsDirective() << unsigned(Val)
1048 << "\t" << TAI->getCommentString()
1049 << " Double-word least significant word " << Val << "\n";
1050 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1051 << "\t" << TAI->getCommentString()
1052 << " Double-word most significant word " << Val << "\n";
1056 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1057 const VectorType *PTy = CP->getType();
1059 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
1060 EmitGlobalConstant(CP->getOperand(I), false);
1065 const Type *type = CV->getType();
1066 printDataDirective(type);
1067 EmitConstantValueOnly(CV);
1072 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 O << TAI->getPrivateGlobalPrefix()
1310 << "label" << MI->getOperand(0).getImm() << ":\n";
1313 void AsmPrinter::printLabel(unsigned Id) const {
1314 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1317 /// printDeclare - This method prints a local variable declaration used by
1319 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1320 /// entry into dwarf table.
1321 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1322 int FI = MI->getOperand(0).getIndex();
1323 GlobalValue *GV = MI->getOperand(1).getGlobal();
1324 MMI->RecordVariable(GV, FI);
1327 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1328 /// instruction, using the specified assembler variant. Targets should
1329 /// overried this to format as appropriate.
1330 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1331 unsigned AsmVariant, const char *ExtraCode) {
1332 // Target doesn't support this yet!
1336 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1337 unsigned AsmVariant,
1338 const char *ExtraCode) {
1339 // Target doesn't support this yet!
1343 /// printBasicBlockLabel - This method prints the label for the specified
1344 /// MachineBasicBlock
1345 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1348 bool printComment) const {
1350 unsigned Align = MBB->getAlignment();
1352 EmitAlignment(Log2_32(Align));
1355 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << "_"
1356 << MBB->getNumber();
1359 if (printComment && MBB->getBasicBlock())
1360 O << '\t' << TAI->getCommentString() << ' '
1361 << MBB->getBasicBlock()->getName();
1364 /// printPICJumpTableSetLabel - This method prints a set label for the
1365 /// specified MachineBasicBlock for a jumptable entry.
1366 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1367 const MachineBasicBlock *MBB) const {
1368 if (!TAI->getSetDirective())
1371 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1372 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1373 printBasicBlockLabel(MBB, false, false, false);
1374 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1375 << '_' << uid << '\n';
1378 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1379 const MachineBasicBlock *MBB) const {
1380 if (!TAI->getSetDirective())
1383 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1384 << getFunctionNumber() << '_' << uid << '_' << uid2
1385 << "_set_" << MBB->getNumber() << ',';
1386 printBasicBlockLabel(MBB, false, false, false);
1387 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1388 << '_' << uid << '_' << uid2 << '\n';
1391 /// printDataDirective - This method prints the asm directive for the
1393 void AsmPrinter::printDataDirective(const Type *type) {
1394 const TargetData *TD = TM.getTargetData();
1395 switch (type->getTypeID()) {
1396 case Type::IntegerTyID: {
1397 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1399 O << TAI->getData8bitsDirective();
1400 else if (BitWidth <= 16)
1401 O << TAI->getData16bitsDirective();
1402 else if (BitWidth <= 32)
1403 O << TAI->getData32bitsDirective();
1404 else if (BitWidth <= 64) {
1405 assert(TAI->getData64bitsDirective() &&
1406 "Target cannot handle 64-bit constant exprs!");
1407 O << TAI->getData64bitsDirective();
1411 case Type::PointerTyID:
1412 if (TD->getPointerSize() == 8) {
1413 assert(TAI->getData64bitsDirective() &&
1414 "Target cannot handle 64-bit pointer exprs!");
1415 O << TAI->getData64bitsDirective();
1417 O << TAI->getData32bitsDirective();
1420 case Type::FloatTyID: case Type::DoubleTyID:
1421 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1422 assert (0 && "Should have already output floating point constant.");
1424 assert (0 && "Can't handle printing this type of thing");