1 //===-- AsmPrinter.cpp - Common AsmPrinter code ---------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This file implements the AsmPrinter class.
12 //===----------------------------------------------------------------------===//
14 #include "llvm/CodeGen/AsmPrinter.h"
15 #include "llvm/Assembly/Writer.h"
16 #include "llvm/DerivedTypes.h"
17 #include "llvm/Constants.h"
18 #include "llvm/Module.h"
19 #include "llvm/CodeGen/GCMetadataPrinter.h"
20 #include "llvm/CodeGen/MachineConstantPool.h"
21 #include "llvm/CodeGen/MachineJumpTableInfo.h"
22 #include "llvm/CodeGen/MachineModuleInfo.h"
23 #include "llvm/Support/Mangler.h"
24 #include "llvm/Support/raw_ostream.h"
25 #include "llvm/Target/TargetAsmInfo.h"
26 #include "llvm/Target/TargetData.h"
27 #include "llvm/Target/TargetLowering.h"
28 #include "llvm/Target/TargetMachine.h"
29 #include "llvm/Target/TargetOptions.h"
30 #include "llvm/Target/TargetRegisterInfo.h"
31 #include "llvm/ADT/SmallPtrSet.h"
32 #include "llvm/ADT/SmallString.h"
33 #include "llvm/ADT/StringExtras.h"
37 char AsmPrinter::ID = 0;
38 AsmPrinter::AsmPrinter(raw_ostream &o, TargetMachine &tm,
39 const TargetAsmInfo *T)
40 : MachineFunctionPass(&ID), FunctionNumber(0), O(o),
41 TM(tm), TAI(T), TRI(tm.getRegisterInfo()),
42 IsInTextSection(false)
45 AsmPrinter::~AsmPrinter() {
46 for (gcp_iterator I = GCMetadataPrinters.begin(),
47 E = GCMetadataPrinters.end(); I != E; ++I)
51 /// 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;
103 /// SwitchToSection - Switch to the specified section of the executable if we
104 /// are not already in it!
105 void AsmPrinter::SwitchToSection(const Section* NS) {
106 const std::string& NewSection = NS->getName();
108 // If we're already in this section, we're done.
109 if (CurrentSection == NewSection) return;
111 // Close the current section, if applicable.
112 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
113 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
115 // FIXME: Make CurrentSection a Section* in the future
116 CurrentSection = NewSection;
118 if (!CurrentSection.empty())
119 O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
121 IsInTextSection = (NS->getFlags() & SectionFlags::Code);
124 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
125 MachineFunctionPass::getAnalysisUsage(AU);
126 AU.addRequired<GCModuleInfo>();
129 bool AsmPrinter::doInitialization(Module &M) {
130 Mang = new Mangler(M, TAI->getGlobalPrefix());
132 GCModuleInfo *MI = getAnalysisToUpdate<GCModuleInfo>();
133 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
134 for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
135 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
136 MP->beginAssembly(O, *this, *TAI);
138 if (!M.getModuleInlineAsm().empty())
139 O << TAI->getCommentString() << " Start of file scope inline assembly\n"
140 << M.getModuleInlineAsm()
141 << '\n' << TAI->getCommentString()
142 << " End of file scope inline assembly\n";
144 SwitchToDataSection(""); // Reset back to no section.
146 MMI = getAnalysisToUpdate<MachineModuleInfo>();
147 if (MMI) MMI->AnalyzeModule(M);
152 bool AsmPrinter::doFinalization(Module &M) {
153 if (TAI->getWeakRefDirective()) {
154 if (!ExtWeakSymbols.empty())
155 SwitchToDataSection("");
157 for (std::set<const GlobalValue*>::iterator i = ExtWeakSymbols.begin(),
158 e = ExtWeakSymbols.end(); i != e; ++i) {
159 const GlobalValue *GV = *i;
160 std::string Name = Mang->getValueName(GV);
161 O << TAI->getWeakRefDirective() << Name << '\n';
165 if (TAI->getSetDirective()) {
166 if (!M.alias_empty())
167 SwitchToTextSection(TAI->getTextSection());
170 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
172 std::string Name = Mang->getValueName(I);
175 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
176 Target = Mang->getValueName(GV);
178 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
179 O << "\t.globl\t" << Name << '\n';
180 else if (I->hasWeakLinkage())
181 O << TAI->getWeakRefDirective() << Name << '\n';
182 else if (!I->hasInternalLinkage())
183 assert(0 && "Invalid alias linkage");
185 if (I->hasHiddenVisibility()) {
186 if (const char *Directive = TAI->getHiddenDirective())
187 O << Directive << Name << '\n';
188 } else if (I->hasProtectedVisibility()) {
189 if (const char *Directive = TAI->getProtectedDirective())
190 O << Directive << Name << '\n';
193 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
195 // If the aliasee has external weak linkage it can be referenced only by
196 // alias itself. In this case it can be not in ExtWeakSymbols list. Emit
197 // weak reference in such case.
198 if (GV->hasExternalWeakLinkage()) {
199 if (TAI->getWeakRefDirective())
200 O << TAI->getWeakRefDirective() << Target << '\n';
202 O << "\t.globl\t" << Target << '\n';
207 GCModuleInfo *MI = getAnalysisToUpdate<GCModuleInfo>();
208 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
209 for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
210 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
211 MP->finishAssembly(O, *this, *TAI);
213 // If we don't have any trampolines, then we don't require stack memory
214 // to be executable. Some targets have a directive to declare this.
215 Function* InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
216 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
217 if (TAI->getNonexecutableStackDirective())
218 O << TAI->getNonexecutableStackDirective() << '\n';
220 delete Mang; Mang = 0;
224 std::string AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) {
225 assert(MF && "No machine function?");
226 std::string Name = MF->getFunction()->getName();
228 Name = Mang->getValueName(MF->getFunction());
229 return Mang->makeNameProper(Name + ".eh", TAI->getGlobalPrefix());
232 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
233 // What's my mangled name?
234 CurrentFnName = Mang->getValueName(MF.getFunction());
235 IncrementFunctionNumber();
238 /// EmitConstantPool - Print to the current output stream assembly
239 /// representations of the constants in the constant pool MCP. This is
240 /// used to print out constants which have been "spilled to memory" by
241 /// the code generator.
243 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
244 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
245 if (CP.empty()) return;
247 // Some targets require 4-, 8-, and 16- byte constant literals to be placed
248 // in special sections.
249 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > FourByteCPs;
250 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > EightByteCPs;
251 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > SixteenByteCPs;
252 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > OtherCPs;
253 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > TargetCPs;
254 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
255 MachineConstantPoolEntry CPE = CP[i];
256 const Type *Ty = CPE.getType();
257 if (TAI->getFourByteConstantSection() &&
258 TM.getTargetData()->getABITypeSize(Ty) == 4)
259 FourByteCPs.push_back(std::make_pair(CPE, i));
260 else if (TAI->getEightByteConstantSection() &&
261 TM.getTargetData()->getABITypeSize(Ty) == 8)
262 EightByteCPs.push_back(std::make_pair(CPE, i));
263 else if (TAI->getSixteenByteConstantSection() &&
264 TM.getTargetData()->getABITypeSize(Ty) == 16)
265 SixteenByteCPs.push_back(std::make_pair(CPE, i));
267 OtherCPs.push_back(std::make_pair(CPE, i));
270 unsigned Alignment = MCP->getConstantPoolAlignment();
271 EmitConstantPool(Alignment, TAI->getFourByteConstantSection(), FourByteCPs);
272 EmitConstantPool(Alignment, TAI->getEightByteConstantSection(), EightByteCPs);
273 EmitConstantPool(Alignment, TAI->getSixteenByteConstantSection(),
275 EmitConstantPool(Alignment, TAI->getConstantPoolSection(), OtherCPs);
278 void AsmPrinter::EmitConstantPool(unsigned Alignment, const char *Section,
279 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > &CP) {
280 if (CP.empty()) return;
282 SwitchToDataSection(Section);
283 EmitAlignment(Alignment);
284 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
285 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
286 << CP[i].second << ":\t\t\t\t\t";
287 // O << TAI->getCommentString() << ' ' <<
288 // WriteTypeSymbolic(O, CP[i].first.getType(), 0);
290 if (CP[i].first.isMachineConstantPoolEntry())
291 EmitMachineConstantPoolValue(CP[i].first.Val.MachineCPVal);
293 EmitGlobalConstant(CP[i].first.Val.ConstVal);
295 const Type *Ty = CP[i].first.getType();
297 TM.getTargetData()->getABITypeSize(Ty);
298 unsigned ValEnd = CP[i].first.getOffset() + EntSize;
299 // Emit inter-object padding for alignment.
300 EmitZeros(CP[i+1].first.getOffset()-ValEnd);
305 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
306 /// by the current function to the current output stream.
308 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
309 MachineFunction &MF) {
310 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
311 if (JT.empty()) return;
313 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
315 // Pick the directive to use to print the jump table entries, and switch to
316 // the appropriate section.
317 TargetLowering *LoweringInfo = TM.getTargetLowering();
319 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
320 const Function *F = MF.getFunction();
321 unsigned SectionFlags = TAI->SectionFlagsForGlobal(F);
322 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
323 !JumpTableDataSection ||
324 SectionFlags & SectionFlags::Linkonce) {
325 // In PIC mode, we need to emit the jump table to the same section as the
326 // function body itself, otherwise the label differences won't make sense.
327 // We should also do if the section name is NULL or function is declared in
328 // discardable section.
329 SwitchToTextSection(TAI->SectionForGlobal(F).c_str(), F);
331 SwitchToDataSection(JumpTableDataSection);
334 EmitAlignment(Log2_32(MJTI->getAlignment()));
336 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
337 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
339 // If this jump table was deleted, ignore it.
340 if (JTBBs.empty()) continue;
342 // For PIC codegen, if possible we want to use the SetDirective to reduce
343 // the number of relocations the assembler will generate for the jump table.
344 // Set directives are all printed before the jump table itself.
345 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
346 if (TAI->getSetDirective() && IsPic)
347 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
348 if (EmittedSets.insert(JTBBs[ii]))
349 printPICJumpTableSetLabel(i, JTBBs[ii]);
351 // On some targets (e.g. darwin) we want to emit two consequtive labels
352 // before each jump table. The first label is never referenced, but tells
353 // the assembler and linker the extents of the jump table object. The
354 // second label is actually referenced by the code.
355 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
356 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
358 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
359 << '_' << i << ":\n";
361 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
362 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
368 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
369 const MachineBasicBlock *MBB,
370 unsigned uid) const {
371 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
373 // Use JumpTableDirective otherwise honor the entry size from the jump table
375 const char *JTEntryDirective = TAI->getJumpTableDirective();
376 bool HadJTEntryDirective = JTEntryDirective != NULL;
377 if (!HadJTEntryDirective) {
378 JTEntryDirective = MJTI->getEntrySize() == 4 ?
379 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
382 O << JTEntryDirective << ' ';
384 // If we have emitted set directives for the jump table entries, print
385 // them rather than the entries themselves. If we're emitting PIC, then
386 // emit the table entries as differences between two text section labels.
387 // If we're emitting non-PIC code, then emit the entries as direct
388 // references to the target basic blocks.
390 if (TAI->getSetDirective()) {
391 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
392 << '_' << uid << "_set_" << MBB->getNumber();
394 printBasicBlockLabel(MBB, false, false, false);
395 // If the arch uses custom Jump Table directives, don't calc relative to
397 if (!HadJTEntryDirective)
398 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
399 << getFunctionNumber() << '_' << uid;
402 printBasicBlockLabel(MBB, false, false, false);
407 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
408 /// special global used by LLVM. If so, emit it and return true, otherwise
409 /// do nothing and return false.
410 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
411 if (GV->getName() == "llvm.used") {
412 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
413 EmitLLVMUsedList(GV->getInitializer());
417 // Ignore debug and non-emitted data.
418 if (GV->getSection() == "llvm.metadata") return true;
420 if (!GV->hasAppendingLinkage()) return false;
422 assert(GV->hasInitializer() && "Not a special LLVM global!");
424 const TargetData *TD = TM.getTargetData();
425 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
426 if (GV->getName() == "llvm.global_ctors" && GV->use_empty()) {
427 SwitchToDataSection(TAI->getStaticCtorsSection());
428 EmitAlignment(Align, 0);
429 EmitXXStructorList(GV->getInitializer());
433 if (GV->getName() == "llvm.global_dtors" && GV->use_empty()) {
434 SwitchToDataSection(TAI->getStaticDtorsSection());
435 EmitAlignment(Align, 0);
436 EmitXXStructorList(GV->getInitializer());
443 /// findGlobalValue - if CV is an expression equivalent to a single
444 /// global value, return that value.
445 const GlobalValue * AsmPrinter::findGlobalValue(const Constant *CV) {
446 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
448 else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
449 const TargetData *TD = TM.getTargetData();
450 unsigned Opcode = CE->getOpcode();
452 case Instruction::GetElementPtr: {
453 const Constant *ptrVal = CE->getOperand(0);
454 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
455 if (TD->getIndexedOffset(ptrVal->getType(), &idxVec[0], idxVec.size()))
457 return findGlobalValue(ptrVal);
459 case Instruction::BitCast:
460 return findGlobalValue(CE->getOperand(0));
468 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
469 /// global in the specified llvm.used list for which emitUsedDirectiveFor
470 /// is true, as being used with this directive.
472 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
473 const char *Directive = TAI->getUsedDirective();
475 // Should be an array of 'sbyte*'.
476 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
477 if (InitList == 0) return;
479 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
480 const GlobalValue *GV = findGlobalValue(InitList->getOperand(i));
481 if (TAI->emitUsedDirectiveFor(GV, Mang)) {
483 EmitConstantValueOnly(InitList->getOperand(i));
489 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
490 /// function pointers, ignoring the init priority.
491 void AsmPrinter::EmitXXStructorList(Constant *List) {
492 // Should be an array of '{ int, void ()* }' structs. The first value is the
493 // init priority, which we ignore.
494 if (!isa<ConstantArray>(List)) return;
495 ConstantArray *InitList = cast<ConstantArray>(List);
496 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
497 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
498 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
500 if (CS->getOperand(1)->isNullValue())
501 return; // Found a null terminator, exit printing.
502 // Emit the function pointer.
503 EmitGlobalConstant(CS->getOperand(1));
507 /// getGlobalLinkName - Returns the asm/link name of of the specified
508 /// global variable. Should be overridden by each target asm printer to
509 /// generate the appropriate value.
510 const std::string AsmPrinter::getGlobalLinkName(const GlobalVariable *GV) const{
511 std::string LinkName;
513 if (isa<Function>(GV)) {
514 LinkName += TAI->getFunctionAddrPrefix();
515 LinkName += Mang->getValueName(GV);
516 LinkName += TAI->getFunctionAddrSuffix();
518 LinkName += TAI->getGlobalVarAddrPrefix();
519 LinkName += Mang->getValueName(GV);
520 LinkName += TAI->getGlobalVarAddrSuffix();
526 /// EmitExternalGlobal - Emit the external reference to a global variable.
527 /// Should be overridden if an indirect reference should be used.
528 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
529 O << getGlobalLinkName(GV);
534 //===----------------------------------------------------------------------===//
535 /// LEB 128 number encoding.
537 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
538 /// representing an unsigned leb128 value.
539 void AsmPrinter::PrintULEB128(unsigned Value) const {
541 unsigned Byte = Value & 0x7f;
543 if (Value) Byte |= 0x80;
544 O << "0x" << utohexstr(Byte);
545 if (Value) O << ", ";
549 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
550 /// representing a signed leb128 value.
551 void AsmPrinter::PrintSLEB128(int Value) const {
552 int Sign = Value >> (8 * sizeof(Value) - 1);
556 unsigned Byte = Value & 0x7f;
558 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
559 if (IsMore) Byte |= 0x80;
560 O << "0x" << utohexstr(Byte);
561 if (IsMore) O << ", ";
565 //===--------------------------------------------------------------------===//
566 // Emission and print routines
569 /// PrintHex - Print a value as a hexidecimal value.
571 void AsmPrinter::PrintHex(int Value) const {
572 O << "0x" << utohexstr(static_cast<unsigned>(Value));
575 /// EOL - Print a newline character to asm stream. If a comment is present
576 /// then it will be printed first. Comments should not contain '\n'.
577 void AsmPrinter::EOL() const {
581 void AsmPrinter::EOL(const std::string &Comment) const {
582 if (VerboseAsm && !Comment.empty()) {
584 << TAI->getCommentString()
591 void AsmPrinter::EOL(const char* Comment) const {
592 if (VerboseAsm && *Comment) {
594 << TAI->getCommentString()
601 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
602 /// unsigned leb128 value.
603 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
604 if (TAI->hasLEB128()) {
608 O << TAI->getData8bitsDirective();
613 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
614 /// signed leb128 value.
615 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
616 if (TAI->hasLEB128()) {
620 O << TAI->getData8bitsDirective();
625 /// EmitInt8 - Emit a byte directive and value.
627 void AsmPrinter::EmitInt8(int Value) const {
628 O << TAI->getData8bitsDirective();
629 PrintHex(Value & 0xFF);
632 /// EmitInt16 - Emit a short directive and value.
634 void AsmPrinter::EmitInt16(int Value) const {
635 O << TAI->getData16bitsDirective();
636 PrintHex(Value & 0xFFFF);
639 /// EmitInt32 - Emit a long directive and value.
641 void AsmPrinter::EmitInt32(int Value) const {
642 O << TAI->getData32bitsDirective();
646 /// EmitInt64 - Emit a long long directive and value.
648 void AsmPrinter::EmitInt64(uint64_t Value) const {
649 if (TAI->getData64bitsDirective()) {
650 O << TAI->getData64bitsDirective();
653 if (TM.getTargetData()->isBigEndian()) {
654 EmitInt32(unsigned(Value >> 32)); O << '\n';
655 EmitInt32(unsigned(Value));
657 EmitInt32(unsigned(Value)); O << '\n';
658 EmitInt32(unsigned(Value >> 32));
663 /// toOctal - Convert the low order bits of X into an octal digit.
665 static inline char toOctal(int X) {
669 /// printStringChar - Print a char, escaped if necessary.
671 static void printStringChar(raw_ostream &O, char C) {
674 } else if (C == '\\') {
676 } else if (isprint(C)) {
680 case '\b': O << "\\b"; break;
681 case '\f': O << "\\f"; break;
682 case '\n': O << "\\n"; break;
683 case '\r': O << "\\r"; break;
684 case '\t': O << "\\t"; break;
687 O << toOctal(C >> 6);
688 O << toOctal(C >> 3);
689 O << toOctal(C >> 0);
695 /// EmitString - Emit a string with quotes and a null terminator.
696 /// Special characters are emitted properly.
697 /// \literal (Eg. '\t') \endliteral
698 void AsmPrinter::EmitString(const std::string &String) const {
699 const char* AscizDirective = TAI->getAscizDirective();
703 O << TAI->getAsciiDirective();
705 for (unsigned i = 0, N = String.size(); i < N; ++i) {
706 unsigned char C = String[i];
707 printStringChar(O, C);
716 /// EmitFile - Emit a .file directive.
717 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
718 O << "\t.file\t" << Number << " \"";
719 for (unsigned i = 0, N = Name.size(); i < N; ++i) {
720 unsigned char C = Name[i];
721 printStringChar(O, C);
727 //===----------------------------------------------------------------------===//
729 // EmitAlignment - Emit an alignment directive to the specified power of
730 // two boundary. For example, if you pass in 3 here, you will get an 8
731 // byte alignment. If a global value is specified, and if that global has
732 // an explicit alignment requested, it will unconditionally override the
733 // alignment request. However, if ForcedAlignBits is specified, this value
734 // has final say: the ultimate alignment will be the max of ForcedAlignBits
735 // and the alignment computed with NumBits and the global.
739 // if (GV && GV->hasalignment) Align = GV->getalignment();
740 // Align = std::max(Align, ForcedAlignBits);
742 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
743 unsigned ForcedAlignBits,
744 bool UseFillExpr) const {
745 if (GV && GV->getAlignment())
746 NumBits = Log2_32(GV->getAlignment());
747 NumBits = std::max(NumBits, ForcedAlignBits);
749 if (NumBits == 0) return; // No need to emit alignment.
750 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
751 O << TAI->getAlignDirective() << NumBits;
753 unsigned FillValue = TAI->getTextAlignFillValue();
754 UseFillExpr &= IsInTextSection && FillValue;
755 if (UseFillExpr) O << ",0x" << utohexstr(FillValue);
760 /// EmitZeros - Emit a block of zeros.
762 void AsmPrinter::EmitZeros(uint64_t NumZeros) const {
764 if (TAI->getZeroDirective()) {
765 O << TAI->getZeroDirective() << NumZeros;
766 if (TAI->getZeroDirectiveSuffix())
767 O << TAI->getZeroDirectiveSuffix();
770 for (; NumZeros; --NumZeros)
771 O << TAI->getData8bitsDirective() << "0\n";
776 // Print out the specified constant, without a storage class. Only the
777 // constants valid in constant expressions can occur here.
778 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
779 if (CV->isNullValue() || isa<UndefValue>(CV))
781 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
782 O << CI->getZExtValue();
783 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
784 // This is a constant address for a global variable or function. Use the
785 // name of the variable or function as the address value, possibly
786 // decorating it with GlobalVarAddrPrefix/Suffix or
787 // FunctionAddrPrefix/Suffix (these all default to "" )
788 if (isa<Function>(GV)) {
789 O << TAI->getFunctionAddrPrefix()
790 << Mang->getValueName(GV)
791 << TAI->getFunctionAddrSuffix();
793 O << TAI->getGlobalVarAddrPrefix()
794 << Mang->getValueName(GV)
795 << TAI->getGlobalVarAddrSuffix();
797 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
798 const TargetData *TD = TM.getTargetData();
799 unsigned Opcode = CE->getOpcode();
801 case Instruction::GetElementPtr: {
802 // generate a symbolic expression for the byte address
803 const Constant *ptrVal = CE->getOperand(0);
804 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
805 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
809 EmitConstantValueOnly(ptrVal);
811 O << ") + " << Offset;
813 O << ") - " << -Offset;
815 EmitConstantValueOnly(ptrVal);
819 case Instruction::Trunc:
820 case Instruction::ZExt:
821 case Instruction::SExt:
822 case Instruction::FPTrunc:
823 case Instruction::FPExt:
824 case Instruction::UIToFP:
825 case Instruction::SIToFP:
826 case Instruction::FPToUI:
827 case Instruction::FPToSI:
828 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
830 case Instruction::BitCast:
831 return EmitConstantValueOnly(CE->getOperand(0));
833 case Instruction::IntToPtr: {
834 // Handle casts to pointers by changing them into casts to the appropriate
835 // integer type. This promotes constant folding and simplifies this code.
836 Constant *Op = CE->getOperand(0);
837 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
838 return EmitConstantValueOnly(Op);
842 case Instruction::PtrToInt: {
843 // Support only foldable casts to/from pointers that can be eliminated by
844 // changing the pointer to the appropriately sized integer type.
845 Constant *Op = CE->getOperand(0);
846 const Type *Ty = CE->getType();
848 // We can emit the pointer value into this slot if the slot is an
849 // integer slot greater or equal to the size of the pointer.
850 if (TD->getABITypeSize(Ty) >= TD->getABITypeSize(Op->getType()))
851 return EmitConstantValueOnly(Op);
854 EmitConstantValueOnly(Op);
855 APInt ptrMask = APInt::getAllOnesValue(TD->getABITypeSizeInBits(Ty));
858 ptrMask.toStringUnsigned(S);
859 O << ") & " << S.c_str() << ')';
862 case Instruction::Add:
863 case Instruction::Sub:
864 case Instruction::And:
865 case Instruction::Or:
866 case Instruction::Xor:
868 EmitConstantValueOnly(CE->getOperand(0));
871 case Instruction::Add:
874 case Instruction::Sub:
877 case Instruction::And:
880 case Instruction::Or:
883 case Instruction::Xor:
890 EmitConstantValueOnly(CE->getOperand(1));
894 assert(0 && "Unsupported operator!");
897 assert(0 && "Unknown constant value!");
901 /// printAsCString - Print the specified array as a C compatible string, only if
902 /// the predicate isString is true.
904 static void printAsCString(raw_ostream &O, const ConstantArray *CVA,
906 assert(CVA->isString() && "Array is not string compatible!");
909 for (unsigned i = 0; i != LastElt; ++i) {
911 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
912 printStringChar(O, C);
917 /// EmitString - Emit a zero-byte-terminated string constant.
919 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
920 unsigned NumElts = CVA->getNumOperands();
921 if (TAI->getAscizDirective() && NumElts &&
922 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
923 O << TAI->getAscizDirective();
924 printAsCString(O, CVA, NumElts-1);
926 O << TAI->getAsciiDirective();
927 printAsCString(O, CVA, NumElts);
932 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
933 void AsmPrinter::EmitGlobalConstant(const Constant *CV) {
934 const TargetData *TD = TM.getTargetData();
935 unsigned Size = TD->getABITypeSize(CV->getType());
937 if (CV->isNullValue() || isa<UndefValue>(CV)) {
940 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
941 if (CVA->isString()) {
943 } else { // Not a string. Print the values in successive locations
944 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
945 EmitGlobalConstant(CVA->getOperand(i));
948 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
949 // Print the fields in successive locations. Pad to align if needed!
950 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
951 uint64_t sizeSoFar = 0;
952 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
953 const Constant* field = CVS->getOperand(i);
955 // Check if padding is needed and insert one or more 0s.
956 uint64_t fieldSize = TD->getABITypeSize(field->getType());
957 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
958 - cvsLayout->getElementOffset(i)) - fieldSize;
959 sizeSoFar += fieldSize + padSize;
961 // Now print the actual field value.
962 EmitGlobalConstant(field);
964 // Insert padding - this may include padding to increase the size of the
965 // current field up to the ABI size (if the struct is not packed) as well
966 // as padding to ensure that the next field starts at the right offset.
969 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
970 "Layout of constant struct may be incorrect!");
972 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
973 // FP Constants are printed as integer constants to avoid losing
975 if (CFP->getType() == Type::DoubleTy) {
976 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
977 uint64_t i = CFP->getValueAPF().convertToAPInt().getZExtValue();
978 if (TAI->getData64bitsDirective())
979 O << TAI->getData64bitsDirective() << i << '\t'
980 << TAI->getCommentString() << " double value: " << Val << '\n';
981 else if (TD->isBigEndian()) {
982 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
983 << '\t' << TAI->getCommentString()
984 << " double most significant word " << Val << '\n';
985 O << TAI->getData32bitsDirective() << unsigned(i)
986 << '\t' << TAI->getCommentString()
987 << " double least significant word " << Val << '\n';
989 O << TAI->getData32bitsDirective() << unsigned(i)
990 << '\t' << TAI->getCommentString()
991 << " double least significant word " << Val << '\n';
992 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
993 << '\t' << TAI->getCommentString()
994 << " double most significant word " << Val << '\n';
997 } else if (CFP->getType() == Type::FloatTy) {
998 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
999 O << TAI->getData32bitsDirective()
1000 << CFP->getValueAPF().convertToAPInt().getZExtValue()
1001 << '\t' << TAI->getCommentString() << " float " << Val << '\n';
1003 } else if (CFP->getType() == Type::X86_FP80Ty) {
1004 // all long double variants are printed as hex
1005 // api needed to prevent premature destruction
1006 APInt api = CFP->getValueAPF().convertToAPInt();
1007 const uint64_t *p = api.getRawData();
1008 APFloat DoubleVal = CFP->getValueAPF();
1009 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven);
1010 if (TD->isBigEndian()) {
1011 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
1012 << '\t' << TAI->getCommentString()
1013 << " long double most significant halfword of ~"
1014 << DoubleVal.convertToDouble() << '\n';
1015 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
1016 << '\t' << TAI->getCommentString()
1017 << " long double next halfword\n";
1018 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
1019 << '\t' << TAI->getCommentString()
1020 << " long double next halfword\n";
1021 O << TAI->getData16bitsDirective() << uint16_t(p[0])
1022 << '\t' << TAI->getCommentString()
1023 << " long double next halfword\n";
1024 O << TAI->getData16bitsDirective() << uint16_t(p[1])
1025 << '\t' << TAI->getCommentString()
1026 << " long double least significant halfword\n";
1028 O << TAI->getData16bitsDirective() << uint16_t(p[1])
1029 << '\t' << TAI->getCommentString()
1030 << " long double least significant halfword of ~"
1031 << DoubleVal.convertToDouble() << '\n';
1032 O << TAI->getData16bitsDirective() << uint16_t(p[0])
1033 << '\t' << TAI->getCommentString()
1034 << " long double next halfword\n";
1035 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
1036 << '\t' << TAI->getCommentString()
1037 << " long double next halfword\n";
1038 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
1039 << '\t' << TAI->getCommentString()
1040 << " long double next halfword\n";
1041 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
1042 << '\t' << TAI->getCommentString()
1043 << " long double most significant halfword\n";
1045 EmitZeros(Size - TD->getTypeStoreSize(Type::X86_FP80Ty));
1047 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1048 // all long double variants are printed as hex
1049 // api needed to prevent premature destruction
1050 APInt api = CFP->getValueAPF().convertToAPInt();
1051 const uint64_t *p = api.getRawData();
1052 if (TD->isBigEndian()) {
1053 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1054 << '\t' << TAI->getCommentString()
1055 << " long double most significant word\n";
1056 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1057 << '\t' << TAI->getCommentString()
1058 << " long double next word\n";
1059 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1060 << '\t' << TAI->getCommentString()
1061 << " long double next word\n";
1062 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1063 << '\t' << TAI->getCommentString()
1064 << " long double least significant word\n";
1066 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1067 << '\t' << TAI->getCommentString()
1068 << " long double least significant word\n";
1069 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1070 << '\t' << TAI->getCommentString()
1071 << " long double next word\n";
1072 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1073 << '\t' << TAI->getCommentString()
1074 << " long double next word\n";
1075 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1076 << '\t' << TAI->getCommentString()
1077 << " long double most significant word\n";
1080 } else assert(0 && "Floating point constant type not handled");
1081 } else if (CV->getType()->isInteger() &&
1082 cast<IntegerType>(CV->getType())->getBitWidth() >= 64) {
1083 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1084 unsigned BitWidth = CI->getBitWidth();
1085 assert(isPowerOf2_32(BitWidth) &&
1086 "Non-power-of-2-sized integers not handled!");
1088 // We don't expect assemblers to support integer data directives
1089 // for more than 64 bits, so we emit the data in at most 64-bit
1090 // quantities at a time.
1091 const uint64_t *RawData = CI->getValue().getRawData();
1092 for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
1094 if (TD->isBigEndian())
1095 Val = RawData[e - i - 1];
1099 if (TAI->getData64bitsDirective())
1100 O << TAI->getData64bitsDirective() << Val << '\n';
1101 else if (TD->isBigEndian()) {
1102 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1103 << '\t' << TAI->getCommentString()
1104 << " Double-word most significant word " << Val << '\n';
1105 O << TAI->getData32bitsDirective() << unsigned(Val)
1106 << '\t' << TAI->getCommentString()
1107 << " Double-word least significant word " << Val << '\n';
1109 O << TAI->getData32bitsDirective() << unsigned(Val)
1110 << '\t' << TAI->getCommentString()
1111 << " Double-word least significant word " << Val << '\n';
1112 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1113 << '\t' << TAI->getCommentString()
1114 << " Double-word most significant word " << Val << '\n';
1119 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1120 const VectorType *PTy = CP->getType();
1122 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
1123 EmitGlobalConstant(CP->getOperand(I));
1128 const Type *type = CV->getType();
1129 printDataDirective(type);
1130 EmitConstantValueOnly(CV);
1131 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1133 CI->getValue().toStringUnsigned(S, 16);
1134 O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
1139 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1140 // Target doesn't support this yet!
1144 /// PrintSpecial - Print information related to the specified machine instr
1145 /// that is independent of the operand, and may be independent of the instr
1146 /// itself. This can be useful for portably encoding the comment character
1147 /// or other bits of target-specific knowledge into the asmstrings. The
1148 /// syntax used is ${:comment}. Targets can override this to add support
1149 /// for their own strange codes.
1150 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) {
1151 if (!strcmp(Code, "private")) {
1152 O << TAI->getPrivateGlobalPrefix();
1153 } else if (!strcmp(Code, "comment")) {
1154 O << TAI->getCommentString();
1155 } else if (!strcmp(Code, "uid")) {
1156 // Assign a unique ID to this machine instruction.
1157 static const MachineInstr *LastMI = 0;
1158 static const Function *F = 0;
1159 static unsigned Counter = 0U-1;
1161 // Comparing the address of MI isn't sufficient, because machineinstrs may
1162 // be allocated to the same address across functions.
1163 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1165 // If this is a new machine instruction, bump the counter.
1166 if (LastMI != MI || F != ThisF) {
1173 cerr << "Unknown special formatter '" << Code
1174 << "' for machine instr: " << *MI;
1180 /// printInlineAsm - This method formats and prints the specified machine
1181 /// instruction that is an inline asm.
1182 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1183 unsigned NumOperands = MI->getNumOperands();
1185 // Count the number of register definitions.
1186 unsigned NumDefs = 0;
1187 for (; MI->getOperand(NumDefs).isRegister() && MI->getOperand(NumDefs).isDef();
1189 assert(NumDefs != NumOperands-1 && "No asm string?");
1191 assert(MI->getOperand(NumDefs).isExternalSymbol() && "No asm string?");
1193 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1194 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1196 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1197 // These are useful to see where empty asm's wound up.
1198 if (AsmStr[0] == 0) {
1199 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1203 O << TAI->getInlineAsmStart() << "\n\t";
1205 // The variant of the current asmprinter.
1206 int AsmPrinterVariant = TAI->getAssemblerDialect();
1208 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1209 const char *LastEmitted = AsmStr; // One past the last character emitted.
1211 while (*LastEmitted) {
1212 switch (*LastEmitted) {
1214 // Not a special case, emit the string section literally.
1215 const char *LiteralEnd = LastEmitted+1;
1216 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1217 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1219 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1220 O.write(LastEmitted, LiteralEnd-LastEmitted);
1221 LastEmitted = LiteralEnd;
1225 ++LastEmitted; // Consume newline character.
1226 O << '\n'; // Indent code with newline.
1229 ++LastEmitted; // Consume '$' character.
1233 switch (*LastEmitted) {
1234 default: Done = false; break;
1235 case '$': // $$ -> $
1236 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1238 ++LastEmitted; // Consume second '$' character.
1240 case '(': // $( -> same as GCC's { character.
1241 ++LastEmitted; // Consume '(' character.
1242 if (CurVariant != -1) {
1243 cerr << "Nested variants found in inline asm string: '"
1247 CurVariant = 0; // We're in the first variant now.
1250 ++LastEmitted; // consume '|' character.
1251 if (CurVariant == -1) {
1252 cerr << "Found '|' character outside of variant in inline asm "
1253 << "string: '" << AsmStr << "'\n";
1256 ++CurVariant; // We're in the next variant.
1258 case ')': // $) -> same as GCC's } char.
1259 ++LastEmitted; // consume ')' character.
1260 if (CurVariant == -1) {
1261 cerr << "Found '}' character outside of variant in inline asm "
1262 << "string: '" << AsmStr << "'\n";
1270 bool HasCurlyBraces = false;
1271 if (*LastEmitted == '{') { // ${variable}
1272 ++LastEmitted; // Consume '{' character.
1273 HasCurlyBraces = true;
1276 const char *IDStart = LastEmitted;
1279 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1280 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1281 cerr << "Bad $ operand number in inline asm string: '"
1285 LastEmitted = IDEnd;
1287 char Modifier[2] = { 0, 0 };
1289 if (HasCurlyBraces) {
1290 // If we have curly braces, check for a modifier character. This
1291 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1292 if (*LastEmitted == ':') {
1293 ++LastEmitted; // Consume ':' character.
1294 if (*LastEmitted == 0) {
1295 cerr << "Bad ${:} expression in inline asm string: '"
1300 Modifier[0] = *LastEmitted;
1301 ++LastEmitted; // Consume modifier character.
1304 if (*LastEmitted != '}') {
1305 cerr << "Bad ${} expression in inline asm string: '"
1309 ++LastEmitted; // Consume '}' character.
1312 if ((unsigned)Val >= NumOperands-1) {
1313 cerr << "Invalid $ operand number in inline asm string: '"
1318 // Okay, we finally have a value number. Ask the target to print this
1320 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1325 // Scan to find the machine operand number for the operand.
1326 for (; Val; --Val) {
1327 if (OpNo >= MI->getNumOperands()) break;
1328 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1329 OpNo += (OpFlags >> 3) + 1;
1332 if (OpNo >= MI->getNumOperands()) {
1335 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1336 ++OpNo; // Skip over the ID number.
1338 if (Modifier[0]=='l') // labels are target independent
1339 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1340 false, false, false);
1342 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1343 if ((OpFlags & 7) == 4) {
1344 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1345 Modifier[0] ? Modifier : 0);
1347 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1348 Modifier[0] ? Modifier : 0);
1353 cerr << "Invalid operand found in inline asm: '"
1363 O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1366 /// printImplicitDef - This method prints the specified machine instruction
1367 /// that is an implicit def.
1368 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1369 O << '\t' << TAI->getCommentString() << " implicit-def: "
1370 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1373 /// printLabel - This method prints a local label used by debug and
1374 /// exception handling tables.
1375 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1376 printLabel(MI->getOperand(0).getImm());
1379 void AsmPrinter::printLabel(unsigned Id) const {
1380 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1383 /// printDeclare - This method prints a local variable declaration used by
1385 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1386 /// entry into dwarf table.
1387 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1388 int FI = MI->getOperand(0).getIndex();
1389 GlobalValue *GV = MI->getOperand(1).getGlobal();
1390 MMI->RecordVariable(GV, FI);
1393 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1394 /// instruction, using the specified assembler variant. Targets should
1395 /// overried this to format as appropriate.
1396 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1397 unsigned AsmVariant, const char *ExtraCode) {
1398 // Target doesn't support this yet!
1402 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1403 unsigned AsmVariant,
1404 const char *ExtraCode) {
1405 // Target doesn't support this yet!
1409 /// printBasicBlockLabel - This method prints the label for the specified
1410 /// MachineBasicBlock
1411 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1414 bool printComment) const {
1416 unsigned Align = MBB->getAlignment();
1418 EmitAlignment(Log2_32(Align));
1421 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1422 << MBB->getNumber();
1425 if (printComment && MBB->getBasicBlock())
1426 O << '\t' << TAI->getCommentString() << ' '
1427 << MBB->getBasicBlock()->getNameStart();
1430 /// printPICJumpTableSetLabel - This method prints a set label for the
1431 /// specified MachineBasicBlock for a jumptable entry.
1432 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1433 const MachineBasicBlock *MBB) const {
1434 if (!TAI->getSetDirective())
1437 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1438 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1439 printBasicBlockLabel(MBB, false, false, false);
1440 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1441 << '_' << uid << '\n';
1444 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1445 const MachineBasicBlock *MBB) const {
1446 if (!TAI->getSetDirective())
1449 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1450 << getFunctionNumber() << '_' << uid << '_' << uid2
1451 << "_set_" << MBB->getNumber() << ',';
1452 printBasicBlockLabel(MBB, false, false, false);
1453 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1454 << '_' << uid << '_' << uid2 << '\n';
1457 /// printDataDirective - This method prints the asm directive for the
1459 void AsmPrinter::printDataDirective(const Type *type) {
1460 const TargetData *TD = TM.getTargetData();
1461 switch (type->getTypeID()) {
1462 case Type::IntegerTyID: {
1463 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1465 O << TAI->getData8bitsDirective();
1466 else if (BitWidth <= 16)
1467 O << TAI->getData16bitsDirective();
1468 else if (BitWidth <= 32)
1469 O << TAI->getData32bitsDirective();
1470 else if (BitWidth <= 64) {
1471 assert(TAI->getData64bitsDirective() &&
1472 "Target cannot handle 64-bit constant exprs!");
1473 O << TAI->getData64bitsDirective();
1475 assert(0 && "Target cannot handle given data directive width!");
1479 case Type::PointerTyID:
1480 if (TD->getPointerSize() == 8) {
1481 assert(TAI->getData64bitsDirective() &&
1482 "Target cannot handle 64-bit pointer exprs!");
1483 O << TAI->getData64bitsDirective();
1485 O << TAI->getData32bitsDirective();
1488 case Type::FloatTyID: case Type::DoubleTyID:
1489 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1490 assert (0 && "Should have already output floating point constant.");
1492 assert (0 && "Can't handle printing this type of thing");
1497 void AsmPrinter::printSuffixedName(const char *Name, const char *Suffix,
1498 const char *Prefix) {
1501 O << TAI->getPrivateGlobalPrefix();
1502 if (Prefix) O << Prefix;
1514 void AsmPrinter::printSuffixedName(const std::string &Name, const char* Suffix) {
1515 printSuffixedName(Name.c_str(), Suffix);
1518 void AsmPrinter::printVisibility(const std::string& Name,
1519 unsigned Visibility) const {
1520 if (Visibility == GlobalValue::HiddenVisibility) {
1521 if (const char *Directive = TAI->getHiddenDirective())
1522 O << Directive << Name << '\n';
1523 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1524 if (const char *Directive = TAI->getProtectedDirective())
1525 O << Directive << Name << '\n';
1529 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
1530 if (!S->usesMetadata())
1533 gcp_iterator GCPI = GCMetadataPrinters.find(S);
1534 if (GCPI != GCMetadataPrinters.end())
1535 return GCPI->second;
1537 const char *Name = S->getName().c_str();
1539 for (GCMetadataPrinterRegistry::iterator
1540 I = GCMetadataPrinterRegistry::begin(),
1541 E = GCMetadataPrinterRegistry::end(); I != E; ++I)
1542 if (strcmp(Name, I->getName()) == 0) {
1543 GCMetadataPrinter *GMP = I->instantiate();
1545 GCMetadataPrinters.insert(std::make_pair(S, GMP));
1549 cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";