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;
117 CurrentSection_ = NS;
119 if (!CurrentSection.empty()) {
120 // If section is named we need to switch into it via special '.section'
121 // directive and also append funky flags. Otherwise - section name is just
122 // some magic assembler directive.
124 O << TAI->getSwitchToSectionDirective()
126 << TAI->getSectionFlags(NS->getFlags());
129 O << TAI->getDataSectionStartSuffix() << '\n';
132 IsInTextSection = (NS->getFlags() & SectionFlags::Code);
135 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
136 MachineFunctionPass::getAnalysisUsage(AU);
137 AU.addRequired<GCModuleInfo>();
140 bool AsmPrinter::doInitialization(Module &M) {
141 Mang = new Mangler(M, TAI->getGlobalPrefix());
143 GCModuleInfo *MI = getAnalysisToUpdate<GCModuleInfo>();
144 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
145 for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
146 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
147 MP->beginAssembly(O, *this, *TAI);
149 if (!M.getModuleInlineAsm().empty())
150 O << TAI->getCommentString() << " Start of file scope inline assembly\n"
151 << M.getModuleInlineAsm()
152 << '\n' << TAI->getCommentString()
153 << " End of file scope inline assembly\n";
155 SwitchToDataSection(""); // Reset back to no section.
157 MMI = getAnalysisToUpdate<MachineModuleInfo>();
158 if (MMI) MMI->AnalyzeModule(M);
163 bool AsmPrinter::doFinalization(Module &M) {
164 if (TAI->getWeakRefDirective()) {
165 if (!ExtWeakSymbols.empty())
166 SwitchToDataSection("");
168 for (std::set<const GlobalValue*>::iterator i = ExtWeakSymbols.begin(),
169 e = ExtWeakSymbols.end(); i != e; ++i) {
170 const GlobalValue *GV = *i;
171 std::string Name = Mang->getValueName(GV);
172 O << TAI->getWeakRefDirective() << Name << '\n';
176 if (TAI->getSetDirective()) {
177 if (!M.alias_empty())
178 SwitchToSection(TAI->getTextSection());
181 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
183 std::string Name = Mang->getValueName(I);
186 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
187 Target = Mang->getValueName(GV);
189 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
190 O << "\t.globl\t" << Name << '\n';
191 else if (I->hasWeakLinkage())
192 O << TAI->getWeakRefDirective() << Name << '\n';
193 else if (!I->hasInternalLinkage())
194 assert(0 && "Invalid alias linkage");
196 if (I->hasHiddenVisibility()) {
197 if (const char *Directive = TAI->getHiddenDirective())
198 O << Directive << Name << '\n';
199 } else if (I->hasProtectedVisibility()) {
200 if (const char *Directive = TAI->getProtectedDirective())
201 O << Directive << Name << '\n';
204 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
206 // If the aliasee has external weak linkage it can be referenced only by
207 // alias itself. In this case it can be not in ExtWeakSymbols list. Emit
208 // weak reference in such case.
209 if (GV->hasExternalWeakLinkage()) {
210 if (TAI->getWeakRefDirective())
211 O << TAI->getWeakRefDirective() << Target << '\n';
213 O << "\t.globl\t" << Target << '\n';
218 GCModuleInfo *MI = getAnalysisToUpdate<GCModuleInfo>();
219 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
220 for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
221 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
222 MP->finishAssembly(O, *this, *TAI);
224 // If we don't have any trampolines, then we don't require stack memory
225 // to be executable. Some targets have a directive to declare this.
226 Function* InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
227 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
228 if (TAI->getNonexecutableStackDirective())
229 O << TAI->getNonexecutableStackDirective() << '\n';
231 delete Mang; Mang = 0;
235 std::string AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) {
236 assert(MF && "No machine function?");
237 std::string Name = MF->getFunction()->getName();
239 Name = Mang->getValueName(MF->getFunction());
240 return Mang->makeNameProper(Name + ".eh", TAI->getGlobalPrefix());
243 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
244 // What's my mangled name?
245 CurrentFnName = Mang->getValueName(MF.getFunction());
246 IncrementFunctionNumber();
249 /// EmitConstantPool - Print to the current output stream assembly
250 /// representations of the constants in the constant pool MCP. This is
251 /// used to print out constants which have been "spilled to memory" by
252 /// the code generator.
254 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
255 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
256 if (CP.empty()) return;
258 // Some targets require 4-, 8-, and 16- byte constant literals to be placed
259 // in special sections.
260 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > FourByteCPs;
261 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > EightByteCPs;
262 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > SixteenByteCPs;
263 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > OtherCPs;
264 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > TargetCPs;
265 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
266 MachineConstantPoolEntry CPE = CP[i];
267 const Type *Ty = CPE.getType();
268 if (TAI->getFourByteConstantSection() &&
269 TM.getTargetData()->getABITypeSize(Ty) == 4)
270 FourByteCPs.push_back(std::make_pair(CPE, i));
271 else if (TAI->getEightByteConstantSection() &&
272 TM.getTargetData()->getABITypeSize(Ty) == 8)
273 EightByteCPs.push_back(std::make_pair(CPE, i));
274 else if (TAI->getSixteenByteConstantSection() &&
275 TM.getTargetData()->getABITypeSize(Ty) == 16)
276 SixteenByteCPs.push_back(std::make_pair(CPE, i));
278 OtherCPs.push_back(std::make_pair(CPE, i));
281 unsigned Alignment = MCP->getConstantPoolAlignment();
282 EmitConstantPool(Alignment, TAI->getFourByteConstantSection(), FourByteCPs);
283 EmitConstantPool(Alignment, TAI->getEightByteConstantSection(), EightByteCPs);
284 EmitConstantPool(Alignment, TAI->getSixteenByteConstantSection(),
286 EmitConstantPool(Alignment, TAI->getConstantPoolSection(), OtherCPs);
289 void AsmPrinter::EmitConstantPool(unsigned Alignment, const char *Section,
290 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > &CP) {
291 if (CP.empty()) return;
293 SwitchToDataSection(Section);
294 EmitAlignment(Alignment);
295 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
296 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
297 << CP[i].second << ":\t\t\t\t\t";
298 // O << TAI->getCommentString() << ' ' <<
299 // WriteTypeSymbolic(O, CP[i].first.getType(), 0);
301 if (CP[i].first.isMachineConstantPoolEntry())
302 EmitMachineConstantPoolValue(CP[i].first.Val.MachineCPVal);
304 EmitGlobalConstant(CP[i].first.Val.ConstVal);
306 const Type *Ty = CP[i].first.getType();
308 TM.getTargetData()->getABITypeSize(Ty);
309 unsigned ValEnd = CP[i].first.getOffset() + EntSize;
310 // Emit inter-object padding for alignment.
311 EmitZeros(CP[i+1].first.getOffset()-ValEnd);
316 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
317 /// by the current function to the current output stream.
319 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
320 MachineFunction &MF) {
321 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
322 if (JT.empty()) return;
324 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
326 // Pick the directive to use to print the jump table entries, and switch to
327 // the appropriate section.
328 TargetLowering *LoweringInfo = TM.getTargetLowering();
330 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
331 const Function *F = MF.getFunction();
332 unsigned SectionFlags = TAI->SectionFlagsForGlobal(F);
333 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
334 !JumpTableDataSection ||
335 SectionFlags & SectionFlags::Linkonce) {
336 // In PIC mode, we need to emit the jump table to the same section as the
337 // function body itself, otherwise the label differences won't make sense.
338 // We should also do if the section name is NULL or function is declared in
339 // discardable section.
340 SwitchToSection(TAI->SectionForGlobal(F));
342 SwitchToDataSection(JumpTableDataSection);
345 EmitAlignment(Log2_32(MJTI->getAlignment()));
347 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
348 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
350 // If this jump table was deleted, ignore it.
351 if (JTBBs.empty()) continue;
353 // For PIC codegen, if possible we want to use the SetDirective to reduce
354 // the number of relocations the assembler will generate for the jump table.
355 // Set directives are all printed before the jump table itself.
356 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
357 if (TAI->getSetDirective() && IsPic)
358 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
359 if (EmittedSets.insert(JTBBs[ii]))
360 printPICJumpTableSetLabel(i, JTBBs[ii]);
362 // On some targets (e.g. darwin) we want to emit two consequtive labels
363 // before each jump table. The first label is never referenced, but tells
364 // the assembler and linker the extents of the jump table object. The
365 // second label is actually referenced by the code.
366 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
367 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
369 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
370 << '_' << i << ":\n";
372 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
373 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
379 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
380 const MachineBasicBlock *MBB,
381 unsigned uid) const {
382 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
384 // Use JumpTableDirective otherwise honor the entry size from the jump table
386 const char *JTEntryDirective = TAI->getJumpTableDirective();
387 bool HadJTEntryDirective = JTEntryDirective != NULL;
388 if (!HadJTEntryDirective) {
389 JTEntryDirective = MJTI->getEntrySize() == 4 ?
390 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
393 O << JTEntryDirective << ' ';
395 // If we have emitted set directives for the jump table entries, print
396 // them rather than the entries themselves. If we're emitting PIC, then
397 // emit the table entries as differences between two text section labels.
398 // If we're emitting non-PIC code, then emit the entries as direct
399 // references to the target basic blocks.
401 if (TAI->getSetDirective()) {
402 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
403 << '_' << uid << "_set_" << MBB->getNumber();
405 printBasicBlockLabel(MBB, false, false, false);
406 // If the arch uses custom Jump Table directives, don't calc relative to
408 if (!HadJTEntryDirective)
409 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
410 << getFunctionNumber() << '_' << uid;
413 printBasicBlockLabel(MBB, false, false, false);
418 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
419 /// special global used by LLVM. If so, emit it and return true, otherwise
420 /// do nothing and return false.
421 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
422 if (GV->getName() == "llvm.used") {
423 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
424 EmitLLVMUsedList(GV->getInitializer());
428 // Ignore debug and non-emitted data.
429 if (GV->getSection() == "llvm.metadata") return true;
431 if (!GV->hasAppendingLinkage()) return false;
433 assert(GV->hasInitializer() && "Not a special LLVM global!");
435 const TargetData *TD = TM.getTargetData();
436 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
437 if (GV->getName() == "llvm.global_ctors" && GV->use_empty()) {
438 SwitchToDataSection(TAI->getStaticCtorsSection());
439 EmitAlignment(Align, 0);
440 EmitXXStructorList(GV->getInitializer());
444 if (GV->getName() == "llvm.global_dtors" && GV->use_empty()) {
445 SwitchToDataSection(TAI->getStaticDtorsSection());
446 EmitAlignment(Align, 0);
447 EmitXXStructorList(GV->getInitializer());
454 /// findGlobalValue - if CV is an expression equivalent to a single
455 /// global value, return that value.
456 const GlobalValue * AsmPrinter::findGlobalValue(const Constant *CV) {
457 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
459 else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
460 const TargetData *TD = TM.getTargetData();
461 unsigned Opcode = CE->getOpcode();
463 case Instruction::GetElementPtr: {
464 const Constant *ptrVal = CE->getOperand(0);
465 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
466 if (TD->getIndexedOffset(ptrVal->getType(), &idxVec[0], idxVec.size()))
468 return findGlobalValue(ptrVal);
470 case Instruction::BitCast:
471 return findGlobalValue(CE->getOperand(0));
479 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
480 /// global in the specified llvm.used list for which emitUsedDirectiveFor
481 /// is true, as being used with this directive.
483 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
484 const char *Directive = TAI->getUsedDirective();
486 // Should be an array of 'sbyte*'.
487 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
488 if (InitList == 0) return;
490 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
491 const GlobalValue *GV = findGlobalValue(InitList->getOperand(i));
492 if (TAI->emitUsedDirectiveFor(GV, Mang)) {
494 EmitConstantValueOnly(InitList->getOperand(i));
500 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
501 /// function pointers, ignoring the init priority.
502 void AsmPrinter::EmitXXStructorList(Constant *List) {
503 // Should be an array of '{ int, void ()* }' structs. The first value is the
504 // init priority, which we ignore.
505 if (!isa<ConstantArray>(List)) return;
506 ConstantArray *InitList = cast<ConstantArray>(List);
507 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
508 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
509 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
511 if (CS->getOperand(1)->isNullValue())
512 return; // Found a null terminator, exit printing.
513 // Emit the function pointer.
514 EmitGlobalConstant(CS->getOperand(1));
518 /// getGlobalLinkName - Returns the asm/link name of of the specified
519 /// global variable. Should be overridden by each target asm printer to
520 /// generate the appropriate value.
521 const std::string AsmPrinter::getGlobalLinkName(const GlobalVariable *GV) const{
522 std::string LinkName;
524 if (isa<Function>(GV)) {
525 LinkName += TAI->getFunctionAddrPrefix();
526 LinkName += Mang->getValueName(GV);
527 LinkName += TAI->getFunctionAddrSuffix();
529 LinkName += TAI->getGlobalVarAddrPrefix();
530 LinkName += Mang->getValueName(GV);
531 LinkName += TAI->getGlobalVarAddrSuffix();
537 /// EmitExternalGlobal - Emit the external reference to a global variable.
538 /// Should be overridden if an indirect reference should be used.
539 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
540 O << getGlobalLinkName(GV);
545 //===----------------------------------------------------------------------===//
546 /// LEB 128 number encoding.
548 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
549 /// representing an unsigned leb128 value.
550 void AsmPrinter::PrintULEB128(unsigned Value) const {
552 unsigned Byte = Value & 0x7f;
554 if (Value) Byte |= 0x80;
555 O << "0x" << utohexstr(Byte);
556 if (Value) O << ", ";
560 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
561 /// representing a signed leb128 value.
562 void AsmPrinter::PrintSLEB128(int Value) const {
563 int Sign = Value >> (8 * sizeof(Value) - 1);
567 unsigned Byte = Value & 0x7f;
569 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
570 if (IsMore) Byte |= 0x80;
571 O << "0x" << utohexstr(Byte);
572 if (IsMore) O << ", ";
576 //===--------------------------------------------------------------------===//
577 // Emission and print routines
580 /// PrintHex - Print a value as a hexidecimal value.
582 void AsmPrinter::PrintHex(int Value) const {
583 O << "0x" << utohexstr(static_cast<unsigned>(Value));
586 /// EOL - Print a newline character to asm stream. If a comment is present
587 /// then it will be printed first. Comments should not contain '\n'.
588 void AsmPrinter::EOL() const {
592 void AsmPrinter::EOL(const std::string &Comment) const {
593 if (VerboseAsm && !Comment.empty()) {
595 << TAI->getCommentString()
602 void AsmPrinter::EOL(const char* Comment) const {
603 if (VerboseAsm && *Comment) {
605 << TAI->getCommentString()
612 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
613 /// unsigned leb128 value.
614 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
615 if (TAI->hasLEB128()) {
619 O << TAI->getData8bitsDirective();
624 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
625 /// signed leb128 value.
626 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
627 if (TAI->hasLEB128()) {
631 O << TAI->getData8bitsDirective();
636 /// EmitInt8 - Emit a byte directive and value.
638 void AsmPrinter::EmitInt8(int Value) const {
639 O << TAI->getData8bitsDirective();
640 PrintHex(Value & 0xFF);
643 /// EmitInt16 - Emit a short directive and value.
645 void AsmPrinter::EmitInt16(int Value) const {
646 O << TAI->getData16bitsDirective();
647 PrintHex(Value & 0xFFFF);
650 /// EmitInt32 - Emit a long directive and value.
652 void AsmPrinter::EmitInt32(int Value) const {
653 O << TAI->getData32bitsDirective();
657 /// EmitInt64 - Emit a long long directive and value.
659 void AsmPrinter::EmitInt64(uint64_t Value) const {
660 if (TAI->getData64bitsDirective()) {
661 O << TAI->getData64bitsDirective();
664 if (TM.getTargetData()->isBigEndian()) {
665 EmitInt32(unsigned(Value >> 32)); O << '\n';
666 EmitInt32(unsigned(Value));
668 EmitInt32(unsigned(Value)); O << '\n';
669 EmitInt32(unsigned(Value >> 32));
674 /// toOctal - Convert the low order bits of X into an octal digit.
676 static inline char toOctal(int X) {
680 /// printStringChar - Print a char, escaped if necessary.
682 static void printStringChar(raw_ostream &O, char C) {
685 } else if (C == '\\') {
687 } else if (isprint(C)) {
691 case '\b': O << "\\b"; break;
692 case '\f': O << "\\f"; break;
693 case '\n': O << "\\n"; break;
694 case '\r': O << "\\r"; break;
695 case '\t': O << "\\t"; break;
698 O << toOctal(C >> 6);
699 O << toOctal(C >> 3);
700 O << toOctal(C >> 0);
706 /// EmitString - Emit a string with quotes and a null terminator.
707 /// Special characters are emitted properly.
708 /// \literal (Eg. '\t') \endliteral
709 void AsmPrinter::EmitString(const std::string &String) const {
710 const char* AscizDirective = TAI->getAscizDirective();
714 O << TAI->getAsciiDirective();
716 for (unsigned i = 0, N = String.size(); i < N; ++i) {
717 unsigned char C = String[i];
718 printStringChar(O, C);
727 /// EmitFile - Emit a .file directive.
728 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
729 O << "\t.file\t" << Number << " \"";
730 for (unsigned i = 0, N = Name.size(); i < N; ++i) {
731 unsigned char C = Name[i];
732 printStringChar(O, C);
738 //===----------------------------------------------------------------------===//
740 // EmitAlignment - Emit an alignment directive to the specified power of
741 // two boundary. For example, if you pass in 3 here, you will get an 8
742 // byte alignment. If a global value is specified, and if that global has
743 // an explicit alignment requested, it will unconditionally override the
744 // alignment request. However, if ForcedAlignBits is specified, this value
745 // has final say: the ultimate alignment will be the max of ForcedAlignBits
746 // and the alignment computed with NumBits and the global.
750 // if (GV && GV->hasalignment) Align = GV->getalignment();
751 // Align = std::max(Align, ForcedAlignBits);
753 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
754 unsigned ForcedAlignBits,
755 bool UseFillExpr) const {
756 if (GV && GV->getAlignment())
757 NumBits = Log2_32(GV->getAlignment());
758 NumBits = std::max(NumBits, ForcedAlignBits);
760 if (NumBits == 0) return; // No need to emit alignment.
761 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
762 O << TAI->getAlignDirective() << NumBits;
764 unsigned FillValue = TAI->getTextAlignFillValue();
765 UseFillExpr &= IsInTextSection && FillValue;
766 if (UseFillExpr) O << ",0x" << utohexstr(FillValue);
771 /// EmitZeros - Emit a block of zeros.
773 void AsmPrinter::EmitZeros(uint64_t NumZeros) const {
775 if (TAI->getZeroDirective()) {
776 O << TAI->getZeroDirective() << NumZeros;
777 if (TAI->getZeroDirectiveSuffix())
778 O << TAI->getZeroDirectiveSuffix();
781 for (; NumZeros; --NumZeros)
782 O << TAI->getData8bitsDirective() << "0\n";
787 // Print out the specified constant, without a storage class. Only the
788 // constants valid in constant expressions can occur here.
789 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
790 if (CV->isNullValue() || isa<UndefValue>(CV))
792 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
793 O << CI->getZExtValue();
794 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
795 // This is a constant address for a global variable or function. Use the
796 // name of the variable or function as the address value, possibly
797 // decorating it with GlobalVarAddrPrefix/Suffix or
798 // FunctionAddrPrefix/Suffix (these all default to "" )
799 if (isa<Function>(GV)) {
800 O << TAI->getFunctionAddrPrefix()
801 << Mang->getValueName(GV)
802 << TAI->getFunctionAddrSuffix();
804 O << TAI->getGlobalVarAddrPrefix()
805 << Mang->getValueName(GV)
806 << TAI->getGlobalVarAddrSuffix();
808 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
809 const TargetData *TD = TM.getTargetData();
810 unsigned Opcode = CE->getOpcode();
812 case Instruction::GetElementPtr: {
813 // generate a symbolic expression for the byte address
814 const Constant *ptrVal = CE->getOperand(0);
815 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
816 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
820 EmitConstantValueOnly(ptrVal);
822 O << ") + " << Offset;
824 O << ") - " << -Offset;
826 EmitConstantValueOnly(ptrVal);
830 case Instruction::Trunc:
831 case Instruction::ZExt:
832 case Instruction::SExt:
833 case Instruction::FPTrunc:
834 case Instruction::FPExt:
835 case Instruction::UIToFP:
836 case Instruction::SIToFP:
837 case Instruction::FPToUI:
838 case Instruction::FPToSI:
839 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
841 case Instruction::BitCast:
842 return EmitConstantValueOnly(CE->getOperand(0));
844 case Instruction::IntToPtr: {
845 // Handle casts to pointers by changing them into casts to the appropriate
846 // integer type. This promotes constant folding and simplifies this code.
847 Constant *Op = CE->getOperand(0);
848 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
849 return EmitConstantValueOnly(Op);
853 case Instruction::PtrToInt: {
854 // Support only foldable casts to/from pointers that can be eliminated by
855 // changing the pointer to the appropriately sized integer type.
856 Constant *Op = CE->getOperand(0);
857 const Type *Ty = CE->getType();
859 // We can emit the pointer value into this slot if the slot is an
860 // integer slot greater or equal to the size of the pointer.
861 if (TD->getABITypeSize(Ty) >= TD->getABITypeSize(Op->getType()))
862 return EmitConstantValueOnly(Op);
865 EmitConstantValueOnly(Op);
866 APInt ptrMask = APInt::getAllOnesValue(TD->getABITypeSizeInBits(Ty));
869 ptrMask.toStringUnsigned(S);
870 O << ") & " << S.c_str() << ')';
873 case Instruction::Add:
874 case Instruction::Sub:
875 case Instruction::And:
876 case Instruction::Or:
877 case Instruction::Xor:
879 EmitConstantValueOnly(CE->getOperand(0));
882 case Instruction::Add:
885 case Instruction::Sub:
888 case Instruction::And:
891 case Instruction::Or:
894 case Instruction::Xor:
901 EmitConstantValueOnly(CE->getOperand(1));
905 assert(0 && "Unsupported operator!");
908 assert(0 && "Unknown constant value!");
912 /// printAsCString - Print the specified array as a C compatible string, only if
913 /// the predicate isString is true.
915 static void printAsCString(raw_ostream &O, const ConstantArray *CVA,
917 assert(CVA->isString() && "Array is not string compatible!");
920 for (unsigned i = 0; i != LastElt; ++i) {
922 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
923 printStringChar(O, C);
928 /// EmitString - Emit a zero-byte-terminated string constant.
930 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
931 unsigned NumElts = CVA->getNumOperands();
932 if (TAI->getAscizDirective() && NumElts &&
933 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
934 O << TAI->getAscizDirective();
935 printAsCString(O, CVA, NumElts-1);
937 O << TAI->getAsciiDirective();
938 printAsCString(O, CVA, NumElts);
943 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
944 void AsmPrinter::EmitGlobalConstant(const Constant *CV) {
945 const TargetData *TD = TM.getTargetData();
946 unsigned Size = TD->getABITypeSize(CV->getType());
948 if (CV->isNullValue() || isa<UndefValue>(CV)) {
951 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
952 if (CVA->isString()) {
954 } else { // Not a string. Print the values in successive locations
955 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
956 EmitGlobalConstant(CVA->getOperand(i));
959 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
960 // Print the fields in successive locations. Pad to align if needed!
961 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
962 uint64_t sizeSoFar = 0;
963 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
964 const Constant* field = CVS->getOperand(i);
966 // Check if padding is needed and insert one or more 0s.
967 uint64_t fieldSize = TD->getABITypeSize(field->getType());
968 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
969 - cvsLayout->getElementOffset(i)) - fieldSize;
970 sizeSoFar += fieldSize + padSize;
972 // Now print the actual field value.
973 EmitGlobalConstant(field);
975 // Insert padding - this may include padding to increase the size of the
976 // current field up to the ABI size (if the struct is not packed) as well
977 // as padding to ensure that the next field starts at the right offset.
980 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
981 "Layout of constant struct may be incorrect!");
983 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
984 // FP Constants are printed as integer constants to avoid losing
986 if (CFP->getType() == Type::DoubleTy) {
987 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
988 uint64_t i = CFP->getValueAPF().convertToAPInt().getZExtValue();
989 if (TAI->getData64bitsDirective())
990 O << TAI->getData64bitsDirective() << i << '\t'
991 << TAI->getCommentString() << " double value: " << Val << '\n';
992 else if (TD->isBigEndian()) {
993 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
994 << '\t' << TAI->getCommentString()
995 << " double most significant word " << Val << '\n';
996 O << TAI->getData32bitsDirective() << unsigned(i)
997 << '\t' << TAI->getCommentString()
998 << " double least significant word " << Val << '\n';
1000 O << TAI->getData32bitsDirective() << unsigned(i)
1001 << '\t' << TAI->getCommentString()
1002 << " double least significant word " << Val << '\n';
1003 O << TAI->getData32bitsDirective() << unsigned(i >> 32)
1004 << '\t' << TAI->getCommentString()
1005 << " double most significant word " << Val << '\n';
1008 } else if (CFP->getType() == Type::FloatTy) {
1009 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
1010 O << TAI->getData32bitsDirective()
1011 << CFP->getValueAPF().convertToAPInt().getZExtValue()
1012 << '\t' << TAI->getCommentString() << " float " << Val << '\n';
1014 } else if (CFP->getType() == Type::X86_FP80Ty) {
1015 // all long double variants are printed as hex
1016 // api needed to prevent premature destruction
1017 APInt api = CFP->getValueAPF().convertToAPInt();
1018 const uint64_t *p = api.getRawData();
1019 APFloat DoubleVal = CFP->getValueAPF();
1020 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven);
1021 if (TD->isBigEndian()) {
1022 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
1023 << '\t' << TAI->getCommentString()
1024 << " long double most significant halfword of ~"
1025 << DoubleVal.convertToDouble() << '\n';
1026 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
1027 << '\t' << TAI->getCommentString()
1028 << " long double next halfword\n";
1029 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
1030 << '\t' << TAI->getCommentString()
1031 << " long double next halfword\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[1])
1036 << '\t' << TAI->getCommentString()
1037 << " long double least significant halfword\n";
1039 O << TAI->getData16bitsDirective() << uint16_t(p[1])
1040 << '\t' << TAI->getCommentString()
1041 << " long double least significant halfword of ~"
1042 << DoubleVal.convertToDouble() << '\n';
1043 O << TAI->getData16bitsDirective() << uint16_t(p[0])
1044 << '\t' << TAI->getCommentString()
1045 << " long double next halfword\n";
1046 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 16)
1047 << '\t' << TAI->getCommentString()
1048 << " long double next halfword\n";
1049 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 32)
1050 << '\t' << TAI->getCommentString()
1051 << " long double next halfword\n";
1052 O << TAI->getData16bitsDirective() << uint16_t(p[0] >> 48)
1053 << '\t' << TAI->getCommentString()
1054 << " long double most significant halfword\n";
1056 EmitZeros(Size - TD->getTypeStoreSize(Type::X86_FP80Ty));
1058 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1059 // all long double variants are printed as hex
1060 // api needed to prevent premature destruction
1061 APInt api = CFP->getValueAPF().convertToAPInt();
1062 const uint64_t *p = api.getRawData();
1063 if (TD->isBigEndian()) {
1064 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1065 << '\t' << TAI->getCommentString()
1066 << " long double most significant word\n";
1067 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1068 << '\t' << TAI->getCommentString()
1069 << " long double next word\n";
1070 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1071 << '\t' << TAI->getCommentString()
1072 << " long double next word\n";
1073 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1074 << '\t' << TAI->getCommentString()
1075 << " long double least significant word\n";
1077 O << TAI->getData32bitsDirective() << uint32_t(p[1])
1078 << '\t' << TAI->getCommentString()
1079 << " long double least significant word\n";
1080 O << TAI->getData32bitsDirective() << uint32_t(p[1] >> 32)
1081 << '\t' << TAI->getCommentString()
1082 << " long double next word\n";
1083 O << TAI->getData32bitsDirective() << uint32_t(p[0])
1084 << '\t' << TAI->getCommentString()
1085 << " long double next word\n";
1086 O << TAI->getData32bitsDirective() << uint32_t(p[0] >> 32)
1087 << '\t' << TAI->getCommentString()
1088 << " long double most significant word\n";
1091 } else assert(0 && "Floating point constant type not handled");
1092 } else if (CV->getType()->isInteger() &&
1093 cast<IntegerType>(CV->getType())->getBitWidth() >= 64) {
1094 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1095 unsigned BitWidth = CI->getBitWidth();
1096 assert(isPowerOf2_32(BitWidth) &&
1097 "Non-power-of-2-sized integers not handled!");
1099 // We don't expect assemblers to support integer data directives
1100 // for more than 64 bits, so we emit the data in at most 64-bit
1101 // quantities at a time.
1102 const uint64_t *RawData = CI->getValue().getRawData();
1103 for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
1105 if (TD->isBigEndian())
1106 Val = RawData[e - i - 1];
1110 if (TAI->getData64bitsDirective())
1111 O << TAI->getData64bitsDirective() << Val << '\n';
1112 else if (TD->isBigEndian()) {
1113 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1114 << '\t' << TAI->getCommentString()
1115 << " Double-word most significant word " << Val << '\n';
1116 O << TAI->getData32bitsDirective() << unsigned(Val)
1117 << '\t' << TAI->getCommentString()
1118 << " Double-word least significant word " << Val << '\n';
1120 O << TAI->getData32bitsDirective() << unsigned(Val)
1121 << '\t' << TAI->getCommentString()
1122 << " Double-word least significant word " << Val << '\n';
1123 O << TAI->getData32bitsDirective() << unsigned(Val >> 32)
1124 << '\t' << TAI->getCommentString()
1125 << " Double-word most significant word " << Val << '\n';
1130 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1131 const VectorType *PTy = CP->getType();
1133 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
1134 EmitGlobalConstant(CP->getOperand(I));
1139 const Type *type = CV->getType();
1140 printDataDirective(type);
1141 EmitConstantValueOnly(CV);
1142 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1144 CI->getValue().toStringUnsigned(S, 16);
1145 O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
1150 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1151 // Target doesn't support this yet!
1155 /// PrintSpecial - Print information related to the specified machine instr
1156 /// that is independent of the operand, and may be independent of the instr
1157 /// itself. This can be useful for portably encoding the comment character
1158 /// or other bits of target-specific knowledge into the asmstrings. The
1159 /// syntax used is ${:comment}. Targets can override this to add support
1160 /// for their own strange codes.
1161 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) {
1162 if (!strcmp(Code, "private")) {
1163 O << TAI->getPrivateGlobalPrefix();
1164 } else if (!strcmp(Code, "comment")) {
1165 O << TAI->getCommentString();
1166 } else if (!strcmp(Code, "uid")) {
1167 // Assign a unique ID to this machine instruction.
1168 static const MachineInstr *LastMI = 0;
1169 static const Function *F = 0;
1170 static unsigned Counter = 0U-1;
1172 // Comparing the address of MI isn't sufficient, because machineinstrs may
1173 // be allocated to the same address across functions.
1174 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1176 // If this is a new machine instruction, bump the counter.
1177 if (LastMI != MI || F != ThisF) {
1184 cerr << "Unknown special formatter '" << Code
1185 << "' for machine instr: " << *MI;
1191 /// printInlineAsm - This method formats and prints the specified machine
1192 /// instruction that is an inline asm.
1193 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1194 unsigned NumOperands = MI->getNumOperands();
1196 // Count the number of register definitions.
1197 unsigned NumDefs = 0;
1198 for (; MI->getOperand(NumDefs).isRegister() && MI->getOperand(NumDefs).isDef();
1200 assert(NumDefs != NumOperands-1 && "No asm string?");
1202 assert(MI->getOperand(NumDefs).isExternalSymbol() && "No asm string?");
1204 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1205 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1207 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1208 // These are useful to see where empty asm's wound up.
1209 if (AsmStr[0] == 0) {
1210 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1214 O << TAI->getInlineAsmStart() << "\n\t";
1216 // The variant of the current asmprinter.
1217 int AsmPrinterVariant = TAI->getAssemblerDialect();
1219 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1220 const char *LastEmitted = AsmStr; // One past the last character emitted.
1222 while (*LastEmitted) {
1223 switch (*LastEmitted) {
1225 // Not a special case, emit the string section literally.
1226 const char *LiteralEnd = LastEmitted+1;
1227 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1228 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1230 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1231 O.write(LastEmitted, LiteralEnd-LastEmitted);
1232 LastEmitted = LiteralEnd;
1236 ++LastEmitted; // Consume newline character.
1237 O << '\n'; // Indent code with newline.
1240 ++LastEmitted; // Consume '$' character.
1244 switch (*LastEmitted) {
1245 default: Done = false; break;
1246 case '$': // $$ -> $
1247 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1249 ++LastEmitted; // Consume second '$' character.
1251 case '(': // $( -> same as GCC's { character.
1252 ++LastEmitted; // Consume '(' character.
1253 if (CurVariant != -1) {
1254 cerr << "Nested variants found in inline asm string: '"
1258 CurVariant = 0; // We're in the first variant now.
1261 ++LastEmitted; // consume '|' character.
1262 if (CurVariant == -1) {
1263 cerr << "Found '|' character outside of variant in inline asm "
1264 << "string: '" << AsmStr << "'\n";
1267 ++CurVariant; // We're in the next variant.
1269 case ')': // $) -> same as GCC's } char.
1270 ++LastEmitted; // consume ')' character.
1271 if (CurVariant == -1) {
1272 cerr << "Found '}' character outside of variant in inline asm "
1273 << "string: '" << AsmStr << "'\n";
1281 bool HasCurlyBraces = false;
1282 if (*LastEmitted == '{') { // ${variable}
1283 ++LastEmitted; // Consume '{' character.
1284 HasCurlyBraces = true;
1287 const char *IDStart = LastEmitted;
1290 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1291 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1292 cerr << "Bad $ operand number in inline asm string: '"
1296 LastEmitted = IDEnd;
1298 char Modifier[2] = { 0, 0 };
1300 if (HasCurlyBraces) {
1301 // If we have curly braces, check for a modifier character. This
1302 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1303 if (*LastEmitted == ':') {
1304 ++LastEmitted; // Consume ':' character.
1305 if (*LastEmitted == 0) {
1306 cerr << "Bad ${:} expression in inline asm string: '"
1311 Modifier[0] = *LastEmitted;
1312 ++LastEmitted; // Consume modifier character.
1315 if (*LastEmitted != '}') {
1316 cerr << "Bad ${} expression in inline asm string: '"
1320 ++LastEmitted; // Consume '}' character.
1323 if ((unsigned)Val >= NumOperands-1) {
1324 cerr << "Invalid $ operand number in inline asm string: '"
1329 // Okay, we finally have a value number. Ask the target to print this
1331 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1336 // Scan to find the machine operand number for the operand.
1337 for (; Val; --Val) {
1338 if (OpNo >= MI->getNumOperands()) break;
1339 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1340 OpNo += (OpFlags >> 3) + 1;
1343 if (OpNo >= MI->getNumOperands()) {
1346 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1347 ++OpNo; // Skip over the ID number.
1349 if (Modifier[0]=='l') // labels are target independent
1350 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1351 false, false, false);
1353 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1354 if ((OpFlags & 7) == 4) {
1355 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1356 Modifier[0] ? Modifier : 0);
1358 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1359 Modifier[0] ? Modifier : 0);
1364 cerr << "Invalid operand found in inline asm: '"
1374 O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1377 /// printImplicitDef - This method prints the specified machine instruction
1378 /// that is an implicit def.
1379 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1380 O << '\t' << TAI->getCommentString() << " implicit-def: "
1381 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1384 /// printLabel - This method prints a local label used by debug and
1385 /// exception handling tables.
1386 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1387 printLabel(MI->getOperand(0).getImm());
1390 void AsmPrinter::printLabel(unsigned Id) const {
1391 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1394 /// printDeclare - This method prints a local variable declaration used by
1396 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1397 /// entry into dwarf table.
1398 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1399 int FI = MI->getOperand(0).getIndex();
1400 GlobalValue *GV = MI->getOperand(1).getGlobal();
1401 MMI->RecordVariable(GV, FI);
1404 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1405 /// instruction, using the specified assembler variant. Targets should
1406 /// overried this to format as appropriate.
1407 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1408 unsigned AsmVariant, const char *ExtraCode) {
1409 // Target doesn't support this yet!
1413 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1414 unsigned AsmVariant,
1415 const char *ExtraCode) {
1416 // Target doesn't support this yet!
1420 /// printBasicBlockLabel - This method prints the label for the specified
1421 /// MachineBasicBlock
1422 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1425 bool printComment) const {
1427 unsigned Align = MBB->getAlignment();
1429 EmitAlignment(Log2_32(Align));
1432 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1433 << MBB->getNumber();
1436 if (printComment && MBB->getBasicBlock())
1437 O << '\t' << TAI->getCommentString() << ' '
1438 << MBB->getBasicBlock()->getNameStart();
1441 /// printPICJumpTableSetLabel - This method prints a set label for the
1442 /// specified MachineBasicBlock for a jumptable entry.
1443 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1444 const MachineBasicBlock *MBB) const {
1445 if (!TAI->getSetDirective())
1448 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1449 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1450 printBasicBlockLabel(MBB, false, false, false);
1451 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1452 << '_' << uid << '\n';
1455 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1456 const MachineBasicBlock *MBB) const {
1457 if (!TAI->getSetDirective())
1460 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1461 << getFunctionNumber() << '_' << uid << '_' << uid2
1462 << "_set_" << MBB->getNumber() << ',';
1463 printBasicBlockLabel(MBB, false, false, false);
1464 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1465 << '_' << uid << '_' << uid2 << '\n';
1468 /// printDataDirective - This method prints the asm directive for the
1470 void AsmPrinter::printDataDirective(const Type *type) {
1471 const TargetData *TD = TM.getTargetData();
1472 switch (type->getTypeID()) {
1473 case Type::IntegerTyID: {
1474 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1476 O << TAI->getData8bitsDirective();
1477 else if (BitWidth <= 16)
1478 O << TAI->getData16bitsDirective();
1479 else if (BitWidth <= 32)
1480 O << TAI->getData32bitsDirective();
1481 else if (BitWidth <= 64) {
1482 assert(TAI->getData64bitsDirective() &&
1483 "Target cannot handle 64-bit constant exprs!");
1484 O << TAI->getData64bitsDirective();
1486 assert(0 && "Target cannot handle given data directive width!");
1490 case Type::PointerTyID:
1491 if (TD->getPointerSize() == 8) {
1492 assert(TAI->getData64bitsDirective() &&
1493 "Target cannot handle 64-bit pointer exprs!");
1494 O << TAI->getData64bitsDirective();
1496 O << TAI->getData32bitsDirective();
1499 case Type::FloatTyID: case Type::DoubleTyID:
1500 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1501 assert (0 && "Should have already output floating point constant.");
1503 assert (0 && "Can't handle printing this type of thing");
1508 void AsmPrinter::printSuffixedName(const char *Name, const char *Suffix,
1509 const char *Prefix) {
1512 O << TAI->getPrivateGlobalPrefix();
1513 if (Prefix) O << Prefix;
1525 void AsmPrinter::printSuffixedName(const std::string &Name, const char* Suffix) {
1526 printSuffixedName(Name.c_str(), Suffix);
1529 void AsmPrinter::printVisibility(const std::string& Name,
1530 unsigned Visibility) const {
1531 if (Visibility == GlobalValue::HiddenVisibility) {
1532 if (const char *Directive = TAI->getHiddenDirective())
1533 O << Directive << Name << '\n';
1534 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1535 if (const char *Directive = TAI->getProtectedDirective())
1536 O << Directive << Name << '\n';
1540 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
1541 if (!S->usesMetadata())
1544 gcp_iterator GCPI = GCMetadataPrinters.find(S);
1545 if (GCPI != GCMetadataPrinters.end())
1546 return GCPI->second;
1548 const char *Name = S->getName().c_str();
1550 for (GCMetadataPrinterRegistry::iterator
1551 I = GCMetadataPrinterRegistry::begin(),
1552 E = GCMetadataPrinterRegistry::end(); I != E; ++I)
1553 if (strcmp(Name, I->getName()) == 0) {
1554 GCMetadataPrinter *GMP = I->instantiate();
1556 GCMetadataPrinters.insert(std::make_pair(S, GMP));
1560 cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";