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/CodeGen/DwarfWriter.h"
24 #include "llvm/Analysis/DebugInfo.h"
25 #include "llvm/Support/CommandLine.h"
26 #include "llvm/Support/Mangler.h"
27 #include "llvm/Support/raw_ostream.h"
28 #include "llvm/Target/TargetAsmInfo.h"
29 #include "llvm/Target/TargetData.h"
30 #include "llvm/Target/TargetLowering.h"
31 #include "llvm/Target/TargetOptions.h"
32 #include "llvm/Target/TargetRegisterInfo.h"
33 #include "llvm/ADT/SmallPtrSet.h"
34 #include "llvm/ADT/SmallString.h"
35 #include "llvm/ADT/StringExtras.h"
39 static cl::opt<cl::boolOrDefault>
40 AsmVerbose("asm-verbose", cl::desc("Add comments to directives."),
41 cl::init(cl::BOU_UNSET));
43 char AsmPrinter::ID = 0;
44 AsmPrinter::AsmPrinter(raw_ostream &o, TargetMachine &tm,
45 const TargetAsmInfo *T, CodeGenOpt::Level OL, bool VDef)
46 : MachineFunctionPass(&ID), FunctionNumber(0), OptLevel(OL), O(o),
47 TM(tm), TAI(T), TRI(tm.getRegisterInfo()),
48 IsInTextSection(false)
51 case cl::BOU_UNSET: VerboseAsm = VDef; break;
52 case cl::BOU_TRUE: VerboseAsm = true; break;
53 case cl::BOU_FALSE: VerboseAsm = false; break;
57 AsmPrinter::~AsmPrinter() {
58 for (gcp_iterator I = GCMetadataPrinters.begin(),
59 E = GCMetadataPrinters.end(); I != E; ++I)
63 /// SwitchToTextSection - Switch to the specified text section of the executable
64 /// if we are not already in it!
66 void AsmPrinter::SwitchToTextSection(const char *NewSection,
67 const GlobalValue *GV) {
69 if (GV && GV->hasSection())
70 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
74 // If we're already in this section, we're done.
75 if (CurrentSection == NS) return;
77 // Close the current section, if applicable.
78 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
79 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
83 if (!CurrentSection.empty())
84 O << CurrentSection << TAI->getTextSectionStartSuffix() << '\n';
86 IsInTextSection = true;
89 /// SwitchToDataSection - Switch to the specified data section of the executable
90 /// if we are not already in it!
92 void AsmPrinter::SwitchToDataSection(const char *NewSection,
93 const GlobalValue *GV) {
95 if (GV && GV->hasSection())
96 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
100 // If we're already in this section, we're done.
101 if (CurrentSection == NS) return;
103 // Close the current section, if applicable.
104 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
105 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
109 if (!CurrentSection.empty())
110 O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
112 IsInTextSection = false;
115 /// SwitchToSection - Switch to the specified section of the executable if we
116 /// are not already in it!
117 void AsmPrinter::SwitchToSection(const Section* NS) {
118 const std::string& NewSection = NS->getName();
120 // If we're already in this section, we're done.
121 if (CurrentSection == NewSection) return;
123 // Close the current section, if applicable.
124 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
125 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
127 // FIXME: Make CurrentSection a Section* in the future
128 CurrentSection = NewSection;
129 CurrentSection_ = NS;
131 if (!CurrentSection.empty()) {
132 // If section is named we need to switch into it via special '.section'
133 // directive and also append funky flags. Otherwise - section name is just
134 // some magic assembler directive.
136 O << TAI->getSwitchToSectionDirective()
138 << TAI->getSectionFlags(NS->getFlags());
141 O << TAI->getDataSectionStartSuffix() << '\n';
144 IsInTextSection = (NS->getFlags() & SectionFlags::Code);
147 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
148 MachineFunctionPass::getAnalysisUsage(AU);
149 AU.addRequired<GCModuleInfo>();
152 bool AsmPrinter::doInitialization(Module &M) {
153 Mang = new Mangler(M, TAI->getGlobalPrefix(), TAI->getPrivateGlobalPrefix());
155 if (TAI->doesAllowQuotesInName())
156 Mang->setUseQuotes(true);
158 GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
159 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
161 if (TAI->hasSingleParameterDotFile()) {
162 /* Very minimal debug info. It is ignored if we emit actual
163 debug info. If we don't, this at helps the user find where
164 a function came from. */
165 O << "\t.file\t\"" << M.getModuleIdentifier() << "\"\n";
168 for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
169 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
170 MP->beginAssembly(O, *this, *TAI);
172 if (!M.getModuleInlineAsm().empty())
173 O << TAI->getCommentString() << " Start of file scope inline assembly\n"
174 << M.getModuleInlineAsm()
175 << '\n' << TAI->getCommentString()
176 << " End of file scope inline assembly\n";
178 SwitchToDataSection(""); // Reset back to no section.
180 if (TAI->doesSupportDebugInformation()
181 || TAI->doesSupportExceptionHandling()) {
182 MachineModuleInfo *MMI = getAnalysisIfAvailable<MachineModuleInfo>();
184 MMI->AnalyzeModule(M);
185 DW = getAnalysisIfAvailable<DwarfWriter>();
187 DW->BeginModule(&M, MMI, O, this, TAI);
194 bool AsmPrinter::doFinalization(Module &M) {
195 // If the target wants to know about weak references, print them all.
196 if (TAI->getWeakRefDirective()) {
197 // FIXME: This is not lazy, it would be nice to only print weak references
198 // to stuff that is actually used. Note that doing so would require targets
199 // to notice uses in operands (due to constant exprs etc). This should
200 // happen with the MC stuff eventually.
201 SwitchToDataSection("");
203 // Print out module-level global variables here.
204 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
206 if (I->hasExternalWeakLinkage())
207 O << TAI->getWeakRefDirective() << Mang->getValueName(I) << '\n';
210 for (Module::const_iterator I = M.begin(), E = M.end();
212 if (I->hasExternalWeakLinkage())
213 O << TAI->getWeakRefDirective() << Mang->getValueName(I) << '\n';
217 if (TAI->getSetDirective()) {
218 if (!M.alias_empty())
219 SwitchToSection(TAI->getTextSection());
222 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
224 std::string Name = Mang->getValueName(I);
227 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
228 Target = Mang->getValueName(GV);
230 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
231 O << "\t.globl\t" << Name << '\n';
232 else if (I->hasWeakLinkage())
233 O << TAI->getWeakRefDirective() << Name << '\n';
234 else if (!I->hasLocalLinkage())
235 assert(0 && "Invalid alias linkage");
237 printVisibility(Name, I->getVisibility());
239 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
243 GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
244 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
245 for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
246 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
247 MP->finishAssembly(O, *this, *TAI);
249 // If we don't have any trampolines, then we don't require stack memory
250 // to be executable. Some targets have a directive to declare this.
251 Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
252 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
253 if (TAI->getNonexecutableStackDirective())
254 O << TAI->getNonexecutableStackDirective() << '\n';
256 delete Mang; Mang = 0;
261 AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF,
262 std::string &Name) const {
263 assert(MF && "No machine function?");
264 Name = MF->getFunction()->getName();
266 Name = Mang->getValueName(MF->getFunction());
267 Name = Mang->makeNameProper(TAI->getEHGlobalPrefix() +
268 Name + ".eh", TAI->getGlobalPrefix());
272 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
273 // What's my mangled name?
274 CurrentFnName = Mang->getValueName(MF.getFunction());
275 IncrementFunctionNumber();
279 // SectionCPs - Keep track the alignment, constpool entries per Section.
283 SmallVector<unsigned, 4> CPEs;
284 SectionCPs(const Section *s, unsigned a) : S(s), Alignment(a) {};
288 /// EmitConstantPool - Print to the current output stream assembly
289 /// representations of the constants in the constant pool MCP. This is
290 /// used to print out constants which have been "spilled to memory" by
291 /// the code generator.
293 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
294 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
295 if (CP.empty()) return;
297 // Calculate sections for constant pool entries. We collect entries to go into
298 // the same section together to reduce amount of section switch statements.
299 SmallVector<SectionCPs, 4> CPSections;
300 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
301 MachineConstantPoolEntry CPE = CP[i];
302 unsigned Align = CPE.getAlignment();
303 const Section* S = TAI->SelectSectionForMachineConst(CPE.getType());
304 // The number of sections are small, just do a linear search from the
305 // last section to the first.
307 unsigned SecIdx = CPSections.size();
308 while (SecIdx != 0) {
309 if (CPSections[--SecIdx].S == S) {
315 SecIdx = CPSections.size();
316 CPSections.push_back(SectionCPs(S, Align));
319 if (Align > CPSections[SecIdx].Alignment)
320 CPSections[SecIdx].Alignment = Align;
321 CPSections[SecIdx].CPEs.push_back(i);
324 // Now print stuff into the calculated sections.
325 for (unsigned i = 0, e = CPSections.size(); i != e; ++i) {
326 SwitchToSection(CPSections[i].S);
327 EmitAlignment(Log2_32(CPSections[i].Alignment));
330 for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) {
331 unsigned CPI = CPSections[i].CPEs[j];
332 MachineConstantPoolEntry CPE = CP[CPI];
334 // Emit inter-object padding for alignment.
335 unsigned AlignMask = CPE.getAlignment() - 1;
336 unsigned NewOffset = (Offset + AlignMask) & ~AlignMask;
337 EmitZeros(NewOffset - Offset);
339 const Type *Ty = CPE.getType();
340 Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty);
342 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
343 << CPI << ":\t\t\t\t\t";
345 O << TAI->getCommentString() << ' ';
346 WriteTypeSymbolic(O, CPE.getType(), 0);
349 if (CPE.isMachineConstantPoolEntry())
350 EmitMachineConstantPoolValue(CPE.Val.MachineCPVal);
352 EmitGlobalConstant(CPE.Val.ConstVal);
357 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
358 /// by the current function to the current output stream.
360 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
361 MachineFunction &MF) {
362 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
363 if (JT.empty()) return;
365 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
367 // Pick the directive to use to print the jump table entries, and switch to
368 // the appropriate section.
369 TargetLowering *LoweringInfo = TM.getTargetLowering();
371 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
372 const Function *F = MF.getFunction();
373 unsigned SectionFlags = TAI->SectionFlagsForGlobal(F);
374 bool JTInDiffSection = false;
375 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
376 !JumpTableDataSection ||
377 SectionFlags & SectionFlags::Linkonce) {
378 // In PIC mode, we need to emit the jump table to the same section as the
379 // function body itself, otherwise the label differences won't make sense.
380 // We should also do if the section name is NULL or function is declared in
381 // discardable section.
382 SwitchToSection(TAI->SectionForGlobal(F));
384 SwitchToDataSection(JumpTableDataSection);
385 JTInDiffSection = true;
388 EmitAlignment(Log2_32(MJTI->getAlignment()));
390 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
391 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
393 // If this jump table was deleted, ignore it.
394 if (JTBBs.empty()) continue;
396 // For PIC codegen, if possible we want to use the SetDirective to reduce
397 // the number of relocations the assembler will generate for the jump table.
398 // Set directives are all printed before the jump table itself.
399 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
400 if (TAI->getSetDirective() && IsPic)
401 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
402 if (EmittedSets.insert(JTBBs[ii]))
403 printPICJumpTableSetLabel(i, JTBBs[ii]);
405 // On some targets (e.g. darwin) we want to emit two consequtive labels
406 // before each jump table. The first label is never referenced, but tells
407 // the assembler and linker the extents of the jump table object. The
408 // second label is actually referenced by the code.
409 if (JTInDiffSection) {
410 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
411 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
414 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
415 << '_' << i << ":\n";
417 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
418 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
424 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
425 const MachineBasicBlock *MBB,
426 unsigned uid) const {
427 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
429 // Use JumpTableDirective otherwise honor the entry size from the jump table
431 const char *JTEntryDirective = TAI->getJumpTableDirective();
432 bool HadJTEntryDirective = JTEntryDirective != NULL;
433 if (!HadJTEntryDirective) {
434 JTEntryDirective = MJTI->getEntrySize() == 4 ?
435 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
438 O << JTEntryDirective << ' ';
440 // If we have emitted set directives for the jump table entries, print
441 // them rather than the entries themselves. If we're emitting PIC, then
442 // emit the table entries as differences between two text section labels.
443 // If we're emitting non-PIC code, then emit the entries as direct
444 // references to the target basic blocks.
446 if (TAI->getSetDirective()) {
447 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
448 << '_' << uid << "_set_" << MBB->getNumber();
450 printBasicBlockLabel(MBB, false, false, false);
451 // If the arch uses custom Jump Table directives, don't calc relative to
453 if (!HadJTEntryDirective)
454 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
455 << getFunctionNumber() << '_' << uid;
458 printBasicBlockLabel(MBB, false, false, false);
463 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
464 /// special global used by LLVM. If so, emit it and return true, otherwise
465 /// do nothing and return false.
466 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
467 if (GV->getName() == "llvm.used") {
468 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
469 EmitLLVMUsedList(GV->getInitializer());
473 // Ignore debug and non-emitted data.
474 if (GV->getSection() == "llvm.metadata" ||
475 GV->hasAvailableExternallyLinkage())
478 if (!GV->hasAppendingLinkage()) return false;
480 assert(GV->hasInitializer() && "Not a special LLVM global!");
482 const TargetData *TD = TM.getTargetData();
483 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
484 if (GV->getName() == "llvm.global_ctors") {
485 SwitchToDataSection(TAI->getStaticCtorsSection());
486 EmitAlignment(Align, 0);
487 EmitXXStructorList(GV->getInitializer());
491 if (GV->getName() == "llvm.global_dtors") {
492 SwitchToDataSection(TAI->getStaticDtorsSection());
493 EmitAlignment(Align, 0);
494 EmitXXStructorList(GV->getInitializer());
501 /// findGlobalValue - if CV is an expression equivalent to a single
502 /// global value, return that value.
503 const GlobalValue * AsmPrinter::findGlobalValue(const Constant *CV) {
504 if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV))
506 else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
507 const TargetData *TD = TM.getTargetData();
508 unsigned Opcode = CE->getOpcode();
510 case Instruction::GetElementPtr: {
511 const Constant *ptrVal = CE->getOperand(0);
512 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
513 if (TD->getIndexedOffset(ptrVal->getType(), &idxVec[0], idxVec.size()))
515 return findGlobalValue(ptrVal);
517 case Instruction::BitCast:
518 return findGlobalValue(CE->getOperand(0));
526 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
527 /// global in the specified llvm.used list for which emitUsedDirectiveFor
528 /// is true, as being used with this directive.
530 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
531 const char *Directive = TAI->getUsedDirective();
533 // Should be an array of 'i8*'.
534 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
535 if (InitList == 0) return;
537 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
538 const GlobalValue *GV = findGlobalValue(InitList->getOperand(i));
539 if (TAI->emitUsedDirectiveFor(GV, Mang)) {
541 EmitConstantValueOnly(InitList->getOperand(i));
547 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
548 /// function pointers, ignoring the init priority.
549 void AsmPrinter::EmitXXStructorList(Constant *List) {
550 // Should be an array of '{ int, void ()* }' structs. The first value is the
551 // init priority, which we ignore.
552 if (!isa<ConstantArray>(List)) return;
553 ConstantArray *InitList = cast<ConstantArray>(List);
554 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
555 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
556 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
558 if (CS->getOperand(1)->isNullValue())
559 return; // Found a null terminator, exit printing.
560 // Emit the function pointer.
561 EmitGlobalConstant(CS->getOperand(1));
565 /// getGlobalLinkName - Returns the asm/link name of of the specified
566 /// global variable. Should be overridden by each target asm printer to
567 /// generate the appropriate value.
568 const std::string &AsmPrinter::getGlobalLinkName(const GlobalVariable *GV,
569 std::string &LinkName) const {
570 if (isa<Function>(GV)) {
571 LinkName += TAI->getFunctionAddrPrefix();
572 LinkName += Mang->getValueName(GV);
573 LinkName += TAI->getFunctionAddrSuffix();
575 LinkName += TAI->getGlobalVarAddrPrefix();
576 LinkName += Mang->getValueName(GV);
577 LinkName += TAI->getGlobalVarAddrSuffix();
583 /// EmitExternalGlobal - Emit the external reference to a global variable.
584 /// Should be overridden if an indirect reference should be used.
585 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
587 O << getGlobalLinkName(GV, GLN);
592 //===----------------------------------------------------------------------===//
593 /// LEB 128 number encoding.
595 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
596 /// representing an unsigned leb128 value.
597 void AsmPrinter::PrintULEB128(unsigned Value) const {
600 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
602 if (Value) Byte |= 0x80;
603 O << "0x" << utohex_buffer(Byte, Buffer+20);
604 if (Value) O << ", ";
608 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
609 /// representing a signed leb128 value.
610 void AsmPrinter::PrintSLEB128(int Value) const {
611 int Sign = Value >> (8 * sizeof(Value) - 1);
616 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
618 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
619 if (IsMore) Byte |= 0x80;
620 O << "0x" << utohex_buffer(Byte, Buffer+20);
621 if (IsMore) O << ", ";
625 //===--------------------------------------------------------------------===//
626 // Emission and print routines
629 /// PrintHex - Print a value as a hexidecimal value.
631 void AsmPrinter::PrintHex(int Value) const {
633 O << "0x" << utohex_buffer(static_cast<unsigned>(Value), Buffer+20);
636 /// EOL - Print a newline character to asm stream. If a comment is present
637 /// then it will be printed first. Comments should not contain '\n'.
638 void AsmPrinter::EOL() const {
642 void AsmPrinter::EOL(const std::string &Comment) const {
643 if (VerboseAsm && !Comment.empty()) {
645 << TAI->getCommentString()
652 void AsmPrinter::EOL(const char* Comment) const {
653 if (VerboseAsm && *Comment) {
655 << TAI->getCommentString()
662 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
663 /// unsigned leb128 value.
664 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
665 if (TAI->hasLEB128()) {
669 O << TAI->getData8bitsDirective();
674 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
675 /// signed leb128 value.
676 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
677 if (TAI->hasLEB128()) {
681 O << TAI->getData8bitsDirective();
686 /// EmitInt8 - Emit a byte directive and value.
688 void AsmPrinter::EmitInt8(int Value) const {
689 O << TAI->getData8bitsDirective();
690 PrintHex(Value & 0xFF);
693 /// EmitInt16 - Emit a short directive and value.
695 void AsmPrinter::EmitInt16(int Value) const {
696 O << TAI->getData16bitsDirective();
697 PrintHex(Value & 0xFFFF);
700 /// EmitInt32 - Emit a long directive and value.
702 void AsmPrinter::EmitInt32(int Value) const {
703 O << TAI->getData32bitsDirective();
707 /// EmitInt64 - Emit a long long directive and value.
709 void AsmPrinter::EmitInt64(uint64_t Value) const {
710 if (TAI->getData64bitsDirective()) {
711 O << TAI->getData64bitsDirective();
714 if (TM.getTargetData()->isBigEndian()) {
715 EmitInt32(unsigned(Value >> 32)); O << '\n';
716 EmitInt32(unsigned(Value));
718 EmitInt32(unsigned(Value)); O << '\n';
719 EmitInt32(unsigned(Value >> 32));
724 /// toOctal - Convert the low order bits of X into an octal digit.
726 static inline char toOctal(int X) {
730 /// printStringChar - Print a char, escaped if necessary.
732 static void printStringChar(raw_ostream &O, unsigned char C) {
735 } else if (C == '\\') {
737 } else if (isprint((unsigned char)C)) {
741 case '\b': O << "\\b"; break;
742 case '\f': O << "\\f"; break;
743 case '\n': O << "\\n"; break;
744 case '\r': O << "\\r"; break;
745 case '\t': O << "\\t"; break;
748 O << toOctal(C >> 6);
749 O << toOctal(C >> 3);
750 O << toOctal(C >> 0);
756 /// EmitString - Emit a string with quotes and a null terminator.
757 /// Special characters are emitted properly.
758 /// \literal (Eg. '\t') \endliteral
759 void AsmPrinter::EmitString(const std::string &String) const {
760 EmitString(String.c_str(), String.size());
763 void AsmPrinter::EmitString(const char *String, unsigned Size) const {
764 const char* AscizDirective = TAI->getAscizDirective();
768 O << TAI->getAsciiDirective();
770 for (unsigned i = 0; i < Size; ++i)
771 printStringChar(O, String[i]);
779 /// EmitFile - Emit a .file directive.
780 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
781 O << "\t.file\t" << Number << " \"";
782 for (unsigned i = 0, N = Name.size(); i < N; ++i)
783 printStringChar(O, Name[i]);
788 //===----------------------------------------------------------------------===//
790 // EmitAlignment - Emit an alignment directive to the specified power of
791 // two boundary. For example, if you pass in 3 here, you will get an 8
792 // byte alignment. If a global value is specified, and if that global has
793 // an explicit alignment requested, it will unconditionally override the
794 // alignment request. However, if ForcedAlignBits is specified, this value
795 // has final say: the ultimate alignment will be the max of ForcedAlignBits
796 // and the alignment computed with NumBits and the global.
800 // if (GV && GV->hasalignment) Align = GV->getalignment();
801 // Align = std::max(Align, ForcedAlignBits);
803 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
804 unsigned ForcedAlignBits,
805 bool UseFillExpr) const {
806 if (GV && GV->getAlignment())
807 NumBits = Log2_32(GV->getAlignment());
808 NumBits = std::max(NumBits, ForcedAlignBits);
810 if (NumBits == 0) return; // No need to emit alignment.
811 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
812 O << TAI->getAlignDirective() << NumBits;
814 unsigned FillValue = TAI->getTextAlignFillValue();
815 UseFillExpr &= IsInTextSection && FillValue;
824 /// EmitZeros - Emit a block of zeros.
826 void AsmPrinter::EmitZeros(uint64_t NumZeros, unsigned AddrSpace) const {
828 if (TAI->getZeroDirective()) {
829 O << TAI->getZeroDirective() << NumZeros;
830 if (TAI->getZeroDirectiveSuffix())
831 O << TAI->getZeroDirectiveSuffix();
834 for (; NumZeros; --NumZeros)
835 O << TAI->getData8bitsDirective(AddrSpace) << "0\n";
840 // Print out the specified constant, without a storage class. Only the
841 // constants valid in constant expressions can occur here.
842 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
843 if (CV->isNullValue() || isa<UndefValue>(CV))
845 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
846 O << CI->getZExtValue();
847 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
848 // This is a constant address for a global variable or function. Use the
849 // name of the variable or function as the address value, possibly
850 // decorating it with GlobalVarAddrPrefix/Suffix or
851 // FunctionAddrPrefix/Suffix (these all default to "" )
852 if (isa<Function>(GV)) {
853 O << TAI->getFunctionAddrPrefix()
854 << Mang->getValueName(GV)
855 << TAI->getFunctionAddrSuffix();
857 O << TAI->getGlobalVarAddrPrefix()
858 << Mang->getValueName(GV)
859 << TAI->getGlobalVarAddrSuffix();
861 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
862 const TargetData *TD = TM.getTargetData();
863 unsigned Opcode = CE->getOpcode();
865 case Instruction::GetElementPtr: {
866 // generate a symbolic expression for the byte address
867 const Constant *ptrVal = CE->getOperand(0);
868 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
869 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
871 // Truncate/sext the offset to the pointer size.
872 if (TD->getPointerSizeInBits() != 64) {
873 int SExtAmount = 64-TD->getPointerSizeInBits();
874 Offset = (Offset << SExtAmount) >> SExtAmount;
879 EmitConstantValueOnly(ptrVal);
881 O << ") + " << Offset;
883 O << ") - " << -Offset;
885 EmitConstantValueOnly(ptrVal);
889 case Instruction::Trunc:
890 case Instruction::ZExt:
891 case Instruction::SExt:
892 case Instruction::FPTrunc:
893 case Instruction::FPExt:
894 case Instruction::UIToFP:
895 case Instruction::SIToFP:
896 case Instruction::FPToUI:
897 case Instruction::FPToSI:
898 assert(0 && "FIXME: Don't yet support this kind of constant cast expr");
900 case Instruction::BitCast:
901 return EmitConstantValueOnly(CE->getOperand(0));
903 case Instruction::IntToPtr: {
904 // Handle casts to pointers by changing them into casts to the appropriate
905 // integer type. This promotes constant folding and simplifies this code.
906 Constant *Op = CE->getOperand(0);
907 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
908 return EmitConstantValueOnly(Op);
912 case Instruction::PtrToInt: {
913 // Support only foldable casts to/from pointers that can be eliminated by
914 // changing the pointer to the appropriately sized integer type.
915 Constant *Op = CE->getOperand(0);
916 const Type *Ty = CE->getType();
918 // We can emit the pointer value into this slot if the slot is an
919 // integer slot greater or equal to the size of the pointer.
920 if (TD->getTypeAllocSize(Ty) >= TD->getTypeAllocSize(Op->getType()))
921 return EmitConstantValueOnly(Op);
924 EmitConstantValueOnly(Op);
925 APInt ptrMask = APInt::getAllOnesValue(TD->getTypeAllocSizeInBits(Ty));
928 ptrMask.toStringUnsigned(S);
929 O << ") & " << S.c_str() << ')';
932 case Instruction::Add:
933 case Instruction::Sub:
934 case Instruction::And:
935 case Instruction::Or:
936 case Instruction::Xor:
938 EmitConstantValueOnly(CE->getOperand(0));
941 case Instruction::Add:
944 case Instruction::Sub:
947 case Instruction::And:
950 case Instruction::Or:
953 case Instruction::Xor:
960 EmitConstantValueOnly(CE->getOperand(1));
964 assert(0 && "Unsupported operator!");
967 assert(0 && "Unknown constant value!");
971 /// printAsCString - Print the specified array as a C compatible string, only if
972 /// the predicate isString is true.
974 static void printAsCString(raw_ostream &O, const ConstantArray *CVA,
976 assert(CVA->isString() && "Array is not string compatible!");
979 for (unsigned i = 0; i != LastElt; ++i) {
981 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
982 printStringChar(O, C);
987 /// EmitString - Emit a zero-byte-terminated string constant.
989 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
990 unsigned NumElts = CVA->getNumOperands();
991 if (TAI->getAscizDirective() && NumElts &&
992 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
993 O << TAI->getAscizDirective();
994 printAsCString(O, CVA, NumElts-1);
996 O << TAI->getAsciiDirective();
997 printAsCString(O, CVA, NumElts);
1002 void AsmPrinter::EmitGlobalConstantArray(const ConstantArray *CVA,
1003 unsigned AddrSpace) {
1004 if (CVA->isString()) {
1006 } else { // Not a string. Print the values in successive locations
1007 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
1008 EmitGlobalConstant(CVA->getOperand(i), AddrSpace);
1012 void AsmPrinter::EmitGlobalConstantVector(const ConstantVector *CP) {
1013 const VectorType *PTy = CP->getType();
1015 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
1016 EmitGlobalConstant(CP->getOperand(I));
1019 void AsmPrinter::EmitGlobalConstantStruct(const ConstantStruct *CVS,
1020 unsigned AddrSpace) {
1021 // Print the fields in successive locations. Pad to align if needed!
1022 const TargetData *TD = TM.getTargetData();
1023 unsigned Size = TD->getTypeAllocSize(CVS->getType());
1024 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
1025 uint64_t sizeSoFar = 0;
1026 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
1027 const Constant* field = CVS->getOperand(i);
1029 // Check if padding is needed and insert one or more 0s.
1030 uint64_t fieldSize = TD->getTypeAllocSize(field->getType());
1031 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
1032 - cvsLayout->getElementOffset(i)) - fieldSize;
1033 sizeSoFar += fieldSize + padSize;
1035 // Now print the actual field value.
1036 EmitGlobalConstant(field, AddrSpace);
1038 // Insert padding - this may include padding to increase the size of the
1039 // current field up to the ABI size (if the struct is not packed) as well
1040 // as padding to ensure that the next field starts at the right offset.
1041 EmitZeros(padSize, AddrSpace);
1043 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
1044 "Layout of constant struct may be incorrect!");
1047 void AsmPrinter::EmitGlobalConstantFP(const ConstantFP *CFP,
1048 unsigned AddrSpace) {
1049 // FP Constants are printed as integer constants to avoid losing
1051 const TargetData *TD = TM.getTargetData();
1052 if (CFP->getType() == Type::DoubleTy) {
1053 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
1054 uint64_t i = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
1055 if (TAI->getData64bitsDirective(AddrSpace)) {
1056 O << TAI->getData64bitsDirective(AddrSpace) << i;
1058 O << '\t' << TAI->getCommentString() << " double value: " << Val;
1060 } else if (TD->isBigEndian()) {
1061 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
1063 O << '\t' << TAI->getCommentString()
1064 << " double most significant word " << Val;
1066 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
1068 O << '\t' << TAI->getCommentString()
1069 << " double least significant word " << Val;
1072 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
1074 O << '\t' << TAI->getCommentString()
1075 << " double least significant word " << Val;
1077 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
1079 O << '\t' << TAI->getCommentString()
1080 << " double most significant word " << Val;
1084 } else if (CFP->getType() == Type::FloatTy) {
1085 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
1086 O << TAI->getData32bitsDirective(AddrSpace)
1087 << CFP->getValueAPF().bitcastToAPInt().getZExtValue();
1089 O << '\t' << TAI->getCommentString() << " float " << Val;
1092 } else if (CFP->getType() == Type::X86_FP80Ty) {
1093 // all long double variants are printed as hex
1094 // api needed to prevent premature destruction
1095 APInt api = CFP->getValueAPF().bitcastToAPInt();
1096 const uint64_t *p = api.getRawData();
1097 // Convert to double so we can print the approximate val as a comment.
1098 APFloat DoubleVal = CFP->getValueAPF();
1100 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
1102 if (TD->isBigEndian()) {
1103 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
1105 O << '\t' << TAI->getCommentString()
1106 << " long double most significant halfword of ~"
1107 << DoubleVal.convertToDouble();
1109 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
1111 O << '\t' << TAI->getCommentString() << " long double next halfword";
1113 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
1115 O << '\t' << TAI->getCommentString() << " long double next halfword";
1117 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
1119 O << '\t' << TAI->getCommentString() << " long double next halfword";
1121 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
1123 O << '\t' << TAI->getCommentString()
1124 << " long double least significant halfword";
1127 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
1129 O << '\t' << TAI->getCommentString()
1130 << " long double least significant halfword of ~"
1131 << DoubleVal.convertToDouble();
1133 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
1135 O << '\t' << TAI->getCommentString()
1136 << " long double next halfword";
1138 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
1140 O << '\t' << TAI->getCommentString()
1141 << " long double next halfword";
1143 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
1145 O << '\t' << TAI->getCommentString()
1146 << " long double next halfword";
1148 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
1150 O << '\t' << TAI->getCommentString()
1151 << " long double most significant halfword";
1154 EmitZeros(TD->getTypeAllocSize(Type::X86_FP80Ty) -
1155 TD->getTypeStoreSize(Type::X86_FP80Ty), AddrSpace);
1157 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1158 // all long double variants are printed as hex
1159 // api needed to prevent premature destruction
1160 APInt api = CFP->getValueAPF().bitcastToAPInt();
1161 const uint64_t *p = api.getRawData();
1162 if (TD->isBigEndian()) {
1163 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
1165 O << '\t' << TAI->getCommentString()
1166 << " long double most significant word";
1168 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
1170 O << '\t' << TAI->getCommentString()
1171 << " long double next word";
1173 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
1175 O << '\t' << TAI->getCommentString()
1176 << " long double next word";
1178 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
1180 O << '\t' << TAI->getCommentString()
1181 << " long double least significant word";
1184 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
1186 O << '\t' << TAI->getCommentString()
1187 << " long double least significant word";
1189 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
1191 O << '\t' << TAI->getCommentString()
1192 << " long double next word";
1194 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
1196 O << '\t' << TAI->getCommentString()
1197 << " long double next word";
1199 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
1201 O << '\t' << TAI->getCommentString()
1202 << " long double most significant word";
1206 } else assert(0 && "Floating point constant type not handled");
1209 void AsmPrinter::EmitGlobalConstantLargeInt(const ConstantInt *CI,
1210 unsigned AddrSpace) {
1211 const TargetData *TD = TM.getTargetData();
1212 unsigned BitWidth = CI->getBitWidth();
1213 assert(isPowerOf2_32(BitWidth) &&
1214 "Non-power-of-2-sized integers not handled!");
1216 // We don't expect assemblers to support integer data directives
1217 // for more than 64 bits, so we emit the data in at most 64-bit
1218 // quantities at a time.
1219 const uint64_t *RawData = CI->getValue().getRawData();
1220 for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
1222 if (TD->isBigEndian())
1223 Val = RawData[e - i - 1];
1227 if (TAI->getData64bitsDirective(AddrSpace))
1228 O << TAI->getData64bitsDirective(AddrSpace) << Val << '\n';
1229 else if (TD->isBigEndian()) {
1230 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
1232 O << '\t' << TAI->getCommentString()
1233 << " Double-word most significant word " << Val;
1235 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
1237 O << '\t' << TAI->getCommentString()
1238 << " Double-word least significant word " << Val;
1241 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
1243 O << '\t' << TAI->getCommentString()
1244 << " Double-word least significant word " << Val;
1246 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
1248 O << '\t' << TAI->getCommentString()
1249 << " Double-word most significant word " << Val;
1255 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
1256 void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) {
1257 const TargetData *TD = TM.getTargetData();
1258 const Type *type = CV->getType();
1259 unsigned Size = TD->getTypeAllocSize(type);
1261 if (CV->isNullValue() || isa<UndefValue>(CV)) {
1262 EmitZeros(Size, AddrSpace);
1264 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
1265 EmitGlobalConstantArray(CVA , AddrSpace);
1267 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
1268 EmitGlobalConstantStruct(CVS, AddrSpace);
1270 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
1271 EmitGlobalConstantFP(CFP, AddrSpace);
1273 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1274 // Small integers are handled below; large integers are handled here.
1276 EmitGlobalConstantLargeInt(CI, AddrSpace);
1279 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1280 EmitGlobalConstantVector(CP);
1284 printDataDirective(type, AddrSpace);
1285 EmitConstantValueOnly(CV);
1287 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1289 CI->getValue().toStringUnsigned(S, 16);
1290 O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
1296 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1297 // Target doesn't support this yet!
1301 /// PrintSpecial - Print information related to the specified machine instr
1302 /// that is independent of the operand, and may be independent of the instr
1303 /// itself. This can be useful for portably encoding the comment character
1304 /// or other bits of target-specific knowledge into the asmstrings. The
1305 /// syntax used is ${:comment}. Targets can override this to add support
1306 /// for their own strange codes.
1307 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) const {
1308 if (!strcmp(Code, "private")) {
1309 O << TAI->getPrivateGlobalPrefix();
1310 } else if (!strcmp(Code, "comment")) {
1312 O << TAI->getCommentString();
1313 } else if (!strcmp(Code, "uid")) {
1314 // Assign a unique ID to this machine instruction.
1315 static const MachineInstr *LastMI = 0;
1316 static const Function *F = 0;
1317 static unsigned Counter = 0U-1;
1319 // Comparing the address of MI isn't sufficient, because machineinstrs may
1320 // be allocated to the same address across functions.
1321 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1323 // If this is a new machine instruction, bump the counter.
1324 if (LastMI != MI || F != ThisF) {
1331 cerr << "Unknown special formatter '" << Code
1332 << "' for machine instr: " << *MI;
1337 /// processDebugLoc - Processes the debug information of each machine
1338 /// instruction's DebugLoc.
1339 void AsmPrinter::processDebugLoc(DebugLoc DL) {
1340 if (TAI->doesSupportDebugInformation() && DW->ShouldEmitDwarfDebug()) {
1341 if (!DL.isUnknown()) {
1342 static DebugLocTuple PrevDLT(0, ~0U, ~0U);
1343 DebugLocTuple CurDLT = MF->getDebugLocTuple(DL);
1345 if (CurDLT.CompileUnit != 0 && PrevDLT != CurDLT)
1346 printLabel(DW->RecordSourceLine(CurDLT.Line, CurDLT.Col,
1347 DICompileUnit(CurDLT.CompileUnit)));
1354 /// printInlineAsm - This method formats and prints the specified machine
1355 /// instruction that is an inline asm.
1356 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1357 unsigned NumOperands = MI->getNumOperands();
1359 // Count the number of register definitions.
1360 unsigned NumDefs = 0;
1361 for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
1363 assert(NumDefs != NumOperands-1 && "No asm string?");
1365 assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
1367 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1368 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1370 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1371 // These are useful to see where empty asm's wound up.
1372 if (AsmStr[0] == 0) {
1373 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1377 O << TAI->getInlineAsmStart() << "\n\t";
1379 // The variant of the current asmprinter.
1380 int AsmPrinterVariant = TAI->getAssemblerDialect();
1382 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1383 const char *LastEmitted = AsmStr; // One past the last character emitted.
1385 while (*LastEmitted) {
1386 switch (*LastEmitted) {
1388 // Not a special case, emit the string section literally.
1389 const char *LiteralEnd = LastEmitted+1;
1390 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1391 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1393 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1394 O.write(LastEmitted, LiteralEnd-LastEmitted);
1395 LastEmitted = LiteralEnd;
1399 ++LastEmitted; // Consume newline character.
1400 O << '\n'; // Indent code with newline.
1403 ++LastEmitted; // Consume '$' character.
1407 switch (*LastEmitted) {
1408 default: Done = false; break;
1409 case '$': // $$ -> $
1410 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1412 ++LastEmitted; // Consume second '$' character.
1414 case '(': // $( -> same as GCC's { character.
1415 ++LastEmitted; // Consume '(' character.
1416 if (CurVariant != -1) {
1417 cerr << "Nested variants found in inline asm string: '"
1421 CurVariant = 0; // We're in the first variant now.
1424 ++LastEmitted; // consume '|' character.
1425 if (CurVariant == -1)
1426 O << '|'; // this is gcc's behavior for | outside a variant
1428 ++CurVariant; // We're in the next variant.
1430 case ')': // $) -> same as GCC's } char.
1431 ++LastEmitted; // consume ')' character.
1432 if (CurVariant == -1)
1433 O << '}'; // this is gcc's behavior for } outside a variant
1440 bool HasCurlyBraces = false;
1441 if (*LastEmitted == '{') { // ${variable}
1442 ++LastEmitted; // Consume '{' character.
1443 HasCurlyBraces = true;
1446 // If we have ${:foo}, then this is not a real operand reference, it is a
1447 // "magic" string reference, just like in .td files. Arrange to call
1449 if (HasCurlyBraces && *LastEmitted == ':') {
1451 const char *StrStart = LastEmitted;
1452 const char *StrEnd = strchr(StrStart, '}');
1454 cerr << "Unterminated ${:foo} operand in inline asm string: '"
1459 std::string Val(StrStart, StrEnd);
1460 PrintSpecial(MI, Val.c_str());
1461 LastEmitted = StrEnd+1;
1465 const char *IDStart = LastEmitted;
1468 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1469 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1470 cerr << "Bad $ operand number in inline asm string: '"
1474 LastEmitted = IDEnd;
1476 char Modifier[2] = { 0, 0 };
1478 if (HasCurlyBraces) {
1479 // If we have curly braces, check for a modifier character. This
1480 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1481 if (*LastEmitted == ':') {
1482 ++LastEmitted; // Consume ':' character.
1483 if (*LastEmitted == 0) {
1484 cerr << "Bad ${:} expression in inline asm string: '"
1489 Modifier[0] = *LastEmitted;
1490 ++LastEmitted; // Consume modifier character.
1493 if (*LastEmitted != '}') {
1494 cerr << "Bad ${} expression in inline asm string: '"
1498 ++LastEmitted; // Consume '}' character.
1501 if ((unsigned)Val >= NumOperands-1) {
1502 cerr << "Invalid $ operand number in inline asm string: '"
1507 // Okay, we finally have a value number. Ask the target to print this
1509 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1514 // Scan to find the machine operand number for the operand.
1515 for (; Val; --Val) {
1516 if (OpNo >= MI->getNumOperands()) break;
1517 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1518 OpNo += InlineAsm::getNumOperandRegisters(OpFlags) + 1;
1521 if (OpNo >= MI->getNumOperands()) {
1524 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1525 ++OpNo; // Skip over the ID number.
1527 if (Modifier[0]=='l') // labels are target independent
1528 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1529 false, false, false);
1531 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1532 if ((OpFlags & 7) == 4) {
1533 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1534 Modifier[0] ? Modifier : 0);
1536 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1537 Modifier[0] ? Modifier : 0);
1542 cerr << "Invalid operand found in inline asm: '"
1552 O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1555 /// printImplicitDef - This method prints the specified machine instruction
1556 /// that is an implicit def.
1557 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1559 O << '\t' << TAI->getCommentString() << " implicit-def: "
1560 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1563 /// printLabel - This method prints a local label used by debug and
1564 /// exception handling tables.
1565 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1566 printLabel(MI->getOperand(0).getImm());
1569 void AsmPrinter::printLabel(unsigned Id) const {
1570 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1573 /// printDeclare - This method prints a local variable declaration used by
1575 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1576 /// entry into dwarf table.
1577 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1578 unsigned FI = MI->getOperand(0).getIndex();
1579 GlobalValue *GV = MI->getOperand(1).getGlobal();
1580 DW->RecordVariable(cast<GlobalVariable>(GV), FI, MI);
1583 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1584 /// instruction, using the specified assembler variant. Targets should
1585 /// overried this to format as appropriate.
1586 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1587 unsigned AsmVariant, const char *ExtraCode) {
1588 // Target doesn't support this yet!
1592 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1593 unsigned AsmVariant,
1594 const char *ExtraCode) {
1595 // Target doesn't support this yet!
1599 /// printBasicBlockLabel - This method prints the label for the specified
1600 /// MachineBasicBlock
1601 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1604 bool printComment) const {
1606 unsigned Align = MBB->getAlignment();
1608 EmitAlignment(Log2_32(Align));
1611 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1612 << MBB->getNumber();
1615 if (printComment && MBB->getBasicBlock())
1616 O << '\t' << TAI->getCommentString() << ' '
1617 << MBB->getBasicBlock()->getNameStart();
1620 /// printPICJumpTableSetLabel - This method prints a set label for the
1621 /// specified MachineBasicBlock for a jumptable entry.
1622 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1623 const MachineBasicBlock *MBB) const {
1624 if (!TAI->getSetDirective())
1627 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1628 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1629 printBasicBlockLabel(MBB, false, false, false);
1630 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1631 << '_' << uid << '\n';
1634 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1635 const MachineBasicBlock *MBB) const {
1636 if (!TAI->getSetDirective())
1639 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1640 << getFunctionNumber() << '_' << uid << '_' << uid2
1641 << "_set_" << MBB->getNumber() << ',';
1642 printBasicBlockLabel(MBB, false, false, false);
1643 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1644 << '_' << uid << '_' << uid2 << '\n';
1647 /// printDataDirective - This method prints the asm directive for the
1649 void AsmPrinter::printDataDirective(const Type *type, unsigned AddrSpace) {
1650 const TargetData *TD = TM.getTargetData();
1651 switch (type->getTypeID()) {
1652 case Type::IntegerTyID: {
1653 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1655 O << TAI->getData8bitsDirective(AddrSpace);
1656 else if (BitWidth <= 16)
1657 O << TAI->getData16bitsDirective(AddrSpace);
1658 else if (BitWidth <= 32)
1659 O << TAI->getData32bitsDirective(AddrSpace);
1660 else if (BitWidth <= 64) {
1661 assert(TAI->getData64bitsDirective(AddrSpace) &&
1662 "Target cannot handle 64-bit constant exprs!");
1663 O << TAI->getData64bitsDirective(AddrSpace);
1665 assert(0 && "Target cannot handle given data directive width!");
1669 case Type::PointerTyID:
1670 if (TD->getPointerSize() == 8) {
1671 assert(TAI->getData64bitsDirective(AddrSpace) &&
1672 "Target cannot handle 64-bit pointer exprs!");
1673 O << TAI->getData64bitsDirective(AddrSpace);
1674 } else if (TD->getPointerSize() == 2) {
1675 O << TAI->getData16bitsDirective(AddrSpace);
1676 } else if (TD->getPointerSize() == 1) {
1677 O << TAI->getData8bitsDirective(AddrSpace);
1679 O << TAI->getData32bitsDirective(AddrSpace);
1682 case Type::FloatTyID: case Type::DoubleTyID:
1683 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1684 assert (0 && "Should have already output floating point constant.");
1686 assert (0 && "Can't handle printing this type of thing");
1691 void AsmPrinter::printSuffixedName(const char *Name, const char *Suffix,
1692 const char *Prefix) {
1695 O << TAI->getPrivateGlobalPrefix();
1696 if (Prefix) O << Prefix;
1708 void AsmPrinter::printSuffixedName(const std::string &Name, const char* Suffix) {
1709 printSuffixedName(Name.c_str(), Suffix);
1712 void AsmPrinter::printVisibility(const std::string& Name,
1713 unsigned Visibility) const {
1714 if (Visibility == GlobalValue::HiddenVisibility) {
1715 if (const char *Directive = TAI->getHiddenDirective())
1716 O << Directive << Name << '\n';
1717 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1718 if (const char *Directive = TAI->getProtectedDirective())
1719 O << Directive << Name << '\n';
1723 void AsmPrinter::printOffset(int64_t Offset) const {
1726 else if (Offset < 0)
1730 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
1731 if (!S->usesMetadata())
1734 gcp_iterator GCPI = GCMetadataPrinters.find(S);
1735 if (GCPI != GCMetadataPrinters.end())
1736 return GCPI->second;
1738 const char *Name = S->getName().c_str();
1740 for (GCMetadataPrinterRegistry::iterator
1741 I = GCMetadataPrinterRegistry::begin(),
1742 E = GCMetadataPrinterRegistry::end(); I != E; ++I)
1743 if (strcmp(Name, I->getName()) == 0) {
1744 GCMetadataPrinter *GMP = I->instantiate();
1746 GCMetadataPrinters.insert(std::make_pair(S, GMP));
1750 cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";