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/MC/MCInst.h"
26 #include "llvm/Support/CommandLine.h"
27 #include "llvm/Support/ErrorHandling.h"
28 #include "llvm/Support/FormattedStream.h"
29 #include "llvm/Support/Mangler.h"
30 #include "llvm/Target/TargetAsmInfo.h"
31 #include "llvm/Target/TargetData.h"
32 #include "llvm/Target/TargetLowering.h"
33 #include "llvm/Target/TargetOptions.h"
34 #include "llvm/Target/TargetRegisterInfo.h"
35 #include "llvm/ADT/SmallPtrSet.h"
36 #include "llvm/ADT/SmallString.h"
37 #include "llvm/ADT/StringExtras.h"
41 static cl::opt<cl::boolOrDefault>
42 AsmVerbose("asm-verbose", cl::desc("Add comments to directives."),
43 cl::init(cl::BOU_UNSET));
45 char AsmPrinter::ID = 0;
46 AsmPrinter::AsmPrinter(formatted_raw_ostream &o, TargetMachine &tm,
47 const TargetAsmInfo *T, bool VDef)
48 : MachineFunctionPass(&ID), FunctionNumber(0), O(o),
49 TM(tm), TAI(T), TRI(tm.getRegisterInfo()),
50 IsInTextSection(false), LastMI(0), LastFn(0), Counter(~0U),
51 PrevDLT(0, ~0U, ~0U) {
54 case cl::BOU_UNSET: VerboseAsm = VDef; break;
55 case cl::BOU_TRUE: VerboseAsm = true; break;
56 case cl::BOU_FALSE: VerboseAsm = false; break;
60 AsmPrinter::~AsmPrinter() {
61 for (gcp_iterator I = GCMetadataPrinters.begin(),
62 E = GCMetadataPrinters.end(); I != E; ++I)
66 /// SwitchToTextSection - Switch to the specified text section of the executable
67 /// if we are not already in it!
69 void AsmPrinter::SwitchToTextSection(const char *NewSection,
70 const GlobalValue *GV) {
72 if (GV && GV->hasSection())
73 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
77 // If we're already in this section, we're done.
78 if (CurrentSection == NS) return;
80 // Close the current section, if applicable.
81 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
82 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
86 if (!CurrentSection.empty())
87 O << CurrentSection << TAI->getTextSectionStartSuffix() << '\n';
89 IsInTextSection = true;
92 /// SwitchToDataSection - Switch to the specified data section of the executable
93 /// if we are not already in it!
95 void AsmPrinter::SwitchToDataSection(const char *NewSection,
96 const GlobalValue *GV) {
98 if (GV && GV->hasSection())
99 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
103 // If we're already in this section, we're done.
104 if (CurrentSection == NS) return;
106 // Close the current section, if applicable.
107 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
108 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
112 if (!CurrentSection.empty())
113 O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
115 IsInTextSection = false;
118 /// SwitchToSection - Switch to the specified section of the executable if we
119 /// are not already in it!
120 void AsmPrinter::SwitchToSection(const Section* NS) {
121 const std::string& NewSection = NS->getName();
123 // If we're already in this section, we're done.
124 if (CurrentSection == NewSection) return;
126 // Close the current section, if applicable.
127 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
128 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
130 // FIXME: Make CurrentSection a Section* in the future
131 CurrentSection = NewSection;
132 CurrentSection_ = NS;
134 if (!CurrentSection.empty()) {
135 // If section is named we need to switch into it via special '.section'
136 // directive and also append funky flags. Otherwise - section name is just
137 // some magic assembler directive.
138 if (NS->hasFlag(SectionFlags::Named))
139 O << TAI->getSwitchToSectionDirective()
141 << TAI->getSectionFlags(NS->getFlags());
144 O << TAI->getDataSectionStartSuffix() << '\n';
147 IsInTextSection = (NS->getFlags() & SectionFlags::Code);
150 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
151 MachineFunctionPass::getAnalysisUsage(AU);
152 AU.addRequired<GCModuleInfo>();
155 bool AsmPrinter::doInitialization(Module &M) {
156 Mang = new Mangler(M, TAI->getGlobalPrefix(), TAI->getPrivateGlobalPrefix(),
157 TAI->getLinkerPrivateGlobalPrefix());
159 if (TAI->doesAllowQuotesInName())
160 Mang->setUseQuotes(true);
162 GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
163 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
165 if (TAI->hasSingleParameterDotFile()) {
166 /* Very minimal debug info. It is ignored if we emit actual
167 debug info. If we don't, this at helps the user find where
168 a function came from. */
169 O << "\t.file\t\"" << M.getModuleIdentifier() << "\"\n";
172 for (GCModuleInfo::iterator I = MI->begin(), E = MI->end(); I != E; ++I)
173 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*I))
174 MP->beginAssembly(O, *this, *TAI);
176 if (!M.getModuleInlineAsm().empty())
177 O << TAI->getCommentString() << " Start of file scope inline assembly\n"
178 << M.getModuleInlineAsm()
179 << '\n' << TAI->getCommentString()
180 << " End of file scope inline assembly\n";
182 SwitchToDataSection(""); // Reset back to no section.
184 if (TAI->doesSupportDebugInformation() ||
185 TAI->doesSupportExceptionHandling()) {
186 MMI = getAnalysisIfAvailable<MachineModuleInfo>();
188 MMI->AnalyzeModule(M);
189 DW = getAnalysisIfAvailable<DwarfWriter>();
191 DW->BeginModule(&M, MMI, O, this, TAI);
197 bool AsmPrinter::doFinalization(Module &M) {
198 // Emit global variables.
199 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
201 PrintGlobalVariable(I);
203 // Emit final debug information.
204 if (TAI->doesSupportDebugInformation() || TAI->doesSupportExceptionHandling())
207 // If the target wants to know about weak references, print them all.
208 if (TAI->getWeakRefDirective()) {
209 // FIXME: This is not lazy, it would be nice to only print weak references
210 // to stuff that is actually used. Note that doing so would require targets
211 // to notice uses in operands (due to constant exprs etc). This should
212 // happen with the MC stuff eventually.
213 SwitchToDataSection("");
215 // Print out module-level global variables here.
216 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
218 if (I->hasExternalWeakLinkage())
219 O << TAI->getWeakRefDirective() << Mang->getMangledName(I) << '\n';
222 for (Module::const_iterator I = M.begin(), E = M.end();
224 if (I->hasExternalWeakLinkage())
225 O << TAI->getWeakRefDirective() << Mang->getMangledName(I) << '\n';
229 if (TAI->getSetDirective()) {
230 if (!M.alias_empty())
231 SwitchToSection(TAI->getTextSection());
234 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
236 std::string Name = Mang->getMangledName(I);
238 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
239 std::string Target = Mang->getMangledName(GV);
241 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
242 O << "\t.globl\t" << Name << '\n';
243 else if (I->hasWeakLinkage())
244 O << TAI->getWeakRefDirective() << Name << '\n';
245 else if (!I->hasLocalLinkage())
246 llvm_unreachable("Invalid alias linkage");
248 printVisibility(Name, I->getVisibility());
250 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
254 GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
255 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
256 for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
257 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
258 MP->finishAssembly(O, *this, *TAI);
260 // If we don't have any trampolines, then we don't require stack memory
261 // to be executable. Some targets have a directive to declare this.
262 Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
263 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
264 if (TAI->getNonexecutableStackDirective())
265 O << TAI->getNonexecutableStackDirective() << '\n';
267 delete Mang; Mang = 0;
273 AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) const {
274 assert(MF && "No machine function?");
275 return Mang->getMangledName(MF->getFunction(), ".eh",
276 TAI->is_EHSymbolPrivate());
279 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
280 // What's my mangled name?
281 CurrentFnName = Mang->getMangledName(MF.getFunction());
282 IncrementFunctionNumber();
286 // SectionCPs - Keep track the alignment, constpool entries per Section.
290 SmallVector<unsigned, 4> CPEs;
291 SectionCPs(const Section *s, unsigned a) : S(s), Alignment(a) {};
295 /// EmitConstantPool - Print to the current output stream assembly
296 /// representations of the constants in the constant pool MCP. This is
297 /// used to print out constants which have been "spilled to memory" by
298 /// the code generator.
300 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
301 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
302 if (CP.empty()) return;
304 const TargetData &TD = *TM.getTargetData();
306 // Calculate sections for constant pool entries. We collect entries to go into
307 // the same section together to reduce amount of section switch statements.
308 SmallVector<SectionCPs, 4> CPSections;
309 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
310 const MachineConstantPoolEntry &CPE = CP[i];
311 unsigned Align = CPE.getAlignment();
312 uint64_t Size = TD.getTypeAllocSize(CPE.getType());
314 TAI->getSectionForMergableConstant(Size, CPE.getRelocationInfo());
316 // The number of sections are small, just do a linear search from the
317 // last section to the first.
319 unsigned SecIdx = CPSections.size();
320 while (SecIdx != 0) {
321 if (CPSections[--SecIdx].S == S) {
327 SecIdx = CPSections.size();
328 CPSections.push_back(SectionCPs(S, Align));
331 if (Align > CPSections[SecIdx].Alignment)
332 CPSections[SecIdx].Alignment = Align;
333 CPSections[SecIdx].CPEs.push_back(i);
336 // Now print stuff into the calculated sections.
337 for (unsigned i = 0, e = CPSections.size(); i != e; ++i) {
338 SwitchToSection(CPSections[i].S);
339 EmitAlignment(Log2_32(CPSections[i].Alignment));
342 for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) {
343 unsigned CPI = CPSections[i].CPEs[j];
344 MachineConstantPoolEntry CPE = CP[CPI];
346 // Emit inter-object padding for alignment.
347 unsigned AlignMask = CPE.getAlignment() - 1;
348 unsigned NewOffset = (Offset + AlignMask) & ~AlignMask;
349 EmitZeros(NewOffset - Offset);
351 const Type *Ty = CPE.getType();
352 Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty);
354 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
355 << CPI << ":\t\t\t\t\t";
357 O << TAI->getCommentString() << ' ';
358 WriteTypeSymbolic(O, CPE.getType(), 0);
361 if (CPE.isMachineConstantPoolEntry())
362 EmitMachineConstantPoolValue(CPE.Val.MachineCPVal);
364 EmitGlobalConstant(CPE.Val.ConstVal);
369 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
370 /// by the current function to the current output stream.
372 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
373 MachineFunction &MF) {
374 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
375 if (JT.empty()) return;
377 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
379 // Pick the directive to use to print the jump table entries, and switch to
380 // the appropriate section.
381 TargetLowering *LoweringInfo = TM.getTargetLowering();
383 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
384 const Function *F = MF.getFunction();
385 unsigned SectionFlags = TAI->SectionFlagsForGlobal(F);
386 bool JTInDiffSection = false;
387 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
388 !JumpTableDataSection ||
389 SectionFlags & SectionFlags::Linkonce) {
390 // In PIC mode, we need to emit the jump table to the same section as the
391 // function body itself, otherwise the label differences won't make sense.
392 // We should also do if the section name is NULL or function is declared in
393 // discardable section.
394 SwitchToSection(TAI->SectionForGlobal(F));
396 SwitchToDataSection(JumpTableDataSection);
397 JTInDiffSection = true;
400 EmitAlignment(Log2_32(MJTI->getAlignment()));
402 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
403 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
405 // If this jump table was deleted, ignore it.
406 if (JTBBs.empty()) continue;
408 // For PIC codegen, if possible we want to use the SetDirective to reduce
409 // the number of relocations the assembler will generate for the jump table.
410 // Set directives are all printed before the jump table itself.
411 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
412 if (TAI->getSetDirective() && IsPic)
413 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
414 if (EmittedSets.insert(JTBBs[ii]))
415 printPICJumpTableSetLabel(i, JTBBs[ii]);
417 // On some targets (e.g. darwin) we want to emit two consequtive labels
418 // before each jump table. The first label is never referenced, but tells
419 // the assembler and linker the extents of the jump table object. The
420 // second label is actually referenced by the code.
421 if (JTInDiffSection) {
422 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
423 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
426 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
427 << '_' << i << ":\n";
429 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
430 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
436 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
437 const MachineBasicBlock *MBB,
438 unsigned uid) const {
439 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
441 // Use JumpTableDirective otherwise honor the entry size from the jump table
443 const char *JTEntryDirective = TAI->getJumpTableDirective();
444 bool HadJTEntryDirective = JTEntryDirective != NULL;
445 if (!HadJTEntryDirective) {
446 JTEntryDirective = MJTI->getEntrySize() == 4 ?
447 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
450 O << JTEntryDirective << ' ';
452 // If we have emitted set directives for the jump table entries, print
453 // them rather than the entries themselves. If we're emitting PIC, then
454 // emit the table entries as differences between two text section labels.
455 // If we're emitting non-PIC code, then emit the entries as direct
456 // references to the target basic blocks.
458 if (TAI->getSetDirective()) {
459 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
460 << '_' << uid << "_set_" << MBB->getNumber();
462 printBasicBlockLabel(MBB, false, false, false);
463 // If the arch uses custom Jump Table directives, don't calc relative to
465 if (!HadJTEntryDirective)
466 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
467 << getFunctionNumber() << '_' << uid;
470 printBasicBlockLabel(MBB, false, false, false);
475 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
476 /// special global used by LLVM. If so, emit it and return true, otherwise
477 /// do nothing and return false.
478 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
479 if (GV->isName("llvm.used")) {
480 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
481 EmitLLVMUsedList(GV->getInitializer());
485 // Ignore debug and non-emitted data. This handles llvm.compiler.used.
486 if (GV->getSection() == "llvm.metadata" ||
487 GV->hasAvailableExternallyLinkage())
490 if (!GV->hasAppendingLinkage()) return false;
492 assert(GV->hasInitializer() && "Not a special LLVM global!");
494 const TargetData *TD = TM.getTargetData();
495 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
496 if (GV->getName() == "llvm.global_ctors") {
497 SwitchToDataSection(TAI->getStaticCtorsSection());
498 EmitAlignment(Align, 0);
499 EmitXXStructorList(GV->getInitializer());
503 if (GV->getName() == "llvm.global_dtors") {
504 SwitchToDataSection(TAI->getStaticDtorsSection());
505 EmitAlignment(Align, 0);
506 EmitXXStructorList(GV->getInitializer());
513 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
514 /// global in the specified llvm.used list for which emitUsedDirectiveFor
515 /// is true, as being used with this directive.
516 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
517 const char *Directive = TAI->getUsedDirective();
519 // Should be an array of 'i8*'.
520 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
521 if (InitList == 0) return;
523 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
524 const GlobalValue *GV =
525 dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts());
526 if (GV && TAI->emitUsedDirectiveFor(GV, Mang)) {
528 EmitConstantValueOnly(InitList->getOperand(i));
534 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
535 /// function pointers, ignoring the init priority.
536 void AsmPrinter::EmitXXStructorList(Constant *List) {
537 // Should be an array of '{ int, void ()* }' structs. The first value is the
538 // init priority, which we ignore.
539 if (!isa<ConstantArray>(List)) return;
540 ConstantArray *InitList = cast<ConstantArray>(List);
541 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
542 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
543 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
545 if (CS->getOperand(1)->isNullValue())
546 return; // Found a null terminator, exit printing.
547 // Emit the function pointer.
548 EmitGlobalConstant(CS->getOperand(1));
552 /// getGlobalLinkName - Returns the asm/link name of of the specified
553 /// global variable. Should be overridden by each target asm printer to
554 /// generate the appropriate value.
555 const std::string &AsmPrinter::getGlobalLinkName(const GlobalVariable *GV,
556 std::string &LinkName) const {
557 if (isa<Function>(GV)) {
558 LinkName += TAI->getFunctionAddrPrefix();
559 LinkName += Mang->getMangledName(GV);
560 LinkName += TAI->getFunctionAddrSuffix();
562 LinkName += TAI->getGlobalVarAddrPrefix();
563 LinkName += Mang->getMangledName(GV);
564 LinkName += TAI->getGlobalVarAddrSuffix();
570 /// EmitExternalGlobal - Emit the external reference to a global variable.
571 /// Should be overridden if an indirect reference should be used.
572 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
574 O << getGlobalLinkName(GV, GLN);
579 //===----------------------------------------------------------------------===//
580 /// LEB 128 number encoding.
582 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
583 /// representing an unsigned leb128 value.
584 void AsmPrinter::PrintULEB128(unsigned Value) const {
587 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
589 if (Value) Byte |= 0x80;
590 O << "0x" << utohex_buffer(Byte, Buffer+20);
591 if (Value) O << ", ";
595 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
596 /// representing a signed leb128 value.
597 void AsmPrinter::PrintSLEB128(int Value) const {
598 int Sign = Value >> (8 * sizeof(Value) - 1);
603 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
605 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
606 if (IsMore) Byte |= 0x80;
607 O << "0x" << utohex_buffer(Byte, Buffer+20);
608 if (IsMore) O << ", ";
612 //===--------------------------------------------------------------------===//
613 // Emission and print routines
616 /// PrintHex - Print a value as a hexidecimal value.
618 void AsmPrinter::PrintHex(int Value) const {
620 O << "0x" << utohex_buffer(static_cast<unsigned>(Value), Buffer+20);
623 /// EOL - Print a newline character to asm stream. If a comment is present
624 /// then it will be printed first. Comments should not contain '\n'.
625 void AsmPrinter::EOL() const {
629 void AsmPrinter::EOL(const std::string &Comment) const {
630 if (VerboseAsm && !Comment.empty()) {
632 << TAI->getCommentString()
639 void AsmPrinter::EOL(const char* Comment) const {
640 if (VerboseAsm && *Comment) {
642 << TAI->getCommentString()
649 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
650 /// unsigned leb128 value.
651 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
652 if (TAI->hasLEB128()) {
656 O << TAI->getData8bitsDirective();
661 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
662 /// signed leb128 value.
663 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
664 if (TAI->hasLEB128()) {
668 O << TAI->getData8bitsDirective();
673 /// EmitInt8 - Emit a byte directive and value.
675 void AsmPrinter::EmitInt8(int Value) const {
676 O << TAI->getData8bitsDirective();
677 PrintHex(Value & 0xFF);
680 /// EmitInt16 - Emit a short directive and value.
682 void AsmPrinter::EmitInt16(int Value) const {
683 O << TAI->getData16bitsDirective();
684 PrintHex(Value & 0xFFFF);
687 /// EmitInt32 - Emit a long directive and value.
689 void AsmPrinter::EmitInt32(int Value) const {
690 O << TAI->getData32bitsDirective();
694 /// EmitInt64 - Emit a long long directive and value.
696 void AsmPrinter::EmitInt64(uint64_t Value) const {
697 if (TAI->getData64bitsDirective()) {
698 O << TAI->getData64bitsDirective();
701 if (TM.getTargetData()->isBigEndian()) {
702 EmitInt32(unsigned(Value >> 32)); O << '\n';
703 EmitInt32(unsigned(Value));
705 EmitInt32(unsigned(Value)); O << '\n';
706 EmitInt32(unsigned(Value >> 32));
711 /// toOctal - Convert the low order bits of X into an octal digit.
713 static inline char toOctal(int X) {
717 /// printStringChar - Print a char, escaped if necessary.
719 static void printStringChar(formatted_raw_ostream &O, unsigned char C) {
722 } else if (C == '\\') {
724 } else if (isprint((unsigned char)C)) {
728 case '\b': O << "\\b"; break;
729 case '\f': O << "\\f"; break;
730 case '\n': O << "\\n"; break;
731 case '\r': O << "\\r"; break;
732 case '\t': O << "\\t"; break;
735 O << toOctal(C >> 6);
736 O << toOctal(C >> 3);
737 O << toOctal(C >> 0);
743 /// EmitString - Emit a string with quotes and a null terminator.
744 /// Special characters are emitted properly.
745 /// \literal (Eg. '\t') \endliteral
746 void AsmPrinter::EmitString(const std::string &String) const {
747 EmitString(String.c_str(), String.size());
750 void AsmPrinter::EmitString(const char *String, unsigned Size) const {
751 const char* AscizDirective = TAI->getAscizDirective();
755 O << TAI->getAsciiDirective();
757 for (unsigned i = 0; i < Size; ++i)
758 printStringChar(O, String[i]);
766 /// EmitFile - Emit a .file directive.
767 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
768 O << "\t.file\t" << Number << " \"";
769 for (unsigned i = 0, N = Name.size(); i < N; ++i)
770 printStringChar(O, Name[i]);
775 //===----------------------------------------------------------------------===//
777 // EmitAlignment - Emit an alignment directive to the specified power of
778 // two boundary. For example, if you pass in 3 here, you will get an 8
779 // byte alignment. If a global value is specified, and if that global has
780 // an explicit alignment requested, it will unconditionally override the
781 // alignment request. However, if ForcedAlignBits is specified, this value
782 // has final say: the ultimate alignment will be the max of ForcedAlignBits
783 // and the alignment computed with NumBits and the global.
787 // if (GV && GV->hasalignment) Align = GV->getalignment();
788 // Align = std::max(Align, ForcedAlignBits);
790 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
791 unsigned ForcedAlignBits,
792 bool UseFillExpr) const {
793 if (GV && GV->getAlignment())
794 NumBits = Log2_32(GV->getAlignment());
795 NumBits = std::max(NumBits, ForcedAlignBits);
797 if (NumBits == 0) return; // No need to emit alignment.
798 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
799 O << TAI->getAlignDirective() << NumBits;
801 unsigned FillValue = TAI->getTextAlignFillValue();
802 UseFillExpr &= IsInTextSection && FillValue;
811 /// EmitZeros - Emit a block of zeros.
813 void AsmPrinter::EmitZeros(uint64_t NumZeros, unsigned AddrSpace) const {
815 if (TAI->getZeroDirective()) {
816 O << TAI->getZeroDirective() << NumZeros;
817 if (TAI->getZeroDirectiveSuffix())
818 O << TAI->getZeroDirectiveSuffix();
821 for (; NumZeros; --NumZeros)
822 O << TAI->getData8bitsDirective(AddrSpace) << "0\n";
827 // Print out the specified constant, without a storage class. Only the
828 // constants valid in constant expressions can occur here.
829 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
830 if (CV->isNullValue() || isa<UndefValue>(CV))
832 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
833 O << CI->getZExtValue();
834 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
835 // This is a constant address for a global variable or function. Use the
836 // name of the variable or function as the address value, possibly
837 // decorating it with GlobalVarAddrPrefix/Suffix or
838 // FunctionAddrPrefix/Suffix (these all default to "" )
839 if (isa<Function>(GV)) {
840 O << TAI->getFunctionAddrPrefix()
841 << Mang->getMangledName(GV)
842 << TAI->getFunctionAddrSuffix();
844 O << TAI->getGlobalVarAddrPrefix()
845 << Mang->getMangledName(GV)
846 << TAI->getGlobalVarAddrSuffix();
848 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
849 const TargetData *TD = TM.getTargetData();
850 unsigned Opcode = CE->getOpcode();
852 case Instruction::GetElementPtr: {
853 // generate a symbolic expression for the byte address
854 const Constant *ptrVal = CE->getOperand(0);
855 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
856 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
858 // Truncate/sext the offset to the pointer size.
859 if (TD->getPointerSizeInBits() != 64) {
860 int SExtAmount = 64-TD->getPointerSizeInBits();
861 Offset = (Offset << SExtAmount) >> SExtAmount;
866 EmitConstantValueOnly(ptrVal);
868 O << ") + " << Offset;
870 O << ") - " << -Offset;
872 EmitConstantValueOnly(ptrVal);
876 case Instruction::Trunc:
877 case Instruction::ZExt:
878 case Instruction::SExt:
879 case Instruction::FPTrunc:
880 case Instruction::FPExt:
881 case Instruction::UIToFP:
882 case Instruction::SIToFP:
883 case Instruction::FPToUI:
884 case Instruction::FPToSI:
885 llvm_unreachable("FIXME: Don't yet support this kind of constant cast expr");
887 case Instruction::BitCast:
888 return EmitConstantValueOnly(CE->getOperand(0));
890 case Instruction::IntToPtr: {
891 // Handle casts to pointers by changing them into casts to the appropriate
892 // integer type. This promotes constant folding and simplifies this code.
893 Constant *Op = CE->getOperand(0);
894 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
895 return EmitConstantValueOnly(Op);
899 case Instruction::PtrToInt: {
900 // Support only foldable casts to/from pointers that can be eliminated by
901 // changing the pointer to the appropriately sized integer type.
902 Constant *Op = CE->getOperand(0);
903 const Type *Ty = CE->getType();
905 // We can emit the pointer value into this slot if the slot is an
906 // integer slot greater or equal to the size of the pointer.
907 if (TD->getTypeAllocSize(Ty) >= TD->getTypeAllocSize(Op->getType()))
908 return EmitConstantValueOnly(Op);
911 EmitConstantValueOnly(Op);
912 APInt ptrMask = APInt::getAllOnesValue(TD->getTypeAllocSizeInBits(Ty));
915 ptrMask.toStringUnsigned(S);
916 O << ") & " << S.c_str() << ')';
919 case Instruction::Add:
920 case Instruction::Sub:
921 case Instruction::And:
922 case Instruction::Or:
923 case Instruction::Xor:
925 EmitConstantValueOnly(CE->getOperand(0));
928 case Instruction::Add:
931 case Instruction::Sub:
934 case Instruction::And:
937 case Instruction::Or:
940 case Instruction::Xor:
947 EmitConstantValueOnly(CE->getOperand(1));
951 llvm_unreachable("Unsupported operator!");
954 llvm_unreachable("Unknown constant value!");
958 /// printAsCString - Print the specified array as a C compatible string, only if
959 /// the predicate isString is true.
961 static void printAsCString(formatted_raw_ostream &O, const ConstantArray *CVA,
963 assert(CVA->isString() && "Array is not string compatible!");
966 for (unsigned i = 0; i != LastElt; ++i) {
968 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
969 printStringChar(O, C);
974 /// EmitString - Emit a zero-byte-terminated string constant.
976 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
977 unsigned NumElts = CVA->getNumOperands();
978 if (TAI->getAscizDirective() && NumElts &&
979 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
980 O << TAI->getAscizDirective();
981 printAsCString(O, CVA, NumElts-1);
983 O << TAI->getAsciiDirective();
984 printAsCString(O, CVA, NumElts);
989 void AsmPrinter::EmitGlobalConstantArray(const ConstantArray *CVA,
990 unsigned AddrSpace) {
991 if (CVA->isString()) {
993 } else { // Not a string. Print the values in successive locations
994 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
995 EmitGlobalConstant(CVA->getOperand(i), AddrSpace);
999 void AsmPrinter::EmitGlobalConstantVector(const ConstantVector *CP) {
1000 const VectorType *PTy = CP->getType();
1002 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
1003 EmitGlobalConstant(CP->getOperand(I));
1006 void AsmPrinter::EmitGlobalConstantStruct(const ConstantStruct *CVS,
1007 unsigned AddrSpace) {
1008 // Print the fields in successive locations. Pad to align if needed!
1009 const TargetData *TD = TM.getTargetData();
1010 unsigned Size = TD->getTypeAllocSize(CVS->getType());
1011 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
1012 uint64_t sizeSoFar = 0;
1013 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
1014 const Constant* field = CVS->getOperand(i);
1016 // Check if padding is needed and insert one or more 0s.
1017 uint64_t fieldSize = TD->getTypeAllocSize(field->getType());
1018 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
1019 - cvsLayout->getElementOffset(i)) - fieldSize;
1020 sizeSoFar += fieldSize + padSize;
1022 // Now print the actual field value.
1023 EmitGlobalConstant(field, AddrSpace);
1025 // Insert padding - this may include padding to increase the size of the
1026 // current field up to the ABI size (if the struct is not packed) as well
1027 // as padding to ensure that the next field starts at the right offset.
1028 EmitZeros(padSize, AddrSpace);
1030 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
1031 "Layout of constant struct may be incorrect!");
1034 void AsmPrinter::EmitGlobalConstantFP(const ConstantFP *CFP,
1035 unsigned AddrSpace) {
1036 // FP Constants are printed as integer constants to avoid losing
1038 const TargetData *TD = TM.getTargetData();
1039 if (CFP->getType() == Type::DoubleTy) {
1040 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
1041 uint64_t i = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
1042 if (TAI->getData64bitsDirective(AddrSpace)) {
1043 O << TAI->getData64bitsDirective(AddrSpace) << i;
1045 O << '\t' << TAI->getCommentString() << " double value: " << Val;
1047 } else if (TD->isBigEndian()) {
1048 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
1050 O << '\t' << TAI->getCommentString()
1051 << " double most significant word " << Val;
1053 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
1055 O << '\t' << TAI->getCommentString()
1056 << " double least significant word " << Val;
1059 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
1061 O << '\t' << TAI->getCommentString()
1062 << " double least significant word " << Val;
1064 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
1066 O << '\t' << TAI->getCommentString()
1067 << " double most significant word " << Val;
1071 } else if (CFP->getType() == Type::FloatTy) {
1072 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
1073 O << TAI->getData32bitsDirective(AddrSpace)
1074 << CFP->getValueAPF().bitcastToAPInt().getZExtValue();
1076 O << '\t' << TAI->getCommentString() << " float " << Val;
1079 } else if (CFP->getType() == Type::X86_FP80Ty) {
1080 // all long double variants are printed as hex
1081 // api needed to prevent premature destruction
1082 APInt api = CFP->getValueAPF().bitcastToAPInt();
1083 const uint64_t *p = api.getRawData();
1084 // Convert to double so we can print the approximate val as a comment.
1085 APFloat DoubleVal = CFP->getValueAPF();
1087 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
1089 if (TD->isBigEndian()) {
1090 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
1092 O << '\t' << TAI->getCommentString()
1093 << " long double most significant halfword of ~"
1094 << DoubleVal.convertToDouble();
1096 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
1098 O << '\t' << TAI->getCommentString() << " long double next halfword";
1100 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
1102 O << '\t' << TAI->getCommentString() << " long double next halfword";
1104 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
1106 O << '\t' << TAI->getCommentString() << " long double next halfword";
1108 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
1110 O << '\t' << TAI->getCommentString()
1111 << " long double least significant halfword";
1114 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
1116 O << '\t' << TAI->getCommentString()
1117 << " long double least significant halfword of ~"
1118 << DoubleVal.convertToDouble();
1120 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
1122 O << '\t' << TAI->getCommentString()
1123 << " long double next halfword";
1125 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
1127 O << '\t' << TAI->getCommentString()
1128 << " long double next halfword";
1130 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
1132 O << '\t' << TAI->getCommentString()
1133 << " long double next halfword";
1135 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
1137 O << '\t' << TAI->getCommentString()
1138 << " long double most significant halfword";
1141 EmitZeros(TD->getTypeAllocSize(Type::X86_FP80Ty) -
1142 TD->getTypeStoreSize(Type::X86_FP80Ty), AddrSpace);
1144 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1145 // all long double variants are printed as hex
1146 // api needed to prevent premature destruction
1147 APInt api = CFP->getValueAPF().bitcastToAPInt();
1148 const uint64_t *p = api.getRawData();
1149 if (TD->isBigEndian()) {
1150 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
1152 O << '\t' << TAI->getCommentString()
1153 << " long double most significant word";
1155 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
1157 O << '\t' << TAI->getCommentString()
1158 << " long double next word";
1160 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
1162 O << '\t' << TAI->getCommentString()
1163 << " long double next word";
1165 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
1167 O << '\t' << TAI->getCommentString()
1168 << " long double least significant word";
1171 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
1173 O << '\t' << TAI->getCommentString()
1174 << " long double least significant word";
1176 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
1178 O << '\t' << TAI->getCommentString()
1179 << " long double next word";
1181 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
1183 O << '\t' << TAI->getCommentString()
1184 << " long double next word";
1186 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
1188 O << '\t' << TAI->getCommentString()
1189 << " long double most significant word";
1193 } else llvm_unreachable("Floating point constant type not handled");
1196 void AsmPrinter::EmitGlobalConstantLargeInt(const ConstantInt *CI,
1197 unsigned AddrSpace) {
1198 const TargetData *TD = TM.getTargetData();
1199 unsigned BitWidth = CI->getBitWidth();
1200 assert(isPowerOf2_32(BitWidth) &&
1201 "Non-power-of-2-sized integers not handled!");
1203 // We don't expect assemblers to support integer data directives
1204 // for more than 64 bits, so we emit the data in at most 64-bit
1205 // quantities at a time.
1206 const uint64_t *RawData = CI->getValue().getRawData();
1207 for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
1209 if (TD->isBigEndian())
1210 Val = RawData[e - i - 1];
1214 if (TAI->getData64bitsDirective(AddrSpace))
1215 O << TAI->getData64bitsDirective(AddrSpace) << Val << '\n';
1216 else if (TD->isBigEndian()) {
1217 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
1219 O << '\t' << TAI->getCommentString()
1220 << " Double-word most significant word " << Val;
1222 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
1224 O << '\t' << TAI->getCommentString()
1225 << " Double-word least significant word " << Val;
1228 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
1230 O << '\t' << TAI->getCommentString()
1231 << " Double-word least significant word " << Val;
1233 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
1235 O << '\t' << TAI->getCommentString()
1236 << " Double-word most significant word " << Val;
1242 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
1243 void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) {
1244 const TargetData *TD = TM.getTargetData();
1245 const Type *type = CV->getType();
1246 unsigned Size = TD->getTypeAllocSize(type);
1248 if (CV->isNullValue() || isa<UndefValue>(CV)) {
1249 EmitZeros(Size, AddrSpace);
1251 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
1252 EmitGlobalConstantArray(CVA , AddrSpace);
1254 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
1255 EmitGlobalConstantStruct(CVS, AddrSpace);
1257 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
1258 EmitGlobalConstantFP(CFP, AddrSpace);
1260 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1261 // Small integers are handled below; large integers are handled here.
1263 EmitGlobalConstantLargeInt(CI, AddrSpace);
1266 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1267 EmitGlobalConstantVector(CP);
1271 printDataDirective(type, AddrSpace);
1272 EmitConstantValueOnly(CV);
1274 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1276 CI->getValue().toStringUnsigned(S, 16);
1277 O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
1283 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1284 // Target doesn't support this yet!
1285 llvm_unreachable("Target does not support EmitMachineConstantPoolValue");
1288 /// PrintSpecial - Print information related to the specified machine instr
1289 /// that is independent of the operand, and may be independent of the instr
1290 /// itself. This can be useful for portably encoding the comment character
1291 /// or other bits of target-specific knowledge into the asmstrings. The
1292 /// syntax used is ${:comment}. Targets can override this to add support
1293 /// for their own strange codes.
1294 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) const {
1295 if (!strcmp(Code, "private")) {
1296 O << TAI->getPrivateGlobalPrefix();
1297 } else if (!strcmp(Code, "comment")) {
1299 O << TAI->getCommentString();
1300 } else if (!strcmp(Code, "uid")) {
1301 // Comparing the address of MI isn't sufficient, because machineinstrs may
1302 // be allocated to the same address across functions.
1303 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1305 // If this is a new LastFn instruction, bump the counter.
1306 if (LastMI != MI || LastFn != ThisF) {
1314 raw_string_ostream Msg(msg);
1315 Msg << "Unknown special formatter '" << Code
1316 << "' for machine instr: " << *MI;
1317 llvm_report_error(Msg.str());
1321 /// processDebugLoc - Processes the debug information of each machine
1322 /// instruction's DebugLoc.
1323 void AsmPrinter::processDebugLoc(DebugLoc DL) {
1324 if (TAI->doesSupportDebugInformation() && DW->ShouldEmitDwarfDebug()) {
1325 if (!DL.isUnknown()) {
1326 DebugLocTuple CurDLT = MF->getDebugLocTuple(DL);
1328 if (CurDLT.CompileUnit != 0 && PrevDLT != CurDLT)
1329 printLabel(DW->RecordSourceLine(CurDLT.Line, CurDLT.Col,
1330 DICompileUnit(CurDLT.CompileUnit)));
1337 /// printInlineAsm - This method formats and prints the specified machine
1338 /// instruction that is an inline asm.
1339 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1340 unsigned NumOperands = MI->getNumOperands();
1342 // Count the number of register definitions.
1343 unsigned NumDefs = 0;
1344 for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
1346 assert(NumDefs != NumOperands-1 && "No asm string?");
1348 assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
1350 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1351 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1353 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1354 // These are useful to see where empty asm's wound up.
1355 if (AsmStr[0] == 0) {
1356 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1360 O << TAI->getInlineAsmStart() << "\n\t";
1362 // The variant of the current asmprinter.
1363 int AsmPrinterVariant = TAI->getAssemblerDialect();
1365 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1366 const char *LastEmitted = AsmStr; // One past the last character emitted.
1368 while (*LastEmitted) {
1369 switch (*LastEmitted) {
1371 // Not a special case, emit the string section literally.
1372 const char *LiteralEnd = LastEmitted+1;
1373 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1374 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1376 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1377 O.write(LastEmitted, LiteralEnd-LastEmitted);
1378 LastEmitted = LiteralEnd;
1382 ++LastEmitted; // Consume newline character.
1383 O << '\n'; // Indent code with newline.
1386 ++LastEmitted; // Consume '$' character.
1390 switch (*LastEmitted) {
1391 default: Done = false; break;
1392 case '$': // $$ -> $
1393 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1395 ++LastEmitted; // Consume second '$' character.
1397 case '(': // $( -> same as GCC's { character.
1398 ++LastEmitted; // Consume '(' character.
1399 if (CurVariant != -1) {
1400 llvm_report_error("Nested variants found in inline asm string: '"
1401 + std::string(AsmStr) + "'");
1403 CurVariant = 0; // We're in the first variant now.
1406 ++LastEmitted; // consume '|' character.
1407 if (CurVariant == -1)
1408 O << '|'; // this is gcc's behavior for | outside a variant
1410 ++CurVariant; // We're in the next variant.
1412 case ')': // $) -> same as GCC's } char.
1413 ++LastEmitted; // consume ')' character.
1414 if (CurVariant == -1)
1415 O << '}'; // this is gcc's behavior for } outside a variant
1422 bool HasCurlyBraces = false;
1423 if (*LastEmitted == '{') { // ${variable}
1424 ++LastEmitted; // Consume '{' character.
1425 HasCurlyBraces = true;
1428 // If we have ${:foo}, then this is not a real operand reference, it is a
1429 // "magic" string reference, just like in .td files. Arrange to call
1431 if (HasCurlyBraces && *LastEmitted == ':') {
1433 const char *StrStart = LastEmitted;
1434 const char *StrEnd = strchr(StrStart, '}');
1436 llvm_report_error("Unterminated ${:foo} operand in inline asm string: '"
1437 + std::string(AsmStr) + "'");
1440 std::string Val(StrStart, StrEnd);
1441 PrintSpecial(MI, Val.c_str());
1442 LastEmitted = StrEnd+1;
1446 const char *IDStart = LastEmitted;
1449 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1450 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1451 llvm_report_error("Bad $ operand number in inline asm string: '"
1452 + std::string(AsmStr) + "'");
1454 LastEmitted = IDEnd;
1456 char Modifier[2] = { 0, 0 };
1458 if (HasCurlyBraces) {
1459 // If we have curly braces, check for a modifier character. This
1460 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1461 if (*LastEmitted == ':') {
1462 ++LastEmitted; // Consume ':' character.
1463 if (*LastEmitted == 0) {
1464 llvm_report_error("Bad ${:} expression in inline asm string: '"
1465 + std::string(AsmStr) + "'");
1468 Modifier[0] = *LastEmitted;
1469 ++LastEmitted; // Consume modifier character.
1472 if (*LastEmitted != '}') {
1473 llvm_report_error("Bad ${} expression in inline asm string: '"
1474 + std::string(AsmStr) + "'");
1476 ++LastEmitted; // Consume '}' character.
1479 if ((unsigned)Val >= NumOperands-1) {
1480 llvm_report_error("Invalid $ operand number in inline asm string: '"
1481 + std::string(AsmStr) + "'");
1484 // Okay, we finally have a value number. Ask the target to print this
1486 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1491 // Scan to find the machine operand number for the operand.
1492 for (; Val; --Val) {
1493 if (OpNo >= MI->getNumOperands()) break;
1494 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1495 OpNo += InlineAsm::getNumOperandRegisters(OpFlags) + 1;
1498 if (OpNo >= MI->getNumOperands()) {
1501 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1502 ++OpNo; // Skip over the ID number.
1504 if (Modifier[0]=='l') // labels are target independent
1505 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1506 false, false, false);
1508 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1509 if ((OpFlags & 7) == 4) {
1510 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1511 Modifier[0] ? Modifier : 0);
1513 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1514 Modifier[0] ? Modifier : 0);
1520 raw_string_ostream Msg(msg);
1521 Msg << "Invalid operand found in inline asm: '"
1524 llvm_report_error(Msg.str());
1531 O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1534 /// printImplicitDef - This method prints the specified machine instruction
1535 /// that is an implicit def.
1536 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1538 O << '\t' << TAI->getCommentString() << " implicit-def: "
1539 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1542 /// printLabel - This method prints a local label used by debug and
1543 /// exception handling tables.
1544 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1545 printLabel(MI->getOperand(0).getImm());
1548 void AsmPrinter::printLabel(unsigned Id) const {
1549 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1552 /// printDeclare - This method prints a local variable declaration used by
1554 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1555 /// entry into dwarf table.
1556 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1557 unsigned FI = MI->getOperand(0).getIndex();
1558 GlobalValue *GV = MI->getOperand(1).getGlobal();
1559 DW->RecordVariable(cast<GlobalVariable>(GV), FI, MI);
1562 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1563 /// instruction, using the specified assembler variant. Targets should
1564 /// overried this to format as appropriate.
1565 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1566 unsigned AsmVariant, const char *ExtraCode) {
1567 // Target doesn't support this yet!
1571 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1572 unsigned AsmVariant,
1573 const char *ExtraCode) {
1574 // Target doesn't support this yet!
1578 /// printBasicBlockLabel - This method prints the label for the specified
1579 /// MachineBasicBlock
1580 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1583 bool printComment) const {
1585 unsigned Align = MBB->getAlignment();
1587 EmitAlignment(Log2_32(Align));
1590 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1591 << MBB->getNumber();
1594 if (printComment && MBB->getBasicBlock())
1595 O << '\t' << TAI->getCommentString() << ' '
1596 << MBB->getBasicBlock()->getNameStart();
1599 /// printPICJumpTableSetLabel - This method prints a set label for the
1600 /// specified MachineBasicBlock for a jumptable entry.
1601 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1602 const MachineBasicBlock *MBB) const {
1603 if (!TAI->getSetDirective())
1606 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1607 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1608 printBasicBlockLabel(MBB, false, false, false);
1609 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1610 << '_' << uid << '\n';
1613 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1614 const MachineBasicBlock *MBB) const {
1615 if (!TAI->getSetDirective())
1618 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1619 << getFunctionNumber() << '_' << uid << '_' << uid2
1620 << "_set_" << MBB->getNumber() << ',';
1621 printBasicBlockLabel(MBB, false, false, false);
1622 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1623 << '_' << uid << '_' << uid2 << '\n';
1626 /// printDataDirective - This method prints the asm directive for the
1628 void AsmPrinter::printDataDirective(const Type *type, unsigned AddrSpace) {
1629 const TargetData *TD = TM.getTargetData();
1630 switch (type->getTypeID()) {
1631 case Type::FloatTyID: case Type::DoubleTyID:
1632 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1633 assert(0 && "Should have already output floating point constant.");
1635 assert(0 && "Can't handle printing this type of thing");
1636 case Type::IntegerTyID: {
1637 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1639 O << TAI->getData8bitsDirective(AddrSpace);
1640 else if (BitWidth <= 16)
1641 O << TAI->getData16bitsDirective(AddrSpace);
1642 else if (BitWidth <= 32)
1643 O << TAI->getData32bitsDirective(AddrSpace);
1644 else if (BitWidth <= 64) {
1645 assert(TAI->getData64bitsDirective(AddrSpace) &&
1646 "Target cannot handle 64-bit constant exprs!");
1647 O << TAI->getData64bitsDirective(AddrSpace);
1649 llvm_unreachable("Target cannot handle given data directive width!");
1653 case Type::PointerTyID:
1654 if (TD->getPointerSize() == 8) {
1655 assert(TAI->getData64bitsDirective(AddrSpace) &&
1656 "Target cannot handle 64-bit pointer exprs!");
1657 O << TAI->getData64bitsDirective(AddrSpace);
1658 } else if (TD->getPointerSize() == 2) {
1659 O << TAI->getData16bitsDirective(AddrSpace);
1660 } else if (TD->getPointerSize() == 1) {
1661 O << TAI->getData8bitsDirective(AddrSpace);
1663 O << TAI->getData32bitsDirective(AddrSpace);
1669 void AsmPrinter::printVisibility(const std::string& Name,
1670 unsigned Visibility) const {
1671 if (Visibility == GlobalValue::HiddenVisibility) {
1672 if (const char *Directive = TAI->getHiddenDirective())
1673 O << Directive << Name << '\n';
1674 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1675 if (const char *Directive = TAI->getProtectedDirective())
1676 O << Directive << Name << '\n';
1680 void AsmPrinter::printOffset(int64_t Offset) const {
1683 else if (Offset < 0)
1687 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
1688 if (!S->usesMetadata())
1691 gcp_iterator GCPI = GCMetadataPrinters.find(S);
1692 if (GCPI != GCMetadataPrinters.end())
1693 return GCPI->second;
1695 const char *Name = S->getName().c_str();
1697 for (GCMetadataPrinterRegistry::iterator
1698 I = GCMetadataPrinterRegistry::begin(),
1699 E = GCMetadataPrinterRegistry::end(); I != E; ++I)
1700 if (strcmp(Name, I->getName()) == 0) {
1701 GCMetadataPrinter *GMP = I->instantiate();
1703 GCMetadataPrinters.insert(std::make_pair(S, GMP));
1707 cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";
1708 llvm_unreachable(0);
1711 /// EmitComments - Pretty-print comments for instructions
1712 void AsmPrinter::EmitComments(const MachineInstr &MI) const
1715 if (!MI.getDebugLoc().isUnknown()) {
1716 DebugLocTuple DLT = MF->getDebugLocTuple(MI.getDebugLoc());
1718 // Print source line info
1719 O.PadToColumn(TAI->getCommentColumn(), 1);
1720 O << TAI->getCommentString() << " SrcLine ";
1721 if (DLT.CompileUnit->hasInitializer()) {
1722 Constant *Name = DLT.CompileUnit->getInitializer();
1723 if (ConstantArray *NameString = dyn_cast<ConstantArray>(Name))
1724 if (NameString->isString()) {
1725 O << NameString->getAsString() << " ";
1730 O << ":" << DLT.Col;
1735 /// EmitComments - Pretty-print comments for instructions
1736 void AsmPrinter::EmitComments(const MCInst &MI) const
1739 if (!MI.getDebugLoc().isUnknown()) {
1740 DebugLocTuple DLT = MF->getDebugLocTuple(MI.getDebugLoc());
1742 // Print source line info
1743 O.PadToColumn(TAI->getCommentColumn(), 1);
1744 O << TAI->getCommentString() << " SrcLine ";
1745 if (DLT.CompileUnit->hasInitializer()) {
1746 Constant *Name = DLT.CompileUnit->getInitializer();
1747 if (ConstantArray *NameString = dyn_cast<ConstantArray>(Name))
1748 if (NameString->isString()) {
1749 O << NameString->getAsString() << " ";
1754 O << ":" << DLT.Col;