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/Support/FormattedStream.h"
31 #include "llvm/Target/TargetAsmInfo.h"
32 #include "llvm/Target/TargetData.h"
33 #include "llvm/Target/TargetLowering.h"
34 #include "llvm/Target/TargetOptions.h"
35 #include "llvm/Target/TargetRegisterInfo.h"
36 #include "llvm/ADT/SmallPtrSet.h"
37 #include "llvm/ADT/SmallString.h"
38 #include "llvm/ADT/StringExtras.h"
42 static cl::opt<cl::boolOrDefault>
43 AsmVerbose("asm-verbose", cl::desc("Add comments to directives."),
44 cl::init(cl::BOU_UNSET));
46 char AsmPrinter::ID = 0;
47 AsmPrinter::AsmPrinter(formatted_raw_ostream &o, TargetMachine &tm,
48 const TargetAsmInfo *T, bool VDef)
49 : MachineFunctionPass(&ID), FunctionNumber(0), O(o),
50 TM(tm), TAI(T), TRI(tm.getRegisterInfo()),
51 IsInTextSection(false), LastMI(0), LastFn(0), Counter(~0U),
52 PrevDLT(0, ~0U, ~0U) {
55 case cl::BOU_UNSET: VerboseAsm = VDef; break;
56 case cl::BOU_TRUE: VerboseAsm = true; break;
57 case cl::BOU_FALSE: VerboseAsm = false; break;
61 AsmPrinter::~AsmPrinter() {
62 for (gcp_iterator I = GCMetadataPrinters.begin(),
63 E = GCMetadataPrinters.end(); I != E; ++I)
67 /// SwitchToTextSection - Switch to the specified text section of the executable
68 /// if we are not already in it!
70 void AsmPrinter::SwitchToTextSection(const char *NewSection,
71 const GlobalValue *GV) {
73 if (GV && GV->hasSection())
74 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
78 // If we're already in this section, we're done.
79 if (CurrentSection == NS) return;
81 // Close the current section, if applicable.
82 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
83 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
87 if (!CurrentSection.empty())
88 O << CurrentSection << TAI->getTextSectionStartSuffix() << '\n';
90 IsInTextSection = true;
93 /// SwitchToDataSection - Switch to the specified data section of the executable
94 /// if we are not already in it!
96 void AsmPrinter::SwitchToDataSection(const char *NewSection,
97 const GlobalValue *GV) {
99 if (GV && GV->hasSection())
100 NS = TAI->getSwitchToSectionDirective() + GV->getSection();
104 // If we're already in this section, we're done.
105 if (CurrentSection == NS) return;
107 // Close the current section, if applicable.
108 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
109 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
113 if (!CurrentSection.empty())
114 O << CurrentSection << TAI->getDataSectionStartSuffix() << '\n';
116 IsInTextSection = false;
119 /// SwitchToSection - Switch to the specified section of the executable if we
120 /// are not already in it!
121 void AsmPrinter::SwitchToSection(const Section* NS) {
122 const std::string& NewSection = NS->getName();
124 // If we're already in this section, we're done.
125 if (CurrentSection == NewSection) return;
127 // Close the current section, if applicable.
128 if (TAI->getSectionEndDirectiveSuffix() && !CurrentSection.empty())
129 O << CurrentSection << TAI->getSectionEndDirectiveSuffix() << '\n';
131 // FIXME: Make CurrentSection a Section* in the future
132 CurrentSection = NewSection;
133 CurrentSection_ = NS;
135 if (!CurrentSection.empty()) {
136 // If section is named we need to switch into it via special '.section'
137 // directive and also append funky flags. Otherwise - section name is just
138 // some magic assembler directive.
140 O << TAI->getSwitchToSectionDirective()
142 << TAI->getSectionFlags(NS->getFlags());
145 O << TAI->getDataSectionStartSuffix() << '\n';
148 IsInTextSection = (NS->getFlags() & SectionFlags::Code);
151 void AsmPrinter::getAnalysisUsage(AnalysisUsage &AU) const {
152 MachineFunctionPass::getAnalysisUsage(AU);
153 AU.addRequired<GCModuleInfo>();
156 bool AsmPrinter::doInitialization(Module &M) {
157 Mang = new Mangler(M, TAI->getGlobalPrefix(), TAI->getPrivateGlobalPrefix());
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 final debug information.
199 if (TAI->doesSupportDebugInformation() || TAI->doesSupportExceptionHandling())
202 // If the target wants to know about weak references, print them all.
203 if (TAI->getWeakRefDirective()) {
204 // FIXME: This is not lazy, it would be nice to only print weak references
205 // to stuff that is actually used. Note that doing so would require targets
206 // to notice uses in operands (due to constant exprs etc). This should
207 // happen with the MC stuff eventually.
208 SwitchToDataSection("");
210 // Print out module-level global variables here.
211 for (Module::const_global_iterator I = M.global_begin(), E = M.global_end();
213 if (I->hasExternalWeakLinkage())
214 O << TAI->getWeakRefDirective() << Mang->getMangledName(I) << '\n';
217 for (Module::const_iterator I = M.begin(), E = M.end();
219 if (I->hasExternalWeakLinkage())
220 O << TAI->getWeakRefDirective() << Mang->getMangledName(I) << '\n';
224 if (TAI->getSetDirective()) {
225 if (!M.alias_empty())
226 SwitchToSection(TAI->getTextSection());
229 for (Module::const_alias_iterator I = M.alias_begin(), E = M.alias_end();
231 std::string Name = Mang->getMangledName(I);
233 const GlobalValue *GV = cast<GlobalValue>(I->getAliasedGlobal());
234 std::string Target = Mang->getMangledName(GV);
236 if (I->hasExternalLinkage() || !TAI->getWeakRefDirective())
237 O << "\t.globl\t" << Name << '\n';
238 else if (I->hasWeakLinkage())
239 O << TAI->getWeakRefDirective() << Name << '\n';
240 else if (!I->hasLocalLinkage())
241 llvm_unreachable("Invalid alias linkage");
243 printVisibility(Name, I->getVisibility());
245 O << TAI->getSetDirective() << ' ' << Name << ", " << Target << '\n';
249 GCModuleInfo *MI = getAnalysisIfAvailable<GCModuleInfo>();
250 assert(MI && "AsmPrinter didn't require GCModuleInfo?");
251 for (GCModuleInfo::iterator I = MI->end(), E = MI->begin(); I != E; )
252 if (GCMetadataPrinter *MP = GetOrCreateGCPrinter(*--I))
253 MP->finishAssembly(O, *this, *TAI);
255 // If we don't have any trampolines, then we don't require stack memory
256 // to be executable. Some targets have a directive to declare this.
257 Function *InitTrampolineIntrinsic = M.getFunction("llvm.init.trampoline");
258 if (!InitTrampolineIntrinsic || InitTrampolineIntrinsic->use_empty())
259 if (TAI->getNonexecutableStackDirective())
260 O << TAI->getNonexecutableStackDirective() << '\n';
262 delete Mang; Mang = 0;
268 AsmPrinter::getCurrentFunctionEHName(const MachineFunction *MF) const {
269 assert(MF && "No machine function?");
270 return Mang->getMangledName(MF->getFunction(), ".eh",
271 TAI->is_EHSymbolPrivate());
274 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
275 // What's my mangled name?
276 CurrentFnName = Mang->getMangledName(MF.getFunction());
277 IncrementFunctionNumber();
281 // SectionCPs - Keep track the alignment, constpool entries per Section.
285 SmallVector<unsigned, 4> CPEs;
286 SectionCPs(const Section *s, unsigned a) : S(s), Alignment(a) {};
290 /// EmitConstantPool - Print to the current output stream assembly
291 /// representations of the constants in the constant pool MCP. This is
292 /// used to print out constants which have been "spilled to memory" by
293 /// the code generator.
295 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
296 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
297 if (CP.empty()) return;
299 // Calculate sections for constant pool entries. We collect entries to go into
300 // the same section together to reduce amount of section switch statements.
301 SmallVector<SectionCPs, 4> CPSections;
302 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
303 MachineConstantPoolEntry CPE = CP[i];
304 unsigned Align = CPE.getAlignment();
305 const Section* S = TAI->SelectSectionForMachineConst(CPE.getType());
306 // The number of sections are small, just do a linear search from the
307 // last section to the first.
309 unsigned SecIdx = CPSections.size();
310 while (SecIdx != 0) {
311 if (CPSections[--SecIdx].S == S) {
317 SecIdx = CPSections.size();
318 CPSections.push_back(SectionCPs(S, Align));
321 if (Align > CPSections[SecIdx].Alignment)
322 CPSections[SecIdx].Alignment = Align;
323 CPSections[SecIdx].CPEs.push_back(i);
326 // Now print stuff into the calculated sections.
327 for (unsigned i = 0, e = CPSections.size(); i != e; ++i) {
328 SwitchToSection(CPSections[i].S);
329 EmitAlignment(Log2_32(CPSections[i].Alignment));
332 for (unsigned j = 0, ee = CPSections[i].CPEs.size(); j != ee; ++j) {
333 unsigned CPI = CPSections[i].CPEs[j];
334 MachineConstantPoolEntry CPE = CP[CPI];
336 // Emit inter-object padding for alignment.
337 unsigned AlignMask = CPE.getAlignment() - 1;
338 unsigned NewOffset = (Offset + AlignMask) & ~AlignMask;
339 EmitZeros(NewOffset - Offset);
341 const Type *Ty = CPE.getType();
342 Offset = NewOffset + TM.getTargetData()->getTypeAllocSize(Ty);
344 O << TAI->getPrivateGlobalPrefix() << "CPI" << getFunctionNumber() << '_'
345 << CPI << ":\t\t\t\t\t";
347 O << TAI->getCommentString() << ' ';
348 WriteTypeSymbolic(O, CPE.getType(), 0);
351 if (CPE.isMachineConstantPoolEntry())
352 EmitMachineConstantPoolValue(CPE.Val.MachineCPVal);
354 EmitGlobalConstant(CPE.Val.ConstVal);
359 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
360 /// by the current function to the current output stream.
362 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI,
363 MachineFunction &MF) {
364 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
365 if (JT.empty()) return;
367 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
369 // Pick the directive to use to print the jump table entries, and switch to
370 // the appropriate section.
371 TargetLowering *LoweringInfo = TM.getTargetLowering();
373 const char* JumpTableDataSection = TAI->getJumpTableDataSection();
374 const Function *F = MF.getFunction();
375 unsigned SectionFlags = TAI->SectionFlagsForGlobal(F);
376 bool JTInDiffSection = false;
377 if ((IsPic && !(LoweringInfo && LoweringInfo->usesGlobalOffsetTable())) ||
378 !JumpTableDataSection ||
379 SectionFlags & SectionFlags::Linkonce) {
380 // In PIC mode, we need to emit the jump table to the same section as the
381 // function body itself, otherwise the label differences won't make sense.
382 // We should also do if the section name is NULL or function is declared in
383 // discardable section.
384 SwitchToSection(TAI->SectionForGlobal(F));
386 SwitchToDataSection(JumpTableDataSection);
387 JTInDiffSection = true;
390 EmitAlignment(Log2_32(MJTI->getAlignment()));
392 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
393 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
395 // If this jump table was deleted, ignore it.
396 if (JTBBs.empty()) continue;
398 // For PIC codegen, if possible we want to use the SetDirective to reduce
399 // the number of relocations the assembler will generate for the jump table.
400 // Set directives are all printed before the jump table itself.
401 SmallPtrSet<MachineBasicBlock*, 16> EmittedSets;
402 if (TAI->getSetDirective() && IsPic)
403 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii)
404 if (EmittedSets.insert(JTBBs[ii]))
405 printPICJumpTableSetLabel(i, JTBBs[ii]);
407 // On some targets (e.g. darwin) we want to emit two consequtive labels
408 // before each jump table. The first label is never referenced, but tells
409 // the assembler and linker the extents of the jump table object. The
410 // second label is actually referenced by the code.
411 if (JTInDiffSection) {
412 if (const char *JTLabelPrefix = TAI->getJumpTableSpecialLabelPrefix())
413 O << JTLabelPrefix << "JTI" << getFunctionNumber() << '_' << i << ":\n";
416 O << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
417 << '_' << i << ":\n";
419 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
420 printPICJumpTableEntry(MJTI, JTBBs[ii], i);
426 void AsmPrinter::printPICJumpTableEntry(const MachineJumpTableInfo *MJTI,
427 const MachineBasicBlock *MBB,
428 unsigned uid) const {
429 bool IsPic = TM.getRelocationModel() == Reloc::PIC_;
431 // Use JumpTableDirective otherwise honor the entry size from the jump table
433 const char *JTEntryDirective = TAI->getJumpTableDirective();
434 bool HadJTEntryDirective = JTEntryDirective != NULL;
435 if (!HadJTEntryDirective) {
436 JTEntryDirective = MJTI->getEntrySize() == 4 ?
437 TAI->getData32bitsDirective() : TAI->getData64bitsDirective();
440 O << JTEntryDirective << ' ';
442 // If we have emitted set directives for the jump table entries, print
443 // them rather than the entries themselves. If we're emitting PIC, then
444 // emit the table entries as differences between two text section labels.
445 // If we're emitting non-PIC code, then emit the entries as direct
446 // references to the target basic blocks.
448 if (TAI->getSetDirective()) {
449 O << TAI->getPrivateGlobalPrefix() << getFunctionNumber()
450 << '_' << uid << "_set_" << MBB->getNumber();
452 printBasicBlockLabel(MBB, false, false, false);
453 // If the arch uses custom Jump Table directives, don't calc relative to
455 if (!HadJTEntryDirective)
456 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI"
457 << getFunctionNumber() << '_' << uid;
460 printBasicBlockLabel(MBB, false, false, false);
465 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
466 /// special global used by LLVM. If so, emit it and return true, otherwise
467 /// do nothing and return false.
468 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
469 if (GV->getName() == "llvm.used") {
470 if (TAI->getUsedDirective() != 0) // No need to emit this at all.
471 EmitLLVMUsedList(GV->getInitializer());
475 // Ignore debug and non-emitted data.
476 if (GV->getSection() == "llvm.metadata" ||
477 GV->hasAvailableExternallyLinkage())
480 if (!GV->hasAppendingLinkage()) return false;
482 assert(GV->hasInitializer() && "Not a special LLVM global!");
484 const TargetData *TD = TM.getTargetData();
485 unsigned Align = Log2_32(TD->getPointerPrefAlignment());
486 if (GV->getName() == "llvm.global_ctors") {
487 SwitchToDataSection(TAI->getStaticCtorsSection());
488 EmitAlignment(Align, 0);
489 EmitXXStructorList(GV->getInitializer());
493 if (GV->getName() == "llvm.global_dtors") {
494 SwitchToDataSection(TAI->getStaticDtorsSection());
495 EmitAlignment(Align, 0);
496 EmitXXStructorList(GV->getInitializer());
503 /// EmitLLVMUsedList - For targets that define a TAI::UsedDirective, mark each
504 /// global in the specified llvm.used list for which emitUsedDirectiveFor
505 /// is true, as being used with this directive.
506 void AsmPrinter::EmitLLVMUsedList(Constant *List) {
507 const char *Directive = TAI->getUsedDirective();
509 // Should be an array of 'i8*'.
510 ConstantArray *InitList = dyn_cast<ConstantArray>(List);
511 if (InitList == 0) return;
513 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i) {
514 const GlobalValue *GV =
515 dyn_cast<GlobalValue>(InitList->getOperand(i)->stripPointerCasts());
516 if (GV && TAI->emitUsedDirectiveFor(GV, Mang)) {
518 EmitConstantValueOnly(InitList->getOperand(i));
524 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
525 /// function pointers, ignoring the init priority.
526 void AsmPrinter::EmitXXStructorList(Constant *List) {
527 // Should be an array of '{ int, void ()* }' structs. The first value is the
528 // init priority, which we ignore.
529 if (!isa<ConstantArray>(List)) return;
530 ConstantArray *InitList = cast<ConstantArray>(List);
531 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
532 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
533 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
535 if (CS->getOperand(1)->isNullValue())
536 return; // Found a null terminator, exit printing.
537 // Emit the function pointer.
538 EmitGlobalConstant(CS->getOperand(1));
542 /// getGlobalLinkName - Returns the asm/link name of of the specified
543 /// global variable. Should be overridden by each target asm printer to
544 /// generate the appropriate value.
545 const std::string &AsmPrinter::getGlobalLinkName(const GlobalVariable *GV,
546 std::string &LinkName) const {
547 if (isa<Function>(GV)) {
548 LinkName += TAI->getFunctionAddrPrefix();
549 LinkName += Mang->getMangledName(GV);
550 LinkName += TAI->getFunctionAddrSuffix();
552 LinkName += TAI->getGlobalVarAddrPrefix();
553 LinkName += Mang->getMangledName(GV);
554 LinkName += TAI->getGlobalVarAddrSuffix();
560 /// EmitExternalGlobal - Emit the external reference to a global variable.
561 /// Should be overridden if an indirect reference should be used.
562 void AsmPrinter::EmitExternalGlobal(const GlobalVariable *GV) {
564 O << getGlobalLinkName(GV, GLN);
569 //===----------------------------------------------------------------------===//
570 /// LEB 128 number encoding.
572 /// PrintULEB128 - Print a series of hexidecimal values (separated by commas)
573 /// representing an unsigned leb128 value.
574 void AsmPrinter::PrintULEB128(unsigned Value) const {
577 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
579 if (Value) Byte |= 0x80;
580 O << "0x" << utohex_buffer(Byte, Buffer+20);
581 if (Value) O << ", ";
585 /// PrintSLEB128 - Print a series of hexidecimal values (separated by commas)
586 /// representing a signed leb128 value.
587 void AsmPrinter::PrintSLEB128(int Value) const {
588 int Sign = Value >> (8 * sizeof(Value) - 1);
593 unsigned char Byte = static_cast<unsigned char>(Value & 0x7f);
595 IsMore = Value != Sign || ((Byte ^ Sign) & 0x40) != 0;
596 if (IsMore) Byte |= 0x80;
597 O << "0x" << utohex_buffer(Byte, Buffer+20);
598 if (IsMore) O << ", ";
602 //===--------------------------------------------------------------------===//
603 // Emission and print routines
606 /// PrintHex - Print a value as a hexidecimal value.
608 void AsmPrinter::PrintHex(int Value) const {
610 O << "0x" << utohex_buffer(static_cast<unsigned>(Value), Buffer+20);
613 /// EOL - Print a newline character to asm stream. If a comment is present
614 /// then it will be printed first. Comments should not contain '\n'.
615 void AsmPrinter::EOL() const {
619 void AsmPrinter::EOL(const std::string &Comment) const {
620 if (VerboseAsm && !Comment.empty()) {
622 << TAI->getCommentString()
629 void AsmPrinter::EOL(const char* Comment) const {
630 if (VerboseAsm && *Comment) {
632 << TAI->getCommentString()
639 /// EmitULEB128Bytes - Emit an assembler byte data directive to compose an
640 /// unsigned leb128 value.
641 void AsmPrinter::EmitULEB128Bytes(unsigned Value) const {
642 if (TAI->hasLEB128()) {
646 O << TAI->getData8bitsDirective();
651 /// EmitSLEB128Bytes - print an assembler byte data directive to compose a
652 /// signed leb128 value.
653 void AsmPrinter::EmitSLEB128Bytes(int Value) const {
654 if (TAI->hasLEB128()) {
658 O << TAI->getData8bitsDirective();
663 /// EmitInt8 - Emit a byte directive and value.
665 void AsmPrinter::EmitInt8(int Value) const {
666 O << TAI->getData8bitsDirective();
667 PrintHex(Value & 0xFF);
670 /// EmitInt16 - Emit a short directive and value.
672 void AsmPrinter::EmitInt16(int Value) const {
673 O << TAI->getData16bitsDirective();
674 PrintHex(Value & 0xFFFF);
677 /// EmitInt32 - Emit a long directive and value.
679 void AsmPrinter::EmitInt32(int Value) const {
680 O << TAI->getData32bitsDirective();
684 /// EmitInt64 - Emit a long long directive and value.
686 void AsmPrinter::EmitInt64(uint64_t Value) const {
687 if (TAI->getData64bitsDirective()) {
688 O << TAI->getData64bitsDirective();
691 if (TM.getTargetData()->isBigEndian()) {
692 EmitInt32(unsigned(Value >> 32)); O << '\n';
693 EmitInt32(unsigned(Value));
695 EmitInt32(unsigned(Value)); O << '\n';
696 EmitInt32(unsigned(Value >> 32));
701 /// toOctal - Convert the low order bits of X into an octal digit.
703 static inline char toOctal(int X) {
707 /// printStringChar - Print a char, escaped if necessary.
709 static void printStringChar(formatted_raw_ostream &O, unsigned char C) {
712 } else if (C == '\\') {
714 } else if (isprint((unsigned char)C)) {
718 case '\b': O << "\\b"; break;
719 case '\f': O << "\\f"; break;
720 case '\n': O << "\\n"; break;
721 case '\r': O << "\\r"; break;
722 case '\t': O << "\\t"; break;
725 O << toOctal(C >> 6);
726 O << toOctal(C >> 3);
727 O << toOctal(C >> 0);
733 /// EmitString - Emit a string with quotes and a null terminator.
734 /// Special characters are emitted properly.
735 /// \literal (Eg. '\t') \endliteral
736 void AsmPrinter::EmitString(const std::string &String) const {
737 EmitString(String.c_str(), String.size());
740 void AsmPrinter::EmitString(const char *String, unsigned Size) const {
741 const char* AscizDirective = TAI->getAscizDirective();
745 O << TAI->getAsciiDirective();
747 for (unsigned i = 0; i < Size; ++i)
748 printStringChar(O, String[i]);
756 /// EmitFile - Emit a .file directive.
757 void AsmPrinter::EmitFile(unsigned Number, const std::string &Name) const {
758 O << "\t.file\t" << Number << " \"";
759 for (unsigned i = 0, N = Name.size(); i < N; ++i)
760 printStringChar(O, Name[i]);
765 //===----------------------------------------------------------------------===//
767 // EmitAlignment - Emit an alignment directive to the specified power of
768 // two boundary. For example, if you pass in 3 here, you will get an 8
769 // byte alignment. If a global value is specified, and if that global has
770 // an explicit alignment requested, it will unconditionally override the
771 // alignment request. However, if ForcedAlignBits is specified, this value
772 // has final say: the ultimate alignment will be the max of ForcedAlignBits
773 // and the alignment computed with NumBits and the global.
777 // if (GV && GV->hasalignment) Align = GV->getalignment();
778 // Align = std::max(Align, ForcedAlignBits);
780 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV,
781 unsigned ForcedAlignBits,
782 bool UseFillExpr) const {
783 if (GV && GV->getAlignment())
784 NumBits = Log2_32(GV->getAlignment());
785 NumBits = std::max(NumBits, ForcedAlignBits);
787 if (NumBits == 0) return; // No need to emit alignment.
788 if (TAI->getAlignmentIsInBytes()) NumBits = 1 << NumBits;
789 O << TAI->getAlignDirective() << NumBits;
791 unsigned FillValue = TAI->getTextAlignFillValue();
792 UseFillExpr &= IsInTextSection && FillValue;
801 /// EmitZeros - Emit a block of zeros.
803 void AsmPrinter::EmitZeros(uint64_t NumZeros, unsigned AddrSpace) const {
805 if (TAI->getZeroDirective()) {
806 O << TAI->getZeroDirective() << NumZeros;
807 if (TAI->getZeroDirectiveSuffix())
808 O << TAI->getZeroDirectiveSuffix();
811 for (; NumZeros; --NumZeros)
812 O << TAI->getData8bitsDirective(AddrSpace) << "0\n";
817 // Print out the specified constant, without a storage class. Only the
818 // constants valid in constant expressions can occur here.
819 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
820 if (CV->isNullValue() || isa<UndefValue>(CV))
822 else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
823 O << CI->getZExtValue();
824 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
825 // This is a constant address for a global variable or function. Use the
826 // name of the variable or function as the address value, possibly
827 // decorating it with GlobalVarAddrPrefix/Suffix or
828 // FunctionAddrPrefix/Suffix (these all default to "" )
829 if (isa<Function>(GV)) {
830 O << TAI->getFunctionAddrPrefix()
831 << Mang->getMangledName(GV)
832 << TAI->getFunctionAddrSuffix();
834 O << TAI->getGlobalVarAddrPrefix()
835 << Mang->getMangledName(GV)
836 << TAI->getGlobalVarAddrSuffix();
838 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
839 const TargetData *TD = TM.getTargetData();
840 unsigned Opcode = CE->getOpcode();
842 case Instruction::GetElementPtr: {
843 // generate a symbolic expression for the byte address
844 const Constant *ptrVal = CE->getOperand(0);
845 SmallVector<Value*, 8> idxVec(CE->op_begin()+1, CE->op_end());
846 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), &idxVec[0],
848 // Truncate/sext the offset to the pointer size.
849 if (TD->getPointerSizeInBits() != 64) {
850 int SExtAmount = 64-TD->getPointerSizeInBits();
851 Offset = (Offset << SExtAmount) >> SExtAmount;
856 EmitConstantValueOnly(ptrVal);
858 O << ") + " << Offset;
860 O << ") - " << -Offset;
862 EmitConstantValueOnly(ptrVal);
866 case Instruction::Trunc:
867 case Instruction::ZExt:
868 case Instruction::SExt:
869 case Instruction::FPTrunc:
870 case Instruction::FPExt:
871 case Instruction::UIToFP:
872 case Instruction::SIToFP:
873 case Instruction::FPToUI:
874 case Instruction::FPToSI:
875 llvm_unreachable("FIXME: Don't yet support this kind of constant cast expr");
877 case Instruction::BitCast:
878 return EmitConstantValueOnly(CE->getOperand(0));
880 case Instruction::IntToPtr: {
881 // Handle casts to pointers by changing them into casts to the appropriate
882 // integer type. This promotes constant folding and simplifies this code.
883 Constant *Op = CE->getOperand(0);
884 Op = ConstantExpr::getIntegerCast(Op, TD->getIntPtrType(), false/*ZExt*/);
885 return EmitConstantValueOnly(Op);
889 case Instruction::PtrToInt: {
890 // Support only foldable casts to/from pointers that can be eliminated by
891 // changing the pointer to the appropriately sized integer type.
892 Constant *Op = CE->getOperand(0);
893 const Type *Ty = CE->getType();
895 // We can emit the pointer value into this slot if the slot is an
896 // integer slot greater or equal to the size of the pointer.
897 if (TD->getTypeAllocSize(Ty) >= TD->getTypeAllocSize(Op->getType()))
898 return EmitConstantValueOnly(Op);
901 EmitConstantValueOnly(Op);
902 APInt ptrMask = APInt::getAllOnesValue(TD->getTypeAllocSizeInBits(Ty));
905 ptrMask.toStringUnsigned(S);
906 O << ") & " << S.c_str() << ')';
909 case Instruction::Add:
910 case Instruction::Sub:
911 case Instruction::And:
912 case Instruction::Or:
913 case Instruction::Xor:
915 EmitConstantValueOnly(CE->getOperand(0));
918 case Instruction::Add:
921 case Instruction::Sub:
924 case Instruction::And:
927 case Instruction::Or:
930 case Instruction::Xor:
937 EmitConstantValueOnly(CE->getOperand(1));
941 llvm_unreachable("Unsupported operator!");
944 llvm_unreachable("Unknown constant value!");
948 /// printAsCString - Print the specified array as a C compatible string, only if
949 /// the predicate isString is true.
951 static void printAsCString(formatted_raw_ostream &O, const ConstantArray *CVA,
953 assert(CVA->isString() && "Array is not string compatible!");
956 for (unsigned i = 0; i != LastElt; ++i) {
958 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getZExtValue();
959 printStringChar(O, C);
964 /// EmitString - Emit a zero-byte-terminated string constant.
966 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
967 unsigned NumElts = CVA->getNumOperands();
968 if (TAI->getAscizDirective() && NumElts &&
969 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getZExtValue() == 0) {
970 O << TAI->getAscizDirective();
971 printAsCString(O, CVA, NumElts-1);
973 O << TAI->getAsciiDirective();
974 printAsCString(O, CVA, NumElts);
979 void AsmPrinter::EmitGlobalConstantArray(const ConstantArray *CVA,
980 unsigned AddrSpace) {
981 if (CVA->isString()) {
983 } else { // Not a string. Print the values in successive locations
984 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
985 EmitGlobalConstant(CVA->getOperand(i), AddrSpace);
989 void AsmPrinter::EmitGlobalConstantVector(const ConstantVector *CP) {
990 const VectorType *PTy = CP->getType();
992 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
993 EmitGlobalConstant(CP->getOperand(I));
996 void AsmPrinter::EmitGlobalConstantStruct(const ConstantStruct *CVS,
997 unsigned AddrSpace) {
998 // Print the fields in successive locations. Pad to align if needed!
999 const TargetData *TD = TM.getTargetData();
1000 unsigned Size = TD->getTypeAllocSize(CVS->getType());
1001 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
1002 uint64_t sizeSoFar = 0;
1003 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
1004 const Constant* field = CVS->getOperand(i);
1006 // Check if padding is needed and insert one or more 0s.
1007 uint64_t fieldSize = TD->getTypeAllocSize(field->getType());
1008 uint64_t padSize = ((i == e-1 ? Size : cvsLayout->getElementOffset(i+1))
1009 - cvsLayout->getElementOffset(i)) - fieldSize;
1010 sizeSoFar += fieldSize + padSize;
1012 // Now print the actual field value.
1013 EmitGlobalConstant(field, AddrSpace);
1015 // Insert padding - this may include padding to increase the size of the
1016 // current field up to the ABI size (if the struct is not packed) as well
1017 // as padding to ensure that the next field starts at the right offset.
1018 EmitZeros(padSize, AddrSpace);
1020 assert(sizeSoFar == cvsLayout->getSizeInBytes() &&
1021 "Layout of constant struct may be incorrect!");
1024 void AsmPrinter::EmitGlobalConstantFP(const ConstantFP *CFP,
1025 unsigned AddrSpace) {
1026 // FP Constants are printed as integer constants to avoid losing
1028 const TargetData *TD = TM.getTargetData();
1029 if (CFP->getType() == Type::DoubleTy) {
1030 double Val = CFP->getValueAPF().convertToDouble(); // for comment only
1031 uint64_t i = CFP->getValueAPF().bitcastToAPInt().getZExtValue();
1032 if (TAI->getData64bitsDirective(AddrSpace)) {
1033 O << TAI->getData64bitsDirective(AddrSpace) << i;
1035 O << '\t' << TAI->getCommentString() << " double value: " << Val;
1037 } else if (TD->isBigEndian()) {
1038 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
1040 O << '\t' << TAI->getCommentString()
1041 << " double most significant word " << Val;
1043 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
1045 O << '\t' << TAI->getCommentString()
1046 << " double least significant word " << Val;
1049 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i);
1051 O << '\t' << TAI->getCommentString()
1052 << " double least significant word " << Val;
1054 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(i >> 32);
1056 O << '\t' << TAI->getCommentString()
1057 << " double most significant word " << Val;
1061 } else if (CFP->getType() == Type::FloatTy) {
1062 float Val = CFP->getValueAPF().convertToFloat(); // for comment only
1063 O << TAI->getData32bitsDirective(AddrSpace)
1064 << CFP->getValueAPF().bitcastToAPInt().getZExtValue();
1066 O << '\t' << TAI->getCommentString() << " float " << Val;
1069 } else if (CFP->getType() == Type::X86_FP80Ty) {
1070 // all long double variants are printed as hex
1071 // api needed to prevent premature destruction
1072 APInt api = CFP->getValueAPF().bitcastToAPInt();
1073 const uint64_t *p = api.getRawData();
1074 // Convert to double so we can print the approximate val as a comment.
1075 APFloat DoubleVal = CFP->getValueAPF();
1077 DoubleVal.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven,
1079 if (TD->isBigEndian()) {
1080 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
1082 O << '\t' << TAI->getCommentString()
1083 << " long double most significant halfword of ~"
1084 << DoubleVal.convertToDouble();
1086 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
1088 O << '\t' << TAI->getCommentString() << " long double next halfword";
1090 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
1092 O << '\t' << TAI->getCommentString() << " long double next halfword";
1094 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
1096 O << '\t' << TAI->getCommentString() << " long double next halfword";
1098 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
1100 O << '\t' << TAI->getCommentString()
1101 << " long double least significant halfword";
1104 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0]);
1106 O << '\t' << TAI->getCommentString()
1107 << " long double least significant halfword of ~"
1108 << DoubleVal.convertToDouble();
1110 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 16);
1112 O << '\t' << TAI->getCommentString()
1113 << " long double next halfword";
1115 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 32);
1117 O << '\t' << TAI->getCommentString()
1118 << " long double next halfword";
1120 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[0] >> 48);
1122 O << '\t' << TAI->getCommentString()
1123 << " long double next halfword";
1125 O << TAI->getData16bitsDirective(AddrSpace) << uint16_t(p[1]);
1127 O << '\t' << TAI->getCommentString()
1128 << " long double most significant halfword";
1131 EmitZeros(TD->getTypeAllocSize(Type::X86_FP80Ty) -
1132 TD->getTypeStoreSize(Type::X86_FP80Ty), AddrSpace);
1134 } else if (CFP->getType() == Type::PPC_FP128Ty) {
1135 // all long double variants are printed as hex
1136 // api needed to prevent premature destruction
1137 APInt api = CFP->getValueAPF().bitcastToAPInt();
1138 const uint64_t *p = api.getRawData();
1139 if (TD->isBigEndian()) {
1140 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
1142 O << '\t' << TAI->getCommentString()
1143 << " long double most significant word";
1145 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
1147 O << '\t' << TAI->getCommentString()
1148 << " long double next word";
1150 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
1152 O << '\t' << TAI->getCommentString()
1153 << " long double next word";
1155 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
1157 O << '\t' << TAI->getCommentString()
1158 << " long double least significant word";
1161 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1]);
1163 O << '\t' << TAI->getCommentString()
1164 << " long double least significant word";
1166 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[1] >> 32);
1168 O << '\t' << TAI->getCommentString()
1169 << " long double next word";
1171 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0]);
1173 O << '\t' << TAI->getCommentString()
1174 << " long double next word";
1176 O << TAI->getData32bitsDirective(AddrSpace) << uint32_t(p[0] >> 32);
1178 O << '\t' << TAI->getCommentString()
1179 << " long double most significant word";
1183 } else llvm_unreachable("Floating point constant type not handled");
1186 void AsmPrinter::EmitGlobalConstantLargeInt(const ConstantInt *CI,
1187 unsigned AddrSpace) {
1188 const TargetData *TD = TM.getTargetData();
1189 unsigned BitWidth = CI->getBitWidth();
1190 assert(isPowerOf2_32(BitWidth) &&
1191 "Non-power-of-2-sized integers not handled!");
1193 // We don't expect assemblers to support integer data directives
1194 // for more than 64 bits, so we emit the data in at most 64-bit
1195 // quantities at a time.
1196 const uint64_t *RawData = CI->getValue().getRawData();
1197 for (unsigned i = 0, e = BitWidth / 64; i != e; ++i) {
1199 if (TD->isBigEndian())
1200 Val = RawData[e - i - 1];
1204 if (TAI->getData64bitsDirective(AddrSpace))
1205 O << TAI->getData64bitsDirective(AddrSpace) << Val << '\n';
1206 else if (TD->isBigEndian()) {
1207 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
1209 O << '\t' << TAI->getCommentString()
1210 << " Double-word most significant word " << Val;
1212 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
1214 O << '\t' << TAI->getCommentString()
1215 << " Double-word least significant word " << Val;
1218 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val);
1220 O << '\t' << TAI->getCommentString()
1221 << " Double-word least significant word " << Val;
1223 O << TAI->getData32bitsDirective(AddrSpace) << unsigned(Val >> 32);
1225 O << '\t' << TAI->getCommentString()
1226 << " Double-word most significant word " << Val;
1232 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
1233 void AsmPrinter::EmitGlobalConstant(const Constant *CV, unsigned AddrSpace) {
1234 const TargetData *TD = TM.getTargetData();
1235 const Type *type = CV->getType();
1236 unsigned Size = TD->getTypeAllocSize(type);
1238 if (CV->isNullValue() || isa<UndefValue>(CV)) {
1239 EmitZeros(Size, AddrSpace);
1241 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
1242 EmitGlobalConstantArray(CVA , AddrSpace);
1244 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
1245 EmitGlobalConstantStruct(CVS, AddrSpace);
1247 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
1248 EmitGlobalConstantFP(CFP, AddrSpace);
1250 } else if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1251 // Small integers are handled below; large integers are handled here.
1253 EmitGlobalConstantLargeInt(CI, AddrSpace);
1256 } else if (const ConstantVector *CP = dyn_cast<ConstantVector>(CV)) {
1257 EmitGlobalConstantVector(CP);
1261 printDataDirective(type, AddrSpace);
1262 EmitConstantValueOnly(CV);
1264 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
1266 CI->getValue().toStringUnsigned(S, 16);
1267 O << "\t\t\t" << TAI->getCommentString() << " 0x" << S.c_str();
1273 void AsmPrinter::EmitMachineConstantPoolValue(MachineConstantPoolValue *MCPV) {
1274 // Target doesn't support this yet!
1275 llvm_unreachable("Target does not support EmitMachineConstantPoolValue");
1278 /// PrintSpecial - Print information related to the specified machine instr
1279 /// that is independent of the operand, and may be independent of the instr
1280 /// itself. This can be useful for portably encoding the comment character
1281 /// or other bits of target-specific knowledge into the asmstrings. The
1282 /// syntax used is ${:comment}. Targets can override this to add support
1283 /// for their own strange codes.
1284 void AsmPrinter::PrintSpecial(const MachineInstr *MI, const char *Code) const {
1285 if (!strcmp(Code, "private")) {
1286 O << TAI->getPrivateGlobalPrefix();
1287 } else if (!strcmp(Code, "comment")) {
1289 O << TAI->getCommentString();
1290 } else if (!strcmp(Code, "uid")) {
1291 // Comparing the address of MI isn't sufficient, because machineinstrs may
1292 // be allocated to the same address across functions.
1293 const Function *ThisF = MI->getParent()->getParent()->getFunction();
1295 // If this is a new LastFn instruction, bump the counter.
1296 if (LastMI != MI || LastFn != ThisF) {
1304 raw_string_ostream Msg(msg);
1305 Msg << "Unknown special formatter '" << Code
1306 << "' for machine instr: " << *MI;
1307 llvm_report_error(Msg.str());
1311 /// processDebugLoc - Processes the debug information of each machine
1312 /// instruction's DebugLoc.
1313 void AsmPrinter::processDebugLoc(DebugLoc DL) {
1314 if (TAI->doesSupportDebugInformation() && DW->ShouldEmitDwarfDebug()) {
1315 if (!DL.isUnknown()) {
1316 DebugLocTuple CurDLT = MF->getDebugLocTuple(DL);
1318 if (CurDLT.CompileUnit != 0 && PrevDLT != CurDLT)
1319 printLabel(DW->RecordSourceLine(CurDLT.Line, CurDLT.Col,
1320 DICompileUnit(CurDLT.CompileUnit)));
1327 /// printInlineAsm - This method formats and prints the specified machine
1328 /// instruction that is an inline asm.
1329 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
1330 unsigned NumOperands = MI->getNumOperands();
1332 // Count the number of register definitions.
1333 unsigned NumDefs = 0;
1334 for (; MI->getOperand(NumDefs).isReg() && MI->getOperand(NumDefs).isDef();
1336 assert(NumDefs != NumOperands-1 && "No asm string?");
1338 assert(MI->getOperand(NumDefs).isSymbol() && "No asm string?");
1340 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
1341 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
1343 // If this asmstr is empty, just print the #APP/#NOAPP markers.
1344 // These are useful to see where empty asm's wound up.
1345 if (AsmStr[0] == 0) {
1346 O << TAI->getInlineAsmStart() << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1350 O << TAI->getInlineAsmStart() << "\n\t";
1352 // The variant of the current asmprinter.
1353 int AsmPrinterVariant = TAI->getAssemblerDialect();
1355 int CurVariant = -1; // The number of the {.|.|.} region we are in.
1356 const char *LastEmitted = AsmStr; // One past the last character emitted.
1358 while (*LastEmitted) {
1359 switch (*LastEmitted) {
1361 // Not a special case, emit the string section literally.
1362 const char *LiteralEnd = LastEmitted+1;
1363 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
1364 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
1366 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1367 O.write(LastEmitted, LiteralEnd-LastEmitted);
1368 LastEmitted = LiteralEnd;
1372 ++LastEmitted; // Consume newline character.
1373 O << '\n'; // Indent code with newline.
1376 ++LastEmitted; // Consume '$' character.
1380 switch (*LastEmitted) {
1381 default: Done = false; break;
1382 case '$': // $$ -> $
1383 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
1385 ++LastEmitted; // Consume second '$' character.
1387 case '(': // $( -> same as GCC's { character.
1388 ++LastEmitted; // Consume '(' character.
1389 if (CurVariant != -1) {
1390 llvm_report_error("Nested variants found in inline asm string: '"
1391 + std::string(AsmStr) + "'");
1393 CurVariant = 0; // We're in the first variant now.
1396 ++LastEmitted; // consume '|' character.
1397 if (CurVariant == -1)
1398 O << '|'; // this is gcc's behavior for | outside a variant
1400 ++CurVariant; // We're in the next variant.
1402 case ')': // $) -> same as GCC's } char.
1403 ++LastEmitted; // consume ')' character.
1404 if (CurVariant == -1)
1405 O << '}'; // this is gcc's behavior for } outside a variant
1412 bool HasCurlyBraces = false;
1413 if (*LastEmitted == '{') { // ${variable}
1414 ++LastEmitted; // Consume '{' character.
1415 HasCurlyBraces = true;
1418 // If we have ${:foo}, then this is not a real operand reference, it is a
1419 // "magic" string reference, just like in .td files. Arrange to call
1421 if (HasCurlyBraces && *LastEmitted == ':') {
1423 const char *StrStart = LastEmitted;
1424 const char *StrEnd = strchr(StrStart, '}');
1426 llvm_report_error("Unterminated ${:foo} operand in inline asm string: '"
1427 + std::string(AsmStr) + "'");
1430 std::string Val(StrStart, StrEnd);
1431 PrintSpecial(MI, Val.c_str());
1432 LastEmitted = StrEnd+1;
1436 const char *IDStart = LastEmitted;
1439 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
1440 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
1441 llvm_report_error("Bad $ operand number in inline asm string: '"
1442 + std::string(AsmStr) + "'");
1444 LastEmitted = IDEnd;
1446 char Modifier[2] = { 0, 0 };
1448 if (HasCurlyBraces) {
1449 // If we have curly braces, check for a modifier character. This
1450 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
1451 if (*LastEmitted == ':') {
1452 ++LastEmitted; // Consume ':' character.
1453 if (*LastEmitted == 0) {
1454 llvm_report_error("Bad ${:} expression in inline asm string: '"
1455 + std::string(AsmStr) + "'");
1458 Modifier[0] = *LastEmitted;
1459 ++LastEmitted; // Consume modifier character.
1462 if (*LastEmitted != '}') {
1463 llvm_report_error("Bad ${} expression in inline asm string: '"
1464 + std::string(AsmStr) + "'");
1466 ++LastEmitted; // Consume '}' character.
1469 if ((unsigned)Val >= NumOperands-1) {
1470 llvm_report_error("Invalid $ operand number in inline asm string: '"
1471 + std::string(AsmStr) + "'");
1474 // Okay, we finally have a value number. Ask the target to print this
1476 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
1481 // Scan to find the machine operand number for the operand.
1482 for (; Val; --Val) {
1483 if (OpNo >= MI->getNumOperands()) break;
1484 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1485 OpNo += InlineAsm::getNumOperandRegisters(OpFlags) + 1;
1488 if (OpNo >= MI->getNumOperands()) {
1491 unsigned OpFlags = MI->getOperand(OpNo).getImm();
1492 ++OpNo; // Skip over the ID number.
1494 if (Modifier[0]=='l') // labels are target independent
1495 printBasicBlockLabel(MI->getOperand(OpNo).getMBB(),
1496 false, false, false);
1498 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
1499 if ((OpFlags & 7) == 4) {
1500 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
1501 Modifier[0] ? Modifier : 0);
1503 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
1504 Modifier[0] ? Modifier : 0);
1510 raw_string_ostream Msg(msg);
1511 Msg << "Invalid operand found in inline asm: '"
1514 llvm_report_error(Msg.str());
1521 O << "\n\t" << TAI->getInlineAsmEnd() << '\n';
1524 /// printImplicitDef - This method prints the specified machine instruction
1525 /// that is an implicit def.
1526 void AsmPrinter::printImplicitDef(const MachineInstr *MI) const {
1528 O << '\t' << TAI->getCommentString() << " implicit-def: "
1529 << TRI->getAsmName(MI->getOperand(0).getReg()) << '\n';
1532 /// printLabel - This method prints a local label used by debug and
1533 /// exception handling tables.
1534 void AsmPrinter::printLabel(const MachineInstr *MI) const {
1535 printLabel(MI->getOperand(0).getImm());
1538 void AsmPrinter::printLabel(unsigned Id) const {
1539 O << TAI->getPrivateGlobalPrefix() << "label" << Id << ":\n";
1542 /// printDeclare - This method prints a local variable declaration used by
1544 /// FIXME: It doesn't really print anything rather it inserts a DebugVariable
1545 /// entry into dwarf table.
1546 void AsmPrinter::printDeclare(const MachineInstr *MI) const {
1547 unsigned FI = MI->getOperand(0).getIndex();
1548 GlobalValue *GV = MI->getOperand(1).getGlobal();
1549 DW->RecordVariable(cast<GlobalVariable>(GV), FI, MI);
1552 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
1553 /// instruction, using the specified assembler variant. Targets should
1554 /// overried this to format as appropriate.
1555 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
1556 unsigned AsmVariant, const char *ExtraCode) {
1557 // Target doesn't support this yet!
1561 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
1562 unsigned AsmVariant,
1563 const char *ExtraCode) {
1564 // Target doesn't support this yet!
1568 /// printBasicBlockLabel - This method prints the label for the specified
1569 /// MachineBasicBlock
1570 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
1573 bool printComment) const {
1575 unsigned Align = MBB->getAlignment();
1577 EmitAlignment(Log2_32(Align));
1580 O << TAI->getPrivateGlobalPrefix() << "BB" << getFunctionNumber() << '_'
1581 << MBB->getNumber();
1584 if (printComment && MBB->getBasicBlock())
1585 O << '\t' << TAI->getCommentString() << ' '
1586 << MBB->getBasicBlock()->getNameStart();
1589 /// printPICJumpTableSetLabel - This method prints a set label for the
1590 /// specified MachineBasicBlock for a jumptable entry.
1591 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid,
1592 const MachineBasicBlock *MBB) const {
1593 if (!TAI->getSetDirective())
1596 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1597 << getFunctionNumber() << '_' << uid << "_set_" << MBB->getNumber() << ',';
1598 printBasicBlockLabel(MBB, false, false, false);
1599 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1600 << '_' << uid << '\n';
1603 void AsmPrinter::printPICJumpTableSetLabel(unsigned uid, unsigned uid2,
1604 const MachineBasicBlock *MBB) const {
1605 if (!TAI->getSetDirective())
1608 O << TAI->getSetDirective() << ' ' << TAI->getPrivateGlobalPrefix()
1609 << getFunctionNumber() << '_' << uid << '_' << uid2
1610 << "_set_" << MBB->getNumber() << ',';
1611 printBasicBlockLabel(MBB, false, false, false);
1612 O << '-' << TAI->getPrivateGlobalPrefix() << "JTI" << getFunctionNumber()
1613 << '_' << uid << '_' << uid2 << '\n';
1616 /// printDataDirective - This method prints the asm directive for the
1618 void AsmPrinter::printDataDirective(const Type *type, unsigned AddrSpace) {
1619 const TargetData *TD = TM.getTargetData();
1620 switch (type->getTypeID()) {
1621 case Type::FloatTyID: case Type::DoubleTyID:
1622 case Type::X86_FP80TyID: case Type::FP128TyID: case Type::PPC_FP128TyID:
1623 assert(0 && "Should have already output floating point constant.");
1625 assert(0 && "Can't handle printing this type of thing");
1626 case Type::IntegerTyID: {
1627 unsigned BitWidth = cast<IntegerType>(type)->getBitWidth();
1629 O << TAI->getData8bitsDirective(AddrSpace);
1630 else if (BitWidth <= 16)
1631 O << TAI->getData16bitsDirective(AddrSpace);
1632 else if (BitWidth <= 32)
1633 O << TAI->getData32bitsDirective(AddrSpace);
1634 else if (BitWidth <= 64) {
1635 assert(TAI->getData64bitsDirective(AddrSpace) &&
1636 "Target cannot handle 64-bit constant exprs!");
1637 O << TAI->getData64bitsDirective(AddrSpace);
1639 llvm_unreachable("Target cannot handle given data directive width!");
1643 case Type::PointerTyID:
1644 if (TD->getPointerSize() == 8) {
1645 assert(TAI->getData64bitsDirective(AddrSpace) &&
1646 "Target cannot handle 64-bit pointer exprs!");
1647 O << TAI->getData64bitsDirective(AddrSpace);
1648 } else if (TD->getPointerSize() == 2) {
1649 O << TAI->getData16bitsDirective(AddrSpace);
1650 } else if (TD->getPointerSize() == 1) {
1651 O << TAI->getData8bitsDirective(AddrSpace);
1653 O << TAI->getData32bitsDirective(AddrSpace);
1659 void AsmPrinter::printVisibility(const std::string& Name,
1660 unsigned Visibility) const {
1661 if (Visibility == GlobalValue::HiddenVisibility) {
1662 if (const char *Directive = TAI->getHiddenDirective())
1663 O << Directive << Name << '\n';
1664 } else if (Visibility == GlobalValue::ProtectedVisibility) {
1665 if (const char *Directive = TAI->getProtectedDirective())
1666 O << Directive << Name << '\n';
1670 void AsmPrinter::printOffset(int64_t Offset) const {
1673 else if (Offset < 0)
1677 GCMetadataPrinter *AsmPrinter::GetOrCreateGCPrinter(GCStrategy *S) {
1678 if (!S->usesMetadata())
1681 gcp_iterator GCPI = GCMetadataPrinters.find(S);
1682 if (GCPI != GCMetadataPrinters.end())
1683 return GCPI->second;
1685 const char *Name = S->getName().c_str();
1687 for (GCMetadataPrinterRegistry::iterator
1688 I = GCMetadataPrinterRegistry::begin(),
1689 E = GCMetadataPrinterRegistry::end(); I != E; ++I)
1690 if (strcmp(Name, I->getName()) == 0) {
1691 GCMetadataPrinter *GMP = I->instantiate();
1693 GCMetadataPrinters.insert(std::make_pair(S, GMP));
1697 cerr << "no GCMetadataPrinter registered for GC: " << Name << "\n";
1698 llvm_unreachable(0);
1701 /// EmitComments - Pretty-print comments for instructions
1702 void AsmPrinter::EmitComments(const MachineInstr &MI) const
1704 if (!MI.getDebugLoc().isUnknown()) {
1705 DebugLocTuple DLT = MF->getDebugLocTuple(MI.getDebugLoc());
1707 // Print source line info
1708 O.PadToColumn(TAI->getCommentColumn(), 1);
1709 O << TAI->getCommentString() << " SrcLine " << DLT.Line << ":" << DLT.Col;
1713 /// EmitComments - Pretty-print comments for instructions
1714 void AsmPrinter::EmitComments(const MCInst &MI) const
1716 if (!MI.getDebugLoc().isUnknown()) {
1717 DebugLocTuple DLT = MF->getDebugLocTuple(MI.getDebugLoc());
1719 // Print source line info
1720 O.PadToColumn(TAI->getCommentColumn(), 1);
1721 O << TAI->getCommentString() << " SrcLine " << DLT.Line << ":" << DLT.Col;