1 //===-- AsmPrinter.cpp - Common AsmPrinter code ---------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source 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/MachineConstantPool.h"
20 #include "llvm/CodeGen/MachineJumpTableInfo.h"
21 #include "llvm/Support/Mangler.h"
22 #include "llvm/Support/MathExtras.h"
23 #include "llvm/Target/TargetData.h"
24 #include "llvm/Target/TargetMachine.h"
29 AsmPrinter::AsmPrinter(std::ostream &o, TargetMachine &tm)
30 : FunctionNumber(0), O(o), TM(tm),
33 PrivateGlobalPrefix("."),
34 GlobalVarAddrPrefix(""),
35 GlobalVarAddrSuffix(""),
36 FunctionAddrPrefix(""),
37 FunctionAddrSuffix(""),
38 InlineAsmStart("#APP"),
39 InlineAsmEnd("#NO_APP"),
40 ZeroDirective("\t.zero\t"),
41 ZeroDirectiveSuffix(0),
42 AsciiDirective("\t.ascii\t"),
43 AscizDirective("\t.asciz\t"),
44 Data8bitsDirective("\t.byte\t"),
45 Data16bitsDirective("\t.short\t"),
46 Data32bitsDirective("\t.long\t"),
47 Data64bitsDirective("\t.quad\t"),
48 AlignDirective("\t.align\t"),
49 AlignmentIsInBytes(true),
50 SwitchToSectionDirective("\t.section\t"),
51 TextSectionStartSuffix(""),
52 DataSectionStartSuffix(""),
53 SectionEndDirectiveSuffix(0),
54 ConstantPoolSection("\t.section .rodata\n"),
55 JumpTableSection("\t.section .rodata\n"),
56 StaticCtorsSection("\t.section .ctors,\"aw\",@progbits"),
57 StaticDtorsSection("\t.section .dtors,\"aw\",@progbits"),
58 FourByteConstantSection(0),
59 EightByteConstantSection(0),
60 SixteenByteConstantSection(0),
62 COMMDirective("\t.comm\t"),
63 COMMDirectiveTakesAlignment(true),
64 HasDotTypeDotSizeDirective(true) {
68 /// SwitchToTextSection - Switch to the specified text section of the executable
69 /// if we are not already in it!
71 void AsmPrinter::SwitchToTextSection(const char *NewSection,
72 const GlobalValue *GV) {
74 if (GV && GV->hasSection())
75 NS = SwitchToSectionDirective + GV->getSection();
79 // If we're already in this section, we're done.
80 if (CurrentSection == NS) return;
82 // Close the current section, if applicable.
83 if (SectionEndDirectiveSuffix && !CurrentSection.empty())
84 O << CurrentSection << SectionEndDirectiveSuffix << "\n";
88 if (!CurrentSection.empty())
89 O << CurrentSection << TextSectionStartSuffix << '\n';
92 /// SwitchToTextSection - Switch to the specified text 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 = SwitchToSectionDirective + 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 (SectionEndDirectiveSuffix && !CurrentSection.empty())
108 O << CurrentSection << SectionEndDirectiveSuffix << "\n";
112 if (!CurrentSection.empty())
113 O << CurrentSection << DataSectionStartSuffix << '\n';
117 bool AsmPrinter::doInitialization(Module &M) {
118 Mang = new Mangler(M, GlobalPrefix);
120 if (!M.getModuleInlineAsm().empty())
121 O << CommentString << " Start of file scope inline assembly\n"
122 << M.getModuleInlineAsm()
123 << "\n" << CommentString << " End of file scope inline assembly\n";
125 SwitchToDataSection("", 0); // Reset back to no section.
127 if (MachineDebugInfo *DebugInfo = getAnalysisToUpdate<MachineDebugInfo>()) {
128 DebugInfo->AnalyzeModule(M);
134 bool AsmPrinter::doFinalization(Module &M) {
135 delete Mang; Mang = 0;
139 void AsmPrinter::SetupMachineFunction(MachineFunction &MF) {
140 // What's my mangled name?
141 CurrentFnName = Mang->getValueName(MF.getFunction());
142 IncrementFunctionNumber();
145 /// EmitConstantPool - Print to the current output stream assembly
146 /// representations of the constants in the constant pool MCP. This is
147 /// used to print out constants which have been "spilled to memory" by
148 /// the code generator.
150 void AsmPrinter::EmitConstantPool(MachineConstantPool *MCP) {
151 const std::vector<MachineConstantPoolEntry> &CP = MCP->getConstants();
152 if (CP.empty()) return;
154 // Some targets require 4-, 8-, and 16- byte constant literals to be placed
155 // in special sections.
156 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > FourByteCPs;
157 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > EightByteCPs;
158 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > SixteenByteCPs;
159 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > OtherCPs;
160 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
161 MachineConstantPoolEntry CPE = CP[i];
162 const Constant *CV = CPE.Val;
163 const Type *Ty = CV->getType();
164 if (FourByteConstantSection &&
165 TM.getTargetData()->getTypeSize(Ty) == 4)
166 FourByteCPs.push_back(std::make_pair(CPE, i));
167 else if (EightByteConstantSection &&
168 TM.getTargetData()->getTypeSize(Ty) == 8)
169 EightByteCPs.push_back(std::make_pair(CPE, i));
170 else if (SixteenByteConstantSection &&
171 TM.getTargetData()->getTypeSize(Ty) == 16)
172 SixteenByteCPs.push_back(std::make_pair(CPE, i));
174 OtherCPs.push_back(std::make_pair(CPE, i));
177 unsigned Alignment = MCP->getConstantPoolAlignment();
178 EmitConstantPool(Alignment, FourByteConstantSection, FourByteCPs);
179 EmitConstantPool(Alignment, EightByteConstantSection, EightByteCPs);
180 EmitConstantPool(Alignment, SixteenByteConstantSection, SixteenByteCPs);
181 EmitConstantPool(Alignment, ConstantPoolSection, OtherCPs);
184 void AsmPrinter::EmitConstantPool(unsigned Alignment, const char *Section,
185 std::vector<std::pair<MachineConstantPoolEntry,unsigned> > &CP) {
186 if (CP.empty()) return;
188 SwitchToDataSection(Section, 0);
189 EmitAlignment(Alignment);
190 for (unsigned i = 0, e = CP.size(); i != e; ++i) {
191 O << PrivateGlobalPrefix << "CPI" << getFunctionNumber() << '_'
192 << CP[i].second << ":\t\t\t\t\t" << CommentString << " ";
193 WriteTypeSymbolic(O, CP[i].first.Val->getType(), 0) << '\n';
194 EmitGlobalConstant(CP[i].first.Val);
197 TM.getTargetData()->getTypeSize(CP[i].first.Val->getType());
198 unsigned ValEnd = CP[i].first.Offset + EntSize;
199 // Emit inter-object padding for alignment.
200 EmitZeros(CP[i+1].first.Offset-ValEnd);
205 /// EmitJumpTableInfo - Print assembly representations of the jump tables used
206 /// by the current function to the current output stream.
208 void AsmPrinter::EmitJumpTableInfo(MachineJumpTableInfo *MJTI) {
209 const std::vector<MachineJumpTableEntry> &JT = MJTI->getJumpTables();
210 if (JT.empty()) return;
211 const TargetData *TD = TM.getTargetData();
213 // FIXME: someday we need to handle PIC jump tables
214 assert((TM.getRelocationModel() == Reloc::Static ||
215 TM.getRelocationModel() == Reloc::DynamicNoPIC) &&
216 "Unhandled relocation model emitting jump table information!");
218 SwitchToDataSection(JumpTableSection, 0);
219 EmitAlignment(Log2_32(TD->getPointerAlignment()));
220 for (unsigned i = 0, e = JT.size(); i != e; ++i) {
221 O << PrivateGlobalPrefix << "JTI" << getFunctionNumber() << '_' << i
223 const std::vector<MachineBasicBlock*> &JTBBs = JT[i].MBBs;
224 for (unsigned ii = 0, ee = JTBBs.size(); ii != ee; ++ii) {
225 O << Data32bitsDirective << ' ';
226 printBasicBlockLabel(JTBBs[ii]);
232 /// EmitSpecialLLVMGlobal - Check to see if the specified global is a
233 /// special global used by LLVM. If so, emit it and return true, otherwise
234 /// do nothing and return false.
235 bool AsmPrinter::EmitSpecialLLVMGlobal(const GlobalVariable *GV) {
236 // Ignore debug and non-emitted data.
237 if (GV->getSection() == "llvm.metadata") return true;
239 if (!GV->hasAppendingLinkage()) return false;
241 assert(GV->hasInitializer() && "Not a special LLVM global!");
243 if (GV->getName() == "llvm.used")
244 return true; // No need to emit this at all.
246 if (GV->getName() == "llvm.global_ctors" && GV->use_empty()) {
247 SwitchToDataSection(StaticCtorsSection, 0);
249 EmitXXStructorList(GV->getInitializer());
253 if (GV->getName() == "llvm.global_dtors" && GV->use_empty()) {
254 SwitchToDataSection(StaticDtorsSection, 0);
256 EmitXXStructorList(GV->getInitializer());
263 /// EmitXXStructorList - Emit the ctor or dtor list. This just prints out the
264 /// function pointers, ignoring the init priority.
265 void AsmPrinter::EmitXXStructorList(Constant *List) {
266 // Should be an array of '{ int, void ()* }' structs. The first value is the
267 // init priority, which we ignore.
268 if (!isa<ConstantArray>(List)) return;
269 ConstantArray *InitList = cast<ConstantArray>(List);
270 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
271 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
272 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
274 if (CS->getOperand(1)->isNullValue())
275 return; // Found a null terminator, exit printing.
276 // Emit the function pointer.
277 EmitGlobalConstant(CS->getOperand(1));
281 /// getPreferredAlignmentLog - Return the preferred alignment of the
282 /// specified global, returned in log form. This includes an explicitly
283 /// requested alignment (if the global has one).
284 unsigned AsmPrinter::getPreferredAlignmentLog(const GlobalVariable *GV) const {
285 const Type *ElemType = GV->getType()->getElementType();
286 unsigned Alignment = TM.getTargetData()->getTypeAlignmentShift(ElemType);
287 if (GV->getAlignment() > (1U << Alignment))
288 Alignment = Log2_32(GV->getAlignment());
290 if (GV->hasInitializer()) {
291 // Always round up alignment of global doubles to 8 bytes.
292 if (GV->getType()->getElementType() == Type::DoubleTy && Alignment < 3)
295 // If the global is not external, see if it is large. If so, give it a
297 if (TM.getTargetData()->getTypeSize(ElemType) > 128)
298 Alignment = 4; // 16-byte alignment.
304 // EmitAlignment - Emit an alignment directive to the specified power of two.
305 void AsmPrinter::EmitAlignment(unsigned NumBits, const GlobalValue *GV) const {
306 if (GV && GV->getAlignment())
307 NumBits = Log2_32(GV->getAlignment());
308 if (NumBits == 0) return; // No need to emit alignment.
309 if (AlignmentIsInBytes) NumBits = 1 << NumBits;
310 O << AlignDirective << NumBits << "\n";
313 /// EmitZeros - Emit a block of zeros.
315 void AsmPrinter::EmitZeros(uint64_t NumZeros) const {
318 O << ZeroDirective << NumZeros;
319 if (ZeroDirectiveSuffix)
320 O << ZeroDirectiveSuffix;
323 for (; NumZeros; --NumZeros)
324 O << Data8bitsDirective << "0\n";
329 // Print out the specified constant, without a storage class. Only the
330 // constants valid in constant expressions can occur here.
331 void AsmPrinter::EmitConstantValueOnly(const Constant *CV) {
332 if (CV->isNullValue() || isa<UndefValue>(CV))
334 else if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV)) {
335 assert(CB == ConstantBool::True);
337 } else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV))
338 if (((CI->getValue() << 32) >> 32) == CI->getValue())
341 O << (uint64_t)CI->getValue();
342 else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV))
344 else if (const GlobalValue *GV = dyn_cast<GlobalValue>(CV)) {
345 // This is a constant address for a global variable or function. Use the
346 // name of the variable or function as the address value, possibly
347 // decorating it with GlobalVarAddrPrefix/Suffix or
348 // FunctionAddrPrefix/Suffix (these all default to "" )
349 if (isa<Function>(GV))
350 O << FunctionAddrPrefix << Mang->getValueName(GV) << FunctionAddrSuffix;
352 O << GlobalVarAddrPrefix << Mang->getValueName(GV) << GlobalVarAddrSuffix;
353 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
354 const TargetData *TD = TM.getTargetData();
355 switch(CE->getOpcode()) {
356 case Instruction::GetElementPtr: {
357 // generate a symbolic expression for the byte address
358 const Constant *ptrVal = CE->getOperand(0);
359 std::vector<Value*> idxVec(CE->op_begin()+1, CE->op_end());
360 if (int64_t Offset = TD->getIndexedOffset(ptrVal->getType(), idxVec)) {
363 EmitConstantValueOnly(ptrVal);
365 O << ") + " << Offset;
367 O << ") - " << -Offset;
369 EmitConstantValueOnly(ptrVal);
373 case Instruction::Cast: {
374 // Support only non-converting or widening casts for now, that is, ones
375 // that do not involve a change in value. This assertion is really gross,
376 // and may not even be a complete check.
377 Constant *Op = CE->getOperand(0);
378 const Type *OpTy = Op->getType(), *Ty = CE->getType();
380 // Remember, kids, pointers can be losslessly converted back and forth
381 // into 32-bit or wider integers, regardless of signedness. :-P
382 assert(((isa<PointerType>(OpTy)
383 && (Ty == Type::LongTy || Ty == Type::ULongTy
384 || Ty == Type::IntTy || Ty == Type::UIntTy))
385 || (isa<PointerType>(Ty)
386 && (OpTy == Type::LongTy || OpTy == Type::ULongTy
387 || OpTy == Type::IntTy || OpTy == Type::UIntTy))
388 || (((TD->getTypeSize(Ty) >= TD->getTypeSize(OpTy))
389 && OpTy->isLosslesslyConvertibleTo(Ty))))
390 && "FIXME: Don't yet support this kind of constant cast expr");
391 EmitConstantValueOnly(Op);
394 case Instruction::Add:
396 EmitConstantValueOnly(CE->getOperand(0));
398 EmitConstantValueOnly(CE->getOperand(1));
402 assert(0 && "Unsupported operator!");
405 assert(0 && "Unknown constant value!");
409 /// toOctal - Convert the low order bits of X into an octal digit.
411 static inline char toOctal(int X) {
415 /// printAsCString - Print the specified array as a C compatible string, only if
416 /// the predicate isString is true.
418 static void printAsCString(std::ostream &O, const ConstantArray *CVA,
420 assert(CVA->isString() && "Array is not string compatible!");
423 for (unsigned i = 0; i != LastElt; ++i) {
425 (unsigned char)cast<ConstantInt>(CVA->getOperand(i))->getRawValue();
429 } else if (C == '\\') {
431 } else if (isprint(C)) {
435 case '\b': O << "\\b"; break;
436 case '\f': O << "\\f"; break;
437 case '\n': O << "\\n"; break;
438 case '\r': O << "\\r"; break;
439 case '\t': O << "\\t"; break;
442 O << toOctal(C >> 6);
443 O << toOctal(C >> 3);
444 O << toOctal(C >> 0);
452 /// EmitString - Emit a zero-byte-terminated string constant.
454 void AsmPrinter::EmitString(const ConstantArray *CVA) const {
455 unsigned NumElts = CVA->getNumOperands();
456 if (AscizDirective && NumElts &&
457 cast<ConstantInt>(CVA->getOperand(NumElts-1))->getRawValue() == 0) {
459 printAsCString(O, CVA, NumElts-1);
462 printAsCString(O, CVA, NumElts);
467 /// EmitGlobalConstant - Print a general LLVM constant to the .s file.
469 void AsmPrinter::EmitGlobalConstant(const Constant *CV) {
470 const TargetData *TD = TM.getTargetData();
472 if (CV->isNullValue() || isa<UndefValue>(CV)) {
473 EmitZeros(TD->getTypeSize(CV->getType()));
475 } else if (const ConstantArray *CVA = dyn_cast<ConstantArray>(CV)) {
476 if (CVA->isString()) {
478 } else { // Not a string. Print the values in successive locations
479 for (unsigned i = 0, e = CVA->getNumOperands(); i != e; ++i)
480 EmitGlobalConstant(CVA->getOperand(i));
483 } else if (const ConstantStruct *CVS = dyn_cast<ConstantStruct>(CV)) {
484 // Print the fields in successive locations. Pad to align if needed!
485 const StructLayout *cvsLayout = TD->getStructLayout(CVS->getType());
486 uint64_t sizeSoFar = 0;
487 for (unsigned i = 0, e = CVS->getNumOperands(); i != e; ++i) {
488 const Constant* field = CVS->getOperand(i);
490 // Check if padding is needed and insert one or more 0s.
491 uint64_t fieldSize = TD->getTypeSize(field->getType());
492 uint64_t padSize = ((i == e-1? cvsLayout->StructSize
493 : cvsLayout->MemberOffsets[i+1])
494 - cvsLayout->MemberOffsets[i]) - fieldSize;
495 sizeSoFar += fieldSize + padSize;
497 // Now print the actual field value
498 EmitGlobalConstant(field);
500 // Insert the field padding unless it's zero bytes...
503 assert(sizeSoFar == cvsLayout->StructSize &&
504 "Layout of constant struct may be incorrect!");
506 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
507 // FP Constants are printed as integer constants to avoid losing
509 double Val = CFP->getValue();
510 if (CFP->getType() == Type::DoubleTy) {
511 if (Data64bitsDirective)
512 O << Data64bitsDirective << DoubleToBits(Val) << "\t" << CommentString
513 << " double value: " << Val << "\n";
514 else if (TD->isBigEndian()) {
515 O << Data32bitsDirective << unsigned(DoubleToBits(Val) >> 32)
516 << "\t" << CommentString << " double most significant word "
518 O << Data32bitsDirective << unsigned(DoubleToBits(Val))
519 << "\t" << CommentString << " double least significant word "
522 O << Data32bitsDirective << unsigned(DoubleToBits(Val))
523 << "\t" << CommentString << " double least significant word " << Val
525 O << Data32bitsDirective << unsigned(DoubleToBits(Val) >> 32)
526 << "\t" << CommentString << " double most significant word " << Val
531 O << Data32bitsDirective << FloatToBits(Val) << "\t" << CommentString
532 << " float " << Val << "\n";
535 } else if (CV->getType() == Type::ULongTy || CV->getType() == Type::LongTy) {
536 if (const ConstantInt *CI = dyn_cast<ConstantInt>(CV)) {
537 uint64_t Val = CI->getRawValue();
539 if (Data64bitsDirective)
540 O << Data64bitsDirective << Val << "\n";
541 else if (TD->isBigEndian()) {
542 O << Data32bitsDirective << unsigned(Val >> 32)
543 << "\t" << CommentString << " Double-word most significant word "
545 O << Data32bitsDirective << unsigned(Val)
546 << "\t" << CommentString << " Double-word least significant word "
549 O << Data32bitsDirective << unsigned(Val)
550 << "\t" << CommentString << " Double-word least significant word "
552 O << Data32bitsDirective << unsigned(Val >> 32)
553 << "\t" << CommentString << " Double-word most significant word "
558 } else if (const ConstantPacked *CP = dyn_cast<ConstantPacked>(CV)) {
559 const PackedType *PTy = CP->getType();
561 for (unsigned I = 0, E = PTy->getNumElements(); I < E; ++I)
562 EmitGlobalConstant(CP->getOperand(I));
567 const Type *type = CV->getType();
568 switch (type->getTypeID()) {
570 case Type::UByteTyID: case Type::SByteTyID:
571 O << Data8bitsDirective;
573 case Type::UShortTyID: case Type::ShortTyID:
574 O << Data16bitsDirective;
576 case Type::PointerTyID:
577 if (TD->getPointerSize() == 8) {
578 assert(Data64bitsDirective &&
579 "Target cannot handle 64-bit pointer exprs!");
580 O << Data64bitsDirective;
583 //Fall through for pointer size == int size
584 case Type::UIntTyID: case Type::IntTyID:
585 O << Data32bitsDirective;
587 case Type::ULongTyID: case Type::LongTyID:
588 assert(Data64bitsDirective &&"Target cannot handle 64-bit constant exprs!");
589 O << Data64bitsDirective;
591 case Type::FloatTyID: case Type::DoubleTyID:
592 assert (0 && "Should have already output floating point constant.");
594 assert (0 && "Can't handle printing this type of thing");
597 EmitConstantValueOnly(CV);
601 /// printInlineAsm - This method formats and prints the specified machine
602 /// instruction that is an inline asm.
603 void AsmPrinter::printInlineAsm(const MachineInstr *MI) const {
604 O << InlineAsmStart << "\n\t";
605 unsigned NumOperands = MI->getNumOperands();
607 // Count the number of register definitions.
608 unsigned NumDefs = 0;
609 for (; MI->getOperand(NumDefs).isDef(); ++NumDefs)
610 assert(NumDefs != NumOperands-1 && "No asm string?");
612 assert(MI->getOperand(NumDefs).isExternalSymbol() && "No asm string?");
614 // Disassemble the AsmStr, printing out the literal pieces, the operands, etc.
615 const char *AsmStr = MI->getOperand(NumDefs).getSymbolName();
617 // The variant of the current asmprinter: FIXME: change.
618 int AsmPrinterVariant = 0;
620 int CurVariant = -1; // The number of the {.|.|.} region we are in.
621 const char *LastEmitted = AsmStr; // One past the last character emitted.
623 while (*LastEmitted) {
624 switch (*LastEmitted) {
626 // Not a special case, emit the string section literally.
627 const char *LiteralEnd = LastEmitted+1;
628 while (*LiteralEnd && *LiteralEnd != '{' && *LiteralEnd != '|' &&
629 *LiteralEnd != '}' && *LiteralEnd != '$' && *LiteralEnd != '\n')
631 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
632 O.write(LastEmitted, LiteralEnd-LastEmitted);
633 LastEmitted = LiteralEnd;
637 ++LastEmitted; // Consume newline character.
638 O << "\n\t"; // Indent code with newline.
641 ++LastEmitted; // Consume '$' character.
642 if (*LastEmitted == '$') { // $$ -> $
643 if (CurVariant == -1 || CurVariant == AsmPrinterVariant)
645 ++LastEmitted; // Consume second '$' character.
649 bool HasCurlyBraces = false;
650 if (*LastEmitted == '{') { // ${variable}
651 ++LastEmitted; // Consume '{' character.
652 HasCurlyBraces = true;
655 const char *IDStart = LastEmitted;
657 long Val = strtol(IDStart, &IDEnd, 10); // We only accept numbers for IDs.
658 if (!isdigit(*IDStart) || (Val == 0 && errno == EINVAL)) {
659 std::cerr << "Bad $ operand number in inline asm string: '"
665 char Modifier[2] = { 0, 0 };
667 if (HasCurlyBraces) {
668 // If we have curly braces, check for a modifier character. This
669 // supports syntax like ${0:u}, which correspond to "%u0" in GCC asm.
670 if (*LastEmitted == ':') {
671 ++LastEmitted; // Consume ':' character.
672 if (*LastEmitted == 0) {
673 std::cerr << "Bad ${:} expression in inline asm string: '"
678 Modifier[0] = *LastEmitted;
679 ++LastEmitted; // Consume modifier character.
682 if (*LastEmitted != '}') {
683 std::cerr << "Bad ${} expression in inline asm string: '"
687 ++LastEmitted; // Consume '}' character.
690 if ((unsigned)Val >= NumOperands-1) {
691 std::cerr << "Invalid $ operand number in inline asm string: '"
696 // Okay, we finally have a value number. Ask the target to print this
698 if (CurVariant == -1 || CurVariant == AsmPrinterVariant) {
703 // Scan to find the machine operand number for the operand.
705 if (OpNo >= MI->getNumOperands()) break;
706 unsigned OpFlags = MI->getOperand(OpNo).getImmedValue();
707 OpNo += (OpFlags >> 3) + 1;
710 if (OpNo >= MI->getNumOperands()) {
713 unsigned OpFlags = MI->getOperand(OpNo).getImmedValue();
714 ++OpNo; // Skip over the ID number.
716 AsmPrinter *AP = const_cast<AsmPrinter*>(this);
717 if ((OpFlags & 7) == 4 /*ADDR MODE*/) {
718 Error = AP->PrintAsmMemoryOperand(MI, OpNo, AsmPrinterVariant,
719 Modifier[0] ? Modifier : 0);
721 Error = AP->PrintAsmOperand(MI, OpNo, AsmPrinterVariant,
722 Modifier[0] ? Modifier : 0);
726 std::cerr << "Invalid operand found in inline asm: '"
735 ++LastEmitted; // Consume '{' character.
736 if (CurVariant != -1) {
737 std::cerr << "Nested variants found in inline asm string: '"
741 CurVariant = 0; // We're in the first variant now.
744 ++LastEmitted; // consume '|' character.
745 if (CurVariant == -1) {
746 std::cerr << "Found '|' character outside of variant in inline asm "
747 << "string: '" << AsmStr << "'\n";
750 ++CurVariant; // We're in the next variant.
753 ++LastEmitted; // consume '}' character.
754 if (CurVariant == -1) {
755 std::cerr << "Found '}' character outside of variant in inline asm "
756 << "string: '" << AsmStr << "'\n";
763 O << "\n\t" << InlineAsmEnd << "\n";
766 /// PrintAsmOperand - Print the specified operand of MI, an INLINEASM
767 /// instruction, using the specified assembler variant. Targets should
768 /// overried this to format as appropriate.
769 bool AsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
770 unsigned AsmVariant, const char *ExtraCode) {
771 // Target doesn't support this yet!
775 bool AsmPrinter::PrintAsmMemoryOperand(const MachineInstr *MI, unsigned OpNo,
777 const char *ExtraCode) {
778 // Target doesn't support this yet!
782 /// printBasicBlockLabel - This method prints the label for the specified
783 /// MachineBasicBlock
784 void AsmPrinter::printBasicBlockLabel(const MachineBasicBlock *MBB,
786 bool printComment) const {
787 O << PrivateGlobalPrefix << "BB" << FunctionNumber << "_"
792 O << '\t' << CommentString << MBB->getBasicBlock()->getName();