AsmWriter.cpp revision 8f410cac044a21a94afece41345ccd9b72047675
1//===-- Writer.cpp - Library for Printing VM assembly files ------*- C++ -*--=// 2// 3// This library implements the functionality defined in llvm/Assembly/Writer.h 4// 5// This library uses the Analysis library to figure out offsets for 6// variables in the method tables... 7// 8// TODO: print out the type name instead of the full type if a particular type 9// is in the symbol table... 10// 11//===----------------------------------------------------------------------===// 12 13#include "llvm/Assembly/Writer.h" 14#include "llvm/Analysis/SlotCalculator.h" 15#include "llvm/Module.h" 16#include "llvm/Method.h" 17#include "llvm/GlobalVariable.h" 18#include "llvm/BasicBlock.h" 19#include "llvm/ConstPoolVals.h" 20#include "llvm/iOther.h" 21#include "llvm/iMemory.h" 22#include "llvm/iTerminators.h" 23#include "llvm/SymbolTable.h" 24#include "llvm/Support/STLExtras.h" 25#include "llvm/Support/StringExtras.h" 26#include <algorithm> 27#include <map> 28 29static const Module *getModuleFromVal(const Value *V) { 30 if (const MethodArgument *MA =dyn_cast<const MethodArgument>(V)) 31 return MA->getParent() ? MA->getParent()->getParent() : 0; 32 else if (const BasicBlock *BB = dyn_cast<const BasicBlock>(V)) 33 return BB->getParent() ? BB->getParent()->getParent() : 0; 34 else if (const Instruction *I = dyn_cast<const Instruction>(V)) { 35 const Method *M = I->getParent() ? I->getParent()->getParent() : 0; 36 return M ? M->getParent() : 0; 37 } else if (const GlobalValue *GV =dyn_cast<const GlobalValue>(V)) 38 return GV->getParent(); 39 else if (const Module *Mod = dyn_cast<const Module>(V)) 40 return Mod; 41 return 0; 42} 43 44static SlotCalculator *createSlotCalculator(const Value *V) { 45 assert(!isa<Type>(V) && "Can't create an SC for a type!"); 46 if (const MethodArgument *MA =dyn_cast<const MethodArgument>(V)){ 47 return new SlotCalculator(MA->getParent(), true); 48 } else if (const Instruction *I = dyn_cast<const Instruction>(V)) { 49 return new SlotCalculator(I->getParent()->getParent(), true); 50 } else if (const BasicBlock *BB = dyn_cast<const BasicBlock>(V)) { 51 return new SlotCalculator(BB->getParent(), true); 52 } else if (const GlobalVariable *GV =dyn_cast<const GlobalVariable>(V)){ 53 return new SlotCalculator(GV->getParent(), true); 54 } else if (const Method *Meth = dyn_cast<const Method>(V)) { 55 return new SlotCalculator(Meth, true); 56 } else if (const Module *Mod = dyn_cast<const Module>(V)) { 57 return new SlotCalculator(Mod, true); 58 } 59 return 0; 60} 61 62// WriteAsOperand - Write the name of the specified value out to the specified 63// ostream. This can be useful when you just want to print int %reg126, not the 64// whole instruction that generated it. 65// 66static void WriteAsOperandInternal(ostream &Out, const Value *V, bool PrintName, 67 SlotCalculator *Table) { 68 if (PrintName && V->hasName()) { 69 Out << " %" << V->getName(); 70 } else { 71 if (const ConstPoolVal *CPV = dyn_cast<const ConstPoolVal>(V)) { 72 Out << " " << CPV->getStrValue(); 73 } else { 74 int Slot; 75 if (Table) { 76 Slot = Table->getValSlot(V); 77 } else { 78 if (const Type *Ty = dyn_cast<const Type>(V)) { 79 Out << " " << Ty->getDescription(); 80 return; 81 } 82 83 Table = createSlotCalculator(V); 84 if (Table == 0) { Out << "BAD VALUE TYPE!"; return; } 85 86 Slot = Table->getValSlot(V); 87 delete Table; 88 } 89 if (Slot >= 0) Out << " %" << Slot; 90 else if (PrintName) 91 Out << "<badref>"; // Not embeded into a location? 92 } 93 } 94} 95 96 97// If the module has a symbol table, take all global types and stuff their 98// names into the TypeNames map. 99// 100static void fillTypeNameTable(const Module *M, 101 map<const Type *, string> &TypeNames) { 102 if (M && M->hasSymbolTable()) { 103 const SymbolTable *ST = M->getSymbolTable(); 104 SymbolTable::const_iterator PI = ST->find(Type::TypeTy); 105 if (PI != ST->end()) { 106 SymbolTable::type_const_iterator I = PI->second.begin(); 107 for (; I != PI->second.end(); ++I) { 108 // As a heuristic, don't insert pointer to primitive types, because 109 // they are used too often to have a single useful name. 110 // 111 const Type *Ty = cast<const Type>(I->second); 112 if (!isa<PointerType>(Ty) || 113 !cast<PointerType>(Ty)->getValueType()->isPrimitiveType()) 114 TypeNames.insert(make_pair(Ty, "%"+I->first)); 115 } 116 } 117 } 118} 119 120 121 122static string calcTypeName(const Type *Ty, vector<const Type *> &TypeStack, 123 map<const Type *, string> &TypeNames) { 124 if (Ty->isPrimitiveType()) return Ty->getDescription(); // Base case 125 126 // Check to see if the type is named. 127 map<const Type *, string>::iterator I = TypeNames.find(Ty); 128 if (I != TypeNames.end()) return I->second; 129 130 // Check to see if the Type is already on the stack... 131 unsigned Slot = 0, CurSize = TypeStack.size(); 132 while (Slot < CurSize && TypeStack[Slot] != Ty) ++Slot; // Scan for type 133 134 // This is another base case for the recursion. In this case, we know 135 // that we have looped back to a type that we have previously visited. 136 // Generate the appropriate upreference to handle this. 137 // 138 if (Slot < CurSize) 139 return "\\" + utostr(CurSize-Slot); // Here's the upreference 140 141 TypeStack.push_back(Ty); // Recursive case: Add us to the stack.. 142 143 string Result; 144 switch (Ty->getPrimitiveID()) { 145 case Type::MethodTyID: { 146 const MethodType *MTy = cast<const MethodType>(Ty); 147 Result = calcTypeName(MTy->getReturnType(), TypeStack, TypeNames) + " ("; 148 for (MethodType::ParamTypes::const_iterator 149 I = MTy->getParamTypes().begin(), 150 E = MTy->getParamTypes().end(); I != E; ++I) { 151 if (I != MTy->getParamTypes().begin()) 152 Result += ", "; 153 Result += calcTypeName(*I, TypeStack, TypeNames); 154 } 155 if (MTy->isVarArg()) { 156 if (!MTy->getParamTypes().empty()) Result += ", "; 157 Result += "..."; 158 } 159 Result += ")"; 160 break; 161 } 162 case Type::StructTyID: { 163 const StructType *STy = cast<const StructType>(Ty); 164 Result = "{ "; 165 for (StructType::ElementTypes::const_iterator 166 I = STy->getElementTypes().begin(), 167 E = STy->getElementTypes().end(); I != E; ++I) { 168 if (I != STy->getElementTypes().begin()) 169 Result += ", "; 170 Result += calcTypeName(*I, TypeStack, TypeNames); 171 } 172 Result += " }"; 173 break; 174 } 175 case Type::PointerTyID: 176 Result = calcTypeName(cast<const PointerType>(Ty)->getValueType(), 177 TypeStack, TypeNames) + " *"; 178 break; 179 case Type::ArrayTyID: { 180 const ArrayType *ATy = cast<const ArrayType>(Ty); 181 int NumElements = ATy->getNumElements(); 182 Result = "["; 183 if (NumElements != -1) Result += itostr(NumElements) + " x "; 184 Result += calcTypeName(ATy->getElementType(), TypeStack, TypeNames) + "]"; 185 break; 186 } 187 default: 188 assert(0 && "Unhandled case in getTypeProps!"); 189 Result = "<error>"; 190 } 191 192 TypeStack.pop_back(); // Remove self from stack... 193 return Result; 194} 195 196 197// printTypeInt - The internal guts of printing out a type that has a 198// potentially named portion. 199// 200static ostream &printTypeInt(ostream &Out, const Type *Ty, 201 map<const Type *, string> &TypeNames) { 202 // Primitive types always print out their description, regardless of whether 203 // they have been named or not. 204 // 205 if (Ty->isPrimitiveType()) return Out << Ty->getDescription(); 206 207 // Check to see if the type is named. 208 map<const Type *, string>::iterator I = TypeNames.find(Ty); 209 if (I != TypeNames.end()) return Out << I->second; 210 211 // Otherwise we have a type that has not been named but is a derived type. 212 // Carefully recurse the type hierarchy to print out any contained symbolic 213 // names. 214 // 215 vector<const Type *> TypeStack; 216 string TypeName = calcTypeName(Ty, TypeStack, TypeNames); 217 TypeNames.insert(make_pair(Ty, TypeName)); // Cache type name for later use 218 return Out << TypeName; 219} 220 221 222// WriteTypeSymbolic - This attempts to write the specified type as a symbolic 223// type, iff there is an entry in the modules symbol table for the specified 224// type or one of it's component types. This is slower than a simple x << Type; 225// 226ostream &WriteTypeSymbolic(ostream &Out, const Type *Ty, const Module *M) { 227 Out << " "; 228 229 // If they want us to print out a type, attempt to make it symbolic if there 230 // is a symbol table in the module... 231 if (M && M->hasSymbolTable()) { 232 map<const Type *, string> TypeNames; 233 fillTypeNameTable(M, TypeNames); 234 235 return printTypeInt(Out, Ty, TypeNames); 236 } else { 237 return Out << Ty->getDescription(); 238 } 239} 240 241 242// WriteAsOperand - Write the name of the specified value out to the specified 243// ostream. This can be useful when you just want to print int %reg126, not the 244// whole instruction that generated it. 245// 246ostream &WriteAsOperand(ostream &Out, const Value *V, bool PrintType, 247 bool PrintName, SlotCalculator *Table) { 248 if (PrintType) 249 WriteTypeSymbolic(Out, V->getType(), getModuleFromVal(V)); 250 251 WriteAsOperandInternal(Out, V, PrintName, Table); 252 return Out; 253} 254 255 256 257class AssemblyWriter { 258 ostream &Out; 259 SlotCalculator &Table; 260 const Module *TheModule; 261 map<const Type *, string> TypeNames; 262public: 263 inline AssemblyWriter(ostream &o, SlotCalculator &Tab, const Module *M) 264 : Out(o), Table(Tab), TheModule(M) { 265 266 // If the module has a symbol table, take all global types and stuff their 267 // names into the TypeNames map. 268 // 269 fillTypeNameTable(M, TypeNames); 270 } 271 272 inline void write(const Module *M) { printModule(M); } 273 inline void write(const GlobalVariable *G) { printGlobal(G); } 274 inline void write(const Method *M) { printMethod(M); } 275 inline void write(const BasicBlock *BB) { printBasicBlock(BB); } 276 inline void write(const Instruction *I) { printInstruction(I); } 277 inline void write(const ConstPoolVal *CPV) { printConstant(CPV); } 278 279private : 280 void printModule(const Module *M); 281 void printSymbolTable(const SymbolTable &ST); 282 void printConstant(const ConstPoolVal *CPV); 283 void printGlobal(const GlobalVariable *GV); 284 void printMethod(const Method *M); 285 void printMethodArgument(const MethodArgument *MA); 286 void printBasicBlock(const BasicBlock *BB); 287 void printInstruction(const Instruction *I); 288 ostream &printType(const Type *Ty); 289 290 void writeOperand(const Value *Op, bool PrintType, bool PrintName = true); 291 292 // printInfoComment - Print a little comment after the instruction indicating 293 // which slot it occupies. 294 void printInfoComment(const Value *V); 295}; 296 297 298void AssemblyWriter::writeOperand(const Value *Operand, bool PrintType, 299 bool PrintName) { 300 if (PrintType) { Out << " "; printType(Operand->getType()); } 301 WriteAsOperandInternal(Out, Operand, PrintName, &Table); 302} 303 304 305void AssemblyWriter::printModule(const Module *M) { 306 // Loop over the symbol table, emitting all named constants... 307 if (M->hasSymbolTable()) 308 printSymbolTable(*M->getSymbolTable()); 309 310 for_each(M->gbegin(), M->gend(), 311 bind_obj(this, &AssemblyWriter::printGlobal)); 312 313 Out << "implementation\n"; 314 315 // Output all of the methods... 316 for_each(M->begin(), M->end(), bind_obj(this,&AssemblyWriter::printMethod)); 317} 318 319void AssemblyWriter::printGlobal(const GlobalVariable *GV) { 320 if (GV->hasName()) Out << "%" << GV->getName() << " = "; 321 322 if (!GV->hasInitializer()) Out << "uninitialized "; 323 324 Out << (GV->isConstant() ? "constant " : "global "); 325 printType(GV->getType()->getValueType()); 326 327 if (GV->hasInitializer()) 328 writeOperand(GV->getInitializer(), false, false); 329 330 printInfoComment(GV); 331 Out << endl; 332} 333 334 335// printSymbolTable - Run through symbol table looking for named constants 336// if a named constant is found, emit it's declaration... 337// 338void AssemblyWriter::printSymbolTable(const SymbolTable &ST) { 339 for (SymbolTable::const_iterator TI = ST.begin(); TI != ST.end(); ++TI) { 340 SymbolTable::type_const_iterator I = ST.type_begin(TI->first); 341 SymbolTable::type_const_iterator End = ST.type_end(TI->first); 342 343 for (; I != End; ++I) { 344 const Value *V = I->second; 345 if (const ConstPoolVal *CPV = dyn_cast<const ConstPoolVal>(V)) { 346 printConstant(CPV); 347 } else if (const Type *Ty = dyn_cast<const Type>(V)) { 348 Out << "\t%" << I->first << " = type " << Ty->getDescription() << endl; 349 } 350 } 351 } 352} 353 354 355// printConstant - Print out a constant pool entry... 356// 357void AssemblyWriter::printConstant(const ConstPoolVal *CPV) { 358 // Don't print out unnamed constants, they will be inlined 359 if (!CPV->hasName()) return; 360 361 // Print out name... 362 Out << "\t%" << CPV->getName() << " = "; 363 364 // Print out the constant type... 365 printType(CPV->getType()); 366 367 // Write the value out now... 368 writeOperand(CPV, false, false); 369 370 if (!CPV->hasName() && CPV->getType() != Type::VoidTy) { 371 int Slot = Table.getValSlot(CPV); // Print out the def slot taken... 372 Out << "\t\t; <"; 373 printType(CPV->getType()) << ">:"; 374 if (Slot >= 0) Out << Slot; 375 else Out << "<badref>"; 376 } 377 378 Out << endl; 379} 380 381// printMethod - Print all aspects of a method. 382// 383void AssemblyWriter::printMethod(const Method *M) { 384 // Print out the return type and name... 385 Out << "\n" << (M->isExternal() ? "declare " : ""); 386 printType(M->getReturnType()) << " \"" << M->getName() << "\"("; 387 Table.incorporateMethod(M); 388 389 // Loop over the arguments, printing them... 390 const MethodType *MT = cast<const MethodType>(M->getMethodType()); 391 392 if (!M->isExternal()) { 393 for_each(M->getArgumentList().begin(), M->getArgumentList().end(), 394 bind_obj(this, &AssemblyWriter::printMethodArgument)); 395 } else { 396 // Loop over the arguments, printing them... 397 const MethodType *MT = cast<const MethodType>(M->getMethodType()); 398 for (MethodType::ParamTypes::const_iterator I = MT->getParamTypes().begin(), 399 E = MT->getParamTypes().end(); I != E; ++I) { 400 if (I != MT->getParamTypes().begin()) Out << ", "; 401 printType(*I); 402 } 403 } 404 405 // Finish printing arguments... 406 if (MT->isVarArg()) { 407 if (MT->getParamTypes().size()) Out << ", "; 408 Out << "..."; // Output varargs portion of signature! 409 } 410 Out << ")\n"; 411 412 if (!M->isExternal()) { 413 // Loop over the symbol table, emitting all named constants... 414 if (M->hasSymbolTable()) 415 printSymbolTable(*M->getSymbolTable()); 416 417 Out << "begin"; 418 419 // Output all of its basic blocks... for the method 420 for_each(M->begin(), M->end(), 421 bind_obj(this, &AssemblyWriter::printBasicBlock)); 422 423 Out << "end\n"; 424 } 425 426 Table.purgeMethod(); 427} 428 429// printMethodArgument - This member is called for every argument that 430// is passed into the method. Simply print it out 431// 432void AssemblyWriter::printMethodArgument(const MethodArgument *Arg) { 433 // Insert commas as we go... the first arg doesn't get a comma 434 if (Arg != Arg->getParent()->getArgumentList().front()) Out << ", "; 435 436 // Output type... 437 printType(Arg->getType()); 438 439 // Output name, if available... 440 if (Arg->hasName()) 441 Out << " %" << Arg->getName(); 442 else if (Table.getValSlot(Arg) < 0) 443 Out << "<badref>"; 444} 445 446// printBasicBlock - This member is called for each basic block in a methd. 447// 448void AssemblyWriter::printBasicBlock(const BasicBlock *BB) { 449 if (BB->hasName()) { // Print out the label if it exists... 450 Out << "\n" << BB->getName() << ":"; 451 } else { 452 int Slot = Table.getValSlot(BB); 453 Out << "\n; <label>:"; 454 if (Slot >= 0) 455 Out << Slot; // Extra newline seperates out label's 456 else 457 Out << "<badref>"; 458 } 459 Out << "\t\t\t\t\t;[#uses=" << BB->use_size() << "]\n"; // Output # uses 460 461 // Output all of the instructions in the basic block... 462 for_each(BB->begin(), BB->end(), 463 bind_obj(this, &AssemblyWriter::printInstruction)); 464} 465 466 467// printInfoComment - Print a little comment after the instruction indicating 468// which slot it occupies. 469// 470void AssemblyWriter::printInfoComment(const Value *V) { 471 if (V->getType() != Type::VoidTy) { 472 Out << "\t\t; <"; 473 printType(V->getType()) << ">"; 474 475 if (!V->hasName()) { 476 int Slot = Table.getValSlot(V); // Print out the def slot taken... 477 if (Slot >= 0) Out << ":" << Slot; 478 else Out << ":<badref>"; 479 } 480 Out << "\t[#uses=" << V->use_size() << "]"; // Output # uses 481 } 482} 483 484// printInstruction - This member is called for each Instruction in a methd. 485// 486void AssemblyWriter::printInstruction(const Instruction *I) { 487 Out << "\t"; 488 489 // Print out name if it exists... 490 if (I && I->hasName()) 491 Out << "%" << I->getName() << " = "; 492 493 // Print out the opcode... 494 Out << I->getOpcodeName(); 495 496 // Print out the type of the operands... 497 const Value *Operand = I->getNumOperands() ? I->getOperand(0) : 0; 498 499 // Special case conditional branches to swizzle the condition out to the front 500 if (I->getOpcode() == Instruction::Br && I->getNumOperands() > 1) { 501 writeOperand(I->getOperand(2), true); 502 Out << ","; 503 writeOperand(Operand, true); 504 Out << ","; 505 writeOperand(I->getOperand(1), true); 506 507 } else if (I->getOpcode() == Instruction::Switch) { 508 // Special case switch statement to get formatting nice and correct... 509 writeOperand(Operand , true); Out << ","; 510 writeOperand(I->getOperand(1), true); Out << " ["; 511 512 for (unsigned op = 2, Eop = I->getNumOperands(); op < Eop; op += 2) { 513 Out << "\n\t\t"; 514 writeOperand(I->getOperand(op ), true); Out << ","; 515 writeOperand(I->getOperand(op+1), true); 516 } 517 Out << "\n\t]"; 518 } else if (isa<PHINode>(I)) { 519 Out << " "; 520 printType(I->getType()); 521 522 for (unsigned op = 0, Eop = I->getNumOperands(); op < Eop; op += 2) { 523 if (op) Out << ", "; 524 Out << "["; 525 writeOperand(I->getOperand(op ), false); Out << ","; 526 writeOperand(I->getOperand(op+1), false); Out << " ]"; 527 } 528 } else if (isa<ReturnInst>(I) && !Operand) { 529 Out << " void"; 530 } else if (isa<CallInst>(I)) { 531 // TODO: Should try to print out short form of the Call instruction 532 writeOperand(Operand, true); 533 Out << "("; 534 if (I->getNumOperands() > 1) writeOperand(I->getOperand(1), true); 535 for (unsigned op = 2, Eop = I->getNumOperands(); op < Eop; ++op) { 536 Out << ","; 537 writeOperand(I->getOperand(op), true); 538 } 539 540 Out << " )"; 541 } else if (const InvokeInst *II = dyn_cast<InvokeInst>(I)) { 542 // TODO: Should try to print out short form of the Invoke instruction 543 writeOperand(Operand, true); 544 Out << "("; 545 if (I->getNumOperands() > 3) writeOperand(I->getOperand(3), true); 546 for (unsigned op = 4, Eop = I->getNumOperands(); op < Eop; ++op) { 547 Out << ","; 548 writeOperand(I->getOperand(op), true); 549 } 550 551 Out << " )\n\t\t\tto"; 552 writeOperand(II->getNormalDest(), true); 553 Out << " except"; 554 writeOperand(II->getExceptionalDest(), true); 555 556 } else if (I->getOpcode() == Instruction::Malloc || 557 I->getOpcode() == Instruction::Alloca) { 558 Out << " "; 559 printType(cast<const PointerType>(I->getType())->getValueType()); 560 if (I->getNumOperands()) { 561 Out << ","; 562 writeOperand(I->getOperand(0), true); 563 } 564 } else if (isa<CastInst>(I)) { 565 writeOperand(Operand, true); 566 Out << " to "; 567 printType(I->getType()); 568 } else if (Operand) { // Print the normal way... 569 570 // PrintAllTypes - Instructions who have operands of all the same type 571 // omit the type from all but the first operand. If the instruction has 572 // different type operands (for example br), then they are all printed. 573 bool PrintAllTypes = false; 574 const Type *TheType = Operand->getType(); 575 576 for (unsigned i = 1, E = I->getNumOperands(); i != E; ++i) { 577 Operand = I->getOperand(i); 578 if (Operand->getType() != TheType) { 579 PrintAllTypes = true; // We have differing types! Print them all! 580 break; 581 } 582 } 583 584 // Shift Left & Right print both types even for Ubyte LHS 585 if (isa<ShiftInst>(I)) PrintAllTypes = true; 586 587 if (!PrintAllTypes) { 588 Out << " "; 589 printType(I->getOperand(0)->getType()); 590 } 591 592 for (unsigned i = 0, E = I->getNumOperands(); i != E; ++i) { 593 if (i) Out << ","; 594 writeOperand(I->getOperand(i), PrintAllTypes); 595 } 596 } 597 598 printInfoComment(I); 599 Out << endl; 600} 601 602 603// printType - Go to extreme measures to attempt to print out a short, symbolic 604// version of a type name. 605// 606ostream &AssemblyWriter::printType(const Type *Ty) { 607 return printTypeInt(Out, Ty, TypeNames); 608} 609 610 611//===----------------------------------------------------------------------===// 612// External Interface declarations 613//===----------------------------------------------------------------------===// 614 615 616 617void WriteToAssembly(const Module *M, ostream &o) { 618 if (M == 0) { o << "<null> module\n"; return; } 619 SlotCalculator SlotTable(M, true); 620 AssemblyWriter W(o, SlotTable, M); 621 622 W.write(M); 623} 624 625void WriteToAssembly(const GlobalVariable *G, ostream &o) { 626 if (G == 0) { o << "<null> global variable\n"; return; } 627 SlotCalculator SlotTable(G->getParent(), true); 628 AssemblyWriter W(o, SlotTable, G->getParent()); 629 W.write(G); 630} 631 632void WriteToAssembly(const Method *M, ostream &o) { 633 if (M == 0) { o << "<null> method\n"; return; } 634 SlotCalculator SlotTable(M->getParent(), true); 635 AssemblyWriter W(o, SlotTable, M->getParent()); 636 637 W.write(M); 638} 639 640 641void WriteToAssembly(const BasicBlock *BB, ostream &o) { 642 if (BB == 0) { o << "<null> basic block\n"; return; } 643 644 SlotCalculator SlotTable(BB->getParent(), true); 645 AssemblyWriter W(o, SlotTable, 646 BB->getParent() ? BB->getParent()->getParent() : 0); 647 648 W.write(BB); 649} 650 651void WriteToAssembly(const ConstPoolVal *CPV, ostream &o) { 652 if (CPV == 0) { o << "<null> constant pool value\n"; return; } 653 o << " " << CPV->getType()->getDescription() << " " << CPV->getStrValue(); 654} 655 656void WriteToAssembly(const Instruction *I, ostream &o) { 657 if (I == 0) { o << "<null> instruction\n"; return; } 658 659 const Method *M = I->getParent() ? I->getParent()->getParent() : 0; 660 SlotCalculator SlotTable(M, true); 661 AssemblyWriter W(o, SlotTable, M ? M->getParent() : 0); 662 663 W.write(I); 664} 665