1 //===-- AsmWriter.cpp - Printing LLVM as an assembly file -----------------===//
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 library implements the functionality defined in llvm/Assembly/Writer.h
12 // Note that these routines must be extremely tolerant of various errors in the
13 // LLVM code, because it can be used for debugging transformations.
15 //===----------------------------------------------------------------------===//
17 #include "llvm/Assembly/CachedWriter.h"
18 #include "llvm/Assembly/Writer.h"
19 #include "llvm/Assembly/PrintModulePass.h"
20 #include "llvm/Assembly/AsmAnnotationWriter.h"
21 #include "llvm/Constants.h"
22 #include "llvm/DerivedTypes.h"
23 #include "llvm/Instruction.h"
24 #include "llvm/iMemory.h"
25 #include "llvm/iTerminators.h"
26 #include "llvm/iPHINode.h"
27 #include "llvm/iOther.h"
28 #include "llvm/Module.h"
29 #include "llvm/SymbolTable.h"
30 #include "llvm/Analysis/SlotCalculator.h"
31 #include "llvm/Assembly/Writer.h"
32 #include "llvm/Support/CFG.h"
33 #include "Support/StringExtras.h"
34 #include "Support/STLExtras.h"
38 static RegisterPass<PrintModulePass>
39 X("printm", "Print module to stderr",PassInfo::Analysis|PassInfo::Optimization);
40 static RegisterPass<PrintFunctionPass>
41 Y("print","Print function to stderr",PassInfo::Analysis|PassInfo::Optimization);
43 static void WriteAsOperandInternal(std::ostream &Out, const Value *V,
45 std::map<const Type *, std::string> &TypeTable,
46 SlotCalculator *Table);
48 static const Module *getModuleFromVal(const Value *V) {
49 if (const Argument *MA = dyn_cast<Argument>(V))
50 return MA->getParent() ? MA->getParent()->getParent() : 0;
51 else if (const BasicBlock *BB = dyn_cast<BasicBlock>(V))
52 return BB->getParent() ? BB->getParent()->getParent() : 0;
53 else if (const Instruction *I = dyn_cast<Instruction>(V)) {
54 const Function *M = I->getParent() ? I->getParent()->getParent() : 0;
55 return M ? M->getParent() : 0;
56 } else if (const GlobalValue *GV = dyn_cast<GlobalValue>(V))
57 return GV->getParent();
61 static SlotCalculator *createSlotCalculator(const Value *V) {
62 assert(!isa<Type>(V) && "Can't create an SC for a type!");
63 if (const Argument *FA = dyn_cast<Argument>(V)) {
64 return new SlotCalculator(FA->getParent(), false);
65 } else if (const Instruction *I = dyn_cast<Instruction>(V)) {
66 return new SlotCalculator(I->getParent()->getParent(), false);
67 } else if (const BasicBlock *BB = dyn_cast<BasicBlock>(V)) {
68 return new SlotCalculator(BB->getParent(), false);
69 } else if (const GlobalVariable *GV = dyn_cast<GlobalVariable>(V)){
70 return new SlotCalculator(GV->getParent(), false);
71 } else if (const Function *Func = dyn_cast<Function>(V)) {
72 return new SlotCalculator(Func, false);
77 // getLLVMName - Turn the specified string into an 'LLVM name', which is either
78 // prefixed with % (if the string only contains simple characters) or is
79 // surrounded with ""'s (if it has special chars in it).
80 static std::string getLLVMName(const std::string &Name) {
81 assert(!Name.empty() && "Cannot get empty name!");
83 // First character cannot start with a number...
84 if (Name[0] >= '0' && Name[0] <= '9')
85 return "\"" + Name + "\"";
87 // Scan to see if we have any characters that are not on the "white list"
88 for (unsigned i = 0, e = Name.size(); i != e; ++i) {
90 assert(C != '"' && "Illegal character in LLVM value name!");
91 if ((C < 'a' || C > 'z') && (C < 'A' || C > 'Z') && (C < '0' || C > '9') &&
92 C != '-' && C != '.' && C != '_')
93 return "\"" + Name + "\"";
96 // If we get here, then the identifier is legal to use as a "VarID".
101 /// fillTypeNameTable - If the module has a symbol table, take all global types
102 /// and stuff their names into the TypeNames map.
104 static void fillTypeNameTable(const Module *M,
105 std::map<const Type *, std::string> &TypeNames) {
107 const SymbolTable &ST = M->getSymbolTable();
108 SymbolTable::const_iterator PI = ST.find(Type::TypeTy);
109 if (PI != ST.end()) {
110 SymbolTable::type_const_iterator I = PI->second.begin();
111 for (; I != PI->second.end(); ++I) {
112 // As a heuristic, don't insert pointer to primitive types, because
113 // they are used too often to have a single useful name.
115 const Type *Ty = cast<Type>(I->second);
116 if (!isa<PointerType>(Ty) ||
117 !cast<PointerType>(Ty)->getElementType()->isPrimitiveType() ||
118 isa<OpaqueType>(cast<PointerType>(Ty)->getElementType()))
119 TypeNames.insert(std::make_pair(Ty, getLLVMName(I->first)));
126 static std::string calcTypeName(const Type *Ty,
127 std::vector<const Type *> &TypeStack,
128 std::map<const Type *, std::string> &TypeNames){
129 if (Ty->isPrimitiveType() && !isa<OpaqueType>(Ty))
130 return Ty->getDescription(); // Base case
132 // Check to see if the type is named.
133 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
134 if (I != TypeNames.end()) return I->second;
136 if (isa<OpaqueType>(Ty))
139 // Check to see if the Type is already on the stack...
140 unsigned Slot = 0, CurSize = TypeStack.size();
141 while (Slot < CurSize && TypeStack[Slot] != Ty) ++Slot; // Scan for type
143 // This is another base case for the recursion. In this case, we know
144 // that we have looped back to a type that we have previously visited.
145 // Generate the appropriate upreference to handle this.
147 return "\\" + utostr(CurSize-Slot); // Here's the upreference
149 TypeStack.push_back(Ty); // Recursive case: Add us to the stack..
152 switch (Ty->getPrimitiveID()) {
153 case Type::FunctionTyID: {
154 const FunctionType *FTy = cast<FunctionType>(Ty);
155 Result = calcTypeName(FTy->getReturnType(), TypeStack, TypeNames) + " (";
156 for (FunctionType::param_iterator I = FTy->param_begin(),
157 E = FTy->param_end(); I != E; ++I) {
158 if (I != FTy->param_begin())
160 Result += calcTypeName(*I, TypeStack, TypeNames);
162 if (FTy->isVarArg()) {
163 if (FTy->getNumParams()) Result += ", ";
169 case Type::StructTyID: {
170 const StructType *STy = cast<StructType>(Ty);
172 for (StructType::element_iterator I = STy->element_begin(),
173 E = STy->element_end(); I != E; ++I) {
174 if (I != STy->element_begin())
176 Result += calcTypeName(*I, TypeStack, TypeNames);
181 case Type::PointerTyID:
182 Result = calcTypeName(cast<PointerType>(Ty)->getElementType(),
183 TypeStack, TypeNames) + "*";
185 case Type::ArrayTyID: {
186 const ArrayType *ATy = cast<ArrayType>(Ty);
187 Result = "[" + utostr(ATy->getNumElements()) + " x ";
188 Result += calcTypeName(ATy->getElementType(), TypeStack, TypeNames) + "]";
191 case Type::OpaqueTyID:
195 Result = "<unrecognized-type>";
198 TypeStack.pop_back(); // Remove self from stack...
203 /// printTypeInt - The internal guts of printing out a type that has a
204 /// potentially named portion.
206 static std::ostream &printTypeInt(std::ostream &Out, const Type *Ty,
207 std::map<const Type *, std::string> &TypeNames) {
208 // Primitive types always print out their description, regardless of whether
209 // they have been named or not.
211 if (Ty->isPrimitiveType() && !isa<OpaqueType>(Ty))
212 return Out << Ty->getDescription();
214 // Check to see if the type is named.
215 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
216 if (I != TypeNames.end()) return Out << I->second;
218 // Otherwise we have a type that has not been named but is a derived type.
219 // Carefully recurse the type hierarchy to print out any contained symbolic
222 std::vector<const Type *> TypeStack;
223 std::string TypeName = calcTypeName(Ty, TypeStack, TypeNames);
224 TypeNames.insert(std::make_pair(Ty, TypeName));//Cache type name for later use
225 return Out << TypeName;
229 /// WriteTypeSymbolic - This attempts to write the specified type as a symbolic
230 /// type, iff there is an entry in the modules symbol table for the specified
231 /// type or one of it's component types. This is slower than a simple x << Type
233 std::ostream &llvm::WriteTypeSymbolic(std::ostream &Out, const Type *Ty,
237 // If they want us to print out a type, attempt to make it symbolic if there
238 // is a symbol table in the module...
240 std::map<const Type *, std::string> TypeNames;
241 fillTypeNameTable(M, TypeNames);
243 return printTypeInt(Out, Ty, TypeNames);
245 return Out << Ty->getDescription();
249 static void WriteConstantInt(std::ostream &Out, const Constant *CV,
251 std::map<const Type *, std::string> &TypeTable,
252 SlotCalculator *Table) {
253 if (const ConstantBool *CB = dyn_cast<ConstantBool>(CV)) {
254 Out << (CB == ConstantBool::True ? "true" : "false");
255 } else if (const ConstantSInt *CI = dyn_cast<ConstantSInt>(CV)) {
256 Out << CI->getValue();
257 } else if (const ConstantUInt *CI = dyn_cast<ConstantUInt>(CV)) {
258 Out << CI->getValue();
259 } else if (const ConstantFP *CFP = dyn_cast<ConstantFP>(CV)) {
260 // We would like to output the FP constant value in exponential notation,
261 // but we cannot do this if doing so will lose precision. Check here to
262 // make sure that we only output it in exponential format if we can parse
263 // the value back and get the same value.
265 std::string StrVal = ftostr(CFP->getValue());
267 // Check to make sure that the stringized number is not some string like
268 // "Inf" or NaN, that atof will accept, but the lexer will not. Check that
269 // the string matches the "[-+]?[0-9]" regex.
271 if ((StrVal[0] >= '0' && StrVal[0] <= '9') ||
272 ((StrVal[0] == '-' || StrVal[0] == '+') &&
273 (StrVal[1] >= '0' && StrVal[1] <= '9')))
274 // Reparse stringized version!
275 if (atof(StrVal.c_str()) == CFP->getValue()) {
276 Out << StrVal; return;
279 // Otherwise we could not reparse it to exactly the same value, so we must
280 // output the string in hexadecimal format!
282 // Behave nicely in the face of C TBAA rules... see:
283 // http://www.nullstone.com/htmls/category/aliastyp.htm
285 double Val = CFP->getValue();
286 char *Ptr = (char*)&Val;
287 assert(sizeof(double) == sizeof(uint64_t) && sizeof(double) == 8 &&
288 "assuming that double is 64 bits!");
289 Out << "0x" << utohexstr(*(uint64_t*)Ptr);
291 } else if (isa<ConstantAggregateZero>(CV)) {
292 Out << "zeroinitializer";
293 } else if (const ConstantArray *CA = dyn_cast<ConstantArray>(CV)) {
294 // As a special case, print the array as a string if it is an array of
295 // ubytes or an array of sbytes with positive values.
297 const Type *ETy = CA->getType()->getElementType();
298 bool isString = (ETy == Type::SByteTy || ETy == Type::UByteTy);
300 if (ETy == Type::SByteTy)
301 for (unsigned i = 0; i < CA->getNumOperands(); ++i)
302 if (cast<ConstantSInt>(CA->getOperand(i))->getValue() < 0) {
309 for (unsigned i = 0; i < CA->getNumOperands(); ++i) {
310 unsigned char C = cast<ConstantInt>(CA->getOperand(i))->getRawValue();
312 if (isprint(C) && C != '"' && C != '\\') {
316 << (char) ((C/16 < 10) ? ( C/16 +'0') : ( C/16 -10+'A'))
317 << (char)(((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A'));
322 } else { // Cannot output in string format...
324 if (CA->getNumOperands()) {
326 printTypeInt(Out, ETy, TypeTable);
327 WriteAsOperandInternal(Out, CA->getOperand(0),
328 PrintName, TypeTable, Table);
329 for (unsigned i = 1, e = CA->getNumOperands(); i != e; ++i) {
331 printTypeInt(Out, ETy, TypeTable);
332 WriteAsOperandInternal(Out, CA->getOperand(i), PrintName,
338 } else if (const ConstantStruct *CS = dyn_cast<ConstantStruct>(CV)) {
340 if (CS->getNumOperands()) {
342 printTypeInt(Out, CS->getOperand(0)->getType(), TypeTable);
344 WriteAsOperandInternal(Out, CS->getOperand(0),
345 PrintName, TypeTable, Table);
347 for (unsigned i = 1; i < CS->getNumOperands(); i++) {
349 printTypeInt(Out, CS->getOperand(i)->getType(), TypeTable);
351 WriteAsOperandInternal(Out, CS->getOperand(i),
352 PrintName, TypeTable, Table);
357 } else if (isa<ConstantPointerNull>(CV)) {
360 } else if (const ConstantPointerRef *PR = dyn_cast<ConstantPointerRef>(CV)) {
361 WriteAsOperandInternal(Out, PR->getValue(), true, TypeTable, Table);
363 } else if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CV)) {
364 Out << CE->getOpcodeName() << " (";
366 for (User::const_op_iterator OI=CE->op_begin(); OI != CE->op_end(); ++OI) {
367 printTypeInt(Out, (*OI)->getType(), TypeTable);
368 WriteAsOperandInternal(Out, *OI, PrintName, TypeTable, Table);
369 if (OI+1 != CE->op_end())
373 if (CE->getOpcode() == Instruction::Cast) {
375 printTypeInt(Out, CE->getType(), TypeTable);
380 Out << "<placeholder or erroneous Constant>";
385 /// WriteAsOperand - Write the name of the specified value out to the specified
386 /// ostream. This can be useful when you just want to print int %reg126, not
387 /// the whole instruction that generated it.
389 static void WriteAsOperandInternal(std::ostream &Out, const Value *V,
391 std::map<const Type*, std::string> &TypeTable,
392 SlotCalculator *Table) {
394 if (PrintName && V->hasName()) {
395 Out << getLLVMName(V->getName());
397 if (const Constant *CV = dyn_cast<Constant>(V)) {
398 WriteConstantInt(Out, CV, PrintName, TypeTable, Table);
402 Slot = Table->getSlot(V);
404 if (const Type *Ty = dyn_cast<Type>(V)) {
405 Out << Ty->getDescription();
409 Table = createSlotCalculator(V);
410 if (Table == 0) { Out << "BAD VALUE TYPE!"; return; }
412 Slot = Table->getSlot(V);
415 if (Slot >= 0) Out << "%" << Slot;
418 Out << "<badref: " << getLLVMName(V->getName()) << ">";
420 Out << "<badref>"; // Not embedded into a location?
426 /// WriteAsOperand - Write the name of the specified value out to the specified
427 /// ostream. This can be useful when you just want to print int %reg126, not
428 /// the whole instruction that generated it.
430 std::ostream &llvm::WriteAsOperand(std::ostream &Out, const Value *V,
431 bool PrintType, bool PrintName,
432 const Module *Context) {
433 std::map<const Type *, std::string> TypeNames;
434 if (Context == 0) Context = getModuleFromVal(V);
437 fillTypeNameTable(Context, TypeNames);
440 printTypeInt(Out, V->getType(), TypeNames);
442 if (const Type *Ty = dyn_cast<Type> (V))
443 printTypeInt(Out, Ty, TypeNames);
445 WriteAsOperandInternal(Out, V, PrintName, TypeNames, 0);
451 class AssemblyWriter {
453 SlotCalculator &Table;
454 const Module *TheModule;
455 std::map<const Type *, std::string> TypeNames;
456 AssemblyAnnotationWriter *AnnotationWriter;
458 inline AssemblyWriter(std::ostream &o, SlotCalculator &Tab, const Module *M,
459 AssemblyAnnotationWriter *AAW)
460 : Out(&o), Table(Tab), TheModule(M), AnnotationWriter(AAW) {
462 // If the module has a symbol table, take all global types and stuff their
463 // names into the TypeNames map.
465 fillTypeNameTable(M, TypeNames);
468 inline void write(const Module *M) { printModule(M); }
469 inline void write(const GlobalVariable *G) { printGlobal(G); }
470 inline void write(const Function *F) { printFunction(F); }
471 inline void write(const BasicBlock *BB) { printBasicBlock(BB); }
472 inline void write(const Instruction *I) { printInstruction(*I); }
473 inline void write(const Constant *CPV) { printConstant(CPV); }
474 inline void write(const Type *Ty) { printType(Ty); }
476 void writeOperand(const Value *Op, bool PrintType, bool PrintName = true);
478 const Module* getModule() { return TheModule; }
479 void setStream(std::ostream &os) { Out = &os; }
482 void printModule(const Module *M);
483 void printSymbolTable(const SymbolTable &ST);
484 void printConstant(const Constant *CPV);
485 void printGlobal(const GlobalVariable *GV);
486 void printFunction(const Function *F);
487 void printArgument(const Argument *FA);
488 void printBasicBlock(const BasicBlock *BB);
489 void printInstruction(const Instruction &I);
491 // printType - Go to extreme measures to attempt to print out a short,
492 // symbolic version of a type name.
494 std::ostream &printType(const Type *Ty) {
495 return printTypeInt(*Out, Ty, TypeNames);
498 // printTypeAtLeastOneLevel - Print out one level of the possibly complex type
499 // without considering any symbolic types that we may have equal to it.
501 std::ostream &printTypeAtLeastOneLevel(const Type *Ty);
503 // printInfoComment - Print a little comment after the instruction indicating
504 // which slot it occupies.
505 void printInfoComment(const Value &V);
507 } // end of anonymous namespace
509 /// printTypeAtLeastOneLevel - Print out one level of the possibly complex type
510 /// without considering any symbolic types that we may have equal to it.
512 std::ostream &AssemblyWriter::printTypeAtLeastOneLevel(const Type *Ty) {
513 if (const FunctionType *FTy = dyn_cast<FunctionType>(Ty)) {
514 printType(FTy->getReturnType()) << " (";
515 for (FunctionType::param_iterator I = FTy->param_begin(),
516 E = FTy->param_end(); I != E; ++I) {
517 if (I != FTy->param_begin())
521 if (FTy->isVarArg()) {
522 if (FTy->getNumParams()) *Out << ", ";
526 } else if (const StructType *STy = dyn_cast<StructType>(Ty)) {
528 for (StructType::element_iterator I = STy->element_begin(),
529 E = STy->element_end(); I != E; ++I) {
530 if (I != STy->element_begin())
535 } else if (const PointerType *PTy = dyn_cast<PointerType>(Ty)) {
536 printType(PTy->getElementType()) << "*";
537 } else if (const ArrayType *ATy = dyn_cast<ArrayType>(Ty)) {
538 *Out << "[" << ATy->getNumElements() << " x ";
539 printType(ATy->getElementType()) << "]";
540 } else if (const OpaqueType *OTy = dyn_cast<OpaqueType>(Ty)) {
543 if (!Ty->isPrimitiveType())
544 *Out << "<unknown derived type>";
551 void AssemblyWriter::writeOperand(const Value *Operand, bool PrintType,
553 if (PrintType) { *Out << " "; printType(Operand->getType()); }
554 WriteAsOperandInternal(*Out, Operand, PrintName, TypeNames, &Table);
558 void AssemblyWriter::printModule(const Module *M) {
559 switch (M->getEndianness()) {
560 case Module::LittleEndian: *Out << "target endian = little\n"; break;
561 case Module::BigEndian: *Out << "target endian = big\n"; break;
562 case Module::AnyEndianness: break;
564 switch (M->getPointerSize()) {
565 case Module::Pointer32: *Out << "target pointersize = 32\n"; break;
566 case Module::Pointer64: *Out << "target pointersize = 64\n"; break;
567 case Module::AnyPointerSize: break;
570 // Loop over the symbol table, emitting all named constants...
571 printSymbolTable(M->getSymbolTable());
573 for (Module::const_giterator I = M->gbegin(), E = M->gend(); I != E; ++I)
576 *Out << "\nimplementation ; Functions:\n";
578 // Output all of the functions...
579 for (Module::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
583 void AssemblyWriter::printGlobal(const GlobalVariable *GV) {
584 if (GV->hasName()) *Out << getLLVMName(GV->getName()) << " = ";
586 if (!GV->hasInitializer())
589 switch (GV->getLinkage()) {
590 case GlobalValue::InternalLinkage: *Out << "internal "; break;
591 case GlobalValue::LinkOnceLinkage: *Out << "linkonce "; break;
592 case GlobalValue::WeakLinkage: *Out << "weak "; break;
593 case GlobalValue::AppendingLinkage: *Out << "appending "; break;
594 case GlobalValue::ExternalLinkage: break;
597 *Out << (GV->isConstant() ? "constant " : "global ");
598 printType(GV->getType()->getElementType());
600 if (GV->hasInitializer())
601 writeOperand(GV->getInitializer(), false, false);
603 printInfoComment(*GV);
608 /// printSymbolTable - Run through symbol table looking for named constants
609 /// if a named constant is found, emit it's declaration...
611 void AssemblyWriter::printSymbolTable(const SymbolTable &ST) {
612 for (SymbolTable::const_iterator TI = ST.begin(); TI != ST.end(); ++TI) {
613 SymbolTable::type_const_iterator I = ST.type_begin(TI->first);
614 SymbolTable::type_const_iterator End = ST.type_end(TI->first);
616 for (; I != End; ++I) {
617 const Value *V = I->second;
618 if (const Constant *CPV = dyn_cast<Constant>(V)) {
620 } else if (const Type *Ty = dyn_cast<Type>(V)) {
621 assert(Ty->getType() == Type::TypeTy && TI->first == Type::TypeTy);
622 *Out << "\t" << getLLVMName(I->first) << " = type ";
624 // Make sure we print out at least one level of the type structure, so
625 // that we do not get %FILE = type %FILE
627 printTypeAtLeastOneLevel(Ty) << "\n";
634 /// printConstant - Print out a constant pool entry...
636 void AssemblyWriter::printConstant(const Constant *CPV) {
637 // Don't print out unnamed constants, they will be inlined
638 if (!CPV->hasName()) return;
641 *Out << "\t" << getLLVMName(CPV->getName()) << " =";
643 // Write the value out now...
644 writeOperand(CPV, true, false);
646 printInfoComment(*CPV);
650 /// printFunction - Print all aspects of a function.
652 void AssemblyWriter::printFunction(const Function *F) {
653 // Print out the return type and name...
656 if (AnnotationWriter) AnnotationWriter->emitFunctionAnnot(F, *Out);
661 switch (F->getLinkage()) {
662 case GlobalValue::InternalLinkage: *Out << "internal "; break;
663 case GlobalValue::LinkOnceLinkage: *Out << "linkonce "; break;
664 case GlobalValue::WeakLinkage: *Out << "weak "; break;
665 case GlobalValue::AppendingLinkage: *Out << "appending "; break;
666 case GlobalValue::ExternalLinkage: break;
669 printType(F->getReturnType()) << " ";
670 if (!F->getName().empty())
671 *Out << getLLVMName(F->getName());
675 Table.incorporateFunction(F);
677 // Loop over the arguments, printing them...
678 const FunctionType *FT = F->getFunctionType();
680 for(Function::const_aiterator I = F->abegin(), E = F->aend(); I != E; ++I)
683 // Finish printing arguments...
684 if (FT->isVarArg()) {
685 if (FT->getNumParams()) *Out << ", ";
686 *Out << "..."; // Output varargs portion of signature!
690 if (F->isExternal()) {
695 // Output all of its basic blocks... for the function
696 for (Function::const_iterator I = F->begin(), E = F->end(); I != E; ++I)
702 Table.purgeFunction();
705 /// printArgument - This member is called for every argument that is passed into
706 /// the function. Simply print it out
708 void AssemblyWriter::printArgument(const Argument *Arg) {
709 // Insert commas as we go... the first arg doesn't get a comma
710 if (Arg != &Arg->getParent()->afront()) *Out << ", ";
713 printType(Arg->getType());
715 // Output name, if available...
717 *Out << " " << getLLVMName(Arg->getName());
718 else if (Table.getSlot(Arg) < 0)
722 /// printBasicBlock - This member is called for each basic block in a method.
724 void AssemblyWriter::printBasicBlock(const BasicBlock *BB) {
725 if (BB->hasName()) { // Print out the label if it exists...
726 *Out << "\n" << BB->getName() << ":";
727 } else if (!BB->use_empty()) { // Don't print block # of no uses...
728 int Slot = Table.getSlot(BB);
729 *Out << "\n; <label>:";
731 *Out << Slot; // Extra newline separates out label's
736 if (BB->getParent() == 0)
737 *Out << "\t\t; Error: Block without parent!";
739 if (BB != &BB->getParent()->front()) { // Not the entry block?
740 // Output predecessors for the block...
742 pred_const_iterator PI = pred_begin(BB), PE = pred_end(BB);
745 *Out << " No predecessors!";
748 writeOperand(*PI, false, true);
749 for (++PI; PI != PE; ++PI) {
751 writeOperand(*PI, false, true);
759 if (AnnotationWriter) AnnotationWriter->emitBasicBlockStartAnnot(BB, *Out);
761 // Output all of the instructions in the basic block...
762 for (BasicBlock::const_iterator I = BB->begin(), E = BB->end(); I != E; ++I)
763 printInstruction(*I);
765 if (AnnotationWriter) AnnotationWriter->emitBasicBlockEndAnnot(BB, *Out);
769 /// printInfoComment - Print a little comment after the instruction indicating
770 /// which slot it occupies.
772 void AssemblyWriter::printInfoComment(const Value &V) {
773 if (V.getType() != Type::VoidTy) {
775 printType(V.getType()) << ">";
778 int Slot = Table.getSlot(&V); // Print out the def slot taken...
779 if (Slot >= 0) *Out << ":" << Slot;
780 else *Out << ":<badref>";
782 *Out << " [#uses=" << V.use_size() << "]"; // Output # uses
786 /// printInstruction - This member is called for each Instruction in a method.
788 void AssemblyWriter::printInstruction(const Instruction &I) {
789 if (AnnotationWriter) AnnotationWriter->emitInstructionAnnot(&I, *Out);
793 // Print out name if it exists...
795 *Out << getLLVMName(I.getName()) << " = ";
797 // If this is a volatile load or store, print out the volatile marker
798 if ((isa<LoadInst>(I) && cast<LoadInst>(I).isVolatile()) ||
799 (isa<StoreInst>(I) && cast<StoreInst>(I).isVolatile()))
802 // Print out the opcode...
803 *Out << I.getOpcodeName();
805 // Print out the type of the operands...
806 const Value *Operand = I.getNumOperands() ? I.getOperand(0) : 0;
808 // Special case conditional branches to swizzle the condition out to the front
809 if (isa<BranchInst>(I) && I.getNumOperands() > 1) {
810 writeOperand(I.getOperand(2), true);
812 writeOperand(Operand, true);
814 writeOperand(I.getOperand(1), true);
816 } else if (isa<SwitchInst>(I)) {
817 // Special case switch statement to get formatting nice and correct...
818 writeOperand(Operand , true); *Out << ",";
819 writeOperand(I.getOperand(1), true); *Out << " [";
821 for (unsigned op = 2, Eop = I.getNumOperands(); op < Eop; op += 2) {
823 writeOperand(I.getOperand(op ), true); *Out << ",";
824 writeOperand(I.getOperand(op+1), true);
827 } else if (isa<PHINode>(I)) {
829 printType(I.getType());
832 for (unsigned op = 0, Eop = I.getNumOperands(); op < Eop; op += 2) {
833 if (op) *Out << ", ";
835 writeOperand(I.getOperand(op ), false); *Out << ",";
836 writeOperand(I.getOperand(op+1), false); *Out << " ]";
838 } else if (isa<ReturnInst>(I) && !Operand) {
840 } else if (isa<CallInst>(I)) {
841 const PointerType *PTy = cast<PointerType>(Operand->getType());
842 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
843 const Type *RetTy = FTy->getReturnType();
845 // If possible, print out the short form of the call instruction. We can
846 // only do this if the first argument is a pointer to a nonvararg function,
847 // and if the return type is not a pointer to a function.
849 if (!FTy->isVarArg() &&
850 (!isa<PointerType>(RetTy) ||
851 !isa<FunctionType>(cast<PointerType>(RetTy)->getElementType()))) {
852 *Out << " "; printType(RetTy);
853 writeOperand(Operand, false);
855 writeOperand(Operand, true);
858 if (I.getNumOperands() > 1) writeOperand(I.getOperand(1), true);
859 for (unsigned op = 2, Eop = I.getNumOperands(); op < Eop; ++op) {
861 writeOperand(I.getOperand(op), true);
865 } else if (const InvokeInst *II = dyn_cast<InvokeInst>(&I)) {
866 const PointerType *PTy = cast<PointerType>(Operand->getType());
867 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
868 const Type *RetTy = FTy->getReturnType();
870 // If possible, print out the short form of the invoke instruction. We can
871 // only do this if the first argument is a pointer to a nonvararg function,
872 // and if the return type is not a pointer to a function.
874 if (!FTy->isVarArg() &&
875 (!isa<PointerType>(RetTy) ||
876 !isa<FunctionType>(cast<PointerType>(RetTy)->getElementType()))) {
877 *Out << " "; printType(RetTy);
878 writeOperand(Operand, false);
880 writeOperand(Operand, true);
884 if (I.getNumOperands() > 3) writeOperand(I.getOperand(3), true);
885 for (unsigned op = 4, Eop = I.getNumOperands(); op < Eop; ++op) {
887 writeOperand(I.getOperand(op), true);
890 *Out << " )\n\t\t\tto";
891 writeOperand(II->getNormalDest(), true);
893 writeOperand(II->getUnwindDest(), true);
895 } else if (const AllocationInst *AI = dyn_cast<AllocationInst>(&I)) {
897 printType(AI->getType()->getElementType());
898 if (AI->isArrayAllocation()) {
900 writeOperand(AI->getArraySize(), true);
902 } else if (isa<CastInst>(I)) {
903 if (Operand) writeOperand(Operand, true); // Work with broken code
905 printType(I.getType());
906 } else if (isa<VAArgInst>(I)) {
907 if (Operand) writeOperand(Operand, true); // Work with broken code
909 printType(I.getType());
910 } else if (const VANextInst *VAN = dyn_cast<VANextInst>(&I)) {
911 if (Operand) writeOperand(Operand, true); // Work with broken code
913 printType(VAN->getArgType());
914 } else if (Operand) { // Print the normal way...
916 // PrintAllTypes - Instructions who have operands of all the same type
917 // omit the type from all but the first operand. If the instruction has
918 // different type operands (for example br), then they are all printed.
919 bool PrintAllTypes = false;
920 const Type *TheType = Operand->getType();
922 // Shift Left & Right print both types even for Ubyte LHS, and select prints
923 // types even if all operands are bools.
924 if (isa<ShiftInst>(I) || isa<SelectInst>(I)) {
925 PrintAllTypes = true;
927 for (unsigned i = 1, E = I.getNumOperands(); i != E; ++i) {
928 Operand = I.getOperand(i);
929 if (Operand->getType() != TheType) {
930 PrintAllTypes = true; // We have differing types! Print them all!
936 if (!PrintAllTypes) {
941 for (unsigned i = 0, E = I.getNumOperands(); i != E; ++i) {
943 writeOperand(I.getOperand(i), PrintAllTypes);
952 //===----------------------------------------------------------------------===//
953 // External Interface declarations
954 //===----------------------------------------------------------------------===//
956 void Module::print(std::ostream &o, AssemblyAnnotationWriter *AAW) const {
957 SlotCalculator SlotTable(this, false);
958 AssemblyWriter W(o, SlotTable, this, AAW);
962 void GlobalVariable::print(std::ostream &o) const {
963 SlotCalculator SlotTable(getParent(), false);
964 AssemblyWriter W(o, SlotTable, getParent(), 0);
968 void Function::print(std::ostream &o, AssemblyAnnotationWriter *AAW) const {
969 SlotCalculator SlotTable(getParent(), false);
970 AssemblyWriter W(o, SlotTable, getParent(), AAW);
975 void BasicBlock::print(std::ostream &o, AssemblyAnnotationWriter *AAW) const {
976 SlotCalculator SlotTable(getParent(), false);
977 AssemblyWriter W(o, SlotTable,
978 getParent() ? getParent()->getParent() : 0, AAW);
982 void Instruction::print(std::ostream &o, AssemblyAnnotationWriter *AAW) const {
983 const Function *F = getParent() ? getParent()->getParent() : 0;
984 SlotCalculator SlotTable(F, false);
985 AssemblyWriter W(o, SlotTable, F ? F->getParent() : 0, AAW);
990 void Constant::print(std::ostream &o) const {
991 if (this == 0) { o << "<null> constant value\n"; return; }
993 // Handle CPR's special, because they have context information...
994 if (const ConstantPointerRef *CPR = dyn_cast<ConstantPointerRef>(this)) {
995 CPR->getValue()->print(o); // Print as a global value, with context info.
999 o << " " << getType()->getDescription() << " ";
1001 std::map<const Type *, std::string> TypeTable;
1002 WriteConstantInt(o, this, false, TypeTable, 0);
1005 void Type::print(std::ostream &o) const {
1009 o << getDescription();
1012 void Argument::print(std::ostream &o) const {
1013 o << getType() << " " << getName();
1016 void Value::dump() const { print(std::cerr); }
1018 //===----------------------------------------------------------------------===//
1019 // CachedWriter Class Implementation
1020 //===----------------------------------------------------------------------===//
1022 void CachedWriter::setModule(const Module *M) {
1023 delete SC; delete AW;
1025 SC = new SlotCalculator(M, false);
1026 AW = new AssemblyWriter(*Out, *SC, M, 0);
1032 CachedWriter::~CachedWriter() {
1037 CachedWriter &CachedWriter::operator<<(const Value *V) {
1038 assert(AW && SC && "CachedWriter does not have a current module!");
1039 switch (V->getValueType()) {
1040 case Value::ConstantVal:
1041 case Value::ArgumentVal: AW->writeOperand(V, true, true); break;
1042 case Value::TypeVal: AW->write(cast<Type>(V)); break;
1043 case Value::InstructionVal: AW->write(cast<Instruction>(V)); break;
1044 case Value::BasicBlockVal: AW->write(cast<BasicBlock>(V)); break;
1045 case Value::FunctionVal: AW->write(cast<Function>(V)); break;
1046 case Value::GlobalVariableVal: AW->write(cast<GlobalVariable>(V)); break;
1047 default: *Out << "<unknown value type: " << V->getValueType() << ">"; break;
1052 CachedWriter& CachedWriter::operator<<(const Type *X) {
1053 if (SymbolicTypes) {
1054 const Module *M = AW->getModule();
1055 if (M) WriteTypeSymbolic(*Out, X, M);
1058 return *this << (const Value*)X;
1061 void CachedWriter::setStream(std::ostream &os) {
1063 if (AW) AW->setStream(os);