1 //===-- CBackend.cpp - Library for converting LLVM code to C --------------===//
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 library converts LLVM code to C code, compilable by GCC and other C
13 //===----------------------------------------------------------------------===//
15 #include "CTargetMachine.h"
16 #include "llvm/CallingConv.h"
17 #include "llvm/Constants.h"
18 #include "llvm/DerivedTypes.h"
19 #include "llvm/Module.h"
20 #include "llvm/Instructions.h"
21 #include "llvm/Pass.h"
22 #include "llvm/PassManager.h"
23 #include "llvm/TypeSymbolTable.h"
24 #include "llvm/Intrinsics.h"
25 #include "llvm/IntrinsicInst.h"
26 #include "llvm/InlineAsm.h"
27 #include "llvm/ADT/StringExtras.h"
28 #include "llvm/ADT/STLExtras.h"
29 #include "llvm/Analysis/ConstantsScanner.h"
30 #include "llvm/Analysis/FindUsedTypes.h"
31 #include "llvm/Analysis/LoopInfo.h"
32 #include "llvm/Analysis/ValueTracking.h"
33 #include "llvm/CodeGen/Passes.h"
34 #include "llvm/CodeGen/IntrinsicLowering.h"
35 #include "llvm/Transforms/Scalar.h"
36 #include "llvm/MC/MCAsmInfo.h"
37 #include "llvm/Target/TargetData.h"
38 #include "llvm/Target/TargetRegistry.h"
39 #include "llvm/Support/CallSite.h"
40 #include "llvm/Support/CFG.h"
41 #include "llvm/Support/ErrorHandling.h"
42 #include "llvm/Support/FormattedStream.h"
43 #include "llvm/Support/GetElementPtrTypeIterator.h"
44 #include "llvm/Support/InstVisitor.h"
45 #include "llvm/Support/Mangler.h"
46 #include "llvm/Support/MathExtras.h"
47 #include "llvm/System/Host.h"
48 #include "llvm/Config/config.h"
53 extern "C" void LLVMInitializeCBackendTarget() {
54 // Register the target.
55 RegisterTargetMachine<CTargetMachine> X(TheCBackendTarget);
59 /// CBackendNameAllUsedStructsAndMergeFunctions - This pass inserts names for
60 /// any unnamed structure types that are used by the program, and merges
61 /// external functions with the same name.
63 class CBackendNameAllUsedStructsAndMergeFunctions : public ModulePass {
66 CBackendNameAllUsedStructsAndMergeFunctions()
68 void getAnalysisUsage(AnalysisUsage &AU) const {
69 AU.addRequired<FindUsedTypes>();
72 virtual const char *getPassName() const {
73 return "C backend type canonicalizer";
76 virtual bool runOnModule(Module &M);
79 char CBackendNameAllUsedStructsAndMergeFunctions::ID = 0;
81 /// CWriter - This class is the main chunk of code that converts an LLVM
82 /// module to a C translation unit.
83 class CWriter : public FunctionPass, public InstVisitor<CWriter> {
84 formatted_raw_ostream &Out;
85 IntrinsicLowering *IL;
88 const Module *TheModule;
89 const MCAsmInfo* TAsm;
91 std::map<const Type *, std::string> TypeNames;
92 std::map<const ConstantFP *, unsigned> FPConstantMap;
93 std::set<Function*> intrinsicPrototypesAlreadyGenerated;
94 std::set<const Argument*> ByValParams;
96 unsigned OpaqueCounter;
97 DenseMap<const Value*, unsigned> AnonValueNumbers;
98 unsigned NextAnonValueNumber;
102 explicit CWriter(formatted_raw_ostream &o)
103 : FunctionPass(&ID), Out(o), IL(0), Mang(0), LI(0),
104 TheModule(0), TAsm(0), TD(0), OpaqueCounter(0), NextAnonValueNumber(0) {
108 virtual const char *getPassName() const { return "C backend"; }
110 void getAnalysisUsage(AnalysisUsage &AU) const {
111 AU.addRequired<LoopInfo>();
112 AU.setPreservesAll();
115 virtual bool doInitialization(Module &M);
117 bool runOnFunction(Function &F) {
118 // Do not codegen any 'available_externally' functions at all, they have
119 // definitions outside the translation unit.
120 if (F.hasAvailableExternallyLinkage())
123 LI = &getAnalysis<LoopInfo>();
125 // Get rid of intrinsics we can't handle.
128 // Output all floating point constants that cannot be printed accurately.
129 printFloatingPointConstants(F);
135 virtual bool doFinalization(Module &M) {
140 FPConstantMap.clear();
143 intrinsicPrototypesAlreadyGenerated.clear();
147 raw_ostream &printType(formatted_raw_ostream &Out,
149 bool isSigned = false,
150 const std::string &VariableName = "",
151 bool IgnoreName = false,
152 const AttrListPtr &PAL = AttrListPtr());
153 std::ostream &printType(std::ostream &Out, const Type *Ty,
154 bool isSigned = false,
155 const std::string &VariableName = "",
156 bool IgnoreName = false,
157 const AttrListPtr &PAL = AttrListPtr());
158 raw_ostream &printSimpleType(formatted_raw_ostream &Out,
161 const std::string &NameSoFar = "");
162 std::ostream &printSimpleType(std::ostream &Out, const Type *Ty,
164 const std::string &NameSoFar = "");
166 void printStructReturnPointerFunctionType(formatted_raw_ostream &Out,
167 const AttrListPtr &PAL,
168 const PointerType *Ty);
170 /// writeOperandDeref - Print the result of dereferencing the specified
171 /// operand with '*'. This is equivalent to printing '*' then using
172 /// writeOperand, but avoids excess syntax in some cases.
173 void writeOperandDeref(Value *Operand) {
174 if (isAddressExposed(Operand)) {
175 // Already something with an address exposed.
176 writeOperandInternal(Operand);
179 writeOperand(Operand);
184 void writeOperand(Value *Operand, bool Static = false);
185 void writeInstComputationInline(Instruction &I);
186 void writeOperandInternal(Value *Operand, bool Static = false);
187 void writeOperandWithCast(Value* Operand, unsigned Opcode);
188 void writeOperandWithCast(Value* Operand, const ICmpInst &I);
189 bool writeInstructionCast(const Instruction &I);
191 void writeMemoryAccess(Value *Operand, const Type *OperandType,
192 bool IsVolatile, unsigned Alignment);
195 std::string InterpretASMConstraint(InlineAsm::ConstraintInfo& c);
197 void lowerIntrinsics(Function &F);
199 void printModule(Module *M);
200 void printModuleTypes(const TypeSymbolTable &ST);
201 void printContainedStructs(const Type *Ty, std::set<const Type *> &);
202 void printFloatingPointConstants(Function &F);
203 void printFloatingPointConstants(const Constant *C);
204 void printFunctionSignature(const Function *F, bool Prototype);
206 void printFunction(Function &);
207 void printBasicBlock(BasicBlock *BB);
208 void printLoop(Loop *L);
210 void printCast(unsigned opcode, const Type *SrcTy, const Type *DstTy);
211 void printConstant(Constant *CPV, bool Static);
212 void printConstantWithCast(Constant *CPV, unsigned Opcode);
213 bool printConstExprCast(const ConstantExpr *CE, bool Static);
214 void printConstantArray(ConstantArray *CPA, bool Static);
215 void printConstantVector(ConstantVector *CV, bool Static);
217 /// isAddressExposed - Return true if the specified value's name needs to
218 /// have its address taken in order to get a C value of the correct type.
219 /// This happens for global variables, byval parameters, and direct allocas.
220 bool isAddressExposed(const Value *V) const {
221 if (const Argument *A = dyn_cast<Argument>(V))
222 return ByValParams.count(A);
223 return isa<GlobalVariable>(V) || isDirectAlloca(V);
226 // isInlinableInst - Attempt to inline instructions into their uses to build
227 // trees as much as possible. To do this, we have to consistently decide
228 // what is acceptable to inline, so that variable declarations don't get
229 // printed and an extra copy of the expr is not emitted.
231 static bool isInlinableInst(const Instruction &I) {
232 // Always inline cmp instructions, even if they are shared by multiple
233 // expressions. GCC generates horrible code if we don't.
237 // Must be an expression, must be used exactly once. If it is dead, we
238 // emit it inline where it would go.
239 if (I.getType() == Type::getVoidTy(I.getContext()) || !I.hasOneUse() ||
240 isa<TerminatorInst>(I) || isa<CallInst>(I) || isa<PHINode>(I) ||
241 isa<LoadInst>(I) || isa<VAArgInst>(I) || isa<InsertElementInst>(I) ||
242 isa<InsertValueInst>(I))
243 // Don't inline a load across a store or other bad things!
246 // Must not be used in inline asm, extractelement, or shufflevector.
248 const Instruction &User = cast<Instruction>(*I.use_back());
249 if (isInlineAsm(User) || isa<ExtractElementInst>(User) ||
250 isa<ShuffleVectorInst>(User))
254 // Only inline instruction it if it's use is in the same BB as the inst.
255 return I.getParent() == cast<Instruction>(I.use_back())->getParent();
258 // isDirectAlloca - Define fixed sized allocas in the entry block as direct
259 // variables which are accessed with the & operator. This causes GCC to
260 // generate significantly better code than to emit alloca calls directly.
262 static const AllocaInst *isDirectAlloca(const Value *V) {
263 const AllocaInst *AI = dyn_cast<AllocaInst>(V);
264 if (!AI) return false;
265 if (AI->isArrayAllocation())
266 return 0; // FIXME: we can also inline fixed size array allocas!
267 if (AI->getParent() != &AI->getParent()->getParent()->getEntryBlock())
272 // isInlineAsm - Check if the instruction is a call to an inline asm chunk
273 static bool isInlineAsm(const Instruction& I) {
274 if (isa<CallInst>(&I) && isa<InlineAsm>(I.getOperand(0)))
279 // Instruction visitation functions
280 friend class InstVisitor<CWriter>;
282 void visitReturnInst(ReturnInst &I);
283 void visitBranchInst(BranchInst &I);
284 void visitSwitchInst(SwitchInst &I);
285 void visitInvokeInst(InvokeInst &I) {
286 llvm_unreachable("Lowerinvoke pass didn't work!");
289 void visitUnwindInst(UnwindInst &I) {
290 llvm_unreachable("Lowerinvoke pass didn't work!");
292 void visitUnreachableInst(UnreachableInst &I);
294 void visitPHINode(PHINode &I);
295 void visitBinaryOperator(Instruction &I);
296 void visitICmpInst(ICmpInst &I);
297 void visitFCmpInst(FCmpInst &I);
299 void visitCastInst (CastInst &I);
300 void visitSelectInst(SelectInst &I);
301 void visitCallInst (CallInst &I);
302 void visitInlineAsm(CallInst &I);
303 bool visitBuiltinCall(CallInst &I, Intrinsic::ID ID, bool &WroteCallee);
305 void visitAllocaInst(AllocaInst &I);
306 void visitLoadInst (LoadInst &I);
307 void visitStoreInst (StoreInst &I);
308 void visitGetElementPtrInst(GetElementPtrInst &I);
309 void visitVAArgInst (VAArgInst &I);
311 void visitInsertElementInst(InsertElementInst &I);
312 void visitExtractElementInst(ExtractElementInst &I);
313 void visitShuffleVectorInst(ShuffleVectorInst &SVI);
315 void visitInsertValueInst(InsertValueInst &I);
316 void visitExtractValueInst(ExtractValueInst &I);
318 void visitInstruction(Instruction &I) {
320 errs() << "C Writer does not know about " << I;
325 void outputLValue(Instruction *I) {
326 Out << " " << GetValueName(I) << " = ";
329 bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To);
330 void printPHICopiesForSuccessor(BasicBlock *CurBlock,
331 BasicBlock *Successor, unsigned Indent);
332 void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
334 void printGEPExpression(Value *Ptr, gep_type_iterator I,
335 gep_type_iterator E, bool Static);
337 std::string GetValueName(const Value *Operand);
341 char CWriter::ID = 0;
343 /// This method inserts names for any unnamed structure types that are used by
344 /// the program, and removes names from structure types that are not used by the
347 bool CBackendNameAllUsedStructsAndMergeFunctions::runOnModule(Module &M) {
348 // Get a set of types that are used by the program...
349 std::set<const Type *> UT = getAnalysis<FindUsedTypes>().getTypes();
351 // Loop over the module symbol table, removing types from UT that are
352 // already named, and removing names for types that are not used.
354 TypeSymbolTable &TST = M.getTypeSymbolTable();
355 for (TypeSymbolTable::iterator TI = TST.begin(), TE = TST.end();
357 TypeSymbolTable::iterator I = TI++;
359 // If this isn't a struct or array type, remove it from our set of types
360 // to name. This simplifies emission later.
361 if (!isa<StructType>(I->second) && !isa<OpaqueType>(I->second) &&
362 !isa<ArrayType>(I->second)) {
365 // If this is not used, remove it from the symbol table.
366 std::set<const Type *>::iterator UTI = UT.find(I->second);
370 UT.erase(UTI); // Only keep one name for this type.
374 // UT now contains types that are not named. Loop over it, naming
377 bool Changed = false;
378 unsigned RenameCounter = 0;
379 for (std::set<const Type *>::const_iterator I = UT.begin(), E = UT.end();
381 if (isa<StructType>(*I) || isa<ArrayType>(*I)) {
382 while (M.addTypeName("unnamed"+utostr(RenameCounter), *I))
388 // Loop over all external functions and globals. If we have two with
389 // identical names, merge them.
390 // FIXME: This code should disappear when we don't allow values with the same
391 // names when they have different types!
392 std::map<std::string, GlobalValue*> ExtSymbols;
393 for (Module::iterator I = M.begin(), E = M.end(); I != E;) {
395 if (GV->isDeclaration() && GV->hasName()) {
396 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
397 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
399 // Found a conflict, replace this global with the previous one.
400 GlobalValue *OldGV = X.first->second;
401 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
402 GV->eraseFromParent();
407 // Do the same for globals.
408 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
410 GlobalVariable *GV = I++;
411 if (GV->isDeclaration() && GV->hasName()) {
412 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
413 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
415 // Found a conflict, replace this global with the previous one.
416 GlobalValue *OldGV = X.first->second;
417 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
418 GV->eraseFromParent();
427 /// printStructReturnPointerFunctionType - This is like printType for a struct
428 /// return type, except, instead of printing the type as void (*)(Struct*, ...)
429 /// print it as "Struct (*)(...)", for struct return functions.
430 void CWriter::printStructReturnPointerFunctionType(formatted_raw_ostream &Out,
431 const AttrListPtr &PAL,
432 const PointerType *TheTy) {
433 const FunctionType *FTy = cast<FunctionType>(TheTy->getElementType());
434 std::stringstream FunctionInnards;
435 FunctionInnards << " (*) (";
436 bool PrintedType = false;
438 FunctionType::param_iterator I = FTy->param_begin(), E = FTy->param_end();
439 const Type *RetTy = cast<PointerType>(I->get())->getElementType();
441 for (++I, ++Idx; I != E; ++I, ++Idx) {
443 FunctionInnards << ", ";
444 const Type *ArgTy = *I;
445 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
446 assert(isa<PointerType>(ArgTy));
447 ArgTy = cast<PointerType>(ArgTy)->getElementType();
449 printType(FunctionInnards, ArgTy,
450 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
453 if (FTy->isVarArg()) {
455 FunctionInnards << ", ...";
456 } else if (!PrintedType) {
457 FunctionInnards << "void";
459 FunctionInnards << ')';
460 std::string tstr = FunctionInnards.str();
461 printType(Out, RetTy,
462 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
466 CWriter::printSimpleType(formatted_raw_ostream &Out, const Type *Ty,
468 const std::string &NameSoFar) {
469 assert((Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) &&
470 "Invalid type for printSimpleType");
471 switch (Ty->getTypeID()) {
472 case Type::VoidTyID: return Out << "void " << NameSoFar;
473 case Type::IntegerTyID: {
474 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
476 return Out << "bool " << NameSoFar;
477 else if (NumBits <= 8)
478 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
479 else if (NumBits <= 16)
480 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
481 else if (NumBits <= 32)
482 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
483 else if (NumBits <= 64)
484 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
486 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
487 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
490 case Type::FloatTyID: return Out << "float " << NameSoFar;
491 case Type::DoubleTyID: return Out << "double " << NameSoFar;
492 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
493 // present matches host 'long double'.
494 case Type::X86_FP80TyID:
495 case Type::PPC_FP128TyID:
496 case Type::FP128TyID: return Out << "long double " << NameSoFar;
498 case Type::VectorTyID: {
499 const VectorType *VTy = cast<VectorType>(Ty);
500 return printSimpleType(Out, VTy->getElementType(), isSigned,
501 " __attribute__((vector_size(" +
502 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
507 errs() << "Unknown primitive type: " << *Ty << "\n";
514 CWriter::printSimpleType(std::ostream &Out, const Type *Ty, bool isSigned,
515 const std::string &NameSoFar) {
516 assert((Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) &&
517 "Invalid type for printSimpleType");
518 switch (Ty->getTypeID()) {
519 case Type::VoidTyID: return Out << "void " << NameSoFar;
520 case Type::IntegerTyID: {
521 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
523 return Out << "bool " << NameSoFar;
524 else if (NumBits <= 8)
525 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
526 else if (NumBits <= 16)
527 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
528 else if (NumBits <= 32)
529 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
530 else if (NumBits <= 64)
531 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
533 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
534 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
537 case Type::FloatTyID: return Out << "float " << NameSoFar;
538 case Type::DoubleTyID: return Out << "double " << NameSoFar;
539 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
540 // present matches host 'long double'.
541 case Type::X86_FP80TyID:
542 case Type::PPC_FP128TyID:
543 case Type::FP128TyID: return Out << "long double " << NameSoFar;
545 case Type::VectorTyID: {
546 const VectorType *VTy = cast<VectorType>(Ty);
547 return printSimpleType(Out, VTy->getElementType(), isSigned,
548 " __attribute__((vector_size(" +
549 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
554 errs() << "Unknown primitive type: " << *Ty << "\n";
560 // Pass the Type* and the variable name and this prints out the variable
563 raw_ostream &CWriter::printType(formatted_raw_ostream &Out,
565 bool isSigned, const std::string &NameSoFar,
566 bool IgnoreName, const AttrListPtr &PAL) {
567 if (Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) {
568 printSimpleType(Out, Ty, isSigned, NameSoFar);
572 // Check to see if the type is named.
573 if (!IgnoreName || isa<OpaqueType>(Ty)) {
574 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
575 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
578 switch (Ty->getTypeID()) {
579 case Type::FunctionTyID: {
580 const FunctionType *FTy = cast<FunctionType>(Ty);
581 std::stringstream FunctionInnards;
582 FunctionInnards << " (" << NameSoFar << ") (";
584 for (FunctionType::param_iterator I = FTy->param_begin(),
585 E = FTy->param_end(); I != E; ++I) {
586 const Type *ArgTy = *I;
587 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
588 assert(isa<PointerType>(ArgTy));
589 ArgTy = cast<PointerType>(ArgTy)->getElementType();
591 if (I != FTy->param_begin())
592 FunctionInnards << ", ";
593 printType(FunctionInnards, ArgTy,
594 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
597 if (FTy->isVarArg()) {
598 if (FTy->getNumParams())
599 FunctionInnards << ", ...";
600 } else if (!FTy->getNumParams()) {
601 FunctionInnards << "void";
603 FunctionInnards << ')';
604 std::string tstr = FunctionInnards.str();
605 printType(Out, FTy->getReturnType(),
606 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
609 case Type::StructTyID: {
610 const StructType *STy = cast<StructType>(Ty);
611 Out << NameSoFar + " {\n";
613 for (StructType::element_iterator I = STy->element_begin(),
614 E = STy->element_end(); I != E; ++I) {
616 printType(Out, *I, false, "field" + utostr(Idx++));
621 Out << " __attribute__ ((packed))";
625 case Type::PointerTyID: {
626 const PointerType *PTy = cast<PointerType>(Ty);
627 std::string ptrName = "*" + NameSoFar;
629 if (isa<ArrayType>(PTy->getElementType()) ||
630 isa<VectorType>(PTy->getElementType()))
631 ptrName = "(" + ptrName + ")";
634 // Must be a function ptr cast!
635 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
636 return printType(Out, PTy->getElementType(), false, ptrName);
639 case Type::ArrayTyID: {
640 const ArrayType *ATy = cast<ArrayType>(Ty);
641 unsigned NumElements = ATy->getNumElements();
642 if (NumElements == 0) NumElements = 1;
643 // Arrays are wrapped in structs to allow them to have normal
644 // value semantics (avoiding the array "decay").
645 Out << NameSoFar << " { ";
646 printType(Out, ATy->getElementType(), false,
647 "array[" + utostr(NumElements) + "]");
651 case Type::OpaqueTyID: {
652 std::string TyName = "struct opaque_" + itostr(OpaqueCounter++);
653 assert(TypeNames.find(Ty) == TypeNames.end());
654 TypeNames[Ty] = TyName;
655 return Out << TyName << ' ' << NameSoFar;
658 llvm_unreachable("Unhandled case in getTypeProps!");
664 // Pass the Type* and the variable name and this prints out the variable
667 std::ostream &CWriter::printType(std::ostream &Out, const Type *Ty,
668 bool isSigned, const std::string &NameSoFar,
669 bool IgnoreName, const AttrListPtr &PAL) {
670 if (Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) {
671 printSimpleType(Out, Ty, isSigned, NameSoFar);
675 // Check to see if the type is named.
676 if (!IgnoreName || isa<OpaqueType>(Ty)) {
677 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
678 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
681 switch (Ty->getTypeID()) {
682 case Type::FunctionTyID: {
683 const FunctionType *FTy = cast<FunctionType>(Ty);
684 std::stringstream FunctionInnards;
685 FunctionInnards << " (" << NameSoFar << ") (";
687 for (FunctionType::param_iterator I = FTy->param_begin(),
688 E = FTy->param_end(); I != E; ++I) {
689 const Type *ArgTy = *I;
690 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
691 assert(isa<PointerType>(ArgTy));
692 ArgTy = cast<PointerType>(ArgTy)->getElementType();
694 if (I != FTy->param_begin())
695 FunctionInnards << ", ";
696 printType(FunctionInnards, ArgTy,
697 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
700 if (FTy->isVarArg()) {
701 if (FTy->getNumParams())
702 FunctionInnards << ", ...";
703 } else if (!FTy->getNumParams()) {
704 FunctionInnards << "void";
706 FunctionInnards << ')';
707 std::string tstr = FunctionInnards.str();
708 printType(Out, FTy->getReturnType(),
709 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
712 case Type::StructTyID: {
713 const StructType *STy = cast<StructType>(Ty);
714 Out << NameSoFar + " {\n";
716 for (StructType::element_iterator I = STy->element_begin(),
717 E = STy->element_end(); I != E; ++I) {
719 printType(Out, *I, false, "field" + utostr(Idx++));
724 Out << " __attribute__ ((packed))";
728 case Type::PointerTyID: {
729 const PointerType *PTy = cast<PointerType>(Ty);
730 std::string ptrName = "*" + NameSoFar;
732 if (isa<ArrayType>(PTy->getElementType()) ||
733 isa<VectorType>(PTy->getElementType()))
734 ptrName = "(" + ptrName + ")";
737 // Must be a function ptr cast!
738 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
739 return printType(Out, PTy->getElementType(), false, ptrName);
742 case Type::ArrayTyID: {
743 const ArrayType *ATy = cast<ArrayType>(Ty);
744 unsigned NumElements = ATy->getNumElements();
745 if (NumElements == 0) NumElements = 1;
746 // Arrays are wrapped in structs to allow them to have normal
747 // value semantics (avoiding the array "decay").
748 Out << NameSoFar << " { ";
749 printType(Out, ATy->getElementType(), false,
750 "array[" + utostr(NumElements) + "]");
754 case Type::OpaqueTyID: {
755 std::string TyName = "struct opaque_" + itostr(OpaqueCounter++);
756 assert(TypeNames.find(Ty) == TypeNames.end());
757 TypeNames[Ty] = TyName;
758 return Out << TyName << ' ' << NameSoFar;
761 llvm_unreachable("Unhandled case in getTypeProps!");
767 void CWriter::printConstantArray(ConstantArray *CPA, bool Static) {
769 // As a special case, print the array as a string if it is an array of
770 // ubytes or an array of sbytes with positive values.
772 const Type *ETy = CPA->getType()->getElementType();
773 bool isString = (ETy == Type::getInt8Ty(CPA->getContext()) ||
774 ETy == Type::getInt8Ty(CPA->getContext()));
776 // Make sure the last character is a null char, as automatically added by C
777 if (isString && (CPA->getNumOperands() == 0 ||
778 !cast<Constant>(*(CPA->op_end()-1))->isNullValue()))
783 // Keep track of whether the last number was a hexadecimal escape
784 bool LastWasHex = false;
786 // Do not include the last character, which we know is null
787 for (unsigned i = 0, e = CPA->getNumOperands()-1; i != e; ++i) {
788 unsigned char C = cast<ConstantInt>(CPA->getOperand(i))->getZExtValue();
790 // Print it out literally if it is a printable character. The only thing
791 // to be careful about is when the last letter output was a hex escape
792 // code, in which case we have to be careful not to print out hex digits
793 // explicitly (the C compiler thinks it is a continuation of the previous
794 // character, sheesh...)
796 if (isprint(C) && (!LastWasHex || !isxdigit(C))) {
798 if (C == '"' || C == '\\')
799 Out << "\\" << (char)C;
805 case '\n': Out << "\\n"; break;
806 case '\t': Out << "\\t"; break;
807 case '\r': Out << "\\r"; break;
808 case '\v': Out << "\\v"; break;
809 case '\a': Out << "\\a"; break;
810 case '\"': Out << "\\\""; break;
811 case '\'': Out << "\\\'"; break;
814 Out << (char)(( C/16 < 10) ? ( C/16 +'0') : ( C/16 -10+'A'));
815 Out << (char)(((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A'));
824 if (CPA->getNumOperands()) {
826 printConstant(cast<Constant>(CPA->getOperand(0)), Static);
827 for (unsigned i = 1, e = CPA->getNumOperands(); i != e; ++i) {
829 printConstant(cast<Constant>(CPA->getOperand(i)), Static);
836 void CWriter::printConstantVector(ConstantVector *CP, bool Static) {
838 if (CP->getNumOperands()) {
840 printConstant(cast<Constant>(CP->getOperand(0)), Static);
841 for (unsigned i = 1, e = CP->getNumOperands(); i != e; ++i) {
843 printConstant(cast<Constant>(CP->getOperand(i)), Static);
849 // isFPCSafeToPrint - Returns true if we may assume that CFP may be written out
850 // textually as a double (rather than as a reference to a stack-allocated
851 // variable). We decide this by converting CFP to a string and back into a
852 // double, and then checking whether the conversion results in a bit-equal
853 // double to the original value of CFP. This depends on us and the target C
854 // compiler agreeing on the conversion process (which is pretty likely since we
855 // only deal in IEEE FP).
857 static bool isFPCSafeToPrint(const ConstantFP *CFP) {
859 // Do long doubles in hex for now.
860 if (CFP->getType() != Type::getFloatTy(CFP->getContext()) &&
861 CFP->getType() != Type::getDoubleTy(CFP->getContext()))
863 APFloat APF = APFloat(CFP->getValueAPF()); // copy
864 if (CFP->getType() == Type::getFloatTy(CFP->getContext()))
865 APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &ignored);
866 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
868 sprintf(Buffer, "%a", APF.convertToDouble());
869 if (!strncmp(Buffer, "0x", 2) ||
870 !strncmp(Buffer, "-0x", 3) ||
871 !strncmp(Buffer, "+0x", 3))
872 return APF.bitwiseIsEqual(APFloat(atof(Buffer)));
875 std::string StrVal = ftostr(APF);
877 while (StrVal[0] == ' ')
878 StrVal.erase(StrVal.begin());
880 // Check to make sure that the stringized number is not some string like "Inf"
881 // or NaN. Check that the string matches the "[-+]?[0-9]" regex.
882 if ((StrVal[0] >= '0' && StrVal[0] <= '9') ||
883 ((StrVal[0] == '-' || StrVal[0] == '+') &&
884 (StrVal[1] >= '0' && StrVal[1] <= '9')))
885 // Reparse stringized version!
886 return APF.bitwiseIsEqual(APFloat(atof(StrVal.c_str())));
891 /// Print out the casting for a cast operation. This does the double casting
892 /// necessary for conversion to the destination type, if necessary.
893 /// @brief Print a cast
894 void CWriter::printCast(unsigned opc, const Type *SrcTy, const Type *DstTy) {
895 // Print the destination type cast
897 case Instruction::UIToFP:
898 case Instruction::SIToFP:
899 case Instruction::IntToPtr:
900 case Instruction::Trunc:
901 case Instruction::BitCast:
902 case Instruction::FPExt:
903 case Instruction::FPTrunc: // For these the DstTy sign doesn't matter
905 printType(Out, DstTy);
908 case Instruction::ZExt:
909 case Instruction::PtrToInt:
910 case Instruction::FPToUI: // For these, make sure we get an unsigned dest
912 printSimpleType(Out, DstTy, false);
915 case Instruction::SExt:
916 case Instruction::FPToSI: // For these, make sure we get a signed dest
918 printSimpleType(Out, DstTy, true);
922 llvm_unreachable("Invalid cast opcode");
925 // Print the source type cast
927 case Instruction::UIToFP:
928 case Instruction::ZExt:
930 printSimpleType(Out, SrcTy, false);
933 case Instruction::SIToFP:
934 case Instruction::SExt:
936 printSimpleType(Out, SrcTy, true);
939 case Instruction::IntToPtr:
940 case Instruction::PtrToInt:
941 // Avoid "cast to pointer from integer of different size" warnings
942 Out << "(unsigned long)";
944 case Instruction::Trunc:
945 case Instruction::BitCast:
946 case Instruction::FPExt:
947 case Instruction::FPTrunc:
948 case Instruction::FPToSI:
949 case Instruction::FPToUI:
950 break; // These don't need a source cast.
952 llvm_unreachable("Invalid cast opcode");
957 // printConstant - The LLVM Constant to C Constant converter.
958 void CWriter::printConstant(Constant *CPV, bool Static) {
959 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
960 switch (CE->getOpcode()) {
961 case Instruction::Trunc:
962 case Instruction::ZExt:
963 case Instruction::SExt:
964 case Instruction::FPTrunc:
965 case Instruction::FPExt:
966 case Instruction::UIToFP:
967 case Instruction::SIToFP:
968 case Instruction::FPToUI:
969 case Instruction::FPToSI:
970 case Instruction::PtrToInt:
971 case Instruction::IntToPtr:
972 case Instruction::BitCast:
974 printCast(CE->getOpcode(), CE->getOperand(0)->getType(), CE->getType());
975 if (CE->getOpcode() == Instruction::SExt &&
976 CE->getOperand(0)->getType() == Type::getInt1Ty(CPV->getContext())) {
977 // Make sure we really sext from bool here by subtracting from 0
980 printConstant(CE->getOperand(0), Static);
981 if (CE->getType() == Type::getInt1Ty(CPV->getContext()) &&
982 (CE->getOpcode() == Instruction::Trunc ||
983 CE->getOpcode() == Instruction::FPToUI ||
984 CE->getOpcode() == Instruction::FPToSI ||
985 CE->getOpcode() == Instruction::PtrToInt)) {
986 // Make sure we really truncate to bool here by anding with 1
992 case Instruction::GetElementPtr:
994 printGEPExpression(CE->getOperand(0), gep_type_begin(CPV),
995 gep_type_end(CPV), Static);
998 case Instruction::Select:
1000 printConstant(CE->getOperand(0), Static);
1002 printConstant(CE->getOperand(1), Static);
1004 printConstant(CE->getOperand(2), Static);
1007 case Instruction::Add:
1008 case Instruction::FAdd:
1009 case Instruction::Sub:
1010 case Instruction::FSub:
1011 case Instruction::Mul:
1012 case Instruction::FMul:
1013 case Instruction::SDiv:
1014 case Instruction::UDiv:
1015 case Instruction::FDiv:
1016 case Instruction::URem:
1017 case Instruction::SRem:
1018 case Instruction::FRem:
1019 case Instruction::And:
1020 case Instruction::Or:
1021 case Instruction::Xor:
1022 case Instruction::ICmp:
1023 case Instruction::Shl:
1024 case Instruction::LShr:
1025 case Instruction::AShr:
1028 bool NeedsClosingParens = printConstExprCast(CE, Static);
1029 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
1030 switch (CE->getOpcode()) {
1031 case Instruction::Add:
1032 case Instruction::FAdd: Out << " + "; break;
1033 case Instruction::Sub:
1034 case Instruction::FSub: Out << " - "; break;
1035 case Instruction::Mul:
1036 case Instruction::FMul: Out << " * "; break;
1037 case Instruction::URem:
1038 case Instruction::SRem:
1039 case Instruction::FRem: Out << " % "; break;
1040 case Instruction::UDiv:
1041 case Instruction::SDiv:
1042 case Instruction::FDiv: Out << " / "; break;
1043 case Instruction::And: Out << " & "; break;
1044 case Instruction::Or: Out << " | "; break;
1045 case Instruction::Xor: Out << " ^ "; break;
1046 case Instruction::Shl: Out << " << "; break;
1047 case Instruction::LShr:
1048 case Instruction::AShr: Out << " >> "; break;
1049 case Instruction::ICmp:
1050 switch (CE->getPredicate()) {
1051 case ICmpInst::ICMP_EQ: Out << " == "; break;
1052 case ICmpInst::ICMP_NE: Out << " != "; break;
1053 case ICmpInst::ICMP_SLT:
1054 case ICmpInst::ICMP_ULT: Out << " < "; break;
1055 case ICmpInst::ICMP_SLE:
1056 case ICmpInst::ICMP_ULE: Out << " <= "; break;
1057 case ICmpInst::ICMP_SGT:
1058 case ICmpInst::ICMP_UGT: Out << " > "; break;
1059 case ICmpInst::ICMP_SGE:
1060 case ICmpInst::ICMP_UGE: Out << " >= "; break;
1061 default: llvm_unreachable("Illegal ICmp predicate");
1064 default: llvm_unreachable("Illegal opcode here!");
1066 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
1067 if (NeedsClosingParens)
1072 case Instruction::FCmp: {
1074 bool NeedsClosingParens = printConstExprCast(CE, Static);
1075 if (CE->getPredicate() == FCmpInst::FCMP_FALSE)
1077 else if (CE->getPredicate() == FCmpInst::FCMP_TRUE)
1081 switch (CE->getPredicate()) {
1082 default: llvm_unreachable("Illegal FCmp predicate");
1083 case FCmpInst::FCMP_ORD: op = "ord"; break;
1084 case FCmpInst::FCMP_UNO: op = "uno"; break;
1085 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
1086 case FCmpInst::FCMP_UNE: op = "une"; break;
1087 case FCmpInst::FCMP_ULT: op = "ult"; break;
1088 case FCmpInst::FCMP_ULE: op = "ule"; break;
1089 case FCmpInst::FCMP_UGT: op = "ugt"; break;
1090 case FCmpInst::FCMP_UGE: op = "uge"; break;
1091 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
1092 case FCmpInst::FCMP_ONE: op = "one"; break;
1093 case FCmpInst::FCMP_OLT: op = "olt"; break;
1094 case FCmpInst::FCMP_OLE: op = "ole"; break;
1095 case FCmpInst::FCMP_OGT: op = "ogt"; break;
1096 case FCmpInst::FCMP_OGE: op = "oge"; break;
1098 Out << "llvm_fcmp_" << op << "(";
1099 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
1101 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
1104 if (NeedsClosingParens)
1111 errs() << "CWriter Error: Unhandled constant expression: "
1114 llvm_unreachable(0);
1116 } else if (isa<UndefValue>(CPV) && CPV->getType()->isSingleValueType()) {
1118 printType(Out, CPV->getType()); // sign doesn't matter
1119 Out << ")/*UNDEF*/";
1120 if (!isa<VectorType>(CPV->getType())) {
1128 if (ConstantInt *CI = dyn_cast<ConstantInt>(CPV)) {
1129 const Type* Ty = CI->getType();
1130 if (Ty == Type::getInt1Ty(CPV->getContext()))
1131 Out << (CI->getZExtValue() ? '1' : '0');
1132 else if (Ty == Type::getInt32Ty(CPV->getContext()))
1133 Out << CI->getZExtValue() << 'u';
1134 else if (Ty->getPrimitiveSizeInBits() > 32)
1135 Out << CI->getZExtValue() << "ull";
1138 printSimpleType(Out, Ty, false) << ')';
1139 if (CI->isMinValue(true))
1140 Out << CI->getZExtValue() << 'u';
1142 Out << CI->getSExtValue();
1148 switch (CPV->getType()->getTypeID()) {
1149 case Type::FloatTyID:
1150 case Type::DoubleTyID:
1151 case Type::X86_FP80TyID:
1152 case Type::PPC_FP128TyID:
1153 case Type::FP128TyID: {
1154 ConstantFP *FPC = cast<ConstantFP>(CPV);
1155 std::map<const ConstantFP*, unsigned>::iterator I = FPConstantMap.find(FPC);
1156 if (I != FPConstantMap.end()) {
1157 // Because of FP precision problems we must load from a stack allocated
1158 // value that holds the value in hex.
1159 Out << "(*(" << (FPC->getType() == Type::getFloatTy(CPV->getContext()) ?
1161 FPC->getType() == Type::getDoubleTy(CPV->getContext()) ?
1164 << "*)&FPConstant" << I->second << ')';
1167 if (FPC->getType() == Type::getFloatTy(CPV->getContext()))
1168 V = FPC->getValueAPF().convertToFloat();
1169 else if (FPC->getType() == Type::getDoubleTy(CPV->getContext()))
1170 V = FPC->getValueAPF().convertToDouble();
1172 // Long double. Convert the number to double, discarding precision.
1173 // This is not awesome, but it at least makes the CBE output somewhat
1175 APFloat Tmp = FPC->getValueAPF();
1177 Tmp.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &LosesInfo);
1178 V = Tmp.convertToDouble();
1184 // FIXME the actual NaN bits should be emitted.
1185 // The prefix for a quiet NaN is 0x7FF8. For a signalling NaN,
1187 const unsigned long QuietNaN = 0x7ff8UL;
1188 //const unsigned long SignalNaN = 0x7ff4UL;
1190 // We need to grab the first part of the FP #
1193 uint64_t ll = DoubleToBits(V);
1194 sprintf(Buffer, "0x%llx", static_cast<long long>(ll));
1196 std::string Num(&Buffer[0], &Buffer[6]);
1197 unsigned long Val = strtoul(Num.c_str(), 0, 16);
1199 if (FPC->getType() == Type::getFloatTy(FPC->getContext()))
1200 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "F(\""
1201 << Buffer << "\") /*nan*/ ";
1203 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "(\""
1204 << Buffer << "\") /*nan*/ ";
1205 } else if (IsInf(V)) {
1207 if (V < 0) Out << '-';
1208 Out << "LLVM_INF" <<
1209 (FPC->getType() == Type::getFloatTy(FPC->getContext()) ? "F" : "")
1213 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
1214 // Print out the constant as a floating point number.
1216 sprintf(Buffer, "%a", V);
1219 Num = ftostr(FPC->getValueAPF());
1227 case Type::ArrayTyID:
1228 // Use C99 compound expression literal initializer syntax.
1231 printType(Out, CPV->getType());
1234 Out << "{ "; // Arrays are wrapped in struct types.
1235 if (ConstantArray *CA = dyn_cast<ConstantArray>(CPV)) {
1236 printConstantArray(CA, Static);
1238 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1239 const ArrayType *AT = cast<ArrayType>(CPV->getType());
1241 if (AT->getNumElements()) {
1243 Constant *CZ = Constant::getNullValue(AT->getElementType());
1244 printConstant(CZ, Static);
1245 for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
1247 printConstant(CZ, Static);
1252 Out << " }"; // Arrays are wrapped in struct types.
1255 case Type::VectorTyID:
1256 // Use C99 compound expression literal initializer syntax.
1259 printType(Out, CPV->getType());
1262 if (ConstantVector *CV = dyn_cast<ConstantVector>(CPV)) {
1263 printConstantVector(CV, Static);
1265 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1266 const VectorType *VT = cast<VectorType>(CPV->getType());
1268 Constant *CZ = Constant::getNullValue(VT->getElementType());
1269 printConstant(CZ, Static);
1270 for (unsigned i = 1, e = VT->getNumElements(); i != e; ++i) {
1272 printConstant(CZ, Static);
1278 case Type::StructTyID:
1279 // Use C99 compound expression literal initializer syntax.
1282 printType(Out, CPV->getType());
1285 if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
1286 const StructType *ST = cast<StructType>(CPV->getType());
1288 if (ST->getNumElements()) {
1290 printConstant(Constant::getNullValue(ST->getElementType(0)), Static);
1291 for (unsigned i = 1, e = ST->getNumElements(); i != e; ++i) {
1293 printConstant(Constant::getNullValue(ST->getElementType(i)), Static);
1299 if (CPV->getNumOperands()) {
1301 printConstant(cast<Constant>(CPV->getOperand(0)), Static);
1302 for (unsigned i = 1, e = CPV->getNumOperands(); i != e; ++i) {
1304 printConstant(cast<Constant>(CPV->getOperand(i)), Static);
1311 case Type::PointerTyID:
1312 if (isa<ConstantPointerNull>(CPV)) {
1314 printType(Out, CPV->getType()); // sign doesn't matter
1315 Out << ")/*NULL*/0)";
1317 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(CPV)) {
1318 writeOperand(GV, Static);
1324 errs() << "Unknown constant type: " << *CPV << "\n";
1326 llvm_unreachable(0);
1330 // Some constant expressions need to be casted back to the original types
1331 // because their operands were casted to the expected type. This function takes
1332 // care of detecting that case and printing the cast for the ConstantExpr.
1333 bool CWriter::printConstExprCast(const ConstantExpr* CE, bool Static) {
1334 bool NeedsExplicitCast = false;
1335 const Type *Ty = CE->getOperand(0)->getType();
1336 bool TypeIsSigned = false;
1337 switch (CE->getOpcode()) {
1338 case Instruction::Add:
1339 case Instruction::Sub:
1340 case Instruction::Mul:
1341 // We need to cast integer arithmetic so that it is always performed
1342 // as unsigned, to avoid undefined behavior on overflow.
1343 case Instruction::LShr:
1344 case Instruction::URem:
1345 case Instruction::UDiv: NeedsExplicitCast = true; break;
1346 case Instruction::AShr:
1347 case Instruction::SRem:
1348 case Instruction::SDiv: NeedsExplicitCast = true; TypeIsSigned = true; break;
1349 case Instruction::SExt:
1351 NeedsExplicitCast = true;
1352 TypeIsSigned = true;
1354 case Instruction::ZExt:
1355 case Instruction::Trunc:
1356 case Instruction::FPTrunc:
1357 case Instruction::FPExt:
1358 case Instruction::UIToFP:
1359 case Instruction::SIToFP:
1360 case Instruction::FPToUI:
1361 case Instruction::FPToSI:
1362 case Instruction::PtrToInt:
1363 case Instruction::IntToPtr:
1364 case Instruction::BitCast:
1366 NeedsExplicitCast = true;
1370 if (NeedsExplicitCast) {
1372 if (Ty->isInteger() && Ty != Type::getInt1Ty(Ty->getContext()))
1373 printSimpleType(Out, Ty, TypeIsSigned);
1375 printType(Out, Ty); // not integer, sign doesn't matter
1378 return NeedsExplicitCast;
1381 // Print a constant assuming that it is the operand for a given Opcode. The
1382 // opcodes that care about sign need to cast their operands to the expected
1383 // type before the operation proceeds. This function does the casting.
1384 void CWriter::printConstantWithCast(Constant* CPV, unsigned Opcode) {
1386 // Extract the operand's type, we'll need it.
1387 const Type* OpTy = CPV->getType();
1389 // Indicate whether to do the cast or not.
1390 bool shouldCast = false;
1391 bool typeIsSigned = false;
1393 // Based on the Opcode for which this Constant is being written, determine
1394 // the new type to which the operand should be casted by setting the value
1395 // of OpTy. If we change OpTy, also set shouldCast to true so it gets
1399 // for most instructions, it doesn't matter
1401 case Instruction::Add:
1402 case Instruction::Sub:
1403 case Instruction::Mul:
1404 // We need to cast integer arithmetic so that it is always performed
1405 // as unsigned, to avoid undefined behavior on overflow.
1406 case Instruction::LShr:
1407 case Instruction::UDiv:
1408 case Instruction::URem:
1411 case Instruction::AShr:
1412 case Instruction::SDiv:
1413 case Instruction::SRem:
1415 typeIsSigned = true;
1419 // Write out the casted constant if we should, otherwise just write the
1423 printSimpleType(Out, OpTy, typeIsSigned);
1425 printConstant(CPV, false);
1428 printConstant(CPV, false);
1431 std::string CWriter::GetValueName(const Value *Operand) {
1432 // Mangle globals with the standard mangler interface for LLC compatibility.
1433 if (const GlobalValue *GV = dyn_cast<GlobalValue>(Operand))
1434 return Mang->getMangledName(GV);
1436 std::string Name = Operand->getName();
1438 if (Name.empty()) { // Assign unique names to local temporaries.
1439 unsigned &No = AnonValueNumbers[Operand];
1441 No = ++NextAnonValueNumber;
1442 Name = "tmp__" + utostr(No);
1445 std::string VarName;
1446 VarName.reserve(Name.capacity());
1448 for (std::string::iterator I = Name.begin(), E = Name.end();
1452 if (!((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
1453 (ch >= '0' && ch <= '9') || ch == '_')) {
1455 sprintf(buffer, "_%x_", ch);
1461 return "llvm_cbe_" + VarName;
1464 /// writeInstComputationInline - Emit the computation for the specified
1465 /// instruction inline, with no destination provided.
1466 void CWriter::writeInstComputationInline(Instruction &I) {
1467 // We can't currently support integer types other than 1, 8, 16, 32, 64.
1469 const Type *Ty = I.getType();
1470 if (Ty->isInteger() && (Ty!=Type::getInt1Ty(I.getContext()) &&
1471 Ty!=Type::getInt8Ty(I.getContext()) &&
1472 Ty!=Type::getInt16Ty(I.getContext()) &&
1473 Ty!=Type::getInt32Ty(I.getContext()) &&
1474 Ty!=Type::getInt64Ty(I.getContext()))) {
1475 llvm_report_error("The C backend does not currently support integer "
1476 "types of widths other than 1, 8, 16, 32, 64.\n"
1477 "This is being tracked as PR 4158.");
1480 // If this is a non-trivial bool computation, make sure to truncate down to
1481 // a 1 bit value. This is important because we want "add i1 x, y" to return
1482 // "0" when x and y are true, not "2" for example.
1483 bool NeedBoolTrunc = false;
1484 if (I.getType() == Type::getInt1Ty(I.getContext()) &&
1485 !isa<ICmpInst>(I) && !isa<FCmpInst>(I))
1486 NeedBoolTrunc = true;
1498 void CWriter::writeOperandInternal(Value *Operand, bool Static) {
1499 if (Instruction *I = dyn_cast<Instruction>(Operand))
1500 // Should we inline this instruction to build a tree?
1501 if (isInlinableInst(*I) && !isDirectAlloca(I)) {
1503 writeInstComputationInline(*I);
1508 Constant* CPV = dyn_cast<Constant>(Operand);
1510 if (CPV && !isa<GlobalValue>(CPV))
1511 printConstant(CPV, Static);
1513 Out << GetValueName(Operand);
1516 void CWriter::writeOperand(Value *Operand, bool Static) {
1517 bool isAddressImplicit = isAddressExposed(Operand);
1518 if (isAddressImplicit)
1519 Out << "(&"; // Global variables are referenced as their addresses by llvm
1521 writeOperandInternal(Operand, Static);
1523 if (isAddressImplicit)
1527 // Some instructions need to have their result value casted back to the
1528 // original types because their operands were casted to the expected type.
1529 // This function takes care of detecting that case and printing the cast
1530 // for the Instruction.
1531 bool CWriter::writeInstructionCast(const Instruction &I) {
1532 const Type *Ty = I.getOperand(0)->getType();
1533 switch (I.getOpcode()) {
1534 case Instruction::Add:
1535 case Instruction::Sub:
1536 case Instruction::Mul:
1537 // We need to cast integer arithmetic so that it is always performed
1538 // as unsigned, to avoid undefined behavior on overflow.
1539 case Instruction::LShr:
1540 case Instruction::URem:
1541 case Instruction::UDiv:
1543 printSimpleType(Out, Ty, false);
1546 case Instruction::AShr:
1547 case Instruction::SRem:
1548 case Instruction::SDiv:
1550 printSimpleType(Out, Ty, true);
1558 // Write the operand with a cast to another type based on the Opcode being used.
1559 // This will be used in cases where an instruction has specific type
1560 // requirements (usually signedness) for its operands.
1561 void CWriter::writeOperandWithCast(Value* Operand, unsigned Opcode) {
1563 // Extract the operand's type, we'll need it.
1564 const Type* OpTy = Operand->getType();
1566 // Indicate whether to do the cast or not.
1567 bool shouldCast = false;
1569 // Indicate whether the cast should be to a signed type or not.
1570 bool castIsSigned = false;
1572 // Based on the Opcode for which this Operand is being written, determine
1573 // the new type to which the operand should be casted by setting the value
1574 // of OpTy. If we change OpTy, also set shouldCast to true.
1577 // for most instructions, it doesn't matter
1579 case Instruction::Add:
1580 case Instruction::Sub:
1581 case Instruction::Mul:
1582 // We need to cast integer arithmetic so that it is always performed
1583 // as unsigned, to avoid undefined behavior on overflow.
1584 case Instruction::LShr:
1585 case Instruction::UDiv:
1586 case Instruction::URem: // Cast to unsigned first
1588 castIsSigned = false;
1590 case Instruction::GetElementPtr:
1591 case Instruction::AShr:
1592 case Instruction::SDiv:
1593 case Instruction::SRem: // Cast to signed first
1595 castIsSigned = true;
1599 // Write out the casted operand if we should, otherwise just write the
1603 printSimpleType(Out, OpTy, castIsSigned);
1605 writeOperand(Operand);
1608 writeOperand(Operand);
1611 // Write the operand with a cast to another type based on the icmp predicate
1613 void CWriter::writeOperandWithCast(Value* Operand, const ICmpInst &Cmp) {
1614 // This has to do a cast to ensure the operand has the right signedness.
1615 // Also, if the operand is a pointer, we make sure to cast to an integer when
1616 // doing the comparison both for signedness and so that the C compiler doesn't
1617 // optimize things like "p < NULL" to false (p may contain an integer value
1619 bool shouldCast = Cmp.isRelational();
1621 // Write out the casted operand if we should, otherwise just write the
1624 writeOperand(Operand);
1628 // Should this be a signed comparison? If so, convert to signed.
1629 bool castIsSigned = Cmp.isSigned();
1631 // If the operand was a pointer, convert to a large integer type.
1632 const Type* OpTy = Operand->getType();
1633 if (isa<PointerType>(OpTy))
1634 OpTy = TD->getIntPtrType(Operand->getContext());
1637 printSimpleType(Out, OpTy, castIsSigned);
1639 writeOperand(Operand);
1643 // generateCompilerSpecificCode - This is where we add conditional compilation
1644 // directives to cater to specific compilers as need be.
1646 static void generateCompilerSpecificCode(formatted_raw_ostream& Out,
1647 const TargetData *TD) {
1648 // Alloca is hard to get, and we don't want to include stdlib.h here.
1649 Out << "/* get a declaration for alloca */\n"
1650 << "#if defined(__CYGWIN__) || defined(__MINGW32__)\n"
1651 << "#define alloca(x) __builtin_alloca((x))\n"
1652 << "#define _alloca(x) __builtin_alloca((x))\n"
1653 << "#elif defined(__APPLE__)\n"
1654 << "extern void *__builtin_alloca(unsigned long);\n"
1655 << "#define alloca(x) __builtin_alloca(x)\n"
1656 << "#define longjmp _longjmp\n"
1657 << "#define setjmp _setjmp\n"
1658 << "#elif defined(__sun__)\n"
1659 << "#if defined(__sparcv9)\n"
1660 << "extern void *__builtin_alloca(unsigned long);\n"
1662 << "extern void *__builtin_alloca(unsigned int);\n"
1664 << "#define alloca(x) __builtin_alloca(x)\n"
1665 << "#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__arm__)\n"
1666 << "#define alloca(x) __builtin_alloca(x)\n"
1667 << "#elif defined(_MSC_VER)\n"
1668 << "#define inline _inline\n"
1669 << "#define alloca(x) _alloca(x)\n"
1671 << "#include <alloca.h>\n"
1674 // We output GCC specific attributes to preserve 'linkonce'ness on globals.
1675 // If we aren't being compiled with GCC, just drop these attributes.
1676 Out << "#ifndef __GNUC__ /* Can only support \"linkonce\" vars with GCC */\n"
1677 << "#define __attribute__(X)\n"
1680 // On Mac OS X, "external weak" is spelled "__attribute__((weak_import))".
1681 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1682 << "#define __EXTERNAL_WEAK__ __attribute__((weak_import))\n"
1683 << "#elif defined(__GNUC__)\n"
1684 << "#define __EXTERNAL_WEAK__ __attribute__((weak))\n"
1686 << "#define __EXTERNAL_WEAK__\n"
1689 // For now, turn off the weak linkage attribute on Mac OS X. (See above.)
1690 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1691 << "#define __ATTRIBUTE_WEAK__\n"
1692 << "#elif defined(__GNUC__)\n"
1693 << "#define __ATTRIBUTE_WEAK__ __attribute__((weak))\n"
1695 << "#define __ATTRIBUTE_WEAK__\n"
1698 // Add hidden visibility support. FIXME: APPLE_CC?
1699 Out << "#if defined(__GNUC__)\n"
1700 << "#define __HIDDEN__ __attribute__((visibility(\"hidden\")))\n"
1703 // Define NaN and Inf as GCC builtins if using GCC, as 0 otherwise
1704 // From the GCC documentation:
1706 // double __builtin_nan (const char *str)
1708 // This is an implementation of the ISO C99 function nan.
1710 // Since ISO C99 defines this function in terms of strtod, which we do
1711 // not implement, a description of the parsing is in order. The string is
1712 // parsed as by strtol; that is, the base is recognized by leading 0 or
1713 // 0x prefixes. The number parsed is placed in the significand such that
1714 // the least significant bit of the number is at the least significant
1715 // bit of the significand. The number is truncated to fit the significand
1716 // field provided. The significand is forced to be a quiet NaN.
1718 // This function, if given a string literal, is evaluated early enough
1719 // that it is considered a compile-time constant.
1721 // float __builtin_nanf (const char *str)
1723 // Similar to __builtin_nan, except the return type is float.
1725 // double __builtin_inf (void)
1727 // Similar to __builtin_huge_val, except a warning is generated if the
1728 // target floating-point format does not support infinities. This
1729 // function is suitable for implementing the ISO C99 macro INFINITY.
1731 // float __builtin_inff (void)
1733 // Similar to __builtin_inf, except the return type is float.
1734 Out << "#ifdef __GNUC__\n"
1735 << "#define LLVM_NAN(NanStr) __builtin_nan(NanStr) /* Double */\n"
1736 << "#define LLVM_NANF(NanStr) __builtin_nanf(NanStr) /* Float */\n"
1737 << "#define LLVM_NANS(NanStr) __builtin_nans(NanStr) /* Double */\n"
1738 << "#define LLVM_NANSF(NanStr) __builtin_nansf(NanStr) /* Float */\n"
1739 << "#define LLVM_INF __builtin_inf() /* Double */\n"
1740 << "#define LLVM_INFF __builtin_inff() /* Float */\n"
1741 << "#define LLVM_PREFETCH(addr,rw,locality) "
1742 "__builtin_prefetch(addr,rw,locality)\n"
1743 << "#define __ATTRIBUTE_CTOR__ __attribute__((constructor))\n"
1744 << "#define __ATTRIBUTE_DTOR__ __attribute__((destructor))\n"
1745 << "#define LLVM_ASM __asm__\n"
1747 << "#define LLVM_NAN(NanStr) ((double)0.0) /* Double */\n"
1748 << "#define LLVM_NANF(NanStr) 0.0F /* Float */\n"
1749 << "#define LLVM_NANS(NanStr) ((double)0.0) /* Double */\n"
1750 << "#define LLVM_NANSF(NanStr) 0.0F /* Float */\n"
1751 << "#define LLVM_INF ((double)0.0) /* Double */\n"
1752 << "#define LLVM_INFF 0.0F /* Float */\n"
1753 << "#define LLVM_PREFETCH(addr,rw,locality) /* PREFETCH */\n"
1754 << "#define __ATTRIBUTE_CTOR__\n"
1755 << "#define __ATTRIBUTE_DTOR__\n"
1756 << "#define LLVM_ASM(X)\n"
1759 Out << "#if __GNUC__ < 4 /* Old GCC's, or compilers not GCC */ \n"
1760 << "#define __builtin_stack_save() 0 /* not implemented */\n"
1761 << "#define __builtin_stack_restore(X) /* noop */\n"
1764 // Output typedefs for 128-bit integers. If these are needed with a
1765 // 32-bit target or with a C compiler that doesn't support mode(TI),
1766 // more drastic measures will be needed.
1767 Out << "#if __GNUC__ && __LP64__ /* 128-bit integer types */\n"
1768 << "typedef int __attribute__((mode(TI))) llvmInt128;\n"
1769 << "typedef unsigned __attribute__((mode(TI))) llvmUInt128;\n"
1772 // Output target-specific code that should be inserted into main.
1773 Out << "#define CODE_FOR_MAIN() /* Any target-specific code for main()*/\n";
1776 /// FindStaticTors - Given a static ctor/dtor list, unpack its contents into
1777 /// the StaticTors set.
1778 static void FindStaticTors(GlobalVariable *GV, std::set<Function*> &StaticTors){
1779 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
1780 if (!InitList) return;
1782 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
1783 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
1784 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
1786 if (CS->getOperand(1)->isNullValue())
1787 return; // Found a null terminator, exit printing.
1788 Constant *FP = CS->getOperand(1);
1789 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
1791 FP = CE->getOperand(0);
1792 if (Function *F = dyn_cast<Function>(FP))
1793 StaticTors.insert(F);
1797 enum SpecialGlobalClass {
1799 GlobalCtors, GlobalDtors,
1803 /// getGlobalVariableClass - If this is a global that is specially recognized
1804 /// by LLVM, return a code that indicates how we should handle it.
1805 static SpecialGlobalClass getGlobalVariableClass(const GlobalVariable *GV) {
1806 // If this is a global ctors/dtors list, handle it now.
1807 if (GV->hasAppendingLinkage() && GV->use_empty()) {
1808 if (GV->getName() == "llvm.global_ctors")
1810 else if (GV->getName() == "llvm.global_dtors")
1814 // Otherwise, it it is other metadata, don't print it. This catches things
1815 // like debug information.
1816 if (GV->getSection() == "llvm.metadata")
1822 // PrintEscapedString - Print each character of the specified string, escaping
1823 // it if it is not printable or if it is an escape char.
1824 static void PrintEscapedString(const char *Str, unsigned Length,
1826 for (unsigned i = 0; i != Length; ++i) {
1827 unsigned char C = Str[i];
1828 if (isprint(C) && C != '\\' && C != '"')
1837 Out << "\\x" << hexdigit(C >> 4) << hexdigit(C & 0x0F);
1841 // PrintEscapedString - Print each character of the specified string, escaping
1842 // it if it is not printable or if it is an escape char.
1843 static void PrintEscapedString(const std::string &Str, raw_ostream &Out) {
1844 PrintEscapedString(Str.c_str(), Str.size(), Out);
1847 bool CWriter::doInitialization(Module &M) {
1848 FunctionPass::doInitialization(M);
1853 TD = new TargetData(&M);
1854 IL = new IntrinsicLowering(*TD);
1855 IL->AddPrototypes(M);
1857 // Ensure that all structure types have names...
1858 Mang = new Mangler(M);
1859 Mang->markCharUnacceptable('.');
1861 // Keep track of which functions are static ctors/dtors so they can have
1862 // an attribute added to their prototypes.
1863 std::set<Function*> StaticCtors, StaticDtors;
1864 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1866 switch (getGlobalVariableClass(I)) {
1869 FindStaticTors(I, StaticCtors);
1872 FindStaticTors(I, StaticDtors);
1877 // get declaration for alloca
1878 Out << "/* Provide Declarations */\n";
1879 Out << "#include <stdarg.h>\n"; // Varargs support
1880 Out << "#include <setjmp.h>\n"; // Unwind support
1881 generateCompilerSpecificCode(Out, TD);
1883 // Provide a definition for `bool' if not compiling with a C++ compiler.
1885 << "#ifndef __cplusplus\ntypedef unsigned char bool;\n#endif\n"
1887 << "\n\n/* Support for floating point constants */\n"
1888 << "typedef unsigned long long ConstantDoubleTy;\n"
1889 << "typedef unsigned int ConstantFloatTy;\n"
1890 << "typedef struct { unsigned long long f1; unsigned short f2; "
1891 "unsigned short pad[3]; } ConstantFP80Ty;\n"
1892 // This is used for both kinds of 128-bit long double; meaning differs.
1893 << "typedef struct { unsigned long long f1; unsigned long long f2; }"
1894 " ConstantFP128Ty;\n"
1895 << "\n\n/* Global Declarations */\n";
1897 // First output all the declarations for the program, because C requires
1898 // Functions & globals to be declared before they are used.
1900 if (!M.getModuleInlineAsm().empty()) {
1901 Out << "/* Module asm statements */\n"
1904 // Split the string into lines, to make it easier to read the .ll file.
1905 std::string Asm = M.getModuleInlineAsm();
1907 size_t NewLine = Asm.find_first_of('\n', CurPos);
1908 while (NewLine != std::string::npos) {
1909 // We found a newline, print the portion of the asm string from the
1910 // last newline up to this newline.
1912 PrintEscapedString(std::string(Asm.begin()+CurPos, Asm.begin()+NewLine),
1916 NewLine = Asm.find_first_of('\n', CurPos);
1919 PrintEscapedString(std::string(Asm.begin()+CurPos, Asm.end()), Out);
1921 << "/* End Module asm statements */\n";
1924 // Loop over the symbol table, emitting all named constants...
1925 printModuleTypes(M.getTypeSymbolTable());
1927 // Global variable declarations...
1928 if (!M.global_empty()) {
1929 Out << "\n/* External Global Variable Declarations */\n";
1930 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1933 if (I->hasExternalLinkage() || I->hasExternalWeakLinkage() ||
1934 I->hasCommonLinkage())
1936 else if (I->hasDLLImportLinkage())
1937 Out << "__declspec(dllimport) ";
1939 continue; // Internal Global
1941 // Thread Local Storage
1942 if (I->isThreadLocal())
1945 printType(Out, I->getType()->getElementType(), false, GetValueName(I));
1947 if (I->hasExternalWeakLinkage())
1948 Out << " __EXTERNAL_WEAK__";
1953 // Function declarations
1954 Out << "\n/* Function Declarations */\n";
1955 Out << "double fmod(double, double);\n"; // Support for FP rem
1956 Out << "float fmodf(float, float);\n";
1957 Out << "long double fmodl(long double, long double);\n";
1959 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
1960 // Don't print declarations for intrinsic functions.
1961 if (!I->isIntrinsic() && I->getName() != "setjmp" &&
1962 I->getName() != "longjmp" && I->getName() != "_setjmp") {
1963 if (I->hasExternalWeakLinkage())
1965 printFunctionSignature(I, true);
1966 if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
1967 Out << " __ATTRIBUTE_WEAK__";
1968 if (I->hasExternalWeakLinkage())
1969 Out << " __EXTERNAL_WEAK__";
1970 if (StaticCtors.count(I))
1971 Out << " __ATTRIBUTE_CTOR__";
1972 if (StaticDtors.count(I))
1973 Out << " __ATTRIBUTE_DTOR__";
1974 if (I->hasHiddenVisibility())
1975 Out << " __HIDDEN__";
1977 if (I->hasName() && I->getName()[0] == 1)
1978 Out << " LLVM_ASM(\"" << I->getName().substr(1) << "\")";
1984 // Output the global variable declarations
1985 if (!M.global_empty()) {
1986 Out << "\n\n/* Global Variable Declarations */\n";
1987 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1989 if (!I->isDeclaration()) {
1990 // Ignore special globals, such as debug info.
1991 if (getGlobalVariableClass(I))
1994 if (I->hasLocalLinkage())
1999 // Thread Local Storage
2000 if (I->isThreadLocal())
2003 printType(Out, I->getType()->getElementType(), false,
2006 if (I->hasLinkOnceLinkage())
2007 Out << " __attribute__((common))";
2008 else if (I->hasCommonLinkage()) // FIXME is this right?
2009 Out << " __ATTRIBUTE_WEAK__";
2010 else if (I->hasWeakLinkage())
2011 Out << " __ATTRIBUTE_WEAK__";
2012 else if (I->hasExternalWeakLinkage())
2013 Out << " __EXTERNAL_WEAK__";
2014 if (I->hasHiddenVisibility())
2015 Out << " __HIDDEN__";
2020 // Output the global variable definitions and contents...
2021 if (!M.global_empty()) {
2022 Out << "\n\n/* Global Variable Definitions and Initialization */\n";
2023 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
2025 if (!I->isDeclaration()) {
2026 // Ignore special globals, such as debug info.
2027 if (getGlobalVariableClass(I))
2030 if (I->hasLocalLinkage())
2032 else if (I->hasDLLImportLinkage())
2033 Out << "__declspec(dllimport) ";
2034 else if (I->hasDLLExportLinkage())
2035 Out << "__declspec(dllexport) ";
2037 // Thread Local Storage
2038 if (I->isThreadLocal())
2041 printType(Out, I->getType()->getElementType(), false,
2043 if (I->hasLinkOnceLinkage())
2044 Out << " __attribute__((common))";
2045 else if (I->hasWeakLinkage())
2046 Out << " __ATTRIBUTE_WEAK__";
2047 else if (I->hasCommonLinkage())
2048 Out << " __ATTRIBUTE_WEAK__";
2050 if (I->hasHiddenVisibility())
2051 Out << " __HIDDEN__";
2053 // If the initializer is not null, emit the initializer. If it is null,
2054 // we try to avoid emitting large amounts of zeros. The problem with
2055 // this, however, occurs when the variable has weak linkage. In this
2056 // case, the assembler will complain about the variable being both weak
2057 // and common, so we disable this optimization.
2058 // FIXME common linkage should avoid this problem.
2059 if (!I->getInitializer()->isNullValue()) {
2061 writeOperand(I->getInitializer(), true);
2062 } else if (I->hasWeakLinkage()) {
2063 // We have to specify an initializer, but it doesn't have to be
2064 // complete. If the value is an aggregate, print out { 0 }, and let
2065 // the compiler figure out the rest of the zeros.
2067 if (isa<StructType>(I->getInitializer()->getType()) ||
2068 isa<VectorType>(I->getInitializer()->getType())) {
2070 } else if (isa<ArrayType>(I->getInitializer()->getType())) {
2071 // As with structs and vectors, but with an extra set of braces
2072 // because arrays are wrapped in structs.
2075 // Just print it out normally.
2076 writeOperand(I->getInitializer(), true);
2084 Out << "\n\n/* Function Bodies */\n";
2086 // Emit some helper functions for dealing with FCMP instruction's
2088 Out << "static inline int llvm_fcmp_ord(double X, double Y) { ";
2089 Out << "return X == X && Y == Y; }\n";
2090 Out << "static inline int llvm_fcmp_uno(double X, double Y) { ";
2091 Out << "return X != X || Y != Y; }\n";
2092 Out << "static inline int llvm_fcmp_ueq(double X, double Y) { ";
2093 Out << "return X == Y || llvm_fcmp_uno(X, Y); }\n";
2094 Out << "static inline int llvm_fcmp_une(double X, double Y) { ";
2095 Out << "return X != Y; }\n";
2096 Out << "static inline int llvm_fcmp_ult(double X, double Y) { ";
2097 Out << "return X < Y || llvm_fcmp_uno(X, Y); }\n";
2098 Out << "static inline int llvm_fcmp_ugt(double X, double Y) { ";
2099 Out << "return X > Y || llvm_fcmp_uno(X, Y); }\n";
2100 Out << "static inline int llvm_fcmp_ule(double X, double Y) { ";
2101 Out << "return X <= Y || llvm_fcmp_uno(X, Y); }\n";
2102 Out << "static inline int llvm_fcmp_uge(double X, double Y) { ";
2103 Out << "return X >= Y || llvm_fcmp_uno(X, Y); }\n";
2104 Out << "static inline int llvm_fcmp_oeq(double X, double Y) { ";
2105 Out << "return X == Y ; }\n";
2106 Out << "static inline int llvm_fcmp_one(double X, double Y) { ";
2107 Out << "return X != Y && llvm_fcmp_ord(X, Y); }\n";
2108 Out << "static inline int llvm_fcmp_olt(double X, double Y) { ";
2109 Out << "return X < Y ; }\n";
2110 Out << "static inline int llvm_fcmp_ogt(double X, double Y) { ";
2111 Out << "return X > Y ; }\n";
2112 Out << "static inline int llvm_fcmp_ole(double X, double Y) { ";
2113 Out << "return X <= Y ; }\n";
2114 Out << "static inline int llvm_fcmp_oge(double X, double Y) { ";
2115 Out << "return X >= Y ; }\n";
2120 /// Output all floating point constants that cannot be printed accurately...
2121 void CWriter::printFloatingPointConstants(Function &F) {
2122 // Scan the module for floating point constants. If any FP constant is used
2123 // in the function, we want to redirect it here so that we do not depend on
2124 // the precision of the printed form, unless the printed form preserves
2127 for (constant_iterator I = constant_begin(&F), E = constant_end(&F);
2129 printFloatingPointConstants(*I);
2134 void CWriter::printFloatingPointConstants(const Constant *C) {
2135 // If this is a constant expression, recursively check for constant fp values.
2136 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
2137 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i)
2138 printFloatingPointConstants(CE->getOperand(i));
2142 // Otherwise, check for a FP constant that we need to print.
2143 const ConstantFP *FPC = dyn_cast<ConstantFP>(C);
2145 // Do not put in FPConstantMap if safe.
2146 isFPCSafeToPrint(FPC) ||
2147 // Already printed this constant?
2148 FPConstantMap.count(FPC))
2151 FPConstantMap[FPC] = FPCounter; // Number the FP constants
2153 if (FPC->getType() == Type::getDoubleTy(FPC->getContext())) {
2154 double Val = FPC->getValueAPF().convertToDouble();
2155 uint64_t i = FPC->getValueAPF().bitcastToAPInt().getZExtValue();
2156 Out << "static const ConstantDoubleTy FPConstant" << FPCounter++
2157 << " = 0x" << utohexstr(i)
2158 << "ULL; /* " << Val << " */\n";
2159 } else if (FPC->getType() == Type::getFloatTy(FPC->getContext())) {
2160 float Val = FPC->getValueAPF().convertToFloat();
2161 uint32_t i = (uint32_t)FPC->getValueAPF().bitcastToAPInt().
2163 Out << "static const ConstantFloatTy FPConstant" << FPCounter++
2164 << " = 0x" << utohexstr(i)
2165 << "U; /* " << Val << " */\n";
2166 } else if (FPC->getType() == Type::getX86_FP80Ty(FPC->getContext())) {
2167 // api needed to prevent premature destruction
2168 APInt api = FPC->getValueAPF().bitcastToAPInt();
2169 const uint64_t *p = api.getRawData();
2170 Out << "static const ConstantFP80Ty FPConstant" << FPCounter++
2171 << " = { 0x" << utohexstr(p[0])
2172 << "ULL, 0x" << utohexstr((uint16_t)p[1]) << ",{0,0,0}"
2173 << "}; /* Long double constant */\n";
2174 } else if (FPC->getType() == Type::getPPC_FP128Ty(FPC->getContext()) ||
2175 FPC->getType() == Type::getFP128Ty(FPC->getContext())) {
2176 APInt api = FPC->getValueAPF().bitcastToAPInt();
2177 const uint64_t *p = api.getRawData();
2178 Out << "static const ConstantFP128Ty FPConstant" << FPCounter++
2180 << utohexstr(p[0]) << ", 0x" << utohexstr(p[1])
2181 << "}; /* Long double constant */\n";
2184 llvm_unreachable("Unknown float type!");
2190 /// printSymbolTable - Run through symbol table looking for type names. If a
2191 /// type name is found, emit its declaration...
2193 void CWriter::printModuleTypes(const TypeSymbolTable &TST) {
2194 Out << "/* Helper union for bitcasts */\n";
2195 Out << "typedef union {\n";
2196 Out << " unsigned int Int32;\n";
2197 Out << " unsigned long long Int64;\n";
2198 Out << " float Float;\n";
2199 Out << " double Double;\n";
2200 Out << "} llvmBitCastUnion;\n";
2202 // We are only interested in the type plane of the symbol table.
2203 TypeSymbolTable::const_iterator I = TST.begin();
2204 TypeSymbolTable::const_iterator End = TST.end();
2206 // If there are no type names, exit early.
2207 if (I == End) return;
2209 // Print out forward declarations for structure types before anything else!
2210 Out << "/* Structure forward decls */\n";
2211 for (; I != End; ++I) {
2212 std::string Name = "struct l_" + Mang->makeNameProper(I->first);
2213 Out << Name << ";\n";
2214 TypeNames.insert(std::make_pair(I->second, Name));
2219 // Now we can print out typedefs. Above, we guaranteed that this can only be
2220 // for struct or opaque types.
2221 Out << "/* Typedefs */\n";
2222 for (I = TST.begin(); I != End; ++I) {
2223 std::string Name = "l_" + Mang->makeNameProper(I->first);
2225 printType(Out, I->second, false, Name);
2231 // Keep track of which structures have been printed so far...
2232 std::set<const Type *> StructPrinted;
2234 // Loop over all structures then push them into the stack so they are
2235 // printed in the correct order.
2237 Out << "/* Structure contents */\n";
2238 for (I = TST.begin(); I != End; ++I)
2239 if (isa<StructType>(I->second) || isa<ArrayType>(I->second))
2240 // Only print out used types!
2241 printContainedStructs(I->second, StructPrinted);
2244 // Push the struct onto the stack and recursively push all structs
2245 // this one depends on.
2247 // TODO: Make this work properly with vector types
2249 void CWriter::printContainedStructs(const Type *Ty,
2250 std::set<const Type*> &StructPrinted) {
2251 // Don't walk through pointers.
2252 if (isa<PointerType>(Ty) || Ty->isPrimitiveType() || Ty->isInteger()) return;
2254 // Print all contained types first.
2255 for (Type::subtype_iterator I = Ty->subtype_begin(),
2256 E = Ty->subtype_end(); I != E; ++I)
2257 printContainedStructs(*I, StructPrinted);
2259 if (isa<StructType>(Ty) || isa<ArrayType>(Ty)) {
2260 // Check to see if we have already printed this struct.
2261 if (StructPrinted.insert(Ty).second) {
2262 // Print structure type out.
2263 std::string Name = TypeNames[Ty];
2264 printType(Out, Ty, false, Name, true);
2270 void CWriter::printFunctionSignature(const Function *F, bool Prototype) {
2271 /// isStructReturn - Should this function actually return a struct by-value?
2272 bool isStructReturn = F->hasStructRetAttr();
2274 if (F->hasLocalLinkage()) Out << "static ";
2275 if (F->hasDLLImportLinkage()) Out << "__declspec(dllimport) ";
2276 if (F->hasDLLExportLinkage()) Out << "__declspec(dllexport) ";
2277 switch (F->getCallingConv()) {
2278 case CallingConv::X86_StdCall:
2279 Out << "__attribute__((stdcall)) ";
2281 case CallingConv::X86_FastCall:
2282 Out << "__attribute__((fastcall)) ";
2288 // Loop over the arguments, printing them...
2289 const FunctionType *FT = cast<FunctionType>(F->getFunctionType());
2290 const AttrListPtr &PAL = F->getAttributes();
2292 std::stringstream FunctionInnards;
2294 // Print out the name...
2295 FunctionInnards << GetValueName(F) << '(';
2297 bool PrintedArg = false;
2298 if (!F->isDeclaration()) {
2299 if (!F->arg_empty()) {
2300 Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
2303 // If this is a struct-return function, don't print the hidden
2304 // struct-return argument.
2305 if (isStructReturn) {
2306 assert(I != E && "Invalid struct return function!");
2311 std::string ArgName;
2312 for (; I != E; ++I) {
2313 if (PrintedArg) FunctionInnards << ", ";
2314 if (I->hasName() || !Prototype)
2315 ArgName = GetValueName(I);
2318 const Type *ArgTy = I->getType();
2319 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2320 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2321 ByValParams.insert(I);
2323 printType(FunctionInnards, ArgTy,
2324 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt),
2331 // Loop over the arguments, printing them.
2332 FunctionType::param_iterator I = FT->param_begin(), E = FT->param_end();
2335 // If this is a struct-return function, don't print the hidden
2336 // struct-return argument.
2337 if (isStructReturn) {
2338 assert(I != E && "Invalid struct return function!");
2343 for (; I != E; ++I) {
2344 if (PrintedArg) FunctionInnards << ", ";
2345 const Type *ArgTy = *I;
2346 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2347 assert(isa<PointerType>(ArgTy));
2348 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2350 printType(FunctionInnards, ArgTy,
2351 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt));
2357 // Finish printing arguments... if this is a vararg function, print the ...,
2358 // unless there are no known types, in which case, we just emit ().
2360 if (FT->isVarArg() && PrintedArg) {
2361 if (PrintedArg) FunctionInnards << ", ";
2362 FunctionInnards << "..."; // Output varargs portion of signature!
2363 } else if (!FT->isVarArg() && !PrintedArg) {
2364 FunctionInnards << "void"; // ret() -> ret(void) in C.
2366 FunctionInnards << ')';
2368 // Get the return tpe for the function.
2370 if (!isStructReturn)
2371 RetTy = F->getReturnType();
2373 // If this is a struct-return function, print the struct-return type.
2374 RetTy = cast<PointerType>(FT->getParamType(0))->getElementType();
2377 // Print out the return type and the signature built above.
2378 printType(Out, RetTy,
2379 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt),
2380 FunctionInnards.str());
2383 static inline bool isFPIntBitCast(const Instruction &I) {
2384 if (!isa<BitCastInst>(I))
2386 const Type *SrcTy = I.getOperand(0)->getType();
2387 const Type *DstTy = I.getType();
2388 return (SrcTy->isFloatingPoint() && DstTy->isInteger()) ||
2389 (DstTy->isFloatingPoint() && SrcTy->isInteger());
2392 void CWriter::printFunction(Function &F) {
2393 /// isStructReturn - Should this function actually return a struct by-value?
2394 bool isStructReturn = F.hasStructRetAttr();
2396 printFunctionSignature(&F, false);
2399 // If this is a struct return function, handle the result with magic.
2400 if (isStructReturn) {
2401 const Type *StructTy =
2402 cast<PointerType>(F.arg_begin()->getType())->getElementType();
2404 printType(Out, StructTy, false, "StructReturn");
2405 Out << "; /* Struct return temporary */\n";
2408 printType(Out, F.arg_begin()->getType(), false,
2409 GetValueName(F.arg_begin()));
2410 Out << " = &StructReturn;\n";
2413 bool PrintedVar = false;
2415 // print local variable information for the function
2416 for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I) {
2417 if (const AllocaInst *AI = isDirectAlloca(&*I)) {
2419 printType(Out, AI->getAllocatedType(), false, GetValueName(AI));
2420 Out << "; /* Address-exposed local */\n";
2422 } else if (I->getType() != Type::getVoidTy(F.getContext()) &&
2423 !isInlinableInst(*I)) {
2425 printType(Out, I->getType(), false, GetValueName(&*I));
2428 if (isa<PHINode>(*I)) { // Print out PHI node temporaries as well...
2430 printType(Out, I->getType(), false,
2431 GetValueName(&*I)+"__PHI_TEMPORARY");
2436 // We need a temporary for the BitCast to use so it can pluck a value out
2437 // of a union to do the BitCast. This is separate from the need for a
2438 // variable to hold the result of the BitCast.
2439 if (isFPIntBitCast(*I)) {
2440 Out << " llvmBitCastUnion " << GetValueName(&*I)
2441 << "__BITCAST_TEMPORARY;\n";
2449 if (F.hasExternalLinkage() && F.getName() == "main")
2450 Out << " CODE_FOR_MAIN();\n";
2452 // print the basic blocks
2453 for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
2454 if (Loop *L = LI->getLoopFor(BB)) {
2455 if (L->getHeader() == BB && L->getParentLoop() == 0)
2458 printBasicBlock(BB);
2465 void CWriter::printLoop(Loop *L) {
2466 Out << " do { /* Syntactic loop '" << L->getHeader()->getName()
2467 << "' to make GCC happy */\n";
2468 for (unsigned i = 0, e = L->getBlocks().size(); i != e; ++i) {
2469 BasicBlock *BB = L->getBlocks()[i];
2470 Loop *BBLoop = LI->getLoopFor(BB);
2472 printBasicBlock(BB);
2473 else if (BB == BBLoop->getHeader() && BBLoop->getParentLoop() == L)
2476 Out << " } while (1); /* end of syntactic loop '"
2477 << L->getHeader()->getName() << "' */\n";
2480 void CWriter::printBasicBlock(BasicBlock *BB) {
2482 // Don't print the label for the basic block if there are no uses, or if
2483 // the only terminator use is the predecessor basic block's terminator.
2484 // We have to scan the use list because PHI nodes use basic blocks too but
2485 // do not require a label to be generated.
2487 bool NeedsLabel = false;
2488 for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI)
2489 if (isGotoCodeNecessary(*PI, BB)) {
2494 if (NeedsLabel) Out << GetValueName(BB) << ":\n";
2496 // Output all of the instructions in the basic block...
2497 for (BasicBlock::iterator II = BB->begin(), E = --BB->end(); II != E;
2499 if (!isInlinableInst(*II) && !isDirectAlloca(II)) {
2500 if (II->getType() != Type::getVoidTy(BB->getContext()) &&
2505 writeInstComputationInline(*II);
2510 // Don't emit prefix or suffix for the terminator.
2511 visit(*BB->getTerminator());
2515 // Specific Instruction type classes... note that all of the casts are
2516 // necessary because we use the instruction classes as opaque types...
2518 void CWriter::visitReturnInst(ReturnInst &I) {
2519 // If this is a struct return function, return the temporary struct.
2520 bool isStructReturn = I.getParent()->getParent()->hasStructRetAttr();
2522 if (isStructReturn) {
2523 Out << " return StructReturn;\n";
2527 // Don't output a void return if this is the last basic block in the function
2528 if (I.getNumOperands() == 0 &&
2529 &*--I.getParent()->getParent()->end() == I.getParent() &&
2530 !I.getParent()->size() == 1) {
2534 if (I.getNumOperands() > 1) {
2537 printType(Out, I.getParent()->getParent()->getReturnType());
2538 Out << " llvm_cbe_mrv_temp = {\n";
2539 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
2541 writeOperand(I.getOperand(i));
2547 Out << " return llvm_cbe_mrv_temp;\n";
2553 if (I.getNumOperands()) {
2555 writeOperand(I.getOperand(0));
2560 void CWriter::visitSwitchInst(SwitchInst &SI) {
2563 writeOperand(SI.getOperand(0));
2564 Out << ") {\n default:\n";
2565 printPHICopiesForSuccessor (SI.getParent(), SI.getDefaultDest(), 2);
2566 printBranchToBlock(SI.getParent(), SI.getDefaultDest(), 2);
2568 for (unsigned i = 2, e = SI.getNumOperands(); i != e; i += 2) {
2570 writeOperand(SI.getOperand(i));
2572 BasicBlock *Succ = cast<BasicBlock>(SI.getOperand(i+1));
2573 printPHICopiesForSuccessor (SI.getParent(), Succ, 2);
2574 printBranchToBlock(SI.getParent(), Succ, 2);
2575 if (Function::iterator(Succ) == next(Function::iterator(SI.getParent())))
2581 void CWriter::visitUnreachableInst(UnreachableInst &I) {
2582 Out << " /*UNREACHABLE*/;\n";
2585 bool CWriter::isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
2586 /// FIXME: This should be reenabled, but loop reordering safe!!
2589 if (next(Function::iterator(From)) != Function::iterator(To))
2590 return true; // Not the direct successor, we need a goto.
2592 //isa<SwitchInst>(From->getTerminator())
2594 if (LI->getLoopFor(From) != LI->getLoopFor(To))
2599 void CWriter::printPHICopiesForSuccessor (BasicBlock *CurBlock,
2600 BasicBlock *Successor,
2602 for (BasicBlock::iterator I = Successor->begin(); isa<PHINode>(I); ++I) {
2603 PHINode *PN = cast<PHINode>(I);
2604 // Now we have to do the printing.
2605 Value *IV = PN->getIncomingValueForBlock(CurBlock);
2606 if (!isa<UndefValue>(IV)) {
2607 Out << std::string(Indent, ' ');
2608 Out << " " << GetValueName(I) << "__PHI_TEMPORARY = ";
2610 Out << "; /* for PHI node */\n";
2615 void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
2617 if (isGotoCodeNecessary(CurBB, Succ)) {
2618 Out << std::string(Indent, ' ') << " goto ";
2624 // Branch instruction printing - Avoid printing out a branch to a basic block
2625 // that immediately succeeds the current one.
2627 void CWriter::visitBranchInst(BranchInst &I) {
2629 if (I.isConditional()) {
2630 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(0))) {
2632 writeOperand(I.getCondition());
2635 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 2);
2636 printBranchToBlock(I.getParent(), I.getSuccessor(0), 2);
2638 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(1))) {
2639 Out << " } else {\n";
2640 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2641 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2644 // First goto not necessary, assume second one is...
2646 writeOperand(I.getCondition());
2649 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2650 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2655 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 0);
2656 printBranchToBlock(I.getParent(), I.getSuccessor(0), 0);
2661 // PHI nodes get copied into temporary values at the end of predecessor basic
2662 // blocks. We now need to copy these temporary values into the REAL value for
2664 void CWriter::visitPHINode(PHINode &I) {
2666 Out << "__PHI_TEMPORARY";
2670 void CWriter::visitBinaryOperator(Instruction &I) {
2671 // binary instructions, shift instructions, setCond instructions.
2672 assert(!isa<PointerType>(I.getType()));
2674 // We must cast the results of binary operations which might be promoted.
2675 bool needsCast = false;
2676 if ((I.getType() == Type::getInt8Ty(I.getContext())) ||
2677 (I.getType() == Type::getInt16Ty(I.getContext()))
2678 || (I.getType() == Type::getFloatTy(I.getContext()))) {
2681 printType(Out, I.getType(), false);
2685 // If this is a negation operation, print it out as such. For FP, we don't
2686 // want to print "-0.0 - X".
2687 if (BinaryOperator::isNeg(&I)) {
2689 writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
2691 } else if (BinaryOperator::isFNeg(&I)) {
2693 writeOperand(BinaryOperator::getFNegArgument(cast<BinaryOperator>(&I)));
2695 } else if (I.getOpcode() == Instruction::FRem) {
2696 // Output a call to fmod/fmodf instead of emitting a%b
2697 if (I.getType() == Type::getFloatTy(I.getContext()))
2699 else if (I.getType() == Type::getDoubleTy(I.getContext()))
2701 else // all 3 flavors of long double
2703 writeOperand(I.getOperand(0));
2705 writeOperand(I.getOperand(1));
2709 // Write out the cast of the instruction's value back to the proper type
2711 bool NeedsClosingParens = writeInstructionCast(I);
2713 // Certain instructions require the operand to be forced to a specific type
2714 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2715 // below for operand 1
2716 writeOperandWithCast(I.getOperand(0), I.getOpcode());
2718 switch (I.getOpcode()) {
2719 case Instruction::Add:
2720 case Instruction::FAdd: Out << " + "; break;
2721 case Instruction::Sub:
2722 case Instruction::FSub: Out << " - "; break;
2723 case Instruction::Mul:
2724 case Instruction::FMul: Out << " * "; break;
2725 case Instruction::URem:
2726 case Instruction::SRem:
2727 case Instruction::FRem: Out << " % "; break;
2728 case Instruction::UDiv:
2729 case Instruction::SDiv:
2730 case Instruction::FDiv: Out << " / "; break;
2731 case Instruction::And: Out << " & "; break;
2732 case Instruction::Or: Out << " | "; break;
2733 case Instruction::Xor: Out << " ^ "; break;
2734 case Instruction::Shl : Out << " << "; break;
2735 case Instruction::LShr:
2736 case Instruction::AShr: Out << " >> "; break;
2739 errs() << "Invalid operator type!" << I;
2741 llvm_unreachable(0);
2744 writeOperandWithCast(I.getOperand(1), I.getOpcode());
2745 if (NeedsClosingParens)
2754 void CWriter::visitICmpInst(ICmpInst &I) {
2755 // We must cast the results of icmp which might be promoted.
2756 bool needsCast = false;
2758 // Write out the cast of the instruction's value back to the proper type
2760 bool NeedsClosingParens = writeInstructionCast(I);
2762 // Certain icmp predicate require the operand to be forced to a specific type
2763 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2764 // below for operand 1
2765 writeOperandWithCast(I.getOperand(0), I);
2767 switch (I.getPredicate()) {
2768 case ICmpInst::ICMP_EQ: Out << " == "; break;
2769 case ICmpInst::ICMP_NE: Out << " != "; break;
2770 case ICmpInst::ICMP_ULE:
2771 case ICmpInst::ICMP_SLE: Out << " <= "; break;
2772 case ICmpInst::ICMP_UGE:
2773 case ICmpInst::ICMP_SGE: Out << " >= "; break;
2774 case ICmpInst::ICMP_ULT:
2775 case ICmpInst::ICMP_SLT: Out << " < "; break;
2776 case ICmpInst::ICMP_UGT:
2777 case ICmpInst::ICMP_SGT: Out << " > "; break;
2780 errs() << "Invalid icmp predicate!" << I;
2782 llvm_unreachable(0);
2785 writeOperandWithCast(I.getOperand(1), I);
2786 if (NeedsClosingParens)
2794 void CWriter::visitFCmpInst(FCmpInst &I) {
2795 if (I.getPredicate() == FCmpInst::FCMP_FALSE) {
2799 if (I.getPredicate() == FCmpInst::FCMP_TRUE) {
2805 switch (I.getPredicate()) {
2806 default: llvm_unreachable("Illegal FCmp predicate");
2807 case FCmpInst::FCMP_ORD: op = "ord"; break;
2808 case FCmpInst::FCMP_UNO: op = "uno"; break;
2809 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
2810 case FCmpInst::FCMP_UNE: op = "une"; break;
2811 case FCmpInst::FCMP_ULT: op = "ult"; break;
2812 case FCmpInst::FCMP_ULE: op = "ule"; break;
2813 case FCmpInst::FCMP_UGT: op = "ugt"; break;
2814 case FCmpInst::FCMP_UGE: op = "uge"; break;
2815 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
2816 case FCmpInst::FCMP_ONE: op = "one"; break;
2817 case FCmpInst::FCMP_OLT: op = "olt"; break;
2818 case FCmpInst::FCMP_OLE: op = "ole"; break;
2819 case FCmpInst::FCMP_OGT: op = "ogt"; break;
2820 case FCmpInst::FCMP_OGE: op = "oge"; break;
2823 Out << "llvm_fcmp_" << op << "(";
2824 // Write the first operand
2825 writeOperand(I.getOperand(0));
2827 // Write the second operand
2828 writeOperand(I.getOperand(1));
2832 static const char * getFloatBitCastField(const Type *Ty) {
2833 switch (Ty->getTypeID()) {
2834 default: llvm_unreachable("Invalid Type");
2835 case Type::FloatTyID: return "Float";
2836 case Type::DoubleTyID: return "Double";
2837 case Type::IntegerTyID: {
2838 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
2847 void CWriter::visitCastInst(CastInst &I) {
2848 const Type *DstTy = I.getType();
2849 const Type *SrcTy = I.getOperand(0)->getType();
2850 if (isFPIntBitCast(I)) {
2852 // These int<->float and long<->double casts need to be handled specially
2853 Out << GetValueName(&I) << "__BITCAST_TEMPORARY."
2854 << getFloatBitCastField(I.getOperand(0)->getType()) << " = ";
2855 writeOperand(I.getOperand(0));
2856 Out << ", " << GetValueName(&I) << "__BITCAST_TEMPORARY."
2857 << getFloatBitCastField(I.getType());
2863 printCast(I.getOpcode(), SrcTy, DstTy);
2865 // Make a sext from i1 work by subtracting the i1 from 0 (an int).
2866 if (SrcTy == Type::getInt1Ty(I.getContext()) &&
2867 I.getOpcode() == Instruction::SExt)
2870 writeOperand(I.getOperand(0));
2872 if (DstTy == Type::getInt1Ty(I.getContext()) &&
2873 (I.getOpcode() == Instruction::Trunc ||
2874 I.getOpcode() == Instruction::FPToUI ||
2875 I.getOpcode() == Instruction::FPToSI ||
2876 I.getOpcode() == Instruction::PtrToInt)) {
2877 // Make sure we really get a trunc to bool by anding the operand with 1
2883 void CWriter::visitSelectInst(SelectInst &I) {
2885 writeOperand(I.getCondition());
2887 writeOperand(I.getTrueValue());
2889 writeOperand(I.getFalseValue());
2894 void CWriter::lowerIntrinsics(Function &F) {
2895 // This is used to keep track of intrinsics that get generated to a lowered
2896 // function. We must generate the prototypes before the function body which
2897 // will only be expanded on first use (by the loop below).
2898 std::vector<Function*> prototypesToGen;
2900 // Examine all the instructions in this function to find the intrinsics that
2901 // need to be lowered.
2902 for (Function::iterator BB = F.begin(), EE = F.end(); BB != EE; ++BB)
2903 for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; )
2904 if (CallInst *CI = dyn_cast<CallInst>(I++))
2905 if (Function *F = CI->getCalledFunction())
2906 switch (F->getIntrinsicID()) {
2907 case Intrinsic::not_intrinsic:
2908 case Intrinsic::memory_barrier:
2909 case Intrinsic::vastart:
2910 case Intrinsic::vacopy:
2911 case Intrinsic::vaend:
2912 case Intrinsic::returnaddress:
2913 case Intrinsic::frameaddress:
2914 case Intrinsic::setjmp:
2915 case Intrinsic::longjmp:
2916 case Intrinsic::prefetch:
2917 case Intrinsic::dbg_stoppoint:
2918 case Intrinsic::powi:
2919 case Intrinsic::x86_sse_cmp_ss:
2920 case Intrinsic::x86_sse_cmp_ps:
2921 case Intrinsic::x86_sse2_cmp_sd:
2922 case Intrinsic::x86_sse2_cmp_pd:
2923 case Intrinsic::ppc_altivec_lvsl:
2924 // We directly implement these intrinsics
2927 // If this is an intrinsic that directly corresponds to a GCC
2928 // builtin, we handle it.
2929 const char *BuiltinName = "";
2930 #define GET_GCC_BUILTIN_NAME
2931 #include "llvm/Intrinsics.gen"
2932 #undef GET_GCC_BUILTIN_NAME
2933 // If we handle it, don't lower it.
2934 if (BuiltinName[0]) break;
2936 // All other intrinsic calls we must lower.
2937 Instruction *Before = 0;
2938 if (CI != &BB->front())
2939 Before = prior(BasicBlock::iterator(CI));
2941 IL->LowerIntrinsicCall(CI);
2942 if (Before) { // Move iterator to instruction after call
2947 // If the intrinsic got lowered to another call, and that call has
2948 // a definition then we need to make sure its prototype is emitted
2949 // before any calls to it.
2950 if (CallInst *Call = dyn_cast<CallInst>(I))
2951 if (Function *NewF = Call->getCalledFunction())
2952 if (!NewF->isDeclaration())
2953 prototypesToGen.push_back(NewF);
2958 // We may have collected some prototypes to emit in the loop above.
2959 // Emit them now, before the function that uses them is emitted. But,
2960 // be careful not to emit them twice.
2961 std::vector<Function*>::iterator I = prototypesToGen.begin();
2962 std::vector<Function*>::iterator E = prototypesToGen.end();
2963 for ( ; I != E; ++I) {
2964 if (intrinsicPrototypesAlreadyGenerated.insert(*I).second) {
2966 printFunctionSignature(*I, true);
2972 void CWriter::visitCallInst(CallInst &I) {
2973 if (isa<InlineAsm>(I.getOperand(0)))
2974 return visitInlineAsm(I);
2976 bool WroteCallee = false;
2978 // Handle intrinsic function calls first...
2979 if (Function *F = I.getCalledFunction())
2980 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
2981 if (visitBuiltinCall(I, ID, WroteCallee))
2984 Value *Callee = I.getCalledValue();
2986 const PointerType *PTy = cast<PointerType>(Callee->getType());
2987 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
2989 // If this is a call to a struct-return function, assign to the first
2990 // parameter instead of passing it to the call.
2991 const AttrListPtr &PAL = I.getAttributes();
2992 bool hasByVal = I.hasByValArgument();
2993 bool isStructRet = I.hasStructRetAttr();
2995 writeOperandDeref(I.getOperand(1));
2999 if (I.isTailCall()) Out << " /*tail*/ ";
3002 // If this is an indirect call to a struct return function, we need to cast
3003 // the pointer. Ditto for indirect calls with byval arguments.
3004 bool NeedsCast = (hasByVal || isStructRet) && !isa<Function>(Callee);
3006 // GCC is a real PITA. It does not permit codegening casts of functions to
3007 // function pointers if they are in a call (it generates a trap instruction
3008 // instead!). We work around this by inserting a cast to void* in between
3009 // the function and the function pointer cast. Unfortunately, we can't just
3010 // form the constant expression here, because the folder will immediately
3013 // Note finally, that this is completely unsafe. ANSI C does not guarantee
3014 // that void* and function pointers have the same size. :( To deal with this
3015 // in the common case, we handle casts where the number of arguments passed
3018 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Callee))
3020 if (Function *RF = dyn_cast<Function>(CE->getOperand(0))) {
3026 // Ok, just cast the pointer type.
3029 printStructReturnPointerFunctionType(Out, PAL,
3030 cast<PointerType>(I.getCalledValue()->getType()));
3032 printType(Out, I.getCalledValue()->getType(), false, "", true, PAL);
3034 printType(Out, I.getCalledValue()->getType());
3037 writeOperand(Callee);
3038 if (NeedsCast) Out << ')';
3043 unsigned NumDeclaredParams = FTy->getNumParams();
3045 CallSite::arg_iterator AI = I.op_begin()+1, AE = I.op_end();
3047 if (isStructRet) { // Skip struct return argument.
3052 bool PrintedArg = false;
3053 for (; AI != AE; ++AI, ++ArgNo) {
3054 if (PrintedArg) Out << ", ";
3055 if (ArgNo < NumDeclaredParams &&
3056 (*AI)->getType() != FTy->getParamType(ArgNo)) {
3058 printType(Out, FTy->getParamType(ArgNo),
3059 /*isSigned=*/PAL.paramHasAttr(ArgNo+1, Attribute::SExt));
3062 // Check if the argument is expected to be passed by value.
3063 if (I.paramHasAttr(ArgNo+1, Attribute::ByVal))
3064 writeOperandDeref(*AI);
3072 /// visitBuiltinCall - Handle the call to the specified builtin. Returns true
3073 /// if the entire call is handled, return false it it wasn't handled, and
3074 /// optionally set 'WroteCallee' if the callee has already been printed out.
3075 bool CWriter::visitBuiltinCall(CallInst &I, Intrinsic::ID ID,
3076 bool &WroteCallee) {
3079 // If this is an intrinsic that directly corresponds to a GCC
3080 // builtin, we emit it here.
3081 const char *BuiltinName = "";
3082 Function *F = I.getCalledFunction();
3083 #define GET_GCC_BUILTIN_NAME
3084 #include "llvm/Intrinsics.gen"
3085 #undef GET_GCC_BUILTIN_NAME
3086 assert(BuiltinName[0] && "Unknown LLVM intrinsic!");
3092 case Intrinsic::memory_barrier:
3093 Out << "__sync_synchronize()";
3095 case Intrinsic::vastart:
3098 Out << "va_start(*(va_list*)";
3099 writeOperand(I.getOperand(1));
3101 // Output the last argument to the enclosing function.
3102 if (I.getParent()->getParent()->arg_empty()) {
3104 raw_string_ostream Msg(msg);
3105 Msg << "The C backend does not currently support zero "
3106 << "argument varargs functions, such as '"
3107 << I.getParent()->getParent()->getName() << "'!";
3108 llvm_report_error(Msg.str());
3110 writeOperand(--I.getParent()->getParent()->arg_end());
3113 case Intrinsic::vaend:
3114 if (!isa<ConstantPointerNull>(I.getOperand(1))) {
3115 Out << "0; va_end(*(va_list*)";
3116 writeOperand(I.getOperand(1));
3119 Out << "va_end(*(va_list*)0)";
3122 case Intrinsic::vacopy:
3124 Out << "va_copy(*(va_list*)";
3125 writeOperand(I.getOperand(1));
3126 Out << ", *(va_list*)";
3127 writeOperand(I.getOperand(2));
3130 case Intrinsic::returnaddress:
3131 Out << "__builtin_return_address(";
3132 writeOperand(I.getOperand(1));
3135 case Intrinsic::frameaddress:
3136 Out << "__builtin_frame_address(";
3137 writeOperand(I.getOperand(1));
3140 case Intrinsic::powi:
3141 Out << "__builtin_powi(";
3142 writeOperand(I.getOperand(1));
3144 writeOperand(I.getOperand(2));
3147 case Intrinsic::setjmp:
3148 Out << "setjmp(*(jmp_buf*)";
3149 writeOperand(I.getOperand(1));
3152 case Intrinsic::longjmp:
3153 Out << "longjmp(*(jmp_buf*)";
3154 writeOperand(I.getOperand(1));
3156 writeOperand(I.getOperand(2));
3159 case Intrinsic::prefetch:
3160 Out << "LLVM_PREFETCH((const void *)";
3161 writeOperand(I.getOperand(1));
3163 writeOperand(I.getOperand(2));
3165 writeOperand(I.getOperand(3));
3168 case Intrinsic::stacksave:
3169 // Emit this as: Val = 0; *((void**)&Val) = __builtin_stack_save()
3170 // to work around GCC bugs (see PR1809).
3171 Out << "0; *((void**)&" << GetValueName(&I)
3172 << ") = __builtin_stack_save()";
3174 case Intrinsic::dbg_stoppoint: {
3175 // If we use writeOperand directly we get a "u" suffix which is rejected
3177 DbgStopPointInst &SPI = cast<DbgStopPointInst>(I);
3179 GetConstantStringInfo(SPI.getDirectory(), dir);
3181 GetConstantStringInfo(SPI.getFileName(), file);
3185 << dir << '/' << file << "\"\n";
3188 case Intrinsic::x86_sse_cmp_ss:
3189 case Intrinsic::x86_sse_cmp_ps:
3190 case Intrinsic::x86_sse2_cmp_sd:
3191 case Intrinsic::x86_sse2_cmp_pd:
3193 printType(Out, I.getType());
3195 // Multiple GCC builtins multiplex onto this intrinsic.
3196 switch (cast<ConstantInt>(I.getOperand(3))->getZExtValue()) {
3197 default: llvm_unreachable("Invalid llvm.x86.sse.cmp!");
3198 case 0: Out << "__builtin_ia32_cmpeq"; break;
3199 case 1: Out << "__builtin_ia32_cmplt"; break;
3200 case 2: Out << "__builtin_ia32_cmple"; break;
3201 case 3: Out << "__builtin_ia32_cmpunord"; break;
3202 case 4: Out << "__builtin_ia32_cmpneq"; break;
3203 case 5: Out << "__builtin_ia32_cmpnlt"; break;
3204 case 6: Out << "__builtin_ia32_cmpnle"; break;
3205 case 7: Out << "__builtin_ia32_cmpord"; break;
3207 if (ID == Intrinsic::x86_sse_cmp_ps || ID == Intrinsic::x86_sse2_cmp_pd)
3211 if (ID == Intrinsic::x86_sse_cmp_ss || ID == Intrinsic::x86_sse_cmp_ps)
3217 writeOperand(I.getOperand(1));
3219 writeOperand(I.getOperand(2));
3222 case Intrinsic::ppc_altivec_lvsl:
3224 printType(Out, I.getType());
3226 Out << "__builtin_altivec_lvsl(0, (void*)";
3227 writeOperand(I.getOperand(1));
3233 //This converts the llvm constraint string to something gcc is expecting.
3234 //TODO: work out platform independent constraints and factor those out
3235 // of the per target tables
3236 // handle multiple constraint codes
3237 std::string CWriter::InterpretASMConstraint(InlineAsm::ConstraintInfo& c) {
3239 assert(c.Codes.size() == 1 && "Too many asm constraint codes to handle");
3241 const char *const *table = 0;
3243 // Grab the translation table from MCAsmInfo if it exists.
3245 std::string Triple = TheModule->getTargetTriple();
3247 Triple = llvm::sys::getHostTriple();
3250 if (const Target *Match = TargetRegistry::lookupTarget(Triple, E))
3251 TAsm = Match->createAsmInfo(Triple);
3254 table = TAsm->getAsmCBE();
3256 // Search the translation table if it exists.
3257 for (int i = 0; table && table[i]; i += 2)
3258 if (c.Codes[0] == table[i])
3261 // Default is identity.
3265 //TODO: import logic from AsmPrinter.cpp
3266 static std::string gccifyAsm(std::string asmstr) {
3267 for (std::string::size_type i = 0; i != asmstr.size(); ++i)
3268 if (asmstr[i] == '\n')
3269 asmstr.replace(i, 1, "\\n");
3270 else if (asmstr[i] == '\t')
3271 asmstr.replace(i, 1, "\\t");
3272 else if (asmstr[i] == '$') {
3273 if (asmstr[i + 1] == '{') {
3274 std::string::size_type a = asmstr.find_first_of(':', i + 1);
3275 std::string::size_type b = asmstr.find_first_of('}', i + 1);
3276 std::string n = "%" +
3277 asmstr.substr(a + 1, b - a - 1) +
3278 asmstr.substr(i + 2, a - i - 2);
3279 asmstr.replace(i, b - i + 1, n);
3282 asmstr.replace(i, 1, "%");
3284 else if (asmstr[i] == '%')//grr
3285 { asmstr.replace(i, 1, "%%"); ++i;}
3290 //TODO: assumptions about what consume arguments from the call are likely wrong
3291 // handle communitivity
3292 void CWriter::visitInlineAsm(CallInst &CI) {
3293 InlineAsm* as = cast<InlineAsm>(CI.getOperand(0));
3294 std::vector<InlineAsm::ConstraintInfo> Constraints = as->ParseConstraints();
3296 std::vector<std::pair<Value*, int> > ResultVals;
3297 if (CI.getType() == Type::getVoidTy(CI.getContext()))
3299 else if (const StructType *ST = dyn_cast<StructType>(CI.getType())) {
3300 for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i)
3301 ResultVals.push_back(std::make_pair(&CI, (int)i));
3303 ResultVals.push_back(std::make_pair(&CI, -1));
3306 // Fix up the asm string for gcc and emit it.
3307 Out << "__asm__ volatile (\"" << gccifyAsm(as->getAsmString()) << "\"\n";
3310 unsigned ValueCount = 0;
3311 bool IsFirst = true;
3313 // Convert over all the output constraints.
3314 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3315 E = Constraints.end(); I != E; ++I) {
3317 if (I->Type != InlineAsm::isOutput) {
3319 continue; // Ignore non-output constraints.
3322 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3323 std::string C = InterpretASMConstraint(*I);
3324 if (C.empty()) continue;
3335 if (ValueCount < ResultVals.size()) {
3336 DestVal = ResultVals[ValueCount].first;
3337 DestValNo = ResultVals[ValueCount].second;
3339 DestVal = CI.getOperand(ValueCount-ResultVals.size()+1);
3341 if (I->isEarlyClobber)
3344 Out << "\"=" << C << "\"(" << GetValueName(DestVal);
3345 if (DestValNo != -1)
3346 Out << ".field" << DestValNo; // Multiple retvals.
3352 // Convert over all the input constraints.
3356 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3357 E = Constraints.end(); I != E; ++I) {
3358 if (I->Type != InlineAsm::isInput) {
3360 continue; // Ignore non-input constraints.
3363 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3364 std::string C = InterpretASMConstraint(*I);
3365 if (C.empty()) continue;
3372 assert(ValueCount >= ResultVals.size() && "Input can't refer to result");
3373 Value *SrcVal = CI.getOperand(ValueCount-ResultVals.size()+1);
3375 Out << "\"" << C << "\"(";
3377 writeOperand(SrcVal);
3379 writeOperandDeref(SrcVal);
3383 // Convert over the clobber constraints.
3386 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3387 E = Constraints.end(); I != E; ++I) {
3388 if (I->Type != InlineAsm::isClobber)
3389 continue; // Ignore non-input constraints.
3391 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3392 std::string C = InterpretASMConstraint(*I);
3393 if (C.empty()) continue;
3400 Out << '\"' << C << '"';
3406 void CWriter::visitAllocaInst(AllocaInst &I) {
3408 printType(Out, I.getType());
3409 Out << ") alloca(sizeof(";
3410 printType(Out, I.getType()->getElementType());
3412 if (I.isArrayAllocation()) {
3414 writeOperand(I.getOperand(0));
3419 void CWriter::printGEPExpression(Value *Ptr, gep_type_iterator I,
3420 gep_type_iterator E, bool Static) {
3422 // If there are no indices, just print out the pointer.
3428 // Find out if the last index is into a vector. If so, we have to print this
3429 // specially. Since vectors can't have elements of indexable type, only the
3430 // last index could possibly be of a vector element.
3431 const VectorType *LastIndexIsVector = 0;
3433 for (gep_type_iterator TmpI = I; TmpI != E; ++TmpI)
3434 LastIndexIsVector = dyn_cast<VectorType>(*TmpI);
3439 // If the last index is into a vector, we can't print it as &a[i][j] because
3440 // we can't index into a vector with j in GCC. Instead, emit this as
3441 // (((float*)&a[i])+j)
3442 if (LastIndexIsVector) {
3444 printType(Out, PointerType::getUnqual(LastIndexIsVector->getElementType()));
3450 // If the first index is 0 (very typical) we can do a number of
3451 // simplifications to clean up the code.
3452 Value *FirstOp = I.getOperand();
3453 if (!isa<Constant>(FirstOp) || !cast<Constant>(FirstOp)->isNullValue()) {
3454 // First index isn't simple, print it the hard way.
3457 ++I; // Skip the zero index.
3459 // Okay, emit the first operand. If Ptr is something that is already address
3460 // exposed, like a global, avoid emitting (&foo)[0], just emit foo instead.
3461 if (isAddressExposed(Ptr)) {
3462 writeOperandInternal(Ptr, Static);
3463 } else if (I != E && isa<StructType>(*I)) {
3464 // If we didn't already emit the first operand, see if we can print it as
3465 // P->f instead of "P[0].f"
3467 Out << "->field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3468 ++I; // eat the struct index as well.
3470 // Instead of emitting P[0][1], emit (*P)[1], which is more idiomatic.
3477 for (; I != E; ++I) {
3478 if (isa<StructType>(*I)) {
3479 Out << ".field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3480 } else if (isa<ArrayType>(*I)) {
3482 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3484 } else if (!isa<VectorType>(*I)) {
3486 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3489 // If the last index is into a vector, then print it out as "+j)". This
3490 // works with the 'LastIndexIsVector' code above.
3491 if (isa<Constant>(I.getOperand()) &&
3492 cast<Constant>(I.getOperand())->isNullValue()) {
3493 Out << "))"; // avoid "+0".
3496 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3504 void CWriter::writeMemoryAccess(Value *Operand, const Type *OperandType,
3505 bool IsVolatile, unsigned Alignment) {
3507 bool IsUnaligned = Alignment &&
3508 Alignment < TD->getABITypeAlignment(OperandType);
3512 if (IsVolatile || IsUnaligned) {
3515 Out << "struct __attribute__ ((packed, aligned(" << Alignment << "))) {";
3516 printType(Out, OperandType, false, IsUnaligned ? "data" : "volatile*");
3519 if (IsVolatile) Out << "volatile ";
3525 writeOperand(Operand);
3527 if (IsVolatile || IsUnaligned) {
3534 void CWriter::visitLoadInst(LoadInst &I) {
3535 writeMemoryAccess(I.getOperand(0), I.getType(), I.isVolatile(),
3540 void CWriter::visitStoreInst(StoreInst &I) {
3541 writeMemoryAccess(I.getPointerOperand(), I.getOperand(0)->getType(),
3542 I.isVolatile(), I.getAlignment());
3544 Value *Operand = I.getOperand(0);
3545 Constant *BitMask = 0;
3546 if (const IntegerType* ITy = dyn_cast<IntegerType>(Operand->getType()))
3547 if (!ITy->isPowerOf2ByteWidth())
3548 // We have a bit width that doesn't match an even power-of-2 byte
3549 // size. Consequently we must & the value with the type's bit mask
3550 BitMask = ConstantInt::get(ITy, ITy->getBitMask());
3553 writeOperand(Operand);
3556 printConstant(BitMask, false);
3561 void CWriter::visitGetElementPtrInst(GetElementPtrInst &I) {
3562 printGEPExpression(I.getPointerOperand(), gep_type_begin(I),
3563 gep_type_end(I), false);
3566 void CWriter::visitVAArgInst(VAArgInst &I) {
3567 Out << "va_arg(*(va_list*)";
3568 writeOperand(I.getOperand(0));
3570 printType(Out, I.getType());
3574 void CWriter::visitInsertElementInst(InsertElementInst &I) {
3575 const Type *EltTy = I.getType()->getElementType();
3576 writeOperand(I.getOperand(0));
3579 printType(Out, PointerType::getUnqual(EltTy));
3580 Out << ")(&" << GetValueName(&I) << "))[";
3581 writeOperand(I.getOperand(2));
3583 writeOperand(I.getOperand(1));
3587 void CWriter::visitExtractElementInst(ExtractElementInst &I) {
3588 // We know that our operand is not inlined.
3591 cast<VectorType>(I.getOperand(0)->getType())->getElementType();
3592 printType(Out, PointerType::getUnqual(EltTy));
3593 Out << ")(&" << GetValueName(I.getOperand(0)) << "))[";
3594 writeOperand(I.getOperand(1));
3598 void CWriter::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
3600 printType(Out, SVI.getType());
3602 const VectorType *VT = SVI.getType();
3603 unsigned NumElts = VT->getNumElements();
3604 const Type *EltTy = VT->getElementType();
3606 for (unsigned i = 0; i != NumElts; ++i) {
3608 int SrcVal = SVI.getMaskValue(i);
3609 if ((unsigned)SrcVal >= NumElts*2) {
3610 Out << " 0/*undef*/ ";
3612 Value *Op = SVI.getOperand((unsigned)SrcVal >= NumElts);
3613 if (isa<Instruction>(Op)) {
3614 // Do an extractelement of this value from the appropriate input.
3616 printType(Out, PointerType::getUnqual(EltTy));
3617 Out << ")(&" << GetValueName(Op)
3618 << "))[" << (SrcVal & (NumElts-1)) << "]";
3619 } else if (isa<ConstantAggregateZero>(Op) || isa<UndefValue>(Op)) {
3622 printConstant(cast<ConstantVector>(Op)->getOperand(SrcVal &
3631 void CWriter::visitInsertValueInst(InsertValueInst &IVI) {
3632 // Start by copying the entire aggregate value into the result variable.
3633 writeOperand(IVI.getOperand(0));
3636 // Then do the insert to update the field.
3637 Out << GetValueName(&IVI);
3638 for (const unsigned *b = IVI.idx_begin(), *i = b, *e = IVI.idx_end();
3640 const Type *IndexedTy =
3641 ExtractValueInst::getIndexedType(IVI.getOperand(0)->getType(), b, i+1);
3642 if (isa<ArrayType>(IndexedTy))
3643 Out << ".array[" << *i << "]";
3645 Out << ".field" << *i;
3648 writeOperand(IVI.getOperand(1));
3651 void CWriter::visitExtractValueInst(ExtractValueInst &EVI) {
3653 if (isa<UndefValue>(EVI.getOperand(0))) {
3655 printType(Out, EVI.getType());
3656 Out << ") 0/*UNDEF*/";
3658 Out << GetValueName(EVI.getOperand(0));
3659 for (const unsigned *b = EVI.idx_begin(), *i = b, *e = EVI.idx_end();
3661 const Type *IndexedTy =
3662 ExtractValueInst::getIndexedType(EVI.getOperand(0)->getType(), b, i+1);
3663 if (isa<ArrayType>(IndexedTy))
3664 Out << ".array[" << *i << "]";
3666 Out << ".field" << *i;
3672 //===----------------------------------------------------------------------===//
3673 // External Interface declaration
3674 //===----------------------------------------------------------------------===//
3676 bool CTargetMachine::addPassesToEmitWholeFile(PassManager &PM,
3677 formatted_raw_ostream &o,
3678 CodeGenFileType FileType,
3679 CodeGenOpt::Level OptLevel) {
3680 if (FileType != TargetMachine::AssemblyFile) return true;
3682 PM.add(createGCLoweringPass());
3683 PM.add(createLowerInvokePass());
3684 PM.add(createCFGSimplificationPass()); // clean up after lower invoke.
3685 PM.add(new CBackendNameAllUsedStructsAndMergeFunctions());
3686 PM.add(new CWriter(o));
3687 PM.add(createGCInfoDeleter());