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/Analysis/ConstantsScanner.h"
28 #include "llvm/Analysis/FindUsedTypes.h"
29 #include "llvm/Analysis/LoopInfo.h"
30 #include "llvm/CodeGen/Passes.h"
31 #include "llvm/CodeGen/IntrinsicLowering.h"
32 #include "llvm/Transforms/Scalar.h"
33 #include "llvm/Target/TargetAsmInfo.h"
34 #include "llvm/Target/TargetData.h"
35 #include "llvm/Target/TargetMachineRegistry.h"
36 #include "llvm/Target/TargetRegistry.h"
37 #include "llvm/Support/CallSite.h"
38 #include "llvm/Support/CFG.h"
39 #include "llvm/Support/ErrorHandling.h"
40 #include "llvm/Support/FormattedStream.h"
41 #include "llvm/Support/GetElementPtrTypeIterator.h"
42 #include "llvm/Support/InstVisitor.h"
43 #include "llvm/Support/Mangler.h"
44 #include "llvm/Support/MathExtras.h"
45 #include "llvm/ADT/StringExtras.h"
46 #include "llvm/ADT/STLExtras.h"
47 #include "llvm/Support/MathExtras.h"
48 #include "llvm/Config/config.h"
53 /// CBackendTargetMachineModule - Note that this is used on hosts that
54 /// cannot link in a library unless there are references into the
55 /// library. In particular, it seems that it is not possible to get
56 /// things to work on Win32 without this. Though it is unused, do not
58 extern "C" int CBackendTargetMachineModule;
59 int CBackendTargetMachineModule = 0;
61 // Register the target.
62 extern Target TheCBackendTarget;
63 static RegisterTarget<CTargetMachine> X(TheCBackendTarget, "c", "C backend");
65 // Force static initialization.
66 extern "C" void LLVMInitializeCBackendTarget() { }
69 /// CBackendNameAllUsedStructsAndMergeFunctions - This pass inserts names for
70 /// any unnamed structure types that are used by the program, and merges
71 /// external functions with the same name.
73 class CBackendNameAllUsedStructsAndMergeFunctions : public ModulePass {
76 CBackendNameAllUsedStructsAndMergeFunctions()
78 void getAnalysisUsage(AnalysisUsage &AU) const {
79 AU.addRequired<FindUsedTypes>();
82 virtual const char *getPassName() const {
83 return "C backend type canonicalizer";
86 virtual bool runOnModule(Module &M);
89 char CBackendNameAllUsedStructsAndMergeFunctions::ID = 0;
91 /// CWriter - This class is the main chunk of code that converts an LLVM
92 /// module to a C translation unit.
93 class CWriter : public FunctionPass, public InstVisitor<CWriter> {
94 formatted_raw_ostream &Out;
95 IntrinsicLowering *IL;
98 const Module *TheModule;
99 const TargetAsmInfo* TAsm;
100 const TargetData* TD;
101 std::map<const Type *, std::string> TypeNames;
102 std::map<const ConstantFP *, unsigned> FPConstantMap;
103 std::set<Function*> intrinsicPrototypesAlreadyGenerated;
104 std::set<const Argument*> ByValParams;
106 unsigned OpaqueCounter;
107 DenseMap<const Value*, unsigned> AnonValueNumbers;
108 unsigned NextAnonValueNumber;
112 explicit CWriter(formatted_raw_ostream &o)
113 : FunctionPass(&ID), Out(o), IL(0), Mang(0), LI(0),
114 TheModule(0), TAsm(0), TD(0), OpaqueCounter(0), NextAnonValueNumber(0) {
118 virtual const char *getPassName() const { return "C backend"; }
120 void getAnalysisUsage(AnalysisUsage &AU) const {
121 AU.addRequired<LoopInfo>();
122 AU.setPreservesAll();
125 virtual bool doInitialization(Module &M);
127 bool runOnFunction(Function &F) {
128 // Do not codegen any 'available_externally' functions at all, they have
129 // definitions outside the translation unit.
130 if (F.hasAvailableExternallyLinkage())
133 LI = &getAnalysis<LoopInfo>();
135 // Get rid of intrinsics we can't handle.
138 // Output all floating point constants that cannot be printed accurately.
139 printFloatingPointConstants(F);
145 virtual bool doFinalization(Module &M) {
150 FPConstantMap.clear();
153 intrinsicPrototypesAlreadyGenerated.clear();
157 raw_ostream &printType(formatted_raw_ostream &Out,
159 bool isSigned = false,
160 const std::string &VariableName = "",
161 bool IgnoreName = false,
162 const AttrListPtr &PAL = AttrListPtr());
163 std::ostream &printType(std::ostream &Out, const Type *Ty,
164 bool isSigned = false,
165 const std::string &VariableName = "",
166 bool IgnoreName = false,
167 const AttrListPtr &PAL = AttrListPtr());
168 raw_ostream &printSimpleType(formatted_raw_ostream &Out,
171 const std::string &NameSoFar = "");
172 std::ostream &printSimpleType(std::ostream &Out, const Type *Ty,
174 const std::string &NameSoFar = "");
176 void printStructReturnPointerFunctionType(formatted_raw_ostream &Out,
177 const AttrListPtr &PAL,
178 const PointerType *Ty);
180 /// writeOperandDeref - Print the result of dereferencing the specified
181 /// operand with '*'. This is equivalent to printing '*' then using
182 /// writeOperand, but avoids excess syntax in some cases.
183 void writeOperandDeref(Value *Operand) {
184 if (isAddressExposed(Operand)) {
185 // Already something with an address exposed.
186 writeOperandInternal(Operand);
189 writeOperand(Operand);
194 void writeOperand(Value *Operand, bool Static = false);
195 void writeInstComputationInline(Instruction &I);
196 void writeOperandInternal(Value *Operand, bool Static = false);
197 void writeOperandWithCast(Value* Operand, unsigned Opcode);
198 void writeOperandWithCast(Value* Operand, const ICmpInst &I);
199 bool writeInstructionCast(const Instruction &I);
201 void writeMemoryAccess(Value *Operand, const Type *OperandType,
202 bool IsVolatile, unsigned Alignment);
205 std::string InterpretASMConstraint(InlineAsm::ConstraintInfo& c);
207 void lowerIntrinsics(Function &F);
209 void printModule(Module *M);
210 void printModuleTypes(const TypeSymbolTable &ST);
211 void printContainedStructs(const Type *Ty, std::set<const Type *> &);
212 void printFloatingPointConstants(Function &F);
213 void printFloatingPointConstants(const Constant *C);
214 void printFunctionSignature(const Function *F, bool Prototype);
216 void printFunction(Function &);
217 void printBasicBlock(BasicBlock *BB);
218 void printLoop(Loop *L);
220 void printCast(unsigned opcode, const Type *SrcTy, const Type *DstTy);
221 void printConstant(Constant *CPV, bool Static);
222 void printConstantWithCast(Constant *CPV, unsigned Opcode);
223 bool printConstExprCast(const ConstantExpr *CE, bool Static);
224 void printConstantArray(ConstantArray *CPA, bool Static);
225 void printConstantVector(ConstantVector *CV, bool Static);
227 /// isAddressExposed - Return true if the specified value's name needs to
228 /// have its address taken in order to get a C value of the correct type.
229 /// This happens for global variables, byval parameters, and direct allocas.
230 bool isAddressExposed(const Value *V) const {
231 if (const Argument *A = dyn_cast<Argument>(V))
232 return ByValParams.count(A);
233 return isa<GlobalVariable>(V) || isDirectAlloca(V);
236 // isInlinableInst - Attempt to inline instructions into their uses to build
237 // trees as much as possible. To do this, we have to consistently decide
238 // what is acceptable to inline, so that variable declarations don't get
239 // printed and an extra copy of the expr is not emitted.
241 static bool isInlinableInst(const Instruction &I) {
242 // Always inline cmp instructions, even if they are shared by multiple
243 // expressions. GCC generates horrible code if we don't.
247 // Must be an expression, must be used exactly once. If it is dead, we
248 // emit it inline where it would go.
249 if (I.getType() == Type::VoidTy || !I.hasOneUse() ||
250 isa<TerminatorInst>(I) || isa<CallInst>(I) || isa<PHINode>(I) ||
251 isa<LoadInst>(I) || isa<VAArgInst>(I) || isa<InsertElementInst>(I) ||
252 isa<InsertValueInst>(I))
253 // Don't inline a load across a store or other bad things!
256 // Must not be used in inline asm, extractelement, or shufflevector.
258 const Instruction &User = cast<Instruction>(*I.use_back());
259 if (isInlineAsm(User) || isa<ExtractElementInst>(User) ||
260 isa<ShuffleVectorInst>(User))
264 // Only inline instruction it if it's use is in the same BB as the inst.
265 return I.getParent() == cast<Instruction>(I.use_back())->getParent();
268 // isDirectAlloca - Define fixed sized allocas in the entry block as direct
269 // variables which are accessed with the & operator. This causes GCC to
270 // generate significantly better code than to emit alloca calls directly.
272 static const AllocaInst *isDirectAlloca(const Value *V) {
273 const AllocaInst *AI = dyn_cast<AllocaInst>(V);
274 if (!AI) return false;
275 if (AI->isArrayAllocation())
276 return 0; // FIXME: we can also inline fixed size array allocas!
277 if (AI->getParent() != &AI->getParent()->getParent()->getEntryBlock())
282 // isInlineAsm - Check if the instruction is a call to an inline asm chunk
283 static bool isInlineAsm(const Instruction& I) {
284 if (isa<CallInst>(&I) && isa<InlineAsm>(I.getOperand(0)))
289 // Instruction visitation functions
290 friend class InstVisitor<CWriter>;
292 void visitReturnInst(ReturnInst &I);
293 void visitBranchInst(BranchInst &I);
294 void visitSwitchInst(SwitchInst &I);
295 void visitInvokeInst(InvokeInst &I) {
296 llvm_unreachable("Lowerinvoke pass didn't work!");
299 void visitUnwindInst(UnwindInst &I) {
300 llvm_unreachable("Lowerinvoke pass didn't work!");
302 void visitUnreachableInst(UnreachableInst &I);
304 void visitPHINode(PHINode &I);
305 void visitBinaryOperator(Instruction &I);
306 void visitICmpInst(ICmpInst &I);
307 void visitFCmpInst(FCmpInst &I);
309 void visitCastInst (CastInst &I);
310 void visitSelectInst(SelectInst &I);
311 void visitCallInst (CallInst &I);
312 void visitInlineAsm(CallInst &I);
313 bool visitBuiltinCall(CallInst &I, Intrinsic::ID ID, bool &WroteCallee);
315 void visitMallocInst(MallocInst &I);
316 void visitAllocaInst(AllocaInst &I);
317 void visitFreeInst (FreeInst &I);
318 void visitLoadInst (LoadInst &I);
319 void visitStoreInst (StoreInst &I);
320 void visitGetElementPtrInst(GetElementPtrInst &I);
321 void visitVAArgInst (VAArgInst &I);
323 void visitInsertElementInst(InsertElementInst &I);
324 void visitExtractElementInst(ExtractElementInst &I);
325 void visitShuffleVectorInst(ShuffleVectorInst &SVI);
327 void visitInsertValueInst(InsertValueInst &I);
328 void visitExtractValueInst(ExtractValueInst &I);
330 void visitInstruction(Instruction &I) {
332 cerr << "C Writer does not know about " << I;
337 void outputLValue(Instruction *I) {
338 Out << " " << GetValueName(I) << " = ";
341 bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To);
342 void printPHICopiesForSuccessor(BasicBlock *CurBlock,
343 BasicBlock *Successor, unsigned Indent);
344 void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
346 void printGEPExpression(Value *Ptr, gep_type_iterator I,
347 gep_type_iterator E, bool Static);
349 std::string GetValueName(const Value *Operand);
353 char CWriter::ID = 0;
355 /// This method inserts names for any unnamed structure types that are used by
356 /// the program, and removes names from structure types that are not used by the
359 bool CBackendNameAllUsedStructsAndMergeFunctions::runOnModule(Module &M) {
360 // Get a set of types that are used by the program...
361 std::set<const Type *> UT = getAnalysis<FindUsedTypes>().getTypes();
363 // Loop over the module symbol table, removing types from UT that are
364 // already named, and removing names for types that are not used.
366 TypeSymbolTable &TST = M.getTypeSymbolTable();
367 for (TypeSymbolTable::iterator TI = TST.begin(), TE = TST.end();
369 TypeSymbolTable::iterator I = TI++;
371 // If this isn't a struct or array type, remove it from our set of types
372 // to name. This simplifies emission later.
373 if (!isa<StructType>(I->second) && !isa<OpaqueType>(I->second) &&
374 !isa<ArrayType>(I->second)) {
377 // If this is not used, remove it from the symbol table.
378 std::set<const Type *>::iterator UTI = UT.find(I->second);
382 UT.erase(UTI); // Only keep one name for this type.
386 // UT now contains types that are not named. Loop over it, naming
389 bool Changed = false;
390 unsigned RenameCounter = 0;
391 for (std::set<const Type *>::const_iterator I = UT.begin(), E = UT.end();
393 if (isa<StructType>(*I) || isa<ArrayType>(*I)) {
394 while (M.addTypeName("unnamed"+utostr(RenameCounter), *I))
400 // Loop over all external functions and globals. If we have two with
401 // identical names, merge them.
402 // FIXME: This code should disappear when we don't allow values with the same
403 // names when they have different types!
404 std::map<std::string, GlobalValue*> ExtSymbols;
405 for (Module::iterator I = M.begin(), E = M.end(); I != E;) {
407 if (GV->isDeclaration() && GV->hasName()) {
408 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
409 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
411 // Found a conflict, replace this global with the previous one.
412 GlobalValue *OldGV = X.first->second;
413 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
414 GV->eraseFromParent();
419 // Do the same for globals.
420 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
422 GlobalVariable *GV = I++;
423 if (GV->isDeclaration() && GV->hasName()) {
424 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
425 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
427 // Found a conflict, replace this global with the previous one.
428 GlobalValue *OldGV = X.first->second;
429 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
430 GV->eraseFromParent();
439 /// printStructReturnPointerFunctionType - This is like printType for a struct
440 /// return type, except, instead of printing the type as void (*)(Struct*, ...)
441 /// print it as "Struct (*)(...)", for struct return functions.
442 void CWriter::printStructReturnPointerFunctionType(formatted_raw_ostream &Out,
443 const AttrListPtr &PAL,
444 const PointerType *TheTy) {
445 const FunctionType *FTy = cast<FunctionType>(TheTy->getElementType());
446 std::stringstream FunctionInnards;
447 FunctionInnards << " (*) (";
448 bool PrintedType = false;
450 FunctionType::param_iterator I = FTy->param_begin(), E = FTy->param_end();
451 const Type *RetTy = cast<PointerType>(I->get())->getElementType();
453 for (++I, ++Idx; I != E; ++I, ++Idx) {
455 FunctionInnards << ", ";
456 const Type *ArgTy = *I;
457 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
458 assert(isa<PointerType>(ArgTy));
459 ArgTy = cast<PointerType>(ArgTy)->getElementType();
461 printType(FunctionInnards, ArgTy,
462 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
465 if (FTy->isVarArg()) {
467 FunctionInnards << ", ...";
468 } else if (!PrintedType) {
469 FunctionInnards << "void";
471 FunctionInnards << ')';
472 std::string tstr = FunctionInnards.str();
473 printType(Out, RetTy,
474 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
478 CWriter::printSimpleType(formatted_raw_ostream &Out, const Type *Ty,
480 const std::string &NameSoFar) {
481 assert((Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) &&
482 "Invalid type for printSimpleType");
483 switch (Ty->getTypeID()) {
484 case Type::VoidTyID: return Out << "void " << NameSoFar;
485 case Type::IntegerTyID: {
486 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
488 return Out << "bool " << NameSoFar;
489 else if (NumBits <= 8)
490 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
491 else if (NumBits <= 16)
492 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
493 else if (NumBits <= 32)
494 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
495 else if (NumBits <= 64)
496 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
498 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
499 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
502 case Type::FloatTyID: return Out << "float " << NameSoFar;
503 case Type::DoubleTyID: return Out << "double " << NameSoFar;
504 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
505 // present matches host 'long double'.
506 case Type::X86_FP80TyID:
507 case Type::PPC_FP128TyID:
508 case Type::FP128TyID: return Out << "long double " << NameSoFar;
510 case Type::VectorTyID: {
511 const VectorType *VTy = cast<VectorType>(Ty);
512 return printSimpleType(Out, VTy->getElementType(), isSigned,
513 " __attribute__((vector_size(" +
514 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
519 cerr << "Unknown primitive type: " << *Ty << "\n";
526 CWriter::printSimpleType(std::ostream &Out, const Type *Ty, bool isSigned,
527 const std::string &NameSoFar) {
528 assert((Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) &&
529 "Invalid type for printSimpleType");
530 switch (Ty->getTypeID()) {
531 case Type::VoidTyID: return Out << "void " << NameSoFar;
532 case Type::IntegerTyID: {
533 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
535 return Out << "bool " << NameSoFar;
536 else if (NumBits <= 8)
537 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
538 else if (NumBits <= 16)
539 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
540 else if (NumBits <= 32)
541 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
542 else if (NumBits <= 64)
543 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
545 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
546 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
549 case Type::FloatTyID: return Out << "float " << NameSoFar;
550 case Type::DoubleTyID: return Out << "double " << NameSoFar;
551 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
552 // present matches host 'long double'.
553 case Type::X86_FP80TyID:
554 case Type::PPC_FP128TyID:
555 case Type::FP128TyID: return Out << "long double " << NameSoFar;
557 case Type::VectorTyID: {
558 const VectorType *VTy = cast<VectorType>(Ty);
559 return printSimpleType(Out, VTy->getElementType(), isSigned,
560 " __attribute__((vector_size(" +
561 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
566 cerr << "Unknown primitive type: " << *Ty << "\n";
572 // Pass the Type* and the variable name and this prints out the variable
575 raw_ostream &CWriter::printType(formatted_raw_ostream &Out,
577 bool isSigned, const std::string &NameSoFar,
578 bool IgnoreName, const AttrListPtr &PAL) {
579 if (Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) {
580 printSimpleType(Out, Ty, isSigned, NameSoFar);
584 // Check to see if the type is named.
585 if (!IgnoreName || isa<OpaqueType>(Ty)) {
586 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
587 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
590 switch (Ty->getTypeID()) {
591 case Type::FunctionTyID: {
592 const FunctionType *FTy = cast<FunctionType>(Ty);
593 std::stringstream FunctionInnards;
594 FunctionInnards << " (" << NameSoFar << ") (";
596 for (FunctionType::param_iterator I = FTy->param_begin(),
597 E = FTy->param_end(); I != E; ++I) {
598 const Type *ArgTy = *I;
599 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
600 assert(isa<PointerType>(ArgTy));
601 ArgTy = cast<PointerType>(ArgTy)->getElementType();
603 if (I != FTy->param_begin())
604 FunctionInnards << ", ";
605 printType(FunctionInnards, ArgTy,
606 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
609 if (FTy->isVarArg()) {
610 if (FTy->getNumParams())
611 FunctionInnards << ", ...";
612 } else if (!FTy->getNumParams()) {
613 FunctionInnards << "void";
615 FunctionInnards << ')';
616 std::string tstr = FunctionInnards.str();
617 printType(Out, FTy->getReturnType(),
618 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
621 case Type::StructTyID: {
622 const StructType *STy = cast<StructType>(Ty);
623 Out << NameSoFar + " {\n";
625 for (StructType::element_iterator I = STy->element_begin(),
626 E = STy->element_end(); I != E; ++I) {
628 printType(Out, *I, false, "field" + utostr(Idx++));
633 Out << " __attribute__ ((packed))";
637 case Type::PointerTyID: {
638 const PointerType *PTy = cast<PointerType>(Ty);
639 std::string ptrName = "*" + NameSoFar;
641 if (isa<ArrayType>(PTy->getElementType()) ||
642 isa<VectorType>(PTy->getElementType()))
643 ptrName = "(" + ptrName + ")";
646 // Must be a function ptr cast!
647 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
648 return printType(Out, PTy->getElementType(), false, ptrName);
651 case Type::ArrayTyID: {
652 const ArrayType *ATy = cast<ArrayType>(Ty);
653 unsigned NumElements = ATy->getNumElements();
654 if (NumElements == 0) NumElements = 1;
655 // Arrays are wrapped in structs to allow them to have normal
656 // value semantics (avoiding the array "decay").
657 Out << NameSoFar << " { ";
658 printType(Out, ATy->getElementType(), false,
659 "array[" + utostr(NumElements) + "]");
663 case Type::OpaqueTyID: {
664 std::string TyName = "struct opaque_" + itostr(OpaqueCounter++);
665 assert(TypeNames.find(Ty) == TypeNames.end());
666 TypeNames[Ty] = TyName;
667 return Out << TyName << ' ' << NameSoFar;
670 llvm_unreachable("Unhandled case in getTypeProps!");
676 // Pass the Type* and the variable name and this prints out the variable
679 std::ostream &CWriter::printType(std::ostream &Out, const Type *Ty,
680 bool isSigned, const std::string &NameSoFar,
681 bool IgnoreName, const AttrListPtr &PAL) {
682 if (Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) {
683 printSimpleType(Out, Ty, isSigned, NameSoFar);
687 // Check to see if the type is named.
688 if (!IgnoreName || isa<OpaqueType>(Ty)) {
689 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
690 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
693 switch (Ty->getTypeID()) {
694 case Type::FunctionTyID: {
695 const FunctionType *FTy = cast<FunctionType>(Ty);
696 std::stringstream FunctionInnards;
697 FunctionInnards << " (" << NameSoFar << ") (";
699 for (FunctionType::param_iterator I = FTy->param_begin(),
700 E = FTy->param_end(); I != E; ++I) {
701 const Type *ArgTy = *I;
702 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
703 assert(isa<PointerType>(ArgTy));
704 ArgTy = cast<PointerType>(ArgTy)->getElementType();
706 if (I != FTy->param_begin())
707 FunctionInnards << ", ";
708 printType(FunctionInnards, ArgTy,
709 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
712 if (FTy->isVarArg()) {
713 if (FTy->getNumParams())
714 FunctionInnards << ", ...";
715 } else if (!FTy->getNumParams()) {
716 FunctionInnards << "void";
718 FunctionInnards << ')';
719 std::string tstr = FunctionInnards.str();
720 printType(Out, FTy->getReturnType(),
721 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
724 case Type::StructTyID: {
725 const StructType *STy = cast<StructType>(Ty);
726 Out << NameSoFar + " {\n";
728 for (StructType::element_iterator I = STy->element_begin(),
729 E = STy->element_end(); I != E; ++I) {
731 printType(Out, *I, false, "field" + utostr(Idx++));
736 Out << " __attribute__ ((packed))";
740 case Type::PointerTyID: {
741 const PointerType *PTy = cast<PointerType>(Ty);
742 std::string ptrName = "*" + NameSoFar;
744 if (isa<ArrayType>(PTy->getElementType()) ||
745 isa<VectorType>(PTy->getElementType()))
746 ptrName = "(" + ptrName + ")";
749 // Must be a function ptr cast!
750 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
751 return printType(Out, PTy->getElementType(), false, ptrName);
754 case Type::ArrayTyID: {
755 const ArrayType *ATy = cast<ArrayType>(Ty);
756 unsigned NumElements = ATy->getNumElements();
757 if (NumElements == 0) NumElements = 1;
758 // Arrays are wrapped in structs to allow them to have normal
759 // value semantics (avoiding the array "decay").
760 Out << NameSoFar << " { ";
761 printType(Out, ATy->getElementType(), false,
762 "array[" + utostr(NumElements) + "]");
766 case Type::OpaqueTyID: {
767 std::string TyName = "struct opaque_" + itostr(OpaqueCounter++);
768 assert(TypeNames.find(Ty) == TypeNames.end());
769 TypeNames[Ty] = TyName;
770 return Out << TyName << ' ' << NameSoFar;
773 llvm_unreachable("Unhandled case in getTypeProps!");
779 void CWriter::printConstantArray(ConstantArray *CPA, bool Static) {
781 // As a special case, print the array as a string if it is an array of
782 // ubytes or an array of sbytes with positive values.
784 const Type *ETy = CPA->getType()->getElementType();
785 bool isString = (ETy == Type::Int8Ty || ETy == Type::Int8Ty);
787 // Make sure the last character is a null char, as automatically added by C
788 if (isString && (CPA->getNumOperands() == 0 ||
789 !cast<Constant>(*(CPA->op_end()-1))->isNullValue()))
794 // Keep track of whether the last number was a hexadecimal escape
795 bool LastWasHex = false;
797 // Do not include the last character, which we know is null
798 for (unsigned i = 0, e = CPA->getNumOperands()-1; i != e; ++i) {
799 unsigned char C = cast<ConstantInt>(CPA->getOperand(i))->getZExtValue();
801 // Print it out literally if it is a printable character. The only thing
802 // to be careful about is when the last letter output was a hex escape
803 // code, in which case we have to be careful not to print out hex digits
804 // explicitly (the C compiler thinks it is a continuation of the previous
805 // character, sheesh...)
807 if (isprint(C) && (!LastWasHex || !isxdigit(C))) {
809 if (C == '"' || C == '\\')
810 Out << "\\" << (char)C;
816 case '\n': Out << "\\n"; break;
817 case '\t': Out << "\\t"; break;
818 case '\r': Out << "\\r"; break;
819 case '\v': Out << "\\v"; break;
820 case '\a': Out << "\\a"; break;
821 case '\"': Out << "\\\""; break;
822 case '\'': Out << "\\\'"; break;
825 Out << (char)(( C/16 < 10) ? ( C/16 +'0') : ( C/16 -10+'A'));
826 Out << (char)(((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A'));
835 if (CPA->getNumOperands()) {
837 printConstant(cast<Constant>(CPA->getOperand(0)), Static);
838 for (unsigned i = 1, e = CPA->getNumOperands(); i != e; ++i) {
840 printConstant(cast<Constant>(CPA->getOperand(i)), Static);
847 void CWriter::printConstantVector(ConstantVector *CP, bool Static) {
849 if (CP->getNumOperands()) {
851 printConstant(cast<Constant>(CP->getOperand(0)), Static);
852 for (unsigned i = 1, e = CP->getNumOperands(); i != e; ++i) {
854 printConstant(cast<Constant>(CP->getOperand(i)), Static);
860 // isFPCSafeToPrint - Returns true if we may assume that CFP may be written out
861 // textually as a double (rather than as a reference to a stack-allocated
862 // variable). We decide this by converting CFP to a string and back into a
863 // double, and then checking whether the conversion results in a bit-equal
864 // double to the original value of CFP. This depends on us and the target C
865 // compiler agreeing on the conversion process (which is pretty likely since we
866 // only deal in IEEE FP).
868 static bool isFPCSafeToPrint(const ConstantFP *CFP) {
870 // Do long doubles in hex for now.
871 if (CFP->getType() != Type::FloatTy && CFP->getType() != Type::DoubleTy)
873 APFloat APF = APFloat(CFP->getValueAPF()); // copy
874 if (CFP->getType() == Type::FloatTy)
875 APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &ignored);
876 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
878 sprintf(Buffer, "%a", APF.convertToDouble());
879 if (!strncmp(Buffer, "0x", 2) ||
880 !strncmp(Buffer, "-0x", 3) ||
881 !strncmp(Buffer, "+0x", 3))
882 return APF.bitwiseIsEqual(APFloat(atof(Buffer)));
885 std::string StrVal = ftostr(APF);
887 while (StrVal[0] == ' ')
888 StrVal.erase(StrVal.begin());
890 // Check to make sure that the stringized number is not some string like "Inf"
891 // or NaN. Check that the string matches the "[-+]?[0-9]" regex.
892 if ((StrVal[0] >= '0' && StrVal[0] <= '9') ||
893 ((StrVal[0] == '-' || StrVal[0] == '+') &&
894 (StrVal[1] >= '0' && StrVal[1] <= '9')))
895 // Reparse stringized version!
896 return APF.bitwiseIsEqual(APFloat(atof(StrVal.c_str())));
901 /// Print out the casting for a cast operation. This does the double casting
902 /// necessary for conversion to the destination type, if necessary.
903 /// @brief Print a cast
904 void CWriter::printCast(unsigned opc, const Type *SrcTy, const Type *DstTy) {
905 // Print the destination type cast
907 case Instruction::UIToFP:
908 case Instruction::SIToFP:
909 case Instruction::IntToPtr:
910 case Instruction::Trunc:
911 case Instruction::BitCast:
912 case Instruction::FPExt:
913 case Instruction::FPTrunc: // For these the DstTy sign doesn't matter
915 printType(Out, DstTy);
918 case Instruction::ZExt:
919 case Instruction::PtrToInt:
920 case Instruction::FPToUI: // For these, make sure we get an unsigned dest
922 printSimpleType(Out, DstTy, false);
925 case Instruction::SExt:
926 case Instruction::FPToSI: // For these, make sure we get a signed dest
928 printSimpleType(Out, DstTy, true);
932 llvm_unreachable("Invalid cast opcode");
935 // Print the source type cast
937 case Instruction::UIToFP:
938 case Instruction::ZExt:
940 printSimpleType(Out, SrcTy, false);
943 case Instruction::SIToFP:
944 case Instruction::SExt:
946 printSimpleType(Out, SrcTy, true);
949 case Instruction::IntToPtr:
950 case Instruction::PtrToInt:
951 // Avoid "cast to pointer from integer of different size" warnings
952 Out << "(unsigned long)";
954 case Instruction::Trunc:
955 case Instruction::BitCast:
956 case Instruction::FPExt:
957 case Instruction::FPTrunc:
958 case Instruction::FPToSI:
959 case Instruction::FPToUI:
960 break; // These don't need a source cast.
962 llvm_unreachable("Invalid cast opcode");
967 // printConstant - The LLVM Constant to C Constant converter.
968 void CWriter::printConstant(Constant *CPV, bool Static) {
969 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
970 switch (CE->getOpcode()) {
971 case Instruction::Trunc:
972 case Instruction::ZExt:
973 case Instruction::SExt:
974 case Instruction::FPTrunc:
975 case Instruction::FPExt:
976 case Instruction::UIToFP:
977 case Instruction::SIToFP:
978 case Instruction::FPToUI:
979 case Instruction::FPToSI:
980 case Instruction::PtrToInt:
981 case Instruction::IntToPtr:
982 case Instruction::BitCast:
984 printCast(CE->getOpcode(), CE->getOperand(0)->getType(), CE->getType());
985 if (CE->getOpcode() == Instruction::SExt &&
986 CE->getOperand(0)->getType() == Type::Int1Ty) {
987 // Make sure we really sext from bool here by subtracting from 0
990 printConstant(CE->getOperand(0), Static);
991 if (CE->getType() == Type::Int1Ty &&
992 (CE->getOpcode() == Instruction::Trunc ||
993 CE->getOpcode() == Instruction::FPToUI ||
994 CE->getOpcode() == Instruction::FPToSI ||
995 CE->getOpcode() == Instruction::PtrToInt)) {
996 // Make sure we really truncate to bool here by anding with 1
1002 case Instruction::GetElementPtr:
1004 printGEPExpression(CE->getOperand(0), gep_type_begin(CPV),
1005 gep_type_end(CPV), Static);
1008 case Instruction::Select:
1010 printConstant(CE->getOperand(0), Static);
1012 printConstant(CE->getOperand(1), Static);
1014 printConstant(CE->getOperand(2), Static);
1017 case Instruction::Add:
1018 case Instruction::FAdd:
1019 case Instruction::Sub:
1020 case Instruction::FSub:
1021 case Instruction::Mul:
1022 case Instruction::FMul:
1023 case Instruction::SDiv:
1024 case Instruction::UDiv:
1025 case Instruction::FDiv:
1026 case Instruction::URem:
1027 case Instruction::SRem:
1028 case Instruction::FRem:
1029 case Instruction::And:
1030 case Instruction::Or:
1031 case Instruction::Xor:
1032 case Instruction::ICmp:
1033 case Instruction::Shl:
1034 case Instruction::LShr:
1035 case Instruction::AShr:
1038 bool NeedsClosingParens = printConstExprCast(CE, Static);
1039 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
1040 switch (CE->getOpcode()) {
1041 case Instruction::Add:
1042 case Instruction::FAdd: Out << " + "; break;
1043 case Instruction::Sub:
1044 case Instruction::FSub: Out << " - "; break;
1045 case Instruction::Mul:
1046 case Instruction::FMul: Out << " * "; break;
1047 case Instruction::URem:
1048 case Instruction::SRem:
1049 case Instruction::FRem: Out << " % "; break;
1050 case Instruction::UDiv:
1051 case Instruction::SDiv:
1052 case Instruction::FDiv: Out << " / "; break;
1053 case Instruction::And: Out << " & "; break;
1054 case Instruction::Or: Out << " | "; break;
1055 case Instruction::Xor: Out << " ^ "; break;
1056 case Instruction::Shl: Out << " << "; break;
1057 case Instruction::LShr:
1058 case Instruction::AShr: Out << " >> "; break;
1059 case Instruction::ICmp:
1060 switch (CE->getPredicate()) {
1061 case ICmpInst::ICMP_EQ: Out << " == "; break;
1062 case ICmpInst::ICMP_NE: Out << " != "; break;
1063 case ICmpInst::ICMP_SLT:
1064 case ICmpInst::ICMP_ULT: Out << " < "; break;
1065 case ICmpInst::ICMP_SLE:
1066 case ICmpInst::ICMP_ULE: Out << " <= "; break;
1067 case ICmpInst::ICMP_SGT:
1068 case ICmpInst::ICMP_UGT: Out << " > "; break;
1069 case ICmpInst::ICMP_SGE:
1070 case ICmpInst::ICMP_UGE: Out << " >= "; break;
1071 default: llvm_unreachable("Illegal ICmp predicate");
1074 default: llvm_unreachable("Illegal opcode here!");
1076 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
1077 if (NeedsClosingParens)
1082 case Instruction::FCmp: {
1084 bool NeedsClosingParens = printConstExprCast(CE, Static);
1085 if (CE->getPredicate() == FCmpInst::FCMP_FALSE)
1087 else if (CE->getPredicate() == FCmpInst::FCMP_TRUE)
1091 switch (CE->getPredicate()) {
1092 default: llvm_unreachable("Illegal FCmp predicate");
1093 case FCmpInst::FCMP_ORD: op = "ord"; break;
1094 case FCmpInst::FCMP_UNO: op = "uno"; break;
1095 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
1096 case FCmpInst::FCMP_UNE: op = "une"; break;
1097 case FCmpInst::FCMP_ULT: op = "ult"; break;
1098 case FCmpInst::FCMP_ULE: op = "ule"; break;
1099 case FCmpInst::FCMP_UGT: op = "ugt"; break;
1100 case FCmpInst::FCMP_UGE: op = "uge"; break;
1101 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
1102 case FCmpInst::FCMP_ONE: op = "one"; break;
1103 case FCmpInst::FCMP_OLT: op = "olt"; break;
1104 case FCmpInst::FCMP_OLE: op = "ole"; break;
1105 case FCmpInst::FCMP_OGT: op = "ogt"; break;
1106 case FCmpInst::FCMP_OGE: op = "oge"; break;
1108 Out << "llvm_fcmp_" << op << "(";
1109 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
1111 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
1114 if (NeedsClosingParens)
1121 cerr << "CWriter Error: Unhandled constant expression: "
1124 llvm_unreachable(0);
1126 } else if (isa<UndefValue>(CPV) && CPV->getType()->isSingleValueType()) {
1128 printType(Out, CPV->getType()); // sign doesn't matter
1129 Out << ")/*UNDEF*/";
1130 if (!isa<VectorType>(CPV->getType())) {
1138 if (ConstantInt *CI = dyn_cast<ConstantInt>(CPV)) {
1139 const Type* Ty = CI->getType();
1140 if (Ty == Type::Int1Ty)
1141 Out << (CI->getZExtValue() ? '1' : '0');
1142 else if (Ty == Type::Int32Ty)
1143 Out << CI->getZExtValue() << 'u';
1144 else if (Ty->getPrimitiveSizeInBits() > 32)
1145 Out << CI->getZExtValue() << "ull";
1148 printSimpleType(Out, Ty, false) << ')';
1149 if (CI->isMinValue(true))
1150 Out << CI->getZExtValue() << 'u';
1152 Out << CI->getSExtValue();
1158 switch (CPV->getType()->getTypeID()) {
1159 case Type::FloatTyID:
1160 case Type::DoubleTyID:
1161 case Type::X86_FP80TyID:
1162 case Type::PPC_FP128TyID:
1163 case Type::FP128TyID: {
1164 ConstantFP *FPC = cast<ConstantFP>(CPV);
1165 std::map<const ConstantFP*, unsigned>::iterator I = FPConstantMap.find(FPC);
1166 if (I != FPConstantMap.end()) {
1167 // Because of FP precision problems we must load from a stack allocated
1168 // value that holds the value in hex.
1169 Out << "(*(" << (FPC->getType() == Type::FloatTy ? "float" :
1170 FPC->getType() == Type::DoubleTy ? "double" :
1172 << "*)&FPConstant" << I->second << ')';
1175 if (FPC->getType() == Type::FloatTy)
1176 V = FPC->getValueAPF().convertToFloat();
1177 else if (FPC->getType() == Type::DoubleTy)
1178 V = FPC->getValueAPF().convertToDouble();
1180 // Long double. Convert the number to double, discarding precision.
1181 // This is not awesome, but it at least makes the CBE output somewhat
1183 APFloat Tmp = FPC->getValueAPF();
1185 Tmp.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &LosesInfo);
1186 V = Tmp.convertToDouble();
1192 // FIXME the actual NaN bits should be emitted.
1193 // The prefix for a quiet NaN is 0x7FF8. For a signalling NaN,
1195 const unsigned long QuietNaN = 0x7ff8UL;
1196 //const unsigned long SignalNaN = 0x7ff4UL;
1198 // We need to grab the first part of the FP #
1201 uint64_t ll = DoubleToBits(V);
1202 sprintf(Buffer, "0x%llx", static_cast<long long>(ll));
1204 std::string Num(&Buffer[0], &Buffer[6]);
1205 unsigned long Val = strtoul(Num.c_str(), 0, 16);
1207 if (FPC->getType() == Type::FloatTy)
1208 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "F(\""
1209 << Buffer << "\") /*nan*/ ";
1211 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "(\""
1212 << Buffer << "\") /*nan*/ ";
1213 } else if (IsInf(V)) {
1215 if (V < 0) Out << '-';
1216 Out << "LLVM_INF" << (FPC->getType() == Type::FloatTy ? "F" : "")
1220 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
1221 // Print out the constant as a floating point number.
1223 sprintf(Buffer, "%a", V);
1226 Num = ftostr(FPC->getValueAPF());
1234 case Type::ArrayTyID:
1235 // Use C99 compound expression literal initializer syntax.
1238 printType(Out, CPV->getType());
1241 Out << "{ "; // Arrays are wrapped in struct types.
1242 if (ConstantArray *CA = dyn_cast<ConstantArray>(CPV)) {
1243 printConstantArray(CA, Static);
1245 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1246 const ArrayType *AT = cast<ArrayType>(CPV->getType());
1248 if (AT->getNumElements()) {
1250 Constant *CZ = Context->getNullValue(AT->getElementType());
1251 printConstant(CZ, Static);
1252 for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
1254 printConstant(CZ, Static);
1259 Out << " }"; // Arrays are wrapped in struct types.
1262 case Type::VectorTyID:
1263 // Use C99 compound expression literal initializer syntax.
1266 printType(Out, CPV->getType());
1269 if (ConstantVector *CV = dyn_cast<ConstantVector>(CPV)) {
1270 printConstantVector(CV, Static);
1272 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1273 const VectorType *VT = cast<VectorType>(CPV->getType());
1275 Constant *CZ = Context->getNullValue(VT->getElementType());
1276 printConstant(CZ, Static);
1277 for (unsigned i = 1, e = VT->getNumElements(); i != e; ++i) {
1279 printConstant(CZ, Static);
1285 case Type::StructTyID:
1286 // Use C99 compound expression literal initializer syntax.
1289 printType(Out, CPV->getType());
1292 if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
1293 const StructType *ST = cast<StructType>(CPV->getType());
1295 if (ST->getNumElements()) {
1297 printConstant(Context->getNullValue(ST->getElementType(0)), Static);
1298 for (unsigned i = 1, e = ST->getNumElements(); i != e; ++i) {
1300 printConstant(Context->getNullValue(ST->getElementType(i)), Static);
1306 if (CPV->getNumOperands()) {
1308 printConstant(cast<Constant>(CPV->getOperand(0)), Static);
1309 for (unsigned i = 1, e = CPV->getNumOperands(); i != e; ++i) {
1311 printConstant(cast<Constant>(CPV->getOperand(i)), Static);
1318 case Type::PointerTyID:
1319 if (isa<ConstantPointerNull>(CPV)) {
1321 printType(Out, CPV->getType()); // sign doesn't matter
1322 Out << ")/*NULL*/0)";
1324 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(CPV)) {
1325 writeOperand(GV, Static);
1331 cerr << "Unknown constant type: " << *CPV << "\n";
1333 llvm_unreachable(0);
1337 // Some constant expressions need to be casted back to the original types
1338 // because their operands were casted to the expected type. This function takes
1339 // care of detecting that case and printing the cast for the ConstantExpr.
1340 bool CWriter::printConstExprCast(const ConstantExpr* CE, bool Static) {
1341 bool NeedsExplicitCast = false;
1342 const Type *Ty = CE->getOperand(0)->getType();
1343 bool TypeIsSigned = false;
1344 switch (CE->getOpcode()) {
1345 case Instruction::Add:
1346 case Instruction::Sub:
1347 case Instruction::Mul:
1348 // We need to cast integer arithmetic so that it is always performed
1349 // as unsigned, to avoid undefined behavior on overflow.
1350 case Instruction::LShr:
1351 case Instruction::URem:
1352 case Instruction::UDiv: NeedsExplicitCast = true; break;
1353 case Instruction::AShr:
1354 case Instruction::SRem:
1355 case Instruction::SDiv: NeedsExplicitCast = true; TypeIsSigned = true; break;
1356 case Instruction::SExt:
1358 NeedsExplicitCast = true;
1359 TypeIsSigned = true;
1361 case Instruction::ZExt:
1362 case Instruction::Trunc:
1363 case Instruction::FPTrunc:
1364 case Instruction::FPExt:
1365 case Instruction::UIToFP:
1366 case Instruction::SIToFP:
1367 case Instruction::FPToUI:
1368 case Instruction::FPToSI:
1369 case Instruction::PtrToInt:
1370 case Instruction::IntToPtr:
1371 case Instruction::BitCast:
1373 NeedsExplicitCast = true;
1377 if (NeedsExplicitCast) {
1379 if (Ty->isInteger() && Ty != Type::Int1Ty)
1380 printSimpleType(Out, Ty, TypeIsSigned);
1382 printType(Out, Ty); // not integer, sign doesn't matter
1385 return NeedsExplicitCast;
1388 // Print a constant assuming that it is the operand for a given Opcode. The
1389 // opcodes that care about sign need to cast their operands to the expected
1390 // type before the operation proceeds. This function does the casting.
1391 void CWriter::printConstantWithCast(Constant* CPV, unsigned Opcode) {
1393 // Extract the operand's type, we'll need it.
1394 const Type* OpTy = CPV->getType();
1396 // Indicate whether to do the cast or not.
1397 bool shouldCast = false;
1398 bool typeIsSigned = false;
1400 // Based on the Opcode for which this Constant is being written, determine
1401 // the new type to which the operand should be casted by setting the value
1402 // of OpTy. If we change OpTy, also set shouldCast to true so it gets
1406 // for most instructions, it doesn't matter
1408 case Instruction::Add:
1409 case Instruction::Sub:
1410 case Instruction::Mul:
1411 // We need to cast integer arithmetic so that it is always performed
1412 // as unsigned, to avoid undefined behavior on overflow.
1413 case Instruction::LShr:
1414 case Instruction::UDiv:
1415 case Instruction::URem:
1418 case Instruction::AShr:
1419 case Instruction::SDiv:
1420 case Instruction::SRem:
1422 typeIsSigned = true;
1426 // Write out the casted constant if we should, otherwise just write the
1430 printSimpleType(Out, OpTy, typeIsSigned);
1432 printConstant(CPV, false);
1435 printConstant(CPV, false);
1438 std::string CWriter::GetValueName(const Value *Operand) {
1439 // Mangle globals with the standard mangler interface for LLC compatibility.
1440 if (const GlobalValue *GV = dyn_cast<GlobalValue>(Operand))
1441 return Mang->getMangledName(GV);
1443 std::string Name = Operand->getName();
1445 if (Name.empty()) { // Assign unique names to local temporaries.
1446 unsigned &No = AnonValueNumbers[Operand];
1448 No = ++NextAnonValueNumber;
1449 Name = "tmp__" + utostr(No);
1452 std::string VarName;
1453 VarName.reserve(Name.capacity());
1455 for (std::string::iterator I = Name.begin(), E = Name.end();
1459 if (!((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
1460 (ch >= '0' && ch <= '9') || ch == '_')) {
1462 sprintf(buffer, "_%x_", ch);
1468 return "llvm_cbe_" + VarName;
1471 /// writeInstComputationInline - Emit the computation for the specified
1472 /// instruction inline, with no destination provided.
1473 void CWriter::writeInstComputationInline(Instruction &I) {
1474 // We can't currently support integer types other than 1, 8, 16, 32, 64.
1476 const Type *Ty = I.getType();
1477 if (Ty->isInteger() && (Ty!=Type::Int1Ty && Ty!=Type::Int8Ty &&
1478 Ty!=Type::Int16Ty && Ty!=Type::Int32Ty && Ty!=Type::Int64Ty)) {
1479 llvm_report_error("The C backend does not currently support integer "
1480 "types of widths other than 1, 8, 16, 32, 64.\n"
1481 "This is being tracked as PR 4158.");
1484 // If this is a non-trivial bool computation, make sure to truncate down to
1485 // a 1 bit value. This is important because we want "add i1 x, y" to return
1486 // "0" when x and y are true, not "2" for example.
1487 bool NeedBoolTrunc = false;
1488 if (I.getType() == Type::Int1Ty && !isa<ICmpInst>(I) && !isa<FCmpInst>(I))
1489 NeedBoolTrunc = true;
1501 void CWriter::writeOperandInternal(Value *Operand, bool Static) {
1502 if (Instruction *I = dyn_cast<Instruction>(Operand))
1503 // Should we inline this instruction to build a tree?
1504 if (isInlinableInst(*I) && !isDirectAlloca(I)) {
1506 writeInstComputationInline(*I);
1511 Constant* CPV = dyn_cast<Constant>(Operand);
1513 if (CPV && !isa<GlobalValue>(CPV))
1514 printConstant(CPV, Static);
1516 Out << GetValueName(Operand);
1519 void CWriter::writeOperand(Value *Operand, bool Static) {
1520 bool isAddressImplicit = isAddressExposed(Operand);
1521 if (isAddressImplicit)
1522 Out << "(&"; // Global variables are referenced as their addresses by llvm
1524 writeOperandInternal(Operand, Static);
1526 if (isAddressImplicit)
1530 // Some instructions need to have their result value casted back to the
1531 // original types because their operands were casted to the expected type.
1532 // This function takes care of detecting that case and printing the cast
1533 // for the Instruction.
1534 bool CWriter::writeInstructionCast(const Instruction &I) {
1535 const Type *Ty = I.getOperand(0)->getType();
1536 switch (I.getOpcode()) {
1537 case Instruction::Add:
1538 case Instruction::Sub:
1539 case Instruction::Mul:
1540 // We need to cast integer arithmetic so that it is always performed
1541 // as unsigned, to avoid undefined behavior on overflow.
1542 case Instruction::LShr:
1543 case Instruction::URem:
1544 case Instruction::UDiv:
1546 printSimpleType(Out, Ty, false);
1549 case Instruction::AShr:
1550 case Instruction::SRem:
1551 case Instruction::SDiv:
1553 printSimpleType(Out, Ty, true);
1561 // Write the operand with a cast to another type based on the Opcode being used.
1562 // This will be used in cases where an instruction has specific type
1563 // requirements (usually signedness) for its operands.
1564 void CWriter::writeOperandWithCast(Value* Operand, unsigned Opcode) {
1566 // Extract the operand's type, we'll need it.
1567 const Type* OpTy = Operand->getType();
1569 // Indicate whether to do the cast or not.
1570 bool shouldCast = false;
1572 // Indicate whether the cast should be to a signed type or not.
1573 bool castIsSigned = false;
1575 // Based on the Opcode for which this Operand is being written, determine
1576 // the new type to which the operand should be casted by setting the value
1577 // of OpTy. If we change OpTy, also set shouldCast to true.
1580 // for most instructions, it doesn't matter
1582 case Instruction::Add:
1583 case Instruction::Sub:
1584 case Instruction::Mul:
1585 // We need to cast integer arithmetic so that it is always performed
1586 // as unsigned, to avoid undefined behavior on overflow.
1587 case Instruction::LShr:
1588 case Instruction::UDiv:
1589 case Instruction::URem: // Cast to unsigned first
1591 castIsSigned = false;
1593 case Instruction::GetElementPtr:
1594 case Instruction::AShr:
1595 case Instruction::SDiv:
1596 case Instruction::SRem: // Cast to signed first
1598 castIsSigned = true;
1602 // Write out the casted operand if we should, otherwise just write the
1606 printSimpleType(Out, OpTy, castIsSigned);
1608 writeOperand(Operand);
1611 writeOperand(Operand);
1614 // Write the operand with a cast to another type based on the icmp predicate
1616 void CWriter::writeOperandWithCast(Value* Operand, const ICmpInst &Cmp) {
1617 // This has to do a cast to ensure the operand has the right signedness.
1618 // Also, if the operand is a pointer, we make sure to cast to an integer when
1619 // doing the comparison both for signedness and so that the C compiler doesn't
1620 // optimize things like "p < NULL" to false (p may contain an integer value
1622 bool shouldCast = Cmp.isRelational();
1624 // Write out the casted operand if we should, otherwise just write the
1627 writeOperand(Operand);
1631 // Should this be a signed comparison? If so, convert to signed.
1632 bool castIsSigned = Cmp.isSignedPredicate();
1634 // If the operand was a pointer, convert to a large integer type.
1635 const Type* OpTy = Operand->getType();
1636 if (isa<PointerType>(OpTy))
1637 OpTy = TD->getIntPtrType();
1640 printSimpleType(Out, OpTy, castIsSigned);
1642 writeOperand(Operand);
1646 // generateCompilerSpecificCode - This is where we add conditional compilation
1647 // directives to cater to specific compilers as need be.
1649 static void generateCompilerSpecificCode(formatted_raw_ostream& Out,
1650 const TargetData *TD) {
1651 // Alloca is hard to get, and we don't want to include stdlib.h here.
1652 Out << "/* get a declaration for alloca */\n"
1653 << "#if defined(__CYGWIN__) || defined(__MINGW32__)\n"
1654 << "#define alloca(x) __builtin_alloca((x))\n"
1655 << "#define _alloca(x) __builtin_alloca((x))\n"
1656 << "#elif defined(__APPLE__)\n"
1657 << "extern void *__builtin_alloca(unsigned long);\n"
1658 << "#define alloca(x) __builtin_alloca(x)\n"
1659 << "#define longjmp _longjmp\n"
1660 << "#define setjmp _setjmp\n"
1661 << "#elif defined(__sun__)\n"
1662 << "#if defined(__sparcv9)\n"
1663 << "extern void *__builtin_alloca(unsigned long);\n"
1665 << "extern void *__builtin_alloca(unsigned int);\n"
1667 << "#define alloca(x) __builtin_alloca(x)\n"
1668 << "#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)\n"
1669 << "#define alloca(x) __builtin_alloca(x)\n"
1670 << "#elif defined(_MSC_VER)\n"
1671 << "#define inline _inline\n"
1672 << "#define alloca(x) _alloca(x)\n"
1674 << "#include <alloca.h>\n"
1677 // We output GCC specific attributes to preserve 'linkonce'ness on globals.
1678 // If we aren't being compiled with GCC, just drop these attributes.
1679 Out << "#ifndef __GNUC__ /* Can only support \"linkonce\" vars with GCC */\n"
1680 << "#define __attribute__(X)\n"
1683 // On Mac OS X, "external weak" is spelled "__attribute__((weak_import))".
1684 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1685 << "#define __EXTERNAL_WEAK__ __attribute__((weak_import))\n"
1686 << "#elif defined(__GNUC__)\n"
1687 << "#define __EXTERNAL_WEAK__ __attribute__((weak))\n"
1689 << "#define __EXTERNAL_WEAK__\n"
1692 // For now, turn off the weak linkage attribute on Mac OS X. (See above.)
1693 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1694 << "#define __ATTRIBUTE_WEAK__\n"
1695 << "#elif defined(__GNUC__)\n"
1696 << "#define __ATTRIBUTE_WEAK__ __attribute__((weak))\n"
1698 << "#define __ATTRIBUTE_WEAK__\n"
1701 // Add hidden visibility support. FIXME: APPLE_CC?
1702 Out << "#if defined(__GNUC__)\n"
1703 << "#define __HIDDEN__ __attribute__((visibility(\"hidden\")))\n"
1706 // Define NaN and Inf as GCC builtins if using GCC, as 0 otherwise
1707 // From the GCC documentation:
1709 // double __builtin_nan (const char *str)
1711 // This is an implementation of the ISO C99 function nan.
1713 // Since ISO C99 defines this function in terms of strtod, which we do
1714 // not implement, a description of the parsing is in order. The string is
1715 // parsed as by strtol; that is, the base is recognized by leading 0 or
1716 // 0x prefixes. The number parsed is placed in the significand such that
1717 // the least significant bit of the number is at the least significant
1718 // bit of the significand. The number is truncated to fit the significand
1719 // field provided. The significand is forced to be a quiet NaN.
1721 // This function, if given a string literal, is evaluated early enough
1722 // that it is considered a compile-time constant.
1724 // float __builtin_nanf (const char *str)
1726 // Similar to __builtin_nan, except the return type is float.
1728 // double __builtin_inf (void)
1730 // Similar to __builtin_huge_val, except a warning is generated if the
1731 // target floating-point format does not support infinities. This
1732 // function is suitable for implementing the ISO C99 macro INFINITY.
1734 // float __builtin_inff (void)
1736 // Similar to __builtin_inf, except the return type is float.
1737 Out << "#ifdef __GNUC__\n"
1738 << "#define LLVM_NAN(NanStr) __builtin_nan(NanStr) /* Double */\n"
1739 << "#define LLVM_NANF(NanStr) __builtin_nanf(NanStr) /* Float */\n"
1740 << "#define LLVM_NANS(NanStr) __builtin_nans(NanStr) /* Double */\n"
1741 << "#define LLVM_NANSF(NanStr) __builtin_nansf(NanStr) /* Float */\n"
1742 << "#define LLVM_INF __builtin_inf() /* Double */\n"
1743 << "#define LLVM_INFF __builtin_inff() /* Float */\n"
1744 << "#define LLVM_PREFETCH(addr,rw,locality) "
1745 "__builtin_prefetch(addr,rw,locality)\n"
1746 << "#define __ATTRIBUTE_CTOR__ __attribute__((constructor))\n"
1747 << "#define __ATTRIBUTE_DTOR__ __attribute__((destructor))\n"
1748 << "#define LLVM_ASM __asm__\n"
1750 << "#define LLVM_NAN(NanStr) ((double)0.0) /* Double */\n"
1751 << "#define LLVM_NANF(NanStr) 0.0F /* Float */\n"
1752 << "#define LLVM_NANS(NanStr) ((double)0.0) /* Double */\n"
1753 << "#define LLVM_NANSF(NanStr) 0.0F /* Float */\n"
1754 << "#define LLVM_INF ((double)0.0) /* Double */\n"
1755 << "#define LLVM_INFF 0.0F /* Float */\n"
1756 << "#define LLVM_PREFETCH(addr,rw,locality) /* PREFETCH */\n"
1757 << "#define __ATTRIBUTE_CTOR__\n"
1758 << "#define __ATTRIBUTE_DTOR__\n"
1759 << "#define LLVM_ASM(X)\n"
1762 Out << "#if __GNUC__ < 4 /* Old GCC's, or compilers not GCC */ \n"
1763 << "#define __builtin_stack_save() 0 /* not implemented */\n"
1764 << "#define __builtin_stack_restore(X) /* noop */\n"
1767 // Output typedefs for 128-bit integers. If these are needed with a
1768 // 32-bit target or with a C compiler that doesn't support mode(TI),
1769 // more drastic measures will be needed.
1770 Out << "#if __GNUC__ && __LP64__ /* 128-bit integer types */\n"
1771 << "typedef int __attribute__((mode(TI))) llvmInt128;\n"
1772 << "typedef unsigned __attribute__((mode(TI))) llvmUInt128;\n"
1775 // Output target-specific code that should be inserted into main.
1776 Out << "#define CODE_FOR_MAIN() /* Any target-specific code for main()*/\n";
1779 /// FindStaticTors - Given a static ctor/dtor list, unpack its contents into
1780 /// the StaticTors set.
1781 static void FindStaticTors(GlobalVariable *GV, std::set<Function*> &StaticTors){
1782 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
1783 if (!InitList) return;
1785 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
1786 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
1787 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
1789 if (CS->getOperand(1)->isNullValue())
1790 return; // Found a null terminator, exit printing.
1791 Constant *FP = CS->getOperand(1);
1792 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
1794 FP = CE->getOperand(0);
1795 if (Function *F = dyn_cast<Function>(FP))
1796 StaticTors.insert(F);
1800 enum SpecialGlobalClass {
1802 GlobalCtors, GlobalDtors,
1806 /// getGlobalVariableClass - If this is a global that is specially recognized
1807 /// by LLVM, return a code that indicates how we should handle it.
1808 static SpecialGlobalClass getGlobalVariableClass(const GlobalVariable *GV) {
1809 // If this is a global ctors/dtors list, handle it now.
1810 if (GV->hasAppendingLinkage() && GV->use_empty()) {
1811 if (GV->getName() == "llvm.global_ctors")
1813 else if (GV->getName() == "llvm.global_dtors")
1817 // Otherwise, it it is other metadata, don't print it. This catches things
1818 // like debug information.
1819 if (GV->getSection() == "llvm.metadata")
1826 bool CWriter::doInitialization(Module &M) {
1830 TD = new TargetData(&M);
1831 IL = new IntrinsicLowering(*TD);
1832 IL->AddPrototypes(M);
1834 // Ensure that all structure types have names...
1835 Mang = new Mangler(M);
1836 Mang->markCharUnacceptable('.');
1838 // Keep track of which functions are static ctors/dtors so they can have
1839 // an attribute added to their prototypes.
1840 std::set<Function*> StaticCtors, StaticDtors;
1841 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1843 switch (getGlobalVariableClass(I)) {
1846 FindStaticTors(I, StaticCtors);
1849 FindStaticTors(I, StaticDtors);
1854 // get declaration for alloca
1855 Out << "/* Provide Declarations */\n";
1856 Out << "#include <stdarg.h>\n"; // Varargs support
1857 Out << "#include <setjmp.h>\n"; // Unwind support
1858 generateCompilerSpecificCode(Out, TD);
1860 // Provide a definition for `bool' if not compiling with a C++ compiler.
1862 << "#ifndef __cplusplus\ntypedef unsigned char bool;\n#endif\n"
1864 << "\n\n/* Support for floating point constants */\n"
1865 << "typedef unsigned long long ConstantDoubleTy;\n"
1866 << "typedef unsigned int ConstantFloatTy;\n"
1867 << "typedef struct { unsigned long long f1; unsigned short f2; "
1868 "unsigned short pad[3]; } ConstantFP80Ty;\n"
1869 // This is used for both kinds of 128-bit long double; meaning differs.
1870 << "typedef struct { unsigned long long f1; unsigned long long f2; }"
1871 " ConstantFP128Ty;\n"
1872 << "\n\n/* Global Declarations */\n";
1874 // First output all the declarations for the program, because C requires
1875 // Functions & globals to be declared before they are used.
1878 // Loop over the symbol table, emitting all named constants...
1879 printModuleTypes(M.getTypeSymbolTable());
1881 // Global variable declarations...
1882 if (!M.global_empty()) {
1883 Out << "\n/* External Global Variable Declarations */\n";
1884 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1887 if (I->hasExternalLinkage() || I->hasExternalWeakLinkage() ||
1888 I->hasCommonLinkage())
1890 else if (I->hasDLLImportLinkage())
1891 Out << "__declspec(dllimport) ";
1893 continue; // Internal Global
1895 // Thread Local Storage
1896 if (I->isThreadLocal())
1899 printType(Out, I->getType()->getElementType(), false, GetValueName(I));
1901 if (I->hasExternalWeakLinkage())
1902 Out << " __EXTERNAL_WEAK__";
1907 // Function declarations
1908 Out << "\n/* Function Declarations */\n";
1909 Out << "double fmod(double, double);\n"; // Support for FP rem
1910 Out << "float fmodf(float, float);\n";
1911 Out << "long double fmodl(long double, long double);\n";
1913 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
1914 // Don't print declarations for intrinsic functions.
1915 if (!I->isIntrinsic() && I->getName() != "setjmp" &&
1916 I->getName() != "longjmp" && I->getName() != "_setjmp") {
1917 if (I->hasExternalWeakLinkage())
1919 printFunctionSignature(I, true);
1920 if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
1921 Out << " __ATTRIBUTE_WEAK__";
1922 if (I->hasExternalWeakLinkage())
1923 Out << " __EXTERNAL_WEAK__";
1924 if (StaticCtors.count(I))
1925 Out << " __ATTRIBUTE_CTOR__";
1926 if (StaticDtors.count(I))
1927 Out << " __ATTRIBUTE_DTOR__";
1928 if (I->hasHiddenVisibility())
1929 Out << " __HIDDEN__";
1931 if (I->hasName() && I->getName()[0] == 1)
1932 Out << " LLVM_ASM(\"" << I->getName().c_str()+1 << "\")";
1938 // Output the global variable declarations
1939 if (!M.global_empty()) {
1940 Out << "\n\n/* Global Variable Declarations */\n";
1941 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1943 if (!I->isDeclaration()) {
1944 // Ignore special globals, such as debug info.
1945 if (getGlobalVariableClass(I))
1948 if (I->hasLocalLinkage())
1953 // Thread Local Storage
1954 if (I->isThreadLocal())
1957 printType(Out, I->getType()->getElementType(), false,
1960 if (I->hasLinkOnceLinkage())
1961 Out << " __attribute__((common))";
1962 else if (I->hasCommonLinkage()) // FIXME is this right?
1963 Out << " __ATTRIBUTE_WEAK__";
1964 else if (I->hasWeakLinkage())
1965 Out << " __ATTRIBUTE_WEAK__";
1966 else if (I->hasExternalWeakLinkage())
1967 Out << " __EXTERNAL_WEAK__";
1968 if (I->hasHiddenVisibility())
1969 Out << " __HIDDEN__";
1974 // Output the global variable definitions and contents...
1975 if (!M.global_empty()) {
1976 Out << "\n\n/* Global Variable Definitions and Initialization */\n";
1977 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1979 if (!I->isDeclaration()) {
1980 // Ignore special globals, such as debug info.
1981 if (getGlobalVariableClass(I))
1984 if (I->hasLocalLinkage())
1986 else if (I->hasDLLImportLinkage())
1987 Out << "__declspec(dllimport) ";
1988 else if (I->hasDLLExportLinkage())
1989 Out << "__declspec(dllexport) ";
1991 // Thread Local Storage
1992 if (I->isThreadLocal())
1995 printType(Out, I->getType()->getElementType(), false,
1997 if (I->hasLinkOnceLinkage())
1998 Out << " __attribute__((common))";
1999 else if (I->hasWeakLinkage())
2000 Out << " __ATTRIBUTE_WEAK__";
2001 else if (I->hasCommonLinkage())
2002 Out << " __ATTRIBUTE_WEAK__";
2004 if (I->hasHiddenVisibility())
2005 Out << " __HIDDEN__";
2007 // If the initializer is not null, emit the initializer. If it is null,
2008 // we try to avoid emitting large amounts of zeros. The problem with
2009 // this, however, occurs when the variable has weak linkage. In this
2010 // case, the assembler will complain about the variable being both weak
2011 // and common, so we disable this optimization.
2012 // FIXME common linkage should avoid this problem.
2013 if (!I->getInitializer()->isNullValue()) {
2015 writeOperand(I->getInitializer(), true);
2016 } else if (I->hasWeakLinkage()) {
2017 // We have to specify an initializer, but it doesn't have to be
2018 // complete. If the value is an aggregate, print out { 0 }, and let
2019 // the compiler figure out the rest of the zeros.
2021 if (isa<StructType>(I->getInitializer()->getType()) ||
2022 isa<VectorType>(I->getInitializer()->getType())) {
2024 } else if (isa<ArrayType>(I->getInitializer()->getType())) {
2025 // As with structs and vectors, but with an extra set of braces
2026 // because arrays are wrapped in structs.
2029 // Just print it out normally.
2030 writeOperand(I->getInitializer(), true);
2038 Out << "\n\n/* Function Bodies */\n";
2040 // Emit some helper functions for dealing with FCMP instruction's
2042 Out << "static inline int llvm_fcmp_ord(double X, double Y) { ";
2043 Out << "return X == X && Y == Y; }\n";
2044 Out << "static inline int llvm_fcmp_uno(double X, double Y) { ";
2045 Out << "return X != X || Y != Y; }\n";
2046 Out << "static inline int llvm_fcmp_ueq(double X, double Y) { ";
2047 Out << "return X == Y || llvm_fcmp_uno(X, Y); }\n";
2048 Out << "static inline int llvm_fcmp_une(double X, double Y) { ";
2049 Out << "return X != Y; }\n";
2050 Out << "static inline int llvm_fcmp_ult(double X, double Y) { ";
2051 Out << "return X < Y || llvm_fcmp_uno(X, Y); }\n";
2052 Out << "static inline int llvm_fcmp_ugt(double X, double Y) { ";
2053 Out << "return X > Y || llvm_fcmp_uno(X, Y); }\n";
2054 Out << "static inline int llvm_fcmp_ule(double X, double Y) { ";
2055 Out << "return X <= Y || llvm_fcmp_uno(X, Y); }\n";
2056 Out << "static inline int llvm_fcmp_uge(double X, double Y) { ";
2057 Out << "return X >= Y || llvm_fcmp_uno(X, Y); }\n";
2058 Out << "static inline int llvm_fcmp_oeq(double X, double Y) { ";
2059 Out << "return X == Y ; }\n";
2060 Out << "static inline int llvm_fcmp_one(double X, double Y) { ";
2061 Out << "return X != Y && llvm_fcmp_ord(X, Y); }\n";
2062 Out << "static inline int llvm_fcmp_olt(double X, double Y) { ";
2063 Out << "return X < Y ; }\n";
2064 Out << "static inline int llvm_fcmp_ogt(double X, double Y) { ";
2065 Out << "return X > Y ; }\n";
2066 Out << "static inline int llvm_fcmp_ole(double X, double Y) { ";
2067 Out << "return X <= Y ; }\n";
2068 Out << "static inline int llvm_fcmp_oge(double X, double Y) { ";
2069 Out << "return X >= Y ; }\n";
2074 /// Output all floating point constants that cannot be printed accurately...
2075 void CWriter::printFloatingPointConstants(Function &F) {
2076 // Scan the module for floating point constants. If any FP constant is used
2077 // in the function, we want to redirect it here so that we do not depend on
2078 // the precision of the printed form, unless the printed form preserves
2081 for (constant_iterator I = constant_begin(&F), E = constant_end(&F);
2083 printFloatingPointConstants(*I);
2088 void CWriter::printFloatingPointConstants(const Constant *C) {
2089 // If this is a constant expression, recursively check for constant fp values.
2090 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
2091 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i)
2092 printFloatingPointConstants(CE->getOperand(i));
2096 // Otherwise, check for a FP constant that we need to print.
2097 const ConstantFP *FPC = dyn_cast<ConstantFP>(C);
2099 // Do not put in FPConstantMap if safe.
2100 isFPCSafeToPrint(FPC) ||
2101 // Already printed this constant?
2102 FPConstantMap.count(FPC))
2105 FPConstantMap[FPC] = FPCounter; // Number the FP constants
2107 if (FPC->getType() == Type::DoubleTy) {
2108 double Val = FPC->getValueAPF().convertToDouble();
2109 uint64_t i = FPC->getValueAPF().bitcastToAPInt().getZExtValue();
2110 Out << "static const ConstantDoubleTy FPConstant" << FPCounter++
2111 << " = 0x" << utohexstr(i)
2112 << "ULL; /* " << Val << " */\n";
2113 } else if (FPC->getType() == Type::FloatTy) {
2114 float Val = FPC->getValueAPF().convertToFloat();
2115 uint32_t i = (uint32_t)FPC->getValueAPF().bitcastToAPInt().
2117 Out << "static const ConstantFloatTy FPConstant" << FPCounter++
2118 << " = 0x" << utohexstr(i)
2119 << "U; /* " << Val << " */\n";
2120 } else if (FPC->getType() == Type::X86_FP80Ty) {
2121 // api needed to prevent premature destruction
2122 APInt api = FPC->getValueAPF().bitcastToAPInt();
2123 const uint64_t *p = api.getRawData();
2124 Out << "static const ConstantFP80Ty FPConstant" << FPCounter++
2125 << " = { 0x" << utohexstr(p[0])
2126 << "ULL, 0x" << utohexstr((uint16_t)p[1]) << ",{0,0,0}"
2127 << "}; /* Long double constant */\n";
2128 } else if (FPC->getType() == Type::PPC_FP128Ty) {
2129 APInt api = FPC->getValueAPF().bitcastToAPInt();
2130 const uint64_t *p = api.getRawData();
2131 Out << "static const ConstantFP128Ty FPConstant" << FPCounter++
2133 << utohexstr(p[0]) << ", 0x" << utohexstr(p[1])
2134 << "}; /* Long double constant */\n";
2137 llvm_unreachable("Unknown float type!");
2143 /// printSymbolTable - Run through symbol table looking for type names. If a
2144 /// type name is found, emit its declaration...
2146 void CWriter::printModuleTypes(const TypeSymbolTable &TST) {
2147 Out << "/* Helper union for bitcasts */\n";
2148 Out << "typedef union {\n";
2149 Out << " unsigned int Int32;\n";
2150 Out << " unsigned long long Int64;\n";
2151 Out << " float Float;\n";
2152 Out << " double Double;\n";
2153 Out << "} llvmBitCastUnion;\n";
2155 // We are only interested in the type plane of the symbol table.
2156 TypeSymbolTable::const_iterator I = TST.begin();
2157 TypeSymbolTable::const_iterator End = TST.end();
2159 // If there are no type names, exit early.
2160 if (I == End) return;
2162 // Print out forward declarations for structure types before anything else!
2163 Out << "/* Structure forward decls */\n";
2164 for (; I != End; ++I) {
2165 std::string Name = "struct l_" + Mang->makeNameProper(I->first);
2166 Out << Name << ";\n";
2167 TypeNames.insert(std::make_pair(I->second, Name));
2172 // Now we can print out typedefs. Above, we guaranteed that this can only be
2173 // for struct or opaque types.
2174 Out << "/* Typedefs */\n";
2175 for (I = TST.begin(); I != End; ++I) {
2176 std::string Name = "l_" + Mang->makeNameProper(I->first);
2178 printType(Out, I->second, false, Name);
2184 // Keep track of which structures have been printed so far...
2185 std::set<const Type *> StructPrinted;
2187 // Loop over all structures then push them into the stack so they are
2188 // printed in the correct order.
2190 Out << "/* Structure contents */\n";
2191 for (I = TST.begin(); I != End; ++I)
2192 if (isa<StructType>(I->second) || isa<ArrayType>(I->second))
2193 // Only print out used types!
2194 printContainedStructs(I->second, StructPrinted);
2197 // Push the struct onto the stack and recursively push all structs
2198 // this one depends on.
2200 // TODO: Make this work properly with vector types
2202 void CWriter::printContainedStructs(const Type *Ty,
2203 std::set<const Type*> &StructPrinted) {
2204 // Don't walk through pointers.
2205 if (isa<PointerType>(Ty) || Ty->isPrimitiveType() || Ty->isInteger()) return;
2207 // Print all contained types first.
2208 for (Type::subtype_iterator I = Ty->subtype_begin(),
2209 E = Ty->subtype_end(); I != E; ++I)
2210 printContainedStructs(*I, StructPrinted);
2212 if (isa<StructType>(Ty) || isa<ArrayType>(Ty)) {
2213 // Check to see if we have already printed this struct.
2214 if (StructPrinted.insert(Ty).second) {
2215 // Print structure type out.
2216 std::string Name = TypeNames[Ty];
2217 printType(Out, Ty, false, Name, true);
2223 void CWriter::printFunctionSignature(const Function *F, bool Prototype) {
2224 /// isStructReturn - Should this function actually return a struct by-value?
2225 bool isStructReturn = F->hasStructRetAttr();
2227 if (F->hasLocalLinkage()) Out << "static ";
2228 if (F->hasDLLImportLinkage()) Out << "__declspec(dllimport) ";
2229 if (F->hasDLLExportLinkage()) Out << "__declspec(dllexport) ";
2230 switch (F->getCallingConv()) {
2231 case CallingConv::X86_StdCall:
2232 Out << "__attribute__((stdcall)) ";
2234 case CallingConv::X86_FastCall:
2235 Out << "__attribute__((fastcall)) ";
2239 // Loop over the arguments, printing them...
2240 const FunctionType *FT = cast<FunctionType>(F->getFunctionType());
2241 const AttrListPtr &PAL = F->getAttributes();
2243 std::stringstream FunctionInnards;
2245 // Print out the name...
2246 FunctionInnards << GetValueName(F) << '(';
2248 bool PrintedArg = false;
2249 if (!F->isDeclaration()) {
2250 if (!F->arg_empty()) {
2251 Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
2254 // If this is a struct-return function, don't print the hidden
2255 // struct-return argument.
2256 if (isStructReturn) {
2257 assert(I != E && "Invalid struct return function!");
2262 std::string ArgName;
2263 for (; I != E; ++I) {
2264 if (PrintedArg) FunctionInnards << ", ";
2265 if (I->hasName() || !Prototype)
2266 ArgName = GetValueName(I);
2269 const Type *ArgTy = I->getType();
2270 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2271 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2272 ByValParams.insert(I);
2274 printType(FunctionInnards, ArgTy,
2275 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt),
2282 // Loop over the arguments, printing them.
2283 FunctionType::param_iterator I = FT->param_begin(), E = FT->param_end();
2286 // If this is a struct-return function, don't print the hidden
2287 // struct-return argument.
2288 if (isStructReturn) {
2289 assert(I != E && "Invalid struct return function!");
2294 for (; I != E; ++I) {
2295 if (PrintedArg) FunctionInnards << ", ";
2296 const Type *ArgTy = *I;
2297 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2298 assert(isa<PointerType>(ArgTy));
2299 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2301 printType(FunctionInnards, ArgTy,
2302 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt));
2308 // Finish printing arguments... if this is a vararg function, print the ...,
2309 // unless there are no known types, in which case, we just emit ().
2311 if (FT->isVarArg() && PrintedArg) {
2312 if (PrintedArg) FunctionInnards << ", ";
2313 FunctionInnards << "..."; // Output varargs portion of signature!
2314 } else if (!FT->isVarArg() && !PrintedArg) {
2315 FunctionInnards << "void"; // ret() -> ret(void) in C.
2317 FunctionInnards << ')';
2319 // Get the return tpe for the function.
2321 if (!isStructReturn)
2322 RetTy = F->getReturnType();
2324 // If this is a struct-return function, print the struct-return type.
2325 RetTy = cast<PointerType>(FT->getParamType(0))->getElementType();
2328 // Print out the return type and the signature built above.
2329 printType(Out, RetTy,
2330 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt),
2331 FunctionInnards.str());
2334 static inline bool isFPIntBitCast(const Instruction &I) {
2335 if (!isa<BitCastInst>(I))
2337 const Type *SrcTy = I.getOperand(0)->getType();
2338 const Type *DstTy = I.getType();
2339 return (SrcTy->isFloatingPoint() && DstTy->isInteger()) ||
2340 (DstTy->isFloatingPoint() && SrcTy->isInteger());
2343 void CWriter::printFunction(Function &F) {
2344 /// isStructReturn - Should this function actually return a struct by-value?
2345 bool isStructReturn = F.hasStructRetAttr();
2347 printFunctionSignature(&F, false);
2350 // If this is a struct return function, handle the result with magic.
2351 if (isStructReturn) {
2352 const Type *StructTy =
2353 cast<PointerType>(F.arg_begin()->getType())->getElementType();
2355 printType(Out, StructTy, false, "StructReturn");
2356 Out << "; /* Struct return temporary */\n";
2359 printType(Out, F.arg_begin()->getType(), false,
2360 GetValueName(F.arg_begin()));
2361 Out << " = &StructReturn;\n";
2364 bool PrintedVar = false;
2366 // print local variable information for the function
2367 for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I) {
2368 if (const AllocaInst *AI = isDirectAlloca(&*I)) {
2370 printType(Out, AI->getAllocatedType(), false, GetValueName(AI));
2371 Out << "; /* Address-exposed local */\n";
2373 } else if (I->getType() != Type::VoidTy && !isInlinableInst(*I)) {
2375 printType(Out, I->getType(), false, GetValueName(&*I));
2378 if (isa<PHINode>(*I)) { // Print out PHI node temporaries as well...
2380 printType(Out, I->getType(), false,
2381 GetValueName(&*I)+"__PHI_TEMPORARY");
2386 // We need a temporary for the BitCast to use so it can pluck a value out
2387 // of a union to do the BitCast. This is separate from the need for a
2388 // variable to hold the result of the BitCast.
2389 if (isFPIntBitCast(*I)) {
2390 Out << " llvmBitCastUnion " << GetValueName(&*I)
2391 << "__BITCAST_TEMPORARY;\n";
2399 if (F.hasExternalLinkage() && F.getName() == "main")
2400 Out << " CODE_FOR_MAIN();\n";
2402 // print the basic blocks
2403 for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
2404 if (Loop *L = LI->getLoopFor(BB)) {
2405 if (L->getHeader() == BB && L->getParentLoop() == 0)
2408 printBasicBlock(BB);
2415 void CWriter::printLoop(Loop *L) {
2416 Out << " do { /* Syntactic loop '" << L->getHeader()->getName()
2417 << "' to make GCC happy */\n";
2418 for (unsigned i = 0, e = L->getBlocks().size(); i != e; ++i) {
2419 BasicBlock *BB = L->getBlocks()[i];
2420 Loop *BBLoop = LI->getLoopFor(BB);
2422 printBasicBlock(BB);
2423 else if (BB == BBLoop->getHeader() && BBLoop->getParentLoop() == L)
2426 Out << " } while (1); /* end of syntactic loop '"
2427 << L->getHeader()->getName() << "' */\n";
2430 void CWriter::printBasicBlock(BasicBlock *BB) {
2432 // Don't print the label for the basic block if there are no uses, or if
2433 // the only terminator use is the predecessor basic block's terminator.
2434 // We have to scan the use list because PHI nodes use basic blocks too but
2435 // do not require a label to be generated.
2437 bool NeedsLabel = false;
2438 for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI)
2439 if (isGotoCodeNecessary(*PI, BB)) {
2444 if (NeedsLabel) Out << GetValueName(BB) << ":\n";
2446 // Output all of the instructions in the basic block...
2447 for (BasicBlock::iterator II = BB->begin(), E = --BB->end(); II != E;
2449 if (!isInlinableInst(*II) && !isDirectAlloca(II)) {
2450 if (II->getType() != Type::VoidTy && !isInlineAsm(*II))
2454 writeInstComputationInline(*II);
2459 // Don't emit prefix or suffix for the terminator.
2460 visit(*BB->getTerminator());
2464 // Specific Instruction type classes... note that all of the casts are
2465 // necessary because we use the instruction classes as opaque types...
2467 void CWriter::visitReturnInst(ReturnInst &I) {
2468 // If this is a struct return function, return the temporary struct.
2469 bool isStructReturn = I.getParent()->getParent()->hasStructRetAttr();
2471 if (isStructReturn) {
2472 Out << " return StructReturn;\n";
2476 // Don't output a void return if this is the last basic block in the function
2477 if (I.getNumOperands() == 0 &&
2478 &*--I.getParent()->getParent()->end() == I.getParent() &&
2479 !I.getParent()->size() == 1) {
2483 if (I.getNumOperands() > 1) {
2486 printType(Out, I.getParent()->getParent()->getReturnType());
2487 Out << " llvm_cbe_mrv_temp = {\n";
2488 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
2490 writeOperand(I.getOperand(i));
2496 Out << " return llvm_cbe_mrv_temp;\n";
2502 if (I.getNumOperands()) {
2504 writeOperand(I.getOperand(0));
2509 void CWriter::visitSwitchInst(SwitchInst &SI) {
2512 writeOperand(SI.getOperand(0));
2513 Out << ") {\n default:\n";
2514 printPHICopiesForSuccessor (SI.getParent(), SI.getDefaultDest(), 2);
2515 printBranchToBlock(SI.getParent(), SI.getDefaultDest(), 2);
2517 for (unsigned i = 2, e = SI.getNumOperands(); i != e; i += 2) {
2519 writeOperand(SI.getOperand(i));
2521 BasicBlock *Succ = cast<BasicBlock>(SI.getOperand(i+1));
2522 printPHICopiesForSuccessor (SI.getParent(), Succ, 2);
2523 printBranchToBlock(SI.getParent(), Succ, 2);
2524 if (Function::iterator(Succ) == next(Function::iterator(SI.getParent())))
2530 void CWriter::visitUnreachableInst(UnreachableInst &I) {
2531 Out << " /*UNREACHABLE*/;\n";
2534 bool CWriter::isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
2535 /// FIXME: This should be reenabled, but loop reordering safe!!
2538 if (next(Function::iterator(From)) != Function::iterator(To))
2539 return true; // Not the direct successor, we need a goto.
2541 //isa<SwitchInst>(From->getTerminator())
2543 if (LI->getLoopFor(From) != LI->getLoopFor(To))
2548 void CWriter::printPHICopiesForSuccessor (BasicBlock *CurBlock,
2549 BasicBlock *Successor,
2551 for (BasicBlock::iterator I = Successor->begin(); isa<PHINode>(I); ++I) {
2552 PHINode *PN = cast<PHINode>(I);
2553 // Now we have to do the printing.
2554 Value *IV = PN->getIncomingValueForBlock(CurBlock);
2555 if (!isa<UndefValue>(IV)) {
2556 Out << std::string(Indent, ' ');
2557 Out << " " << GetValueName(I) << "__PHI_TEMPORARY = ";
2559 Out << "; /* for PHI node */\n";
2564 void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
2566 if (isGotoCodeNecessary(CurBB, Succ)) {
2567 Out << std::string(Indent, ' ') << " goto ";
2573 // Branch instruction printing - Avoid printing out a branch to a basic block
2574 // that immediately succeeds the current one.
2576 void CWriter::visitBranchInst(BranchInst &I) {
2578 if (I.isConditional()) {
2579 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(0))) {
2581 writeOperand(I.getCondition());
2584 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 2);
2585 printBranchToBlock(I.getParent(), I.getSuccessor(0), 2);
2587 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(1))) {
2588 Out << " } else {\n";
2589 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2590 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2593 // First goto not necessary, assume second one is...
2595 writeOperand(I.getCondition());
2598 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2599 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2604 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 0);
2605 printBranchToBlock(I.getParent(), I.getSuccessor(0), 0);
2610 // PHI nodes get copied into temporary values at the end of predecessor basic
2611 // blocks. We now need to copy these temporary values into the REAL value for
2613 void CWriter::visitPHINode(PHINode &I) {
2615 Out << "__PHI_TEMPORARY";
2619 void CWriter::visitBinaryOperator(Instruction &I) {
2620 // binary instructions, shift instructions, setCond instructions.
2621 assert(!isa<PointerType>(I.getType()));
2623 // We must cast the results of binary operations which might be promoted.
2624 bool needsCast = false;
2625 if ((I.getType() == Type::Int8Ty) || (I.getType() == Type::Int16Ty)
2626 || (I.getType() == Type::FloatTy)) {
2629 printType(Out, I.getType(), false);
2633 // If this is a negation operation, print it out as such. For FP, we don't
2634 // want to print "-0.0 - X".
2635 if (BinaryOperator::isNeg(&I)) {
2637 writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
2639 } else if (BinaryOperator::isFNeg(&I)) {
2641 writeOperand(BinaryOperator::getFNegArgument(cast<BinaryOperator>(&I)));
2643 } else if (I.getOpcode() == Instruction::FRem) {
2644 // Output a call to fmod/fmodf instead of emitting a%b
2645 if (I.getType() == Type::FloatTy)
2647 else if (I.getType() == Type::DoubleTy)
2649 else // all 3 flavors of long double
2651 writeOperand(I.getOperand(0));
2653 writeOperand(I.getOperand(1));
2657 // Write out the cast of the instruction's value back to the proper type
2659 bool NeedsClosingParens = writeInstructionCast(I);
2661 // Certain instructions require the operand to be forced to a specific type
2662 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2663 // below for operand 1
2664 writeOperandWithCast(I.getOperand(0), I.getOpcode());
2666 switch (I.getOpcode()) {
2667 case Instruction::Add:
2668 case Instruction::FAdd: Out << " + "; break;
2669 case Instruction::Sub:
2670 case Instruction::FSub: Out << " - "; break;
2671 case Instruction::Mul:
2672 case Instruction::FMul: Out << " * "; break;
2673 case Instruction::URem:
2674 case Instruction::SRem:
2675 case Instruction::FRem: Out << " % "; break;
2676 case Instruction::UDiv:
2677 case Instruction::SDiv:
2678 case Instruction::FDiv: Out << " / "; break;
2679 case Instruction::And: Out << " & "; break;
2680 case Instruction::Or: Out << " | "; break;
2681 case Instruction::Xor: Out << " ^ "; break;
2682 case Instruction::Shl : Out << " << "; break;
2683 case Instruction::LShr:
2684 case Instruction::AShr: Out << " >> "; break;
2687 cerr << "Invalid operator type!" << I;
2689 llvm_unreachable(0);
2692 writeOperandWithCast(I.getOperand(1), I.getOpcode());
2693 if (NeedsClosingParens)
2702 void CWriter::visitICmpInst(ICmpInst &I) {
2703 // We must cast the results of icmp which might be promoted.
2704 bool needsCast = false;
2706 // Write out the cast of the instruction's value back to the proper type
2708 bool NeedsClosingParens = writeInstructionCast(I);
2710 // Certain icmp predicate require the operand to be forced to a specific type
2711 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2712 // below for operand 1
2713 writeOperandWithCast(I.getOperand(0), I);
2715 switch (I.getPredicate()) {
2716 case ICmpInst::ICMP_EQ: Out << " == "; break;
2717 case ICmpInst::ICMP_NE: Out << " != "; break;
2718 case ICmpInst::ICMP_ULE:
2719 case ICmpInst::ICMP_SLE: Out << " <= "; break;
2720 case ICmpInst::ICMP_UGE:
2721 case ICmpInst::ICMP_SGE: Out << " >= "; break;
2722 case ICmpInst::ICMP_ULT:
2723 case ICmpInst::ICMP_SLT: Out << " < "; break;
2724 case ICmpInst::ICMP_UGT:
2725 case ICmpInst::ICMP_SGT: Out << " > "; break;
2728 cerr << "Invalid icmp predicate!" << I;
2730 llvm_unreachable(0);
2733 writeOperandWithCast(I.getOperand(1), I);
2734 if (NeedsClosingParens)
2742 void CWriter::visitFCmpInst(FCmpInst &I) {
2743 if (I.getPredicate() == FCmpInst::FCMP_FALSE) {
2747 if (I.getPredicate() == FCmpInst::FCMP_TRUE) {
2753 switch (I.getPredicate()) {
2754 default: llvm_unreachable("Illegal FCmp predicate");
2755 case FCmpInst::FCMP_ORD: op = "ord"; break;
2756 case FCmpInst::FCMP_UNO: op = "uno"; break;
2757 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
2758 case FCmpInst::FCMP_UNE: op = "une"; break;
2759 case FCmpInst::FCMP_ULT: op = "ult"; break;
2760 case FCmpInst::FCMP_ULE: op = "ule"; break;
2761 case FCmpInst::FCMP_UGT: op = "ugt"; break;
2762 case FCmpInst::FCMP_UGE: op = "uge"; break;
2763 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
2764 case FCmpInst::FCMP_ONE: op = "one"; break;
2765 case FCmpInst::FCMP_OLT: op = "olt"; break;
2766 case FCmpInst::FCMP_OLE: op = "ole"; break;
2767 case FCmpInst::FCMP_OGT: op = "ogt"; break;
2768 case FCmpInst::FCMP_OGE: op = "oge"; break;
2771 Out << "llvm_fcmp_" << op << "(";
2772 // Write the first operand
2773 writeOperand(I.getOperand(0));
2775 // Write the second operand
2776 writeOperand(I.getOperand(1));
2780 static const char * getFloatBitCastField(const Type *Ty) {
2781 switch (Ty->getTypeID()) {
2782 default: llvm_unreachable("Invalid Type");
2783 case Type::FloatTyID: return "Float";
2784 case Type::DoubleTyID: return "Double";
2785 case Type::IntegerTyID: {
2786 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
2795 void CWriter::visitCastInst(CastInst &I) {
2796 const Type *DstTy = I.getType();
2797 const Type *SrcTy = I.getOperand(0)->getType();
2798 if (isFPIntBitCast(I)) {
2800 // These int<->float and long<->double casts need to be handled specially
2801 Out << GetValueName(&I) << "__BITCAST_TEMPORARY."
2802 << getFloatBitCastField(I.getOperand(0)->getType()) << " = ";
2803 writeOperand(I.getOperand(0));
2804 Out << ", " << GetValueName(&I) << "__BITCAST_TEMPORARY."
2805 << getFloatBitCastField(I.getType());
2811 printCast(I.getOpcode(), SrcTy, DstTy);
2813 // Make a sext from i1 work by subtracting the i1 from 0 (an int).
2814 if (SrcTy == Type::Int1Ty && I.getOpcode() == Instruction::SExt)
2817 writeOperand(I.getOperand(0));
2819 if (DstTy == Type::Int1Ty &&
2820 (I.getOpcode() == Instruction::Trunc ||
2821 I.getOpcode() == Instruction::FPToUI ||
2822 I.getOpcode() == Instruction::FPToSI ||
2823 I.getOpcode() == Instruction::PtrToInt)) {
2824 // Make sure we really get a trunc to bool by anding the operand with 1
2830 void CWriter::visitSelectInst(SelectInst &I) {
2832 writeOperand(I.getCondition());
2834 writeOperand(I.getTrueValue());
2836 writeOperand(I.getFalseValue());
2841 void CWriter::lowerIntrinsics(Function &F) {
2842 // This is used to keep track of intrinsics that get generated to a lowered
2843 // function. We must generate the prototypes before the function body which
2844 // will only be expanded on first use (by the loop below).
2845 std::vector<Function*> prototypesToGen;
2847 // Examine all the instructions in this function to find the intrinsics that
2848 // need to be lowered.
2849 for (Function::iterator BB = F.begin(), EE = F.end(); BB != EE; ++BB)
2850 for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; )
2851 if (CallInst *CI = dyn_cast<CallInst>(I++))
2852 if (Function *F = CI->getCalledFunction())
2853 switch (F->getIntrinsicID()) {
2854 case Intrinsic::not_intrinsic:
2855 case Intrinsic::memory_barrier:
2856 case Intrinsic::vastart:
2857 case Intrinsic::vacopy:
2858 case Intrinsic::vaend:
2859 case Intrinsic::returnaddress:
2860 case Intrinsic::frameaddress:
2861 case Intrinsic::setjmp:
2862 case Intrinsic::longjmp:
2863 case Intrinsic::prefetch:
2864 case Intrinsic::dbg_stoppoint:
2865 case Intrinsic::powi:
2866 case Intrinsic::x86_sse_cmp_ss:
2867 case Intrinsic::x86_sse_cmp_ps:
2868 case Intrinsic::x86_sse2_cmp_sd:
2869 case Intrinsic::x86_sse2_cmp_pd:
2870 case Intrinsic::ppc_altivec_lvsl:
2871 // We directly implement these intrinsics
2874 // If this is an intrinsic that directly corresponds to a GCC
2875 // builtin, we handle it.
2876 const char *BuiltinName = "";
2877 #define GET_GCC_BUILTIN_NAME
2878 #include "llvm/Intrinsics.gen"
2879 #undef GET_GCC_BUILTIN_NAME
2880 // If we handle it, don't lower it.
2881 if (BuiltinName[0]) break;
2883 // All other intrinsic calls we must lower.
2884 Instruction *Before = 0;
2885 if (CI != &BB->front())
2886 Before = prior(BasicBlock::iterator(CI));
2888 IL->LowerIntrinsicCall(CI);
2889 if (Before) { // Move iterator to instruction after call
2894 // If the intrinsic got lowered to another call, and that call has
2895 // a definition then we need to make sure its prototype is emitted
2896 // before any calls to it.
2897 if (CallInst *Call = dyn_cast<CallInst>(I))
2898 if (Function *NewF = Call->getCalledFunction())
2899 if (!NewF->isDeclaration())
2900 prototypesToGen.push_back(NewF);
2905 // We may have collected some prototypes to emit in the loop above.
2906 // Emit them now, before the function that uses them is emitted. But,
2907 // be careful not to emit them twice.
2908 std::vector<Function*>::iterator I = prototypesToGen.begin();
2909 std::vector<Function*>::iterator E = prototypesToGen.end();
2910 for ( ; I != E; ++I) {
2911 if (intrinsicPrototypesAlreadyGenerated.insert(*I).second) {
2913 printFunctionSignature(*I, true);
2919 void CWriter::visitCallInst(CallInst &I) {
2920 if (isa<InlineAsm>(I.getOperand(0)))
2921 return visitInlineAsm(I);
2923 bool WroteCallee = false;
2925 // Handle intrinsic function calls first...
2926 if (Function *F = I.getCalledFunction())
2927 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
2928 if (visitBuiltinCall(I, ID, WroteCallee))
2931 Value *Callee = I.getCalledValue();
2933 const PointerType *PTy = cast<PointerType>(Callee->getType());
2934 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
2936 // If this is a call to a struct-return function, assign to the first
2937 // parameter instead of passing it to the call.
2938 const AttrListPtr &PAL = I.getAttributes();
2939 bool hasByVal = I.hasByValArgument();
2940 bool isStructRet = I.hasStructRetAttr();
2942 writeOperandDeref(I.getOperand(1));
2946 if (I.isTailCall()) Out << " /*tail*/ ";
2949 // If this is an indirect call to a struct return function, we need to cast
2950 // the pointer. Ditto for indirect calls with byval arguments.
2951 bool NeedsCast = (hasByVal || isStructRet) && !isa<Function>(Callee);
2953 // GCC is a real PITA. It does not permit codegening casts of functions to
2954 // function pointers if they are in a call (it generates a trap instruction
2955 // instead!). We work around this by inserting a cast to void* in between
2956 // the function and the function pointer cast. Unfortunately, we can't just
2957 // form the constant expression here, because the folder will immediately
2960 // Note finally, that this is completely unsafe. ANSI C does not guarantee
2961 // that void* and function pointers have the same size. :( To deal with this
2962 // in the common case, we handle casts where the number of arguments passed
2965 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Callee))
2967 if (Function *RF = dyn_cast<Function>(CE->getOperand(0))) {
2973 // Ok, just cast the pointer type.
2976 printStructReturnPointerFunctionType(Out, PAL,
2977 cast<PointerType>(I.getCalledValue()->getType()));
2979 printType(Out, I.getCalledValue()->getType(), false, "", true, PAL);
2981 printType(Out, I.getCalledValue()->getType());
2984 writeOperand(Callee);
2985 if (NeedsCast) Out << ')';
2990 unsigned NumDeclaredParams = FTy->getNumParams();
2992 CallSite::arg_iterator AI = I.op_begin()+1, AE = I.op_end();
2994 if (isStructRet) { // Skip struct return argument.
2999 bool PrintedArg = false;
3000 for (; AI != AE; ++AI, ++ArgNo) {
3001 if (PrintedArg) Out << ", ";
3002 if (ArgNo < NumDeclaredParams &&
3003 (*AI)->getType() != FTy->getParamType(ArgNo)) {
3005 printType(Out, FTy->getParamType(ArgNo),
3006 /*isSigned=*/PAL.paramHasAttr(ArgNo+1, Attribute::SExt));
3009 // Check if the argument is expected to be passed by value.
3010 if (I.paramHasAttr(ArgNo+1, Attribute::ByVal))
3011 writeOperandDeref(*AI);
3019 /// visitBuiltinCall - Handle the call to the specified builtin. Returns true
3020 /// if the entire call is handled, return false it it wasn't handled, and
3021 /// optionally set 'WroteCallee' if the callee has already been printed out.
3022 bool CWriter::visitBuiltinCall(CallInst &I, Intrinsic::ID ID,
3023 bool &WroteCallee) {
3026 // If this is an intrinsic that directly corresponds to a GCC
3027 // builtin, we emit it here.
3028 const char *BuiltinName = "";
3029 Function *F = I.getCalledFunction();
3030 #define GET_GCC_BUILTIN_NAME
3031 #include "llvm/Intrinsics.gen"
3032 #undef GET_GCC_BUILTIN_NAME
3033 assert(BuiltinName[0] && "Unknown LLVM intrinsic!");
3039 case Intrinsic::memory_barrier:
3040 Out << "__sync_synchronize()";
3042 case Intrinsic::vastart:
3045 Out << "va_start(*(va_list*)";
3046 writeOperand(I.getOperand(1));
3048 // Output the last argument to the enclosing function.
3049 if (I.getParent()->getParent()->arg_empty()) {
3051 raw_string_ostream Msg(msg);
3052 Msg << "The C backend does not currently support zero "
3053 << "argument varargs functions, such as '"
3054 << I.getParent()->getParent()->getName() << "'!";
3055 llvm_report_error(Msg.str());
3057 writeOperand(--I.getParent()->getParent()->arg_end());
3060 case Intrinsic::vaend:
3061 if (!isa<ConstantPointerNull>(I.getOperand(1))) {
3062 Out << "0; va_end(*(va_list*)";
3063 writeOperand(I.getOperand(1));
3066 Out << "va_end(*(va_list*)0)";
3069 case Intrinsic::vacopy:
3071 Out << "va_copy(*(va_list*)";
3072 writeOperand(I.getOperand(1));
3073 Out << ", *(va_list*)";
3074 writeOperand(I.getOperand(2));
3077 case Intrinsic::returnaddress:
3078 Out << "__builtin_return_address(";
3079 writeOperand(I.getOperand(1));
3082 case Intrinsic::frameaddress:
3083 Out << "__builtin_frame_address(";
3084 writeOperand(I.getOperand(1));
3087 case Intrinsic::powi:
3088 Out << "__builtin_powi(";
3089 writeOperand(I.getOperand(1));
3091 writeOperand(I.getOperand(2));
3094 case Intrinsic::setjmp:
3095 Out << "setjmp(*(jmp_buf*)";
3096 writeOperand(I.getOperand(1));
3099 case Intrinsic::longjmp:
3100 Out << "longjmp(*(jmp_buf*)";
3101 writeOperand(I.getOperand(1));
3103 writeOperand(I.getOperand(2));
3106 case Intrinsic::prefetch:
3107 Out << "LLVM_PREFETCH((const void *)";
3108 writeOperand(I.getOperand(1));
3110 writeOperand(I.getOperand(2));
3112 writeOperand(I.getOperand(3));
3115 case Intrinsic::stacksave:
3116 // Emit this as: Val = 0; *((void**)&Val) = __builtin_stack_save()
3117 // to work around GCC bugs (see PR1809).
3118 Out << "0; *((void**)&" << GetValueName(&I)
3119 << ") = __builtin_stack_save()";
3121 case Intrinsic::dbg_stoppoint: {
3122 // If we use writeOperand directly we get a "u" suffix which is rejected
3124 std::stringstream SPIStr;
3125 DbgStopPointInst &SPI = cast<DbgStopPointInst>(I);
3126 SPI.getDirectory()->print(SPIStr);
3130 Out << SPIStr.str();
3132 SPI.getFileName()->print(SPIStr);
3133 Out << SPIStr.str() << "\"\n";
3136 case Intrinsic::x86_sse_cmp_ss:
3137 case Intrinsic::x86_sse_cmp_ps:
3138 case Intrinsic::x86_sse2_cmp_sd:
3139 case Intrinsic::x86_sse2_cmp_pd:
3141 printType(Out, I.getType());
3143 // Multiple GCC builtins multiplex onto this intrinsic.
3144 switch (cast<ConstantInt>(I.getOperand(3))->getZExtValue()) {
3145 default: llvm_unreachable("Invalid llvm.x86.sse.cmp!");
3146 case 0: Out << "__builtin_ia32_cmpeq"; break;
3147 case 1: Out << "__builtin_ia32_cmplt"; break;
3148 case 2: Out << "__builtin_ia32_cmple"; break;
3149 case 3: Out << "__builtin_ia32_cmpunord"; break;
3150 case 4: Out << "__builtin_ia32_cmpneq"; break;
3151 case 5: Out << "__builtin_ia32_cmpnlt"; break;
3152 case 6: Out << "__builtin_ia32_cmpnle"; break;
3153 case 7: Out << "__builtin_ia32_cmpord"; break;
3155 if (ID == Intrinsic::x86_sse_cmp_ps || ID == Intrinsic::x86_sse2_cmp_pd)
3159 if (ID == Intrinsic::x86_sse_cmp_ss || ID == Intrinsic::x86_sse_cmp_ps)
3165 writeOperand(I.getOperand(1));
3167 writeOperand(I.getOperand(2));
3170 case Intrinsic::ppc_altivec_lvsl:
3172 printType(Out, I.getType());
3174 Out << "__builtin_altivec_lvsl(0, (void*)";
3175 writeOperand(I.getOperand(1));
3181 //This converts the llvm constraint string to something gcc is expecting.
3182 //TODO: work out platform independent constraints and factor those out
3183 // of the per target tables
3184 // handle multiple constraint codes
3185 std::string CWriter::InterpretASMConstraint(InlineAsm::ConstraintInfo& c) {
3187 assert(c.Codes.size() == 1 && "Too many asm constraint codes to handle");
3189 const char *const *table = 0;
3191 // Grab the translation table from TargetAsmInfo if it exists.
3194 const Target *Match =
3195 TargetRegistry::getClosestStaticTargetForModule(*TheModule, E);
3197 // Per platform Target Machines don't exist, so create it;
3198 // this must be done only once.
3199 const TargetMachine* TM = Match->createTargetMachine(*TheModule, "");
3200 TAsm = TM->getTargetAsmInfo();
3204 table = TAsm->getAsmCBE();
3206 // Search the translation table if it exists.
3207 for (int i = 0; table && table[i]; i += 2)
3208 if (c.Codes[0] == table[i])
3211 // Default is identity.
3215 //TODO: import logic from AsmPrinter.cpp
3216 static std::string gccifyAsm(std::string asmstr) {
3217 for (std::string::size_type i = 0; i != asmstr.size(); ++i)
3218 if (asmstr[i] == '\n')
3219 asmstr.replace(i, 1, "\\n");
3220 else if (asmstr[i] == '\t')
3221 asmstr.replace(i, 1, "\\t");
3222 else if (asmstr[i] == '$') {
3223 if (asmstr[i + 1] == '{') {
3224 std::string::size_type a = asmstr.find_first_of(':', i + 1);
3225 std::string::size_type b = asmstr.find_first_of('}', i + 1);
3226 std::string n = "%" +
3227 asmstr.substr(a + 1, b - a - 1) +
3228 asmstr.substr(i + 2, a - i - 2);
3229 asmstr.replace(i, b - i + 1, n);
3232 asmstr.replace(i, 1, "%");
3234 else if (asmstr[i] == '%')//grr
3235 { asmstr.replace(i, 1, "%%"); ++i;}
3240 //TODO: assumptions about what consume arguments from the call are likely wrong
3241 // handle communitivity
3242 void CWriter::visitInlineAsm(CallInst &CI) {
3243 InlineAsm* as = cast<InlineAsm>(CI.getOperand(0));
3244 std::vector<InlineAsm::ConstraintInfo> Constraints = as->ParseConstraints();
3246 std::vector<std::pair<Value*, int> > ResultVals;
3247 if (CI.getType() == Type::VoidTy)
3249 else if (const StructType *ST = dyn_cast<StructType>(CI.getType())) {
3250 for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i)
3251 ResultVals.push_back(std::make_pair(&CI, (int)i));
3253 ResultVals.push_back(std::make_pair(&CI, -1));
3256 // Fix up the asm string for gcc and emit it.
3257 Out << "__asm__ volatile (\"" << gccifyAsm(as->getAsmString()) << "\"\n";
3260 unsigned ValueCount = 0;
3261 bool IsFirst = true;
3263 // Convert over all the output constraints.
3264 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3265 E = Constraints.end(); I != E; ++I) {
3267 if (I->Type != InlineAsm::isOutput) {
3269 continue; // Ignore non-output constraints.
3272 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3273 std::string C = InterpretASMConstraint(*I);
3274 if (C.empty()) continue;
3285 if (ValueCount < ResultVals.size()) {
3286 DestVal = ResultVals[ValueCount].first;
3287 DestValNo = ResultVals[ValueCount].second;
3289 DestVal = CI.getOperand(ValueCount-ResultVals.size()+1);
3291 if (I->isEarlyClobber)
3294 Out << "\"=" << C << "\"(" << GetValueName(DestVal);
3295 if (DestValNo != -1)
3296 Out << ".field" << DestValNo; // Multiple retvals.
3302 // Convert over all the input constraints.
3306 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3307 E = Constraints.end(); I != E; ++I) {
3308 if (I->Type != InlineAsm::isInput) {
3310 continue; // Ignore non-input constraints.
3313 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3314 std::string C = InterpretASMConstraint(*I);
3315 if (C.empty()) continue;
3322 assert(ValueCount >= ResultVals.size() && "Input can't refer to result");
3323 Value *SrcVal = CI.getOperand(ValueCount-ResultVals.size()+1);
3325 Out << "\"" << C << "\"(";
3327 writeOperand(SrcVal);
3329 writeOperandDeref(SrcVal);
3333 // Convert over the clobber constraints.
3336 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3337 E = Constraints.end(); I != E; ++I) {
3338 if (I->Type != InlineAsm::isClobber)
3339 continue; // Ignore non-input constraints.
3341 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3342 std::string C = InterpretASMConstraint(*I);
3343 if (C.empty()) continue;
3350 Out << '\"' << C << '"';
3356 void CWriter::visitMallocInst(MallocInst &I) {
3357 llvm_unreachable("lowerallocations pass didn't work!");
3360 void CWriter::visitAllocaInst(AllocaInst &I) {
3362 printType(Out, I.getType());
3363 Out << ") alloca(sizeof(";
3364 printType(Out, I.getType()->getElementType());
3366 if (I.isArrayAllocation()) {
3368 writeOperand(I.getOperand(0));
3373 void CWriter::visitFreeInst(FreeInst &I) {
3374 llvm_unreachable("lowerallocations pass didn't work!");
3377 void CWriter::printGEPExpression(Value *Ptr, gep_type_iterator I,
3378 gep_type_iterator E, bool Static) {
3380 // If there are no indices, just print out the pointer.
3386 // Find out if the last index is into a vector. If so, we have to print this
3387 // specially. Since vectors can't have elements of indexable type, only the
3388 // last index could possibly be of a vector element.
3389 const VectorType *LastIndexIsVector = 0;
3391 for (gep_type_iterator TmpI = I; TmpI != E; ++TmpI)
3392 LastIndexIsVector = dyn_cast<VectorType>(*TmpI);
3397 // If the last index is into a vector, we can't print it as &a[i][j] because
3398 // we can't index into a vector with j in GCC. Instead, emit this as
3399 // (((float*)&a[i])+j)
3400 if (LastIndexIsVector) {
3402 printType(Out, PointerType::getUnqual(LastIndexIsVector->getElementType()));
3408 // If the first index is 0 (very typical) we can do a number of
3409 // simplifications to clean up the code.
3410 Value *FirstOp = I.getOperand();
3411 if (!isa<Constant>(FirstOp) || !cast<Constant>(FirstOp)->isNullValue()) {
3412 // First index isn't simple, print it the hard way.
3415 ++I; // Skip the zero index.
3417 // Okay, emit the first operand. If Ptr is something that is already address
3418 // exposed, like a global, avoid emitting (&foo)[0], just emit foo instead.
3419 if (isAddressExposed(Ptr)) {
3420 writeOperandInternal(Ptr, Static);
3421 } else if (I != E && isa<StructType>(*I)) {
3422 // If we didn't already emit the first operand, see if we can print it as
3423 // P->f instead of "P[0].f"
3425 Out << "->field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3426 ++I; // eat the struct index as well.
3428 // Instead of emitting P[0][1], emit (*P)[1], which is more idiomatic.
3435 for (; I != E; ++I) {
3436 if (isa<StructType>(*I)) {
3437 Out << ".field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3438 } else if (isa<ArrayType>(*I)) {
3440 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3442 } else if (!isa<VectorType>(*I)) {
3444 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3447 // If the last index is into a vector, then print it out as "+j)". This
3448 // works with the 'LastIndexIsVector' code above.
3449 if (isa<Constant>(I.getOperand()) &&
3450 cast<Constant>(I.getOperand())->isNullValue()) {
3451 Out << "))"; // avoid "+0".
3454 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3462 void CWriter::writeMemoryAccess(Value *Operand, const Type *OperandType,
3463 bool IsVolatile, unsigned Alignment) {
3465 bool IsUnaligned = Alignment &&
3466 Alignment < TD->getABITypeAlignment(OperandType);
3470 if (IsVolatile || IsUnaligned) {
3473 Out << "struct __attribute__ ((packed, aligned(" << Alignment << "))) {";
3474 printType(Out, OperandType, false, IsUnaligned ? "data" : "volatile*");
3477 if (IsVolatile) Out << "volatile ";
3483 writeOperand(Operand);
3485 if (IsVolatile || IsUnaligned) {
3492 void CWriter::visitLoadInst(LoadInst &I) {
3493 writeMemoryAccess(I.getOperand(0), I.getType(), I.isVolatile(),
3498 void CWriter::visitStoreInst(StoreInst &I) {
3499 writeMemoryAccess(I.getPointerOperand(), I.getOperand(0)->getType(),
3500 I.isVolatile(), I.getAlignment());
3502 Value *Operand = I.getOperand(0);
3503 Constant *BitMask = 0;
3504 if (const IntegerType* ITy = dyn_cast<IntegerType>(Operand->getType()))
3505 if (!ITy->isPowerOf2ByteWidth())
3506 // We have a bit width that doesn't match an even power-of-2 byte
3507 // size. Consequently we must & the value with the type's bit mask
3508 BitMask = Context->getConstantInt(ITy, ITy->getBitMask());
3511 writeOperand(Operand);
3514 printConstant(BitMask, false);
3519 void CWriter::visitGetElementPtrInst(GetElementPtrInst &I) {
3520 printGEPExpression(I.getPointerOperand(), gep_type_begin(I),
3521 gep_type_end(I), false);
3524 void CWriter::visitVAArgInst(VAArgInst &I) {
3525 Out << "va_arg(*(va_list*)";
3526 writeOperand(I.getOperand(0));
3528 printType(Out, I.getType());
3532 void CWriter::visitInsertElementInst(InsertElementInst &I) {
3533 const Type *EltTy = I.getType()->getElementType();
3534 writeOperand(I.getOperand(0));
3537 printType(Out, PointerType::getUnqual(EltTy));
3538 Out << ")(&" << GetValueName(&I) << "))[";
3539 writeOperand(I.getOperand(2));
3541 writeOperand(I.getOperand(1));
3545 void CWriter::visitExtractElementInst(ExtractElementInst &I) {
3546 // We know that our operand is not inlined.
3549 cast<VectorType>(I.getOperand(0)->getType())->getElementType();
3550 printType(Out, PointerType::getUnqual(EltTy));
3551 Out << ")(&" << GetValueName(I.getOperand(0)) << "))[";
3552 writeOperand(I.getOperand(1));
3556 void CWriter::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
3558 printType(Out, SVI.getType());
3560 const VectorType *VT = SVI.getType();
3561 unsigned NumElts = VT->getNumElements();
3562 const Type *EltTy = VT->getElementType();
3564 for (unsigned i = 0; i != NumElts; ++i) {
3566 int SrcVal = SVI.getMaskValue(i);
3567 if ((unsigned)SrcVal >= NumElts*2) {
3568 Out << " 0/*undef*/ ";
3570 Value *Op = SVI.getOperand((unsigned)SrcVal >= NumElts);
3571 if (isa<Instruction>(Op)) {
3572 // Do an extractelement of this value from the appropriate input.
3574 printType(Out, PointerType::getUnqual(EltTy));
3575 Out << ")(&" << GetValueName(Op)
3576 << "))[" << (SrcVal & (NumElts-1)) << "]";
3577 } else if (isa<ConstantAggregateZero>(Op) || isa<UndefValue>(Op)) {
3580 printConstant(cast<ConstantVector>(Op)->getOperand(SrcVal &
3589 void CWriter::visitInsertValueInst(InsertValueInst &IVI) {
3590 // Start by copying the entire aggregate value into the result variable.
3591 writeOperand(IVI.getOperand(0));
3594 // Then do the insert to update the field.
3595 Out << GetValueName(&IVI);
3596 for (const unsigned *b = IVI.idx_begin(), *i = b, *e = IVI.idx_end();
3598 const Type *IndexedTy =
3599 ExtractValueInst::getIndexedType(IVI.getOperand(0)->getType(), b, i+1);
3600 if (isa<ArrayType>(IndexedTy))
3601 Out << ".array[" << *i << "]";
3603 Out << ".field" << *i;
3606 writeOperand(IVI.getOperand(1));
3609 void CWriter::visitExtractValueInst(ExtractValueInst &EVI) {
3611 if (isa<UndefValue>(EVI.getOperand(0))) {
3613 printType(Out, EVI.getType());
3614 Out << ") 0/*UNDEF*/";
3616 Out << GetValueName(EVI.getOperand(0));
3617 for (const unsigned *b = EVI.idx_begin(), *i = b, *e = EVI.idx_end();
3619 const Type *IndexedTy =
3620 ExtractValueInst::getIndexedType(EVI.getOperand(0)->getType(), b, i+1);
3621 if (isa<ArrayType>(IndexedTy))
3622 Out << ".array[" << *i << "]";
3624 Out << ".field" << *i;
3630 //===----------------------------------------------------------------------===//
3631 // External Interface declaration
3632 //===----------------------------------------------------------------------===//
3634 bool CTargetMachine::addPassesToEmitWholeFile(PassManager &PM,
3635 formatted_raw_ostream &o,
3636 CodeGenFileType FileType,
3637 CodeGenOpt::Level OptLevel) {
3638 if (FileType != TargetMachine::AssemblyFile) return true;
3640 PM.add(createGCLoweringPass());
3641 PM.add(createLowerAllocationsPass(true));
3642 PM.add(createLowerInvokePass());
3643 PM.add(createCFGSimplificationPass()); // clean up after lower invoke.
3644 PM.add(new CBackendNameAllUsedStructsAndMergeFunctions());
3645 PM.add(new CWriter(o));
3646 PM.add(createGCInfoDeleter());