1 //===-- CBackend.cpp - Library for converting LLVM code to C --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This library converts LLVM code to C code, compilable by GCC and other C
13 //===----------------------------------------------------------------------===//
15 #include "CTargetMachine.h"
16 #include "llvm/CallingConv.h"
17 #include "llvm/Constants.h"
18 #include "llvm/DerivedTypes.h"
19 #include "llvm/Module.h"
20 #include "llvm/Instructions.h"
21 #include "llvm/Pass.h"
22 #include "llvm/PassManager.h"
23 #include "llvm/TypeSymbolTable.h"
24 #include "llvm/Intrinsics.h"
25 #include "llvm/IntrinsicInst.h"
26 #include "llvm/InlineAsm.h"
27 #include "llvm/ADT/StringExtras.h"
28 #include "llvm/ADT/STLExtras.h"
29 #include "llvm/Analysis/ConstantsScanner.h"
30 #include "llvm/Analysis/FindUsedTypes.h"
31 #include "llvm/Analysis/LoopInfo.h"
32 #include "llvm/Analysis/ValueTracking.h"
33 #include "llvm/CodeGen/Passes.h"
34 #include "llvm/CodeGen/IntrinsicLowering.h"
35 #include "llvm/Transforms/Scalar.h"
36 #include "llvm/MC/MCAsmInfo.h"
37 #include "llvm/Target/TargetData.h"
38 #include "llvm/Target/TargetRegistry.h"
39 #include "llvm/Support/CallSite.h"
40 #include "llvm/Support/CFG.h"
41 #include "llvm/Support/ErrorHandling.h"
42 #include "llvm/Support/FormattedStream.h"
43 #include "llvm/Support/GetElementPtrTypeIterator.h"
44 #include "llvm/Support/InstVisitor.h"
45 #include "llvm/Support/Mangler.h"
46 #include "llvm/Support/MathExtras.h"
47 #include "llvm/System/Host.h"
48 #include "llvm/Config/config.h"
53 extern "C" void LLVMInitializeCBackendTarget() {
54 // Register the target.
55 RegisterTargetMachine<CTargetMachine> X(TheCBackendTarget);
59 /// CBackendNameAllUsedStructsAndMergeFunctions - This pass inserts names for
60 /// any unnamed structure types that are used by the program, and merges
61 /// external functions with the same name.
63 class CBackendNameAllUsedStructsAndMergeFunctions : public ModulePass {
66 CBackendNameAllUsedStructsAndMergeFunctions()
68 void getAnalysisUsage(AnalysisUsage &AU) const {
69 AU.addRequired<FindUsedTypes>();
72 virtual const char *getPassName() const {
73 return "C backend type canonicalizer";
76 virtual bool runOnModule(Module &M);
79 char CBackendNameAllUsedStructsAndMergeFunctions::ID = 0;
81 /// CWriter - This class is the main chunk of code that converts an LLVM
82 /// module to a C translation unit.
83 class CWriter : public FunctionPass, public InstVisitor<CWriter> {
84 formatted_raw_ostream &Out;
85 IntrinsicLowering *IL;
88 const Module *TheModule;
89 const MCAsmInfo* TAsm;
91 std::map<const Type *, std::string> TypeNames;
92 std::map<const ConstantFP *, unsigned> FPConstantMap;
93 std::set<Function*> intrinsicPrototypesAlreadyGenerated;
94 std::set<const Argument*> ByValParams;
96 unsigned OpaqueCounter;
97 DenseMap<const Value*, unsigned> AnonValueNumbers;
98 unsigned NextAnonValueNumber;
102 explicit CWriter(formatted_raw_ostream &o)
103 : FunctionPass(&ID), Out(o), IL(0), Mang(0), LI(0),
104 TheModule(0), TAsm(0), TD(0), OpaqueCounter(0), NextAnonValueNumber(0) {
108 virtual const char *getPassName() const { return "C backend"; }
110 void getAnalysisUsage(AnalysisUsage &AU) const {
111 AU.addRequired<LoopInfo>();
112 AU.setPreservesAll();
115 virtual bool doInitialization(Module &M);
117 bool runOnFunction(Function &F) {
118 // Do not codegen any 'available_externally' functions at all, they have
119 // definitions outside the translation unit.
120 if (F.hasAvailableExternallyLinkage())
123 LI = &getAnalysis<LoopInfo>();
125 // Get rid of intrinsics we can't handle.
128 // Output all floating point constants that cannot be printed accurately.
129 printFloatingPointConstants(F);
135 virtual bool doFinalization(Module &M) {
140 FPConstantMap.clear();
143 intrinsicPrototypesAlreadyGenerated.clear();
147 raw_ostream &printType(formatted_raw_ostream &Out,
149 bool isSigned = false,
150 const std::string &VariableName = "",
151 bool IgnoreName = false,
152 const AttrListPtr &PAL = AttrListPtr());
153 std::ostream &printType(std::ostream &Out, const Type *Ty,
154 bool isSigned = false,
155 const std::string &VariableName = "",
156 bool IgnoreName = false,
157 const AttrListPtr &PAL = AttrListPtr());
158 raw_ostream &printSimpleType(formatted_raw_ostream &Out,
161 const std::string &NameSoFar = "");
162 std::ostream &printSimpleType(std::ostream &Out, const Type *Ty,
164 const std::string &NameSoFar = "");
166 void printStructReturnPointerFunctionType(formatted_raw_ostream &Out,
167 const AttrListPtr &PAL,
168 const PointerType *Ty);
170 /// writeOperandDeref - Print the result of dereferencing the specified
171 /// operand with '*'. This is equivalent to printing '*' then using
172 /// writeOperand, but avoids excess syntax in some cases.
173 void writeOperandDeref(Value *Operand) {
174 if (isAddressExposed(Operand)) {
175 // Already something with an address exposed.
176 writeOperandInternal(Operand);
179 writeOperand(Operand);
184 void writeOperand(Value *Operand, bool Static = false);
185 void writeInstComputationInline(Instruction &I);
186 void writeOperandInternal(Value *Operand, bool Static = false);
187 void writeOperandWithCast(Value* Operand, unsigned Opcode);
188 void writeOperandWithCast(Value* Operand, const ICmpInst &I);
189 bool writeInstructionCast(const Instruction &I);
191 void writeMemoryAccess(Value *Operand, const Type *OperandType,
192 bool IsVolatile, unsigned Alignment);
195 std::string InterpretASMConstraint(InlineAsm::ConstraintInfo& c);
197 void lowerIntrinsics(Function &F);
199 void printModule(Module *M);
200 void printModuleTypes(const TypeSymbolTable &ST);
201 void printContainedStructs(const Type *Ty, std::set<const Type *> &);
202 void printFloatingPointConstants(Function &F);
203 void printFloatingPointConstants(const Constant *C);
204 void printFunctionSignature(const Function *F, bool Prototype);
206 void printFunction(Function &);
207 void printBasicBlock(BasicBlock *BB);
208 void printLoop(Loop *L);
210 void printCast(unsigned opcode, const Type *SrcTy, const Type *DstTy);
211 void printConstant(Constant *CPV, bool Static);
212 void printConstantWithCast(Constant *CPV, unsigned Opcode);
213 bool printConstExprCast(const ConstantExpr *CE, bool Static);
214 void printConstantArray(ConstantArray *CPA, bool Static);
215 void printConstantVector(ConstantVector *CV, bool Static);
217 /// isAddressExposed - Return true if the specified value's name needs to
218 /// have its address taken in order to get a C value of the correct type.
219 /// This happens for global variables, byval parameters, and direct allocas.
220 bool isAddressExposed(const Value *V) const {
221 if (const Argument *A = dyn_cast<Argument>(V))
222 return ByValParams.count(A);
223 return isa<GlobalVariable>(V) || isDirectAlloca(V);
226 // isInlinableInst - Attempt to inline instructions into their uses to build
227 // trees as much as possible. To do this, we have to consistently decide
228 // what is acceptable to inline, so that variable declarations don't get
229 // printed and an extra copy of the expr is not emitted.
231 static bool isInlinableInst(const Instruction &I) {
232 // Always inline cmp instructions, even if they are shared by multiple
233 // expressions. GCC generates horrible code if we don't.
237 // Must be an expression, must be used exactly once. If it is dead, we
238 // emit it inline where it would go.
239 if (I.getType() == Type::getVoidTy(I.getContext()) || !I.hasOneUse() ||
240 isa<TerminatorInst>(I) || isa<CallInst>(I) || isa<PHINode>(I) ||
241 isa<LoadInst>(I) || isa<VAArgInst>(I) || isa<InsertElementInst>(I) ||
242 isa<InsertValueInst>(I))
243 // Don't inline a load across a store or other bad things!
246 // Must not be used in inline asm, extractelement, or shufflevector.
248 const Instruction &User = cast<Instruction>(*I.use_back());
249 if (isInlineAsm(User) || isa<ExtractElementInst>(User) ||
250 isa<ShuffleVectorInst>(User))
254 // Only inline instruction it if it's use is in the same BB as the inst.
255 return I.getParent() == cast<Instruction>(I.use_back())->getParent();
258 // isDirectAlloca - Define fixed sized allocas in the entry block as direct
259 // variables which are accessed with the & operator. This causes GCC to
260 // generate significantly better code than to emit alloca calls directly.
262 static const AllocaInst *isDirectAlloca(const Value *V) {
263 const AllocaInst *AI = dyn_cast<AllocaInst>(V);
264 if (!AI) return false;
265 if (AI->isArrayAllocation())
266 return 0; // FIXME: we can also inline fixed size array allocas!
267 if (AI->getParent() != &AI->getParent()->getParent()->getEntryBlock())
272 // isInlineAsm - Check if the instruction is a call to an inline asm chunk
273 static bool isInlineAsm(const Instruction& I) {
274 if (isa<CallInst>(&I) && isa<InlineAsm>(I.getOperand(0)))
279 // Instruction visitation functions
280 friend class InstVisitor<CWriter>;
282 void visitReturnInst(ReturnInst &I);
283 void visitBranchInst(BranchInst &I);
284 void visitSwitchInst(SwitchInst &I);
285 void visitIndBrInst(IndBrInst &I);
286 void visitInvokeInst(InvokeInst &I) {
287 llvm_unreachable("Lowerinvoke pass didn't work!");
290 void visitUnwindInst(UnwindInst &I) {
291 llvm_unreachable("Lowerinvoke pass didn't work!");
293 void visitUnreachableInst(UnreachableInst &I);
295 void visitPHINode(PHINode &I);
296 void visitBinaryOperator(Instruction &I);
297 void visitICmpInst(ICmpInst &I);
298 void visitFCmpInst(FCmpInst &I);
300 void visitCastInst (CastInst &I);
301 void visitSelectInst(SelectInst &I);
302 void visitCallInst (CallInst &I);
303 void visitInlineAsm(CallInst &I);
304 bool visitBuiltinCall(CallInst &I, Intrinsic::ID ID, bool &WroteCallee);
306 void visitAllocaInst(AllocaInst &I);
307 void visitLoadInst (LoadInst &I);
308 void visitStoreInst (StoreInst &I);
309 void visitGetElementPtrInst(GetElementPtrInst &I);
310 void visitVAArgInst (VAArgInst &I);
312 void visitInsertElementInst(InsertElementInst &I);
313 void visitExtractElementInst(ExtractElementInst &I);
314 void visitShuffleVectorInst(ShuffleVectorInst &SVI);
316 void visitInsertValueInst(InsertValueInst &I);
317 void visitExtractValueInst(ExtractValueInst &I);
319 void visitInstruction(Instruction &I) {
321 errs() << "C Writer does not know about " << I;
326 void outputLValue(Instruction *I) {
327 Out << " " << GetValueName(I) << " = ";
330 bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To);
331 void printPHICopiesForSuccessor(BasicBlock *CurBlock,
332 BasicBlock *Successor, unsigned Indent);
333 void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
335 void printGEPExpression(Value *Ptr, gep_type_iterator I,
336 gep_type_iterator E, bool Static);
338 std::string GetValueName(const Value *Operand);
342 char CWriter::ID = 0;
344 /// This method inserts names for any unnamed structure types that are used by
345 /// the program, and removes names from structure types that are not used by the
348 bool CBackendNameAllUsedStructsAndMergeFunctions::runOnModule(Module &M) {
349 // Get a set of types that are used by the program...
350 std::set<const Type *> UT = getAnalysis<FindUsedTypes>().getTypes();
352 // Loop over the module symbol table, removing types from UT that are
353 // already named, and removing names for types that are not used.
355 TypeSymbolTable &TST = M.getTypeSymbolTable();
356 for (TypeSymbolTable::iterator TI = TST.begin(), TE = TST.end();
358 TypeSymbolTable::iterator I = TI++;
360 // If this isn't a struct or array type, remove it from our set of types
361 // to name. This simplifies emission later.
362 if (!isa<StructType>(I->second) && !isa<OpaqueType>(I->second) &&
363 !isa<ArrayType>(I->second)) {
366 // If this is not used, remove it from the symbol table.
367 std::set<const Type *>::iterator UTI = UT.find(I->second);
371 UT.erase(UTI); // Only keep one name for this type.
375 // UT now contains types that are not named. Loop over it, naming
378 bool Changed = false;
379 unsigned RenameCounter = 0;
380 for (std::set<const Type *>::const_iterator I = UT.begin(), E = UT.end();
382 if (isa<StructType>(*I) || isa<ArrayType>(*I)) {
383 while (M.addTypeName("unnamed"+utostr(RenameCounter), *I))
389 // Loop over all external functions and globals. If we have two with
390 // identical names, merge them.
391 // FIXME: This code should disappear when we don't allow values with the same
392 // names when they have different types!
393 std::map<std::string, GlobalValue*> ExtSymbols;
394 for (Module::iterator I = M.begin(), E = M.end(); I != E;) {
396 if (GV->isDeclaration() && GV->hasName()) {
397 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
398 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
400 // Found a conflict, replace this global with the previous one.
401 GlobalValue *OldGV = X.first->second;
402 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
403 GV->eraseFromParent();
408 // Do the same for globals.
409 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
411 GlobalVariable *GV = I++;
412 if (GV->isDeclaration() && GV->hasName()) {
413 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
414 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
416 // Found a conflict, replace this global with the previous one.
417 GlobalValue *OldGV = X.first->second;
418 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
419 GV->eraseFromParent();
428 /// printStructReturnPointerFunctionType - This is like printType for a struct
429 /// return type, except, instead of printing the type as void (*)(Struct*, ...)
430 /// print it as "Struct (*)(...)", for struct return functions.
431 void CWriter::printStructReturnPointerFunctionType(formatted_raw_ostream &Out,
432 const AttrListPtr &PAL,
433 const PointerType *TheTy) {
434 const FunctionType *FTy = cast<FunctionType>(TheTy->getElementType());
435 std::stringstream FunctionInnards;
436 FunctionInnards << " (*) (";
437 bool PrintedType = false;
439 FunctionType::param_iterator I = FTy->param_begin(), E = FTy->param_end();
440 const Type *RetTy = cast<PointerType>(I->get())->getElementType();
442 for (++I, ++Idx; I != E; ++I, ++Idx) {
444 FunctionInnards << ", ";
445 const Type *ArgTy = *I;
446 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
447 assert(isa<PointerType>(ArgTy));
448 ArgTy = cast<PointerType>(ArgTy)->getElementType();
450 printType(FunctionInnards, ArgTy,
451 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
454 if (FTy->isVarArg()) {
456 FunctionInnards << ", ...";
457 } else if (!PrintedType) {
458 FunctionInnards << "void";
460 FunctionInnards << ')';
461 std::string tstr = FunctionInnards.str();
462 printType(Out, RetTy,
463 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
467 CWriter::printSimpleType(formatted_raw_ostream &Out, const Type *Ty,
469 const std::string &NameSoFar) {
470 assert((Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) &&
471 "Invalid type for printSimpleType");
472 switch (Ty->getTypeID()) {
473 case Type::VoidTyID: return Out << "void " << NameSoFar;
474 case Type::IntegerTyID: {
475 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
477 return Out << "bool " << NameSoFar;
478 else if (NumBits <= 8)
479 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
480 else if (NumBits <= 16)
481 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
482 else if (NumBits <= 32)
483 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
484 else if (NumBits <= 64)
485 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
487 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
488 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
491 case Type::FloatTyID: return Out << "float " << NameSoFar;
492 case Type::DoubleTyID: return Out << "double " << NameSoFar;
493 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
494 // present matches host 'long double'.
495 case Type::X86_FP80TyID:
496 case Type::PPC_FP128TyID:
497 case Type::FP128TyID: return Out << "long double " << NameSoFar;
499 case Type::VectorTyID: {
500 const VectorType *VTy = cast<VectorType>(Ty);
501 return printSimpleType(Out, VTy->getElementType(), isSigned,
502 " __attribute__((vector_size(" +
503 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
508 errs() << "Unknown primitive type: " << *Ty << "\n";
515 CWriter::printSimpleType(std::ostream &Out, const Type *Ty, bool isSigned,
516 const std::string &NameSoFar) {
517 assert((Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) &&
518 "Invalid type for printSimpleType");
519 switch (Ty->getTypeID()) {
520 case Type::VoidTyID: return Out << "void " << NameSoFar;
521 case Type::IntegerTyID: {
522 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
524 return Out << "bool " << NameSoFar;
525 else if (NumBits <= 8)
526 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
527 else if (NumBits <= 16)
528 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
529 else if (NumBits <= 32)
530 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
531 else if (NumBits <= 64)
532 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
534 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
535 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
538 case Type::FloatTyID: return Out << "float " << NameSoFar;
539 case Type::DoubleTyID: return Out << "double " << NameSoFar;
540 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
541 // present matches host 'long double'.
542 case Type::X86_FP80TyID:
543 case Type::PPC_FP128TyID:
544 case Type::FP128TyID: return Out << "long double " << NameSoFar;
546 case Type::VectorTyID: {
547 const VectorType *VTy = cast<VectorType>(Ty);
548 return printSimpleType(Out, VTy->getElementType(), isSigned,
549 " __attribute__((vector_size(" +
550 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
555 errs() << "Unknown primitive type: " << *Ty << "\n";
561 // Pass the Type* and the variable name and this prints out the variable
564 raw_ostream &CWriter::printType(formatted_raw_ostream &Out,
566 bool isSigned, const std::string &NameSoFar,
567 bool IgnoreName, const AttrListPtr &PAL) {
568 if (Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) {
569 printSimpleType(Out, Ty, isSigned, NameSoFar);
573 // Check to see if the type is named.
574 if (!IgnoreName || isa<OpaqueType>(Ty)) {
575 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
576 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
579 switch (Ty->getTypeID()) {
580 case Type::FunctionTyID: {
581 const FunctionType *FTy = cast<FunctionType>(Ty);
582 std::stringstream FunctionInnards;
583 FunctionInnards << " (" << NameSoFar << ") (";
585 for (FunctionType::param_iterator I = FTy->param_begin(),
586 E = FTy->param_end(); I != E; ++I) {
587 const Type *ArgTy = *I;
588 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
589 assert(isa<PointerType>(ArgTy));
590 ArgTy = cast<PointerType>(ArgTy)->getElementType();
592 if (I != FTy->param_begin())
593 FunctionInnards << ", ";
594 printType(FunctionInnards, ArgTy,
595 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
598 if (FTy->isVarArg()) {
599 if (FTy->getNumParams())
600 FunctionInnards << ", ...";
601 } else if (!FTy->getNumParams()) {
602 FunctionInnards << "void";
604 FunctionInnards << ')';
605 std::string tstr = FunctionInnards.str();
606 printType(Out, FTy->getReturnType(),
607 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
610 case Type::StructTyID: {
611 const StructType *STy = cast<StructType>(Ty);
612 Out << NameSoFar + " {\n";
614 for (StructType::element_iterator I = STy->element_begin(),
615 E = STy->element_end(); I != E; ++I) {
617 printType(Out, *I, false, "field" + utostr(Idx++));
622 Out << " __attribute__ ((packed))";
626 case Type::PointerTyID: {
627 const PointerType *PTy = cast<PointerType>(Ty);
628 std::string ptrName = "*" + NameSoFar;
630 if (isa<ArrayType>(PTy->getElementType()) ||
631 isa<VectorType>(PTy->getElementType()))
632 ptrName = "(" + ptrName + ")";
635 // Must be a function ptr cast!
636 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
637 return printType(Out, PTy->getElementType(), false, ptrName);
640 case Type::ArrayTyID: {
641 const ArrayType *ATy = cast<ArrayType>(Ty);
642 unsigned NumElements = ATy->getNumElements();
643 if (NumElements == 0) NumElements = 1;
644 // Arrays are wrapped in structs to allow them to have normal
645 // value semantics (avoiding the array "decay").
646 Out << NameSoFar << " { ";
647 printType(Out, ATy->getElementType(), false,
648 "array[" + utostr(NumElements) + "]");
652 case Type::OpaqueTyID: {
653 std::string TyName = "struct opaque_" + itostr(OpaqueCounter++);
654 assert(TypeNames.find(Ty) == TypeNames.end());
655 TypeNames[Ty] = TyName;
656 return Out << TyName << ' ' << NameSoFar;
659 llvm_unreachable("Unhandled case in getTypeProps!");
665 // Pass the Type* and the variable name and this prints out the variable
668 std::ostream &CWriter::printType(std::ostream &Out, const Type *Ty,
669 bool isSigned, const std::string &NameSoFar,
670 bool IgnoreName, const AttrListPtr &PAL) {
671 if (Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) {
672 printSimpleType(Out, Ty, isSigned, NameSoFar);
676 // Check to see if the type is named.
677 if (!IgnoreName || isa<OpaqueType>(Ty)) {
678 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
679 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
682 switch (Ty->getTypeID()) {
683 case Type::FunctionTyID: {
684 const FunctionType *FTy = cast<FunctionType>(Ty);
685 std::stringstream FunctionInnards;
686 FunctionInnards << " (" << NameSoFar << ") (";
688 for (FunctionType::param_iterator I = FTy->param_begin(),
689 E = FTy->param_end(); I != E; ++I) {
690 const Type *ArgTy = *I;
691 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
692 assert(isa<PointerType>(ArgTy));
693 ArgTy = cast<PointerType>(ArgTy)->getElementType();
695 if (I != FTy->param_begin())
696 FunctionInnards << ", ";
697 printType(FunctionInnards, ArgTy,
698 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
701 if (FTy->isVarArg()) {
702 if (FTy->getNumParams())
703 FunctionInnards << ", ...";
704 } else if (!FTy->getNumParams()) {
705 FunctionInnards << "void";
707 FunctionInnards << ')';
708 std::string tstr = FunctionInnards.str();
709 printType(Out, FTy->getReturnType(),
710 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
713 case Type::StructTyID: {
714 const StructType *STy = cast<StructType>(Ty);
715 Out << NameSoFar + " {\n";
717 for (StructType::element_iterator I = STy->element_begin(),
718 E = STy->element_end(); I != E; ++I) {
720 printType(Out, *I, false, "field" + utostr(Idx++));
725 Out << " __attribute__ ((packed))";
729 case Type::PointerTyID: {
730 const PointerType *PTy = cast<PointerType>(Ty);
731 std::string ptrName = "*" + NameSoFar;
733 if (isa<ArrayType>(PTy->getElementType()) ||
734 isa<VectorType>(PTy->getElementType()))
735 ptrName = "(" + ptrName + ")";
738 // Must be a function ptr cast!
739 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
740 return printType(Out, PTy->getElementType(), false, ptrName);
743 case Type::ArrayTyID: {
744 const ArrayType *ATy = cast<ArrayType>(Ty);
745 unsigned NumElements = ATy->getNumElements();
746 if (NumElements == 0) NumElements = 1;
747 // Arrays are wrapped in structs to allow them to have normal
748 // value semantics (avoiding the array "decay").
749 Out << NameSoFar << " { ";
750 printType(Out, ATy->getElementType(), false,
751 "array[" + utostr(NumElements) + "]");
755 case Type::OpaqueTyID: {
756 std::string TyName = "struct opaque_" + itostr(OpaqueCounter++);
757 assert(TypeNames.find(Ty) == TypeNames.end());
758 TypeNames[Ty] = TyName;
759 return Out << TyName << ' ' << NameSoFar;
762 llvm_unreachable("Unhandled case in getTypeProps!");
768 void CWriter::printConstantArray(ConstantArray *CPA, bool Static) {
770 // As a special case, print the array as a string if it is an array of
771 // ubytes or an array of sbytes with positive values.
773 const Type *ETy = CPA->getType()->getElementType();
774 bool isString = (ETy == Type::getInt8Ty(CPA->getContext()) ||
775 ETy == Type::getInt8Ty(CPA->getContext()));
777 // Make sure the last character is a null char, as automatically added by C
778 if (isString && (CPA->getNumOperands() == 0 ||
779 !cast<Constant>(*(CPA->op_end()-1))->isNullValue()))
784 // Keep track of whether the last number was a hexadecimal escape
785 bool LastWasHex = false;
787 // Do not include the last character, which we know is null
788 for (unsigned i = 0, e = CPA->getNumOperands()-1; i != e; ++i) {
789 unsigned char C = cast<ConstantInt>(CPA->getOperand(i))->getZExtValue();
791 // Print it out literally if it is a printable character. The only thing
792 // to be careful about is when the last letter output was a hex escape
793 // code, in which case we have to be careful not to print out hex digits
794 // explicitly (the C compiler thinks it is a continuation of the previous
795 // character, sheesh...)
797 if (isprint(C) && (!LastWasHex || !isxdigit(C))) {
799 if (C == '"' || C == '\\')
800 Out << "\\" << (char)C;
806 case '\n': Out << "\\n"; break;
807 case '\t': Out << "\\t"; break;
808 case '\r': Out << "\\r"; break;
809 case '\v': Out << "\\v"; break;
810 case '\a': Out << "\\a"; break;
811 case '\"': Out << "\\\""; break;
812 case '\'': Out << "\\\'"; break;
815 Out << (char)(( C/16 < 10) ? ( C/16 +'0') : ( C/16 -10+'A'));
816 Out << (char)(((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A'));
825 if (CPA->getNumOperands()) {
827 printConstant(cast<Constant>(CPA->getOperand(0)), Static);
828 for (unsigned i = 1, e = CPA->getNumOperands(); i != e; ++i) {
830 printConstant(cast<Constant>(CPA->getOperand(i)), Static);
837 void CWriter::printConstantVector(ConstantVector *CP, bool Static) {
839 if (CP->getNumOperands()) {
841 printConstant(cast<Constant>(CP->getOperand(0)), Static);
842 for (unsigned i = 1, e = CP->getNumOperands(); i != e; ++i) {
844 printConstant(cast<Constant>(CP->getOperand(i)), Static);
850 // isFPCSafeToPrint - Returns true if we may assume that CFP may be written out
851 // textually as a double (rather than as a reference to a stack-allocated
852 // variable). We decide this by converting CFP to a string and back into a
853 // double, and then checking whether the conversion results in a bit-equal
854 // double to the original value of CFP. This depends on us and the target C
855 // compiler agreeing on the conversion process (which is pretty likely since we
856 // only deal in IEEE FP).
858 static bool isFPCSafeToPrint(const ConstantFP *CFP) {
860 // Do long doubles in hex for now.
861 if (CFP->getType() != Type::getFloatTy(CFP->getContext()) &&
862 CFP->getType() != Type::getDoubleTy(CFP->getContext()))
864 APFloat APF = APFloat(CFP->getValueAPF()); // copy
865 if (CFP->getType() == Type::getFloatTy(CFP->getContext()))
866 APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &ignored);
867 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
869 sprintf(Buffer, "%a", APF.convertToDouble());
870 if (!strncmp(Buffer, "0x", 2) ||
871 !strncmp(Buffer, "-0x", 3) ||
872 !strncmp(Buffer, "+0x", 3))
873 return APF.bitwiseIsEqual(APFloat(atof(Buffer)));
876 std::string StrVal = ftostr(APF);
878 while (StrVal[0] == ' ')
879 StrVal.erase(StrVal.begin());
881 // Check to make sure that the stringized number is not some string like "Inf"
882 // or NaN. Check that the string matches the "[-+]?[0-9]" regex.
883 if ((StrVal[0] >= '0' && StrVal[0] <= '9') ||
884 ((StrVal[0] == '-' || StrVal[0] == '+') &&
885 (StrVal[1] >= '0' && StrVal[1] <= '9')))
886 // Reparse stringized version!
887 return APF.bitwiseIsEqual(APFloat(atof(StrVal.c_str())));
892 /// Print out the casting for a cast operation. This does the double casting
893 /// necessary for conversion to the destination type, if necessary.
894 /// @brief Print a cast
895 void CWriter::printCast(unsigned opc, const Type *SrcTy, const Type *DstTy) {
896 // Print the destination type cast
898 case Instruction::UIToFP:
899 case Instruction::SIToFP:
900 case Instruction::IntToPtr:
901 case Instruction::Trunc:
902 case Instruction::BitCast:
903 case Instruction::FPExt:
904 case Instruction::FPTrunc: // For these the DstTy sign doesn't matter
906 printType(Out, DstTy);
909 case Instruction::ZExt:
910 case Instruction::PtrToInt:
911 case Instruction::FPToUI: // For these, make sure we get an unsigned dest
913 printSimpleType(Out, DstTy, false);
916 case Instruction::SExt:
917 case Instruction::FPToSI: // For these, make sure we get a signed dest
919 printSimpleType(Out, DstTy, true);
923 llvm_unreachable("Invalid cast opcode");
926 // Print the source type cast
928 case Instruction::UIToFP:
929 case Instruction::ZExt:
931 printSimpleType(Out, SrcTy, false);
934 case Instruction::SIToFP:
935 case Instruction::SExt:
937 printSimpleType(Out, SrcTy, true);
940 case Instruction::IntToPtr:
941 case Instruction::PtrToInt:
942 // Avoid "cast to pointer from integer of different size" warnings
943 Out << "(unsigned long)";
945 case Instruction::Trunc:
946 case Instruction::BitCast:
947 case Instruction::FPExt:
948 case Instruction::FPTrunc:
949 case Instruction::FPToSI:
950 case Instruction::FPToUI:
951 break; // These don't need a source cast.
953 llvm_unreachable("Invalid cast opcode");
958 // printConstant - The LLVM Constant to C Constant converter.
959 void CWriter::printConstant(Constant *CPV, bool Static) {
960 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
961 switch (CE->getOpcode()) {
962 case Instruction::Trunc:
963 case Instruction::ZExt:
964 case Instruction::SExt:
965 case Instruction::FPTrunc:
966 case Instruction::FPExt:
967 case Instruction::UIToFP:
968 case Instruction::SIToFP:
969 case Instruction::FPToUI:
970 case Instruction::FPToSI:
971 case Instruction::PtrToInt:
972 case Instruction::IntToPtr:
973 case Instruction::BitCast:
975 printCast(CE->getOpcode(), CE->getOperand(0)->getType(), CE->getType());
976 if (CE->getOpcode() == Instruction::SExt &&
977 CE->getOperand(0)->getType() == Type::getInt1Ty(CPV->getContext())) {
978 // Make sure we really sext from bool here by subtracting from 0
981 printConstant(CE->getOperand(0), Static);
982 if (CE->getType() == Type::getInt1Ty(CPV->getContext()) &&
983 (CE->getOpcode() == Instruction::Trunc ||
984 CE->getOpcode() == Instruction::FPToUI ||
985 CE->getOpcode() == Instruction::FPToSI ||
986 CE->getOpcode() == Instruction::PtrToInt)) {
987 // Make sure we really truncate to bool here by anding with 1
993 case Instruction::GetElementPtr:
995 printGEPExpression(CE->getOperand(0), gep_type_begin(CPV),
996 gep_type_end(CPV), Static);
999 case Instruction::Select:
1001 printConstant(CE->getOperand(0), Static);
1003 printConstant(CE->getOperand(1), Static);
1005 printConstant(CE->getOperand(2), Static);
1008 case Instruction::Add:
1009 case Instruction::FAdd:
1010 case Instruction::Sub:
1011 case Instruction::FSub:
1012 case Instruction::Mul:
1013 case Instruction::FMul:
1014 case Instruction::SDiv:
1015 case Instruction::UDiv:
1016 case Instruction::FDiv:
1017 case Instruction::URem:
1018 case Instruction::SRem:
1019 case Instruction::FRem:
1020 case Instruction::And:
1021 case Instruction::Or:
1022 case Instruction::Xor:
1023 case Instruction::ICmp:
1024 case Instruction::Shl:
1025 case Instruction::LShr:
1026 case Instruction::AShr:
1029 bool NeedsClosingParens = printConstExprCast(CE, Static);
1030 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
1031 switch (CE->getOpcode()) {
1032 case Instruction::Add:
1033 case Instruction::FAdd: Out << " + "; break;
1034 case Instruction::Sub:
1035 case Instruction::FSub: Out << " - "; break;
1036 case Instruction::Mul:
1037 case Instruction::FMul: Out << " * "; break;
1038 case Instruction::URem:
1039 case Instruction::SRem:
1040 case Instruction::FRem: Out << " % "; break;
1041 case Instruction::UDiv:
1042 case Instruction::SDiv:
1043 case Instruction::FDiv: Out << " / "; break;
1044 case Instruction::And: Out << " & "; break;
1045 case Instruction::Or: Out << " | "; break;
1046 case Instruction::Xor: Out << " ^ "; break;
1047 case Instruction::Shl: Out << " << "; break;
1048 case Instruction::LShr:
1049 case Instruction::AShr: Out << " >> "; break;
1050 case Instruction::ICmp:
1051 switch (CE->getPredicate()) {
1052 case ICmpInst::ICMP_EQ: Out << " == "; break;
1053 case ICmpInst::ICMP_NE: Out << " != "; break;
1054 case ICmpInst::ICMP_SLT:
1055 case ICmpInst::ICMP_ULT: Out << " < "; break;
1056 case ICmpInst::ICMP_SLE:
1057 case ICmpInst::ICMP_ULE: Out << " <= "; break;
1058 case ICmpInst::ICMP_SGT:
1059 case ICmpInst::ICMP_UGT: Out << " > "; break;
1060 case ICmpInst::ICMP_SGE:
1061 case ICmpInst::ICMP_UGE: Out << " >= "; break;
1062 default: llvm_unreachable("Illegal ICmp predicate");
1065 default: llvm_unreachable("Illegal opcode here!");
1067 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
1068 if (NeedsClosingParens)
1073 case Instruction::FCmp: {
1075 bool NeedsClosingParens = printConstExprCast(CE, Static);
1076 if (CE->getPredicate() == FCmpInst::FCMP_FALSE)
1078 else if (CE->getPredicate() == FCmpInst::FCMP_TRUE)
1082 switch (CE->getPredicate()) {
1083 default: llvm_unreachable("Illegal FCmp predicate");
1084 case FCmpInst::FCMP_ORD: op = "ord"; break;
1085 case FCmpInst::FCMP_UNO: op = "uno"; break;
1086 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
1087 case FCmpInst::FCMP_UNE: op = "une"; break;
1088 case FCmpInst::FCMP_ULT: op = "ult"; break;
1089 case FCmpInst::FCMP_ULE: op = "ule"; break;
1090 case FCmpInst::FCMP_UGT: op = "ugt"; break;
1091 case FCmpInst::FCMP_UGE: op = "uge"; break;
1092 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
1093 case FCmpInst::FCMP_ONE: op = "one"; break;
1094 case FCmpInst::FCMP_OLT: op = "olt"; break;
1095 case FCmpInst::FCMP_OLE: op = "ole"; break;
1096 case FCmpInst::FCMP_OGT: op = "ogt"; break;
1097 case FCmpInst::FCMP_OGE: op = "oge"; break;
1099 Out << "llvm_fcmp_" << op << "(";
1100 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
1102 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
1105 if (NeedsClosingParens)
1112 errs() << "CWriter Error: Unhandled constant expression: "
1115 llvm_unreachable(0);
1117 } else if (isa<UndefValue>(CPV) && CPV->getType()->isSingleValueType()) {
1119 printType(Out, CPV->getType()); // sign doesn't matter
1120 Out << ")/*UNDEF*/";
1121 if (!isa<VectorType>(CPV->getType())) {
1129 if (ConstantInt *CI = dyn_cast<ConstantInt>(CPV)) {
1130 const Type* Ty = CI->getType();
1131 if (Ty == Type::getInt1Ty(CPV->getContext()))
1132 Out << (CI->getZExtValue() ? '1' : '0');
1133 else if (Ty == Type::getInt32Ty(CPV->getContext()))
1134 Out << CI->getZExtValue() << 'u';
1135 else if (Ty->getPrimitiveSizeInBits() > 32)
1136 Out << CI->getZExtValue() << "ull";
1139 printSimpleType(Out, Ty, false) << ')';
1140 if (CI->isMinValue(true))
1141 Out << CI->getZExtValue() << 'u';
1143 Out << CI->getSExtValue();
1149 switch (CPV->getType()->getTypeID()) {
1150 case Type::FloatTyID:
1151 case Type::DoubleTyID:
1152 case Type::X86_FP80TyID:
1153 case Type::PPC_FP128TyID:
1154 case Type::FP128TyID: {
1155 ConstantFP *FPC = cast<ConstantFP>(CPV);
1156 std::map<const ConstantFP*, unsigned>::iterator I = FPConstantMap.find(FPC);
1157 if (I != FPConstantMap.end()) {
1158 // Because of FP precision problems we must load from a stack allocated
1159 // value that holds the value in hex.
1160 Out << "(*(" << (FPC->getType() == Type::getFloatTy(CPV->getContext()) ?
1162 FPC->getType() == Type::getDoubleTy(CPV->getContext()) ?
1165 << "*)&FPConstant" << I->second << ')';
1168 if (FPC->getType() == Type::getFloatTy(CPV->getContext()))
1169 V = FPC->getValueAPF().convertToFloat();
1170 else if (FPC->getType() == Type::getDoubleTy(CPV->getContext()))
1171 V = FPC->getValueAPF().convertToDouble();
1173 // Long double. Convert the number to double, discarding precision.
1174 // This is not awesome, but it at least makes the CBE output somewhat
1176 APFloat Tmp = FPC->getValueAPF();
1178 Tmp.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &LosesInfo);
1179 V = Tmp.convertToDouble();
1185 // FIXME the actual NaN bits should be emitted.
1186 // The prefix for a quiet NaN is 0x7FF8. For a signalling NaN,
1188 const unsigned long QuietNaN = 0x7ff8UL;
1189 //const unsigned long SignalNaN = 0x7ff4UL;
1191 // We need to grab the first part of the FP #
1194 uint64_t ll = DoubleToBits(V);
1195 sprintf(Buffer, "0x%llx", static_cast<long long>(ll));
1197 std::string Num(&Buffer[0], &Buffer[6]);
1198 unsigned long Val = strtoul(Num.c_str(), 0, 16);
1200 if (FPC->getType() == Type::getFloatTy(FPC->getContext()))
1201 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "F(\""
1202 << Buffer << "\") /*nan*/ ";
1204 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "(\""
1205 << Buffer << "\") /*nan*/ ";
1206 } else if (IsInf(V)) {
1208 if (V < 0) Out << '-';
1209 Out << "LLVM_INF" <<
1210 (FPC->getType() == Type::getFloatTy(FPC->getContext()) ? "F" : "")
1214 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
1215 // Print out the constant as a floating point number.
1217 sprintf(Buffer, "%a", V);
1220 Num = ftostr(FPC->getValueAPF());
1228 case Type::ArrayTyID:
1229 // Use C99 compound expression literal initializer syntax.
1232 printType(Out, CPV->getType());
1235 Out << "{ "; // Arrays are wrapped in struct types.
1236 if (ConstantArray *CA = dyn_cast<ConstantArray>(CPV)) {
1237 printConstantArray(CA, Static);
1239 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1240 const ArrayType *AT = cast<ArrayType>(CPV->getType());
1242 if (AT->getNumElements()) {
1244 Constant *CZ = Constant::getNullValue(AT->getElementType());
1245 printConstant(CZ, Static);
1246 for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
1248 printConstant(CZ, Static);
1253 Out << " }"; // Arrays are wrapped in struct types.
1256 case Type::VectorTyID:
1257 // Use C99 compound expression literal initializer syntax.
1260 printType(Out, CPV->getType());
1263 if (ConstantVector *CV = dyn_cast<ConstantVector>(CPV)) {
1264 printConstantVector(CV, Static);
1266 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1267 const VectorType *VT = cast<VectorType>(CPV->getType());
1269 Constant *CZ = Constant::getNullValue(VT->getElementType());
1270 printConstant(CZ, Static);
1271 for (unsigned i = 1, e = VT->getNumElements(); i != e; ++i) {
1273 printConstant(CZ, Static);
1279 case Type::StructTyID:
1280 // Use C99 compound expression literal initializer syntax.
1283 printType(Out, CPV->getType());
1286 if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
1287 const StructType *ST = cast<StructType>(CPV->getType());
1289 if (ST->getNumElements()) {
1291 printConstant(Constant::getNullValue(ST->getElementType(0)), Static);
1292 for (unsigned i = 1, e = ST->getNumElements(); i != e; ++i) {
1294 printConstant(Constant::getNullValue(ST->getElementType(i)), Static);
1300 if (CPV->getNumOperands()) {
1302 printConstant(cast<Constant>(CPV->getOperand(0)), Static);
1303 for (unsigned i = 1, e = CPV->getNumOperands(); i != e; ++i) {
1305 printConstant(cast<Constant>(CPV->getOperand(i)), Static);
1312 case Type::PointerTyID:
1313 if (isa<ConstantPointerNull>(CPV)) {
1315 printType(Out, CPV->getType()); // sign doesn't matter
1316 Out << ")/*NULL*/0)";
1318 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(CPV)) {
1319 writeOperand(GV, Static);
1325 errs() << "Unknown constant type: " << *CPV << "\n";
1327 llvm_unreachable(0);
1331 // Some constant expressions need to be casted back to the original types
1332 // because their operands were casted to the expected type. This function takes
1333 // care of detecting that case and printing the cast for the ConstantExpr.
1334 bool CWriter::printConstExprCast(const ConstantExpr* CE, bool Static) {
1335 bool NeedsExplicitCast = false;
1336 const Type *Ty = CE->getOperand(0)->getType();
1337 bool TypeIsSigned = false;
1338 switch (CE->getOpcode()) {
1339 case Instruction::Add:
1340 case Instruction::Sub:
1341 case Instruction::Mul:
1342 // We need to cast integer arithmetic so that it is always performed
1343 // as unsigned, to avoid undefined behavior on overflow.
1344 case Instruction::LShr:
1345 case Instruction::URem:
1346 case Instruction::UDiv: NeedsExplicitCast = true; break;
1347 case Instruction::AShr:
1348 case Instruction::SRem:
1349 case Instruction::SDiv: NeedsExplicitCast = true; TypeIsSigned = true; break;
1350 case Instruction::SExt:
1352 NeedsExplicitCast = true;
1353 TypeIsSigned = true;
1355 case Instruction::ZExt:
1356 case Instruction::Trunc:
1357 case Instruction::FPTrunc:
1358 case Instruction::FPExt:
1359 case Instruction::UIToFP:
1360 case Instruction::SIToFP:
1361 case Instruction::FPToUI:
1362 case Instruction::FPToSI:
1363 case Instruction::PtrToInt:
1364 case Instruction::IntToPtr:
1365 case Instruction::BitCast:
1367 NeedsExplicitCast = true;
1371 if (NeedsExplicitCast) {
1373 if (Ty->isInteger() && Ty != Type::getInt1Ty(Ty->getContext()))
1374 printSimpleType(Out, Ty, TypeIsSigned);
1376 printType(Out, Ty); // not integer, sign doesn't matter
1379 return NeedsExplicitCast;
1382 // Print a constant assuming that it is the operand for a given Opcode. The
1383 // opcodes that care about sign need to cast their operands to the expected
1384 // type before the operation proceeds. This function does the casting.
1385 void CWriter::printConstantWithCast(Constant* CPV, unsigned Opcode) {
1387 // Extract the operand's type, we'll need it.
1388 const Type* OpTy = CPV->getType();
1390 // Indicate whether to do the cast or not.
1391 bool shouldCast = false;
1392 bool typeIsSigned = false;
1394 // Based on the Opcode for which this Constant is being written, determine
1395 // the new type to which the operand should be casted by setting the value
1396 // of OpTy. If we change OpTy, also set shouldCast to true so it gets
1400 // for most instructions, it doesn't matter
1402 case Instruction::Add:
1403 case Instruction::Sub:
1404 case Instruction::Mul:
1405 // We need to cast integer arithmetic so that it is always performed
1406 // as unsigned, to avoid undefined behavior on overflow.
1407 case Instruction::LShr:
1408 case Instruction::UDiv:
1409 case Instruction::URem:
1412 case Instruction::AShr:
1413 case Instruction::SDiv:
1414 case Instruction::SRem:
1416 typeIsSigned = true;
1420 // Write out the casted constant if we should, otherwise just write the
1424 printSimpleType(Out, OpTy, typeIsSigned);
1426 printConstant(CPV, false);
1429 printConstant(CPV, false);
1432 std::string CWriter::GetValueName(const Value *Operand) {
1433 // Mangle globals with the standard mangler interface for LLC compatibility.
1434 if (const GlobalValue *GV = dyn_cast<GlobalValue>(Operand))
1435 return Mang->getMangledName(GV);
1437 std::string Name = Operand->getName();
1439 if (Name.empty()) { // Assign unique names to local temporaries.
1440 unsigned &No = AnonValueNumbers[Operand];
1442 No = ++NextAnonValueNumber;
1443 Name = "tmp__" + utostr(No);
1446 std::string VarName;
1447 VarName.reserve(Name.capacity());
1449 for (std::string::iterator I = Name.begin(), E = Name.end();
1453 if (!((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
1454 (ch >= '0' && ch <= '9') || ch == '_')) {
1456 sprintf(buffer, "_%x_", ch);
1462 return "llvm_cbe_" + VarName;
1465 /// writeInstComputationInline - Emit the computation for the specified
1466 /// instruction inline, with no destination provided.
1467 void CWriter::writeInstComputationInline(Instruction &I) {
1468 // We can't currently support integer types other than 1, 8, 16, 32, 64.
1470 const Type *Ty = I.getType();
1471 if (Ty->isInteger() && (Ty!=Type::getInt1Ty(I.getContext()) &&
1472 Ty!=Type::getInt8Ty(I.getContext()) &&
1473 Ty!=Type::getInt16Ty(I.getContext()) &&
1474 Ty!=Type::getInt32Ty(I.getContext()) &&
1475 Ty!=Type::getInt64Ty(I.getContext()))) {
1476 llvm_report_error("The C backend does not currently support integer "
1477 "types of widths other than 1, 8, 16, 32, 64.\n"
1478 "This is being tracked as PR 4158.");
1481 // If this is a non-trivial bool computation, make sure to truncate down to
1482 // a 1 bit value. This is important because we want "add i1 x, y" to return
1483 // "0" when x and y are true, not "2" for example.
1484 bool NeedBoolTrunc = false;
1485 if (I.getType() == Type::getInt1Ty(I.getContext()) &&
1486 !isa<ICmpInst>(I) && !isa<FCmpInst>(I))
1487 NeedBoolTrunc = true;
1499 void CWriter::writeOperandInternal(Value *Operand, bool Static) {
1500 if (Instruction *I = dyn_cast<Instruction>(Operand))
1501 // Should we inline this instruction to build a tree?
1502 if (isInlinableInst(*I) && !isDirectAlloca(I)) {
1504 writeInstComputationInline(*I);
1509 Constant* CPV = dyn_cast<Constant>(Operand);
1511 if (CPV && !isa<GlobalValue>(CPV))
1512 printConstant(CPV, Static);
1514 Out << GetValueName(Operand);
1517 void CWriter::writeOperand(Value *Operand, bool Static) {
1518 bool isAddressImplicit = isAddressExposed(Operand);
1519 if (isAddressImplicit)
1520 Out << "(&"; // Global variables are referenced as their addresses by llvm
1522 writeOperandInternal(Operand, Static);
1524 if (isAddressImplicit)
1528 // Some instructions need to have their result value casted back to the
1529 // original types because their operands were casted to the expected type.
1530 // This function takes care of detecting that case and printing the cast
1531 // for the Instruction.
1532 bool CWriter::writeInstructionCast(const Instruction &I) {
1533 const Type *Ty = I.getOperand(0)->getType();
1534 switch (I.getOpcode()) {
1535 case Instruction::Add:
1536 case Instruction::Sub:
1537 case Instruction::Mul:
1538 // We need to cast integer arithmetic so that it is always performed
1539 // as unsigned, to avoid undefined behavior on overflow.
1540 case Instruction::LShr:
1541 case Instruction::URem:
1542 case Instruction::UDiv:
1544 printSimpleType(Out, Ty, false);
1547 case Instruction::AShr:
1548 case Instruction::SRem:
1549 case Instruction::SDiv:
1551 printSimpleType(Out, Ty, true);
1559 // Write the operand with a cast to another type based on the Opcode being used.
1560 // This will be used in cases where an instruction has specific type
1561 // requirements (usually signedness) for its operands.
1562 void CWriter::writeOperandWithCast(Value* Operand, unsigned Opcode) {
1564 // Extract the operand's type, we'll need it.
1565 const Type* OpTy = Operand->getType();
1567 // Indicate whether to do the cast or not.
1568 bool shouldCast = false;
1570 // Indicate whether the cast should be to a signed type or not.
1571 bool castIsSigned = false;
1573 // Based on the Opcode for which this Operand is being written, determine
1574 // the new type to which the operand should be casted by setting the value
1575 // of OpTy. If we change OpTy, also set shouldCast to true.
1578 // for most instructions, it doesn't matter
1580 case Instruction::Add:
1581 case Instruction::Sub:
1582 case Instruction::Mul:
1583 // We need to cast integer arithmetic so that it is always performed
1584 // as unsigned, to avoid undefined behavior on overflow.
1585 case Instruction::LShr:
1586 case Instruction::UDiv:
1587 case Instruction::URem: // Cast to unsigned first
1589 castIsSigned = false;
1591 case Instruction::GetElementPtr:
1592 case Instruction::AShr:
1593 case Instruction::SDiv:
1594 case Instruction::SRem: // Cast to signed first
1596 castIsSigned = true;
1600 // Write out the casted operand if we should, otherwise just write the
1604 printSimpleType(Out, OpTy, castIsSigned);
1606 writeOperand(Operand);
1609 writeOperand(Operand);
1612 // Write the operand with a cast to another type based on the icmp predicate
1614 void CWriter::writeOperandWithCast(Value* Operand, const ICmpInst &Cmp) {
1615 // This has to do a cast to ensure the operand has the right signedness.
1616 // Also, if the operand is a pointer, we make sure to cast to an integer when
1617 // doing the comparison both for signedness and so that the C compiler doesn't
1618 // optimize things like "p < NULL" to false (p may contain an integer value
1620 bool shouldCast = Cmp.isRelational();
1622 // Write out the casted operand if we should, otherwise just write the
1625 writeOperand(Operand);
1629 // Should this be a signed comparison? If so, convert to signed.
1630 bool castIsSigned = Cmp.isSigned();
1632 // If the operand was a pointer, convert to a large integer type.
1633 const Type* OpTy = Operand->getType();
1634 if (isa<PointerType>(OpTy))
1635 OpTy = TD->getIntPtrType(Operand->getContext());
1638 printSimpleType(Out, OpTy, castIsSigned);
1640 writeOperand(Operand);
1644 // generateCompilerSpecificCode - This is where we add conditional compilation
1645 // directives to cater to specific compilers as need be.
1647 static void generateCompilerSpecificCode(formatted_raw_ostream& Out,
1648 const TargetData *TD) {
1649 // Alloca is hard to get, and we don't want to include stdlib.h here.
1650 Out << "/* get a declaration for alloca */\n"
1651 << "#if defined(__CYGWIN__) || defined(__MINGW32__)\n"
1652 << "#define alloca(x) __builtin_alloca((x))\n"
1653 << "#define _alloca(x) __builtin_alloca((x))\n"
1654 << "#elif defined(__APPLE__)\n"
1655 << "extern void *__builtin_alloca(unsigned long);\n"
1656 << "#define alloca(x) __builtin_alloca(x)\n"
1657 << "#define longjmp _longjmp\n"
1658 << "#define setjmp _setjmp\n"
1659 << "#elif defined(__sun__)\n"
1660 << "#if defined(__sparcv9)\n"
1661 << "extern void *__builtin_alloca(unsigned long);\n"
1663 << "extern void *__builtin_alloca(unsigned int);\n"
1665 << "#define alloca(x) __builtin_alloca(x)\n"
1666 << "#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__arm__)\n"
1667 << "#define alloca(x) __builtin_alloca(x)\n"
1668 << "#elif defined(_MSC_VER)\n"
1669 << "#define inline _inline\n"
1670 << "#define alloca(x) _alloca(x)\n"
1672 << "#include <alloca.h>\n"
1675 // We output GCC specific attributes to preserve 'linkonce'ness on globals.
1676 // If we aren't being compiled with GCC, just drop these attributes.
1677 Out << "#ifndef __GNUC__ /* Can only support \"linkonce\" vars with GCC */\n"
1678 << "#define __attribute__(X)\n"
1681 // On Mac OS X, "external weak" is spelled "__attribute__((weak_import))".
1682 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1683 << "#define __EXTERNAL_WEAK__ __attribute__((weak_import))\n"
1684 << "#elif defined(__GNUC__)\n"
1685 << "#define __EXTERNAL_WEAK__ __attribute__((weak))\n"
1687 << "#define __EXTERNAL_WEAK__\n"
1690 // For now, turn off the weak linkage attribute on Mac OS X. (See above.)
1691 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1692 << "#define __ATTRIBUTE_WEAK__\n"
1693 << "#elif defined(__GNUC__)\n"
1694 << "#define __ATTRIBUTE_WEAK__ __attribute__((weak))\n"
1696 << "#define __ATTRIBUTE_WEAK__\n"
1699 // Add hidden visibility support. FIXME: APPLE_CC?
1700 Out << "#if defined(__GNUC__)\n"
1701 << "#define __HIDDEN__ __attribute__((visibility(\"hidden\")))\n"
1704 // Define NaN and Inf as GCC builtins if using GCC, as 0 otherwise
1705 // From the GCC documentation:
1707 // double __builtin_nan (const char *str)
1709 // This is an implementation of the ISO C99 function nan.
1711 // Since ISO C99 defines this function in terms of strtod, which we do
1712 // not implement, a description of the parsing is in order. The string is
1713 // parsed as by strtol; that is, the base is recognized by leading 0 or
1714 // 0x prefixes. The number parsed is placed in the significand such that
1715 // the least significant bit of the number is at the least significant
1716 // bit of the significand. The number is truncated to fit the significand
1717 // field provided. The significand is forced to be a quiet NaN.
1719 // This function, if given a string literal, is evaluated early enough
1720 // that it is considered a compile-time constant.
1722 // float __builtin_nanf (const char *str)
1724 // Similar to __builtin_nan, except the return type is float.
1726 // double __builtin_inf (void)
1728 // Similar to __builtin_huge_val, except a warning is generated if the
1729 // target floating-point format does not support infinities. This
1730 // function is suitable for implementing the ISO C99 macro INFINITY.
1732 // float __builtin_inff (void)
1734 // Similar to __builtin_inf, except the return type is float.
1735 Out << "#ifdef __GNUC__\n"
1736 << "#define LLVM_NAN(NanStr) __builtin_nan(NanStr) /* Double */\n"
1737 << "#define LLVM_NANF(NanStr) __builtin_nanf(NanStr) /* Float */\n"
1738 << "#define LLVM_NANS(NanStr) __builtin_nans(NanStr) /* Double */\n"
1739 << "#define LLVM_NANSF(NanStr) __builtin_nansf(NanStr) /* Float */\n"
1740 << "#define LLVM_INF __builtin_inf() /* Double */\n"
1741 << "#define LLVM_INFF __builtin_inff() /* Float */\n"
1742 << "#define LLVM_PREFETCH(addr,rw,locality) "
1743 "__builtin_prefetch(addr,rw,locality)\n"
1744 << "#define __ATTRIBUTE_CTOR__ __attribute__((constructor))\n"
1745 << "#define __ATTRIBUTE_DTOR__ __attribute__((destructor))\n"
1746 << "#define LLVM_ASM __asm__\n"
1748 << "#define LLVM_NAN(NanStr) ((double)0.0) /* Double */\n"
1749 << "#define LLVM_NANF(NanStr) 0.0F /* Float */\n"
1750 << "#define LLVM_NANS(NanStr) ((double)0.0) /* Double */\n"
1751 << "#define LLVM_NANSF(NanStr) 0.0F /* Float */\n"
1752 << "#define LLVM_INF ((double)0.0) /* Double */\n"
1753 << "#define LLVM_INFF 0.0F /* Float */\n"
1754 << "#define LLVM_PREFETCH(addr,rw,locality) /* PREFETCH */\n"
1755 << "#define __ATTRIBUTE_CTOR__\n"
1756 << "#define __ATTRIBUTE_DTOR__\n"
1757 << "#define LLVM_ASM(X)\n"
1760 Out << "#if __GNUC__ < 4 /* Old GCC's, or compilers not GCC */ \n"
1761 << "#define __builtin_stack_save() 0 /* not implemented */\n"
1762 << "#define __builtin_stack_restore(X) /* noop */\n"
1765 // Output typedefs for 128-bit integers. If these are needed with a
1766 // 32-bit target or with a C compiler that doesn't support mode(TI),
1767 // more drastic measures will be needed.
1768 Out << "#if __GNUC__ && __LP64__ /* 128-bit integer types */\n"
1769 << "typedef int __attribute__((mode(TI))) llvmInt128;\n"
1770 << "typedef unsigned __attribute__((mode(TI))) llvmUInt128;\n"
1773 // Output target-specific code that should be inserted into main.
1774 Out << "#define CODE_FOR_MAIN() /* Any target-specific code for main()*/\n";
1777 /// FindStaticTors - Given a static ctor/dtor list, unpack its contents into
1778 /// the StaticTors set.
1779 static void FindStaticTors(GlobalVariable *GV, std::set<Function*> &StaticTors){
1780 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
1781 if (!InitList) return;
1783 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
1784 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
1785 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
1787 if (CS->getOperand(1)->isNullValue())
1788 return; // Found a null terminator, exit printing.
1789 Constant *FP = CS->getOperand(1);
1790 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
1792 FP = CE->getOperand(0);
1793 if (Function *F = dyn_cast<Function>(FP))
1794 StaticTors.insert(F);
1798 enum SpecialGlobalClass {
1800 GlobalCtors, GlobalDtors,
1804 /// getGlobalVariableClass - If this is a global that is specially recognized
1805 /// by LLVM, return a code that indicates how we should handle it.
1806 static SpecialGlobalClass getGlobalVariableClass(const GlobalVariable *GV) {
1807 // If this is a global ctors/dtors list, handle it now.
1808 if (GV->hasAppendingLinkage() && GV->use_empty()) {
1809 if (GV->getName() == "llvm.global_ctors")
1811 else if (GV->getName() == "llvm.global_dtors")
1815 // Otherwise, it it is other metadata, don't print it. This catches things
1816 // like debug information.
1817 if (GV->getSection() == "llvm.metadata")
1823 // PrintEscapedString - Print each character of the specified string, escaping
1824 // it if it is not printable or if it is an escape char.
1825 static void PrintEscapedString(const char *Str, unsigned Length,
1827 for (unsigned i = 0; i != Length; ++i) {
1828 unsigned char C = Str[i];
1829 if (isprint(C) && C != '\\' && C != '"')
1838 Out << "\\x" << hexdigit(C >> 4) << hexdigit(C & 0x0F);
1842 // PrintEscapedString - Print each character of the specified string, escaping
1843 // it if it is not printable or if it is an escape char.
1844 static void PrintEscapedString(const std::string &Str, raw_ostream &Out) {
1845 PrintEscapedString(Str.c_str(), Str.size(), Out);
1848 bool CWriter::doInitialization(Module &M) {
1849 FunctionPass::doInitialization(M);
1854 TD = new TargetData(&M);
1855 IL = new IntrinsicLowering(*TD);
1856 IL->AddPrototypes(M);
1858 // Ensure that all structure types have names...
1859 Mang = new Mangler(M);
1860 Mang->markCharUnacceptable('.');
1862 // Keep track of which functions are static ctors/dtors so they can have
1863 // an attribute added to their prototypes.
1864 std::set<Function*> StaticCtors, StaticDtors;
1865 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1867 switch (getGlobalVariableClass(I)) {
1870 FindStaticTors(I, StaticCtors);
1873 FindStaticTors(I, StaticDtors);
1878 // get declaration for alloca
1879 Out << "/* Provide Declarations */\n";
1880 Out << "#include <stdarg.h>\n"; // Varargs support
1881 Out << "#include <setjmp.h>\n"; // Unwind support
1882 generateCompilerSpecificCode(Out, TD);
1884 // Provide a definition for `bool' if not compiling with a C++ compiler.
1886 << "#ifndef __cplusplus\ntypedef unsigned char bool;\n#endif\n"
1888 << "\n\n/* Support for floating point constants */\n"
1889 << "typedef unsigned long long ConstantDoubleTy;\n"
1890 << "typedef unsigned int ConstantFloatTy;\n"
1891 << "typedef struct { unsigned long long f1; unsigned short f2; "
1892 "unsigned short pad[3]; } ConstantFP80Ty;\n"
1893 // This is used for both kinds of 128-bit long double; meaning differs.
1894 << "typedef struct { unsigned long long f1; unsigned long long f2; }"
1895 " ConstantFP128Ty;\n"
1896 << "\n\n/* Global Declarations */\n";
1898 // First output all the declarations for the program, because C requires
1899 // Functions & globals to be declared before they are used.
1901 if (!M.getModuleInlineAsm().empty()) {
1902 Out << "/* Module asm statements */\n"
1905 // Split the string into lines, to make it easier to read the .ll file.
1906 std::string Asm = M.getModuleInlineAsm();
1908 size_t NewLine = Asm.find_first_of('\n', CurPos);
1909 while (NewLine != std::string::npos) {
1910 // We found a newline, print the portion of the asm string from the
1911 // last newline up to this newline.
1913 PrintEscapedString(std::string(Asm.begin()+CurPos, Asm.begin()+NewLine),
1917 NewLine = Asm.find_first_of('\n', CurPos);
1920 PrintEscapedString(std::string(Asm.begin()+CurPos, Asm.end()), Out);
1922 << "/* End Module asm statements */\n";
1925 // Loop over the symbol table, emitting all named constants...
1926 printModuleTypes(M.getTypeSymbolTable());
1928 // Global variable declarations...
1929 if (!M.global_empty()) {
1930 Out << "\n/* External Global Variable Declarations */\n";
1931 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1934 if (I->hasExternalLinkage() || I->hasExternalWeakLinkage() ||
1935 I->hasCommonLinkage())
1937 else if (I->hasDLLImportLinkage())
1938 Out << "__declspec(dllimport) ";
1940 continue; // Internal Global
1942 // Thread Local Storage
1943 if (I->isThreadLocal())
1946 printType(Out, I->getType()->getElementType(), false, GetValueName(I));
1948 if (I->hasExternalWeakLinkage())
1949 Out << " __EXTERNAL_WEAK__";
1954 // Function declarations
1955 Out << "\n/* Function Declarations */\n";
1956 Out << "double fmod(double, double);\n"; // Support for FP rem
1957 Out << "float fmodf(float, float);\n";
1958 Out << "long double fmodl(long double, long double);\n";
1960 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
1961 // Don't print declarations for intrinsic functions.
1962 if (!I->isIntrinsic() && I->getName() != "setjmp" &&
1963 I->getName() != "longjmp" && I->getName() != "_setjmp") {
1964 if (I->hasExternalWeakLinkage())
1966 printFunctionSignature(I, true);
1967 if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
1968 Out << " __ATTRIBUTE_WEAK__";
1969 if (I->hasExternalWeakLinkage())
1970 Out << " __EXTERNAL_WEAK__";
1971 if (StaticCtors.count(I))
1972 Out << " __ATTRIBUTE_CTOR__";
1973 if (StaticDtors.count(I))
1974 Out << " __ATTRIBUTE_DTOR__";
1975 if (I->hasHiddenVisibility())
1976 Out << " __HIDDEN__";
1978 if (I->hasName() && I->getName()[0] == 1)
1979 Out << " LLVM_ASM(\"" << I->getName().substr(1) << "\")";
1985 // Output the global variable declarations
1986 if (!M.global_empty()) {
1987 Out << "\n\n/* Global Variable Declarations */\n";
1988 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1990 if (!I->isDeclaration()) {
1991 // Ignore special globals, such as debug info.
1992 if (getGlobalVariableClass(I))
1995 if (I->hasLocalLinkage())
2000 // Thread Local Storage
2001 if (I->isThreadLocal())
2004 printType(Out, I->getType()->getElementType(), false,
2007 if (I->hasLinkOnceLinkage())
2008 Out << " __attribute__((common))";
2009 else if (I->hasCommonLinkage()) // FIXME is this right?
2010 Out << " __ATTRIBUTE_WEAK__";
2011 else if (I->hasWeakLinkage())
2012 Out << " __ATTRIBUTE_WEAK__";
2013 else if (I->hasExternalWeakLinkage())
2014 Out << " __EXTERNAL_WEAK__";
2015 if (I->hasHiddenVisibility())
2016 Out << " __HIDDEN__";
2021 // Output the global variable definitions and contents...
2022 if (!M.global_empty()) {
2023 Out << "\n\n/* Global Variable Definitions and Initialization */\n";
2024 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
2026 if (!I->isDeclaration()) {
2027 // Ignore special globals, such as debug info.
2028 if (getGlobalVariableClass(I))
2031 if (I->hasLocalLinkage())
2033 else if (I->hasDLLImportLinkage())
2034 Out << "__declspec(dllimport) ";
2035 else if (I->hasDLLExportLinkage())
2036 Out << "__declspec(dllexport) ";
2038 // Thread Local Storage
2039 if (I->isThreadLocal())
2042 printType(Out, I->getType()->getElementType(), false,
2044 if (I->hasLinkOnceLinkage())
2045 Out << " __attribute__((common))";
2046 else if (I->hasWeakLinkage())
2047 Out << " __ATTRIBUTE_WEAK__";
2048 else if (I->hasCommonLinkage())
2049 Out << " __ATTRIBUTE_WEAK__";
2051 if (I->hasHiddenVisibility())
2052 Out << " __HIDDEN__";
2054 // If the initializer is not null, emit the initializer. If it is null,
2055 // we try to avoid emitting large amounts of zeros. The problem with
2056 // this, however, occurs when the variable has weak linkage. In this
2057 // case, the assembler will complain about the variable being both weak
2058 // and common, so we disable this optimization.
2059 // FIXME common linkage should avoid this problem.
2060 if (!I->getInitializer()->isNullValue()) {
2062 writeOperand(I->getInitializer(), true);
2063 } else if (I->hasWeakLinkage()) {
2064 // We have to specify an initializer, but it doesn't have to be
2065 // complete. If the value is an aggregate, print out { 0 }, and let
2066 // the compiler figure out the rest of the zeros.
2068 if (isa<StructType>(I->getInitializer()->getType()) ||
2069 isa<VectorType>(I->getInitializer()->getType())) {
2071 } else if (isa<ArrayType>(I->getInitializer()->getType())) {
2072 // As with structs and vectors, but with an extra set of braces
2073 // because arrays are wrapped in structs.
2076 // Just print it out normally.
2077 writeOperand(I->getInitializer(), true);
2085 Out << "\n\n/* Function Bodies */\n";
2087 // Emit some helper functions for dealing with FCMP instruction's
2089 Out << "static inline int llvm_fcmp_ord(double X, double Y) { ";
2090 Out << "return X == X && Y == Y; }\n";
2091 Out << "static inline int llvm_fcmp_uno(double X, double Y) { ";
2092 Out << "return X != X || Y != Y; }\n";
2093 Out << "static inline int llvm_fcmp_ueq(double X, double Y) { ";
2094 Out << "return X == Y || llvm_fcmp_uno(X, Y); }\n";
2095 Out << "static inline int llvm_fcmp_une(double X, double Y) { ";
2096 Out << "return X != Y; }\n";
2097 Out << "static inline int llvm_fcmp_ult(double X, double Y) { ";
2098 Out << "return X < Y || llvm_fcmp_uno(X, Y); }\n";
2099 Out << "static inline int llvm_fcmp_ugt(double X, double Y) { ";
2100 Out << "return X > Y || llvm_fcmp_uno(X, Y); }\n";
2101 Out << "static inline int llvm_fcmp_ule(double X, double Y) { ";
2102 Out << "return X <= Y || llvm_fcmp_uno(X, Y); }\n";
2103 Out << "static inline int llvm_fcmp_uge(double X, double Y) { ";
2104 Out << "return X >= Y || llvm_fcmp_uno(X, Y); }\n";
2105 Out << "static inline int llvm_fcmp_oeq(double X, double Y) { ";
2106 Out << "return X == Y ; }\n";
2107 Out << "static inline int llvm_fcmp_one(double X, double Y) { ";
2108 Out << "return X != Y && llvm_fcmp_ord(X, Y); }\n";
2109 Out << "static inline int llvm_fcmp_olt(double X, double Y) { ";
2110 Out << "return X < Y ; }\n";
2111 Out << "static inline int llvm_fcmp_ogt(double X, double Y) { ";
2112 Out << "return X > Y ; }\n";
2113 Out << "static inline int llvm_fcmp_ole(double X, double Y) { ";
2114 Out << "return X <= Y ; }\n";
2115 Out << "static inline int llvm_fcmp_oge(double X, double Y) { ";
2116 Out << "return X >= Y ; }\n";
2121 /// Output all floating point constants that cannot be printed accurately...
2122 void CWriter::printFloatingPointConstants(Function &F) {
2123 // Scan the module for floating point constants. If any FP constant is used
2124 // in the function, we want to redirect it here so that we do not depend on
2125 // the precision of the printed form, unless the printed form preserves
2128 for (constant_iterator I = constant_begin(&F), E = constant_end(&F);
2130 printFloatingPointConstants(*I);
2135 void CWriter::printFloatingPointConstants(const Constant *C) {
2136 // If this is a constant expression, recursively check for constant fp values.
2137 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
2138 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i)
2139 printFloatingPointConstants(CE->getOperand(i));
2143 // Otherwise, check for a FP constant that we need to print.
2144 const ConstantFP *FPC = dyn_cast<ConstantFP>(C);
2146 // Do not put in FPConstantMap if safe.
2147 isFPCSafeToPrint(FPC) ||
2148 // Already printed this constant?
2149 FPConstantMap.count(FPC))
2152 FPConstantMap[FPC] = FPCounter; // Number the FP constants
2154 if (FPC->getType() == Type::getDoubleTy(FPC->getContext())) {
2155 double Val = FPC->getValueAPF().convertToDouble();
2156 uint64_t i = FPC->getValueAPF().bitcastToAPInt().getZExtValue();
2157 Out << "static const ConstantDoubleTy FPConstant" << FPCounter++
2158 << " = 0x" << utohexstr(i)
2159 << "ULL; /* " << Val << " */\n";
2160 } else if (FPC->getType() == Type::getFloatTy(FPC->getContext())) {
2161 float Val = FPC->getValueAPF().convertToFloat();
2162 uint32_t i = (uint32_t)FPC->getValueAPF().bitcastToAPInt().
2164 Out << "static const ConstantFloatTy FPConstant" << FPCounter++
2165 << " = 0x" << utohexstr(i)
2166 << "U; /* " << Val << " */\n";
2167 } else if (FPC->getType() == Type::getX86_FP80Ty(FPC->getContext())) {
2168 // api needed to prevent premature destruction
2169 APInt api = FPC->getValueAPF().bitcastToAPInt();
2170 const uint64_t *p = api.getRawData();
2171 Out << "static const ConstantFP80Ty FPConstant" << FPCounter++
2172 << " = { 0x" << utohexstr(p[0])
2173 << "ULL, 0x" << utohexstr((uint16_t)p[1]) << ",{0,0,0}"
2174 << "}; /* Long double constant */\n";
2175 } else if (FPC->getType() == Type::getPPC_FP128Ty(FPC->getContext()) ||
2176 FPC->getType() == Type::getFP128Ty(FPC->getContext())) {
2177 APInt api = FPC->getValueAPF().bitcastToAPInt();
2178 const uint64_t *p = api.getRawData();
2179 Out << "static const ConstantFP128Ty FPConstant" << FPCounter++
2181 << utohexstr(p[0]) << ", 0x" << utohexstr(p[1])
2182 << "}; /* Long double constant */\n";
2185 llvm_unreachable("Unknown float type!");
2191 /// printSymbolTable - Run through symbol table looking for type names. If a
2192 /// type name is found, emit its declaration...
2194 void CWriter::printModuleTypes(const TypeSymbolTable &TST) {
2195 Out << "/* Helper union for bitcasts */\n";
2196 Out << "typedef union {\n";
2197 Out << " unsigned int Int32;\n";
2198 Out << " unsigned long long Int64;\n";
2199 Out << " float Float;\n";
2200 Out << " double Double;\n";
2201 Out << "} llvmBitCastUnion;\n";
2203 // We are only interested in the type plane of the symbol table.
2204 TypeSymbolTable::const_iterator I = TST.begin();
2205 TypeSymbolTable::const_iterator End = TST.end();
2207 // If there are no type names, exit early.
2208 if (I == End) return;
2210 // Print out forward declarations for structure types before anything else!
2211 Out << "/* Structure forward decls */\n";
2212 for (; I != End; ++I) {
2213 std::string Name = "struct l_" + Mang->makeNameProper(I->first);
2214 Out << Name << ";\n";
2215 TypeNames.insert(std::make_pair(I->second, Name));
2220 // Now we can print out typedefs. Above, we guaranteed that this can only be
2221 // for struct or opaque types.
2222 Out << "/* Typedefs */\n";
2223 for (I = TST.begin(); I != End; ++I) {
2224 std::string Name = "l_" + Mang->makeNameProper(I->first);
2226 printType(Out, I->second, false, Name);
2232 // Keep track of which structures have been printed so far...
2233 std::set<const Type *> StructPrinted;
2235 // Loop over all structures then push them into the stack so they are
2236 // printed in the correct order.
2238 Out << "/* Structure contents */\n";
2239 for (I = TST.begin(); I != End; ++I)
2240 if (isa<StructType>(I->second) || isa<ArrayType>(I->second))
2241 // Only print out used types!
2242 printContainedStructs(I->second, StructPrinted);
2245 // Push the struct onto the stack and recursively push all structs
2246 // this one depends on.
2248 // TODO: Make this work properly with vector types
2250 void CWriter::printContainedStructs(const Type *Ty,
2251 std::set<const Type*> &StructPrinted) {
2252 // Don't walk through pointers.
2253 if (isa<PointerType>(Ty) || Ty->isPrimitiveType() || Ty->isInteger()) return;
2255 // Print all contained types first.
2256 for (Type::subtype_iterator I = Ty->subtype_begin(),
2257 E = Ty->subtype_end(); I != E; ++I)
2258 printContainedStructs(*I, StructPrinted);
2260 if (isa<StructType>(Ty) || isa<ArrayType>(Ty)) {
2261 // Check to see if we have already printed this struct.
2262 if (StructPrinted.insert(Ty).second) {
2263 // Print structure type out.
2264 std::string Name = TypeNames[Ty];
2265 printType(Out, Ty, false, Name, true);
2271 void CWriter::printFunctionSignature(const Function *F, bool Prototype) {
2272 /// isStructReturn - Should this function actually return a struct by-value?
2273 bool isStructReturn = F->hasStructRetAttr();
2275 if (F->hasLocalLinkage()) Out << "static ";
2276 if (F->hasDLLImportLinkage()) Out << "__declspec(dllimport) ";
2277 if (F->hasDLLExportLinkage()) Out << "__declspec(dllexport) ";
2278 switch (F->getCallingConv()) {
2279 case CallingConv::X86_StdCall:
2280 Out << "__attribute__((stdcall)) ";
2282 case CallingConv::X86_FastCall:
2283 Out << "__attribute__((fastcall)) ";
2289 // Loop over the arguments, printing them...
2290 const FunctionType *FT = cast<FunctionType>(F->getFunctionType());
2291 const AttrListPtr &PAL = F->getAttributes();
2293 std::stringstream FunctionInnards;
2295 // Print out the name...
2296 FunctionInnards << GetValueName(F) << '(';
2298 bool PrintedArg = false;
2299 if (!F->isDeclaration()) {
2300 if (!F->arg_empty()) {
2301 Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
2304 // If this is a struct-return function, don't print the hidden
2305 // struct-return argument.
2306 if (isStructReturn) {
2307 assert(I != E && "Invalid struct return function!");
2312 std::string ArgName;
2313 for (; I != E; ++I) {
2314 if (PrintedArg) FunctionInnards << ", ";
2315 if (I->hasName() || !Prototype)
2316 ArgName = GetValueName(I);
2319 const Type *ArgTy = I->getType();
2320 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2321 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2322 ByValParams.insert(I);
2324 printType(FunctionInnards, ArgTy,
2325 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt),
2332 // Loop over the arguments, printing them.
2333 FunctionType::param_iterator I = FT->param_begin(), E = FT->param_end();
2336 // If this is a struct-return function, don't print the hidden
2337 // struct-return argument.
2338 if (isStructReturn) {
2339 assert(I != E && "Invalid struct return function!");
2344 for (; I != E; ++I) {
2345 if (PrintedArg) FunctionInnards << ", ";
2346 const Type *ArgTy = *I;
2347 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2348 assert(isa<PointerType>(ArgTy));
2349 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2351 printType(FunctionInnards, ArgTy,
2352 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt));
2358 // Finish printing arguments... if this is a vararg function, print the ...,
2359 // unless there are no known types, in which case, we just emit ().
2361 if (FT->isVarArg() && PrintedArg) {
2362 if (PrintedArg) FunctionInnards << ", ";
2363 FunctionInnards << "..."; // Output varargs portion of signature!
2364 } else if (!FT->isVarArg() && !PrintedArg) {
2365 FunctionInnards << "void"; // ret() -> ret(void) in C.
2367 FunctionInnards << ')';
2369 // Get the return tpe for the function.
2371 if (!isStructReturn)
2372 RetTy = F->getReturnType();
2374 // If this is a struct-return function, print the struct-return type.
2375 RetTy = cast<PointerType>(FT->getParamType(0))->getElementType();
2378 // Print out the return type and the signature built above.
2379 printType(Out, RetTy,
2380 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt),
2381 FunctionInnards.str());
2384 static inline bool isFPIntBitCast(const Instruction &I) {
2385 if (!isa<BitCastInst>(I))
2387 const Type *SrcTy = I.getOperand(0)->getType();
2388 const Type *DstTy = I.getType();
2389 return (SrcTy->isFloatingPoint() && DstTy->isInteger()) ||
2390 (DstTy->isFloatingPoint() && SrcTy->isInteger());
2393 void CWriter::printFunction(Function &F) {
2394 /// isStructReturn - Should this function actually return a struct by-value?
2395 bool isStructReturn = F.hasStructRetAttr();
2397 printFunctionSignature(&F, false);
2400 // If this is a struct return function, handle the result with magic.
2401 if (isStructReturn) {
2402 const Type *StructTy =
2403 cast<PointerType>(F.arg_begin()->getType())->getElementType();
2405 printType(Out, StructTy, false, "StructReturn");
2406 Out << "; /* Struct return temporary */\n";
2409 printType(Out, F.arg_begin()->getType(), false,
2410 GetValueName(F.arg_begin()));
2411 Out << " = &StructReturn;\n";
2414 bool PrintedVar = false;
2416 // print local variable information for the function
2417 for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I) {
2418 if (const AllocaInst *AI = isDirectAlloca(&*I)) {
2420 printType(Out, AI->getAllocatedType(), false, GetValueName(AI));
2421 Out << "; /* Address-exposed local */\n";
2423 } else if (I->getType() != Type::getVoidTy(F.getContext()) &&
2424 !isInlinableInst(*I)) {
2426 printType(Out, I->getType(), false, GetValueName(&*I));
2429 if (isa<PHINode>(*I)) { // Print out PHI node temporaries as well...
2431 printType(Out, I->getType(), false,
2432 GetValueName(&*I)+"__PHI_TEMPORARY");
2437 // We need a temporary for the BitCast to use so it can pluck a value out
2438 // of a union to do the BitCast. This is separate from the need for a
2439 // variable to hold the result of the BitCast.
2440 if (isFPIntBitCast(*I)) {
2441 Out << " llvmBitCastUnion " << GetValueName(&*I)
2442 << "__BITCAST_TEMPORARY;\n";
2450 if (F.hasExternalLinkage() && F.getName() == "main")
2451 Out << " CODE_FOR_MAIN();\n";
2453 // print the basic blocks
2454 for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
2455 if (Loop *L = LI->getLoopFor(BB)) {
2456 if (L->getHeader() == BB && L->getParentLoop() == 0)
2459 printBasicBlock(BB);
2466 void CWriter::printLoop(Loop *L) {
2467 Out << " do { /* Syntactic loop '" << L->getHeader()->getName()
2468 << "' to make GCC happy */\n";
2469 for (unsigned i = 0, e = L->getBlocks().size(); i != e; ++i) {
2470 BasicBlock *BB = L->getBlocks()[i];
2471 Loop *BBLoop = LI->getLoopFor(BB);
2473 printBasicBlock(BB);
2474 else if (BB == BBLoop->getHeader() && BBLoop->getParentLoop() == L)
2477 Out << " } while (1); /* end of syntactic loop '"
2478 << L->getHeader()->getName() << "' */\n";
2481 void CWriter::printBasicBlock(BasicBlock *BB) {
2483 // Don't print the label for the basic block if there are no uses, or if
2484 // the only terminator use is the predecessor basic block's terminator.
2485 // We have to scan the use list because PHI nodes use basic blocks too but
2486 // do not require a label to be generated.
2488 bool NeedsLabel = false;
2489 for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI)
2490 if (isGotoCodeNecessary(*PI, BB)) {
2495 if (NeedsLabel) Out << GetValueName(BB) << ":\n";
2497 // Output all of the instructions in the basic block...
2498 for (BasicBlock::iterator II = BB->begin(), E = --BB->end(); II != E;
2500 if (!isInlinableInst(*II) && !isDirectAlloca(II)) {
2501 if (II->getType() != Type::getVoidTy(BB->getContext()) &&
2506 writeInstComputationInline(*II);
2511 // Don't emit prefix or suffix for the terminator.
2512 visit(*BB->getTerminator());
2516 // Specific Instruction type classes... note that all of the casts are
2517 // necessary because we use the instruction classes as opaque types...
2519 void CWriter::visitReturnInst(ReturnInst &I) {
2520 // If this is a struct return function, return the temporary struct.
2521 bool isStructReturn = I.getParent()->getParent()->hasStructRetAttr();
2523 if (isStructReturn) {
2524 Out << " return StructReturn;\n";
2528 // Don't output a void return if this is the last basic block in the function
2529 if (I.getNumOperands() == 0 &&
2530 &*--I.getParent()->getParent()->end() == I.getParent() &&
2531 !I.getParent()->size() == 1) {
2535 if (I.getNumOperands() > 1) {
2538 printType(Out, I.getParent()->getParent()->getReturnType());
2539 Out << " llvm_cbe_mrv_temp = {\n";
2540 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
2542 writeOperand(I.getOperand(i));
2548 Out << " return llvm_cbe_mrv_temp;\n";
2554 if (I.getNumOperands()) {
2556 writeOperand(I.getOperand(0));
2561 void CWriter::visitSwitchInst(SwitchInst &SI) {
2564 writeOperand(SI.getOperand(0));
2565 Out << ") {\n default:\n";
2566 printPHICopiesForSuccessor (SI.getParent(), SI.getDefaultDest(), 2);
2567 printBranchToBlock(SI.getParent(), SI.getDefaultDest(), 2);
2569 for (unsigned i = 2, e = SI.getNumOperands(); i != e; i += 2) {
2571 writeOperand(SI.getOperand(i));
2573 BasicBlock *Succ = cast<BasicBlock>(SI.getOperand(i+1));
2574 printPHICopiesForSuccessor (SI.getParent(), Succ, 2);
2575 printBranchToBlock(SI.getParent(), Succ, 2);
2576 if (Function::iterator(Succ) == next(Function::iterator(SI.getParent())))
2582 void CWriter::visitIndBrInst(IndBrInst &IBI) {
2583 Out << " goto *(void*)(";
2584 writeOperand(IBI.getOperand(0));
2588 void CWriter::visitUnreachableInst(UnreachableInst &I) {
2589 Out << " /*UNREACHABLE*/;\n";
2592 bool CWriter::isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
2593 /// FIXME: This should be reenabled, but loop reordering safe!!
2596 if (next(Function::iterator(From)) != Function::iterator(To))
2597 return true; // Not the direct successor, we need a goto.
2599 //isa<SwitchInst>(From->getTerminator())
2601 if (LI->getLoopFor(From) != LI->getLoopFor(To))
2606 void CWriter::printPHICopiesForSuccessor (BasicBlock *CurBlock,
2607 BasicBlock *Successor,
2609 for (BasicBlock::iterator I = Successor->begin(); isa<PHINode>(I); ++I) {
2610 PHINode *PN = cast<PHINode>(I);
2611 // Now we have to do the printing.
2612 Value *IV = PN->getIncomingValueForBlock(CurBlock);
2613 if (!isa<UndefValue>(IV)) {
2614 Out << std::string(Indent, ' ');
2615 Out << " " << GetValueName(I) << "__PHI_TEMPORARY = ";
2617 Out << "; /* for PHI node */\n";
2622 void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
2624 if (isGotoCodeNecessary(CurBB, Succ)) {
2625 Out << std::string(Indent, ' ') << " goto ";
2631 // Branch instruction printing - Avoid printing out a branch to a basic block
2632 // that immediately succeeds the current one.
2634 void CWriter::visitBranchInst(BranchInst &I) {
2636 if (I.isConditional()) {
2637 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(0))) {
2639 writeOperand(I.getCondition());
2642 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 2);
2643 printBranchToBlock(I.getParent(), I.getSuccessor(0), 2);
2645 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(1))) {
2646 Out << " } else {\n";
2647 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2648 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2651 // First goto not necessary, assume second one is...
2653 writeOperand(I.getCondition());
2656 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2657 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2662 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 0);
2663 printBranchToBlock(I.getParent(), I.getSuccessor(0), 0);
2668 // PHI nodes get copied into temporary values at the end of predecessor basic
2669 // blocks. We now need to copy these temporary values into the REAL value for
2671 void CWriter::visitPHINode(PHINode &I) {
2673 Out << "__PHI_TEMPORARY";
2677 void CWriter::visitBinaryOperator(Instruction &I) {
2678 // binary instructions, shift instructions, setCond instructions.
2679 assert(!isa<PointerType>(I.getType()));
2681 // We must cast the results of binary operations which might be promoted.
2682 bool needsCast = false;
2683 if ((I.getType() == Type::getInt8Ty(I.getContext())) ||
2684 (I.getType() == Type::getInt16Ty(I.getContext()))
2685 || (I.getType() == Type::getFloatTy(I.getContext()))) {
2688 printType(Out, I.getType(), false);
2692 // If this is a negation operation, print it out as such. For FP, we don't
2693 // want to print "-0.0 - X".
2694 if (BinaryOperator::isNeg(&I)) {
2696 writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
2698 } else if (BinaryOperator::isFNeg(&I)) {
2700 writeOperand(BinaryOperator::getFNegArgument(cast<BinaryOperator>(&I)));
2702 } else if (I.getOpcode() == Instruction::FRem) {
2703 // Output a call to fmod/fmodf instead of emitting a%b
2704 if (I.getType() == Type::getFloatTy(I.getContext()))
2706 else if (I.getType() == Type::getDoubleTy(I.getContext()))
2708 else // all 3 flavors of long double
2710 writeOperand(I.getOperand(0));
2712 writeOperand(I.getOperand(1));
2716 // Write out the cast of the instruction's value back to the proper type
2718 bool NeedsClosingParens = writeInstructionCast(I);
2720 // Certain instructions require the operand to be forced to a specific type
2721 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2722 // below for operand 1
2723 writeOperandWithCast(I.getOperand(0), I.getOpcode());
2725 switch (I.getOpcode()) {
2726 case Instruction::Add:
2727 case Instruction::FAdd: Out << " + "; break;
2728 case Instruction::Sub:
2729 case Instruction::FSub: Out << " - "; break;
2730 case Instruction::Mul:
2731 case Instruction::FMul: Out << " * "; break;
2732 case Instruction::URem:
2733 case Instruction::SRem:
2734 case Instruction::FRem: Out << " % "; break;
2735 case Instruction::UDiv:
2736 case Instruction::SDiv:
2737 case Instruction::FDiv: Out << " / "; break;
2738 case Instruction::And: Out << " & "; break;
2739 case Instruction::Or: Out << " | "; break;
2740 case Instruction::Xor: Out << " ^ "; break;
2741 case Instruction::Shl : Out << " << "; break;
2742 case Instruction::LShr:
2743 case Instruction::AShr: Out << " >> "; break;
2746 errs() << "Invalid operator type!" << I;
2748 llvm_unreachable(0);
2751 writeOperandWithCast(I.getOperand(1), I.getOpcode());
2752 if (NeedsClosingParens)
2761 void CWriter::visitICmpInst(ICmpInst &I) {
2762 // We must cast the results of icmp which might be promoted.
2763 bool needsCast = false;
2765 // Write out the cast of the instruction's value back to the proper type
2767 bool NeedsClosingParens = writeInstructionCast(I);
2769 // Certain icmp predicate require the operand to be forced to a specific type
2770 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2771 // below for operand 1
2772 writeOperandWithCast(I.getOperand(0), I);
2774 switch (I.getPredicate()) {
2775 case ICmpInst::ICMP_EQ: Out << " == "; break;
2776 case ICmpInst::ICMP_NE: Out << " != "; break;
2777 case ICmpInst::ICMP_ULE:
2778 case ICmpInst::ICMP_SLE: Out << " <= "; break;
2779 case ICmpInst::ICMP_UGE:
2780 case ICmpInst::ICMP_SGE: Out << " >= "; break;
2781 case ICmpInst::ICMP_ULT:
2782 case ICmpInst::ICMP_SLT: Out << " < "; break;
2783 case ICmpInst::ICMP_UGT:
2784 case ICmpInst::ICMP_SGT: Out << " > "; break;
2787 errs() << "Invalid icmp predicate!" << I;
2789 llvm_unreachable(0);
2792 writeOperandWithCast(I.getOperand(1), I);
2793 if (NeedsClosingParens)
2801 void CWriter::visitFCmpInst(FCmpInst &I) {
2802 if (I.getPredicate() == FCmpInst::FCMP_FALSE) {
2806 if (I.getPredicate() == FCmpInst::FCMP_TRUE) {
2812 switch (I.getPredicate()) {
2813 default: llvm_unreachable("Illegal FCmp predicate");
2814 case FCmpInst::FCMP_ORD: op = "ord"; break;
2815 case FCmpInst::FCMP_UNO: op = "uno"; break;
2816 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
2817 case FCmpInst::FCMP_UNE: op = "une"; break;
2818 case FCmpInst::FCMP_ULT: op = "ult"; break;
2819 case FCmpInst::FCMP_ULE: op = "ule"; break;
2820 case FCmpInst::FCMP_UGT: op = "ugt"; break;
2821 case FCmpInst::FCMP_UGE: op = "uge"; break;
2822 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
2823 case FCmpInst::FCMP_ONE: op = "one"; break;
2824 case FCmpInst::FCMP_OLT: op = "olt"; break;
2825 case FCmpInst::FCMP_OLE: op = "ole"; break;
2826 case FCmpInst::FCMP_OGT: op = "ogt"; break;
2827 case FCmpInst::FCMP_OGE: op = "oge"; break;
2830 Out << "llvm_fcmp_" << op << "(";
2831 // Write the first operand
2832 writeOperand(I.getOperand(0));
2834 // Write the second operand
2835 writeOperand(I.getOperand(1));
2839 static const char * getFloatBitCastField(const Type *Ty) {
2840 switch (Ty->getTypeID()) {
2841 default: llvm_unreachable("Invalid Type");
2842 case Type::FloatTyID: return "Float";
2843 case Type::DoubleTyID: return "Double";
2844 case Type::IntegerTyID: {
2845 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
2854 void CWriter::visitCastInst(CastInst &I) {
2855 const Type *DstTy = I.getType();
2856 const Type *SrcTy = I.getOperand(0)->getType();
2857 if (isFPIntBitCast(I)) {
2859 // These int<->float and long<->double casts need to be handled specially
2860 Out << GetValueName(&I) << "__BITCAST_TEMPORARY."
2861 << getFloatBitCastField(I.getOperand(0)->getType()) << " = ";
2862 writeOperand(I.getOperand(0));
2863 Out << ", " << GetValueName(&I) << "__BITCAST_TEMPORARY."
2864 << getFloatBitCastField(I.getType());
2870 printCast(I.getOpcode(), SrcTy, DstTy);
2872 // Make a sext from i1 work by subtracting the i1 from 0 (an int).
2873 if (SrcTy == Type::getInt1Ty(I.getContext()) &&
2874 I.getOpcode() == Instruction::SExt)
2877 writeOperand(I.getOperand(0));
2879 if (DstTy == Type::getInt1Ty(I.getContext()) &&
2880 (I.getOpcode() == Instruction::Trunc ||
2881 I.getOpcode() == Instruction::FPToUI ||
2882 I.getOpcode() == Instruction::FPToSI ||
2883 I.getOpcode() == Instruction::PtrToInt)) {
2884 // Make sure we really get a trunc to bool by anding the operand with 1
2890 void CWriter::visitSelectInst(SelectInst &I) {
2892 writeOperand(I.getCondition());
2894 writeOperand(I.getTrueValue());
2896 writeOperand(I.getFalseValue());
2901 void CWriter::lowerIntrinsics(Function &F) {
2902 // This is used to keep track of intrinsics that get generated to a lowered
2903 // function. We must generate the prototypes before the function body which
2904 // will only be expanded on first use (by the loop below).
2905 std::vector<Function*> prototypesToGen;
2907 // Examine all the instructions in this function to find the intrinsics that
2908 // need to be lowered.
2909 for (Function::iterator BB = F.begin(), EE = F.end(); BB != EE; ++BB)
2910 for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; )
2911 if (CallInst *CI = dyn_cast<CallInst>(I++))
2912 if (Function *F = CI->getCalledFunction())
2913 switch (F->getIntrinsicID()) {
2914 case Intrinsic::not_intrinsic:
2915 case Intrinsic::memory_barrier:
2916 case Intrinsic::vastart:
2917 case Intrinsic::vacopy:
2918 case Intrinsic::vaend:
2919 case Intrinsic::returnaddress:
2920 case Intrinsic::frameaddress:
2921 case Intrinsic::setjmp:
2922 case Intrinsic::longjmp:
2923 case Intrinsic::prefetch:
2924 case Intrinsic::dbg_stoppoint:
2925 case Intrinsic::powi:
2926 case Intrinsic::x86_sse_cmp_ss:
2927 case Intrinsic::x86_sse_cmp_ps:
2928 case Intrinsic::x86_sse2_cmp_sd:
2929 case Intrinsic::x86_sse2_cmp_pd:
2930 case Intrinsic::ppc_altivec_lvsl:
2931 // We directly implement these intrinsics
2934 // If this is an intrinsic that directly corresponds to a GCC
2935 // builtin, we handle it.
2936 const char *BuiltinName = "";
2937 #define GET_GCC_BUILTIN_NAME
2938 #include "llvm/Intrinsics.gen"
2939 #undef GET_GCC_BUILTIN_NAME
2940 // If we handle it, don't lower it.
2941 if (BuiltinName[0]) break;
2943 // All other intrinsic calls we must lower.
2944 Instruction *Before = 0;
2945 if (CI != &BB->front())
2946 Before = prior(BasicBlock::iterator(CI));
2948 IL->LowerIntrinsicCall(CI);
2949 if (Before) { // Move iterator to instruction after call
2954 // If the intrinsic got lowered to another call, and that call has
2955 // a definition then we need to make sure its prototype is emitted
2956 // before any calls to it.
2957 if (CallInst *Call = dyn_cast<CallInst>(I))
2958 if (Function *NewF = Call->getCalledFunction())
2959 if (!NewF->isDeclaration())
2960 prototypesToGen.push_back(NewF);
2965 // We may have collected some prototypes to emit in the loop above.
2966 // Emit them now, before the function that uses them is emitted. But,
2967 // be careful not to emit them twice.
2968 std::vector<Function*>::iterator I = prototypesToGen.begin();
2969 std::vector<Function*>::iterator E = prototypesToGen.end();
2970 for ( ; I != E; ++I) {
2971 if (intrinsicPrototypesAlreadyGenerated.insert(*I).second) {
2973 printFunctionSignature(*I, true);
2979 void CWriter::visitCallInst(CallInst &I) {
2980 if (isa<InlineAsm>(I.getOperand(0)))
2981 return visitInlineAsm(I);
2983 bool WroteCallee = false;
2985 // Handle intrinsic function calls first...
2986 if (Function *F = I.getCalledFunction())
2987 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
2988 if (visitBuiltinCall(I, ID, WroteCallee))
2991 Value *Callee = I.getCalledValue();
2993 const PointerType *PTy = cast<PointerType>(Callee->getType());
2994 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
2996 // If this is a call to a struct-return function, assign to the first
2997 // parameter instead of passing it to the call.
2998 const AttrListPtr &PAL = I.getAttributes();
2999 bool hasByVal = I.hasByValArgument();
3000 bool isStructRet = I.hasStructRetAttr();
3002 writeOperandDeref(I.getOperand(1));
3006 if (I.isTailCall()) Out << " /*tail*/ ";
3009 // If this is an indirect call to a struct return function, we need to cast
3010 // the pointer. Ditto for indirect calls with byval arguments.
3011 bool NeedsCast = (hasByVal || isStructRet) && !isa<Function>(Callee);
3013 // GCC is a real PITA. It does not permit codegening casts of functions to
3014 // function pointers if they are in a call (it generates a trap instruction
3015 // instead!). We work around this by inserting a cast to void* in between
3016 // the function and the function pointer cast. Unfortunately, we can't just
3017 // form the constant expression here, because the folder will immediately
3020 // Note finally, that this is completely unsafe. ANSI C does not guarantee
3021 // that void* and function pointers have the same size. :( To deal with this
3022 // in the common case, we handle casts where the number of arguments passed
3025 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Callee))
3027 if (Function *RF = dyn_cast<Function>(CE->getOperand(0))) {
3033 // Ok, just cast the pointer type.
3036 printStructReturnPointerFunctionType(Out, PAL,
3037 cast<PointerType>(I.getCalledValue()->getType()));
3039 printType(Out, I.getCalledValue()->getType(), false, "", true, PAL);
3041 printType(Out, I.getCalledValue()->getType());
3044 writeOperand(Callee);
3045 if (NeedsCast) Out << ')';
3050 unsigned NumDeclaredParams = FTy->getNumParams();
3052 CallSite::arg_iterator AI = I.op_begin()+1, AE = I.op_end();
3054 if (isStructRet) { // Skip struct return argument.
3059 bool PrintedArg = false;
3060 for (; AI != AE; ++AI, ++ArgNo) {
3061 if (PrintedArg) Out << ", ";
3062 if (ArgNo < NumDeclaredParams &&
3063 (*AI)->getType() != FTy->getParamType(ArgNo)) {
3065 printType(Out, FTy->getParamType(ArgNo),
3066 /*isSigned=*/PAL.paramHasAttr(ArgNo+1, Attribute::SExt));
3069 // Check if the argument is expected to be passed by value.
3070 if (I.paramHasAttr(ArgNo+1, Attribute::ByVal))
3071 writeOperandDeref(*AI);
3079 /// visitBuiltinCall - Handle the call to the specified builtin. Returns true
3080 /// if the entire call is handled, return false it it wasn't handled, and
3081 /// optionally set 'WroteCallee' if the callee has already been printed out.
3082 bool CWriter::visitBuiltinCall(CallInst &I, Intrinsic::ID ID,
3083 bool &WroteCallee) {
3086 // If this is an intrinsic that directly corresponds to a GCC
3087 // builtin, we emit it here.
3088 const char *BuiltinName = "";
3089 Function *F = I.getCalledFunction();
3090 #define GET_GCC_BUILTIN_NAME
3091 #include "llvm/Intrinsics.gen"
3092 #undef GET_GCC_BUILTIN_NAME
3093 assert(BuiltinName[0] && "Unknown LLVM intrinsic!");
3099 case Intrinsic::memory_barrier:
3100 Out << "__sync_synchronize()";
3102 case Intrinsic::vastart:
3105 Out << "va_start(*(va_list*)";
3106 writeOperand(I.getOperand(1));
3108 // Output the last argument to the enclosing function.
3109 if (I.getParent()->getParent()->arg_empty()) {
3111 raw_string_ostream Msg(msg);
3112 Msg << "The C backend does not currently support zero "
3113 << "argument varargs functions, such as '"
3114 << I.getParent()->getParent()->getName() << "'!";
3115 llvm_report_error(Msg.str());
3117 writeOperand(--I.getParent()->getParent()->arg_end());
3120 case Intrinsic::vaend:
3121 if (!isa<ConstantPointerNull>(I.getOperand(1))) {
3122 Out << "0; va_end(*(va_list*)";
3123 writeOperand(I.getOperand(1));
3126 Out << "va_end(*(va_list*)0)";
3129 case Intrinsic::vacopy:
3131 Out << "va_copy(*(va_list*)";
3132 writeOperand(I.getOperand(1));
3133 Out << ", *(va_list*)";
3134 writeOperand(I.getOperand(2));
3137 case Intrinsic::returnaddress:
3138 Out << "__builtin_return_address(";
3139 writeOperand(I.getOperand(1));
3142 case Intrinsic::frameaddress:
3143 Out << "__builtin_frame_address(";
3144 writeOperand(I.getOperand(1));
3147 case Intrinsic::powi:
3148 Out << "__builtin_powi(";
3149 writeOperand(I.getOperand(1));
3151 writeOperand(I.getOperand(2));
3154 case Intrinsic::setjmp:
3155 Out << "setjmp(*(jmp_buf*)";
3156 writeOperand(I.getOperand(1));
3159 case Intrinsic::longjmp:
3160 Out << "longjmp(*(jmp_buf*)";
3161 writeOperand(I.getOperand(1));
3163 writeOperand(I.getOperand(2));
3166 case Intrinsic::prefetch:
3167 Out << "LLVM_PREFETCH((const void *)";
3168 writeOperand(I.getOperand(1));
3170 writeOperand(I.getOperand(2));
3172 writeOperand(I.getOperand(3));
3175 case Intrinsic::stacksave:
3176 // Emit this as: Val = 0; *((void**)&Val) = __builtin_stack_save()
3177 // to work around GCC bugs (see PR1809).
3178 Out << "0; *((void**)&" << GetValueName(&I)
3179 << ") = __builtin_stack_save()";
3181 case Intrinsic::dbg_stoppoint: {
3182 // If we use writeOperand directly we get a "u" suffix which is rejected
3184 DbgStopPointInst &SPI = cast<DbgStopPointInst>(I);
3186 GetConstantStringInfo(SPI.getDirectory(), dir);
3188 GetConstantStringInfo(SPI.getFileName(), file);
3192 << dir << '/' << file << "\"\n";
3195 case Intrinsic::x86_sse_cmp_ss:
3196 case Intrinsic::x86_sse_cmp_ps:
3197 case Intrinsic::x86_sse2_cmp_sd:
3198 case Intrinsic::x86_sse2_cmp_pd:
3200 printType(Out, I.getType());
3202 // Multiple GCC builtins multiplex onto this intrinsic.
3203 switch (cast<ConstantInt>(I.getOperand(3))->getZExtValue()) {
3204 default: llvm_unreachable("Invalid llvm.x86.sse.cmp!");
3205 case 0: Out << "__builtin_ia32_cmpeq"; break;
3206 case 1: Out << "__builtin_ia32_cmplt"; break;
3207 case 2: Out << "__builtin_ia32_cmple"; break;
3208 case 3: Out << "__builtin_ia32_cmpunord"; break;
3209 case 4: Out << "__builtin_ia32_cmpneq"; break;
3210 case 5: Out << "__builtin_ia32_cmpnlt"; break;
3211 case 6: Out << "__builtin_ia32_cmpnle"; break;
3212 case 7: Out << "__builtin_ia32_cmpord"; break;
3214 if (ID == Intrinsic::x86_sse_cmp_ps || ID == Intrinsic::x86_sse2_cmp_pd)
3218 if (ID == Intrinsic::x86_sse_cmp_ss || ID == Intrinsic::x86_sse_cmp_ps)
3224 writeOperand(I.getOperand(1));
3226 writeOperand(I.getOperand(2));
3229 case Intrinsic::ppc_altivec_lvsl:
3231 printType(Out, I.getType());
3233 Out << "__builtin_altivec_lvsl(0, (void*)";
3234 writeOperand(I.getOperand(1));
3240 //This converts the llvm constraint string to something gcc is expecting.
3241 //TODO: work out platform independent constraints and factor those out
3242 // of the per target tables
3243 // handle multiple constraint codes
3244 std::string CWriter::InterpretASMConstraint(InlineAsm::ConstraintInfo& c) {
3246 assert(c.Codes.size() == 1 && "Too many asm constraint codes to handle");
3248 const char *const *table = 0;
3250 // Grab the translation table from MCAsmInfo if it exists.
3252 std::string Triple = TheModule->getTargetTriple();
3254 Triple = llvm::sys::getHostTriple();
3257 if (const Target *Match = TargetRegistry::lookupTarget(Triple, E))
3258 TAsm = Match->createAsmInfo(Triple);
3261 table = TAsm->getAsmCBE();
3263 // Search the translation table if it exists.
3264 for (int i = 0; table && table[i]; i += 2)
3265 if (c.Codes[0] == table[i])
3268 // Default is identity.
3272 //TODO: import logic from AsmPrinter.cpp
3273 static std::string gccifyAsm(std::string asmstr) {
3274 for (std::string::size_type i = 0; i != asmstr.size(); ++i)
3275 if (asmstr[i] == '\n')
3276 asmstr.replace(i, 1, "\\n");
3277 else if (asmstr[i] == '\t')
3278 asmstr.replace(i, 1, "\\t");
3279 else if (asmstr[i] == '$') {
3280 if (asmstr[i + 1] == '{') {
3281 std::string::size_type a = asmstr.find_first_of(':', i + 1);
3282 std::string::size_type b = asmstr.find_first_of('}', i + 1);
3283 std::string n = "%" +
3284 asmstr.substr(a + 1, b - a - 1) +
3285 asmstr.substr(i + 2, a - i - 2);
3286 asmstr.replace(i, b - i + 1, n);
3289 asmstr.replace(i, 1, "%");
3291 else if (asmstr[i] == '%')//grr
3292 { asmstr.replace(i, 1, "%%"); ++i;}
3297 //TODO: assumptions about what consume arguments from the call are likely wrong
3298 // handle communitivity
3299 void CWriter::visitInlineAsm(CallInst &CI) {
3300 InlineAsm* as = cast<InlineAsm>(CI.getOperand(0));
3301 std::vector<InlineAsm::ConstraintInfo> Constraints = as->ParseConstraints();
3303 std::vector<std::pair<Value*, int> > ResultVals;
3304 if (CI.getType() == Type::getVoidTy(CI.getContext()))
3306 else if (const StructType *ST = dyn_cast<StructType>(CI.getType())) {
3307 for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i)
3308 ResultVals.push_back(std::make_pair(&CI, (int)i));
3310 ResultVals.push_back(std::make_pair(&CI, -1));
3313 // Fix up the asm string for gcc and emit it.
3314 Out << "__asm__ volatile (\"" << gccifyAsm(as->getAsmString()) << "\"\n";
3317 unsigned ValueCount = 0;
3318 bool IsFirst = true;
3320 // Convert over all the output constraints.
3321 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3322 E = Constraints.end(); I != E; ++I) {
3324 if (I->Type != InlineAsm::isOutput) {
3326 continue; // Ignore non-output constraints.
3329 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3330 std::string C = InterpretASMConstraint(*I);
3331 if (C.empty()) continue;
3342 if (ValueCount < ResultVals.size()) {
3343 DestVal = ResultVals[ValueCount].first;
3344 DestValNo = ResultVals[ValueCount].second;
3346 DestVal = CI.getOperand(ValueCount-ResultVals.size()+1);
3348 if (I->isEarlyClobber)
3351 Out << "\"=" << C << "\"(" << GetValueName(DestVal);
3352 if (DestValNo != -1)
3353 Out << ".field" << DestValNo; // Multiple retvals.
3359 // Convert over all the input constraints.
3363 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3364 E = Constraints.end(); I != E; ++I) {
3365 if (I->Type != InlineAsm::isInput) {
3367 continue; // Ignore non-input constraints.
3370 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3371 std::string C = InterpretASMConstraint(*I);
3372 if (C.empty()) continue;
3379 assert(ValueCount >= ResultVals.size() && "Input can't refer to result");
3380 Value *SrcVal = CI.getOperand(ValueCount-ResultVals.size()+1);
3382 Out << "\"" << C << "\"(";
3384 writeOperand(SrcVal);
3386 writeOperandDeref(SrcVal);
3390 // Convert over the clobber constraints.
3393 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3394 E = Constraints.end(); I != E; ++I) {
3395 if (I->Type != InlineAsm::isClobber)
3396 continue; // Ignore non-input constraints.
3398 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3399 std::string C = InterpretASMConstraint(*I);
3400 if (C.empty()) continue;
3407 Out << '\"' << C << '"';
3413 void CWriter::visitAllocaInst(AllocaInst &I) {
3415 printType(Out, I.getType());
3416 Out << ") alloca(sizeof(";
3417 printType(Out, I.getType()->getElementType());
3419 if (I.isArrayAllocation()) {
3421 writeOperand(I.getOperand(0));
3426 void CWriter::printGEPExpression(Value *Ptr, gep_type_iterator I,
3427 gep_type_iterator E, bool Static) {
3429 // If there are no indices, just print out the pointer.
3435 // Find out if the last index is into a vector. If so, we have to print this
3436 // specially. Since vectors can't have elements of indexable type, only the
3437 // last index could possibly be of a vector element.
3438 const VectorType *LastIndexIsVector = 0;
3440 for (gep_type_iterator TmpI = I; TmpI != E; ++TmpI)
3441 LastIndexIsVector = dyn_cast<VectorType>(*TmpI);
3446 // If the last index is into a vector, we can't print it as &a[i][j] because
3447 // we can't index into a vector with j in GCC. Instead, emit this as
3448 // (((float*)&a[i])+j)
3449 if (LastIndexIsVector) {
3451 printType(Out, PointerType::getUnqual(LastIndexIsVector->getElementType()));
3457 // If the first index is 0 (very typical) we can do a number of
3458 // simplifications to clean up the code.
3459 Value *FirstOp = I.getOperand();
3460 if (!isa<Constant>(FirstOp) || !cast<Constant>(FirstOp)->isNullValue()) {
3461 // First index isn't simple, print it the hard way.
3464 ++I; // Skip the zero index.
3466 // Okay, emit the first operand. If Ptr is something that is already address
3467 // exposed, like a global, avoid emitting (&foo)[0], just emit foo instead.
3468 if (isAddressExposed(Ptr)) {
3469 writeOperandInternal(Ptr, Static);
3470 } else if (I != E && isa<StructType>(*I)) {
3471 // If we didn't already emit the first operand, see if we can print it as
3472 // P->f instead of "P[0].f"
3474 Out << "->field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3475 ++I; // eat the struct index as well.
3477 // Instead of emitting P[0][1], emit (*P)[1], which is more idiomatic.
3484 for (; I != E; ++I) {
3485 if (isa<StructType>(*I)) {
3486 Out << ".field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3487 } else if (isa<ArrayType>(*I)) {
3489 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3491 } else if (!isa<VectorType>(*I)) {
3493 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3496 // If the last index is into a vector, then print it out as "+j)". This
3497 // works with the 'LastIndexIsVector' code above.
3498 if (isa<Constant>(I.getOperand()) &&
3499 cast<Constant>(I.getOperand())->isNullValue()) {
3500 Out << "))"; // avoid "+0".
3503 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3511 void CWriter::writeMemoryAccess(Value *Operand, const Type *OperandType,
3512 bool IsVolatile, unsigned Alignment) {
3514 bool IsUnaligned = Alignment &&
3515 Alignment < TD->getABITypeAlignment(OperandType);
3519 if (IsVolatile || IsUnaligned) {
3522 Out << "struct __attribute__ ((packed, aligned(" << Alignment << "))) {";
3523 printType(Out, OperandType, false, IsUnaligned ? "data" : "volatile*");
3526 if (IsVolatile) Out << "volatile ";
3532 writeOperand(Operand);
3534 if (IsVolatile || IsUnaligned) {
3541 void CWriter::visitLoadInst(LoadInst &I) {
3542 writeMemoryAccess(I.getOperand(0), I.getType(), I.isVolatile(),
3547 void CWriter::visitStoreInst(StoreInst &I) {
3548 writeMemoryAccess(I.getPointerOperand(), I.getOperand(0)->getType(),
3549 I.isVolatile(), I.getAlignment());
3551 Value *Operand = I.getOperand(0);
3552 Constant *BitMask = 0;
3553 if (const IntegerType* ITy = dyn_cast<IntegerType>(Operand->getType()))
3554 if (!ITy->isPowerOf2ByteWidth())
3555 // We have a bit width that doesn't match an even power-of-2 byte
3556 // size. Consequently we must & the value with the type's bit mask
3557 BitMask = ConstantInt::get(ITy, ITy->getBitMask());
3560 writeOperand(Operand);
3563 printConstant(BitMask, false);
3568 void CWriter::visitGetElementPtrInst(GetElementPtrInst &I) {
3569 printGEPExpression(I.getPointerOperand(), gep_type_begin(I),
3570 gep_type_end(I), false);
3573 void CWriter::visitVAArgInst(VAArgInst &I) {
3574 Out << "va_arg(*(va_list*)";
3575 writeOperand(I.getOperand(0));
3577 printType(Out, I.getType());
3581 void CWriter::visitInsertElementInst(InsertElementInst &I) {
3582 const Type *EltTy = I.getType()->getElementType();
3583 writeOperand(I.getOperand(0));
3586 printType(Out, PointerType::getUnqual(EltTy));
3587 Out << ")(&" << GetValueName(&I) << "))[";
3588 writeOperand(I.getOperand(2));
3590 writeOperand(I.getOperand(1));
3594 void CWriter::visitExtractElementInst(ExtractElementInst &I) {
3595 // We know that our operand is not inlined.
3598 cast<VectorType>(I.getOperand(0)->getType())->getElementType();
3599 printType(Out, PointerType::getUnqual(EltTy));
3600 Out << ")(&" << GetValueName(I.getOperand(0)) << "))[";
3601 writeOperand(I.getOperand(1));
3605 void CWriter::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
3607 printType(Out, SVI.getType());
3609 const VectorType *VT = SVI.getType();
3610 unsigned NumElts = VT->getNumElements();
3611 const Type *EltTy = VT->getElementType();
3613 for (unsigned i = 0; i != NumElts; ++i) {
3615 int SrcVal = SVI.getMaskValue(i);
3616 if ((unsigned)SrcVal >= NumElts*2) {
3617 Out << " 0/*undef*/ ";
3619 Value *Op = SVI.getOperand((unsigned)SrcVal >= NumElts);
3620 if (isa<Instruction>(Op)) {
3621 // Do an extractelement of this value from the appropriate input.
3623 printType(Out, PointerType::getUnqual(EltTy));
3624 Out << ")(&" << GetValueName(Op)
3625 << "))[" << (SrcVal & (NumElts-1)) << "]";
3626 } else if (isa<ConstantAggregateZero>(Op) || isa<UndefValue>(Op)) {
3629 printConstant(cast<ConstantVector>(Op)->getOperand(SrcVal &
3638 void CWriter::visitInsertValueInst(InsertValueInst &IVI) {
3639 // Start by copying the entire aggregate value into the result variable.
3640 writeOperand(IVI.getOperand(0));
3643 // Then do the insert to update the field.
3644 Out << GetValueName(&IVI);
3645 for (const unsigned *b = IVI.idx_begin(), *i = b, *e = IVI.idx_end();
3647 const Type *IndexedTy =
3648 ExtractValueInst::getIndexedType(IVI.getOperand(0)->getType(), b, i+1);
3649 if (isa<ArrayType>(IndexedTy))
3650 Out << ".array[" << *i << "]";
3652 Out << ".field" << *i;
3655 writeOperand(IVI.getOperand(1));
3658 void CWriter::visitExtractValueInst(ExtractValueInst &EVI) {
3660 if (isa<UndefValue>(EVI.getOperand(0))) {
3662 printType(Out, EVI.getType());
3663 Out << ") 0/*UNDEF*/";
3665 Out << GetValueName(EVI.getOperand(0));
3666 for (const unsigned *b = EVI.idx_begin(), *i = b, *e = EVI.idx_end();
3668 const Type *IndexedTy =
3669 ExtractValueInst::getIndexedType(EVI.getOperand(0)->getType(), b, i+1);
3670 if (isa<ArrayType>(IndexedTy))
3671 Out << ".array[" << *i << "]";
3673 Out << ".field" << *i;
3679 //===----------------------------------------------------------------------===//
3680 // External Interface declaration
3681 //===----------------------------------------------------------------------===//
3683 bool CTargetMachine::addPassesToEmitWholeFile(PassManager &PM,
3684 formatted_raw_ostream &o,
3685 CodeGenFileType FileType,
3686 CodeGenOpt::Level OptLevel) {
3687 if (FileType != TargetMachine::AssemblyFile) return true;
3689 PM.add(createGCLoweringPass());
3690 PM.add(createLowerInvokePass());
3691 PM.add(createCFGSimplificationPass()); // clean up after lower invoke.
3692 PM.add(new CBackendNameAllUsedStructsAndMergeFunctions());
3693 PM.add(new CWriter(o));
3694 PM.add(createGCInfoDeleter());