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/Target/TargetAsmInfo.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 TargetAsmInfo* 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::VoidTy || !I.hasOneUse() ||
240 isa<TerminatorInst>(I) || isa<CallInst>(I) || isa<PHINode>(I) ||
241 isa<LoadInst>(I) || isa<VAArgInst>(I) || isa<InsertElementInst>(I) ||
242 isa<InsertValueInst>(I))
243 // Don't inline a load across a store or other bad things!
246 // Must not be used in inline asm, extractelement, or shufflevector.
248 const Instruction &User = cast<Instruction>(*I.use_back());
249 if (isInlineAsm(User) || isa<ExtractElementInst>(User) ||
250 isa<ShuffleVectorInst>(User))
254 // Only inline instruction it if it's use is in the same BB as the inst.
255 return I.getParent() == cast<Instruction>(I.use_back())->getParent();
258 // isDirectAlloca - Define fixed sized allocas in the entry block as direct
259 // variables which are accessed with the & operator. This causes GCC to
260 // generate significantly better code than to emit alloca calls directly.
262 static const AllocaInst *isDirectAlloca(const Value *V) {
263 const AllocaInst *AI = dyn_cast<AllocaInst>(V);
264 if (!AI) return false;
265 if (AI->isArrayAllocation())
266 return 0; // FIXME: we can also inline fixed size array allocas!
267 if (AI->getParent() != &AI->getParent()->getParent()->getEntryBlock())
272 // isInlineAsm - Check if the instruction is a call to an inline asm chunk
273 static bool isInlineAsm(const Instruction& I) {
274 if (isa<CallInst>(&I) && isa<InlineAsm>(I.getOperand(0)))
279 // Instruction visitation functions
280 friend class InstVisitor<CWriter>;
282 void visitReturnInst(ReturnInst &I);
283 void visitBranchInst(BranchInst &I);
284 void visitSwitchInst(SwitchInst &I);
285 void visitInvokeInst(InvokeInst &I) {
286 llvm_unreachable("Lowerinvoke pass didn't work!");
289 void visitUnwindInst(UnwindInst &I) {
290 llvm_unreachable("Lowerinvoke pass didn't work!");
292 void visitUnreachableInst(UnreachableInst &I);
294 void visitPHINode(PHINode &I);
295 void visitBinaryOperator(Instruction &I);
296 void visitICmpInst(ICmpInst &I);
297 void visitFCmpInst(FCmpInst &I);
299 void visitCastInst (CastInst &I);
300 void visitSelectInst(SelectInst &I);
301 void visitCallInst (CallInst &I);
302 void visitInlineAsm(CallInst &I);
303 bool visitBuiltinCall(CallInst &I, Intrinsic::ID ID, bool &WroteCallee);
305 void visitMallocInst(MallocInst &I);
306 void visitAllocaInst(AllocaInst &I);
307 void visitFreeInst (FreeInst &I);
308 void visitLoadInst (LoadInst &I);
309 void visitStoreInst (StoreInst &I);
310 void visitGetElementPtrInst(GetElementPtrInst &I);
311 void visitVAArgInst (VAArgInst &I);
313 void visitInsertElementInst(InsertElementInst &I);
314 void visitExtractElementInst(ExtractElementInst &I);
315 void visitShuffleVectorInst(ShuffleVectorInst &SVI);
317 void visitInsertValueInst(InsertValueInst &I);
318 void visitExtractValueInst(ExtractValueInst &I);
320 void visitInstruction(Instruction &I) {
322 cerr << "C Writer does not know about " << I;
327 void outputLValue(Instruction *I) {
328 Out << " " << GetValueName(I) << " = ";
331 bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To);
332 void printPHICopiesForSuccessor(BasicBlock *CurBlock,
333 BasicBlock *Successor, unsigned Indent);
334 void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
336 void printGEPExpression(Value *Ptr, gep_type_iterator I,
337 gep_type_iterator E, bool Static);
339 std::string GetValueName(const Value *Operand);
343 char CWriter::ID = 0;
345 /// This method inserts names for any unnamed structure types that are used by
346 /// the program, and removes names from structure types that are not used by the
349 bool CBackendNameAllUsedStructsAndMergeFunctions::runOnModule(Module &M) {
350 // Get a set of types that are used by the program...
351 std::set<const Type *> UT = getAnalysis<FindUsedTypes>().getTypes();
353 // Loop over the module symbol table, removing types from UT that are
354 // already named, and removing names for types that are not used.
356 TypeSymbolTable &TST = M.getTypeSymbolTable();
357 for (TypeSymbolTable::iterator TI = TST.begin(), TE = TST.end();
359 TypeSymbolTable::iterator I = TI++;
361 // If this isn't a struct or array type, remove it from our set of types
362 // to name. This simplifies emission later.
363 if (!isa<StructType>(I->second) && !isa<OpaqueType>(I->second) &&
364 !isa<ArrayType>(I->second)) {
367 // If this is not used, remove it from the symbol table.
368 std::set<const Type *>::iterator UTI = UT.find(I->second);
372 UT.erase(UTI); // Only keep one name for this type.
376 // UT now contains types that are not named. Loop over it, naming
379 bool Changed = false;
380 unsigned RenameCounter = 0;
381 for (std::set<const Type *>::const_iterator I = UT.begin(), E = UT.end();
383 if (isa<StructType>(*I) || isa<ArrayType>(*I)) {
384 while (M.addTypeName("unnamed"+utostr(RenameCounter), *I))
390 // Loop over all external functions and globals. If we have two with
391 // identical names, merge them.
392 // FIXME: This code should disappear when we don't allow values with the same
393 // names when they have different types!
394 std::map<std::string, GlobalValue*> ExtSymbols;
395 for (Module::iterator I = M.begin(), E = M.end(); I != E;) {
397 if (GV->isDeclaration() && GV->hasName()) {
398 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
399 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
401 // Found a conflict, replace this global with the previous one.
402 GlobalValue *OldGV = X.first->second;
403 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
404 GV->eraseFromParent();
409 // Do the same for globals.
410 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
412 GlobalVariable *GV = I++;
413 if (GV->isDeclaration() && GV->hasName()) {
414 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
415 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
417 // Found a conflict, replace this global with the previous one.
418 GlobalValue *OldGV = X.first->second;
419 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
420 GV->eraseFromParent();
429 /// printStructReturnPointerFunctionType - This is like printType for a struct
430 /// return type, except, instead of printing the type as void (*)(Struct*, ...)
431 /// print it as "Struct (*)(...)", for struct return functions.
432 void CWriter::printStructReturnPointerFunctionType(formatted_raw_ostream &Out,
433 const AttrListPtr &PAL,
434 const PointerType *TheTy) {
435 const FunctionType *FTy = cast<FunctionType>(TheTy->getElementType());
436 std::stringstream FunctionInnards;
437 FunctionInnards << " (*) (";
438 bool PrintedType = false;
440 FunctionType::param_iterator I = FTy->param_begin(), E = FTy->param_end();
441 const Type *RetTy = cast<PointerType>(I->get())->getElementType();
443 for (++I, ++Idx; I != E; ++I, ++Idx) {
445 FunctionInnards << ", ";
446 const Type *ArgTy = *I;
447 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
448 assert(isa<PointerType>(ArgTy));
449 ArgTy = cast<PointerType>(ArgTy)->getElementType();
451 printType(FunctionInnards, ArgTy,
452 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
455 if (FTy->isVarArg()) {
457 FunctionInnards << ", ...";
458 } else if (!PrintedType) {
459 FunctionInnards << "void";
461 FunctionInnards << ')';
462 std::string tstr = FunctionInnards.str();
463 printType(Out, RetTy,
464 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
468 CWriter::printSimpleType(formatted_raw_ostream &Out, const Type *Ty,
470 const std::string &NameSoFar) {
471 assert((Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) &&
472 "Invalid type for printSimpleType");
473 switch (Ty->getTypeID()) {
474 case Type::VoidTyID: return Out << "void " << NameSoFar;
475 case Type::IntegerTyID: {
476 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
478 return Out << "bool " << NameSoFar;
479 else if (NumBits <= 8)
480 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
481 else if (NumBits <= 16)
482 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
483 else if (NumBits <= 32)
484 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
485 else if (NumBits <= 64)
486 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
488 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
489 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
492 case Type::FloatTyID: return Out << "float " << NameSoFar;
493 case Type::DoubleTyID: return Out << "double " << NameSoFar;
494 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
495 // present matches host 'long double'.
496 case Type::X86_FP80TyID:
497 case Type::PPC_FP128TyID:
498 case Type::FP128TyID: return Out << "long double " << NameSoFar;
500 case Type::VectorTyID: {
501 const VectorType *VTy = cast<VectorType>(Ty);
502 return printSimpleType(Out, VTy->getElementType(), isSigned,
503 " __attribute__((vector_size(" +
504 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
509 cerr << "Unknown primitive type: " << *Ty << "\n";
516 CWriter::printSimpleType(std::ostream &Out, const Type *Ty, bool isSigned,
517 const std::string &NameSoFar) {
518 assert((Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) &&
519 "Invalid type for printSimpleType");
520 switch (Ty->getTypeID()) {
521 case Type::VoidTyID: return Out << "void " << NameSoFar;
522 case Type::IntegerTyID: {
523 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
525 return Out << "bool " << NameSoFar;
526 else if (NumBits <= 8)
527 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
528 else if (NumBits <= 16)
529 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
530 else if (NumBits <= 32)
531 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
532 else if (NumBits <= 64)
533 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
535 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
536 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
539 case Type::FloatTyID: return Out << "float " << NameSoFar;
540 case Type::DoubleTyID: return Out << "double " << NameSoFar;
541 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
542 // present matches host 'long double'.
543 case Type::X86_FP80TyID:
544 case Type::PPC_FP128TyID:
545 case Type::FP128TyID: return Out << "long double " << NameSoFar;
547 case Type::VectorTyID: {
548 const VectorType *VTy = cast<VectorType>(Ty);
549 return printSimpleType(Out, VTy->getElementType(), isSigned,
550 " __attribute__((vector_size(" +
551 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
556 cerr << "Unknown primitive type: " << *Ty << "\n";
562 // Pass the Type* and the variable name and this prints out the variable
565 raw_ostream &CWriter::printType(formatted_raw_ostream &Out,
567 bool isSigned, const std::string &NameSoFar,
568 bool IgnoreName, const AttrListPtr &PAL) {
569 if (Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) {
570 printSimpleType(Out, Ty, isSigned, NameSoFar);
574 // Check to see if the type is named.
575 if (!IgnoreName || isa<OpaqueType>(Ty)) {
576 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
577 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
580 switch (Ty->getTypeID()) {
581 case Type::FunctionTyID: {
582 const FunctionType *FTy = cast<FunctionType>(Ty);
583 std::stringstream FunctionInnards;
584 FunctionInnards << " (" << NameSoFar << ") (";
586 for (FunctionType::param_iterator I = FTy->param_begin(),
587 E = FTy->param_end(); I != E; ++I) {
588 const Type *ArgTy = *I;
589 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
590 assert(isa<PointerType>(ArgTy));
591 ArgTy = cast<PointerType>(ArgTy)->getElementType();
593 if (I != FTy->param_begin())
594 FunctionInnards << ", ";
595 printType(FunctionInnards, ArgTy,
596 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
599 if (FTy->isVarArg()) {
600 if (FTy->getNumParams())
601 FunctionInnards << ", ...";
602 } else if (!FTy->getNumParams()) {
603 FunctionInnards << "void";
605 FunctionInnards << ')';
606 std::string tstr = FunctionInnards.str();
607 printType(Out, FTy->getReturnType(),
608 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
611 case Type::StructTyID: {
612 const StructType *STy = cast<StructType>(Ty);
613 Out << NameSoFar + " {\n";
615 for (StructType::element_iterator I = STy->element_begin(),
616 E = STy->element_end(); I != E; ++I) {
618 printType(Out, *I, false, "field" + utostr(Idx++));
623 Out << " __attribute__ ((packed))";
627 case Type::PointerTyID: {
628 const PointerType *PTy = cast<PointerType>(Ty);
629 std::string ptrName = "*" + NameSoFar;
631 if (isa<ArrayType>(PTy->getElementType()) ||
632 isa<VectorType>(PTy->getElementType()))
633 ptrName = "(" + ptrName + ")";
636 // Must be a function ptr cast!
637 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
638 return printType(Out, PTy->getElementType(), false, ptrName);
641 case Type::ArrayTyID: {
642 const ArrayType *ATy = cast<ArrayType>(Ty);
643 unsigned NumElements = ATy->getNumElements();
644 if (NumElements == 0) NumElements = 1;
645 // Arrays are wrapped in structs to allow them to have normal
646 // value semantics (avoiding the array "decay").
647 Out << NameSoFar << " { ";
648 printType(Out, ATy->getElementType(), false,
649 "array[" + utostr(NumElements) + "]");
653 case Type::OpaqueTyID: {
654 std::string TyName = "struct opaque_" + itostr(OpaqueCounter++);
655 assert(TypeNames.find(Ty) == TypeNames.end());
656 TypeNames[Ty] = TyName;
657 return Out << TyName << ' ' << NameSoFar;
660 llvm_unreachable("Unhandled case in getTypeProps!");
666 // Pass the Type* and the variable name and this prints out the variable
669 std::ostream &CWriter::printType(std::ostream &Out, const Type *Ty,
670 bool isSigned, const std::string &NameSoFar,
671 bool IgnoreName, const AttrListPtr &PAL) {
672 if (Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) {
673 printSimpleType(Out, Ty, isSigned, NameSoFar);
677 // Check to see if the type is named.
678 if (!IgnoreName || isa<OpaqueType>(Ty)) {
679 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
680 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
683 switch (Ty->getTypeID()) {
684 case Type::FunctionTyID: {
685 const FunctionType *FTy = cast<FunctionType>(Ty);
686 std::stringstream FunctionInnards;
687 FunctionInnards << " (" << NameSoFar << ") (";
689 for (FunctionType::param_iterator I = FTy->param_begin(),
690 E = FTy->param_end(); I != E; ++I) {
691 const Type *ArgTy = *I;
692 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
693 assert(isa<PointerType>(ArgTy));
694 ArgTy = cast<PointerType>(ArgTy)->getElementType();
696 if (I != FTy->param_begin())
697 FunctionInnards << ", ";
698 printType(FunctionInnards, ArgTy,
699 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
702 if (FTy->isVarArg()) {
703 if (FTy->getNumParams())
704 FunctionInnards << ", ...";
705 } else if (!FTy->getNumParams()) {
706 FunctionInnards << "void";
708 FunctionInnards << ')';
709 std::string tstr = FunctionInnards.str();
710 printType(Out, FTy->getReturnType(),
711 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
714 case Type::StructTyID: {
715 const StructType *STy = cast<StructType>(Ty);
716 Out << NameSoFar + " {\n";
718 for (StructType::element_iterator I = STy->element_begin(),
719 E = STy->element_end(); I != E; ++I) {
721 printType(Out, *I, false, "field" + utostr(Idx++));
726 Out << " __attribute__ ((packed))";
730 case Type::PointerTyID: {
731 const PointerType *PTy = cast<PointerType>(Ty);
732 std::string ptrName = "*" + NameSoFar;
734 if (isa<ArrayType>(PTy->getElementType()) ||
735 isa<VectorType>(PTy->getElementType()))
736 ptrName = "(" + ptrName + ")";
739 // Must be a function ptr cast!
740 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
741 return printType(Out, PTy->getElementType(), false, ptrName);
744 case Type::ArrayTyID: {
745 const ArrayType *ATy = cast<ArrayType>(Ty);
746 unsigned NumElements = ATy->getNumElements();
747 if (NumElements == 0) NumElements = 1;
748 // Arrays are wrapped in structs to allow them to have normal
749 // value semantics (avoiding the array "decay").
750 Out << NameSoFar << " { ";
751 printType(Out, ATy->getElementType(), false,
752 "array[" + utostr(NumElements) + "]");
756 case Type::OpaqueTyID: {
757 std::string TyName = "struct opaque_" + itostr(OpaqueCounter++);
758 assert(TypeNames.find(Ty) == TypeNames.end());
759 TypeNames[Ty] = TyName;
760 return Out << TyName << ' ' << NameSoFar;
763 llvm_unreachable("Unhandled case in getTypeProps!");
769 void CWriter::printConstantArray(ConstantArray *CPA, bool Static) {
771 // As a special case, print the array as a string if it is an array of
772 // ubytes or an array of sbytes with positive values.
774 const Type *ETy = CPA->getType()->getElementType();
775 bool isString = (ETy == Type::Int8Ty || ETy == Type::Int8Ty);
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::FloatTy && CFP->getType() != Type::DoubleTy)
863 APFloat APF = APFloat(CFP->getValueAPF()); // copy
864 if (CFP->getType() == Type::FloatTy)
865 APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &ignored);
866 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
868 sprintf(Buffer, "%a", APF.convertToDouble());
869 if (!strncmp(Buffer, "0x", 2) ||
870 !strncmp(Buffer, "-0x", 3) ||
871 !strncmp(Buffer, "+0x", 3))
872 return APF.bitwiseIsEqual(APFloat(atof(Buffer)));
875 std::string StrVal = ftostr(APF);
877 while (StrVal[0] == ' ')
878 StrVal.erase(StrVal.begin());
880 // Check to make sure that the stringized number is not some string like "Inf"
881 // or NaN. Check that the string matches the "[-+]?[0-9]" regex.
882 if ((StrVal[0] >= '0' && StrVal[0] <= '9') ||
883 ((StrVal[0] == '-' || StrVal[0] == '+') &&
884 (StrVal[1] >= '0' && StrVal[1] <= '9')))
885 // Reparse stringized version!
886 return APF.bitwiseIsEqual(APFloat(atof(StrVal.c_str())));
891 /// Print out the casting for a cast operation. This does the double casting
892 /// necessary for conversion to the destination type, if necessary.
893 /// @brief Print a cast
894 void CWriter::printCast(unsigned opc, const Type *SrcTy, const Type *DstTy) {
895 // Print the destination type cast
897 case Instruction::UIToFP:
898 case Instruction::SIToFP:
899 case Instruction::IntToPtr:
900 case Instruction::Trunc:
901 case Instruction::BitCast:
902 case Instruction::FPExt:
903 case Instruction::FPTrunc: // For these the DstTy sign doesn't matter
905 printType(Out, DstTy);
908 case Instruction::ZExt:
909 case Instruction::PtrToInt:
910 case Instruction::FPToUI: // For these, make sure we get an unsigned dest
912 printSimpleType(Out, DstTy, false);
915 case Instruction::SExt:
916 case Instruction::FPToSI: // For these, make sure we get a signed dest
918 printSimpleType(Out, DstTy, true);
922 llvm_unreachable("Invalid cast opcode");
925 // Print the source type cast
927 case Instruction::UIToFP:
928 case Instruction::ZExt:
930 printSimpleType(Out, SrcTy, false);
933 case Instruction::SIToFP:
934 case Instruction::SExt:
936 printSimpleType(Out, SrcTy, true);
939 case Instruction::IntToPtr:
940 case Instruction::PtrToInt:
941 // Avoid "cast to pointer from integer of different size" warnings
942 Out << "(unsigned long)";
944 case Instruction::Trunc:
945 case Instruction::BitCast:
946 case Instruction::FPExt:
947 case Instruction::FPTrunc:
948 case Instruction::FPToSI:
949 case Instruction::FPToUI:
950 break; // These don't need a source cast.
952 llvm_unreachable("Invalid cast opcode");
957 // printConstant - The LLVM Constant to C Constant converter.
958 void CWriter::printConstant(Constant *CPV, bool Static) {
959 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
960 switch (CE->getOpcode()) {
961 case Instruction::Trunc:
962 case Instruction::ZExt:
963 case Instruction::SExt:
964 case Instruction::FPTrunc:
965 case Instruction::FPExt:
966 case Instruction::UIToFP:
967 case Instruction::SIToFP:
968 case Instruction::FPToUI:
969 case Instruction::FPToSI:
970 case Instruction::PtrToInt:
971 case Instruction::IntToPtr:
972 case Instruction::BitCast:
974 printCast(CE->getOpcode(), CE->getOperand(0)->getType(), CE->getType());
975 if (CE->getOpcode() == Instruction::SExt &&
976 CE->getOperand(0)->getType() == Type::Int1Ty) {
977 // Make sure we really sext from bool here by subtracting from 0
980 printConstant(CE->getOperand(0), Static);
981 if (CE->getType() == Type::Int1Ty &&
982 (CE->getOpcode() == Instruction::Trunc ||
983 CE->getOpcode() == Instruction::FPToUI ||
984 CE->getOpcode() == Instruction::FPToSI ||
985 CE->getOpcode() == Instruction::PtrToInt)) {
986 // Make sure we really truncate to bool here by anding with 1
992 case Instruction::GetElementPtr:
994 printGEPExpression(CE->getOperand(0), gep_type_begin(CPV),
995 gep_type_end(CPV), Static);
998 case Instruction::Select:
1000 printConstant(CE->getOperand(0), Static);
1002 printConstant(CE->getOperand(1), Static);
1004 printConstant(CE->getOperand(2), Static);
1007 case Instruction::Add:
1008 case Instruction::FAdd:
1009 case Instruction::Sub:
1010 case Instruction::FSub:
1011 case Instruction::Mul:
1012 case Instruction::FMul:
1013 case Instruction::SDiv:
1014 case Instruction::UDiv:
1015 case Instruction::FDiv:
1016 case Instruction::URem:
1017 case Instruction::SRem:
1018 case Instruction::FRem:
1019 case Instruction::And:
1020 case Instruction::Or:
1021 case Instruction::Xor:
1022 case Instruction::ICmp:
1023 case Instruction::Shl:
1024 case Instruction::LShr:
1025 case Instruction::AShr:
1028 bool NeedsClosingParens = printConstExprCast(CE, Static);
1029 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
1030 switch (CE->getOpcode()) {
1031 case Instruction::Add:
1032 case Instruction::FAdd: Out << " + "; break;
1033 case Instruction::Sub:
1034 case Instruction::FSub: Out << " - "; break;
1035 case Instruction::Mul:
1036 case Instruction::FMul: Out << " * "; break;
1037 case Instruction::URem:
1038 case Instruction::SRem:
1039 case Instruction::FRem: Out << " % "; break;
1040 case Instruction::UDiv:
1041 case Instruction::SDiv:
1042 case Instruction::FDiv: Out << " / "; break;
1043 case Instruction::And: Out << " & "; break;
1044 case Instruction::Or: Out << " | "; break;
1045 case Instruction::Xor: Out << " ^ "; break;
1046 case Instruction::Shl: Out << " << "; break;
1047 case Instruction::LShr:
1048 case Instruction::AShr: Out << " >> "; break;
1049 case Instruction::ICmp:
1050 switch (CE->getPredicate()) {
1051 case ICmpInst::ICMP_EQ: Out << " == "; break;
1052 case ICmpInst::ICMP_NE: Out << " != "; break;
1053 case ICmpInst::ICMP_SLT:
1054 case ICmpInst::ICMP_ULT: Out << " < "; break;
1055 case ICmpInst::ICMP_SLE:
1056 case ICmpInst::ICMP_ULE: Out << " <= "; break;
1057 case ICmpInst::ICMP_SGT:
1058 case ICmpInst::ICMP_UGT: Out << " > "; break;
1059 case ICmpInst::ICMP_SGE:
1060 case ICmpInst::ICMP_UGE: Out << " >= "; break;
1061 default: llvm_unreachable("Illegal ICmp predicate");
1064 default: llvm_unreachable("Illegal opcode here!");
1066 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
1067 if (NeedsClosingParens)
1072 case Instruction::FCmp: {
1074 bool NeedsClosingParens = printConstExprCast(CE, Static);
1075 if (CE->getPredicate() == FCmpInst::FCMP_FALSE)
1077 else if (CE->getPredicate() == FCmpInst::FCMP_TRUE)
1081 switch (CE->getPredicate()) {
1082 default: llvm_unreachable("Illegal FCmp predicate");
1083 case FCmpInst::FCMP_ORD: op = "ord"; break;
1084 case FCmpInst::FCMP_UNO: op = "uno"; break;
1085 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
1086 case FCmpInst::FCMP_UNE: op = "une"; break;
1087 case FCmpInst::FCMP_ULT: op = "ult"; break;
1088 case FCmpInst::FCMP_ULE: op = "ule"; break;
1089 case FCmpInst::FCMP_UGT: op = "ugt"; break;
1090 case FCmpInst::FCMP_UGE: op = "uge"; break;
1091 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
1092 case FCmpInst::FCMP_ONE: op = "one"; break;
1093 case FCmpInst::FCMP_OLT: op = "olt"; break;
1094 case FCmpInst::FCMP_OLE: op = "ole"; break;
1095 case FCmpInst::FCMP_OGT: op = "ogt"; break;
1096 case FCmpInst::FCMP_OGE: op = "oge"; break;
1098 Out << "llvm_fcmp_" << op << "(";
1099 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
1101 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
1104 if (NeedsClosingParens)
1111 cerr << "CWriter Error: Unhandled constant expression: "
1114 llvm_unreachable(0);
1116 } else if (isa<UndefValue>(CPV) && CPV->getType()->isSingleValueType()) {
1118 printType(Out, CPV->getType()); // sign doesn't matter
1119 Out << ")/*UNDEF*/";
1120 if (!isa<VectorType>(CPV->getType())) {
1128 if (ConstantInt *CI = dyn_cast<ConstantInt>(CPV)) {
1129 const Type* Ty = CI->getType();
1130 if (Ty == Type::Int1Ty)
1131 Out << (CI->getZExtValue() ? '1' : '0');
1132 else if (Ty == Type::Int32Ty)
1133 Out << CI->getZExtValue() << 'u';
1134 else if (Ty->getPrimitiveSizeInBits() > 32)
1135 Out << CI->getZExtValue() << "ull";
1138 printSimpleType(Out, Ty, false) << ')';
1139 if (CI->isMinValue(true))
1140 Out << CI->getZExtValue() << 'u';
1142 Out << CI->getSExtValue();
1148 switch (CPV->getType()->getTypeID()) {
1149 case Type::FloatTyID:
1150 case Type::DoubleTyID:
1151 case Type::X86_FP80TyID:
1152 case Type::PPC_FP128TyID:
1153 case Type::FP128TyID: {
1154 ConstantFP *FPC = cast<ConstantFP>(CPV);
1155 std::map<const ConstantFP*, unsigned>::iterator I = FPConstantMap.find(FPC);
1156 if (I != FPConstantMap.end()) {
1157 // Because of FP precision problems we must load from a stack allocated
1158 // value that holds the value in hex.
1159 Out << "(*(" << (FPC->getType() == Type::FloatTy ? "float" :
1160 FPC->getType() == Type::DoubleTy ? "double" :
1162 << "*)&FPConstant" << I->second << ')';
1165 if (FPC->getType() == Type::FloatTy)
1166 V = FPC->getValueAPF().convertToFloat();
1167 else if (FPC->getType() == Type::DoubleTy)
1168 V = FPC->getValueAPF().convertToDouble();
1170 // Long double. Convert the number to double, discarding precision.
1171 // This is not awesome, but it at least makes the CBE output somewhat
1173 APFloat Tmp = FPC->getValueAPF();
1175 Tmp.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &LosesInfo);
1176 V = Tmp.convertToDouble();
1182 // FIXME the actual NaN bits should be emitted.
1183 // The prefix for a quiet NaN is 0x7FF8. For a signalling NaN,
1185 const unsigned long QuietNaN = 0x7ff8UL;
1186 //const unsigned long SignalNaN = 0x7ff4UL;
1188 // We need to grab the first part of the FP #
1191 uint64_t ll = DoubleToBits(V);
1192 sprintf(Buffer, "0x%llx", static_cast<long long>(ll));
1194 std::string Num(&Buffer[0], &Buffer[6]);
1195 unsigned long Val = strtoul(Num.c_str(), 0, 16);
1197 if (FPC->getType() == Type::FloatTy)
1198 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "F(\""
1199 << Buffer << "\") /*nan*/ ";
1201 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "(\""
1202 << Buffer << "\") /*nan*/ ";
1203 } else if (IsInf(V)) {
1205 if (V < 0) Out << '-';
1206 Out << "LLVM_INF" << (FPC->getType() == Type::FloatTy ? "F" : "")
1210 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
1211 // Print out the constant as a floating point number.
1213 sprintf(Buffer, "%a", V);
1216 Num = ftostr(FPC->getValueAPF());
1224 case Type::ArrayTyID:
1225 // Use C99 compound expression literal initializer syntax.
1228 printType(Out, CPV->getType());
1231 Out << "{ "; // Arrays are wrapped in struct types.
1232 if (ConstantArray *CA = dyn_cast<ConstantArray>(CPV)) {
1233 printConstantArray(CA, Static);
1235 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1236 const ArrayType *AT = cast<ArrayType>(CPV->getType());
1238 if (AT->getNumElements()) {
1240 Constant *CZ = Constant::getNullValue(AT->getElementType());
1241 printConstant(CZ, Static);
1242 for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
1244 printConstant(CZ, Static);
1249 Out << " }"; // Arrays are wrapped in struct types.
1252 case Type::VectorTyID:
1253 // Use C99 compound expression literal initializer syntax.
1256 printType(Out, CPV->getType());
1259 if (ConstantVector *CV = dyn_cast<ConstantVector>(CPV)) {
1260 printConstantVector(CV, Static);
1262 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1263 const VectorType *VT = cast<VectorType>(CPV->getType());
1265 Constant *CZ = Constant::getNullValue(VT->getElementType());
1266 printConstant(CZ, Static);
1267 for (unsigned i = 1, e = VT->getNumElements(); i != e; ++i) {
1269 printConstant(CZ, Static);
1275 case Type::StructTyID:
1276 // Use C99 compound expression literal initializer syntax.
1279 printType(Out, CPV->getType());
1282 if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
1283 const StructType *ST = cast<StructType>(CPV->getType());
1285 if (ST->getNumElements()) {
1287 printConstant(Constant::getNullValue(ST->getElementType(0)), Static);
1288 for (unsigned i = 1, e = ST->getNumElements(); i != e; ++i) {
1290 printConstant(Constant::getNullValue(ST->getElementType(i)), Static);
1296 if (CPV->getNumOperands()) {
1298 printConstant(cast<Constant>(CPV->getOperand(0)), Static);
1299 for (unsigned i = 1, e = CPV->getNumOperands(); i != e; ++i) {
1301 printConstant(cast<Constant>(CPV->getOperand(i)), Static);
1308 case Type::PointerTyID:
1309 if (isa<ConstantPointerNull>(CPV)) {
1311 printType(Out, CPV->getType()); // sign doesn't matter
1312 Out << ")/*NULL*/0)";
1314 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(CPV)) {
1315 writeOperand(GV, Static);
1321 cerr << "Unknown constant type: " << *CPV << "\n";
1323 llvm_unreachable(0);
1327 // Some constant expressions need to be casted back to the original types
1328 // because their operands were casted to the expected type. This function takes
1329 // care of detecting that case and printing the cast for the ConstantExpr.
1330 bool CWriter::printConstExprCast(const ConstantExpr* CE, bool Static) {
1331 bool NeedsExplicitCast = false;
1332 const Type *Ty = CE->getOperand(0)->getType();
1333 bool TypeIsSigned = false;
1334 switch (CE->getOpcode()) {
1335 case Instruction::Add:
1336 case Instruction::Sub:
1337 case Instruction::Mul:
1338 // We need to cast integer arithmetic so that it is always performed
1339 // as unsigned, to avoid undefined behavior on overflow.
1340 case Instruction::LShr:
1341 case Instruction::URem:
1342 case Instruction::UDiv: NeedsExplicitCast = true; break;
1343 case Instruction::AShr:
1344 case Instruction::SRem:
1345 case Instruction::SDiv: NeedsExplicitCast = true; TypeIsSigned = true; break;
1346 case Instruction::SExt:
1348 NeedsExplicitCast = true;
1349 TypeIsSigned = true;
1351 case Instruction::ZExt:
1352 case Instruction::Trunc:
1353 case Instruction::FPTrunc:
1354 case Instruction::FPExt:
1355 case Instruction::UIToFP:
1356 case Instruction::SIToFP:
1357 case Instruction::FPToUI:
1358 case Instruction::FPToSI:
1359 case Instruction::PtrToInt:
1360 case Instruction::IntToPtr:
1361 case Instruction::BitCast:
1363 NeedsExplicitCast = true;
1367 if (NeedsExplicitCast) {
1369 if (Ty->isInteger() && Ty != Type::Int1Ty)
1370 printSimpleType(Out, Ty, TypeIsSigned);
1372 printType(Out, Ty); // not integer, sign doesn't matter
1375 return NeedsExplicitCast;
1378 // Print a constant assuming that it is the operand for a given Opcode. The
1379 // opcodes that care about sign need to cast their operands to the expected
1380 // type before the operation proceeds. This function does the casting.
1381 void CWriter::printConstantWithCast(Constant* CPV, unsigned Opcode) {
1383 // Extract the operand's type, we'll need it.
1384 const Type* OpTy = CPV->getType();
1386 // Indicate whether to do the cast or not.
1387 bool shouldCast = false;
1388 bool typeIsSigned = false;
1390 // Based on the Opcode for which this Constant is being written, determine
1391 // the new type to which the operand should be casted by setting the value
1392 // of OpTy. If we change OpTy, also set shouldCast to true so it gets
1396 // for most instructions, it doesn't matter
1398 case Instruction::Add:
1399 case Instruction::Sub:
1400 case Instruction::Mul:
1401 // We need to cast integer arithmetic so that it is always performed
1402 // as unsigned, to avoid undefined behavior on overflow.
1403 case Instruction::LShr:
1404 case Instruction::UDiv:
1405 case Instruction::URem:
1408 case Instruction::AShr:
1409 case Instruction::SDiv:
1410 case Instruction::SRem:
1412 typeIsSigned = true;
1416 // Write out the casted constant if we should, otherwise just write the
1420 printSimpleType(Out, OpTy, typeIsSigned);
1422 printConstant(CPV, false);
1425 printConstant(CPV, false);
1428 std::string CWriter::GetValueName(const Value *Operand) {
1429 // Mangle globals with the standard mangler interface for LLC compatibility.
1430 if (const GlobalValue *GV = dyn_cast<GlobalValue>(Operand))
1431 return Mang->getMangledName(GV);
1433 std::string Name = Operand->getName();
1435 if (Name.empty()) { // Assign unique names to local temporaries.
1436 unsigned &No = AnonValueNumbers[Operand];
1438 No = ++NextAnonValueNumber;
1439 Name = "tmp__" + utostr(No);
1442 std::string VarName;
1443 VarName.reserve(Name.capacity());
1445 for (std::string::iterator I = Name.begin(), E = Name.end();
1449 if (!((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
1450 (ch >= '0' && ch <= '9') || ch == '_')) {
1452 sprintf(buffer, "_%x_", ch);
1458 return "llvm_cbe_" + VarName;
1461 /// writeInstComputationInline - Emit the computation for the specified
1462 /// instruction inline, with no destination provided.
1463 void CWriter::writeInstComputationInline(Instruction &I) {
1464 // We can't currently support integer types other than 1, 8, 16, 32, 64.
1466 const Type *Ty = I.getType();
1467 if (Ty->isInteger() && (Ty!=Type::Int1Ty && Ty!=Type::Int8Ty &&
1468 Ty!=Type::Int16Ty && Ty!=Type::Int32Ty && Ty!=Type::Int64Ty)) {
1469 llvm_report_error("The C backend does not currently support integer "
1470 "types of widths other than 1, 8, 16, 32, 64.\n"
1471 "This is being tracked as PR 4158.");
1474 // If this is a non-trivial bool computation, make sure to truncate down to
1475 // a 1 bit value. This is important because we want "add i1 x, y" to return
1476 // "0" when x and y are true, not "2" for example.
1477 bool NeedBoolTrunc = false;
1478 if (I.getType() == Type::Int1Ty && !isa<ICmpInst>(I) && !isa<FCmpInst>(I))
1479 NeedBoolTrunc = true;
1491 void CWriter::writeOperandInternal(Value *Operand, bool Static) {
1492 if (Instruction *I = dyn_cast<Instruction>(Operand))
1493 // Should we inline this instruction to build a tree?
1494 if (isInlinableInst(*I) && !isDirectAlloca(I)) {
1496 writeInstComputationInline(*I);
1501 Constant* CPV = dyn_cast<Constant>(Operand);
1503 if (CPV && !isa<GlobalValue>(CPV))
1504 printConstant(CPV, Static);
1506 Out << GetValueName(Operand);
1509 void CWriter::writeOperand(Value *Operand, bool Static) {
1510 bool isAddressImplicit = isAddressExposed(Operand);
1511 if (isAddressImplicit)
1512 Out << "(&"; // Global variables are referenced as their addresses by llvm
1514 writeOperandInternal(Operand, Static);
1516 if (isAddressImplicit)
1520 // Some instructions need to have their result value casted back to the
1521 // original types because their operands were casted to the expected type.
1522 // This function takes care of detecting that case and printing the cast
1523 // for the Instruction.
1524 bool CWriter::writeInstructionCast(const Instruction &I) {
1525 const Type *Ty = I.getOperand(0)->getType();
1526 switch (I.getOpcode()) {
1527 case Instruction::Add:
1528 case Instruction::Sub:
1529 case Instruction::Mul:
1530 // We need to cast integer arithmetic so that it is always performed
1531 // as unsigned, to avoid undefined behavior on overflow.
1532 case Instruction::LShr:
1533 case Instruction::URem:
1534 case Instruction::UDiv:
1536 printSimpleType(Out, Ty, false);
1539 case Instruction::AShr:
1540 case Instruction::SRem:
1541 case Instruction::SDiv:
1543 printSimpleType(Out, Ty, true);
1551 // Write the operand with a cast to another type based on the Opcode being used.
1552 // This will be used in cases where an instruction has specific type
1553 // requirements (usually signedness) for its operands.
1554 void CWriter::writeOperandWithCast(Value* Operand, unsigned Opcode) {
1556 // Extract the operand's type, we'll need it.
1557 const Type* OpTy = Operand->getType();
1559 // Indicate whether to do the cast or not.
1560 bool shouldCast = false;
1562 // Indicate whether the cast should be to a signed type or not.
1563 bool castIsSigned = false;
1565 // Based on the Opcode for which this Operand is being written, determine
1566 // the new type to which the operand should be casted by setting the value
1567 // of OpTy. If we change OpTy, also set shouldCast to true.
1570 // for most instructions, it doesn't matter
1572 case Instruction::Add:
1573 case Instruction::Sub:
1574 case Instruction::Mul:
1575 // We need to cast integer arithmetic so that it is always performed
1576 // as unsigned, to avoid undefined behavior on overflow.
1577 case Instruction::LShr:
1578 case Instruction::UDiv:
1579 case Instruction::URem: // Cast to unsigned first
1581 castIsSigned = false;
1583 case Instruction::GetElementPtr:
1584 case Instruction::AShr:
1585 case Instruction::SDiv:
1586 case Instruction::SRem: // Cast to signed first
1588 castIsSigned = true;
1592 // Write out the casted operand if we should, otherwise just write the
1596 printSimpleType(Out, OpTy, castIsSigned);
1598 writeOperand(Operand);
1601 writeOperand(Operand);
1604 // Write the operand with a cast to another type based on the icmp predicate
1606 void CWriter::writeOperandWithCast(Value* Operand, const ICmpInst &Cmp) {
1607 // This has to do a cast to ensure the operand has the right signedness.
1608 // Also, if the operand is a pointer, we make sure to cast to an integer when
1609 // doing the comparison both for signedness and so that the C compiler doesn't
1610 // optimize things like "p < NULL" to false (p may contain an integer value
1612 bool shouldCast = Cmp.isRelational();
1614 // Write out the casted operand if we should, otherwise just write the
1617 writeOperand(Operand);
1621 // Should this be a signed comparison? If so, convert to signed.
1622 bool castIsSigned = Cmp.isSignedPredicate();
1624 // If the operand was a pointer, convert to a large integer type.
1625 const Type* OpTy = Operand->getType();
1626 if (isa<PointerType>(OpTy))
1627 OpTy = TD->getIntPtrType();
1630 printSimpleType(Out, OpTy, castIsSigned);
1632 writeOperand(Operand);
1636 // generateCompilerSpecificCode - This is where we add conditional compilation
1637 // directives to cater to specific compilers as need be.
1639 static void generateCompilerSpecificCode(formatted_raw_ostream& Out,
1640 const TargetData *TD) {
1641 // Alloca is hard to get, and we don't want to include stdlib.h here.
1642 Out << "/* get a declaration for alloca */\n"
1643 << "#if defined(__CYGWIN__) || defined(__MINGW32__)\n"
1644 << "#define alloca(x) __builtin_alloca((x))\n"
1645 << "#define _alloca(x) __builtin_alloca((x))\n"
1646 << "#elif defined(__APPLE__)\n"
1647 << "extern void *__builtin_alloca(unsigned long);\n"
1648 << "#define alloca(x) __builtin_alloca(x)\n"
1649 << "#define longjmp _longjmp\n"
1650 << "#define setjmp _setjmp\n"
1651 << "#elif defined(__sun__)\n"
1652 << "#if defined(__sparcv9)\n"
1653 << "extern void *__builtin_alloca(unsigned long);\n"
1655 << "extern void *__builtin_alloca(unsigned int);\n"
1657 << "#define alloca(x) __builtin_alloca(x)\n"
1658 << "#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__arm__)\n"
1659 << "#define alloca(x) __builtin_alloca(x)\n"
1660 << "#elif defined(_MSC_VER)\n"
1661 << "#define inline _inline\n"
1662 << "#define alloca(x) _alloca(x)\n"
1664 << "#include <alloca.h>\n"
1667 // We output GCC specific attributes to preserve 'linkonce'ness on globals.
1668 // If we aren't being compiled with GCC, just drop these attributes.
1669 Out << "#ifndef __GNUC__ /* Can only support \"linkonce\" vars with GCC */\n"
1670 << "#define __attribute__(X)\n"
1673 // On Mac OS X, "external weak" is spelled "__attribute__((weak_import))".
1674 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1675 << "#define __EXTERNAL_WEAK__ __attribute__((weak_import))\n"
1676 << "#elif defined(__GNUC__)\n"
1677 << "#define __EXTERNAL_WEAK__ __attribute__((weak))\n"
1679 << "#define __EXTERNAL_WEAK__\n"
1682 // For now, turn off the weak linkage attribute on Mac OS X. (See above.)
1683 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1684 << "#define __ATTRIBUTE_WEAK__\n"
1685 << "#elif defined(__GNUC__)\n"
1686 << "#define __ATTRIBUTE_WEAK__ __attribute__((weak))\n"
1688 << "#define __ATTRIBUTE_WEAK__\n"
1691 // Add hidden visibility support. FIXME: APPLE_CC?
1692 Out << "#if defined(__GNUC__)\n"
1693 << "#define __HIDDEN__ __attribute__((visibility(\"hidden\")))\n"
1696 // Define NaN and Inf as GCC builtins if using GCC, as 0 otherwise
1697 // From the GCC documentation:
1699 // double __builtin_nan (const char *str)
1701 // This is an implementation of the ISO C99 function nan.
1703 // Since ISO C99 defines this function in terms of strtod, which we do
1704 // not implement, a description of the parsing is in order. The string is
1705 // parsed as by strtol; that is, the base is recognized by leading 0 or
1706 // 0x prefixes. The number parsed is placed in the significand such that
1707 // the least significant bit of the number is at the least significant
1708 // bit of the significand. The number is truncated to fit the significand
1709 // field provided. The significand is forced to be a quiet NaN.
1711 // This function, if given a string literal, is evaluated early enough
1712 // that it is considered a compile-time constant.
1714 // float __builtin_nanf (const char *str)
1716 // Similar to __builtin_nan, except the return type is float.
1718 // double __builtin_inf (void)
1720 // Similar to __builtin_huge_val, except a warning is generated if the
1721 // target floating-point format does not support infinities. This
1722 // function is suitable for implementing the ISO C99 macro INFINITY.
1724 // float __builtin_inff (void)
1726 // Similar to __builtin_inf, except the return type is float.
1727 Out << "#ifdef __GNUC__\n"
1728 << "#define LLVM_NAN(NanStr) __builtin_nan(NanStr) /* Double */\n"
1729 << "#define LLVM_NANF(NanStr) __builtin_nanf(NanStr) /* Float */\n"
1730 << "#define LLVM_NANS(NanStr) __builtin_nans(NanStr) /* Double */\n"
1731 << "#define LLVM_NANSF(NanStr) __builtin_nansf(NanStr) /* Float */\n"
1732 << "#define LLVM_INF __builtin_inf() /* Double */\n"
1733 << "#define LLVM_INFF __builtin_inff() /* Float */\n"
1734 << "#define LLVM_PREFETCH(addr,rw,locality) "
1735 "__builtin_prefetch(addr,rw,locality)\n"
1736 << "#define __ATTRIBUTE_CTOR__ __attribute__((constructor))\n"
1737 << "#define __ATTRIBUTE_DTOR__ __attribute__((destructor))\n"
1738 << "#define LLVM_ASM __asm__\n"
1740 << "#define LLVM_NAN(NanStr) ((double)0.0) /* Double */\n"
1741 << "#define LLVM_NANF(NanStr) 0.0F /* Float */\n"
1742 << "#define LLVM_NANS(NanStr) ((double)0.0) /* Double */\n"
1743 << "#define LLVM_NANSF(NanStr) 0.0F /* Float */\n"
1744 << "#define LLVM_INF ((double)0.0) /* Double */\n"
1745 << "#define LLVM_INFF 0.0F /* Float */\n"
1746 << "#define LLVM_PREFETCH(addr,rw,locality) /* PREFETCH */\n"
1747 << "#define __ATTRIBUTE_CTOR__\n"
1748 << "#define __ATTRIBUTE_DTOR__\n"
1749 << "#define LLVM_ASM(X)\n"
1752 Out << "#if __GNUC__ < 4 /* Old GCC's, or compilers not GCC */ \n"
1753 << "#define __builtin_stack_save() 0 /* not implemented */\n"
1754 << "#define __builtin_stack_restore(X) /* noop */\n"
1757 // Output typedefs for 128-bit integers. If these are needed with a
1758 // 32-bit target or with a C compiler that doesn't support mode(TI),
1759 // more drastic measures will be needed.
1760 Out << "#if __GNUC__ && __LP64__ /* 128-bit integer types */\n"
1761 << "typedef int __attribute__((mode(TI))) llvmInt128;\n"
1762 << "typedef unsigned __attribute__((mode(TI))) llvmUInt128;\n"
1765 // Output target-specific code that should be inserted into main.
1766 Out << "#define CODE_FOR_MAIN() /* Any target-specific code for main()*/\n";
1769 /// FindStaticTors - Given a static ctor/dtor list, unpack its contents into
1770 /// the StaticTors set.
1771 static void FindStaticTors(GlobalVariable *GV, std::set<Function*> &StaticTors){
1772 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
1773 if (!InitList) return;
1775 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
1776 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
1777 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
1779 if (CS->getOperand(1)->isNullValue())
1780 return; // Found a null terminator, exit printing.
1781 Constant *FP = CS->getOperand(1);
1782 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
1784 FP = CE->getOperand(0);
1785 if (Function *F = dyn_cast<Function>(FP))
1786 StaticTors.insert(F);
1790 enum SpecialGlobalClass {
1792 GlobalCtors, GlobalDtors,
1796 /// getGlobalVariableClass - If this is a global that is specially recognized
1797 /// by LLVM, return a code that indicates how we should handle it.
1798 static SpecialGlobalClass getGlobalVariableClass(const GlobalVariable *GV) {
1799 // If this is a global ctors/dtors list, handle it now.
1800 if (GV->hasAppendingLinkage() && GV->use_empty()) {
1801 if (GV->getName() == "llvm.global_ctors")
1803 else if (GV->getName() == "llvm.global_dtors")
1807 // Otherwise, it it is other metadata, don't print it. This catches things
1808 // like debug information.
1809 if (GV->getSection() == "llvm.metadata")
1815 // PrintEscapedString - Print each character of the specified string, escaping
1816 // it if it is not printable or if it is an escape char.
1817 static void PrintEscapedString(const char *Str, unsigned Length,
1819 for (unsigned i = 0; i != Length; ++i) {
1820 unsigned char C = Str[i];
1821 if (isprint(C) && C != '\\' && C != '"')
1830 Out << "\\x" << hexdigit(C >> 4) << hexdigit(C & 0x0F);
1834 // PrintEscapedString - Print each character of the specified string, escaping
1835 // it if it is not printable or if it is an escape char.
1836 static void PrintEscapedString(const std::string &Str, raw_ostream &Out) {
1837 PrintEscapedString(Str.c_str(), Str.size(), Out);
1840 bool CWriter::doInitialization(Module &M) {
1841 FunctionPass::doInitialization(M);
1846 TD = new TargetData(&M);
1847 IL = new IntrinsicLowering(*TD);
1848 IL->AddPrototypes(M);
1850 // Ensure that all structure types have names...
1851 Mang = new Mangler(M);
1852 Mang->markCharUnacceptable('.');
1854 // Keep track of which functions are static ctors/dtors so they can have
1855 // an attribute added to their prototypes.
1856 std::set<Function*> StaticCtors, StaticDtors;
1857 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1859 switch (getGlobalVariableClass(I)) {
1862 FindStaticTors(I, StaticCtors);
1865 FindStaticTors(I, StaticDtors);
1870 // get declaration for alloca
1871 Out << "/* Provide Declarations */\n";
1872 Out << "#include <stdarg.h>\n"; // Varargs support
1873 Out << "#include <setjmp.h>\n"; // Unwind support
1874 generateCompilerSpecificCode(Out, TD);
1876 // Provide a definition for `bool' if not compiling with a C++ compiler.
1878 << "#ifndef __cplusplus\ntypedef unsigned char bool;\n#endif\n"
1880 << "\n\n/* Support for floating point constants */\n"
1881 << "typedef unsigned long long ConstantDoubleTy;\n"
1882 << "typedef unsigned int ConstantFloatTy;\n"
1883 << "typedef struct { unsigned long long f1; unsigned short f2; "
1884 "unsigned short pad[3]; } ConstantFP80Ty;\n"
1885 // This is used for both kinds of 128-bit long double; meaning differs.
1886 << "typedef struct { unsigned long long f1; unsigned long long f2; }"
1887 " ConstantFP128Ty;\n"
1888 << "\n\n/* Global Declarations */\n";
1890 // First output all the declarations for the program, because C requires
1891 // Functions & globals to be declared before they are used.
1893 if (!M.getModuleInlineAsm().empty()) {
1894 Out << "/* Module asm statements */\n"
1897 // Split the string into lines, to make it easier to read the .ll file.
1898 std::string Asm = M.getModuleInlineAsm();
1900 size_t NewLine = Asm.find_first_of('\n', CurPos);
1901 while (NewLine != std::string::npos) {
1902 // We found a newline, print the portion of the asm string from the
1903 // last newline up to this newline.
1905 PrintEscapedString(std::string(Asm.begin()+CurPos, Asm.begin()+NewLine),
1909 NewLine = Asm.find_first_of('\n', CurPos);
1912 PrintEscapedString(std::string(Asm.begin()+CurPos, Asm.end()), Out);
1914 << "/* End Module asm statements */\n";
1917 // Loop over the symbol table, emitting all named constants...
1918 printModuleTypes(M.getTypeSymbolTable());
1920 // Global variable declarations...
1921 if (!M.global_empty()) {
1922 Out << "\n/* External Global Variable Declarations */\n";
1923 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1926 if (I->hasExternalLinkage() || I->hasExternalWeakLinkage() ||
1927 I->hasCommonLinkage())
1929 else if (I->hasDLLImportLinkage())
1930 Out << "__declspec(dllimport) ";
1932 continue; // Internal Global
1934 // Thread Local Storage
1935 if (I->isThreadLocal())
1938 printType(Out, I->getType()->getElementType(), false, GetValueName(I));
1940 if (I->hasExternalWeakLinkage())
1941 Out << " __EXTERNAL_WEAK__";
1946 // Function declarations
1947 Out << "\n/* Function Declarations */\n";
1948 Out << "double fmod(double, double);\n"; // Support for FP rem
1949 Out << "float fmodf(float, float);\n";
1950 Out << "long double fmodl(long double, long double);\n";
1952 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
1953 // Don't print declarations for intrinsic functions.
1954 if (!I->isIntrinsic() && I->getName() != "setjmp" &&
1955 I->getName() != "longjmp" && I->getName() != "_setjmp") {
1956 if (I->hasExternalWeakLinkage())
1958 printFunctionSignature(I, true);
1959 if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
1960 Out << " __ATTRIBUTE_WEAK__";
1961 if (I->hasExternalWeakLinkage())
1962 Out << " __EXTERNAL_WEAK__";
1963 if (StaticCtors.count(I))
1964 Out << " __ATTRIBUTE_CTOR__";
1965 if (StaticDtors.count(I))
1966 Out << " __ATTRIBUTE_DTOR__";
1967 if (I->hasHiddenVisibility())
1968 Out << " __HIDDEN__";
1970 if (I->hasName() && I->getName()[0] == 1)
1971 Out << " LLVM_ASM(\"" << I->getName().substr(1) << "\")";
1977 // Output the global variable declarations
1978 if (!M.global_empty()) {
1979 Out << "\n\n/* Global Variable Declarations */\n";
1980 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1982 if (!I->isDeclaration()) {
1983 // Ignore special globals, such as debug info.
1984 if (getGlobalVariableClass(I))
1987 if (I->hasLocalLinkage())
1992 // Thread Local Storage
1993 if (I->isThreadLocal())
1996 printType(Out, I->getType()->getElementType(), false,
1999 if (I->hasLinkOnceLinkage())
2000 Out << " __attribute__((common))";
2001 else if (I->hasCommonLinkage()) // FIXME is this right?
2002 Out << " __ATTRIBUTE_WEAK__";
2003 else if (I->hasWeakLinkage())
2004 Out << " __ATTRIBUTE_WEAK__";
2005 else if (I->hasExternalWeakLinkage())
2006 Out << " __EXTERNAL_WEAK__";
2007 if (I->hasHiddenVisibility())
2008 Out << " __HIDDEN__";
2013 // Output the global variable definitions and contents...
2014 if (!M.global_empty()) {
2015 Out << "\n\n/* Global Variable Definitions and Initialization */\n";
2016 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
2018 if (!I->isDeclaration()) {
2019 // Ignore special globals, such as debug info.
2020 if (getGlobalVariableClass(I))
2023 if (I->hasLocalLinkage())
2025 else if (I->hasDLLImportLinkage())
2026 Out << "__declspec(dllimport) ";
2027 else if (I->hasDLLExportLinkage())
2028 Out << "__declspec(dllexport) ";
2030 // Thread Local Storage
2031 if (I->isThreadLocal())
2034 printType(Out, I->getType()->getElementType(), false,
2036 if (I->hasLinkOnceLinkage())
2037 Out << " __attribute__((common))";
2038 else if (I->hasWeakLinkage())
2039 Out << " __ATTRIBUTE_WEAK__";
2040 else if (I->hasCommonLinkage())
2041 Out << " __ATTRIBUTE_WEAK__";
2043 if (I->hasHiddenVisibility())
2044 Out << " __HIDDEN__";
2046 // If the initializer is not null, emit the initializer. If it is null,
2047 // we try to avoid emitting large amounts of zeros. The problem with
2048 // this, however, occurs when the variable has weak linkage. In this
2049 // case, the assembler will complain about the variable being both weak
2050 // and common, so we disable this optimization.
2051 // FIXME common linkage should avoid this problem.
2052 if (!I->getInitializer()->isNullValue()) {
2054 writeOperand(I->getInitializer(), true);
2055 } else if (I->hasWeakLinkage()) {
2056 // We have to specify an initializer, but it doesn't have to be
2057 // complete. If the value is an aggregate, print out { 0 }, and let
2058 // the compiler figure out the rest of the zeros.
2060 if (isa<StructType>(I->getInitializer()->getType()) ||
2061 isa<VectorType>(I->getInitializer()->getType())) {
2063 } else if (isa<ArrayType>(I->getInitializer()->getType())) {
2064 // As with structs and vectors, but with an extra set of braces
2065 // because arrays are wrapped in structs.
2068 // Just print it out normally.
2069 writeOperand(I->getInitializer(), true);
2077 Out << "\n\n/* Function Bodies */\n";
2079 // Emit some helper functions for dealing with FCMP instruction's
2081 Out << "static inline int llvm_fcmp_ord(double X, double Y) { ";
2082 Out << "return X == X && Y == Y; }\n";
2083 Out << "static inline int llvm_fcmp_uno(double X, double Y) { ";
2084 Out << "return X != X || Y != Y; }\n";
2085 Out << "static inline int llvm_fcmp_ueq(double X, double Y) { ";
2086 Out << "return X == Y || llvm_fcmp_uno(X, Y); }\n";
2087 Out << "static inline int llvm_fcmp_une(double X, double Y) { ";
2088 Out << "return X != Y; }\n";
2089 Out << "static inline int llvm_fcmp_ult(double X, double Y) { ";
2090 Out << "return X < Y || llvm_fcmp_uno(X, Y); }\n";
2091 Out << "static inline int llvm_fcmp_ugt(double X, double Y) { ";
2092 Out << "return X > Y || llvm_fcmp_uno(X, Y); }\n";
2093 Out << "static inline int llvm_fcmp_ule(double X, double Y) { ";
2094 Out << "return X <= Y || llvm_fcmp_uno(X, Y); }\n";
2095 Out << "static inline int llvm_fcmp_uge(double X, double Y) { ";
2096 Out << "return X >= Y || llvm_fcmp_uno(X, Y); }\n";
2097 Out << "static inline int llvm_fcmp_oeq(double X, double Y) { ";
2098 Out << "return X == Y ; }\n";
2099 Out << "static inline int llvm_fcmp_one(double X, double Y) { ";
2100 Out << "return X != Y && llvm_fcmp_ord(X, Y); }\n";
2101 Out << "static inline int llvm_fcmp_olt(double X, double Y) { ";
2102 Out << "return X < Y ; }\n";
2103 Out << "static inline int llvm_fcmp_ogt(double X, double Y) { ";
2104 Out << "return X > Y ; }\n";
2105 Out << "static inline int llvm_fcmp_ole(double X, double Y) { ";
2106 Out << "return X <= Y ; }\n";
2107 Out << "static inline int llvm_fcmp_oge(double X, double Y) { ";
2108 Out << "return X >= Y ; }\n";
2113 /// Output all floating point constants that cannot be printed accurately...
2114 void CWriter::printFloatingPointConstants(Function &F) {
2115 // Scan the module for floating point constants. If any FP constant is used
2116 // in the function, we want to redirect it here so that we do not depend on
2117 // the precision of the printed form, unless the printed form preserves
2120 for (constant_iterator I = constant_begin(&F), E = constant_end(&F);
2122 printFloatingPointConstants(*I);
2127 void CWriter::printFloatingPointConstants(const Constant *C) {
2128 // If this is a constant expression, recursively check for constant fp values.
2129 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
2130 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i)
2131 printFloatingPointConstants(CE->getOperand(i));
2135 // Otherwise, check for a FP constant that we need to print.
2136 const ConstantFP *FPC = dyn_cast<ConstantFP>(C);
2138 // Do not put in FPConstantMap if safe.
2139 isFPCSafeToPrint(FPC) ||
2140 // Already printed this constant?
2141 FPConstantMap.count(FPC))
2144 FPConstantMap[FPC] = FPCounter; // Number the FP constants
2146 if (FPC->getType() == Type::DoubleTy) {
2147 double Val = FPC->getValueAPF().convertToDouble();
2148 uint64_t i = FPC->getValueAPF().bitcastToAPInt().getZExtValue();
2149 Out << "static const ConstantDoubleTy FPConstant" << FPCounter++
2150 << " = 0x" << utohexstr(i)
2151 << "ULL; /* " << Val << " */\n";
2152 } else if (FPC->getType() == Type::FloatTy) {
2153 float Val = FPC->getValueAPF().convertToFloat();
2154 uint32_t i = (uint32_t)FPC->getValueAPF().bitcastToAPInt().
2156 Out << "static const ConstantFloatTy FPConstant" << FPCounter++
2157 << " = 0x" << utohexstr(i)
2158 << "U; /* " << Val << " */\n";
2159 } else if (FPC->getType() == Type::X86_FP80Ty) {
2160 // api needed to prevent premature destruction
2161 APInt api = FPC->getValueAPF().bitcastToAPInt();
2162 const uint64_t *p = api.getRawData();
2163 Out << "static const ConstantFP80Ty FPConstant" << FPCounter++
2164 << " = { 0x" << utohexstr(p[0])
2165 << "ULL, 0x" << utohexstr((uint16_t)p[1]) << ",{0,0,0}"
2166 << "}; /* Long double constant */\n";
2167 } else if (FPC->getType() == Type::PPC_FP128Ty) {
2168 APInt api = FPC->getValueAPF().bitcastToAPInt();
2169 const uint64_t *p = api.getRawData();
2170 Out << "static const ConstantFP128Ty FPConstant" << FPCounter++
2172 << utohexstr(p[0]) << ", 0x" << utohexstr(p[1])
2173 << "}; /* Long double constant */\n";
2176 llvm_unreachable("Unknown float type!");
2182 /// printSymbolTable - Run through symbol table looking for type names. If a
2183 /// type name is found, emit its declaration...
2185 void CWriter::printModuleTypes(const TypeSymbolTable &TST) {
2186 Out << "/* Helper union for bitcasts */\n";
2187 Out << "typedef union {\n";
2188 Out << " unsigned int Int32;\n";
2189 Out << " unsigned long long Int64;\n";
2190 Out << " float Float;\n";
2191 Out << " double Double;\n";
2192 Out << "} llvmBitCastUnion;\n";
2194 // We are only interested in the type plane of the symbol table.
2195 TypeSymbolTable::const_iterator I = TST.begin();
2196 TypeSymbolTable::const_iterator End = TST.end();
2198 // If there are no type names, exit early.
2199 if (I == End) return;
2201 // Print out forward declarations for structure types before anything else!
2202 Out << "/* Structure forward decls */\n";
2203 for (; I != End; ++I) {
2204 std::string Name = "struct l_" + Mang->makeNameProper(I->first);
2205 Out << Name << ";\n";
2206 TypeNames.insert(std::make_pair(I->second, Name));
2211 // Now we can print out typedefs. Above, we guaranteed that this can only be
2212 // for struct or opaque types.
2213 Out << "/* Typedefs */\n";
2214 for (I = TST.begin(); I != End; ++I) {
2215 std::string Name = "l_" + Mang->makeNameProper(I->first);
2217 printType(Out, I->second, false, Name);
2223 // Keep track of which structures have been printed so far...
2224 std::set<const Type *> StructPrinted;
2226 // Loop over all structures then push them into the stack so they are
2227 // printed in the correct order.
2229 Out << "/* Structure contents */\n";
2230 for (I = TST.begin(); I != End; ++I)
2231 if (isa<StructType>(I->second) || isa<ArrayType>(I->second))
2232 // Only print out used types!
2233 printContainedStructs(I->second, StructPrinted);
2236 // Push the struct onto the stack and recursively push all structs
2237 // this one depends on.
2239 // TODO: Make this work properly with vector types
2241 void CWriter::printContainedStructs(const Type *Ty,
2242 std::set<const Type*> &StructPrinted) {
2243 // Don't walk through pointers.
2244 if (isa<PointerType>(Ty) || Ty->isPrimitiveType() || Ty->isInteger()) return;
2246 // Print all contained types first.
2247 for (Type::subtype_iterator I = Ty->subtype_begin(),
2248 E = Ty->subtype_end(); I != E; ++I)
2249 printContainedStructs(*I, StructPrinted);
2251 if (isa<StructType>(Ty) || isa<ArrayType>(Ty)) {
2252 // Check to see if we have already printed this struct.
2253 if (StructPrinted.insert(Ty).second) {
2254 // Print structure type out.
2255 std::string Name = TypeNames[Ty];
2256 printType(Out, Ty, false, Name, true);
2262 void CWriter::printFunctionSignature(const Function *F, bool Prototype) {
2263 /// isStructReturn - Should this function actually return a struct by-value?
2264 bool isStructReturn = F->hasStructRetAttr();
2266 if (F->hasLocalLinkage()) Out << "static ";
2267 if (F->hasDLLImportLinkage()) Out << "__declspec(dllimport) ";
2268 if (F->hasDLLExportLinkage()) Out << "__declspec(dllexport) ";
2269 switch (F->getCallingConv()) {
2270 case CallingConv::X86_StdCall:
2271 Out << "__attribute__((stdcall)) ";
2273 case CallingConv::X86_FastCall:
2274 Out << "__attribute__((fastcall)) ";
2278 // Loop over the arguments, printing them...
2279 const FunctionType *FT = cast<FunctionType>(F->getFunctionType());
2280 const AttrListPtr &PAL = F->getAttributes();
2282 std::stringstream FunctionInnards;
2284 // Print out the name...
2285 FunctionInnards << GetValueName(F) << '(';
2287 bool PrintedArg = false;
2288 if (!F->isDeclaration()) {
2289 if (!F->arg_empty()) {
2290 Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
2293 // If this is a struct-return function, don't print the hidden
2294 // struct-return argument.
2295 if (isStructReturn) {
2296 assert(I != E && "Invalid struct return function!");
2301 std::string ArgName;
2302 for (; I != E; ++I) {
2303 if (PrintedArg) FunctionInnards << ", ";
2304 if (I->hasName() || !Prototype)
2305 ArgName = GetValueName(I);
2308 const Type *ArgTy = I->getType();
2309 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2310 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2311 ByValParams.insert(I);
2313 printType(FunctionInnards, ArgTy,
2314 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt),
2321 // Loop over the arguments, printing them.
2322 FunctionType::param_iterator I = FT->param_begin(), E = FT->param_end();
2325 // If this is a struct-return function, don't print the hidden
2326 // struct-return argument.
2327 if (isStructReturn) {
2328 assert(I != E && "Invalid struct return function!");
2333 for (; I != E; ++I) {
2334 if (PrintedArg) FunctionInnards << ", ";
2335 const Type *ArgTy = *I;
2336 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2337 assert(isa<PointerType>(ArgTy));
2338 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2340 printType(FunctionInnards, ArgTy,
2341 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt));
2347 // Finish printing arguments... if this is a vararg function, print the ...,
2348 // unless there are no known types, in which case, we just emit ().
2350 if (FT->isVarArg() && PrintedArg) {
2351 if (PrintedArg) FunctionInnards << ", ";
2352 FunctionInnards << "..."; // Output varargs portion of signature!
2353 } else if (!FT->isVarArg() && !PrintedArg) {
2354 FunctionInnards << "void"; // ret() -> ret(void) in C.
2356 FunctionInnards << ')';
2358 // Get the return tpe for the function.
2360 if (!isStructReturn)
2361 RetTy = F->getReturnType();
2363 // If this is a struct-return function, print the struct-return type.
2364 RetTy = cast<PointerType>(FT->getParamType(0))->getElementType();
2367 // Print out the return type and the signature built above.
2368 printType(Out, RetTy,
2369 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt),
2370 FunctionInnards.str());
2373 static inline bool isFPIntBitCast(const Instruction &I) {
2374 if (!isa<BitCastInst>(I))
2376 const Type *SrcTy = I.getOperand(0)->getType();
2377 const Type *DstTy = I.getType();
2378 return (SrcTy->isFloatingPoint() && DstTy->isInteger()) ||
2379 (DstTy->isFloatingPoint() && SrcTy->isInteger());
2382 void CWriter::printFunction(Function &F) {
2383 /// isStructReturn - Should this function actually return a struct by-value?
2384 bool isStructReturn = F.hasStructRetAttr();
2386 printFunctionSignature(&F, false);
2389 // If this is a struct return function, handle the result with magic.
2390 if (isStructReturn) {
2391 const Type *StructTy =
2392 cast<PointerType>(F.arg_begin()->getType())->getElementType();
2394 printType(Out, StructTy, false, "StructReturn");
2395 Out << "; /* Struct return temporary */\n";
2398 printType(Out, F.arg_begin()->getType(), false,
2399 GetValueName(F.arg_begin()));
2400 Out << " = &StructReturn;\n";
2403 bool PrintedVar = false;
2405 // print local variable information for the function
2406 for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I) {
2407 if (const AllocaInst *AI = isDirectAlloca(&*I)) {
2409 printType(Out, AI->getAllocatedType(), false, GetValueName(AI));
2410 Out << "; /* Address-exposed local */\n";
2412 } else if (I->getType() != Type::VoidTy && !isInlinableInst(*I)) {
2414 printType(Out, I->getType(), false, GetValueName(&*I));
2417 if (isa<PHINode>(*I)) { // Print out PHI node temporaries as well...
2419 printType(Out, I->getType(), false,
2420 GetValueName(&*I)+"__PHI_TEMPORARY");
2425 // We need a temporary for the BitCast to use so it can pluck a value out
2426 // of a union to do the BitCast. This is separate from the need for a
2427 // variable to hold the result of the BitCast.
2428 if (isFPIntBitCast(*I)) {
2429 Out << " llvmBitCastUnion " << GetValueName(&*I)
2430 << "__BITCAST_TEMPORARY;\n";
2438 if (F.hasExternalLinkage() && F.getName() == "main")
2439 Out << " CODE_FOR_MAIN();\n";
2441 // print the basic blocks
2442 for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
2443 if (Loop *L = LI->getLoopFor(BB)) {
2444 if (L->getHeader() == BB && L->getParentLoop() == 0)
2447 printBasicBlock(BB);
2454 void CWriter::printLoop(Loop *L) {
2455 Out << " do { /* Syntactic loop '" << L->getHeader()->getName()
2456 << "' to make GCC happy */\n";
2457 for (unsigned i = 0, e = L->getBlocks().size(); i != e; ++i) {
2458 BasicBlock *BB = L->getBlocks()[i];
2459 Loop *BBLoop = LI->getLoopFor(BB);
2461 printBasicBlock(BB);
2462 else if (BB == BBLoop->getHeader() && BBLoop->getParentLoop() == L)
2465 Out << " } while (1); /* end of syntactic loop '"
2466 << L->getHeader()->getName() << "' */\n";
2469 void CWriter::printBasicBlock(BasicBlock *BB) {
2471 // Don't print the label for the basic block if there are no uses, or if
2472 // the only terminator use is the predecessor basic block's terminator.
2473 // We have to scan the use list because PHI nodes use basic blocks too but
2474 // do not require a label to be generated.
2476 bool NeedsLabel = false;
2477 for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI)
2478 if (isGotoCodeNecessary(*PI, BB)) {
2483 if (NeedsLabel) Out << GetValueName(BB) << ":\n";
2485 // Output all of the instructions in the basic block...
2486 for (BasicBlock::iterator II = BB->begin(), E = --BB->end(); II != E;
2488 if (!isInlinableInst(*II) && !isDirectAlloca(II)) {
2489 if (II->getType() != Type::VoidTy && !isInlineAsm(*II))
2493 writeInstComputationInline(*II);
2498 // Don't emit prefix or suffix for the terminator.
2499 visit(*BB->getTerminator());
2503 // Specific Instruction type classes... note that all of the casts are
2504 // necessary because we use the instruction classes as opaque types...
2506 void CWriter::visitReturnInst(ReturnInst &I) {
2507 // If this is a struct return function, return the temporary struct.
2508 bool isStructReturn = I.getParent()->getParent()->hasStructRetAttr();
2510 if (isStructReturn) {
2511 Out << " return StructReturn;\n";
2515 // Don't output a void return if this is the last basic block in the function
2516 if (I.getNumOperands() == 0 &&
2517 &*--I.getParent()->getParent()->end() == I.getParent() &&
2518 !I.getParent()->size() == 1) {
2522 if (I.getNumOperands() > 1) {
2525 printType(Out, I.getParent()->getParent()->getReturnType());
2526 Out << " llvm_cbe_mrv_temp = {\n";
2527 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
2529 writeOperand(I.getOperand(i));
2535 Out << " return llvm_cbe_mrv_temp;\n";
2541 if (I.getNumOperands()) {
2543 writeOperand(I.getOperand(0));
2548 void CWriter::visitSwitchInst(SwitchInst &SI) {
2551 writeOperand(SI.getOperand(0));
2552 Out << ") {\n default:\n";
2553 printPHICopiesForSuccessor (SI.getParent(), SI.getDefaultDest(), 2);
2554 printBranchToBlock(SI.getParent(), SI.getDefaultDest(), 2);
2556 for (unsigned i = 2, e = SI.getNumOperands(); i != e; i += 2) {
2558 writeOperand(SI.getOperand(i));
2560 BasicBlock *Succ = cast<BasicBlock>(SI.getOperand(i+1));
2561 printPHICopiesForSuccessor (SI.getParent(), Succ, 2);
2562 printBranchToBlock(SI.getParent(), Succ, 2);
2563 if (Function::iterator(Succ) == next(Function::iterator(SI.getParent())))
2569 void CWriter::visitUnreachableInst(UnreachableInst &I) {
2570 Out << " /*UNREACHABLE*/;\n";
2573 bool CWriter::isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
2574 /// FIXME: This should be reenabled, but loop reordering safe!!
2577 if (next(Function::iterator(From)) != Function::iterator(To))
2578 return true; // Not the direct successor, we need a goto.
2580 //isa<SwitchInst>(From->getTerminator())
2582 if (LI->getLoopFor(From) != LI->getLoopFor(To))
2587 void CWriter::printPHICopiesForSuccessor (BasicBlock *CurBlock,
2588 BasicBlock *Successor,
2590 for (BasicBlock::iterator I = Successor->begin(); isa<PHINode>(I); ++I) {
2591 PHINode *PN = cast<PHINode>(I);
2592 // Now we have to do the printing.
2593 Value *IV = PN->getIncomingValueForBlock(CurBlock);
2594 if (!isa<UndefValue>(IV)) {
2595 Out << std::string(Indent, ' ');
2596 Out << " " << GetValueName(I) << "__PHI_TEMPORARY = ";
2598 Out << "; /* for PHI node */\n";
2603 void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
2605 if (isGotoCodeNecessary(CurBB, Succ)) {
2606 Out << std::string(Indent, ' ') << " goto ";
2612 // Branch instruction printing - Avoid printing out a branch to a basic block
2613 // that immediately succeeds the current one.
2615 void CWriter::visitBranchInst(BranchInst &I) {
2617 if (I.isConditional()) {
2618 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(0))) {
2620 writeOperand(I.getCondition());
2623 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 2);
2624 printBranchToBlock(I.getParent(), I.getSuccessor(0), 2);
2626 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(1))) {
2627 Out << " } else {\n";
2628 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2629 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2632 // First goto not necessary, assume second one is...
2634 writeOperand(I.getCondition());
2637 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2638 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2643 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 0);
2644 printBranchToBlock(I.getParent(), I.getSuccessor(0), 0);
2649 // PHI nodes get copied into temporary values at the end of predecessor basic
2650 // blocks. We now need to copy these temporary values into the REAL value for
2652 void CWriter::visitPHINode(PHINode &I) {
2654 Out << "__PHI_TEMPORARY";
2658 void CWriter::visitBinaryOperator(Instruction &I) {
2659 // binary instructions, shift instructions, setCond instructions.
2660 assert(!isa<PointerType>(I.getType()));
2662 // We must cast the results of binary operations which might be promoted.
2663 bool needsCast = false;
2664 if ((I.getType() == Type::Int8Ty) || (I.getType() == Type::Int16Ty)
2665 || (I.getType() == Type::FloatTy)) {
2668 printType(Out, I.getType(), false);
2672 // If this is a negation operation, print it out as such. For FP, we don't
2673 // want to print "-0.0 - X".
2674 if (BinaryOperator::isNeg(&I)) {
2676 writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
2678 } else if (BinaryOperator::isFNeg(&I)) {
2680 writeOperand(BinaryOperator::getFNegArgument(cast<BinaryOperator>(&I)));
2682 } else if (I.getOpcode() == Instruction::FRem) {
2683 // Output a call to fmod/fmodf instead of emitting a%b
2684 if (I.getType() == Type::FloatTy)
2686 else if (I.getType() == Type::DoubleTy)
2688 else // all 3 flavors of long double
2690 writeOperand(I.getOperand(0));
2692 writeOperand(I.getOperand(1));
2696 // Write out the cast of the instruction's value back to the proper type
2698 bool NeedsClosingParens = writeInstructionCast(I);
2700 // Certain instructions require the operand to be forced to a specific type
2701 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2702 // below for operand 1
2703 writeOperandWithCast(I.getOperand(0), I.getOpcode());
2705 switch (I.getOpcode()) {
2706 case Instruction::Add:
2707 case Instruction::FAdd: Out << " + "; break;
2708 case Instruction::Sub:
2709 case Instruction::FSub: Out << " - "; break;
2710 case Instruction::Mul:
2711 case Instruction::FMul: Out << " * "; break;
2712 case Instruction::URem:
2713 case Instruction::SRem:
2714 case Instruction::FRem: Out << " % "; break;
2715 case Instruction::UDiv:
2716 case Instruction::SDiv:
2717 case Instruction::FDiv: Out << " / "; break;
2718 case Instruction::And: Out << " & "; break;
2719 case Instruction::Or: Out << " | "; break;
2720 case Instruction::Xor: Out << " ^ "; break;
2721 case Instruction::Shl : Out << " << "; break;
2722 case Instruction::LShr:
2723 case Instruction::AShr: Out << " >> "; break;
2726 cerr << "Invalid operator type!" << I;
2728 llvm_unreachable(0);
2731 writeOperandWithCast(I.getOperand(1), I.getOpcode());
2732 if (NeedsClosingParens)
2741 void CWriter::visitICmpInst(ICmpInst &I) {
2742 // We must cast the results of icmp which might be promoted.
2743 bool needsCast = false;
2745 // Write out the cast of the instruction's value back to the proper type
2747 bool NeedsClosingParens = writeInstructionCast(I);
2749 // Certain icmp predicate require the operand to be forced to a specific type
2750 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2751 // below for operand 1
2752 writeOperandWithCast(I.getOperand(0), I);
2754 switch (I.getPredicate()) {
2755 case ICmpInst::ICMP_EQ: Out << " == "; break;
2756 case ICmpInst::ICMP_NE: Out << " != "; break;
2757 case ICmpInst::ICMP_ULE:
2758 case ICmpInst::ICMP_SLE: Out << " <= "; break;
2759 case ICmpInst::ICMP_UGE:
2760 case ICmpInst::ICMP_SGE: Out << " >= "; break;
2761 case ICmpInst::ICMP_ULT:
2762 case ICmpInst::ICMP_SLT: Out << " < "; break;
2763 case ICmpInst::ICMP_UGT:
2764 case ICmpInst::ICMP_SGT: Out << " > "; break;
2767 cerr << "Invalid icmp predicate!" << I;
2769 llvm_unreachable(0);
2772 writeOperandWithCast(I.getOperand(1), I);
2773 if (NeedsClosingParens)
2781 void CWriter::visitFCmpInst(FCmpInst &I) {
2782 if (I.getPredicate() == FCmpInst::FCMP_FALSE) {
2786 if (I.getPredicate() == FCmpInst::FCMP_TRUE) {
2792 switch (I.getPredicate()) {
2793 default: llvm_unreachable("Illegal FCmp predicate");
2794 case FCmpInst::FCMP_ORD: op = "ord"; break;
2795 case FCmpInst::FCMP_UNO: op = "uno"; break;
2796 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
2797 case FCmpInst::FCMP_UNE: op = "une"; break;
2798 case FCmpInst::FCMP_ULT: op = "ult"; break;
2799 case FCmpInst::FCMP_ULE: op = "ule"; break;
2800 case FCmpInst::FCMP_UGT: op = "ugt"; break;
2801 case FCmpInst::FCMP_UGE: op = "uge"; break;
2802 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
2803 case FCmpInst::FCMP_ONE: op = "one"; break;
2804 case FCmpInst::FCMP_OLT: op = "olt"; break;
2805 case FCmpInst::FCMP_OLE: op = "ole"; break;
2806 case FCmpInst::FCMP_OGT: op = "ogt"; break;
2807 case FCmpInst::FCMP_OGE: op = "oge"; break;
2810 Out << "llvm_fcmp_" << op << "(";
2811 // Write the first operand
2812 writeOperand(I.getOperand(0));
2814 // Write the second operand
2815 writeOperand(I.getOperand(1));
2819 static const char * getFloatBitCastField(const Type *Ty) {
2820 switch (Ty->getTypeID()) {
2821 default: llvm_unreachable("Invalid Type");
2822 case Type::FloatTyID: return "Float";
2823 case Type::DoubleTyID: return "Double";
2824 case Type::IntegerTyID: {
2825 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
2834 void CWriter::visitCastInst(CastInst &I) {
2835 const Type *DstTy = I.getType();
2836 const Type *SrcTy = I.getOperand(0)->getType();
2837 if (isFPIntBitCast(I)) {
2839 // These int<->float and long<->double casts need to be handled specially
2840 Out << GetValueName(&I) << "__BITCAST_TEMPORARY."
2841 << getFloatBitCastField(I.getOperand(0)->getType()) << " = ";
2842 writeOperand(I.getOperand(0));
2843 Out << ", " << GetValueName(&I) << "__BITCAST_TEMPORARY."
2844 << getFloatBitCastField(I.getType());
2850 printCast(I.getOpcode(), SrcTy, DstTy);
2852 // Make a sext from i1 work by subtracting the i1 from 0 (an int).
2853 if (SrcTy == Type::Int1Ty && I.getOpcode() == Instruction::SExt)
2856 writeOperand(I.getOperand(0));
2858 if (DstTy == Type::Int1Ty &&
2859 (I.getOpcode() == Instruction::Trunc ||
2860 I.getOpcode() == Instruction::FPToUI ||
2861 I.getOpcode() == Instruction::FPToSI ||
2862 I.getOpcode() == Instruction::PtrToInt)) {
2863 // Make sure we really get a trunc to bool by anding the operand with 1
2869 void CWriter::visitSelectInst(SelectInst &I) {
2871 writeOperand(I.getCondition());
2873 writeOperand(I.getTrueValue());
2875 writeOperand(I.getFalseValue());
2880 void CWriter::lowerIntrinsics(Function &F) {
2881 // This is used to keep track of intrinsics that get generated to a lowered
2882 // function. We must generate the prototypes before the function body which
2883 // will only be expanded on first use (by the loop below).
2884 std::vector<Function*> prototypesToGen;
2886 // Examine all the instructions in this function to find the intrinsics that
2887 // need to be lowered.
2888 for (Function::iterator BB = F.begin(), EE = F.end(); BB != EE; ++BB)
2889 for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; )
2890 if (CallInst *CI = dyn_cast<CallInst>(I++))
2891 if (Function *F = CI->getCalledFunction())
2892 switch (F->getIntrinsicID()) {
2893 case Intrinsic::not_intrinsic:
2894 case Intrinsic::memory_barrier:
2895 case Intrinsic::vastart:
2896 case Intrinsic::vacopy:
2897 case Intrinsic::vaend:
2898 case Intrinsic::returnaddress:
2899 case Intrinsic::frameaddress:
2900 case Intrinsic::setjmp:
2901 case Intrinsic::longjmp:
2902 case Intrinsic::prefetch:
2903 case Intrinsic::dbg_stoppoint:
2904 case Intrinsic::powi:
2905 case Intrinsic::x86_sse_cmp_ss:
2906 case Intrinsic::x86_sse_cmp_ps:
2907 case Intrinsic::x86_sse2_cmp_sd:
2908 case Intrinsic::x86_sse2_cmp_pd:
2909 case Intrinsic::ppc_altivec_lvsl:
2910 // We directly implement these intrinsics
2913 // If this is an intrinsic that directly corresponds to a GCC
2914 // builtin, we handle it.
2915 const char *BuiltinName = "";
2916 #define GET_GCC_BUILTIN_NAME
2917 #include "llvm/Intrinsics.gen"
2918 #undef GET_GCC_BUILTIN_NAME
2919 // If we handle it, don't lower it.
2920 if (BuiltinName[0]) break;
2922 // All other intrinsic calls we must lower.
2923 Instruction *Before = 0;
2924 if (CI != &BB->front())
2925 Before = prior(BasicBlock::iterator(CI));
2927 IL->LowerIntrinsicCall(CI);
2928 if (Before) { // Move iterator to instruction after call
2933 // If the intrinsic got lowered to another call, and that call has
2934 // a definition then we need to make sure its prototype is emitted
2935 // before any calls to it.
2936 if (CallInst *Call = dyn_cast<CallInst>(I))
2937 if (Function *NewF = Call->getCalledFunction())
2938 if (!NewF->isDeclaration())
2939 prototypesToGen.push_back(NewF);
2944 // We may have collected some prototypes to emit in the loop above.
2945 // Emit them now, before the function that uses them is emitted. But,
2946 // be careful not to emit them twice.
2947 std::vector<Function*>::iterator I = prototypesToGen.begin();
2948 std::vector<Function*>::iterator E = prototypesToGen.end();
2949 for ( ; I != E; ++I) {
2950 if (intrinsicPrototypesAlreadyGenerated.insert(*I).second) {
2952 printFunctionSignature(*I, true);
2958 void CWriter::visitCallInst(CallInst &I) {
2959 if (isa<InlineAsm>(I.getOperand(0)))
2960 return visitInlineAsm(I);
2962 bool WroteCallee = false;
2964 // Handle intrinsic function calls first...
2965 if (Function *F = I.getCalledFunction())
2966 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
2967 if (visitBuiltinCall(I, ID, WroteCallee))
2970 Value *Callee = I.getCalledValue();
2972 const PointerType *PTy = cast<PointerType>(Callee->getType());
2973 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
2975 // If this is a call to a struct-return function, assign to the first
2976 // parameter instead of passing it to the call.
2977 const AttrListPtr &PAL = I.getAttributes();
2978 bool hasByVal = I.hasByValArgument();
2979 bool isStructRet = I.hasStructRetAttr();
2981 writeOperandDeref(I.getOperand(1));
2985 if (I.isTailCall()) Out << " /*tail*/ ";
2988 // If this is an indirect call to a struct return function, we need to cast
2989 // the pointer. Ditto for indirect calls with byval arguments.
2990 bool NeedsCast = (hasByVal || isStructRet) && !isa<Function>(Callee);
2992 // GCC is a real PITA. It does not permit codegening casts of functions to
2993 // function pointers if they are in a call (it generates a trap instruction
2994 // instead!). We work around this by inserting a cast to void* in between
2995 // the function and the function pointer cast. Unfortunately, we can't just
2996 // form the constant expression here, because the folder will immediately
2999 // Note finally, that this is completely unsafe. ANSI C does not guarantee
3000 // that void* and function pointers have the same size. :( To deal with this
3001 // in the common case, we handle casts where the number of arguments passed
3004 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Callee))
3006 if (Function *RF = dyn_cast<Function>(CE->getOperand(0))) {
3012 // Ok, just cast the pointer type.
3015 printStructReturnPointerFunctionType(Out, PAL,
3016 cast<PointerType>(I.getCalledValue()->getType()));
3018 printType(Out, I.getCalledValue()->getType(), false, "", true, PAL);
3020 printType(Out, I.getCalledValue()->getType());
3023 writeOperand(Callee);
3024 if (NeedsCast) Out << ')';
3029 unsigned NumDeclaredParams = FTy->getNumParams();
3031 CallSite::arg_iterator AI = I.op_begin()+1, AE = I.op_end();
3033 if (isStructRet) { // Skip struct return argument.
3038 bool PrintedArg = false;
3039 for (; AI != AE; ++AI, ++ArgNo) {
3040 if (PrintedArg) Out << ", ";
3041 if (ArgNo < NumDeclaredParams &&
3042 (*AI)->getType() != FTy->getParamType(ArgNo)) {
3044 printType(Out, FTy->getParamType(ArgNo),
3045 /*isSigned=*/PAL.paramHasAttr(ArgNo+1, Attribute::SExt));
3048 // Check if the argument is expected to be passed by value.
3049 if (I.paramHasAttr(ArgNo+1, Attribute::ByVal))
3050 writeOperandDeref(*AI);
3058 /// visitBuiltinCall - Handle the call to the specified builtin. Returns true
3059 /// if the entire call is handled, return false it it wasn't handled, and
3060 /// optionally set 'WroteCallee' if the callee has already been printed out.
3061 bool CWriter::visitBuiltinCall(CallInst &I, Intrinsic::ID ID,
3062 bool &WroteCallee) {
3065 // If this is an intrinsic that directly corresponds to a GCC
3066 // builtin, we emit it here.
3067 const char *BuiltinName = "";
3068 Function *F = I.getCalledFunction();
3069 #define GET_GCC_BUILTIN_NAME
3070 #include "llvm/Intrinsics.gen"
3071 #undef GET_GCC_BUILTIN_NAME
3072 assert(BuiltinName[0] && "Unknown LLVM intrinsic!");
3078 case Intrinsic::memory_barrier:
3079 Out << "__sync_synchronize()";
3081 case Intrinsic::vastart:
3084 Out << "va_start(*(va_list*)";
3085 writeOperand(I.getOperand(1));
3087 // Output the last argument to the enclosing function.
3088 if (I.getParent()->getParent()->arg_empty()) {
3090 raw_string_ostream Msg(msg);
3091 Msg << "The C backend does not currently support zero "
3092 << "argument varargs functions, such as '"
3093 << I.getParent()->getParent()->getName() << "'!";
3094 llvm_report_error(Msg.str());
3096 writeOperand(--I.getParent()->getParent()->arg_end());
3099 case Intrinsic::vaend:
3100 if (!isa<ConstantPointerNull>(I.getOperand(1))) {
3101 Out << "0; va_end(*(va_list*)";
3102 writeOperand(I.getOperand(1));
3105 Out << "va_end(*(va_list*)0)";
3108 case Intrinsic::vacopy:
3110 Out << "va_copy(*(va_list*)";
3111 writeOperand(I.getOperand(1));
3112 Out << ", *(va_list*)";
3113 writeOperand(I.getOperand(2));
3116 case Intrinsic::returnaddress:
3117 Out << "__builtin_return_address(";
3118 writeOperand(I.getOperand(1));
3121 case Intrinsic::frameaddress:
3122 Out << "__builtin_frame_address(";
3123 writeOperand(I.getOperand(1));
3126 case Intrinsic::powi:
3127 Out << "__builtin_powi(";
3128 writeOperand(I.getOperand(1));
3130 writeOperand(I.getOperand(2));
3133 case Intrinsic::setjmp:
3134 Out << "setjmp(*(jmp_buf*)";
3135 writeOperand(I.getOperand(1));
3138 case Intrinsic::longjmp:
3139 Out << "longjmp(*(jmp_buf*)";
3140 writeOperand(I.getOperand(1));
3142 writeOperand(I.getOperand(2));
3145 case Intrinsic::prefetch:
3146 Out << "LLVM_PREFETCH((const void *)";
3147 writeOperand(I.getOperand(1));
3149 writeOperand(I.getOperand(2));
3151 writeOperand(I.getOperand(3));
3154 case Intrinsic::stacksave:
3155 // Emit this as: Val = 0; *((void**)&Val) = __builtin_stack_save()
3156 // to work around GCC bugs (see PR1809).
3157 Out << "0; *((void**)&" << GetValueName(&I)
3158 << ") = __builtin_stack_save()";
3160 case Intrinsic::dbg_stoppoint: {
3161 // If we use writeOperand directly we get a "u" suffix which is rejected
3163 DbgStopPointInst &SPI = cast<DbgStopPointInst>(I);
3165 GetConstantStringInfo(SPI.getDirectory(), dir);
3167 GetConstantStringInfo(SPI.getFileName(), file);
3171 << dir << '/' << file << "\"\n";
3174 case Intrinsic::x86_sse_cmp_ss:
3175 case Intrinsic::x86_sse_cmp_ps:
3176 case Intrinsic::x86_sse2_cmp_sd:
3177 case Intrinsic::x86_sse2_cmp_pd:
3179 printType(Out, I.getType());
3181 // Multiple GCC builtins multiplex onto this intrinsic.
3182 switch (cast<ConstantInt>(I.getOperand(3))->getZExtValue()) {
3183 default: llvm_unreachable("Invalid llvm.x86.sse.cmp!");
3184 case 0: Out << "__builtin_ia32_cmpeq"; break;
3185 case 1: Out << "__builtin_ia32_cmplt"; break;
3186 case 2: Out << "__builtin_ia32_cmple"; break;
3187 case 3: Out << "__builtin_ia32_cmpunord"; break;
3188 case 4: Out << "__builtin_ia32_cmpneq"; break;
3189 case 5: Out << "__builtin_ia32_cmpnlt"; break;
3190 case 6: Out << "__builtin_ia32_cmpnle"; break;
3191 case 7: Out << "__builtin_ia32_cmpord"; break;
3193 if (ID == Intrinsic::x86_sse_cmp_ps || ID == Intrinsic::x86_sse2_cmp_pd)
3197 if (ID == Intrinsic::x86_sse_cmp_ss || ID == Intrinsic::x86_sse_cmp_ps)
3203 writeOperand(I.getOperand(1));
3205 writeOperand(I.getOperand(2));
3208 case Intrinsic::ppc_altivec_lvsl:
3210 printType(Out, I.getType());
3212 Out << "__builtin_altivec_lvsl(0, (void*)";
3213 writeOperand(I.getOperand(1));
3219 //This converts the llvm constraint string to something gcc is expecting.
3220 //TODO: work out platform independent constraints and factor those out
3221 // of the per target tables
3222 // handle multiple constraint codes
3223 std::string CWriter::InterpretASMConstraint(InlineAsm::ConstraintInfo& c) {
3225 assert(c.Codes.size() == 1 && "Too many asm constraint codes to handle");
3227 const char *const *table = 0;
3229 // Grab the translation table from TargetAsmInfo if it exists.
3231 std::string Triple = TheModule->getTargetTriple();
3233 Triple = llvm::sys::getHostTriple();
3236 const Target *Match = TargetRegistry::lookupTarget(Triple, E);
3238 // Per platform Target Machines don't exist, so create it;
3239 // this must be done only once.
3240 const TargetMachine* TM = Match->createTargetMachine(Triple, "");
3241 TAsm = TM->getTargetAsmInfo();
3245 table = TAsm->getAsmCBE();
3247 // Search the translation table if it exists.
3248 for (int i = 0; table && table[i]; i += 2)
3249 if (c.Codes[0] == table[i])
3252 // Default is identity.
3256 //TODO: import logic from AsmPrinter.cpp
3257 static std::string gccifyAsm(std::string asmstr) {
3258 for (std::string::size_type i = 0; i != asmstr.size(); ++i)
3259 if (asmstr[i] == '\n')
3260 asmstr.replace(i, 1, "\\n");
3261 else if (asmstr[i] == '\t')
3262 asmstr.replace(i, 1, "\\t");
3263 else if (asmstr[i] == '$') {
3264 if (asmstr[i + 1] == '{') {
3265 std::string::size_type a = asmstr.find_first_of(':', i + 1);
3266 std::string::size_type b = asmstr.find_first_of('}', i + 1);
3267 std::string n = "%" +
3268 asmstr.substr(a + 1, b - a - 1) +
3269 asmstr.substr(i + 2, a - i - 2);
3270 asmstr.replace(i, b - i + 1, n);
3273 asmstr.replace(i, 1, "%");
3275 else if (asmstr[i] == '%')//grr
3276 { asmstr.replace(i, 1, "%%"); ++i;}
3281 //TODO: assumptions about what consume arguments from the call are likely wrong
3282 // handle communitivity
3283 void CWriter::visitInlineAsm(CallInst &CI) {
3284 InlineAsm* as = cast<InlineAsm>(CI.getOperand(0));
3285 std::vector<InlineAsm::ConstraintInfo> Constraints = as->ParseConstraints();
3287 std::vector<std::pair<Value*, int> > ResultVals;
3288 if (CI.getType() == Type::VoidTy)
3290 else if (const StructType *ST = dyn_cast<StructType>(CI.getType())) {
3291 for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i)
3292 ResultVals.push_back(std::make_pair(&CI, (int)i));
3294 ResultVals.push_back(std::make_pair(&CI, -1));
3297 // Fix up the asm string for gcc and emit it.
3298 Out << "__asm__ volatile (\"" << gccifyAsm(as->getAsmString()) << "\"\n";
3301 unsigned ValueCount = 0;
3302 bool IsFirst = true;
3304 // Convert over all the output constraints.
3305 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3306 E = Constraints.end(); I != E; ++I) {
3308 if (I->Type != InlineAsm::isOutput) {
3310 continue; // Ignore non-output constraints.
3313 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3314 std::string C = InterpretASMConstraint(*I);
3315 if (C.empty()) continue;
3326 if (ValueCount < ResultVals.size()) {
3327 DestVal = ResultVals[ValueCount].first;
3328 DestValNo = ResultVals[ValueCount].second;
3330 DestVal = CI.getOperand(ValueCount-ResultVals.size()+1);
3332 if (I->isEarlyClobber)
3335 Out << "\"=" << C << "\"(" << GetValueName(DestVal);
3336 if (DestValNo != -1)
3337 Out << ".field" << DestValNo; // Multiple retvals.
3343 // Convert over all the input constraints.
3347 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3348 E = Constraints.end(); I != E; ++I) {
3349 if (I->Type != InlineAsm::isInput) {
3351 continue; // Ignore non-input constraints.
3354 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3355 std::string C = InterpretASMConstraint(*I);
3356 if (C.empty()) continue;
3363 assert(ValueCount >= ResultVals.size() && "Input can't refer to result");
3364 Value *SrcVal = CI.getOperand(ValueCount-ResultVals.size()+1);
3366 Out << "\"" << C << "\"(";
3368 writeOperand(SrcVal);
3370 writeOperandDeref(SrcVal);
3374 // Convert over the clobber constraints.
3377 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3378 E = Constraints.end(); I != E; ++I) {
3379 if (I->Type != InlineAsm::isClobber)
3380 continue; // Ignore non-input constraints.
3382 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3383 std::string C = InterpretASMConstraint(*I);
3384 if (C.empty()) continue;
3391 Out << '\"' << C << '"';
3397 void CWriter::visitMallocInst(MallocInst &I) {
3398 llvm_unreachable("lowerallocations pass didn't work!");
3401 void CWriter::visitAllocaInst(AllocaInst &I) {
3403 printType(Out, I.getType());
3404 Out << ") alloca(sizeof(";
3405 printType(Out, I.getType()->getElementType());
3407 if (I.isArrayAllocation()) {
3409 writeOperand(I.getOperand(0));
3414 void CWriter::visitFreeInst(FreeInst &I) {
3415 llvm_unreachable("lowerallocations pass didn't work!");
3418 void CWriter::printGEPExpression(Value *Ptr, gep_type_iterator I,
3419 gep_type_iterator E, bool Static) {
3421 // If there are no indices, just print out the pointer.
3427 // Find out if the last index is into a vector. If so, we have to print this
3428 // specially. Since vectors can't have elements of indexable type, only the
3429 // last index could possibly be of a vector element.
3430 const VectorType *LastIndexIsVector = 0;
3432 for (gep_type_iterator TmpI = I; TmpI != E; ++TmpI)
3433 LastIndexIsVector = dyn_cast<VectorType>(*TmpI);
3438 // If the last index is into a vector, we can't print it as &a[i][j] because
3439 // we can't index into a vector with j in GCC. Instead, emit this as
3440 // (((float*)&a[i])+j)
3441 if (LastIndexIsVector) {
3443 printType(Out, PointerType::getUnqual(LastIndexIsVector->getElementType()));
3449 // If the first index is 0 (very typical) we can do a number of
3450 // simplifications to clean up the code.
3451 Value *FirstOp = I.getOperand();
3452 if (!isa<Constant>(FirstOp) || !cast<Constant>(FirstOp)->isNullValue()) {
3453 // First index isn't simple, print it the hard way.
3456 ++I; // Skip the zero index.
3458 // Okay, emit the first operand. If Ptr is something that is already address
3459 // exposed, like a global, avoid emitting (&foo)[0], just emit foo instead.
3460 if (isAddressExposed(Ptr)) {
3461 writeOperandInternal(Ptr, Static);
3462 } else if (I != E && isa<StructType>(*I)) {
3463 // If we didn't already emit the first operand, see if we can print it as
3464 // P->f instead of "P[0].f"
3466 Out << "->field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3467 ++I; // eat the struct index as well.
3469 // Instead of emitting P[0][1], emit (*P)[1], which is more idiomatic.
3476 for (; I != E; ++I) {
3477 if (isa<StructType>(*I)) {
3478 Out << ".field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3479 } else if (isa<ArrayType>(*I)) {
3481 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3483 } else if (!isa<VectorType>(*I)) {
3485 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3488 // If the last index is into a vector, then print it out as "+j)". This
3489 // works with the 'LastIndexIsVector' code above.
3490 if (isa<Constant>(I.getOperand()) &&
3491 cast<Constant>(I.getOperand())->isNullValue()) {
3492 Out << "))"; // avoid "+0".
3495 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3503 void CWriter::writeMemoryAccess(Value *Operand, const Type *OperandType,
3504 bool IsVolatile, unsigned Alignment) {
3506 bool IsUnaligned = Alignment &&
3507 Alignment < TD->getABITypeAlignment(OperandType);
3511 if (IsVolatile || IsUnaligned) {
3514 Out << "struct __attribute__ ((packed, aligned(" << Alignment << "))) {";
3515 printType(Out, OperandType, false, IsUnaligned ? "data" : "volatile*");
3518 if (IsVolatile) Out << "volatile ";
3524 writeOperand(Operand);
3526 if (IsVolatile || IsUnaligned) {
3533 void CWriter::visitLoadInst(LoadInst &I) {
3534 writeMemoryAccess(I.getOperand(0), I.getType(), I.isVolatile(),
3539 void CWriter::visitStoreInst(StoreInst &I) {
3540 writeMemoryAccess(I.getPointerOperand(), I.getOperand(0)->getType(),
3541 I.isVolatile(), I.getAlignment());
3543 Value *Operand = I.getOperand(0);
3544 Constant *BitMask = 0;
3545 if (const IntegerType* ITy = dyn_cast<IntegerType>(Operand->getType()))
3546 if (!ITy->isPowerOf2ByteWidth())
3547 // We have a bit width that doesn't match an even power-of-2 byte
3548 // size. Consequently we must & the value with the type's bit mask
3549 BitMask = ConstantInt::get(ITy, ITy->getBitMask());
3552 writeOperand(Operand);
3555 printConstant(BitMask, false);
3560 void CWriter::visitGetElementPtrInst(GetElementPtrInst &I) {
3561 printGEPExpression(I.getPointerOperand(), gep_type_begin(I),
3562 gep_type_end(I), false);
3565 void CWriter::visitVAArgInst(VAArgInst &I) {
3566 Out << "va_arg(*(va_list*)";
3567 writeOperand(I.getOperand(0));
3569 printType(Out, I.getType());
3573 void CWriter::visitInsertElementInst(InsertElementInst &I) {
3574 const Type *EltTy = I.getType()->getElementType();
3575 writeOperand(I.getOperand(0));
3578 printType(Out, PointerType::getUnqual(EltTy));
3579 Out << ")(&" << GetValueName(&I) << "))[";
3580 writeOperand(I.getOperand(2));
3582 writeOperand(I.getOperand(1));
3586 void CWriter::visitExtractElementInst(ExtractElementInst &I) {
3587 // We know that our operand is not inlined.
3590 cast<VectorType>(I.getOperand(0)->getType())->getElementType();
3591 printType(Out, PointerType::getUnqual(EltTy));
3592 Out << ")(&" << GetValueName(I.getOperand(0)) << "))[";
3593 writeOperand(I.getOperand(1));
3597 void CWriter::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
3599 printType(Out, SVI.getType());
3601 const VectorType *VT = SVI.getType();
3602 unsigned NumElts = VT->getNumElements();
3603 const Type *EltTy = VT->getElementType();
3605 for (unsigned i = 0; i != NumElts; ++i) {
3607 int SrcVal = SVI.getMaskValue(i);
3608 if ((unsigned)SrcVal >= NumElts*2) {
3609 Out << " 0/*undef*/ ";
3611 Value *Op = SVI.getOperand((unsigned)SrcVal >= NumElts);
3612 if (isa<Instruction>(Op)) {
3613 // Do an extractelement of this value from the appropriate input.
3615 printType(Out, PointerType::getUnqual(EltTy));
3616 Out << ")(&" << GetValueName(Op)
3617 << "))[" << (SrcVal & (NumElts-1)) << "]";
3618 } else if (isa<ConstantAggregateZero>(Op) || isa<UndefValue>(Op)) {
3621 printConstant(cast<ConstantVector>(Op)->getOperand(SrcVal &
3630 void CWriter::visitInsertValueInst(InsertValueInst &IVI) {
3631 // Start by copying the entire aggregate value into the result variable.
3632 writeOperand(IVI.getOperand(0));
3635 // Then do the insert to update the field.
3636 Out << GetValueName(&IVI);
3637 for (const unsigned *b = IVI.idx_begin(), *i = b, *e = IVI.idx_end();
3639 const Type *IndexedTy =
3640 ExtractValueInst::getIndexedType(IVI.getOperand(0)->getType(), b, i+1);
3641 if (isa<ArrayType>(IndexedTy))
3642 Out << ".array[" << *i << "]";
3644 Out << ".field" << *i;
3647 writeOperand(IVI.getOperand(1));
3650 void CWriter::visitExtractValueInst(ExtractValueInst &EVI) {
3652 if (isa<UndefValue>(EVI.getOperand(0))) {
3654 printType(Out, EVI.getType());
3655 Out << ") 0/*UNDEF*/";
3657 Out << GetValueName(EVI.getOperand(0));
3658 for (const unsigned *b = EVI.idx_begin(), *i = b, *e = EVI.idx_end();
3660 const Type *IndexedTy =
3661 ExtractValueInst::getIndexedType(EVI.getOperand(0)->getType(), b, i+1);
3662 if (isa<ArrayType>(IndexedTy))
3663 Out << ".array[" << *i << "]";
3665 Out << ".field" << *i;
3671 //===----------------------------------------------------------------------===//
3672 // External Interface declaration
3673 //===----------------------------------------------------------------------===//
3675 bool CTargetMachine::addPassesToEmitWholeFile(PassManager &PM,
3676 formatted_raw_ostream &o,
3677 CodeGenFileType FileType,
3678 CodeGenOpt::Level OptLevel) {
3679 if (FileType != TargetMachine::AssemblyFile) return true;
3681 PM.add(createGCLoweringPass());
3682 PM.add(createLowerAllocationsPass(true));
3683 PM.add(createLowerInvokePass());
3684 PM.add(createCFGSimplificationPass()); // clean up after lower invoke.
3685 PM.add(new CBackendNameAllUsedStructsAndMergeFunctions());
3686 PM.add(new CWriter(o));
3687 PM.add(createGCInfoDeleter());