1 //===-- CBackend.cpp - Library for converting LLVM code to C --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This library converts LLVM code to C code, compilable by GCC and other C
13 //===----------------------------------------------------------------------===//
15 #include "CTargetMachine.h"
16 #include "llvm/CallingConv.h"
17 #include "llvm/Constants.h"
18 #include "llvm/DerivedTypes.h"
19 #include "llvm/Module.h"
20 #include "llvm/Instructions.h"
21 #include "llvm/Pass.h"
22 #include "llvm/PassManager.h"
23 #include "llvm/TypeSymbolTable.h"
24 #include "llvm/Intrinsics.h"
25 #include "llvm/IntrinsicInst.h"
26 #include "llvm/InlineAsm.h"
27 #include "llvm/Analysis/ConstantsScanner.h"
28 #include "llvm/Analysis/FindUsedTypes.h"
29 #include "llvm/Analysis/LoopInfo.h"
30 #include "llvm/CodeGen/Passes.h"
31 #include "llvm/CodeGen/IntrinsicLowering.h"
32 #include "llvm/Transforms/Scalar.h"
33 #include "llvm/Target/TargetMachineRegistry.h"
34 #include "llvm/Target/TargetAsmInfo.h"
35 #include "llvm/Target/TargetData.h"
36 #include "llvm/Support/CallSite.h"
37 #include "llvm/Support/CFG.h"
38 #include "llvm/Support/ErrorHandling.h"
39 #include "llvm/Support/GetElementPtrTypeIterator.h"
40 #include "llvm/Support/InstVisitor.h"
41 #include "llvm/Support/Mangler.h"
42 #include "llvm/Support/MathExtras.h"
43 #include "llvm/Support/raw_ostream.h"
44 #include "llvm/ADT/StringExtras.h"
45 #include "llvm/ADT/STLExtras.h"
46 #include "llvm/Support/MathExtras.h"
47 #include "llvm/Config/config.h"
52 /// CBackendTargetMachineModule - Note that this is used on hosts that
53 /// cannot link in a library unless there are references into the
54 /// library. In particular, it seems that it is not possible to get
55 /// things to work on Win32 without this. Though it is unused, do not
57 extern "C" int CBackendTargetMachineModule;
58 int CBackendTargetMachineModule = 0;
60 // Register the target.
61 static RegisterTarget<CTargetMachine> X("c", "C backend");
63 // Force static initialization.
64 extern "C" void LLVMInitializeCBackendTarget() { }
67 /// CBackendNameAllUsedStructsAndMergeFunctions - This pass inserts names for
68 /// any unnamed structure types that are used by the program, and merges
69 /// external functions with the same name.
71 class CBackendNameAllUsedStructsAndMergeFunctions : public ModulePass {
74 CBackendNameAllUsedStructsAndMergeFunctions()
76 void getAnalysisUsage(AnalysisUsage &AU) const {
77 AU.addRequired<FindUsedTypes>();
80 virtual const char *getPassName() const {
81 return "C backend type canonicalizer";
84 virtual bool runOnModule(Module &M);
87 char CBackendNameAllUsedStructsAndMergeFunctions::ID = 0;
89 /// CWriter - This class is the main chunk of code that converts an LLVM
90 /// module to a C translation unit.
91 class CWriter : public FunctionPass, public InstVisitor<CWriter> {
93 IntrinsicLowering *IL;
96 const Module *TheModule;
97 const TargetAsmInfo* TAsm;
99 std::map<const Type *, std::string> TypeNames;
100 std::map<const ConstantFP *, unsigned> FPConstantMap;
101 std::set<Function*> intrinsicPrototypesAlreadyGenerated;
102 std::set<const Argument*> ByValParams;
104 unsigned OpaqueCounter;
108 explicit CWriter(raw_ostream &o)
109 : FunctionPass(&ID), Out(o), IL(0), Mang(0), LI(0),
110 TheModule(0), TAsm(0), TD(0), OpaqueCounter(0) {
114 virtual const char *getPassName() const { return "C backend"; }
116 void getAnalysisUsage(AnalysisUsage &AU) const {
117 AU.addRequired<LoopInfo>();
118 AU.setPreservesAll();
121 virtual bool doInitialization(Module &M);
123 bool runOnFunction(Function &F) {
124 // Do not codegen any 'available_externally' functions at all, they have
125 // definitions outside the translation unit.
126 if (F.hasAvailableExternallyLinkage())
129 LI = &getAnalysis<LoopInfo>();
131 // Get rid of intrinsics we can't handle.
134 // Output all floating point constants that cannot be printed accurately.
135 printFloatingPointConstants(F);
141 virtual bool doFinalization(Module &M) {
146 FPConstantMap.clear();
149 intrinsicPrototypesAlreadyGenerated.clear();
153 raw_ostream &printType(raw_ostream &Out, const Type *Ty,
154 bool isSigned = false,
155 const std::string &VariableName = "",
156 bool IgnoreName = false,
157 const AttrListPtr &PAL = AttrListPtr());
158 std::ostream &printType(std::ostream &Out, const Type *Ty,
159 bool isSigned = false,
160 const std::string &VariableName = "",
161 bool IgnoreName = false,
162 const AttrListPtr &PAL = AttrListPtr());
163 raw_ostream &printSimpleType(raw_ostream &Out, const Type *Ty,
165 const std::string &NameSoFar = "");
166 std::ostream &printSimpleType(std::ostream &Out, const Type *Ty,
168 const std::string &NameSoFar = "");
170 void printStructReturnPointerFunctionType(raw_ostream &Out,
171 const AttrListPtr &PAL,
172 const PointerType *Ty);
174 /// writeOperandDeref - Print the result of dereferencing the specified
175 /// operand with '*'. This is equivalent to printing '*' then using
176 /// writeOperand, but avoids excess syntax in some cases.
177 void writeOperandDeref(Value *Operand) {
178 if (isAddressExposed(Operand)) {
179 // Already something with an address exposed.
180 writeOperandInternal(Operand);
183 writeOperand(Operand);
188 void writeOperand(Value *Operand, bool Static = false);
189 void writeInstComputationInline(Instruction &I);
190 void writeOperandInternal(Value *Operand, bool Static = false);
191 void writeOperandWithCast(Value* Operand, unsigned Opcode);
192 void writeOperandWithCast(Value* Operand, const ICmpInst &I);
193 bool writeInstructionCast(const Instruction &I);
195 void writeMemoryAccess(Value *Operand, const Type *OperandType,
196 bool IsVolatile, unsigned Alignment);
199 std::string InterpretASMConstraint(InlineAsm::ConstraintInfo& c);
201 void lowerIntrinsics(Function &F);
203 void printModule(Module *M);
204 void printModuleTypes(const TypeSymbolTable &ST);
205 void printContainedStructs(const Type *Ty, std::set<const Type *> &);
206 void printFloatingPointConstants(Function &F);
207 void printFloatingPointConstants(const Constant *C);
208 void printFunctionSignature(const Function *F, bool Prototype);
210 void printFunction(Function &);
211 void printBasicBlock(BasicBlock *BB);
212 void printLoop(Loop *L);
214 void printCast(unsigned opcode, const Type *SrcTy, const Type *DstTy);
215 void printConstant(Constant *CPV, bool Static);
216 void printConstantWithCast(Constant *CPV, unsigned Opcode);
217 bool printConstExprCast(const ConstantExpr *CE, bool Static);
218 void printConstantArray(ConstantArray *CPA, bool Static);
219 void printConstantVector(ConstantVector *CV, bool Static);
221 /// isAddressExposed - Return true if the specified value's name needs to
222 /// have its address taken in order to get a C value of the correct type.
223 /// This happens for global variables, byval parameters, and direct allocas.
224 bool isAddressExposed(const Value *V) const {
225 if (const Argument *A = dyn_cast<Argument>(V))
226 return ByValParams.count(A);
227 return isa<GlobalVariable>(V) || isDirectAlloca(V);
230 // isInlinableInst - Attempt to inline instructions into their uses to build
231 // trees as much as possible. To do this, we have to consistently decide
232 // what is acceptable to inline, so that variable declarations don't get
233 // printed and an extra copy of the expr is not emitted.
235 static bool isInlinableInst(const Instruction &I) {
236 // Always inline cmp instructions, even if they are shared by multiple
237 // expressions. GCC generates horrible code if we don't.
241 // Must be an expression, must be used exactly once. If it is dead, we
242 // emit it inline where it would go.
243 if (I.getType() == Type::VoidTy || !I.hasOneUse() ||
244 isa<TerminatorInst>(I) || isa<CallInst>(I) || isa<PHINode>(I) ||
245 isa<LoadInst>(I) || isa<VAArgInst>(I) || isa<InsertElementInst>(I) ||
246 isa<InsertValueInst>(I))
247 // Don't inline a load across a store or other bad things!
250 // Must not be used in inline asm, extractelement, or shufflevector.
252 const Instruction &User = cast<Instruction>(*I.use_back());
253 if (isInlineAsm(User) || isa<ExtractElementInst>(User) ||
254 isa<ShuffleVectorInst>(User))
258 // Only inline instruction it if it's use is in the same BB as the inst.
259 return I.getParent() == cast<Instruction>(I.use_back())->getParent();
262 // isDirectAlloca - Define fixed sized allocas in the entry block as direct
263 // variables which are accessed with the & operator. This causes GCC to
264 // generate significantly better code than to emit alloca calls directly.
266 static const AllocaInst *isDirectAlloca(const Value *V) {
267 const AllocaInst *AI = dyn_cast<AllocaInst>(V);
268 if (!AI) return false;
269 if (AI->isArrayAllocation())
270 return 0; // FIXME: we can also inline fixed size array allocas!
271 if (AI->getParent() != &AI->getParent()->getParent()->getEntryBlock())
276 // isInlineAsm - Check if the instruction is a call to an inline asm chunk
277 static bool isInlineAsm(const Instruction& I) {
278 if (isa<CallInst>(&I) && isa<InlineAsm>(I.getOperand(0)))
283 // Instruction visitation functions
284 friend class InstVisitor<CWriter>;
286 void visitReturnInst(ReturnInst &I);
287 void visitBranchInst(BranchInst &I);
288 void visitSwitchInst(SwitchInst &I);
289 void visitInvokeInst(InvokeInst &I) {
290 LLVM_UNREACHABLE("Lowerinvoke pass didn't work!");
293 void visitUnwindInst(UnwindInst &I) {
294 LLVM_UNREACHABLE("Lowerinvoke pass didn't work!");
296 void visitUnreachableInst(UnreachableInst &I);
298 void visitPHINode(PHINode &I);
299 void visitBinaryOperator(Instruction &I);
300 void visitICmpInst(ICmpInst &I);
301 void visitFCmpInst(FCmpInst &I);
303 void visitCastInst (CastInst &I);
304 void visitSelectInst(SelectInst &I);
305 void visitCallInst (CallInst &I);
306 void visitInlineAsm(CallInst &I);
307 bool visitBuiltinCall(CallInst &I, Intrinsic::ID ID, bool &WroteCallee);
309 void visitMallocInst(MallocInst &I);
310 void visitAllocaInst(AllocaInst &I);
311 void visitFreeInst (FreeInst &I);
312 void visitLoadInst (LoadInst &I);
313 void visitStoreInst (StoreInst &I);
314 void visitGetElementPtrInst(GetElementPtrInst &I);
315 void visitVAArgInst (VAArgInst &I);
317 void visitInsertElementInst(InsertElementInst &I);
318 void visitExtractElementInst(ExtractElementInst &I);
319 void visitShuffleVectorInst(ShuffleVectorInst &SVI);
321 void visitInsertValueInst(InsertValueInst &I);
322 void visitExtractValueInst(ExtractValueInst &I);
324 void visitInstruction(Instruction &I) {
326 cerr << "C Writer does not know about " << I;
331 void outputLValue(Instruction *I) {
332 Out << " " << GetValueName(I) << " = ";
335 bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To);
336 void printPHICopiesForSuccessor(BasicBlock *CurBlock,
337 BasicBlock *Successor, unsigned Indent);
338 void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
340 void printGEPExpression(Value *Ptr, gep_type_iterator I,
341 gep_type_iterator E, bool Static);
343 std::string GetValueName(const Value *Operand);
347 char CWriter::ID = 0;
349 /// This method inserts names for any unnamed structure types that are used by
350 /// the program, and removes names from structure types that are not used by the
353 bool CBackendNameAllUsedStructsAndMergeFunctions::runOnModule(Module &M) {
354 // Get a set of types that are used by the program...
355 std::set<const Type *> UT = getAnalysis<FindUsedTypes>().getTypes();
357 // Loop over the module symbol table, removing types from UT that are
358 // already named, and removing names for types that are not used.
360 TypeSymbolTable &TST = M.getTypeSymbolTable();
361 for (TypeSymbolTable::iterator TI = TST.begin(), TE = TST.end();
363 TypeSymbolTable::iterator I = TI++;
365 // If this isn't a struct or array type, remove it from our set of types
366 // to name. This simplifies emission later.
367 if (!isa<StructType>(I->second) && !isa<OpaqueType>(I->second) &&
368 !isa<ArrayType>(I->second)) {
371 // If this is not used, remove it from the symbol table.
372 std::set<const Type *>::iterator UTI = UT.find(I->second);
376 UT.erase(UTI); // Only keep one name for this type.
380 // UT now contains types that are not named. Loop over it, naming
383 bool Changed = false;
384 unsigned RenameCounter = 0;
385 for (std::set<const Type *>::const_iterator I = UT.begin(), E = UT.end();
387 if (isa<StructType>(*I) || isa<ArrayType>(*I)) {
388 while (M.addTypeName("unnamed"+utostr(RenameCounter), *I))
394 // Loop over all external functions and globals. If we have two with
395 // identical names, merge them.
396 // FIXME: This code should disappear when we don't allow values with the same
397 // names when they have different types!
398 std::map<std::string, GlobalValue*> ExtSymbols;
399 for (Module::iterator I = M.begin(), E = M.end(); I != E;) {
401 if (GV->isDeclaration() && GV->hasName()) {
402 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
403 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
405 // Found a conflict, replace this global with the previous one.
406 GlobalValue *OldGV = X.first->second;
407 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
408 GV->eraseFromParent();
413 // Do the same for globals.
414 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
416 GlobalVariable *GV = I++;
417 if (GV->isDeclaration() && GV->hasName()) {
418 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
419 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
421 // Found a conflict, replace this global with the previous one.
422 GlobalValue *OldGV = X.first->second;
423 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
424 GV->eraseFromParent();
433 /// printStructReturnPointerFunctionType - This is like printType for a struct
434 /// return type, except, instead of printing the type as void (*)(Struct*, ...)
435 /// print it as "Struct (*)(...)", for struct return functions.
436 void CWriter::printStructReturnPointerFunctionType(raw_ostream &Out,
437 const AttrListPtr &PAL,
438 const PointerType *TheTy) {
439 const FunctionType *FTy = cast<FunctionType>(TheTy->getElementType());
440 std::stringstream FunctionInnards;
441 FunctionInnards << " (*) (";
442 bool PrintedType = false;
444 FunctionType::param_iterator I = FTy->param_begin(), E = FTy->param_end();
445 const Type *RetTy = cast<PointerType>(I->get())->getElementType();
447 for (++I, ++Idx; I != E; ++I, ++Idx) {
449 FunctionInnards << ", ";
450 const Type *ArgTy = *I;
451 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
452 assert(isa<PointerType>(ArgTy));
453 ArgTy = cast<PointerType>(ArgTy)->getElementType();
455 printType(FunctionInnards, ArgTy,
456 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
459 if (FTy->isVarArg()) {
461 FunctionInnards << ", ...";
462 } else if (!PrintedType) {
463 FunctionInnards << "void";
465 FunctionInnards << ')';
466 std::string tstr = FunctionInnards.str();
467 printType(Out, RetTy,
468 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
472 CWriter::printSimpleType(raw_ostream &Out, const Type *Ty, bool isSigned,
473 const std::string &NameSoFar) {
474 assert((Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) &&
475 "Invalid type for printSimpleType");
476 switch (Ty->getTypeID()) {
477 case Type::VoidTyID: return Out << "void " << NameSoFar;
478 case Type::IntegerTyID: {
479 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
481 return Out << "bool " << NameSoFar;
482 else if (NumBits <= 8)
483 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
484 else if (NumBits <= 16)
485 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
486 else if (NumBits <= 32)
487 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
488 else if (NumBits <= 64)
489 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
491 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
492 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
495 case Type::FloatTyID: return Out << "float " << NameSoFar;
496 case Type::DoubleTyID: return Out << "double " << NameSoFar;
497 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
498 // present matches host 'long double'.
499 case Type::X86_FP80TyID:
500 case Type::PPC_FP128TyID:
501 case Type::FP128TyID: return Out << "long double " << NameSoFar;
503 case Type::VectorTyID: {
504 const VectorType *VTy = cast<VectorType>(Ty);
505 return printSimpleType(Out, VTy->getElementType(), isSigned,
506 " __attribute__((vector_size(" +
507 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
512 cerr << "Unknown primitive type: " << *Ty << "\n";
519 CWriter::printSimpleType(std::ostream &Out, const Type *Ty, bool isSigned,
520 const std::string &NameSoFar) {
521 assert((Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) &&
522 "Invalid type for printSimpleType");
523 switch (Ty->getTypeID()) {
524 case Type::VoidTyID: return Out << "void " << NameSoFar;
525 case Type::IntegerTyID: {
526 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
528 return Out << "bool " << NameSoFar;
529 else if (NumBits <= 8)
530 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
531 else if (NumBits <= 16)
532 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
533 else if (NumBits <= 32)
534 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
535 else if (NumBits <= 64)
536 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
538 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
539 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
542 case Type::FloatTyID: return Out << "float " << NameSoFar;
543 case Type::DoubleTyID: return Out << "double " << NameSoFar;
544 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
545 // present matches host 'long double'.
546 case Type::X86_FP80TyID:
547 case Type::PPC_FP128TyID:
548 case Type::FP128TyID: return Out << "long double " << NameSoFar;
550 case Type::VectorTyID: {
551 const VectorType *VTy = cast<VectorType>(Ty);
552 return printSimpleType(Out, VTy->getElementType(), isSigned,
553 " __attribute__((vector_size(" +
554 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
559 cerr << "Unknown primitive type: " << *Ty << "\n";
565 // Pass the Type* and the variable name and this prints out the variable
568 raw_ostream &CWriter::printType(raw_ostream &Out, const Type *Ty,
569 bool isSigned, const std::string &NameSoFar,
570 bool IgnoreName, const AttrListPtr &PAL) {
571 if (Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) {
572 printSimpleType(Out, Ty, isSigned, NameSoFar);
576 // Check to see if the type is named.
577 if (!IgnoreName || isa<OpaqueType>(Ty)) {
578 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
579 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
582 switch (Ty->getTypeID()) {
583 case Type::FunctionTyID: {
584 const FunctionType *FTy = cast<FunctionType>(Ty);
585 std::stringstream FunctionInnards;
586 FunctionInnards << " (" << NameSoFar << ") (";
588 for (FunctionType::param_iterator I = FTy->param_begin(),
589 E = FTy->param_end(); I != E; ++I) {
590 const Type *ArgTy = *I;
591 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
592 assert(isa<PointerType>(ArgTy));
593 ArgTy = cast<PointerType>(ArgTy)->getElementType();
595 if (I != FTy->param_begin())
596 FunctionInnards << ", ";
597 printType(FunctionInnards, ArgTy,
598 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
601 if (FTy->isVarArg()) {
602 if (FTy->getNumParams())
603 FunctionInnards << ", ...";
604 } else if (!FTy->getNumParams()) {
605 FunctionInnards << "void";
607 FunctionInnards << ')';
608 std::string tstr = FunctionInnards.str();
609 printType(Out, FTy->getReturnType(),
610 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
613 case Type::StructTyID: {
614 const StructType *STy = cast<StructType>(Ty);
615 Out << NameSoFar + " {\n";
617 for (StructType::element_iterator I = STy->element_begin(),
618 E = STy->element_end(); I != E; ++I) {
620 printType(Out, *I, false, "field" + utostr(Idx++));
625 Out << " __attribute__ ((packed))";
629 case Type::PointerTyID: {
630 const PointerType *PTy = cast<PointerType>(Ty);
631 std::string ptrName = "*" + NameSoFar;
633 if (isa<ArrayType>(PTy->getElementType()) ||
634 isa<VectorType>(PTy->getElementType()))
635 ptrName = "(" + ptrName + ")";
638 // Must be a function ptr cast!
639 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
640 return printType(Out, PTy->getElementType(), false, ptrName);
643 case Type::ArrayTyID: {
644 const ArrayType *ATy = cast<ArrayType>(Ty);
645 unsigned NumElements = ATy->getNumElements();
646 if (NumElements == 0) NumElements = 1;
647 // Arrays are wrapped in structs to allow them to have normal
648 // value semantics (avoiding the array "decay").
649 Out << NameSoFar << " { ";
650 printType(Out, ATy->getElementType(), false,
651 "array[" + utostr(NumElements) + "]");
655 case Type::OpaqueTyID: {
656 std::string TyName = "struct opaque_" + itostr(OpaqueCounter++);
657 assert(TypeNames.find(Ty) == TypeNames.end());
658 TypeNames[Ty] = TyName;
659 return Out << TyName << ' ' << NameSoFar;
662 LLVM_UNREACHABLE("Unhandled case in getTypeProps!");
668 // Pass the Type* and the variable name and this prints out the variable
671 std::ostream &CWriter::printType(std::ostream &Out, const Type *Ty,
672 bool isSigned, const std::string &NameSoFar,
673 bool IgnoreName, const AttrListPtr &PAL) {
674 if (Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) {
675 printSimpleType(Out, Ty, isSigned, NameSoFar);
679 // Check to see if the type is named.
680 if (!IgnoreName || isa<OpaqueType>(Ty)) {
681 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
682 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
685 switch (Ty->getTypeID()) {
686 case Type::FunctionTyID: {
687 const FunctionType *FTy = cast<FunctionType>(Ty);
688 std::stringstream FunctionInnards;
689 FunctionInnards << " (" << NameSoFar << ") (";
691 for (FunctionType::param_iterator I = FTy->param_begin(),
692 E = FTy->param_end(); I != E; ++I) {
693 const Type *ArgTy = *I;
694 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
695 assert(isa<PointerType>(ArgTy));
696 ArgTy = cast<PointerType>(ArgTy)->getElementType();
698 if (I != FTy->param_begin())
699 FunctionInnards << ", ";
700 printType(FunctionInnards, ArgTy,
701 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
704 if (FTy->isVarArg()) {
705 if (FTy->getNumParams())
706 FunctionInnards << ", ...";
707 } else if (!FTy->getNumParams()) {
708 FunctionInnards << "void";
710 FunctionInnards << ')';
711 std::string tstr = FunctionInnards.str();
712 printType(Out, FTy->getReturnType(),
713 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
716 case Type::StructTyID: {
717 const StructType *STy = cast<StructType>(Ty);
718 Out << NameSoFar + " {\n";
720 for (StructType::element_iterator I = STy->element_begin(),
721 E = STy->element_end(); I != E; ++I) {
723 printType(Out, *I, false, "field" + utostr(Idx++));
728 Out << " __attribute__ ((packed))";
732 case Type::PointerTyID: {
733 const PointerType *PTy = cast<PointerType>(Ty);
734 std::string ptrName = "*" + NameSoFar;
736 if (isa<ArrayType>(PTy->getElementType()) ||
737 isa<VectorType>(PTy->getElementType()))
738 ptrName = "(" + ptrName + ")";
741 // Must be a function ptr cast!
742 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
743 return printType(Out, PTy->getElementType(), false, ptrName);
746 case Type::ArrayTyID: {
747 const ArrayType *ATy = cast<ArrayType>(Ty);
748 unsigned NumElements = ATy->getNumElements();
749 if (NumElements == 0) NumElements = 1;
750 // Arrays are wrapped in structs to allow them to have normal
751 // value semantics (avoiding the array "decay").
752 Out << NameSoFar << " { ";
753 printType(Out, ATy->getElementType(), false,
754 "array[" + utostr(NumElements) + "]");
758 case Type::OpaqueTyID: {
759 std::string TyName = "struct opaque_" + itostr(OpaqueCounter++);
760 assert(TypeNames.find(Ty) == TypeNames.end());
761 TypeNames[Ty] = TyName;
762 return Out << TyName << ' ' << NameSoFar;
765 LLVM_UNREACHABLE("Unhandled case in getTypeProps!");
771 void CWriter::printConstantArray(ConstantArray *CPA, bool Static) {
773 // As a special case, print the array as a string if it is an array of
774 // ubytes or an array of sbytes with positive values.
776 const Type *ETy = CPA->getType()->getElementType();
777 bool isString = (ETy == Type::Int8Ty || ETy == Type::Int8Ty);
779 // Make sure the last character is a null char, as automatically added by C
780 if (isString && (CPA->getNumOperands() == 0 ||
781 !cast<Constant>(*(CPA->op_end()-1))->isNullValue()))
786 // Keep track of whether the last number was a hexadecimal escape
787 bool LastWasHex = false;
789 // Do not include the last character, which we know is null
790 for (unsigned i = 0, e = CPA->getNumOperands()-1; i != e; ++i) {
791 unsigned char C = cast<ConstantInt>(CPA->getOperand(i))->getZExtValue();
793 // Print it out literally if it is a printable character. The only thing
794 // to be careful about is when the last letter output was a hex escape
795 // code, in which case we have to be careful not to print out hex digits
796 // explicitly (the C compiler thinks it is a continuation of the previous
797 // character, sheesh...)
799 if (isprint(C) && (!LastWasHex || !isxdigit(C))) {
801 if (C == '"' || C == '\\')
802 Out << "\\" << (char)C;
808 case '\n': Out << "\\n"; break;
809 case '\t': Out << "\\t"; break;
810 case '\r': Out << "\\r"; break;
811 case '\v': Out << "\\v"; break;
812 case '\a': Out << "\\a"; break;
813 case '\"': Out << "\\\""; break;
814 case '\'': Out << "\\\'"; break;
817 Out << (char)(( C/16 < 10) ? ( C/16 +'0') : ( C/16 -10+'A'));
818 Out << (char)(((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A'));
827 if (CPA->getNumOperands()) {
829 printConstant(cast<Constant>(CPA->getOperand(0)), Static);
830 for (unsigned i = 1, e = CPA->getNumOperands(); i != e; ++i) {
832 printConstant(cast<Constant>(CPA->getOperand(i)), Static);
839 void CWriter::printConstantVector(ConstantVector *CP, bool Static) {
841 if (CP->getNumOperands()) {
843 printConstant(cast<Constant>(CP->getOperand(0)), Static);
844 for (unsigned i = 1, e = CP->getNumOperands(); i != e; ++i) {
846 printConstant(cast<Constant>(CP->getOperand(i)), Static);
852 // isFPCSafeToPrint - Returns true if we may assume that CFP may be written out
853 // textually as a double (rather than as a reference to a stack-allocated
854 // variable). We decide this by converting CFP to a string and back into a
855 // double, and then checking whether the conversion results in a bit-equal
856 // double to the original value of CFP. This depends on us and the target C
857 // compiler agreeing on the conversion process (which is pretty likely since we
858 // only deal in IEEE FP).
860 static bool isFPCSafeToPrint(const ConstantFP *CFP) {
862 // Do long doubles in hex for now.
863 if (CFP->getType() != Type::FloatTy && CFP->getType() != Type::DoubleTy)
865 APFloat APF = APFloat(CFP->getValueAPF()); // copy
866 if (CFP->getType() == Type::FloatTy)
867 APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &ignored);
868 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
870 sprintf(Buffer, "%a", APF.convertToDouble());
871 if (!strncmp(Buffer, "0x", 2) ||
872 !strncmp(Buffer, "-0x", 3) ||
873 !strncmp(Buffer, "+0x", 3))
874 return APF.bitwiseIsEqual(APFloat(atof(Buffer)));
877 std::string StrVal = ftostr(APF);
879 while (StrVal[0] == ' ')
880 StrVal.erase(StrVal.begin());
882 // Check to make sure that the stringized number is not some string like "Inf"
883 // or NaN. Check that the string matches the "[-+]?[0-9]" regex.
884 if ((StrVal[0] >= '0' && StrVal[0] <= '9') ||
885 ((StrVal[0] == '-' || StrVal[0] == '+') &&
886 (StrVal[1] >= '0' && StrVal[1] <= '9')))
887 // Reparse stringized version!
888 return APF.bitwiseIsEqual(APFloat(atof(StrVal.c_str())));
893 /// Print out the casting for a cast operation. This does the double casting
894 /// necessary for conversion to the destination type, if necessary.
895 /// @brief Print a cast
896 void CWriter::printCast(unsigned opc, const Type *SrcTy, const Type *DstTy) {
897 // Print the destination type cast
899 case Instruction::UIToFP:
900 case Instruction::SIToFP:
901 case Instruction::IntToPtr:
902 case Instruction::Trunc:
903 case Instruction::BitCast:
904 case Instruction::FPExt:
905 case Instruction::FPTrunc: // For these the DstTy sign doesn't matter
907 printType(Out, DstTy);
910 case Instruction::ZExt:
911 case Instruction::PtrToInt:
912 case Instruction::FPToUI: // For these, make sure we get an unsigned dest
914 printSimpleType(Out, DstTy, false);
917 case Instruction::SExt:
918 case Instruction::FPToSI: // For these, make sure we get a signed dest
920 printSimpleType(Out, DstTy, true);
924 LLVM_UNREACHABLE("Invalid cast opcode");
927 // Print the source type cast
929 case Instruction::UIToFP:
930 case Instruction::ZExt:
932 printSimpleType(Out, SrcTy, false);
935 case Instruction::SIToFP:
936 case Instruction::SExt:
938 printSimpleType(Out, SrcTy, true);
941 case Instruction::IntToPtr:
942 case Instruction::PtrToInt:
943 // Avoid "cast to pointer from integer of different size" warnings
944 Out << "(unsigned long)";
946 case Instruction::Trunc:
947 case Instruction::BitCast:
948 case Instruction::FPExt:
949 case Instruction::FPTrunc:
950 case Instruction::FPToSI:
951 case Instruction::FPToUI:
952 break; // These don't need a source cast.
954 LLVM_UNREACHABLE("Invalid cast opcode");
959 // printConstant - The LLVM Constant to C Constant converter.
960 void CWriter::printConstant(Constant *CPV, bool Static) {
961 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
962 switch (CE->getOpcode()) {
963 case Instruction::Trunc:
964 case Instruction::ZExt:
965 case Instruction::SExt:
966 case Instruction::FPTrunc:
967 case Instruction::FPExt:
968 case Instruction::UIToFP:
969 case Instruction::SIToFP:
970 case Instruction::FPToUI:
971 case Instruction::FPToSI:
972 case Instruction::PtrToInt:
973 case Instruction::IntToPtr:
974 case Instruction::BitCast:
976 printCast(CE->getOpcode(), CE->getOperand(0)->getType(), CE->getType());
977 if (CE->getOpcode() == Instruction::SExt &&
978 CE->getOperand(0)->getType() == Type::Int1Ty) {
979 // Make sure we really sext from bool here by subtracting from 0
982 printConstant(CE->getOperand(0), Static);
983 if (CE->getType() == Type::Int1Ty &&
984 (CE->getOpcode() == Instruction::Trunc ||
985 CE->getOpcode() == Instruction::FPToUI ||
986 CE->getOpcode() == Instruction::FPToSI ||
987 CE->getOpcode() == Instruction::PtrToInt)) {
988 // Make sure we really truncate to bool here by anding with 1
994 case Instruction::GetElementPtr:
996 printGEPExpression(CE->getOperand(0), gep_type_begin(CPV),
997 gep_type_end(CPV), Static);
1000 case Instruction::Select:
1002 printConstant(CE->getOperand(0), Static);
1004 printConstant(CE->getOperand(1), Static);
1006 printConstant(CE->getOperand(2), Static);
1009 case Instruction::Add:
1010 case Instruction::FAdd:
1011 case Instruction::Sub:
1012 case Instruction::FSub:
1013 case Instruction::Mul:
1014 case Instruction::FMul:
1015 case Instruction::SDiv:
1016 case Instruction::UDiv:
1017 case Instruction::FDiv:
1018 case Instruction::URem:
1019 case Instruction::SRem:
1020 case Instruction::FRem:
1021 case Instruction::And:
1022 case Instruction::Or:
1023 case Instruction::Xor:
1024 case Instruction::ICmp:
1025 case Instruction::Shl:
1026 case Instruction::LShr:
1027 case Instruction::AShr:
1030 bool NeedsClosingParens = printConstExprCast(CE, Static);
1031 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
1032 switch (CE->getOpcode()) {
1033 case Instruction::Add:
1034 case Instruction::FAdd: Out << " + "; break;
1035 case Instruction::Sub:
1036 case Instruction::FSub: Out << " - "; break;
1037 case Instruction::Mul:
1038 case Instruction::FMul: Out << " * "; break;
1039 case Instruction::URem:
1040 case Instruction::SRem:
1041 case Instruction::FRem: Out << " % "; break;
1042 case Instruction::UDiv:
1043 case Instruction::SDiv:
1044 case Instruction::FDiv: Out << " / "; break;
1045 case Instruction::And: Out << " & "; break;
1046 case Instruction::Or: Out << " | "; break;
1047 case Instruction::Xor: Out << " ^ "; break;
1048 case Instruction::Shl: Out << " << "; break;
1049 case Instruction::LShr:
1050 case Instruction::AShr: Out << " >> "; break;
1051 case Instruction::ICmp:
1052 switch (CE->getPredicate()) {
1053 case ICmpInst::ICMP_EQ: Out << " == "; break;
1054 case ICmpInst::ICMP_NE: Out << " != "; break;
1055 case ICmpInst::ICMP_SLT:
1056 case ICmpInst::ICMP_ULT: Out << " < "; break;
1057 case ICmpInst::ICMP_SLE:
1058 case ICmpInst::ICMP_ULE: Out << " <= "; break;
1059 case ICmpInst::ICMP_SGT:
1060 case ICmpInst::ICMP_UGT: Out << " > "; break;
1061 case ICmpInst::ICMP_SGE:
1062 case ICmpInst::ICMP_UGE: Out << " >= "; break;
1063 default: LLVM_UNREACHABLE("Illegal ICmp predicate");
1066 default: LLVM_UNREACHABLE("Illegal opcode here!");
1068 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
1069 if (NeedsClosingParens)
1074 case Instruction::FCmp: {
1076 bool NeedsClosingParens = printConstExprCast(CE, Static);
1077 if (CE->getPredicate() == FCmpInst::FCMP_FALSE)
1079 else if (CE->getPredicate() == FCmpInst::FCMP_TRUE)
1083 switch (CE->getPredicate()) {
1084 default: LLVM_UNREACHABLE("Illegal FCmp predicate");
1085 case FCmpInst::FCMP_ORD: op = "ord"; break;
1086 case FCmpInst::FCMP_UNO: op = "uno"; break;
1087 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
1088 case FCmpInst::FCMP_UNE: op = "une"; break;
1089 case FCmpInst::FCMP_ULT: op = "ult"; break;
1090 case FCmpInst::FCMP_ULE: op = "ule"; break;
1091 case FCmpInst::FCMP_UGT: op = "ugt"; break;
1092 case FCmpInst::FCMP_UGE: op = "uge"; break;
1093 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
1094 case FCmpInst::FCMP_ONE: op = "one"; break;
1095 case FCmpInst::FCMP_OLT: op = "olt"; break;
1096 case FCmpInst::FCMP_OLE: op = "ole"; break;
1097 case FCmpInst::FCMP_OGT: op = "ogt"; break;
1098 case FCmpInst::FCMP_OGE: op = "oge"; break;
1100 Out << "llvm_fcmp_" << op << "(";
1101 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
1103 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
1106 if (NeedsClosingParens)
1113 cerr << "CWriter Error: Unhandled constant expression: "
1118 } else if (isa<UndefValue>(CPV) && CPV->getType()->isSingleValueType()) {
1120 printType(Out, CPV->getType()); // sign doesn't matter
1121 Out << ")/*UNDEF*/";
1122 if (!isa<VectorType>(CPV->getType())) {
1130 if (ConstantInt *CI = dyn_cast<ConstantInt>(CPV)) {
1131 const Type* Ty = CI->getType();
1132 if (Ty == Type::Int1Ty)
1133 Out << (CI->getZExtValue() ? '1' : '0');
1134 else if (Ty == Type::Int32Ty)
1135 Out << CI->getZExtValue() << 'u';
1136 else if (Ty->getPrimitiveSizeInBits() > 32)
1137 Out << CI->getZExtValue() << "ull";
1140 printSimpleType(Out, Ty, false) << ')';
1141 if (CI->isMinValue(true))
1142 Out << CI->getZExtValue() << 'u';
1144 Out << CI->getSExtValue();
1150 switch (CPV->getType()->getTypeID()) {
1151 case Type::FloatTyID:
1152 case Type::DoubleTyID:
1153 case Type::X86_FP80TyID:
1154 case Type::PPC_FP128TyID:
1155 case Type::FP128TyID: {
1156 ConstantFP *FPC = cast<ConstantFP>(CPV);
1157 std::map<const ConstantFP*, unsigned>::iterator I = FPConstantMap.find(FPC);
1158 if (I != FPConstantMap.end()) {
1159 // Because of FP precision problems we must load from a stack allocated
1160 // value that holds the value in hex.
1161 Out << "(*(" << (FPC->getType() == Type::FloatTy ? "float" :
1162 FPC->getType() == Type::DoubleTy ? "double" :
1164 << "*)&FPConstant" << I->second << ')';
1167 if (FPC->getType() == Type::FloatTy)
1168 V = FPC->getValueAPF().convertToFloat();
1169 else if (FPC->getType() == Type::DoubleTy)
1170 V = FPC->getValueAPF().convertToDouble();
1172 // Long double. Convert the number to double, discarding precision.
1173 // This is not awesome, but it at least makes the CBE output somewhat
1175 APFloat Tmp = FPC->getValueAPF();
1177 Tmp.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &LosesInfo);
1178 V = Tmp.convertToDouble();
1184 // FIXME the actual NaN bits should be emitted.
1185 // The prefix for a quiet NaN is 0x7FF8. For a signalling NaN,
1187 const unsigned long QuietNaN = 0x7ff8UL;
1188 //const unsigned long SignalNaN = 0x7ff4UL;
1190 // We need to grab the first part of the FP #
1193 uint64_t ll = DoubleToBits(V);
1194 sprintf(Buffer, "0x%llx", static_cast<long long>(ll));
1196 std::string Num(&Buffer[0], &Buffer[6]);
1197 unsigned long Val = strtoul(Num.c_str(), 0, 16);
1199 if (FPC->getType() == Type::FloatTy)
1200 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "F(\""
1201 << Buffer << "\") /*nan*/ ";
1203 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "(\""
1204 << Buffer << "\") /*nan*/ ";
1205 } else if (IsInf(V)) {
1207 if (V < 0) Out << '-';
1208 Out << "LLVM_INF" << (FPC->getType() == Type::FloatTy ? "F" : "")
1212 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
1213 // Print out the constant as a floating point number.
1215 sprintf(Buffer, "%a", V);
1218 Num = ftostr(FPC->getValueAPF());
1226 case Type::ArrayTyID:
1227 // Use C99 compound expression literal initializer syntax.
1230 printType(Out, CPV->getType());
1233 Out << "{ "; // Arrays are wrapped in struct types.
1234 if (ConstantArray *CA = dyn_cast<ConstantArray>(CPV)) {
1235 printConstantArray(CA, Static);
1237 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1238 const ArrayType *AT = cast<ArrayType>(CPV->getType());
1240 if (AT->getNumElements()) {
1242 Constant *CZ = Context->getNullValue(AT->getElementType());
1243 printConstant(CZ, Static);
1244 for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
1246 printConstant(CZ, Static);
1251 Out << " }"; // Arrays are wrapped in struct types.
1254 case Type::VectorTyID:
1255 // Use C99 compound expression literal initializer syntax.
1258 printType(Out, CPV->getType());
1261 if (ConstantVector *CV = dyn_cast<ConstantVector>(CPV)) {
1262 printConstantVector(CV, Static);
1264 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1265 const VectorType *VT = cast<VectorType>(CPV->getType());
1267 Constant *CZ = Context->getNullValue(VT->getElementType());
1268 printConstant(CZ, Static);
1269 for (unsigned i = 1, e = VT->getNumElements(); i != e; ++i) {
1271 printConstant(CZ, Static);
1277 case Type::StructTyID:
1278 // Use C99 compound expression literal initializer syntax.
1281 printType(Out, CPV->getType());
1284 if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
1285 const StructType *ST = cast<StructType>(CPV->getType());
1287 if (ST->getNumElements()) {
1289 printConstant(Context->getNullValue(ST->getElementType(0)), Static);
1290 for (unsigned i = 1, e = ST->getNumElements(); i != e; ++i) {
1292 printConstant(Context->getNullValue(ST->getElementType(i)), Static);
1298 if (CPV->getNumOperands()) {
1300 printConstant(cast<Constant>(CPV->getOperand(0)), Static);
1301 for (unsigned i = 1, e = CPV->getNumOperands(); i != e; ++i) {
1303 printConstant(cast<Constant>(CPV->getOperand(i)), Static);
1310 case Type::PointerTyID:
1311 if (isa<ConstantPointerNull>(CPV)) {
1313 printType(Out, CPV->getType()); // sign doesn't matter
1314 Out << ")/*NULL*/0)";
1316 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(CPV)) {
1317 writeOperand(GV, Static);
1323 cerr << "Unknown constant type: " << *CPV << "\n";
1329 // Some constant expressions need to be casted back to the original types
1330 // because their operands were casted to the expected type. This function takes
1331 // care of detecting that case and printing the cast for the ConstantExpr.
1332 bool CWriter::printConstExprCast(const ConstantExpr* CE, bool Static) {
1333 bool NeedsExplicitCast = false;
1334 const Type *Ty = CE->getOperand(0)->getType();
1335 bool TypeIsSigned = false;
1336 switch (CE->getOpcode()) {
1337 case Instruction::Add:
1338 case Instruction::Sub:
1339 case Instruction::Mul:
1340 // We need to cast integer arithmetic so that it is always performed
1341 // as unsigned, to avoid undefined behavior on overflow.
1342 case Instruction::LShr:
1343 case Instruction::URem:
1344 case Instruction::UDiv: NeedsExplicitCast = true; break;
1345 case Instruction::AShr:
1346 case Instruction::SRem:
1347 case Instruction::SDiv: NeedsExplicitCast = true; TypeIsSigned = true; break;
1348 case Instruction::SExt:
1350 NeedsExplicitCast = true;
1351 TypeIsSigned = true;
1353 case Instruction::ZExt:
1354 case Instruction::Trunc:
1355 case Instruction::FPTrunc:
1356 case Instruction::FPExt:
1357 case Instruction::UIToFP:
1358 case Instruction::SIToFP:
1359 case Instruction::FPToUI:
1360 case Instruction::FPToSI:
1361 case Instruction::PtrToInt:
1362 case Instruction::IntToPtr:
1363 case Instruction::BitCast:
1365 NeedsExplicitCast = true;
1369 if (NeedsExplicitCast) {
1371 if (Ty->isInteger() && Ty != Type::Int1Ty)
1372 printSimpleType(Out, Ty, TypeIsSigned);
1374 printType(Out, Ty); // not integer, sign doesn't matter
1377 return NeedsExplicitCast;
1380 // Print a constant assuming that it is the operand for a given Opcode. The
1381 // opcodes that care about sign need to cast their operands to the expected
1382 // type before the operation proceeds. This function does the casting.
1383 void CWriter::printConstantWithCast(Constant* CPV, unsigned Opcode) {
1385 // Extract the operand's type, we'll need it.
1386 const Type* OpTy = CPV->getType();
1388 // Indicate whether to do the cast or not.
1389 bool shouldCast = false;
1390 bool typeIsSigned = false;
1392 // Based on the Opcode for which this Constant is being written, determine
1393 // the new type to which the operand should be casted by setting the value
1394 // of OpTy. If we change OpTy, also set shouldCast to true so it gets
1398 // for most instructions, it doesn't matter
1400 case Instruction::Add:
1401 case Instruction::Sub:
1402 case Instruction::Mul:
1403 // We need to cast integer arithmetic so that it is always performed
1404 // as unsigned, to avoid undefined behavior on overflow.
1405 case Instruction::LShr:
1406 case Instruction::UDiv:
1407 case Instruction::URem:
1410 case Instruction::AShr:
1411 case Instruction::SDiv:
1412 case Instruction::SRem:
1414 typeIsSigned = true;
1418 // Write out the casted constant if we should, otherwise just write the
1422 printSimpleType(Out, OpTy, typeIsSigned);
1424 printConstant(CPV, false);
1427 printConstant(CPV, false);
1430 std::string CWriter::GetValueName(const Value *Operand) {
1433 if (!isa<GlobalValue>(Operand) && Operand->getName() != "") {
1434 std::string VarName;
1436 Name = Operand->getName();
1437 VarName.reserve(Name.capacity());
1439 for (std::string::iterator I = Name.begin(), E = Name.end();
1443 if (!((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
1444 (ch >= '0' && ch <= '9') || ch == '_')) {
1446 sprintf(buffer, "_%x_", ch);
1452 Name = "llvm_cbe_" + VarName;
1454 Name = Mang->getValueName(Operand);
1460 /// writeInstComputationInline - Emit the computation for the specified
1461 /// instruction inline, with no destination provided.
1462 void CWriter::writeInstComputationInline(Instruction &I) {
1463 // We can't currently support integer types other than 1, 8, 16, 32, 64.
1465 const Type *Ty = I.getType();
1466 if (Ty->isInteger() && (Ty!=Type::Int1Ty && Ty!=Type::Int8Ty &&
1467 Ty!=Type::Int16Ty && Ty!=Type::Int32Ty && Ty!=Type::Int64Ty)) {
1468 llvm_report_error("The C backend does not currently support integer "
1469 "types of widths other than 1, 8, 16, 32, 64.\n"
1470 "This is being tracked as PR 4158.");
1473 // If this is a non-trivial bool computation, make sure to truncate down to
1474 // a 1 bit value. This is important because we want "add i1 x, y" to return
1475 // "0" when x and y are true, not "2" for example.
1476 bool NeedBoolTrunc = false;
1477 if (I.getType() == Type::Int1Ty && !isa<ICmpInst>(I) && !isa<FCmpInst>(I))
1478 NeedBoolTrunc = true;
1490 void CWriter::writeOperandInternal(Value *Operand, bool Static) {
1491 if (Instruction *I = dyn_cast<Instruction>(Operand))
1492 // Should we inline this instruction to build a tree?
1493 if (isInlinableInst(*I) && !isDirectAlloca(I)) {
1495 writeInstComputationInline(*I);
1500 Constant* CPV = dyn_cast<Constant>(Operand);
1502 if (CPV && !isa<GlobalValue>(CPV))
1503 printConstant(CPV, Static);
1505 Out << GetValueName(Operand);
1508 void CWriter::writeOperand(Value *Operand, bool Static) {
1509 bool isAddressImplicit = isAddressExposed(Operand);
1510 if (isAddressImplicit)
1511 Out << "(&"; // Global variables are referenced as their addresses by llvm
1513 writeOperandInternal(Operand, Static);
1515 if (isAddressImplicit)
1519 // Some instructions need to have their result value casted back to the
1520 // original types because their operands were casted to the expected type.
1521 // This function takes care of detecting that case and printing the cast
1522 // for the Instruction.
1523 bool CWriter::writeInstructionCast(const Instruction &I) {
1524 const Type *Ty = I.getOperand(0)->getType();
1525 switch (I.getOpcode()) {
1526 case Instruction::Add:
1527 case Instruction::Sub:
1528 case Instruction::Mul:
1529 // We need to cast integer arithmetic so that it is always performed
1530 // as unsigned, to avoid undefined behavior on overflow.
1531 case Instruction::LShr:
1532 case Instruction::URem:
1533 case Instruction::UDiv:
1535 printSimpleType(Out, Ty, false);
1538 case Instruction::AShr:
1539 case Instruction::SRem:
1540 case Instruction::SDiv:
1542 printSimpleType(Out, Ty, true);
1550 // Write the operand with a cast to another type based on the Opcode being used.
1551 // This will be used in cases where an instruction has specific type
1552 // requirements (usually signedness) for its operands.
1553 void CWriter::writeOperandWithCast(Value* Operand, unsigned Opcode) {
1555 // Extract the operand's type, we'll need it.
1556 const Type* OpTy = Operand->getType();
1558 // Indicate whether to do the cast or not.
1559 bool shouldCast = false;
1561 // Indicate whether the cast should be to a signed type or not.
1562 bool castIsSigned = false;
1564 // Based on the Opcode for which this Operand is being written, determine
1565 // the new type to which the operand should be casted by setting the value
1566 // of OpTy. If we change OpTy, also set shouldCast to true.
1569 // for most instructions, it doesn't matter
1571 case Instruction::Add:
1572 case Instruction::Sub:
1573 case Instruction::Mul:
1574 // We need to cast integer arithmetic so that it is always performed
1575 // as unsigned, to avoid undefined behavior on overflow.
1576 case Instruction::LShr:
1577 case Instruction::UDiv:
1578 case Instruction::URem: // Cast to unsigned first
1580 castIsSigned = false;
1582 case Instruction::GetElementPtr:
1583 case Instruction::AShr:
1584 case Instruction::SDiv:
1585 case Instruction::SRem: // Cast to signed first
1587 castIsSigned = true;
1591 // Write out the casted operand if we should, otherwise just write the
1595 printSimpleType(Out, OpTy, castIsSigned);
1597 writeOperand(Operand);
1600 writeOperand(Operand);
1603 // Write the operand with a cast to another type based on the icmp predicate
1605 void CWriter::writeOperandWithCast(Value* Operand, const ICmpInst &Cmp) {
1606 // This has to do a cast to ensure the operand has the right signedness.
1607 // Also, if the operand is a pointer, we make sure to cast to an integer when
1608 // doing the comparison both for signedness and so that the C compiler doesn't
1609 // optimize things like "p < NULL" to false (p may contain an integer value
1611 bool shouldCast = Cmp.isRelational();
1613 // Write out the casted operand if we should, otherwise just write the
1616 writeOperand(Operand);
1620 // Should this be a signed comparison? If so, convert to signed.
1621 bool castIsSigned = Cmp.isSignedPredicate();
1623 // If the operand was a pointer, convert to a large integer type.
1624 const Type* OpTy = Operand->getType();
1625 if (isa<PointerType>(OpTy))
1626 OpTy = TD->getIntPtrType();
1629 printSimpleType(Out, OpTy, castIsSigned);
1631 writeOperand(Operand);
1635 // generateCompilerSpecificCode - This is where we add conditional compilation
1636 // directives to cater to specific compilers as need be.
1638 static void generateCompilerSpecificCode(raw_ostream& Out,
1639 const TargetData *TD) {
1640 // Alloca is hard to get, and we don't want to include stdlib.h here.
1641 Out << "/* get a declaration for alloca */\n"
1642 << "#if defined(__CYGWIN__) || defined(__MINGW32__)\n"
1643 << "#define alloca(x) __builtin_alloca((x))\n"
1644 << "#define _alloca(x) __builtin_alloca((x))\n"
1645 << "#elif defined(__APPLE__)\n"
1646 << "extern void *__builtin_alloca(unsigned long);\n"
1647 << "#define alloca(x) __builtin_alloca(x)\n"
1648 << "#define longjmp _longjmp\n"
1649 << "#define setjmp _setjmp\n"
1650 << "#elif defined(__sun__)\n"
1651 << "#if defined(__sparcv9)\n"
1652 << "extern void *__builtin_alloca(unsigned long);\n"
1654 << "extern void *__builtin_alloca(unsigned int);\n"
1656 << "#define alloca(x) __builtin_alloca(x)\n"
1657 << "#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)\n"
1658 << "#define alloca(x) __builtin_alloca(x)\n"
1659 << "#elif defined(_MSC_VER)\n"
1660 << "#define inline _inline\n"
1661 << "#define alloca(x) _alloca(x)\n"
1663 << "#include <alloca.h>\n"
1666 // We output GCC specific attributes to preserve 'linkonce'ness on globals.
1667 // If we aren't being compiled with GCC, just drop these attributes.
1668 Out << "#ifndef __GNUC__ /* Can only support \"linkonce\" vars with GCC */\n"
1669 << "#define __attribute__(X)\n"
1672 // On Mac OS X, "external weak" is spelled "__attribute__((weak_import))".
1673 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1674 << "#define __EXTERNAL_WEAK__ __attribute__((weak_import))\n"
1675 << "#elif defined(__GNUC__)\n"
1676 << "#define __EXTERNAL_WEAK__ __attribute__((weak))\n"
1678 << "#define __EXTERNAL_WEAK__\n"
1681 // For now, turn off the weak linkage attribute on Mac OS X. (See above.)
1682 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1683 << "#define __ATTRIBUTE_WEAK__\n"
1684 << "#elif defined(__GNUC__)\n"
1685 << "#define __ATTRIBUTE_WEAK__ __attribute__((weak))\n"
1687 << "#define __ATTRIBUTE_WEAK__\n"
1690 // Add hidden visibility support. FIXME: APPLE_CC?
1691 Out << "#if defined(__GNUC__)\n"
1692 << "#define __HIDDEN__ __attribute__((visibility(\"hidden\")))\n"
1695 // Define NaN and Inf as GCC builtins if using GCC, as 0 otherwise
1696 // From the GCC documentation:
1698 // double __builtin_nan (const char *str)
1700 // This is an implementation of the ISO C99 function nan.
1702 // Since ISO C99 defines this function in terms of strtod, which we do
1703 // not implement, a description of the parsing is in order. The string is
1704 // parsed as by strtol; that is, the base is recognized by leading 0 or
1705 // 0x prefixes. The number parsed is placed in the significand such that
1706 // the least significant bit of the number is at the least significant
1707 // bit of the significand. The number is truncated to fit the significand
1708 // field provided. The significand is forced to be a quiet NaN.
1710 // This function, if given a string literal, is evaluated early enough
1711 // that it is considered a compile-time constant.
1713 // float __builtin_nanf (const char *str)
1715 // Similar to __builtin_nan, except the return type is float.
1717 // double __builtin_inf (void)
1719 // Similar to __builtin_huge_val, except a warning is generated if the
1720 // target floating-point format does not support infinities. This
1721 // function is suitable for implementing the ISO C99 macro INFINITY.
1723 // float __builtin_inff (void)
1725 // Similar to __builtin_inf, except the return type is float.
1726 Out << "#ifdef __GNUC__\n"
1727 << "#define LLVM_NAN(NanStr) __builtin_nan(NanStr) /* Double */\n"
1728 << "#define LLVM_NANF(NanStr) __builtin_nanf(NanStr) /* Float */\n"
1729 << "#define LLVM_NANS(NanStr) __builtin_nans(NanStr) /* Double */\n"
1730 << "#define LLVM_NANSF(NanStr) __builtin_nansf(NanStr) /* Float */\n"
1731 << "#define LLVM_INF __builtin_inf() /* Double */\n"
1732 << "#define LLVM_INFF __builtin_inff() /* Float */\n"
1733 << "#define LLVM_PREFETCH(addr,rw,locality) "
1734 "__builtin_prefetch(addr,rw,locality)\n"
1735 << "#define __ATTRIBUTE_CTOR__ __attribute__((constructor))\n"
1736 << "#define __ATTRIBUTE_DTOR__ __attribute__((destructor))\n"
1737 << "#define LLVM_ASM __asm__\n"
1739 << "#define LLVM_NAN(NanStr) ((double)0.0) /* Double */\n"
1740 << "#define LLVM_NANF(NanStr) 0.0F /* Float */\n"
1741 << "#define LLVM_NANS(NanStr) ((double)0.0) /* Double */\n"
1742 << "#define LLVM_NANSF(NanStr) 0.0F /* Float */\n"
1743 << "#define LLVM_INF ((double)0.0) /* Double */\n"
1744 << "#define LLVM_INFF 0.0F /* Float */\n"
1745 << "#define LLVM_PREFETCH(addr,rw,locality) /* PREFETCH */\n"
1746 << "#define __ATTRIBUTE_CTOR__\n"
1747 << "#define __ATTRIBUTE_DTOR__\n"
1748 << "#define LLVM_ASM(X)\n"
1751 Out << "#if __GNUC__ < 4 /* Old GCC's, or compilers not GCC */ \n"
1752 << "#define __builtin_stack_save() 0 /* not implemented */\n"
1753 << "#define __builtin_stack_restore(X) /* noop */\n"
1756 // Output typedefs for 128-bit integers. If these are needed with a
1757 // 32-bit target or with a C compiler that doesn't support mode(TI),
1758 // more drastic measures will be needed.
1759 Out << "#if __GNUC__ && __LP64__ /* 128-bit integer types */\n"
1760 << "typedef int __attribute__((mode(TI))) llvmInt128;\n"
1761 << "typedef unsigned __attribute__((mode(TI))) llvmUInt128;\n"
1764 // Output target-specific code that should be inserted into main.
1765 Out << "#define CODE_FOR_MAIN() /* Any target-specific code for main()*/\n";
1768 /// FindStaticTors - Given a static ctor/dtor list, unpack its contents into
1769 /// the StaticTors set.
1770 static void FindStaticTors(GlobalVariable *GV, std::set<Function*> &StaticTors){
1771 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
1772 if (!InitList) return;
1774 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
1775 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
1776 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
1778 if (CS->getOperand(1)->isNullValue())
1779 return; // Found a null terminator, exit printing.
1780 Constant *FP = CS->getOperand(1);
1781 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
1783 FP = CE->getOperand(0);
1784 if (Function *F = dyn_cast<Function>(FP))
1785 StaticTors.insert(F);
1789 enum SpecialGlobalClass {
1791 GlobalCtors, GlobalDtors,
1795 /// getGlobalVariableClass - If this is a global that is specially recognized
1796 /// by LLVM, return a code that indicates how we should handle it.
1797 static SpecialGlobalClass getGlobalVariableClass(const GlobalVariable *GV) {
1798 // If this is a global ctors/dtors list, handle it now.
1799 if (GV->hasAppendingLinkage() && GV->use_empty()) {
1800 if (GV->getName() == "llvm.global_ctors")
1802 else if (GV->getName() == "llvm.global_dtors")
1806 // Otherwise, it it is other metadata, don't print it. This catches things
1807 // like debug information.
1808 if (GV->getSection() == "llvm.metadata")
1815 bool CWriter::doInitialization(Module &M) {
1819 TD = new TargetData(&M);
1820 IL = new IntrinsicLowering(*TD);
1821 IL->AddPrototypes(M);
1823 // Ensure that all structure types have names...
1824 Mang = new Mangler(M);
1825 Mang->markCharUnacceptable('.');
1827 // Keep track of which functions are static ctors/dtors so they can have
1828 // an attribute added to their prototypes.
1829 std::set<Function*> StaticCtors, StaticDtors;
1830 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1832 switch (getGlobalVariableClass(I)) {
1835 FindStaticTors(I, StaticCtors);
1838 FindStaticTors(I, StaticDtors);
1843 // get declaration for alloca
1844 Out << "/* Provide Declarations */\n";
1845 Out << "#include <stdarg.h>\n"; // Varargs support
1846 Out << "#include <setjmp.h>\n"; // Unwind support
1847 generateCompilerSpecificCode(Out, TD);
1849 // Provide a definition for `bool' if not compiling with a C++ compiler.
1851 << "#ifndef __cplusplus\ntypedef unsigned char bool;\n#endif\n"
1853 << "\n\n/* Support for floating point constants */\n"
1854 << "typedef unsigned long long ConstantDoubleTy;\n"
1855 << "typedef unsigned int ConstantFloatTy;\n"
1856 << "typedef struct { unsigned long long f1; unsigned short f2; "
1857 "unsigned short pad[3]; } ConstantFP80Ty;\n"
1858 // This is used for both kinds of 128-bit long double; meaning differs.
1859 << "typedef struct { unsigned long long f1; unsigned long long f2; }"
1860 " ConstantFP128Ty;\n"
1861 << "\n\n/* Global Declarations */\n";
1863 // First output all the declarations for the program, because C requires
1864 // Functions & globals to be declared before they are used.
1867 // Loop over the symbol table, emitting all named constants...
1868 printModuleTypes(M.getTypeSymbolTable());
1870 // Global variable declarations...
1871 if (!M.global_empty()) {
1872 Out << "\n/* External Global Variable Declarations */\n";
1873 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1876 if (I->hasExternalLinkage() || I->hasExternalWeakLinkage() ||
1877 I->hasCommonLinkage())
1879 else if (I->hasDLLImportLinkage())
1880 Out << "__declspec(dllimport) ";
1882 continue; // Internal Global
1884 // Thread Local Storage
1885 if (I->isThreadLocal())
1888 printType(Out, I->getType()->getElementType(), false, GetValueName(I));
1890 if (I->hasExternalWeakLinkage())
1891 Out << " __EXTERNAL_WEAK__";
1896 // Function declarations
1897 Out << "\n/* Function Declarations */\n";
1898 Out << "double fmod(double, double);\n"; // Support for FP rem
1899 Out << "float fmodf(float, float);\n";
1900 Out << "long double fmodl(long double, long double);\n";
1902 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
1903 // Don't print declarations for intrinsic functions.
1904 if (!I->isIntrinsic() && I->getName() != "setjmp" &&
1905 I->getName() != "longjmp" && I->getName() != "_setjmp") {
1906 if (I->hasExternalWeakLinkage())
1908 printFunctionSignature(I, true);
1909 if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
1910 Out << " __ATTRIBUTE_WEAK__";
1911 if (I->hasExternalWeakLinkage())
1912 Out << " __EXTERNAL_WEAK__";
1913 if (StaticCtors.count(I))
1914 Out << " __ATTRIBUTE_CTOR__";
1915 if (StaticDtors.count(I))
1916 Out << " __ATTRIBUTE_DTOR__";
1917 if (I->hasHiddenVisibility())
1918 Out << " __HIDDEN__";
1920 if (I->hasName() && I->getName()[0] == 1)
1921 Out << " LLVM_ASM(\"" << I->getName().c_str()+1 << "\")";
1927 // Output the global variable declarations
1928 if (!M.global_empty()) {
1929 Out << "\n\n/* Global Variable Declarations */\n";
1930 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1932 if (!I->isDeclaration()) {
1933 // Ignore special globals, such as debug info.
1934 if (getGlobalVariableClass(I))
1937 if (I->hasLocalLinkage())
1942 // Thread Local Storage
1943 if (I->isThreadLocal())
1946 printType(Out, I->getType()->getElementType(), false,
1949 if (I->hasLinkOnceLinkage())
1950 Out << " __attribute__((common))";
1951 else if (I->hasCommonLinkage()) // FIXME is this right?
1952 Out << " __ATTRIBUTE_WEAK__";
1953 else if (I->hasWeakLinkage())
1954 Out << " __ATTRIBUTE_WEAK__";
1955 else if (I->hasExternalWeakLinkage())
1956 Out << " __EXTERNAL_WEAK__";
1957 if (I->hasHiddenVisibility())
1958 Out << " __HIDDEN__";
1963 // Output the global variable definitions and contents...
1964 if (!M.global_empty()) {
1965 Out << "\n\n/* Global Variable Definitions and Initialization */\n";
1966 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1968 if (!I->isDeclaration()) {
1969 // Ignore special globals, such as debug info.
1970 if (getGlobalVariableClass(I))
1973 if (I->hasLocalLinkage())
1975 else if (I->hasDLLImportLinkage())
1976 Out << "__declspec(dllimport) ";
1977 else if (I->hasDLLExportLinkage())
1978 Out << "__declspec(dllexport) ";
1980 // Thread Local Storage
1981 if (I->isThreadLocal())
1984 printType(Out, I->getType()->getElementType(), false,
1986 if (I->hasLinkOnceLinkage())
1987 Out << " __attribute__((common))";
1988 else if (I->hasWeakLinkage())
1989 Out << " __ATTRIBUTE_WEAK__";
1990 else if (I->hasCommonLinkage())
1991 Out << " __ATTRIBUTE_WEAK__";
1993 if (I->hasHiddenVisibility())
1994 Out << " __HIDDEN__";
1996 // If the initializer is not null, emit the initializer. If it is null,
1997 // we try to avoid emitting large amounts of zeros. The problem with
1998 // this, however, occurs when the variable has weak linkage. In this
1999 // case, the assembler will complain about the variable being both weak
2000 // and common, so we disable this optimization.
2001 // FIXME common linkage should avoid this problem.
2002 if (!I->getInitializer()->isNullValue()) {
2004 writeOperand(I->getInitializer(), true);
2005 } else if (I->hasWeakLinkage()) {
2006 // We have to specify an initializer, but it doesn't have to be
2007 // complete. If the value is an aggregate, print out { 0 }, and let
2008 // the compiler figure out the rest of the zeros.
2010 if (isa<StructType>(I->getInitializer()->getType()) ||
2011 isa<VectorType>(I->getInitializer()->getType())) {
2013 } else if (isa<ArrayType>(I->getInitializer()->getType())) {
2014 // As with structs and vectors, but with an extra set of braces
2015 // because arrays are wrapped in structs.
2018 // Just print it out normally.
2019 writeOperand(I->getInitializer(), true);
2027 Out << "\n\n/* Function Bodies */\n";
2029 // Emit some helper functions for dealing with FCMP instruction's
2031 Out << "static inline int llvm_fcmp_ord(double X, double Y) { ";
2032 Out << "return X == X && Y == Y; }\n";
2033 Out << "static inline int llvm_fcmp_uno(double X, double Y) { ";
2034 Out << "return X != X || Y != Y; }\n";
2035 Out << "static inline int llvm_fcmp_ueq(double X, double Y) { ";
2036 Out << "return X == Y || llvm_fcmp_uno(X, Y); }\n";
2037 Out << "static inline int llvm_fcmp_une(double X, double Y) { ";
2038 Out << "return X != Y; }\n";
2039 Out << "static inline int llvm_fcmp_ult(double X, double Y) { ";
2040 Out << "return X < Y || llvm_fcmp_uno(X, Y); }\n";
2041 Out << "static inline int llvm_fcmp_ugt(double X, double Y) { ";
2042 Out << "return X > Y || llvm_fcmp_uno(X, Y); }\n";
2043 Out << "static inline int llvm_fcmp_ule(double X, double Y) { ";
2044 Out << "return X <= Y || llvm_fcmp_uno(X, Y); }\n";
2045 Out << "static inline int llvm_fcmp_uge(double X, double Y) { ";
2046 Out << "return X >= Y || llvm_fcmp_uno(X, Y); }\n";
2047 Out << "static inline int llvm_fcmp_oeq(double X, double Y) { ";
2048 Out << "return X == Y ; }\n";
2049 Out << "static inline int llvm_fcmp_one(double X, double Y) { ";
2050 Out << "return X != Y && llvm_fcmp_ord(X, Y); }\n";
2051 Out << "static inline int llvm_fcmp_olt(double X, double Y) { ";
2052 Out << "return X < Y ; }\n";
2053 Out << "static inline int llvm_fcmp_ogt(double X, double Y) { ";
2054 Out << "return X > Y ; }\n";
2055 Out << "static inline int llvm_fcmp_ole(double X, double Y) { ";
2056 Out << "return X <= Y ; }\n";
2057 Out << "static inline int llvm_fcmp_oge(double X, double Y) { ";
2058 Out << "return X >= Y ; }\n";
2063 /// Output all floating point constants that cannot be printed accurately...
2064 void CWriter::printFloatingPointConstants(Function &F) {
2065 // Scan the module for floating point constants. If any FP constant is used
2066 // in the function, we want to redirect it here so that we do not depend on
2067 // the precision of the printed form, unless the printed form preserves
2070 for (constant_iterator I = constant_begin(&F), E = constant_end(&F);
2072 printFloatingPointConstants(*I);
2077 void CWriter::printFloatingPointConstants(const Constant *C) {
2078 // If this is a constant expression, recursively check for constant fp values.
2079 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
2080 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i)
2081 printFloatingPointConstants(CE->getOperand(i));
2085 // Otherwise, check for a FP constant that we need to print.
2086 const ConstantFP *FPC = dyn_cast<ConstantFP>(C);
2088 // Do not put in FPConstantMap if safe.
2089 isFPCSafeToPrint(FPC) ||
2090 // Already printed this constant?
2091 FPConstantMap.count(FPC))
2094 FPConstantMap[FPC] = FPCounter; // Number the FP constants
2096 if (FPC->getType() == Type::DoubleTy) {
2097 double Val = FPC->getValueAPF().convertToDouble();
2098 uint64_t i = FPC->getValueAPF().bitcastToAPInt().getZExtValue();
2099 Out << "static const ConstantDoubleTy FPConstant" << FPCounter++
2100 << " = 0x" << utohexstr(i)
2101 << "ULL; /* " << Val << " */\n";
2102 } else if (FPC->getType() == Type::FloatTy) {
2103 float Val = FPC->getValueAPF().convertToFloat();
2104 uint32_t i = (uint32_t)FPC->getValueAPF().bitcastToAPInt().
2106 Out << "static const ConstantFloatTy FPConstant" << FPCounter++
2107 << " = 0x" << utohexstr(i)
2108 << "U; /* " << Val << " */\n";
2109 } else if (FPC->getType() == Type::X86_FP80Ty) {
2110 // api needed to prevent premature destruction
2111 APInt api = FPC->getValueAPF().bitcastToAPInt();
2112 const uint64_t *p = api.getRawData();
2113 Out << "static const ConstantFP80Ty FPConstant" << FPCounter++
2114 << " = { 0x" << utohexstr(p[0])
2115 << "ULL, 0x" << utohexstr((uint16_t)p[1]) << ",{0,0,0}"
2116 << "}; /* Long double constant */\n";
2117 } else if (FPC->getType() == Type::PPC_FP128Ty) {
2118 APInt api = FPC->getValueAPF().bitcastToAPInt();
2119 const uint64_t *p = api.getRawData();
2120 Out << "static const ConstantFP128Ty FPConstant" << FPCounter++
2122 << utohexstr(p[0]) << ", 0x" << utohexstr(p[1])
2123 << "}; /* Long double constant */\n";
2126 LLVM_UNREACHABLE("Unknown float type!");
2132 /// printSymbolTable - Run through symbol table looking for type names. If a
2133 /// type name is found, emit its declaration...
2135 void CWriter::printModuleTypes(const TypeSymbolTable &TST) {
2136 Out << "/* Helper union for bitcasts */\n";
2137 Out << "typedef union {\n";
2138 Out << " unsigned int Int32;\n";
2139 Out << " unsigned long long Int64;\n";
2140 Out << " float Float;\n";
2141 Out << " double Double;\n";
2142 Out << "} llvmBitCastUnion;\n";
2144 // We are only interested in the type plane of the symbol table.
2145 TypeSymbolTable::const_iterator I = TST.begin();
2146 TypeSymbolTable::const_iterator End = TST.end();
2148 // If there are no type names, exit early.
2149 if (I == End) return;
2151 // Print out forward declarations for structure types before anything else!
2152 Out << "/* Structure forward decls */\n";
2153 for (; I != End; ++I) {
2154 std::string Name = "struct l_" + Mang->makeNameProper(I->first);
2155 Out << Name << ";\n";
2156 TypeNames.insert(std::make_pair(I->second, Name));
2161 // Now we can print out typedefs. Above, we guaranteed that this can only be
2162 // for struct or opaque types.
2163 Out << "/* Typedefs */\n";
2164 for (I = TST.begin(); I != End; ++I) {
2165 std::string Name = "l_" + Mang->makeNameProper(I->first);
2167 printType(Out, I->second, false, Name);
2173 // Keep track of which structures have been printed so far...
2174 std::set<const Type *> StructPrinted;
2176 // Loop over all structures then push them into the stack so they are
2177 // printed in the correct order.
2179 Out << "/* Structure contents */\n";
2180 for (I = TST.begin(); I != End; ++I)
2181 if (isa<StructType>(I->second) || isa<ArrayType>(I->second))
2182 // Only print out used types!
2183 printContainedStructs(I->second, StructPrinted);
2186 // Push the struct onto the stack and recursively push all structs
2187 // this one depends on.
2189 // TODO: Make this work properly with vector types
2191 void CWriter::printContainedStructs(const Type *Ty,
2192 std::set<const Type*> &StructPrinted) {
2193 // Don't walk through pointers.
2194 if (isa<PointerType>(Ty) || Ty->isPrimitiveType() || Ty->isInteger()) return;
2196 // Print all contained types first.
2197 for (Type::subtype_iterator I = Ty->subtype_begin(),
2198 E = Ty->subtype_end(); I != E; ++I)
2199 printContainedStructs(*I, StructPrinted);
2201 if (isa<StructType>(Ty) || isa<ArrayType>(Ty)) {
2202 // Check to see if we have already printed this struct.
2203 if (StructPrinted.insert(Ty).second) {
2204 // Print structure type out.
2205 std::string Name = TypeNames[Ty];
2206 printType(Out, Ty, false, Name, true);
2212 void CWriter::printFunctionSignature(const Function *F, bool Prototype) {
2213 /// isStructReturn - Should this function actually return a struct by-value?
2214 bool isStructReturn = F->hasStructRetAttr();
2216 if (F->hasLocalLinkage()) Out << "static ";
2217 if (F->hasDLLImportLinkage()) Out << "__declspec(dllimport) ";
2218 if (F->hasDLLExportLinkage()) Out << "__declspec(dllexport) ";
2219 switch (F->getCallingConv()) {
2220 case CallingConv::X86_StdCall:
2221 Out << "__attribute__((stdcall)) ";
2223 case CallingConv::X86_FastCall:
2224 Out << "__attribute__((fastcall)) ";
2228 // Loop over the arguments, printing them...
2229 const FunctionType *FT = cast<FunctionType>(F->getFunctionType());
2230 const AttrListPtr &PAL = F->getAttributes();
2232 std::stringstream FunctionInnards;
2234 // Print out the name...
2235 FunctionInnards << GetValueName(F) << '(';
2237 bool PrintedArg = false;
2238 if (!F->isDeclaration()) {
2239 if (!F->arg_empty()) {
2240 Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
2243 // If this is a struct-return function, don't print the hidden
2244 // struct-return argument.
2245 if (isStructReturn) {
2246 assert(I != E && "Invalid struct return function!");
2251 std::string ArgName;
2252 for (; I != E; ++I) {
2253 if (PrintedArg) FunctionInnards << ", ";
2254 if (I->hasName() || !Prototype)
2255 ArgName = GetValueName(I);
2258 const Type *ArgTy = I->getType();
2259 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2260 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2261 ByValParams.insert(I);
2263 printType(FunctionInnards, ArgTy,
2264 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt),
2271 // Loop over the arguments, printing them.
2272 FunctionType::param_iterator I = FT->param_begin(), E = FT->param_end();
2275 // If this is a struct-return function, don't print the hidden
2276 // struct-return argument.
2277 if (isStructReturn) {
2278 assert(I != E && "Invalid struct return function!");
2283 for (; I != E; ++I) {
2284 if (PrintedArg) FunctionInnards << ", ";
2285 const Type *ArgTy = *I;
2286 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2287 assert(isa<PointerType>(ArgTy));
2288 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2290 printType(FunctionInnards, ArgTy,
2291 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt));
2297 // Finish printing arguments... if this is a vararg function, print the ...,
2298 // unless there are no known types, in which case, we just emit ().
2300 if (FT->isVarArg() && PrintedArg) {
2301 if (PrintedArg) FunctionInnards << ", ";
2302 FunctionInnards << "..."; // Output varargs portion of signature!
2303 } else if (!FT->isVarArg() && !PrintedArg) {
2304 FunctionInnards << "void"; // ret() -> ret(void) in C.
2306 FunctionInnards << ')';
2308 // Get the return tpe for the function.
2310 if (!isStructReturn)
2311 RetTy = F->getReturnType();
2313 // If this is a struct-return function, print the struct-return type.
2314 RetTy = cast<PointerType>(FT->getParamType(0))->getElementType();
2317 // Print out the return type and the signature built above.
2318 printType(Out, RetTy,
2319 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt),
2320 FunctionInnards.str());
2323 static inline bool isFPIntBitCast(const Instruction &I) {
2324 if (!isa<BitCastInst>(I))
2326 const Type *SrcTy = I.getOperand(0)->getType();
2327 const Type *DstTy = I.getType();
2328 return (SrcTy->isFloatingPoint() && DstTy->isInteger()) ||
2329 (DstTy->isFloatingPoint() && SrcTy->isInteger());
2332 void CWriter::printFunction(Function &F) {
2333 /// isStructReturn - Should this function actually return a struct by-value?
2334 bool isStructReturn = F.hasStructRetAttr();
2336 printFunctionSignature(&F, false);
2339 // If this is a struct return function, handle the result with magic.
2340 if (isStructReturn) {
2341 const Type *StructTy =
2342 cast<PointerType>(F.arg_begin()->getType())->getElementType();
2344 printType(Out, StructTy, false, "StructReturn");
2345 Out << "; /* Struct return temporary */\n";
2348 printType(Out, F.arg_begin()->getType(), false,
2349 GetValueName(F.arg_begin()));
2350 Out << " = &StructReturn;\n";
2353 bool PrintedVar = false;
2355 // print local variable information for the function
2356 for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I) {
2357 if (const AllocaInst *AI = isDirectAlloca(&*I)) {
2359 printType(Out, AI->getAllocatedType(), false, GetValueName(AI));
2360 Out << "; /* Address-exposed local */\n";
2362 } else if (I->getType() != Type::VoidTy && !isInlinableInst(*I)) {
2364 printType(Out, I->getType(), false, GetValueName(&*I));
2367 if (isa<PHINode>(*I)) { // Print out PHI node temporaries as well...
2369 printType(Out, I->getType(), false,
2370 GetValueName(&*I)+"__PHI_TEMPORARY");
2375 // We need a temporary for the BitCast to use so it can pluck a value out
2376 // of a union to do the BitCast. This is separate from the need for a
2377 // variable to hold the result of the BitCast.
2378 if (isFPIntBitCast(*I)) {
2379 Out << " llvmBitCastUnion " << GetValueName(&*I)
2380 << "__BITCAST_TEMPORARY;\n";
2388 if (F.hasExternalLinkage() && F.getName() == "main")
2389 Out << " CODE_FOR_MAIN();\n";
2391 // print the basic blocks
2392 for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
2393 if (Loop *L = LI->getLoopFor(BB)) {
2394 if (L->getHeader() == BB && L->getParentLoop() == 0)
2397 printBasicBlock(BB);
2404 void CWriter::printLoop(Loop *L) {
2405 Out << " do { /* Syntactic loop '" << L->getHeader()->getName()
2406 << "' to make GCC happy */\n";
2407 for (unsigned i = 0, e = L->getBlocks().size(); i != e; ++i) {
2408 BasicBlock *BB = L->getBlocks()[i];
2409 Loop *BBLoop = LI->getLoopFor(BB);
2411 printBasicBlock(BB);
2412 else if (BB == BBLoop->getHeader() && BBLoop->getParentLoop() == L)
2415 Out << " } while (1); /* end of syntactic loop '"
2416 << L->getHeader()->getName() << "' */\n";
2419 void CWriter::printBasicBlock(BasicBlock *BB) {
2421 // Don't print the label for the basic block if there are no uses, or if
2422 // the only terminator use is the predecessor basic block's terminator.
2423 // We have to scan the use list because PHI nodes use basic blocks too but
2424 // do not require a label to be generated.
2426 bool NeedsLabel = false;
2427 for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI)
2428 if (isGotoCodeNecessary(*PI, BB)) {
2433 if (NeedsLabel) Out << GetValueName(BB) << ":\n";
2435 // Output all of the instructions in the basic block...
2436 for (BasicBlock::iterator II = BB->begin(), E = --BB->end(); II != E;
2438 if (!isInlinableInst(*II) && !isDirectAlloca(II)) {
2439 if (II->getType() != Type::VoidTy && !isInlineAsm(*II))
2443 writeInstComputationInline(*II);
2448 // Don't emit prefix or suffix for the terminator.
2449 visit(*BB->getTerminator());
2453 // Specific Instruction type classes... note that all of the casts are
2454 // necessary because we use the instruction classes as opaque types...
2456 void CWriter::visitReturnInst(ReturnInst &I) {
2457 // If this is a struct return function, return the temporary struct.
2458 bool isStructReturn = I.getParent()->getParent()->hasStructRetAttr();
2460 if (isStructReturn) {
2461 Out << " return StructReturn;\n";
2465 // Don't output a void return if this is the last basic block in the function
2466 if (I.getNumOperands() == 0 &&
2467 &*--I.getParent()->getParent()->end() == I.getParent() &&
2468 !I.getParent()->size() == 1) {
2472 if (I.getNumOperands() > 1) {
2475 printType(Out, I.getParent()->getParent()->getReturnType());
2476 Out << " llvm_cbe_mrv_temp = {\n";
2477 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
2479 writeOperand(I.getOperand(i));
2485 Out << " return llvm_cbe_mrv_temp;\n";
2491 if (I.getNumOperands()) {
2493 writeOperand(I.getOperand(0));
2498 void CWriter::visitSwitchInst(SwitchInst &SI) {
2501 writeOperand(SI.getOperand(0));
2502 Out << ") {\n default:\n";
2503 printPHICopiesForSuccessor (SI.getParent(), SI.getDefaultDest(), 2);
2504 printBranchToBlock(SI.getParent(), SI.getDefaultDest(), 2);
2506 for (unsigned i = 2, e = SI.getNumOperands(); i != e; i += 2) {
2508 writeOperand(SI.getOperand(i));
2510 BasicBlock *Succ = cast<BasicBlock>(SI.getOperand(i+1));
2511 printPHICopiesForSuccessor (SI.getParent(), Succ, 2);
2512 printBranchToBlock(SI.getParent(), Succ, 2);
2513 if (Function::iterator(Succ) == next(Function::iterator(SI.getParent())))
2519 void CWriter::visitUnreachableInst(UnreachableInst &I) {
2520 Out << " /*UNREACHABLE*/;\n";
2523 bool CWriter::isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
2524 /// FIXME: This should be reenabled, but loop reordering safe!!
2527 if (next(Function::iterator(From)) != Function::iterator(To))
2528 return true; // Not the direct successor, we need a goto.
2530 //isa<SwitchInst>(From->getTerminator())
2532 if (LI->getLoopFor(From) != LI->getLoopFor(To))
2537 void CWriter::printPHICopiesForSuccessor (BasicBlock *CurBlock,
2538 BasicBlock *Successor,
2540 for (BasicBlock::iterator I = Successor->begin(); isa<PHINode>(I); ++I) {
2541 PHINode *PN = cast<PHINode>(I);
2542 // Now we have to do the printing.
2543 Value *IV = PN->getIncomingValueForBlock(CurBlock);
2544 if (!isa<UndefValue>(IV)) {
2545 Out << std::string(Indent, ' ');
2546 Out << " " << GetValueName(I) << "__PHI_TEMPORARY = ";
2548 Out << "; /* for PHI node */\n";
2553 void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
2555 if (isGotoCodeNecessary(CurBB, Succ)) {
2556 Out << std::string(Indent, ' ') << " goto ";
2562 // Branch instruction printing - Avoid printing out a branch to a basic block
2563 // that immediately succeeds the current one.
2565 void CWriter::visitBranchInst(BranchInst &I) {
2567 if (I.isConditional()) {
2568 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(0))) {
2570 writeOperand(I.getCondition());
2573 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 2);
2574 printBranchToBlock(I.getParent(), I.getSuccessor(0), 2);
2576 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(1))) {
2577 Out << " } else {\n";
2578 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2579 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2582 // First goto not necessary, assume second one is...
2584 writeOperand(I.getCondition());
2587 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2588 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2593 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 0);
2594 printBranchToBlock(I.getParent(), I.getSuccessor(0), 0);
2599 // PHI nodes get copied into temporary values at the end of predecessor basic
2600 // blocks. We now need to copy these temporary values into the REAL value for
2602 void CWriter::visitPHINode(PHINode &I) {
2604 Out << "__PHI_TEMPORARY";
2608 void CWriter::visitBinaryOperator(Instruction &I) {
2609 // binary instructions, shift instructions, setCond instructions.
2610 assert(!isa<PointerType>(I.getType()));
2612 // We must cast the results of binary operations which might be promoted.
2613 bool needsCast = false;
2614 if ((I.getType() == Type::Int8Ty) || (I.getType() == Type::Int16Ty)
2615 || (I.getType() == Type::FloatTy)) {
2618 printType(Out, I.getType(), false);
2622 // If this is a negation operation, print it out as such. For FP, we don't
2623 // want to print "-0.0 - X".
2624 if (BinaryOperator::isNeg(&I)) {
2626 writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
2628 } else if (BinaryOperator::isFNeg(&I)) {
2630 writeOperand(BinaryOperator::getFNegArgument(cast<BinaryOperator>(&I)));
2632 } else if (I.getOpcode() == Instruction::FRem) {
2633 // Output a call to fmod/fmodf instead of emitting a%b
2634 if (I.getType() == Type::FloatTy)
2636 else if (I.getType() == Type::DoubleTy)
2638 else // all 3 flavors of long double
2640 writeOperand(I.getOperand(0));
2642 writeOperand(I.getOperand(1));
2646 // Write out the cast of the instruction's value back to the proper type
2648 bool NeedsClosingParens = writeInstructionCast(I);
2650 // Certain instructions require the operand to be forced to a specific type
2651 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2652 // below for operand 1
2653 writeOperandWithCast(I.getOperand(0), I.getOpcode());
2655 switch (I.getOpcode()) {
2656 case Instruction::Add:
2657 case Instruction::FAdd: Out << " + "; break;
2658 case Instruction::Sub:
2659 case Instruction::FSub: Out << " - "; break;
2660 case Instruction::Mul:
2661 case Instruction::FMul: Out << " * "; break;
2662 case Instruction::URem:
2663 case Instruction::SRem:
2664 case Instruction::FRem: Out << " % "; break;
2665 case Instruction::UDiv:
2666 case Instruction::SDiv:
2667 case Instruction::FDiv: Out << " / "; break;
2668 case Instruction::And: Out << " & "; break;
2669 case Instruction::Or: Out << " | "; break;
2670 case Instruction::Xor: Out << " ^ "; break;
2671 case Instruction::Shl : Out << " << "; break;
2672 case Instruction::LShr:
2673 case Instruction::AShr: Out << " >> "; break;
2676 cerr << "Invalid operator type!" << I;
2681 writeOperandWithCast(I.getOperand(1), I.getOpcode());
2682 if (NeedsClosingParens)
2691 void CWriter::visitICmpInst(ICmpInst &I) {
2692 // We must cast the results of icmp which might be promoted.
2693 bool needsCast = false;
2695 // Write out the cast of the instruction's value back to the proper type
2697 bool NeedsClosingParens = writeInstructionCast(I);
2699 // Certain icmp predicate require the operand to be forced to a specific type
2700 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2701 // below for operand 1
2702 writeOperandWithCast(I.getOperand(0), I);
2704 switch (I.getPredicate()) {
2705 case ICmpInst::ICMP_EQ: Out << " == "; break;
2706 case ICmpInst::ICMP_NE: Out << " != "; break;
2707 case ICmpInst::ICMP_ULE:
2708 case ICmpInst::ICMP_SLE: Out << " <= "; break;
2709 case ICmpInst::ICMP_UGE:
2710 case ICmpInst::ICMP_SGE: Out << " >= "; break;
2711 case ICmpInst::ICMP_ULT:
2712 case ICmpInst::ICMP_SLT: Out << " < "; break;
2713 case ICmpInst::ICMP_UGT:
2714 case ICmpInst::ICMP_SGT: Out << " > "; break;
2717 cerr << "Invalid icmp predicate!" << I;
2722 writeOperandWithCast(I.getOperand(1), I);
2723 if (NeedsClosingParens)
2731 void CWriter::visitFCmpInst(FCmpInst &I) {
2732 if (I.getPredicate() == FCmpInst::FCMP_FALSE) {
2736 if (I.getPredicate() == FCmpInst::FCMP_TRUE) {
2742 switch (I.getPredicate()) {
2743 default: LLVM_UNREACHABLE("Illegal FCmp predicate");
2744 case FCmpInst::FCMP_ORD: op = "ord"; break;
2745 case FCmpInst::FCMP_UNO: op = "uno"; break;
2746 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
2747 case FCmpInst::FCMP_UNE: op = "une"; break;
2748 case FCmpInst::FCMP_ULT: op = "ult"; break;
2749 case FCmpInst::FCMP_ULE: op = "ule"; break;
2750 case FCmpInst::FCMP_UGT: op = "ugt"; break;
2751 case FCmpInst::FCMP_UGE: op = "uge"; break;
2752 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
2753 case FCmpInst::FCMP_ONE: op = "one"; break;
2754 case FCmpInst::FCMP_OLT: op = "olt"; break;
2755 case FCmpInst::FCMP_OLE: op = "ole"; break;
2756 case FCmpInst::FCMP_OGT: op = "ogt"; break;
2757 case FCmpInst::FCMP_OGE: op = "oge"; break;
2760 Out << "llvm_fcmp_" << op << "(";
2761 // Write the first operand
2762 writeOperand(I.getOperand(0));
2764 // Write the second operand
2765 writeOperand(I.getOperand(1));
2769 static const char * getFloatBitCastField(const Type *Ty) {
2770 switch (Ty->getTypeID()) {
2771 default: LLVM_UNREACHABLE("Invalid Type");
2772 case Type::FloatTyID: return "Float";
2773 case Type::DoubleTyID: return "Double";
2774 case Type::IntegerTyID: {
2775 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
2784 void CWriter::visitCastInst(CastInst &I) {
2785 const Type *DstTy = I.getType();
2786 const Type *SrcTy = I.getOperand(0)->getType();
2787 if (isFPIntBitCast(I)) {
2789 // These int<->float and long<->double casts need to be handled specially
2790 Out << GetValueName(&I) << "__BITCAST_TEMPORARY."
2791 << getFloatBitCastField(I.getOperand(0)->getType()) << " = ";
2792 writeOperand(I.getOperand(0));
2793 Out << ", " << GetValueName(&I) << "__BITCAST_TEMPORARY."
2794 << getFloatBitCastField(I.getType());
2800 printCast(I.getOpcode(), SrcTy, DstTy);
2802 // Make a sext from i1 work by subtracting the i1 from 0 (an int).
2803 if (SrcTy == Type::Int1Ty && I.getOpcode() == Instruction::SExt)
2806 writeOperand(I.getOperand(0));
2808 if (DstTy == Type::Int1Ty &&
2809 (I.getOpcode() == Instruction::Trunc ||
2810 I.getOpcode() == Instruction::FPToUI ||
2811 I.getOpcode() == Instruction::FPToSI ||
2812 I.getOpcode() == Instruction::PtrToInt)) {
2813 // Make sure we really get a trunc to bool by anding the operand with 1
2819 void CWriter::visitSelectInst(SelectInst &I) {
2821 writeOperand(I.getCondition());
2823 writeOperand(I.getTrueValue());
2825 writeOperand(I.getFalseValue());
2830 void CWriter::lowerIntrinsics(Function &F) {
2831 // This is used to keep track of intrinsics that get generated to a lowered
2832 // function. We must generate the prototypes before the function body which
2833 // will only be expanded on first use (by the loop below).
2834 std::vector<Function*> prototypesToGen;
2836 // Examine all the instructions in this function to find the intrinsics that
2837 // need to be lowered.
2838 for (Function::iterator BB = F.begin(), EE = F.end(); BB != EE; ++BB)
2839 for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; )
2840 if (CallInst *CI = dyn_cast<CallInst>(I++))
2841 if (Function *F = CI->getCalledFunction())
2842 switch (F->getIntrinsicID()) {
2843 case Intrinsic::not_intrinsic:
2844 case Intrinsic::memory_barrier:
2845 case Intrinsic::vastart:
2846 case Intrinsic::vacopy:
2847 case Intrinsic::vaend:
2848 case Intrinsic::returnaddress:
2849 case Intrinsic::frameaddress:
2850 case Intrinsic::setjmp:
2851 case Intrinsic::longjmp:
2852 case Intrinsic::prefetch:
2853 case Intrinsic::dbg_stoppoint:
2854 case Intrinsic::powi:
2855 case Intrinsic::x86_sse_cmp_ss:
2856 case Intrinsic::x86_sse_cmp_ps:
2857 case Intrinsic::x86_sse2_cmp_sd:
2858 case Intrinsic::x86_sse2_cmp_pd:
2859 case Intrinsic::ppc_altivec_lvsl:
2860 // We directly implement these intrinsics
2863 // If this is an intrinsic that directly corresponds to a GCC
2864 // builtin, we handle it.
2865 const char *BuiltinName = "";
2866 #define GET_GCC_BUILTIN_NAME
2867 #include "llvm/Intrinsics.gen"
2868 #undef GET_GCC_BUILTIN_NAME
2869 // If we handle it, don't lower it.
2870 if (BuiltinName[0]) break;
2872 // All other intrinsic calls we must lower.
2873 Instruction *Before = 0;
2874 if (CI != &BB->front())
2875 Before = prior(BasicBlock::iterator(CI));
2877 IL->LowerIntrinsicCall(CI);
2878 if (Before) { // Move iterator to instruction after call
2883 // If the intrinsic got lowered to another call, and that call has
2884 // a definition then we need to make sure its prototype is emitted
2885 // before any calls to it.
2886 if (CallInst *Call = dyn_cast<CallInst>(I))
2887 if (Function *NewF = Call->getCalledFunction())
2888 if (!NewF->isDeclaration())
2889 prototypesToGen.push_back(NewF);
2894 // We may have collected some prototypes to emit in the loop above.
2895 // Emit them now, before the function that uses them is emitted. But,
2896 // be careful not to emit them twice.
2897 std::vector<Function*>::iterator I = prototypesToGen.begin();
2898 std::vector<Function*>::iterator E = prototypesToGen.end();
2899 for ( ; I != E; ++I) {
2900 if (intrinsicPrototypesAlreadyGenerated.insert(*I).second) {
2902 printFunctionSignature(*I, true);
2908 void CWriter::visitCallInst(CallInst &I) {
2909 if (isa<InlineAsm>(I.getOperand(0)))
2910 return visitInlineAsm(I);
2912 bool WroteCallee = false;
2914 // Handle intrinsic function calls first...
2915 if (Function *F = I.getCalledFunction())
2916 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
2917 if (visitBuiltinCall(I, ID, WroteCallee))
2920 Value *Callee = I.getCalledValue();
2922 const PointerType *PTy = cast<PointerType>(Callee->getType());
2923 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
2925 // If this is a call to a struct-return function, assign to the first
2926 // parameter instead of passing it to the call.
2927 const AttrListPtr &PAL = I.getAttributes();
2928 bool hasByVal = I.hasByValArgument();
2929 bool isStructRet = I.hasStructRetAttr();
2931 writeOperandDeref(I.getOperand(1));
2935 if (I.isTailCall()) Out << " /*tail*/ ";
2938 // If this is an indirect call to a struct return function, we need to cast
2939 // the pointer. Ditto for indirect calls with byval arguments.
2940 bool NeedsCast = (hasByVal || isStructRet) && !isa<Function>(Callee);
2942 // GCC is a real PITA. It does not permit codegening casts of functions to
2943 // function pointers if they are in a call (it generates a trap instruction
2944 // instead!). We work around this by inserting a cast to void* in between
2945 // the function and the function pointer cast. Unfortunately, we can't just
2946 // form the constant expression here, because the folder will immediately
2949 // Note finally, that this is completely unsafe. ANSI C does not guarantee
2950 // that void* and function pointers have the same size. :( To deal with this
2951 // in the common case, we handle casts where the number of arguments passed
2954 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Callee))
2956 if (Function *RF = dyn_cast<Function>(CE->getOperand(0))) {
2962 // Ok, just cast the pointer type.
2965 printStructReturnPointerFunctionType(Out, PAL,
2966 cast<PointerType>(I.getCalledValue()->getType()));
2968 printType(Out, I.getCalledValue()->getType(), false, "", true, PAL);
2970 printType(Out, I.getCalledValue()->getType());
2973 writeOperand(Callee);
2974 if (NeedsCast) Out << ')';
2979 unsigned NumDeclaredParams = FTy->getNumParams();
2981 CallSite::arg_iterator AI = I.op_begin()+1, AE = I.op_end();
2983 if (isStructRet) { // Skip struct return argument.
2988 bool PrintedArg = false;
2989 for (; AI != AE; ++AI, ++ArgNo) {
2990 if (PrintedArg) Out << ", ";
2991 if (ArgNo < NumDeclaredParams &&
2992 (*AI)->getType() != FTy->getParamType(ArgNo)) {
2994 printType(Out, FTy->getParamType(ArgNo),
2995 /*isSigned=*/PAL.paramHasAttr(ArgNo+1, Attribute::SExt));
2998 // Check if the argument is expected to be passed by value.
2999 if (I.paramHasAttr(ArgNo+1, Attribute::ByVal))
3000 writeOperandDeref(*AI);
3008 /// visitBuiltinCall - Handle the call to the specified builtin. Returns true
3009 /// if the entire call is handled, return false it it wasn't handled, and
3010 /// optionally set 'WroteCallee' if the callee has already been printed out.
3011 bool CWriter::visitBuiltinCall(CallInst &I, Intrinsic::ID ID,
3012 bool &WroteCallee) {
3015 // If this is an intrinsic that directly corresponds to a GCC
3016 // builtin, we emit it here.
3017 const char *BuiltinName = "";
3018 Function *F = I.getCalledFunction();
3019 #define GET_GCC_BUILTIN_NAME
3020 #include "llvm/Intrinsics.gen"
3021 #undef GET_GCC_BUILTIN_NAME
3022 assert(BuiltinName[0] && "Unknown LLVM intrinsic!");
3028 case Intrinsic::memory_barrier:
3029 Out << "__sync_synchronize()";
3031 case Intrinsic::vastart:
3034 Out << "va_start(*(va_list*)";
3035 writeOperand(I.getOperand(1));
3037 // Output the last argument to the enclosing function.
3038 if (I.getParent()->getParent()->arg_empty()) {
3040 raw_string_ostream Msg(msg);
3041 Msg << "The C backend does not currently support zero "
3042 << "argument varargs functions, such as '"
3043 << I.getParent()->getParent()->getName() << "'!";
3044 llvm_report_error(Msg.str());
3046 writeOperand(--I.getParent()->getParent()->arg_end());
3049 case Intrinsic::vaend:
3050 if (!isa<ConstantPointerNull>(I.getOperand(1))) {
3051 Out << "0; va_end(*(va_list*)";
3052 writeOperand(I.getOperand(1));
3055 Out << "va_end(*(va_list*)0)";
3058 case Intrinsic::vacopy:
3060 Out << "va_copy(*(va_list*)";
3061 writeOperand(I.getOperand(1));
3062 Out << ", *(va_list*)";
3063 writeOperand(I.getOperand(2));
3066 case Intrinsic::returnaddress:
3067 Out << "__builtin_return_address(";
3068 writeOperand(I.getOperand(1));
3071 case Intrinsic::frameaddress:
3072 Out << "__builtin_frame_address(";
3073 writeOperand(I.getOperand(1));
3076 case Intrinsic::powi:
3077 Out << "__builtin_powi(";
3078 writeOperand(I.getOperand(1));
3080 writeOperand(I.getOperand(2));
3083 case Intrinsic::setjmp:
3084 Out << "setjmp(*(jmp_buf*)";
3085 writeOperand(I.getOperand(1));
3088 case Intrinsic::longjmp:
3089 Out << "longjmp(*(jmp_buf*)";
3090 writeOperand(I.getOperand(1));
3092 writeOperand(I.getOperand(2));
3095 case Intrinsic::prefetch:
3096 Out << "LLVM_PREFETCH((const void *)";
3097 writeOperand(I.getOperand(1));
3099 writeOperand(I.getOperand(2));
3101 writeOperand(I.getOperand(3));
3104 case Intrinsic::stacksave:
3105 // Emit this as: Val = 0; *((void**)&Val) = __builtin_stack_save()
3106 // to work around GCC bugs (see PR1809).
3107 Out << "0; *((void**)&" << GetValueName(&I)
3108 << ") = __builtin_stack_save()";
3110 case Intrinsic::dbg_stoppoint: {
3111 // If we use writeOperand directly we get a "u" suffix which is rejected
3113 std::stringstream SPIStr;
3114 DbgStopPointInst &SPI = cast<DbgStopPointInst>(I);
3115 SPI.getDirectory()->print(SPIStr);
3119 Out << SPIStr.str();
3121 SPI.getFileName()->print(SPIStr);
3122 Out << SPIStr.str() << "\"\n";
3125 case Intrinsic::x86_sse_cmp_ss:
3126 case Intrinsic::x86_sse_cmp_ps:
3127 case Intrinsic::x86_sse2_cmp_sd:
3128 case Intrinsic::x86_sse2_cmp_pd:
3130 printType(Out, I.getType());
3132 // Multiple GCC builtins multiplex onto this intrinsic.
3133 switch (cast<ConstantInt>(I.getOperand(3))->getZExtValue()) {
3134 default: LLVM_UNREACHABLE("Invalid llvm.x86.sse.cmp!");
3135 case 0: Out << "__builtin_ia32_cmpeq"; break;
3136 case 1: Out << "__builtin_ia32_cmplt"; break;
3137 case 2: Out << "__builtin_ia32_cmple"; break;
3138 case 3: Out << "__builtin_ia32_cmpunord"; break;
3139 case 4: Out << "__builtin_ia32_cmpneq"; break;
3140 case 5: Out << "__builtin_ia32_cmpnlt"; break;
3141 case 6: Out << "__builtin_ia32_cmpnle"; break;
3142 case 7: Out << "__builtin_ia32_cmpord"; break;
3144 if (ID == Intrinsic::x86_sse_cmp_ps || ID == Intrinsic::x86_sse2_cmp_pd)
3148 if (ID == Intrinsic::x86_sse_cmp_ss || ID == Intrinsic::x86_sse_cmp_ps)
3154 writeOperand(I.getOperand(1));
3156 writeOperand(I.getOperand(2));
3159 case Intrinsic::ppc_altivec_lvsl:
3161 printType(Out, I.getType());
3163 Out << "__builtin_altivec_lvsl(0, (void*)";
3164 writeOperand(I.getOperand(1));
3170 //This converts the llvm constraint string to something gcc is expecting.
3171 //TODO: work out platform independent constraints and factor those out
3172 // of the per target tables
3173 // handle multiple constraint codes
3174 std::string CWriter::InterpretASMConstraint(InlineAsm::ConstraintInfo& c) {
3176 assert(c.Codes.size() == 1 && "Too many asm constraint codes to handle");
3178 const char *const *table = 0;
3180 //Grab the translation table from TargetAsmInfo if it exists
3183 const TargetMachineRegistry::entry* Match =
3184 TargetMachineRegistry::getClosestStaticTargetForModule(*TheModule, E);
3186 //Per platform Target Machines don't exist, so create it
3187 // this must be done only once
3188 const TargetMachine* TM = Match->CtorFn(*TheModule, "");
3189 TAsm = TM->getTargetAsmInfo();
3193 table = TAsm->getAsmCBE();
3195 //Search the translation table if it exists
3196 for (int i = 0; table && table[i]; i += 2)
3197 if (c.Codes[0] == table[i])
3200 //default is identity
3204 //TODO: import logic from AsmPrinter.cpp
3205 static std::string gccifyAsm(std::string asmstr) {
3206 for (std::string::size_type i = 0; i != asmstr.size(); ++i)
3207 if (asmstr[i] == '\n')
3208 asmstr.replace(i, 1, "\\n");
3209 else if (asmstr[i] == '\t')
3210 asmstr.replace(i, 1, "\\t");
3211 else if (asmstr[i] == '$') {
3212 if (asmstr[i + 1] == '{') {
3213 std::string::size_type a = asmstr.find_first_of(':', i + 1);
3214 std::string::size_type b = asmstr.find_first_of('}', i + 1);
3215 std::string n = "%" +
3216 asmstr.substr(a + 1, b - a - 1) +
3217 asmstr.substr(i + 2, a - i - 2);
3218 asmstr.replace(i, b - i + 1, n);
3221 asmstr.replace(i, 1, "%");
3223 else if (asmstr[i] == '%')//grr
3224 { asmstr.replace(i, 1, "%%"); ++i;}
3229 //TODO: assumptions about what consume arguments from the call are likely wrong
3230 // handle communitivity
3231 void CWriter::visitInlineAsm(CallInst &CI) {
3232 InlineAsm* as = cast<InlineAsm>(CI.getOperand(0));
3233 std::vector<InlineAsm::ConstraintInfo> Constraints = as->ParseConstraints();
3235 std::vector<std::pair<Value*, int> > ResultVals;
3236 if (CI.getType() == Type::VoidTy)
3238 else if (const StructType *ST = dyn_cast<StructType>(CI.getType())) {
3239 for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i)
3240 ResultVals.push_back(std::make_pair(&CI, (int)i));
3242 ResultVals.push_back(std::make_pair(&CI, -1));
3245 // Fix up the asm string for gcc and emit it.
3246 Out << "__asm__ volatile (\"" << gccifyAsm(as->getAsmString()) << "\"\n";
3249 unsigned ValueCount = 0;
3250 bool IsFirst = true;
3252 // Convert over all the output constraints.
3253 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3254 E = Constraints.end(); I != E; ++I) {
3256 if (I->Type != InlineAsm::isOutput) {
3258 continue; // Ignore non-output constraints.
3261 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3262 std::string C = InterpretASMConstraint(*I);
3263 if (C.empty()) continue;
3274 if (ValueCount < ResultVals.size()) {
3275 DestVal = ResultVals[ValueCount].first;
3276 DestValNo = ResultVals[ValueCount].second;
3278 DestVal = CI.getOperand(ValueCount-ResultVals.size()+1);
3280 if (I->isEarlyClobber)
3283 Out << "\"=" << C << "\"(" << GetValueName(DestVal);
3284 if (DestValNo != -1)
3285 Out << ".field" << DestValNo; // Multiple retvals.
3291 // Convert over all the input constraints.
3295 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3296 E = Constraints.end(); I != E; ++I) {
3297 if (I->Type != InlineAsm::isInput) {
3299 continue; // Ignore non-input constraints.
3302 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3303 std::string C = InterpretASMConstraint(*I);
3304 if (C.empty()) continue;
3311 assert(ValueCount >= ResultVals.size() && "Input can't refer to result");
3312 Value *SrcVal = CI.getOperand(ValueCount-ResultVals.size()+1);
3314 Out << "\"" << C << "\"(";
3316 writeOperand(SrcVal);
3318 writeOperandDeref(SrcVal);
3322 // Convert over the clobber constraints.
3325 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3326 E = Constraints.end(); I != E; ++I) {
3327 if (I->Type != InlineAsm::isClobber)
3328 continue; // Ignore non-input constraints.
3330 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3331 std::string C = InterpretASMConstraint(*I);
3332 if (C.empty()) continue;
3339 Out << '\"' << C << '"';
3345 void CWriter::visitMallocInst(MallocInst &I) {
3346 LLVM_UNREACHABLE("lowerallocations pass didn't work!");
3349 void CWriter::visitAllocaInst(AllocaInst &I) {
3351 printType(Out, I.getType());
3352 Out << ") alloca(sizeof(";
3353 printType(Out, I.getType()->getElementType());
3355 if (I.isArrayAllocation()) {
3357 writeOperand(I.getOperand(0));
3362 void CWriter::visitFreeInst(FreeInst &I) {
3363 LLVM_UNREACHABLE("lowerallocations pass didn't work!");
3366 void CWriter::printGEPExpression(Value *Ptr, gep_type_iterator I,
3367 gep_type_iterator E, bool Static) {
3369 // If there are no indices, just print out the pointer.
3375 // Find out if the last index is into a vector. If so, we have to print this
3376 // specially. Since vectors can't have elements of indexable type, only the
3377 // last index could possibly be of a vector element.
3378 const VectorType *LastIndexIsVector = 0;
3380 for (gep_type_iterator TmpI = I; TmpI != E; ++TmpI)
3381 LastIndexIsVector = dyn_cast<VectorType>(*TmpI);
3386 // If the last index is into a vector, we can't print it as &a[i][j] because
3387 // we can't index into a vector with j in GCC. Instead, emit this as
3388 // (((float*)&a[i])+j)
3389 if (LastIndexIsVector) {
3391 printType(Out, PointerType::getUnqual(LastIndexIsVector->getElementType()));
3397 // If the first index is 0 (very typical) we can do a number of
3398 // simplifications to clean up the code.
3399 Value *FirstOp = I.getOperand();
3400 if (!isa<Constant>(FirstOp) || !cast<Constant>(FirstOp)->isNullValue()) {
3401 // First index isn't simple, print it the hard way.
3404 ++I; // Skip the zero index.
3406 // Okay, emit the first operand. If Ptr is something that is already address
3407 // exposed, like a global, avoid emitting (&foo)[0], just emit foo instead.
3408 if (isAddressExposed(Ptr)) {
3409 writeOperandInternal(Ptr, Static);
3410 } else if (I != E && isa<StructType>(*I)) {
3411 // If we didn't already emit the first operand, see if we can print it as
3412 // P->f instead of "P[0].f"
3414 Out << "->field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3415 ++I; // eat the struct index as well.
3417 // Instead of emitting P[0][1], emit (*P)[1], which is more idiomatic.
3424 for (; I != E; ++I) {
3425 if (isa<StructType>(*I)) {
3426 Out << ".field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3427 } else if (isa<ArrayType>(*I)) {
3429 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3431 } else if (!isa<VectorType>(*I)) {
3433 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3436 // If the last index is into a vector, then print it out as "+j)". This
3437 // works with the 'LastIndexIsVector' code above.
3438 if (isa<Constant>(I.getOperand()) &&
3439 cast<Constant>(I.getOperand())->isNullValue()) {
3440 Out << "))"; // avoid "+0".
3443 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3451 void CWriter::writeMemoryAccess(Value *Operand, const Type *OperandType,
3452 bool IsVolatile, unsigned Alignment) {
3454 bool IsUnaligned = Alignment &&
3455 Alignment < TD->getABITypeAlignment(OperandType);
3459 if (IsVolatile || IsUnaligned) {
3462 Out << "struct __attribute__ ((packed, aligned(" << Alignment << "))) {";
3463 printType(Out, OperandType, false, IsUnaligned ? "data" : "volatile*");
3466 if (IsVolatile) Out << "volatile ";
3472 writeOperand(Operand);
3474 if (IsVolatile || IsUnaligned) {
3481 void CWriter::visitLoadInst(LoadInst &I) {
3482 writeMemoryAccess(I.getOperand(0), I.getType(), I.isVolatile(),
3487 void CWriter::visitStoreInst(StoreInst &I) {
3488 writeMemoryAccess(I.getPointerOperand(), I.getOperand(0)->getType(),
3489 I.isVolatile(), I.getAlignment());
3491 Value *Operand = I.getOperand(0);
3492 Constant *BitMask = 0;
3493 if (const IntegerType* ITy = dyn_cast<IntegerType>(Operand->getType()))
3494 if (!ITy->isPowerOf2ByteWidth())
3495 // We have a bit width that doesn't match an even power-of-2 byte
3496 // size. Consequently we must & the value with the type's bit mask
3497 BitMask = ConstantInt::get(ITy, ITy->getBitMask());
3500 writeOperand(Operand);
3503 printConstant(BitMask, false);
3508 void CWriter::visitGetElementPtrInst(GetElementPtrInst &I) {
3509 printGEPExpression(I.getPointerOperand(), gep_type_begin(I),
3510 gep_type_end(I), false);
3513 void CWriter::visitVAArgInst(VAArgInst &I) {
3514 Out << "va_arg(*(va_list*)";
3515 writeOperand(I.getOperand(0));
3517 printType(Out, I.getType());
3521 void CWriter::visitInsertElementInst(InsertElementInst &I) {
3522 const Type *EltTy = I.getType()->getElementType();
3523 writeOperand(I.getOperand(0));
3526 printType(Out, PointerType::getUnqual(EltTy));
3527 Out << ")(&" << GetValueName(&I) << "))[";
3528 writeOperand(I.getOperand(2));
3530 writeOperand(I.getOperand(1));
3534 void CWriter::visitExtractElementInst(ExtractElementInst &I) {
3535 // We know that our operand is not inlined.
3538 cast<VectorType>(I.getOperand(0)->getType())->getElementType();
3539 printType(Out, PointerType::getUnqual(EltTy));
3540 Out << ")(&" << GetValueName(I.getOperand(0)) << "))[";
3541 writeOperand(I.getOperand(1));
3545 void CWriter::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
3547 printType(Out, SVI.getType());
3549 const VectorType *VT = SVI.getType();
3550 unsigned NumElts = VT->getNumElements();
3551 const Type *EltTy = VT->getElementType();
3553 for (unsigned i = 0; i != NumElts; ++i) {
3555 int SrcVal = SVI.getMaskValue(i);
3556 if ((unsigned)SrcVal >= NumElts*2) {
3557 Out << " 0/*undef*/ ";
3559 Value *Op = SVI.getOperand((unsigned)SrcVal >= NumElts);
3560 if (isa<Instruction>(Op)) {
3561 // Do an extractelement of this value from the appropriate input.
3563 printType(Out, PointerType::getUnqual(EltTy));
3564 Out << ")(&" << GetValueName(Op)
3565 << "))[" << (SrcVal & (NumElts-1)) << "]";
3566 } else if (isa<ConstantAggregateZero>(Op) || isa<UndefValue>(Op)) {
3569 printConstant(cast<ConstantVector>(Op)->getOperand(SrcVal &
3578 void CWriter::visitInsertValueInst(InsertValueInst &IVI) {
3579 // Start by copying the entire aggregate value into the result variable.
3580 writeOperand(IVI.getOperand(0));
3583 // Then do the insert to update the field.
3584 Out << GetValueName(&IVI);
3585 for (const unsigned *b = IVI.idx_begin(), *i = b, *e = IVI.idx_end();
3587 const Type *IndexedTy =
3588 ExtractValueInst::getIndexedType(IVI.getOperand(0)->getType(), b, i+1);
3589 if (isa<ArrayType>(IndexedTy))
3590 Out << ".array[" << *i << "]";
3592 Out << ".field" << *i;
3595 writeOperand(IVI.getOperand(1));
3598 void CWriter::visitExtractValueInst(ExtractValueInst &EVI) {
3600 if (isa<UndefValue>(EVI.getOperand(0))) {
3602 printType(Out, EVI.getType());
3603 Out << ") 0/*UNDEF*/";
3605 Out << GetValueName(EVI.getOperand(0));
3606 for (const unsigned *b = EVI.idx_begin(), *i = b, *e = EVI.idx_end();
3608 const Type *IndexedTy =
3609 ExtractValueInst::getIndexedType(EVI.getOperand(0)->getType(), b, i+1);
3610 if (isa<ArrayType>(IndexedTy))
3611 Out << ".array[" << *i << "]";
3613 Out << ".field" << *i;
3619 //===----------------------------------------------------------------------===//
3620 // External Interface declaration
3621 //===----------------------------------------------------------------------===//
3623 bool CTargetMachine::addPassesToEmitWholeFile(PassManager &PM,
3625 CodeGenFileType FileType,
3626 CodeGenOpt::Level OptLevel) {
3627 if (FileType != TargetMachine::AssemblyFile) return true;
3629 PM.add(createGCLoweringPass());
3630 PM.add(createLowerAllocationsPass(true));
3631 PM.add(createLowerInvokePass());
3632 PM.add(createCFGSimplificationPass()); // clean up after lower invoke.
3633 PM.add(new CBackendNameAllUsedStructsAndMergeFunctions());
3634 PM.add(new CWriter(o));
3635 PM.add(createGCInfoDeleter());