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/Intrinsics.h"
24 #include "llvm/IntrinsicInst.h"
25 #include "llvm/InlineAsm.h"
26 #include "llvm/ADT/StringExtras.h"
27 #include "llvm/ADT/SmallString.h"
28 #include "llvm/ADT/STLExtras.h"
29 #include "llvm/Analysis/ConstantsScanner.h"
30 #include "llvm/Analysis/FindUsedTypes.h"
31 #include "llvm/Analysis/LoopInfo.h"
32 #include "llvm/Analysis/ValueTracking.h"
33 #include "llvm/CodeGen/Passes.h"
34 #include "llvm/CodeGen/IntrinsicLowering.h"
35 #include "llvm/Target/Mangler.h"
36 #include "llvm/Transforms/Scalar.h"
37 #include "llvm/MC/MCAsmInfo.h"
38 #include "llvm/MC/MCContext.h"
39 #include "llvm/MC/MCInstrInfo.h"
40 #include "llvm/MC/MCSubtargetInfo.h"
41 #include "llvm/MC/MCSymbol.h"
42 #include "llvm/Target/TargetData.h"
43 #include "llvm/Target/TargetRegistry.h"
44 #include "llvm/Support/CallSite.h"
45 #include "llvm/Support/CFG.h"
46 #include "llvm/Support/ErrorHandling.h"
47 #include "llvm/Support/FormattedStream.h"
48 #include "llvm/Support/GetElementPtrTypeIterator.h"
49 #include "llvm/Support/InstVisitor.h"
50 #include "llvm/Support/MathExtras.h"
51 #include "llvm/Support/Host.h"
52 #include "llvm/Config/config.h"
54 // Some ms header decided to define setjmp as _setjmp, undo this for this file.
60 extern "C" void LLVMInitializeCBackendTarget() {
61 // Register the target.
62 RegisterTargetMachine<CTargetMachine> X(TheCBackendTarget);
65 extern "C" void LLVMInitializeCBackendMCInstrInfo() {
66 RegisterMCInstrInfo<MCInstrInfo> X(TheCBackendTarget);
69 extern "C" void LLVMInitializeCBackendMCSubtargetInfo() {
70 RegisterMCSubtargetInfo<MCSubtargetInfo> X(TheCBackendTarget);
74 class CBEMCAsmInfo : public MCAsmInfo {
78 PrivateGlobalPrefix = "";
82 /// CWriter - This class is the main chunk of code that converts an LLVM
83 /// module to a C translation unit.
84 class CWriter : public FunctionPass, public InstVisitor<CWriter> {
85 formatted_raw_ostream &Out;
86 IntrinsicLowering *IL;
89 const Module *TheModule;
90 const MCAsmInfo* TAsm;
94 std::map<const ConstantFP *, unsigned> FPConstantMap;
95 std::set<Function*> intrinsicPrototypesAlreadyGenerated;
96 std::set<const Argument*> ByValParams;
98 unsigned OpaqueCounter;
99 DenseMap<const Value*, unsigned> AnonValueNumbers;
100 unsigned NextAnonValueNumber;
102 /// UnnamedStructIDs - This contains a unique ID for each struct that is
103 /// either anonymous or has no name.
104 DenseMap<const StructType*, unsigned> UnnamedStructIDs;
108 explicit CWriter(formatted_raw_ostream &o)
109 : FunctionPass(ID), Out(o), IL(0), Mang(0), LI(0),
110 TheModule(0), TAsm(0), TCtx(0), TD(0), OpaqueCounter(0),
111 NextAnonValueNumber(0) {
112 initializeLoopInfoPass(*PassRegistry::getPassRegistry());
116 virtual const char *getPassName() const { return "C backend"; }
118 void getAnalysisUsage(AnalysisUsage &AU) const {
119 AU.addRequired<LoopInfo>();
120 AU.setPreservesAll();
123 virtual bool doInitialization(Module &M);
125 bool runOnFunction(Function &F) {
126 // Do not codegen any 'available_externally' functions at all, they have
127 // definitions outside the translation unit.
128 if (F.hasAvailableExternallyLinkage())
131 LI = &getAnalysis<LoopInfo>();
133 // Get rid of intrinsics we can't handle.
136 // Output all floating point constants that cannot be printed accurately.
137 printFloatingPointConstants(F);
143 virtual bool doFinalization(Module &M) {
150 FPConstantMap.clear();
152 intrinsicPrototypesAlreadyGenerated.clear();
153 UnnamedStructIDs.clear();
157 raw_ostream &printType(raw_ostream &Out, const Type *Ty,
158 bool isSigned = false,
159 const std::string &VariableName = "",
160 bool IgnoreName = false,
161 const AttrListPtr &PAL = AttrListPtr());
162 raw_ostream &printSimpleType(raw_ostream &Out, const Type *Ty,
164 const std::string &NameSoFar = "");
166 void printStructReturnPointerFunctionType(raw_ostream &Out,
167 const AttrListPtr &PAL,
168 const PointerType *Ty);
170 std::string getStructName(const StructType *ST);
172 /// writeOperandDeref - Print the result of dereferencing the specified
173 /// operand with '*'. This is equivalent to printing '*' then using
174 /// writeOperand, but avoids excess syntax in some cases.
175 void writeOperandDeref(Value *Operand) {
176 if (isAddressExposed(Operand)) {
177 // Already something with an address exposed.
178 writeOperandInternal(Operand);
181 writeOperand(Operand);
186 void writeOperand(Value *Operand, bool Static = false);
187 void writeInstComputationInline(Instruction &I);
188 void writeOperandInternal(Value *Operand, bool Static = false);
189 void writeOperandWithCast(Value* Operand, unsigned Opcode);
190 void writeOperandWithCast(Value* Operand, const ICmpInst &I);
191 bool writeInstructionCast(const Instruction &I);
193 void writeMemoryAccess(Value *Operand, const Type *OperandType,
194 bool IsVolatile, unsigned Alignment);
197 std::string InterpretASMConstraint(InlineAsm::ConstraintInfo& c);
199 void lowerIntrinsics(Function &F);
200 /// Prints the definition of the intrinsic function F. Supports the
201 /// intrinsics which need to be explicitly defined in the CBackend.
202 void printIntrinsicDefinition(const Function &F, raw_ostream &Out);
204 void printModuleTypes();
205 void printContainedStructs(const Type *Ty, SmallPtrSet<const Type *, 16> &);
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::getVoidTy(I.getContext()) || !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);
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 (const CallInst *CI = dyn_cast<CallInst>(&I))
279 return isa<InlineAsm>(CI->getCalledValue());
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 visitIndirectBrInst(IndirectBrInst &I);
290 void visitInvokeInst(InvokeInst &I) {
291 llvm_unreachable("Lowerinvoke pass didn't work!");
294 void visitUnwindInst(UnwindInst &I) {
295 llvm_unreachable("Lowerinvoke pass didn't work!");
297 void visitUnreachableInst(UnreachableInst &I);
299 void visitPHINode(PHINode &I);
300 void visitBinaryOperator(Instruction &I);
301 void visitICmpInst(ICmpInst &I);
302 void visitFCmpInst(FCmpInst &I);
304 void visitCastInst (CastInst &I);
305 void visitSelectInst(SelectInst &I);
306 void visitCallInst (CallInst &I);
307 void visitInlineAsm(CallInst &I);
308 bool visitBuiltinCall(CallInst &I, Intrinsic::ID ID, bool &WroteCallee);
310 void visitAllocaInst(AllocaInst &I);
311 void visitLoadInst (LoadInst &I);
312 void visitStoreInst (StoreInst &I);
313 void visitGetElementPtrInst(GetElementPtrInst &I);
314 void visitVAArgInst (VAArgInst &I);
316 void visitInsertElementInst(InsertElementInst &I);
317 void visitExtractElementInst(ExtractElementInst &I);
318 void visitShuffleVectorInst(ShuffleVectorInst &SVI);
320 void visitInsertValueInst(InsertValueInst &I);
321 void visitExtractValueInst(ExtractValueInst &I);
323 void visitInstruction(Instruction &I) {
325 errs() << "C Writer does not know about " << I;
330 void outputLValue(Instruction *I) {
331 Out << " " << GetValueName(I) << " = ";
334 bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To);
335 void printPHICopiesForSuccessor(BasicBlock *CurBlock,
336 BasicBlock *Successor, unsigned Indent);
337 void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
339 void printGEPExpression(Value *Ptr, gep_type_iterator I,
340 gep_type_iterator E, bool Static);
342 std::string GetValueName(const Value *Operand);
346 char CWriter::ID = 0;
350 static std::string CBEMangle(const std::string &S) {
353 for (unsigned i = 0, e = S.size(); i != e; ++i)
354 if (isalnum(S[i]) || S[i] == '_') {
358 Result += 'A'+(S[i]&15);
359 Result += 'A'+((S[i]>>4)&15);
365 std::string CWriter::getStructName(const StructType *ST) {
366 if (!ST->isAnonymous() && !ST->getName().empty())
367 return CBEMangle("l_"+ST->getName().str());
369 return "l_unnamed_" + utostr(UnnamedStructIDs[ST]);
373 /// printStructReturnPointerFunctionType - This is like printType for a struct
374 /// return type, except, instead of printing the type as void (*)(Struct*, ...)
375 /// print it as "Struct (*)(...)", for struct return functions.
376 void CWriter::printStructReturnPointerFunctionType(raw_ostream &Out,
377 const AttrListPtr &PAL,
378 const PointerType *TheTy) {
379 const FunctionType *FTy = cast<FunctionType>(TheTy->getElementType());
381 raw_string_ostream FunctionInnards(tstr);
382 FunctionInnards << " (*) (";
383 bool PrintedType = false;
385 FunctionType::param_iterator I = FTy->param_begin(), E = FTy->param_end();
386 const Type *RetTy = cast<PointerType>(*I)->getElementType();
388 for (++I, ++Idx; I != E; ++I, ++Idx) {
390 FunctionInnards << ", ";
391 const Type *ArgTy = *I;
392 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
393 assert(ArgTy->isPointerTy());
394 ArgTy = cast<PointerType>(ArgTy)->getElementType();
396 printType(FunctionInnards, ArgTy,
397 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
400 if (FTy->isVarArg()) {
402 FunctionInnards << " int"; //dummy argument for empty vararg functs
403 FunctionInnards << ", ...";
404 } else if (!PrintedType) {
405 FunctionInnards << "void";
407 FunctionInnards << ')';
408 printType(Out, RetTy,
409 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), FunctionInnards.str());
413 CWriter::printSimpleType(raw_ostream &Out, const Type *Ty, bool isSigned,
414 const std::string &NameSoFar) {
415 assert((Ty->isPrimitiveType() || Ty->isIntegerTy() || Ty->isVectorTy()) &&
416 "Invalid type for printSimpleType");
417 switch (Ty->getTypeID()) {
418 case Type::VoidTyID: return Out << "void " << NameSoFar;
419 case Type::IntegerTyID: {
420 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
422 return Out << "bool " << NameSoFar;
423 else if (NumBits <= 8)
424 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
425 else if (NumBits <= 16)
426 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
427 else if (NumBits <= 32)
428 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
429 else if (NumBits <= 64)
430 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
432 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
433 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
436 case Type::FloatTyID: return Out << "float " << NameSoFar;
437 case Type::DoubleTyID: return Out << "double " << NameSoFar;
438 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
439 // present matches host 'long double'.
440 case Type::X86_FP80TyID:
441 case Type::PPC_FP128TyID:
442 case Type::FP128TyID: return Out << "long double " << NameSoFar;
444 case Type::X86_MMXTyID:
445 return printSimpleType(Out, Type::getInt32Ty(Ty->getContext()), isSigned,
446 " __attribute__((vector_size(64))) " + NameSoFar);
448 case Type::VectorTyID: {
449 const VectorType *VTy = cast<VectorType>(Ty);
450 return printSimpleType(Out, VTy->getElementType(), isSigned,
451 " __attribute__((vector_size(" +
452 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
457 errs() << "Unknown primitive type: " << *Ty << "\n";
463 // Pass the Type* and the variable name and this prints out the variable
466 raw_ostream &CWriter::printType(raw_ostream &Out, const Type *Ty,
467 bool isSigned, const std::string &NameSoFar,
468 bool IgnoreName, const AttrListPtr &PAL) {
469 if (Ty->isPrimitiveType() || Ty->isIntegerTy() || Ty->isVectorTy()) {
470 printSimpleType(Out, Ty, isSigned, NameSoFar);
474 switch (Ty->getTypeID()) {
475 case Type::FunctionTyID: {
476 const FunctionType *FTy = cast<FunctionType>(Ty);
478 raw_string_ostream FunctionInnards(tstr);
479 FunctionInnards << " (" << NameSoFar << ") (";
481 for (FunctionType::param_iterator I = FTy->param_begin(),
482 E = FTy->param_end(); I != E; ++I) {
483 const Type *ArgTy = *I;
484 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
485 assert(ArgTy->isPointerTy());
486 ArgTy = cast<PointerType>(ArgTy)->getElementType();
488 if (I != FTy->param_begin())
489 FunctionInnards << ", ";
490 printType(FunctionInnards, ArgTy,
491 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
494 if (FTy->isVarArg()) {
495 if (!FTy->getNumParams())
496 FunctionInnards << " int"; //dummy argument for empty vaarg functs
497 FunctionInnards << ", ...";
498 } else if (!FTy->getNumParams()) {
499 FunctionInnards << "void";
501 FunctionInnards << ')';
502 printType(Out, FTy->getReturnType(),
503 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), FunctionInnards.str());
506 case Type::StructTyID: {
507 const StructType *STy = cast<StructType>(Ty);
509 // Check to see if the type is named.
511 return Out << getStructName(STy) << ' ' << NameSoFar;
513 Out << NameSoFar + " {\n";
515 for (StructType::element_iterator I = STy->element_begin(),
516 E = STy->element_end(); I != E; ++I) {
518 printType(Out, *I, false, "field" + utostr(Idx++));
523 Out << " __attribute__ ((packed))";
527 case Type::PointerTyID: {
528 const PointerType *PTy = cast<PointerType>(Ty);
529 std::string ptrName = "*" + NameSoFar;
531 if (PTy->getElementType()->isArrayTy() ||
532 PTy->getElementType()->isVectorTy())
533 ptrName = "(" + ptrName + ")";
536 // Must be a function ptr cast!
537 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
538 return printType(Out, PTy->getElementType(), false, ptrName);
541 case Type::ArrayTyID: {
542 const ArrayType *ATy = cast<ArrayType>(Ty);
543 unsigned NumElements = ATy->getNumElements();
544 if (NumElements == 0) NumElements = 1;
545 // Arrays are wrapped in structs to allow them to have normal
546 // value semantics (avoiding the array "decay").
547 Out << NameSoFar << " { ";
548 printType(Out, ATy->getElementType(), false,
549 "array[" + utostr(NumElements) + "]");
554 llvm_unreachable("Unhandled case in getTypeProps!");
560 void CWriter::printConstantArray(ConstantArray *CPA, bool Static) {
562 // As a special case, print the array as a string if it is an array of
563 // ubytes or an array of sbytes with positive values.
565 const Type *ETy = CPA->getType()->getElementType();
566 bool isString = (ETy == Type::getInt8Ty(CPA->getContext()) ||
567 ETy == Type::getInt8Ty(CPA->getContext()));
569 // Make sure the last character is a null char, as automatically added by C
570 if (isString && (CPA->getNumOperands() == 0 ||
571 !cast<Constant>(*(CPA->op_end()-1))->isNullValue()))
576 // Keep track of whether the last number was a hexadecimal escape.
577 bool LastWasHex = false;
579 // Do not include the last character, which we know is null
580 for (unsigned i = 0, e = CPA->getNumOperands()-1; i != e; ++i) {
581 unsigned char C = cast<ConstantInt>(CPA->getOperand(i))->getZExtValue();
583 // Print it out literally if it is a printable character. The only thing
584 // to be careful about is when the last letter output was a hex escape
585 // code, in which case we have to be careful not to print out hex digits
586 // explicitly (the C compiler thinks it is a continuation of the previous
587 // character, sheesh...)
589 if (isprint(C) && (!LastWasHex || !isxdigit(C))) {
591 if (C == '"' || C == '\\')
592 Out << "\\" << (char)C;
598 case '\n': Out << "\\n"; break;
599 case '\t': Out << "\\t"; break;
600 case '\r': Out << "\\r"; break;
601 case '\v': Out << "\\v"; break;
602 case '\a': Out << "\\a"; break;
603 case '\"': Out << "\\\""; break;
604 case '\'': Out << "\\\'"; break;
607 Out << (char)(( C/16 < 10) ? ( C/16 +'0') : ( C/16 -10+'A'));
608 Out << (char)(((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A'));
617 if (CPA->getNumOperands()) {
619 printConstant(cast<Constant>(CPA->getOperand(0)), Static);
620 for (unsigned i = 1, e = CPA->getNumOperands(); i != e; ++i) {
622 printConstant(cast<Constant>(CPA->getOperand(i)), Static);
629 void CWriter::printConstantVector(ConstantVector *CP, bool Static) {
631 if (CP->getNumOperands()) {
633 printConstant(cast<Constant>(CP->getOperand(0)), Static);
634 for (unsigned i = 1, e = CP->getNumOperands(); i != e; ++i) {
636 printConstant(cast<Constant>(CP->getOperand(i)), Static);
642 // isFPCSafeToPrint - Returns true if we may assume that CFP may be written out
643 // textually as a double (rather than as a reference to a stack-allocated
644 // variable). We decide this by converting CFP to a string and back into a
645 // double, and then checking whether the conversion results in a bit-equal
646 // double to the original value of CFP. This depends on us and the target C
647 // compiler agreeing on the conversion process (which is pretty likely since we
648 // only deal in IEEE FP).
650 static bool isFPCSafeToPrint(const ConstantFP *CFP) {
652 // Do long doubles in hex for now.
653 if (CFP->getType() != Type::getFloatTy(CFP->getContext()) &&
654 CFP->getType() != Type::getDoubleTy(CFP->getContext()))
656 APFloat APF = APFloat(CFP->getValueAPF()); // copy
657 if (CFP->getType() == Type::getFloatTy(CFP->getContext()))
658 APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &ignored);
659 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
661 sprintf(Buffer, "%a", APF.convertToDouble());
662 if (!strncmp(Buffer, "0x", 2) ||
663 !strncmp(Buffer, "-0x", 3) ||
664 !strncmp(Buffer, "+0x", 3))
665 return APF.bitwiseIsEqual(APFloat(atof(Buffer)));
668 std::string StrVal = ftostr(APF);
670 while (StrVal[0] == ' ')
671 StrVal.erase(StrVal.begin());
673 // Check to make sure that the stringized number is not some string like "Inf"
674 // or NaN. Check that the string matches the "[-+]?[0-9]" regex.
675 if ((StrVal[0] >= '0' && StrVal[0] <= '9') ||
676 ((StrVal[0] == '-' || StrVal[0] == '+') &&
677 (StrVal[1] >= '0' && StrVal[1] <= '9')))
678 // Reparse stringized version!
679 return APF.bitwiseIsEqual(APFloat(atof(StrVal.c_str())));
684 /// Print out the casting for a cast operation. This does the double casting
685 /// necessary for conversion to the destination type, if necessary.
686 /// @brief Print a cast
687 void CWriter::printCast(unsigned opc, const Type *SrcTy, const Type *DstTy) {
688 // Print the destination type cast
690 case Instruction::UIToFP:
691 case Instruction::SIToFP:
692 case Instruction::IntToPtr:
693 case Instruction::Trunc:
694 case Instruction::BitCast:
695 case Instruction::FPExt:
696 case Instruction::FPTrunc: // For these the DstTy sign doesn't matter
698 printType(Out, DstTy);
701 case Instruction::ZExt:
702 case Instruction::PtrToInt:
703 case Instruction::FPToUI: // For these, make sure we get an unsigned dest
705 printSimpleType(Out, DstTy, false);
708 case Instruction::SExt:
709 case Instruction::FPToSI: // For these, make sure we get a signed dest
711 printSimpleType(Out, DstTy, true);
715 llvm_unreachable("Invalid cast opcode");
718 // Print the source type cast
720 case Instruction::UIToFP:
721 case Instruction::ZExt:
723 printSimpleType(Out, SrcTy, false);
726 case Instruction::SIToFP:
727 case Instruction::SExt:
729 printSimpleType(Out, SrcTy, true);
732 case Instruction::IntToPtr:
733 case Instruction::PtrToInt:
734 // Avoid "cast to pointer from integer of different size" warnings
735 Out << "(unsigned long)";
737 case Instruction::Trunc:
738 case Instruction::BitCast:
739 case Instruction::FPExt:
740 case Instruction::FPTrunc:
741 case Instruction::FPToSI:
742 case Instruction::FPToUI:
743 break; // These don't need a source cast.
745 llvm_unreachable("Invalid cast opcode");
750 // printConstant - The LLVM Constant to C Constant converter.
751 void CWriter::printConstant(Constant *CPV, bool Static) {
752 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
753 switch (CE->getOpcode()) {
754 case Instruction::Trunc:
755 case Instruction::ZExt:
756 case Instruction::SExt:
757 case Instruction::FPTrunc:
758 case Instruction::FPExt:
759 case Instruction::UIToFP:
760 case Instruction::SIToFP:
761 case Instruction::FPToUI:
762 case Instruction::FPToSI:
763 case Instruction::PtrToInt:
764 case Instruction::IntToPtr:
765 case Instruction::BitCast:
767 printCast(CE->getOpcode(), CE->getOperand(0)->getType(), CE->getType());
768 if (CE->getOpcode() == Instruction::SExt &&
769 CE->getOperand(0)->getType() == Type::getInt1Ty(CPV->getContext())) {
770 // Make sure we really sext from bool here by subtracting from 0
773 printConstant(CE->getOperand(0), Static);
774 if (CE->getType() == Type::getInt1Ty(CPV->getContext()) &&
775 (CE->getOpcode() == Instruction::Trunc ||
776 CE->getOpcode() == Instruction::FPToUI ||
777 CE->getOpcode() == Instruction::FPToSI ||
778 CE->getOpcode() == Instruction::PtrToInt)) {
779 // Make sure we really truncate to bool here by anding with 1
785 case Instruction::GetElementPtr:
787 printGEPExpression(CE->getOperand(0), gep_type_begin(CPV),
788 gep_type_end(CPV), Static);
791 case Instruction::Select:
793 printConstant(CE->getOperand(0), Static);
795 printConstant(CE->getOperand(1), Static);
797 printConstant(CE->getOperand(2), Static);
800 case Instruction::Add:
801 case Instruction::FAdd:
802 case Instruction::Sub:
803 case Instruction::FSub:
804 case Instruction::Mul:
805 case Instruction::FMul:
806 case Instruction::SDiv:
807 case Instruction::UDiv:
808 case Instruction::FDiv:
809 case Instruction::URem:
810 case Instruction::SRem:
811 case Instruction::FRem:
812 case Instruction::And:
813 case Instruction::Or:
814 case Instruction::Xor:
815 case Instruction::ICmp:
816 case Instruction::Shl:
817 case Instruction::LShr:
818 case Instruction::AShr:
821 bool NeedsClosingParens = printConstExprCast(CE, Static);
822 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
823 switch (CE->getOpcode()) {
824 case Instruction::Add:
825 case Instruction::FAdd: Out << " + "; break;
826 case Instruction::Sub:
827 case Instruction::FSub: Out << " - "; break;
828 case Instruction::Mul:
829 case Instruction::FMul: Out << " * "; break;
830 case Instruction::URem:
831 case Instruction::SRem:
832 case Instruction::FRem: Out << " % "; break;
833 case Instruction::UDiv:
834 case Instruction::SDiv:
835 case Instruction::FDiv: Out << " / "; break;
836 case Instruction::And: Out << " & "; break;
837 case Instruction::Or: Out << " | "; break;
838 case Instruction::Xor: Out << " ^ "; break;
839 case Instruction::Shl: Out << " << "; break;
840 case Instruction::LShr:
841 case Instruction::AShr: Out << " >> "; break;
842 case Instruction::ICmp:
843 switch (CE->getPredicate()) {
844 case ICmpInst::ICMP_EQ: Out << " == "; break;
845 case ICmpInst::ICMP_NE: Out << " != "; break;
846 case ICmpInst::ICMP_SLT:
847 case ICmpInst::ICMP_ULT: Out << " < "; break;
848 case ICmpInst::ICMP_SLE:
849 case ICmpInst::ICMP_ULE: Out << " <= "; break;
850 case ICmpInst::ICMP_SGT:
851 case ICmpInst::ICMP_UGT: Out << " > "; break;
852 case ICmpInst::ICMP_SGE:
853 case ICmpInst::ICMP_UGE: Out << " >= "; break;
854 default: llvm_unreachable("Illegal ICmp predicate");
857 default: llvm_unreachable("Illegal opcode here!");
859 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
860 if (NeedsClosingParens)
865 case Instruction::FCmp: {
867 bool NeedsClosingParens = printConstExprCast(CE, Static);
868 if (CE->getPredicate() == FCmpInst::FCMP_FALSE)
870 else if (CE->getPredicate() == FCmpInst::FCMP_TRUE)
874 switch (CE->getPredicate()) {
875 default: llvm_unreachable("Illegal FCmp predicate");
876 case FCmpInst::FCMP_ORD: op = "ord"; break;
877 case FCmpInst::FCMP_UNO: op = "uno"; break;
878 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
879 case FCmpInst::FCMP_UNE: op = "une"; break;
880 case FCmpInst::FCMP_ULT: op = "ult"; break;
881 case FCmpInst::FCMP_ULE: op = "ule"; break;
882 case FCmpInst::FCMP_UGT: op = "ugt"; break;
883 case FCmpInst::FCMP_UGE: op = "uge"; break;
884 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
885 case FCmpInst::FCMP_ONE: op = "one"; break;
886 case FCmpInst::FCMP_OLT: op = "olt"; break;
887 case FCmpInst::FCMP_OLE: op = "ole"; break;
888 case FCmpInst::FCMP_OGT: op = "ogt"; break;
889 case FCmpInst::FCMP_OGE: op = "oge"; break;
891 Out << "llvm_fcmp_" << op << "(";
892 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
894 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
897 if (NeedsClosingParens)
904 errs() << "CWriter Error: Unhandled constant expression: "
909 } else if (isa<UndefValue>(CPV) && CPV->getType()->isSingleValueType()) {
911 printType(Out, CPV->getType()); // sign doesn't matter
913 if (!CPV->getType()->isVectorTy()) {
921 if (ConstantInt *CI = dyn_cast<ConstantInt>(CPV)) {
922 const Type* Ty = CI->getType();
923 if (Ty == Type::getInt1Ty(CPV->getContext()))
924 Out << (CI->getZExtValue() ? '1' : '0');
925 else if (Ty == Type::getInt32Ty(CPV->getContext()))
926 Out << CI->getZExtValue() << 'u';
927 else if (Ty->getPrimitiveSizeInBits() > 32)
928 Out << CI->getZExtValue() << "ull";
931 printSimpleType(Out, Ty, false) << ')';
932 if (CI->isMinValue(true))
933 Out << CI->getZExtValue() << 'u';
935 Out << CI->getSExtValue();
941 switch (CPV->getType()->getTypeID()) {
942 case Type::FloatTyID:
943 case Type::DoubleTyID:
944 case Type::X86_FP80TyID:
945 case Type::PPC_FP128TyID:
946 case Type::FP128TyID: {
947 ConstantFP *FPC = cast<ConstantFP>(CPV);
948 std::map<const ConstantFP*, unsigned>::iterator I = FPConstantMap.find(FPC);
949 if (I != FPConstantMap.end()) {
950 // Because of FP precision problems we must load from a stack allocated
951 // value that holds the value in hex.
952 Out << "(*(" << (FPC->getType() == Type::getFloatTy(CPV->getContext()) ?
954 FPC->getType() == Type::getDoubleTy(CPV->getContext()) ?
957 << "*)&FPConstant" << I->second << ')';
960 if (FPC->getType() == Type::getFloatTy(CPV->getContext()))
961 V = FPC->getValueAPF().convertToFloat();
962 else if (FPC->getType() == Type::getDoubleTy(CPV->getContext()))
963 V = FPC->getValueAPF().convertToDouble();
965 // Long double. Convert the number to double, discarding precision.
966 // This is not awesome, but it at least makes the CBE output somewhat
968 APFloat Tmp = FPC->getValueAPF();
970 Tmp.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &LosesInfo);
971 V = Tmp.convertToDouble();
977 // FIXME the actual NaN bits should be emitted.
978 // The prefix for a quiet NaN is 0x7FF8. For a signalling NaN,
980 const unsigned long QuietNaN = 0x7ff8UL;
981 //const unsigned long SignalNaN = 0x7ff4UL;
983 // We need to grab the first part of the FP #
986 uint64_t ll = DoubleToBits(V);
987 sprintf(Buffer, "0x%llx", static_cast<long long>(ll));
989 std::string Num(&Buffer[0], &Buffer[6]);
990 unsigned long Val = strtoul(Num.c_str(), 0, 16);
992 if (FPC->getType() == Type::getFloatTy(FPC->getContext()))
993 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "F(\""
994 << Buffer << "\") /*nan*/ ";
996 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "(\""
997 << Buffer << "\") /*nan*/ ";
998 } else if (IsInf(V)) {
1000 if (V < 0) Out << '-';
1001 Out << "LLVM_INF" <<
1002 (FPC->getType() == Type::getFloatTy(FPC->getContext()) ? "F" : "")
1006 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
1007 // Print out the constant as a floating point number.
1009 sprintf(Buffer, "%a", V);
1012 Num = ftostr(FPC->getValueAPF());
1020 case Type::ArrayTyID:
1021 // Use C99 compound expression literal initializer syntax.
1024 printType(Out, CPV->getType());
1027 Out << "{ "; // Arrays are wrapped in struct types.
1028 if (ConstantArray *CA = dyn_cast<ConstantArray>(CPV)) {
1029 printConstantArray(CA, Static);
1031 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1032 const ArrayType *AT = cast<ArrayType>(CPV->getType());
1034 if (AT->getNumElements()) {
1036 Constant *CZ = Constant::getNullValue(AT->getElementType());
1037 printConstant(CZ, Static);
1038 for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
1040 printConstant(CZ, Static);
1045 Out << " }"; // Arrays are wrapped in struct types.
1048 case Type::VectorTyID:
1049 // Use C99 compound expression literal initializer syntax.
1052 printType(Out, CPV->getType());
1055 if (ConstantVector *CV = dyn_cast<ConstantVector>(CPV)) {
1056 printConstantVector(CV, Static);
1058 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1059 const VectorType *VT = cast<VectorType>(CPV->getType());
1061 Constant *CZ = Constant::getNullValue(VT->getElementType());
1062 printConstant(CZ, Static);
1063 for (unsigned i = 1, e = VT->getNumElements(); i != e; ++i) {
1065 printConstant(CZ, Static);
1071 case Type::StructTyID:
1072 // Use C99 compound expression literal initializer syntax.
1075 printType(Out, CPV->getType());
1078 if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
1079 const StructType *ST = cast<StructType>(CPV->getType());
1081 if (ST->getNumElements()) {
1083 printConstant(Constant::getNullValue(ST->getElementType(0)), Static);
1084 for (unsigned i = 1, e = ST->getNumElements(); i != e; ++i) {
1086 printConstant(Constant::getNullValue(ST->getElementType(i)), Static);
1092 if (CPV->getNumOperands()) {
1094 printConstant(cast<Constant>(CPV->getOperand(0)), Static);
1095 for (unsigned i = 1, e = CPV->getNumOperands(); i != e; ++i) {
1097 printConstant(cast<Constant>(CPV->getOperand(i)), Static);
1104 case Type::PointerTyID:
1105 if (isa<ConstantPointerNull>(CPV)) {
1107 printType(Out, CPV->getType()); // sign doesn't matter
1108 Out << ")/*NULL*/0)";
1110 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(CPV)) {
1111 writeOperand(GV, Static);
1117 errs() << "Unknown constant type: " << *CPV << "\n";
1119 llvm_unreachable(0);
1123 // Some constant expressions need to be casted back to the original types
1124 // because their operands were casted to the expected type. This function takes
1125 // care of detecting that case and printing the cast for the ConstantExpr.
1126 bool CWriter::printConstExprCast(const ConstantExpr* CE, bool Static) {
1127 bool NeedsExplicitCast = false;
1128 const Type *Ty = CE->getOperand(0)->getType();
1129 bool TypeIsSigned = false;
1130 switch (CE->getOpcode()) {
1131 case Instruction::Add:
1132 case Instruction::Sub:
1133 case Instruction::Mul:
1134 // We need to cast integer arithmetic so that it is always performed
1135 // as unsigned, to avoid undefined behavior on overflow.
1136 case Instruction::LShr:
1137 case Instruction::URem:
1138 case Instruction::UDiv: NeedsExplicitCast = true; break;
1139 case Instruction::AShr:
1140 case Instruction::SRem:
1141 case Instruction::SDiv: NeedsExplicitCast = true; TypeIsSigned = true; break;
1142 case Instruction::SExt:
1144 NeedsExplicitCast = true;
1145 TypeIsSigned = true;
1147 case Instruction::ZExt:
1148 case Instruction::Trunc:
1149 case Instruction::FPTrunc:
1150 case Instruction::FPExt:
1151 case Instruction::UIToFP:
1152 case Instruction::SIToFP:
1153 case Instruction::FPToUI:
1154 case Instruction::FPToSI:
1155 case Instruction::PtrToInt:
1156 case Instruction::IntToPtr:
1157 case Instruction::BitCast:
1159 NeedsExplicitCast = true;
1163 if (NeedsExplicitCast) {
1165 if (Ty->isIntegerTy() && Ty != Type::getInt1Ty(Ty->getContext()))
1166 printSimpleType(Out, Ty, TypeIsSigned);
1168 printType(Out, Ty); // not integer, sign doesn't matter
1171 return NeedsExplicitCast;
1174 // Print a constant assuming that it is the operand for a given Opcode. The
1175 // opcodes that care about sign need to cast their operands to the expected
1176 // type before the operation proceeds. This function does the casting.
1177 void CWriter::printConstantWithCast(Constant* CPV, unsigned Opcode) {
1179 // Extract the operand's type, we'll need it.
1180 const Type* OpTy = CPV->getType();
1182 // Indicate whether to do the cast or not.
1183 bool shouldCast = false;
1184 bool typeIsSigned = false;
1186 // Based on the Opcode for which this Constant is being written, determine
1187 // the new type to which the operand should be casted by setting the value
1188 // of OpTy. If we change OpTy, also set shouldCast to true so it gets
1192 // for most instructions, it doesn't matter
1194 case Instruction::Add:
1195 case Instruction::Sub:
1196 case Instruction::Mul:
1197 // We need to cast integer arithmetic so that it is always performed
1198 // as unsigned, to avoid undefined behavior on overflow.
1199 case Instruction::LShr:
1200 case Instruction::UDiv:
1201 case Instruction::URem:
1204 case Instruction::AShr:
1205 case Instruction::SDiv:
1206 case Instruction::SRem:
1208 typeIsSigned = true;
1212 // Write out the casted constant if we should, otherwise just write the
1216 printSimpleType(Out, OpTy, typeIsSigned);
1218 printConstant(CPV, false);
1221 printConstant(CPV, false);
1224 std::string CWriter::GetValueName(const Value *Operand) {
1226 // Resolve potential alias.
1227 if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(Operand)) {
1228 if (const Value *V = GA->resolveAliasedGlobal(false))
1232 // Mangle globals with the standard mangler interface for LLC compatibility.
1233 if (const GlobalValue *GV = dyn_cast<GlobalValue>(Operand)) {
1234 SmallString<128> Str;
1235 Mang->getNameWithPrefix(Str, GV, false);
1236 return CBEMangle(Str.str().str());
1239 std::string Name = Operand->getName();
1241 if (Name.empty()) { // Assign unique names to local temporaries.
1242 unsigned &No = AnonValueNumbers[Operand];
1244 No = ++NextAnonValueNumber;
1245 Name = "tmp__" + utostr(No);
1248 std::string VarName;
1249 VarName.reserve(Name.capacity());
1251 for (std::string::iterator I = Name.begin(), E = Name.end();
1255 if (!((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
1256 (ch >= '0' && ch <= '9') || ch == '_')) {
1258 sprintf(buffer, "_%x_", ch);
1264 return "llvm_cbe_" + VarName;
1267 /// writeInstComputationInline - Emit the computation for the specified
1268 /// instruction inline, with no destination provided.
1269 void CWriter::writeInstComputationInline(Instruction &I) {
1270 // We can't currently support integer types other than 1, 8, 16, 32, 64.
1272 const Type *Ty = I.getType();
1273 if (Ty->isIntegerTy() && (Ty!=Type::getInt1Ty(I.getContext()) &&
1274 Ty!=Type::getInt8Ty(I.getContext()) &&
1275 Ty!=Type::getInt16Ty(I.getContext()) &&
1276 Ty!=Type::getInt32Ty(I.getContext()) &&
1277 Ty!=Type::getInt64Ty(I.getContext()))) {
1278 report_fatal_error("The C backend does not currently support integer "
1279 "types of widths other than 1, 8, 16, 32, 64.\n"
1280 "This is being tracked as PR 4158.");
1283 // If this is a non-trivial bool computation, make sure to truncate down to
1284 // a 1 bit value. This is important because we want "add i1 x, y" to return
1285 // "0" when x and y are true, not "2" for example.
1286 bool NeedBoolTrunc = false;
1287 if (I.getType() == Type::getInt1Ty(I.getContext()) &&
1288 !isa<ICmpInst>(I) && !isa<FCmpInst>(I))
1289 NeedBoolTrunc = true;
1301 void CWriter::writeOperandInternal(Value *Operand, bool Static) {
1302 if (Instruction *I = dyn_cast<Instruction>(Operand))
1303 // Should we inline this instruction to build a tree?
1304 if (isInlinableInst(*I) && !isDirectAlloca(I)) {
1306 writeInstComputationInline(*I);
1311 Constant* CPV = dyn_cast<Constant>(Operand);
1313 if (CPV && !isa<GlobalValue>(CPV))
1314 printConstant(CPV, Static);
1316 Out << GetValueName(Operand);
1319 void CWriter::writeOperand(Value *Operand, bool Static) {
1320 bool isAddressImplicit = isAddressExposed(Operand);
1321 if (isAddressImplicit)
1322 Out << "(&"; // Global variables are referenced as their addresses by llvm
1324 writeOperandInternal(Operand, Static);
1326 if (isAddressImplicit)
1330 // Some instructions need to have their result value casted back to the
1331 // original types because their operands were casted to the expected type.
1332 // This function takes care of detecting that case and printing the cast
1333 // for the Instruction.
1334 bool CWriter::writeInstructionCast(const Instruction &I) {
1335 const Type *Ty = I.getOperand(0)->getType();
1336 switch (I.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:
1346 printSimpleType(Out, Ty, false);
1349 case Instruction::AShr:
1350 case Instruction::SRem:
1351 case Instruction::SDiv:
1353 printSimpleType(Out, Ty, true);
1361 // Write the operand with a cast to another type based on the Opcode being used.
1362 // This will be used in cases where an instruction has specific type
1363 // requirements (usually signedness) for its operands.
1364 void CWriter::writeOperandWithCast(Value* Operand, unsigned Opcode) {
1366 // Extract the operand's type, we'll need it.
1367 const Type* OpTy = Operand->getType();
1369 // Indicate whether to do the cast or not.
1370 bool shouldCast = false;
1372 // Indicate whether the cast should be to a signed type or not.
1373 bool castIsSigned = false;
1375 // Based on the Opcode for which this Operand is being written, determine
1376 // the new type to which the operand should be casted by setting the value
1377 // of OpTy. If we change OpTy, also set shouldCast to true.
1380 // for most instructions, it doesn't matter
1382 case Instruction::Add:
1383 case Instruction::Sub:
1384 case Instruction::Mul:
1385 // We need to cast integer arithmetic so that it is always performed
1386 // as unsigned, to avoid undefined behavior on overflow.
1387 case Instruction::LShr:
1388 case Instruction::UDiv:
1389 case Instruction::URem: // Cast to unsigned first
1391 castIsSigned = false;
1393 case Instruction::GetElementPtr:
1394 case Instruction::AShr:
1395 case Instruction::SDiv:
1396 case Instruction::SRem: // Cast to signed first
1398 castIsSigned = true;
1402 // Write out the casted operand if we should, otherwise just write the
1406 printSimpleType(Out, OpTy, castIsSigned);
1408 writeOperand(Operand);
1411 writeOperand(Operand);
1414 // Write the operand with a cast to another type based on the icmp predicate
1416 void CWriter::writeOperandWithCast(Value* Operand, const ICmpInst &Cmp) {
1417 // This has to do a cast to ensure the operand has the right signedness.
1418 // Also, if the operand is a pointer, we make sure to cast to an integer when
1419 // doing the comparison both for signedness and so that the C compiler doesn't
1420 // optimize things like "p < NULL" to false (p may contain an integer value
1422 bool shouldCast = Cmp.isRelational();
1424 // Write out the casted operand if we should, otherwise just write the
1427 writeOperand(Operand);
1431 // Should this be a signed comparison? If so, convert to signed.
1432 bool castIsSigned = Cmp.isSigned();
1434 // If the operand was a pointer, convert to a large integer type.
1435 const Type* OpTy = Operand->getType();
1436 if (OpTy->isPointerTy())
1437 OpTy = TD->getIntPtrType(Operand->getContext());
1440 printSimpleType(Out, OpTy, castIsSigned);
1442 writeOperand(Operand);
1446 // generateCompilerSpecificCode - This is where we add conditional compilation
1447 // directives to cater to specific compilers as need be.
1449 static void generateCompilerSpecificCode(formatted_raw_ostream& Out,
1450 const TargetData *TD) {
1451 // Alloca is hard to get, and we don't want to include stdlib.h here.
1452 Out << "/* get a declaration for alloca */\n"
1453 << "#if defined(__CYGWIN__) || defined(__MINGW32__)\n"
1454 << "#define alloca(x) __builtin_alloca((x))\n"
1455 << "#define _alloca(x) __builtin_alloca((x))\n"
1456 << "#elif defined(__APPLE__)\n"
1457 << "extern void *__builtin_alloca(unsigned long);\n"
1458 << "#define alloca(x) __builtin_alloca(x)\n"
1459 << "#define longjmp _longjmp\n"
1460 << "#define setjmp _setjmp\n"
1461 << "#elif defined(__sun__)\n"
1462 << "#if defined(__sparcv9)\n"
1463 << "extern void *__builtin_alloca(unsigned long);\n"
1465 << "extern void *__builtin_alloca(unsigned int);\n"
1467 << "#define alloca(x) __builtin_alloca(x)\n"
1468 << "#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__arm__)\n"
1469 << "#define alloca(x) __builtin_alloca(x)\n"
1470 << "#elif defined(_MSC_VER)\n"
1471 << "#define inline _inline\n"
1472 << "#define alloca(x) _alloca(x)\n"
1474 << "#include <alloca.h>\n"
1477 // We output GCC specific attributes to preserve 'linkonce'ness on globals.
1478 // If we aren't being compiled with GCC, just drop these attributes.
1479 Out << "#ifndef __GNUC__ /* Can only support \"linkonce\" vars with GCC */\n"
1480 << "#define __attribute__(X)\n"
1483 // On Mac OS X, "external weak" is spelled "__attribute__((weak_import))".
1484 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1485 << "#define __EXTERNAL_WEAK__ __attribute__((weak_import))\n"
1486 << "#elif defined(__GNUC__)\n"
1487 << "#define __EXTERNAL_WEAK__ __attribute__((weak))\n"
1489 << "#define __EXTERNAL_WEAK__\n"
1492 // For now, turn off the weak linkage attribute on Mac OS X. (See above.)
1493 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1494 << "#define __ATTRIBUTE_WEAK__\n"
1495 << "#elif defined(__GNUC__)\n"
1496 << "#define __ATTRIBUTE_WEAK__ __attribute__((weak))\n"
1498 << "#define __ATTRIBUTE_WEAK__\n"
1501 // Add hidden visibility support. FIXME: APPLE_CC?
1502 Out << "#if defined(__GNUC__)\n"
1503 << "#define __HIDDEN__ __attribute__((visibility(\"hidden\")))\n"
1506 // Define NaN and Inf as GCC builtins if using GCC, as 0 otherwise
1507 // From the GCC documentation:
1509 // double __builtin_nan (const char *str)
1511 // This is an implementation of the ISO C99 function nan.
1513 // Since ISO C99 defines this function in terms of strtod, which we do
1514 // not implement, a description of the parsing is in order. The string is
1515 // parsed as by strtol; that is, the base is recognized by leading 0 or
1516 // 0x prefixes. The number parsed is placed in the significand such that
1517 // the least significant bit of the number is at the least significant
1518 // bit of the significand. The number is truncated to fit the significand
1519 // field provided. The significand is forced to be a quiet NaN.
1521 // This function, if given a string literal, is evaluated early enough
1522 // that it is considered a compile-time constant.
1524 // float __builtin_nanf (const char *str)
1526 // Similar to __builtin_nan, except the return type is float.
1528 // double __builtin_inf (void)
1530 // Similar to __builtin_huge_val, except a warning is generated if the
1531 // target floating-point format does not support infinities. This
1532 // function is suitable for implementing the ISO C99 macro INFINITY.
1534 // float __builtin_inff (void)
1536 // Similar to __builtin_inf, except the return type is float.
1537 Out << "#ifdef __GNUC__\n"
1538 << "#define LLVM_NAN(NanStr) __builtin_nan(NanStr) /* Double */\n"
1539 << "#define LLVM_NANF(NanStr) __builtin_nanf(NanStr) /* Float */\n"
1540 << "#define LLVM_NANS(NanStr) __builtin_nans(NanStr) /* Double */\n"
1541 << "#define LLVM_NANSF(NanStr) __builtin_nansf(NanStr) /* Float */\n"
1542 << "#define LLVM_INF __builtin_inf() /* Double */\n"
1543 << "#define LLVM_INFF __builtin_inff() /* Float */\n"
1544 << "#define LLVM_PREFETCH(addr,rw,locality) "
1545 "__builtin_prefetch(addr,rw,locality)\n"
1546 << "#define __ATTRIBUTE_CTOR__ __attribute__((constructor))\n"
1547 << "#define __ATTRIBUTE_DTOR__ __attribute__((destructor))\n"
1548 << "#define LLVM_ASM __asm__\n"
1550 << "#define LLVM_NAN(NanStr) ((double)0.0) /* Double */\n"
1551 << "#define LLVM_NANF(NanStr) 0.0F /* Float */\n"
1552 << "#define LLVM_NANS(NanStr) ((double)0.0) /* Double */\n"
1553 << "#define LLVM_NANSF(NanStr) 0.0F /* Float */\n"
1554 << "#define LLVM_INF ((double)0.0) /* Double */\n"
1555 << "#define LLVM_INFF 0.0F /* Float */\n"
1556 << "#define LLVM_PREFETCH(addr,rw,locality) /* PREFETCH */\n"
1557 << "#define __ATTRIBUTE_CTOR__\n"
1558 << "#define __ATTRIBUTE_DTOR__\n"
1559 << "#define LLVM_ASM(X)\n"
1562 Out << "#if __GNUC__ < 4 /* Old GCC's, or compilers not GCC */ \n"
1563 << "#define __builtin_stack_save() 0 /* not implemented */\n"
1564 << "#define __builtin_stack_restore(X) /* noop */\n"
1567 // Output typedefs for 128-bit integers. If these are needed with a
1568 // 32-bit target or with a C compiler that doesn't support mode(TI),
1569 // more drastic measures will be needed.
1570 Out << "#if __GNUC__ && __LP64__ /* 128-bit integer types */\n"
1571 << "typedef int __attribute__((mode(TI))) llvmInt128;\n"
1572 << "typedef unsigned __attribute__((mode(TI))) llvmUInt128;\n"
1575 // Output target-specific code that should be inserted into main.
1576 Out << "#define CODE_FOR_MAIN() /* Any target-specific code for main()*/\n";
1579 /// FindStaticTors - Given a static ctor/dtor list, unpack its contents into
1580 /// the StaticTors set.
1581 static void FindStaticTors(GlobalVariable *GV, std::set<Function*> &StaticTors){
1582 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
1583 if (!InitList) return;
1585 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
1586 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
1587 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
1589 if (CS->getOperand(1)->isNullValue())
1590 return; // Found a null terminator, exit printing.
1591 Constant *FP = CS->getOperand(1);
1592 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
1594 FP = CE->getOperand(0);
1595 if (Function *F = dyn_cast<Function>(FP))
1596 StaticTors.insert(F);
1600 enum SpecialGlobalClass {
1602 GlobalCtors, GlobalDtors,
1606 /// getGlobalVariableClass - If this is a global that is specially recognized
1607 /// by LLVM, return a code that indicates how we should handle it.
1608 static SpecialGlobalClass getGlobalVariableClass(const GlobalVariable *GV) {
1609 // If this is a global ctors/dtors list, handle it now.
1610 if (GV->hasAppendingLinkage() && GV->use_empty()) {
1611 if (GV->getName() == "llvm.global_ctors")
1613 else if (GV->getName() == "llvm.global_dtors")
1617 // Otherwise, if it is other metadata, don't print it. This catches things
1618 // like debug information.
1619 if (GV->getSection() == "llvm.metadata")
1625 // PrintEscapedString - Print each character of the specified string, escaping
1626 // it if it is not printable or if it is an escape char.
1627 static void PrintEscapedString(const char *Str, unsigned Length,
1629 for (unsigned i = 0; i != Length; ++i) {
1630 unsigned char C = Str[i];
1631 if (isprint(C) && C != '\\' && C != '"')
1640 Out << "\\x" << hexdigit(C >> 4) << hexdigit(C & 0x0F);
1644 // PrintEscapedString - Print each character of the specified string, escaping
1645 // it if it is not printable or if it is an escape char.
1646 static void PrintEscapedString(const std::string &Str, raw_ostream &Out) {
1647 PrintEscapedString(Str.c_str(), Str.size(), Out);
1650 bool CWriter::doInitialization(Module &M) {
1651 FunctionPass::doInitialization(M);
1656 TD = new TargetData(&M);
1657 IL = new IntrinsicLowering(*TD);
1658 IL->AddPrototypes(M);
1661 std::string Triple = TheModule->getTargetTriple();
1663 Triple = llvm::sys::getHostTriple();
1666 if (const Target *Match = TargetRegistry::lookupTarget(Triple, E))
1667 TAsm = Match->createAsmInfo(Triple);
1669 TAsm = new CBEMCAsmInfo();
1670 TCtx = new MCContext(*TAsm, NULL);
1671 Mang = new Mangler(*TCtx, *TD);
1673 // Keep track of which functions are static ctors/dtors so they can have
1674 // an attribute added to their prototypes.
1675 std::set<Function*> StaticCtors, StaticDtors;
1676 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1678 switch (getGlobalVariableClass(I)) {
1681 FindStaticTors(I, StaticCtors);
1684 FindStaticTors(I, StaticDtors);
1689 // get declaration for alloca
1690 Out << "/* Provide Declarations */\n";
1691 Out << "#include <stdarg.h>\n"; // Varargs support
1692 Out << "#include <setjmp.h>\n"; // Unwind support
1693 Out << "#include <limits.h>\n"; // With overflow intrinsics support.
1694 generateCompilerSpecificCode(Out, TD);
1696 // Provide a definition for `bool' if not compiling with a C++ compiler.
1698 << "#ifndef __cplusplus\ntypedef unsigned char bool;\n#endif\n"
1700 << "\n\n/* Support for floating point constants */\n"
1701 << "typedef unsigned long long ConstantDoubleTy;\n"
1702 << "typedef unsigned int ConstantFloatTy;\n"
1703 << "typedef struct { unsigned long long f1; unsigned short f2; "
1704 "unsigned short pad[3]; } ConstantFP80Ty;\n"
1705 // This is used for both kinds of 128-bit long double; meaning differs.
1706 << "typedef struct { unsigned long long f1; unsigned long long f2; }"
1707 " ConstantFP128Ty;\n"
1708 << "\n\n/* Global Declarations */\n";
1710 // First output all the declarations for the program, because C requires
1711 // Functions & globals to be declared before they are used.
1713 if (!M.getModuleInlineAsm().empty()) {
1714 Out << "/* Module asm statements */\n"
1717 // Split the string into lines, to make it easier to read the .ll file.
1718 std::string Asm = M.getModuleInlineAsm();
1720 size_t NewLine = Asm.find_first_of('\n', CurPos);
1721 while (NewLine != std::string::npos) {
1722 // We found a newline, print the portion of the asm string from the
1723 // last newline up to this newline.
1725 PrintEscapedString(std::string(Asm.begin()+CurPos, Asm.begin()+NewLine),
1729 NewLine = Asm.find_first_of('\n', CurPos);
1732 PrintEscapedString(std::string(Asm.begin()+CurPos, Asm.end()), Out);
1734 << "/* End Module asm statements */\n";
1737 // Loop over the symbol table, emitting all named constants.
1740 // Global variable declarations...
1741 if (!M.global_empty()) {
1742 Out << "\n/* External Global Variable Declarations */\n";
1743 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1746 if (I->hasExternalLinkage() || I->hasExternalWeakLinkage() ||
1747 I->hasCommonLinkage())
1749 else if (I->hasDLLImportLinkage())
1750 Out << "__declspec(dllimport) ";
1752 continue; // Internal Global
1754 // Thread Local Storage
1755 if (I->isThreadLocal())
1758 printType(Out, I->getType()->getElementType(), false, GetValueName(I));
1760 if (I->hasExternalWeakLinkage())
1761 Out << " __EXTERNAL_WEAK__";
1766 // Function declarations
1767 Out << "\n/* Function Declarations */\n";
1768 Out << "double fmod(double, double);\n"; // Support for FP rem
1769 Out << "float fmodf(float, float);\n";
1770 Out << "long double fmodl(long double, long double);\n";
1772 // Store the intrinsics which will be declared/defined below.
1773 SmallVector<const Function*, 8> intrinsicsToDefine;
1775 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
1776 // Don't print declarations for intrinsic functions.
1777 // Store the used intrinsics, which need to be explicitly defined.
1778 if (I->isIntrinsic()) {
1779 switch (I->getIntrinsicID()) {
1782 case Intrinsic::uadd_with_overflow:
1783 case Intrinsic::sadd_with_overflow:
1784 intrinsicsToDefine.push_back(I);
1790 if (I->getName() == "setjmp" ||
1791 I->getName() == "longjmp" || I->getName() == "_setjmp")
1794 if (I->hasExternalWeakLinkage())
1796 printFunctionSignature(I, true);
1797 if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
1798 Out << " __ATTRIBUTE_WEAK__";
1799 if (I->hasExternalWeakLinkage())
1800 Out << " __EXTERNAL_WEAK__";
1801 if (StaticCtors.count(I))
1802 Out << " __ATTRIBUTE_CTOR__";
1803 if (StaticDtors.count(I))
1804 Out << " __ATTRIBUTE_DTOR__";
1805 if (I->hasHiddenVisibility())
1806 Out << " __HIDDEN__";
1808 if (I->hasName() && I->getName()[0] == 1)
1809 Out << " LLVM_ASM(\"" << I->getName().substr(1) << "\")";
1814 // Output the global variable declarations
1815 if (!M.global_empty()) {
1816 Out << "\n\n/* Global Variable Declarations */\n";
1817 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1819 if (!I->isDeclaration()) {
1820 // Ignore special globals, such as debug info.
1821 if (getGlobalVariableClass(I))
1824 if (I->hasLocalLinkage())
1829 // Thread Local Storage
1830 if (I->isThreadLocal())
1833 printType(Out, I->getType()->getElementType(), false,
1836 if (I->hasLinkOnceLinkage())
1837 Out << " __attribute__((common))";
1838 else if (I->hasCommonLinkage()) // FIXME is this right?
1839 Out << " __ATTRIBUTE_WEAK__";
1840 else if (I->hasWeakLinkage())
1841 Out << " __ATTRIBUTE_WEAK__";
1842 else if (I->hasExternalWeakLinkage())
1843 Out << " __EXTERNAL_WEAK__";
1844 if (I->hasHiddenVisibility())
1845 Out << " __HIDDEN__";
1850 // Output the global variable definitions and contents...
1851 if (!M.global_empty()) {
1852 Out << "\n\n/* Global Variable Definitions and Initialization */\n";
1853 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1855 if (!I->isDeclaration()) {
1856 // Ignore special globals, such as debug info.
1857 if (getGlobalVariableClass(I))
1860 if (I->hasLocalLinkage())
1862 else if (I->hasDLLImportLinkage())
1863 Out << "__declspec(dllimport) ";
1864 else if (I->hasDLLExportLinkage())
1865 Out << "__declspec(dllexport) ";
1867 // Thread Local Storage
1868 if (I->isThreadLocal())
1871 printType(Out, I->getType()->getElementType(), false,
1873 if (I->hasLinkOnceLinkage())
1874 Out << " __attribute__((common))";
1875 else if (I->hasWeakLinkage())
1876 Out << " __ATTRIBUTE_WEAK__";
1877 else if (I->hasCommonLinkage())
1878 Out << " __ATTRIBUTE_WEAK__";
1880 if (I->hasHiddenVisibility())
1881 Out << " __HIDDEN__";
1883 // If the initializer is not null, emit the initializer. If it is null,
1884 // we try to avoid emitting large amounts of zeros. The problem with
1885 // this, however, occurs when the variable has weak linkage. In this
1886 // case, the assembler will complain about the variable being both weak
1887 // and common, so we disable this optimization.
1888 // FIXME common linkage should avoid this problem.
1889 if (!I->getInitializer()->isNullValue()) {
1891 writeOperand(I->getInitializer(), true);
1892 } else if (I->hasWeakLinkage()) {
1893 // We have to specify an initializer, but it doesn't have to be
1894 // complete. If the value is an aggregate, print out { 0 }, and let
1895 // the compiler figure out the rest of the zeros.
1897 if (I->getInitializer()->getType()->isStructTy() ||
1898 I->getInitializer()->getType()->isVectorTy()) {
1900 } else if (I->getInitializer()->getType()->isArrayTy()) {
1901 // As with structs and vectors, but with an extra set of braces
1902 // because arrays are wrapped in structs.
1905 // Just print it out normally.
1906 writeOperand(I->getInitializer(), true);
1914 Out << "\n\n/* Function Bodies */\n";
1916 // Emit some helper functions for dealing with FCMP instruction's
1918 Out << "static inline int llvm_fcmp_ord(double X, double Y) { ";
1919 Out << "return X == X && Y == Y; }\n";
1920 Out << "static inline int llvm_fcmp_uno(double X, double Y) { ";
1921 Out << "return X != X || Y != Y; }\n";
1922 Out << "static inline int llvm_fcmp_ueq(double X, double Y) { ";
1923 Out << "return X == Y || llvm_fcmp_uno(X, Y); }\n";
1924 Out << "static inline int llvm_fcmp_une(double X, double Y) { ";
1925 Out << "return X != Y; }\n";
1926 Out << "static inline int llvm_fcmp_ult(double X, double Y) { ";
1927 Out << "return X < Y || llvm_fcmp_uno(X, Y); }\n";
1928 Out << "static inline int llvm_fcmp_ugt(double X, double Y) { ";
1929 Out << "return X > Y || llvm_fcmp_uno(X, Y); }\n";
1930 Out << "static inline int llvm_fcmp_ule(double X, double Y) { ";
1931 Out << "return X <= Y || llvm_fcmp_uno(X, Y); }\n";
1932 Out << "static inline int llvm_fcmp_uge(double X, double Y) { ";
1933 Out << "return X >= Y || llvm_fcmp_uno(X, Y); }\n";
1934 Out << "static inline int llvm_fcmp_oeq(double X, double Y) { ";
1935 Out << "return X == Y ; }\n";
1936 Out << "static inline int llvm_fcmp_one(double X, double Y) { ";
1937 Out << "return X != Y && llvm_fcmp_ord(X, Y); }\n";
1938 Out << "static inline int llvm_fcmp_olt(double X, double Y) { ";
1939 Out << "return X < Y ; }\n";
1940 Out << "static inline int llvm_fcmp_ogt(double X, double Y) { ";
1941 Out << "return X > Y ; }\n";
1942 Out << "static inline int llvm_fcmp_ole(double X, double Y) { ";
1943 Out << "return X <= Y ; }\n";
1944 Out << "static inline int llvm_fcmp_oge(double X, double Y) { ";
1945 Out << "return X >= Y ; }\n";
1947 // Emit definitions of the intrinsics.
1948 for (SmallVector<const Function*, 8>::const_iterator
1949 I = intrinsicsToDefine.begin(),
1950 E = intrinsicsToDefine.end(); I != E; ++I) {
1951 printIntrinsicDefinition(**I, Out);
1958 /// Output all floating point constants that cannot be printed accurately...
1959 void CWriter::printFloatingPointConstants(Function &F) {
1960 // Scan the module for floating point constants. If any FP constant is used
1961 // in the function, we want to redirect it here so that we do not depend on
1962 // the precision of the printed form, unless the printed form preserves
1965 for (constant_iterator I = constant_begin(&F), E = constant_end(&F);
1967 printFloatingPointConstants(*I);
1972 void CWriter::printFloatingPointConstants(const Constant *C) {
1973 // If this is a constant expression, recursively check for constant fp values.
1974 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
1975 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i)
1976 printFloatingPointConstants(CE->getOperand(i));
1980 // Otherwise, check for a FP constant that we need to print.
1981 const ConstantFP *FPC = dyn_cast<ConstantFP>(C);
1983 // Do not put in FPConstantMap if safe.
1984 isFPCSafeToPrint(FPC) ||
1985 // Already printed this constant?
1986 FPConstantMap.count(FPC))
1989 FPConstantMap[FPC] = FPCounter; // Number the FP constants
1991 if (FPC->getType() == Type::getDoubleTy(FPC->getContext())) {
1992 double Val = FPC->getValueAPF().convertToDouble();
1993 uint64_t i = FPC->getValueAPF().bitcastToAPInt().getZExtValue();
1994 Out << "static const ConstantDoubleTy FPConstant" << FPCounter++
1995 << " = 0x" << utohexstr(i)
1996 << "ULL; /* " << Val << " */\n";
1997 } else if (FPC->getType() == Type::getFloatTy(FPC->getContext())) {
1998 float Val = FPC->getValueAPF().convertToFloat();
1999 uint32_t i = (uint32_t)FPC->getValueAPF().bitcastToAPInt().
2001 Out << "static const ConstantFloatTy FPConstant" << FPCounter++
2002 << " = 0x" << utohexstr(i)
2003 << "U; /* " << Val << " */\n";
2004 } else if (FPC->getType() == Type::getX86_FP80Ty(FPC->getContext())) {
2005 // api needed to prevent premature destruction
2006 APInt api = FPC->getValueAPF().bitcastToAPInt();
2007 const uint64_t *p = api.getRawData();
2008 Out << "static const ConstantFP80Ty FPConstant" << FPCounter++
2009 << " = { 0x" << utohexstr(p[0])
2010 << "ULL, 0x" << utohexstr((uint16_t)p[1]) << ",{0,0,0}"
2011 << "}; /* Long double constant */\n";
2012 } else if (FPC->getType() == Type::getPPC_FP128Ty(FPC->getContext()) ||
2013 FPC->getType() == Type::getFP128Ty(FPC->getContext())) {
2014 APInt api = FPC->getValueAPF().bitcastToAPInt();
2015 const uint64_t *p = api.getRawData();
2016 Out << "static const ConstantFP128Ty FPConstant" << FPCounter++
2018 << utohexstr(p[0]) << ", 0x" << utohexstr(p[1])
2019 << "}; /* Long double constant */\n";
2022 llvm_unreachable("Unknown float type!");
2027 /// printSymbolTable - Run through symbol table looking for type names. If a
2028 /// type name is found, emit its declaration...
2030 void CWriter::printModuleTypes() {
2031 Out << "/* Helper union for bitcasts */\n";
2032 Out << "typedef union {\n";
2033 Out << " unsigned int Int32;\n";
2034 Out << " unsigned long long Int64;\n";
2035 Out << " float Float;\n";
2036 Out << " double Double;\n";
2037 Out << "} llvmBitCastUnion;\n";
2039 // Get all of the struct types used in the module.
2040 std::vector<StructType*> StructTypes;
2041 TheModule->findUsedStructTypes(StructTypes);
2043 if (StructTypes.empty()) return;
2045 Out << "/* Structure forward decls */\n";
2047 unsigned NextTypeID = 0;
2049 // If any of them are missing names, add a unique ID to UnnamedStructIDs.
2050 // Print out forward declarations for structure types.
2051 for (unsigned i = 0, e = StructTypes.size(); i != e; ++i) {
2052 StructType *ST = StructTypes[i];
2054 if (ST->isAnonymous() || ST->getName().empty())
2055 UnnamedStructIDs[ST] = NextTypeID++;
2057 std::string Name = getStructName(ST);
2059 Out << "typedef struct " << Name << ' ' << Name << ";\n";
2064 // Keep track of which structures have been printed so far.
2065 SmallPtrSet<const Type *, 16> StructPrinted;
2067 // Loop over all structures then push them into the stack so they are
2068 // printed in the correct order.
2070 Out << "/* Structure contents */\n";
2071 for (unsigned i = 0, e = StructTypes.size(); i != e; ++i)
2072 if (StructTypes[i]->isStructTy())
2073 // Only print out used types!
2074 printContainedStructs(StructTypes[i], StructPrinted);
2077 // Push the struct onto the stack and recursively push all structs
2078 // this one depends on.
2080 // TODO: Make this work properly with vector types
2082 void CWriter::printContainedStructs(const Type *Ty,
2083 SmallPtrSet<const Type *, 16> &StructPrinted) {
2084 // Don't walk through pointers.
2085 if (Ty->isPointerTy() || Ty->isPrimitiveType() || Ty->isIntegerTy())
2088 // Print all contained types first.
2089 for (Type::subtype_iterator I = Ty->subtype_begin(),
2090 E = Ty->subtype_end(); I != E; ++I)
2091 printContainedStructs(*I, StructPrinted);
2093 if (const StructType *ST = dyn_cast<StructType>(Ty)) {
2094 // Check to see if we have already printed this struct.
2095 if (!StructPrinted.insert(Ty)) return;
2097 // Print structure type out.
2098 printType(Out, ST, false, getStructName(ST), true);
2103 void CWriter::printFunctionSignature(const Function *F, bool Prototype) {
2104 /// isStructReturn - Should this function actually return a struct by-value?
2105 bool isStructReturn = F->hasStructRetAttr();
2107 if (F->hasLocalLinkage()) Out << "static ";
2108 if (F->hasDLLImportLinkage()) Out << "__declspec(dllimport) ";
2109 if (F->hasDLLExportLinkage()) Out << "__declspec(dllexport) ";
2110 switch (F->getCallingConv()) {
2111 case CallingConv::X86_StdCall:
2112 Out << "__attribute__((stdcall)) ";
2114 case CallingConv::X86_FastCall:
2115 Out << "__attribute__((fastcall)) ";
2117 case CallingConv::X86_ThisCall:
2118 Out << "__attribute__((thiscall)) ";
2124 // Loop over the arguments, printing them...
2125 const FunctionType *FT = cast<FunctionType>(F->getFunctionType());
2126 const AttrListPtr &PAL = F->getAttributes();
2129 raw_string_ostream FunctionInnards(tstr);
2131 // Print out the name...
2132 FunctionInnards << GetValueName(F) << '(';
2134 bool PrintedArg = false;
2135 if (!F->isDeclaration()) {
2136 if (!F->arg_empty()) {
2137 Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
2140 // If this is a struct-return function, don't print the hidden
2141 // struct-return argument.
2142 if (isStructReturn) {
2143 assert(I != E && "Invalid struct return function!");
2148 std::string ArgName;
2149 for (; I != E; ++I) {
2150 if (PrintedArg) FunctionInnards << ", ";
2151 if (I->hasName() || !Prototype)
2152 ArgName = GetValueName(I);
2155 const Type *ArgTy = I->getType();
2156 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2157 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2158 ByValParams.insert(I);
2160 printType(FunctionInnards, ArgTy,
2161 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt),
2168 // Loop over the arguments, printing them.
2169 FunctionType::param_iterator I = FT->param_begin(), E = FT->param_end();
2172 // If this is a struct-return function, don't print the hidden
2173 // struct-return argument.
2174 if (isStructReturn) {
2175 assert(I != E && "Invalid struct return function!");
2180 for (; I != E; ++I) {
2181 if (PrintedArg) FunctionInnards << ", ";
2182 const Type *ArgTy = *I;
2183 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2184 assert(ArgTy->isPointerTy());
2185 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2187 printType(FunctionInnards, ArgTy,
2188 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt));
2194 if (!PrintedArg && FT->isVarArg()) {
2195 FunctionInnards << "int vararg_dummy_arg";
2199 // Finish printing arguments... if this is a vararg function, print the ...,
2200 // unless there are no known types, in which case, we just emit ().
2202 if (FT->isVarArg() && PrintedArg) {
2203 FunctionInnards << ",..."; // Output varargs portion of signature!
2204 } else if (!FT->isVarArg() && !PrintedArg) {
2205 FunctionInnards << "void"; // ret() -> ret(void) in C.
2207 FunctionInnards << ')';
2209 // Get the return tpe for the function.
2211 if (!isStructReturn)
2212 RetTy = F->getReturnType();
2214 // If this is a struct-return function, print the struct-return type.
2215 RetTy = cast<PointerType>(FT->getParamType(0))->getElementType();
2218 // Print out the return type and the signature built above.
2219 printType(Out, RetTy,
2220 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt),
2221 FunctionInnards.str());
2224 static inline bool isFPIntBitCast(const Instruction &I) {
2225 if (!isa<BitCastInst>(I))
2227 const Type *SrcTy = I.getOperand(0)->getType();
2228 const Type *DstTy = I.getType();
2229 return (SrcTy->isFloatingPointTy() && DstTy->isIntegerTy()) ||
2230 (DstTy->isFloatingPointTy() && SrcTy->isIntegerTy());
2233 void CWriter::printFunction(Function &F) {
2234 /// isStructReturn - Should this function actually return a struct by-value?
2235 bool isStructReturn = F.hasStructRetAttr();
2237 printFunctionSignature(&F, false);
2240 // If this is a struct return function, handle the result with magic.
2241 if (isStructReturn) {
2242 const Type *StructTy =
2243 cast<PointerType>(F.arg_begin()->getType())->getElementType();
2245 printType(Out, StructTy, false, "StructReturn");
2246 Out << "; /* Struct return temporary */\n";
2249 printType(Out, F.arg_begin()->getType(), false,
2250 GetValueName(F.arg_begin()));
2251 Out << " = &StructReturn;\n";
2254 bool PrintedVar = false;
2256 // print local variable information for the function
2257 for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I) {
2258 if (const AllocaInst *AI = isDirectAlloca(&*I)) {
2260 printType(Out, AI->getAllocatedType(), false, GetValueName(AI));
2261 Out << "; /* Address-exposed local */\n";
2263 } else if (I->getType() != Type::getVoidTy(F.getContext()) &&
2264 !isInlinableInst(*I)) {
2266 printType(Out, I->getType(), false, GetValueName(&*I));
2269 if (isa<PHINode>(*I)) { // Print out PHI node temporaries as well...
2271 printType(Out, I->getType(), false,
2272 GetValueName(&*I)+"__PHI_TEMPORARY");
2277 // We need a temporary for the BitCast to use so it can pluck a value out
2278 // of a union to do the BitCast. This is separate from the need for a
2279 // variable to hold the result of the BitCast.
2280 if (isFPIntBitCast(*I)) {
2281 Out << " llvmBitCastUnion " << GetValueName(&*I)
2282 << "__BITCAST_TEMPORARY;\n";
2290 if (F.hasExternalLinkage() && F.getName() == "main")
2291 Out << " CODE_FOR_MAIN();\n";
2293 // print the basic blocks
2294 for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
2295 if (Loop *L = LI->getLoopFor(BB)) {
2296 if (L->getHeader() == BB && L->getParentLoop() == 0)
2299 printBasicBlock(BB);
2306 void CWriter::printLoop(Loop *L) {
2307 Out << " do { /* Syntactic loop '" << L->getHeader()->getName()
2308 << "' to make GCC happy */\n";
2309 for (unsigned i = 0, e = L->getBlocks().size(); i != e; ++i) {
2310 BasicBlock *BB = L->getBlocks()[i];
2311 Loop *BBLoop = LI->getLoopFor(BB);
2313 printBasicBlock(BB);
2314 else if (BB == BBLoop->getHeader() && BBLoop->getParentLoop() == L)
2317 Out << " } while (1); /* end of syntactic loop '"
2318 << L->getHeader()->getName() << "' */\n";
2321 void CWriter::printBasicBlock(BasicBlock *BB) {
2323 // Don't print the label for the basic block if there are no uses, or if
2324 // the only terminator use is the predecessor basic block's terminator.
2325 // We have to scan the use list because PHI nodes use basic blocks too but
2326 // do not require a label to be generated.
2328 bool NeedsLabel = false;
2329 for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI)
2330 if (isGotoCodeNecessary(*PI, BB)) {
2335 if (NeedsLabel) Out << GetValueName(BB) << ":\n";
2337 // Output all of the instructions in the basic block...
2338 for (BasicBlock::iterator II = BB->begin(), E = --BB->end(); II != E;
2340 if (!isInlinableInst(*II) && !isDirectAlloca(II)) {
2341 if (II->getType() != Type::getVoidTy(BB->getContext()) &&
2346 writeInstComputationInline(*II);
2351 // Don't emit prefix or suffix for the terminator.
2352 visit(*BB->getTerminator());
2356 // Specific Instruction type classes... note that all of the casts are
2357 // necessary because we use the instruction classes as opaque types...
2359 void CWriter::visitReturnInst(ReturnInst &I) {
2360 // If this is a struct return function, return the temporary struct.
2361 bool isStructReturn = I.getParent()->getParent()->hasStructRetAttr();
2363 if (isStructReturn) {
2364 Out << " return StructReturn;\n";
2368 // Don't output a void return if this is the last basic block in the function
2369 if (I.getNumOperands() == 0 &&
2370 &*--I.getParent()->getParent()->end() == I.getParent() &&
2371 !I.getParent()->size() == 1) {
2376 if (I.getNumOperands()) {
2378 writeOperand(I.getOperand(0));
2383 void CWriter::visitSwitchInst(SwitchInst &SI) {
2386 writeOperand(SI.getOperand(0));
2387 Out << ") {\n default:\n";
2388 printPHICopiesForSuccessor (SI.getParent(), SI.getDefaultDest(), 2);
2389 printBranchToBlock(SI.getParent(), SI.getDefaultDest(), 2);
2391 for (unsigned i = 2, e = SI.getNumOperands(); i != e; i += 2) {
2393 writeOperand(SI.getOperand(i));
2395 BasicBlock *Succ = cast<BasicBlock>(SI.getOperand(i+1));
2396 printPHICopiesForSuccessor (SI.getParent(), Succ, 2);
2397 printBranchToBlock(SI.getParent(), Succ, 2);
2398 if (Function::iterator(Succ) == llvm::next(Function::iterator(SI.getParent())))
2404 void CWriter::visitIndirectBrInst(IndirectBrInst &IBI) {
2405 Out << " goto *(void*)(";
2406 writeOperand(IBI.getOperand(0));
2410 void CWriter::visitUnreachableInst(UnreachableInst &I) {
2411 Out << " /*UNREACHABLE*/;\n";
2414 bool CWriter::isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
2415 /// FIXME: This should be reenabled, but loop reordering safe!!
2418 if (llvm::next(Function::iterator(From)) != Function::iterator(To))
2419 return true; // Not the direct successor, we need a goto.
2421 //isa<SwitchInst>(From->getTerminator())
2423 if (LI->getLoopFor(From) != LI->getLoopFor(To))
2428 void CWriter::printPHICopiesForSuccessor (BasicBlock *CurBlock,
2429 BasicBlock *Successor,
2431 for (BasicBlock::iterator I = Successor->begin(); isa<PHINode>(I); ++I) {
2432 PHINode *PN = cast<PHINode>(I);
2433 // Now we have to do the printing.
2434 Value *IV = PN->getIncomingValueForBlock(CurBlock);
2435 if (!isa<UndefValue>(IV)) {
2436 Out << std::string(Indent, ' ');
2437 Out << " " << GetValueName(I) << "__PHI_TEMPORARY = ";
2439 Out << "; /* for PHI node */\n";
2444 void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
2446 if (isGotoCodeNecessary(CurBB, Succ)) {
2447 Out << std::string(Indent, ' ') << " goto ";
2453 // Branch instruction printing - Avoid printing out a branch to a basic block
2454 // that immediately succeeds the current one.
2456 void CWriter::visitBranchInst(BranchInst &I) {
2458 if (I.isConditional()) {
2459 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(0))) {
2461 writeOperand(I.getCondition());
2464 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 2);
2465 printBranchToBlock(I.getParent(), I.getSuccessor(0), 2);
2467 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(1))) {
2468 Out << " } else {\n";
2469 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2470 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2473 // First goto not necessary, assume second one is...
2475 writeOperand(I.getCondition());
2478 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2479 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2484 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 0);
2485 printBranchToBlock(I.getParent(), I.getSuccessor(0), 0);
2490 // PHI nodes get copied into temporary values at the end of predecessor basic
2491 // blocks. We now need to copy these temporary values into the REAL value for
2493 void CWriter::visitPHINode(PHINode &I) {
2495 Out << "__PHI_TEMPORARY";
2499 void CWriter::visitBinaryOperator(Instruction &I) {
2500 // binary instructions, shift instructions, setCond instructions.
2501 assert(!I.getType()->isPointerTy());
2503 // We must cast the results of binary operations which might be promoted.
2504 bool needsCast = false;
2505 if ((I.getType() == Type::getInt8Ty(I.getContext())) ||
2506 (I.getType() == Type::getInt16Ty(I.getContext()))
2507 || (I.getType() == Type::getFloatTy(I.getContext()))) {
2510 printType(Out, I.getType(), false);
2514 // If this is a negation operation, print it out as such. For FP, we don't
2515 // want to print "-0.0 - X".
2516 if (BinaryOperator::isNeg(&I)) {
2518 writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
2520 } else if (BinaryOperator::isFNeg(&I)) {
2522 writeOperand(BinaryOperator::getFNegArgument(cast<BinaryOperator>(&I)));
2524 } else if (I.getOpcode() == Instruction::FRem) {
2525 // Output a call to fmod/fmodf instead of emitting a%b
2526 if (I.getType() == Type::getFloatTy(I.getContext()))
2528 else if (I.getType() == Type::getDoubleTy(I.getContext()))
2530 else // all 3 flavors of long double
2532 writeOperand(I.getOperand(0));
2534 writeOperand(I.getOperand(1));
2538 // Write out the cast of the instruction's value back to the proper type
2540 bool NeedsClosingParens = writeInstructionCast(I);
2542 // Certain instructions require the operand to be forced to a specific type
2543 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2544 // below for operand 1
2545 writeOperandWithCast(I.getOperand(0), I.getOpcode());
2547 switch (I.getOpcode()) {
2548 case Instruction::Add:
2549 case Instruction::FAdd: Out << " + "; break;
2550 case Instruction::Sub:
2551 case Instruction::FSub: Out << " - "; break;
2552 case Instruction::Mul:
2553 case Instruction::FMul: Out << " * "; break;
2554 case Instruction::URem:
2555 case Instruction::SRem:
2556 case Instruction::FRem: Out << " % "; break;
2557 case Instruction::UDiv:
2558 case Instruction::SDiv:
2559 case Instruction::FDiv: Out << " / "; break;
2560 case Instruction::And: Out << " & "; break;
2561 case Instruction::Or: Out << " | "; break;
2562 case Instruction::Xor: Out << " ^ "; break;
2563 case Instruction::Shl : Out << " << "; break;
2564 case Instruction::LShr:
2565 case Instruction::AShr: Out << " >> "; break;
2568 errs() << "Invalid operator type!" << I;
2570 llvm_unreachable(0);
2573 writeOperandWithCast(I.getOperand(1), I.getOpcode());
2574 if (NeedsClosingParens)
2583 void CWriter::visitICmpInst(ICmpInst &I) {
2584 // We must cast the results of icmp which might be promoted.
2585 bool needsCast = false;
2587 // Write out the cast of the instruction's value back to the proper type
2589 bool NeedsClosingParens = writeInstructionCast(I);
2591 // Certain icmp predicate require the operand to be forced to a specific type
2592 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2593 // below for operand 1
2594 writeOperandWithCast(I.getOperand(0), I);
2596 switch (I.getPredicate()) {
2597 case ICmpInst::ICMP_EQ: Out << " == "; break;
2598 case ICmpInst::ICMP_NE: Out << " != "; break;
2599 case ICmpInst::ICMP_ULE:
2600 case ICmpInst::ICMP_SLE: Out << " <= "; break;
2601 case ICmpInst::ICMP_UGE:
2602 case ICmpInst::ICMP_SGE: Out << " >= "; break;
2603 case ICmpInst::ICMP_ULT:
2604 case ICmpInst::ICMP_SLT: Out << " < "; break;
2605 case ICmpInst::ICMP_UGT:
2606 case ICmpInst::ICMP_SGT: Out << " > "; break;
2609 errs() << "Invalid icmp predicate!" << I;
2611 llvm_unreachable(0);
2614 writeOperandWithCast(I.getOperand(1), I);
2615 if (NeedsClosingParens)
2623 void CWriter::visitFCmpInst(FCmpInst &I) {
2624 if (I.getPredicate() == FCmpInst::FCMP_FALSE) {
2628 if (I.getPredicate() == FCmpInst::FCMP_TRUE) {
2634 switch (I.getPredicate()) {
2635 default: llvm_unreachable("Illegal FCmp predicate");
2636 case FCmpInst::FCMP_ORD: op = "ord"; break;
2637 case FCmpInst::FCMP_UNO: op = "uno"; break;
2638 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
2639 case FCmpInst::FCMP_UNE: op = "une"; break;
2640 case FCmpInst::FCMP_ULT: op = "ult"; break;
2641 case FCmpInst::FCMP_ULE: op = "ule"; break;
2642 case FCmpInst::FCMP_UGT: op = "ugt"; break;
2643 case FCmpInst::FCMP_UGE: op = "uge"; break;
2644 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
2645 case FCmpInst::FCMP_ONE: op = "one"; break;
2646 case FCmpInst::FCMP_OLT: op = "olt"; break;
2647 case FCmpInst::FCMP_OLE: op = "ole"; break;
2648 case FCmpInst::FCMP_OGT: op = "ogt"; break;
2649 case FCmpInst::FCMP_OGE: op = "oge"; break;
2652 Out << "llvm_fcmp_" << op << "(";
2653 // Write the first operand
2654 writeOperand(I.getOperand(0));
2656 // Write the second operand
2657 writeOperand(I.getOperand(1));
2661 static const char * getFloatBitCastField(const Type *Ty) {
2662 switch (Ty->getTypeID()) {
2663 default: llvm_unreachable("Invalid Type");
2664 case Type::FloatTyID: return "Float";
2665 case Type::DoubleTyID: return "Double";
2666 case Type::IntegerTyID: {
2667 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
2676 void CWriter::visitCastInst(CastInst &I) {
2677 const Type *DstTy = I.getType();
2678 const Type *SrcTy = I.getOperand(0)->getType();
2679 if (isFPIntBitCast(I)) {
2681 // These int<->float and long<->double casts need to be handled specially
2682 Out << GetValueName(&I) << "__BITCAST_TEMPORARY."
2683 << getFloatBitCastField(I.getOperand(0)->getType()) << " = ";
2684 writeOperand(I.getOperand(0));
2685 Out << ", " << GetValueName(&I) << "__BITCAST_TEMPORARY."
2686 << getFloatBitCastField(I.getType());
2692 printCast(I.getOpcode(), SrcTy, DstTy);
2694 // Make a sext from i1 work by subtracting the i1 from 0 (an int).
2695 if (SrcTy == Type::getInt1Ty(I.getContext()) &&
2696 I.getOpcode() == Instruction::SExt)
2699 writeOperand(I.getOperand(0));
2701 if (DstTy == Type::getInt1Ty(I.getContext()) &&
2702 (I.getOpcode() == Instruction::Trunc ||
2703 I.getOpcode() == Instruction::FPToUI ||
2704 I.getOpcode() == Instruction::FPToSI ||
2705 I.getOpcode() == Instruction::PtrToInt)) {
2706 // Make sure we really get a trunc to bool by anding the operand with 1
2712 void CWriter::visitSelectInst(SelectInst &I) {
2714 writeOperand(I.getCondition());
2716 writeOperand(I.getTrueValue());
2718 writeOperand(I.getFalseValue());
2722 // Returns the macro name or value of the max or min of an integer type
2723 // (as defined in limits.h).
2724 static void printLimitValue(const IntegerType &Ty, bool isSigned, bool isMax,
2727 const char* sprefix = "";
2729 unsigned NumBits = Ty.getBitWidth();
2733 } else if (NumBits <= 16) {
2735 } else if (NumBits <= 32) {
2737 } else if (NumBits <= 64) {
2740 llvm_unreachable("Bit widths > 64 not implemented yet");
2744 Out << sprefix << type << (isMax ? "_MAX" : "_MIN");
2746 Out << "U" << type << (isMax ? "_MAX" : "0");
2750 static bool isSupportedIntegerSize(const IntegerType &T) {
2751 return T.getBitWidth() == 8 || T.getBitWidth() == 16 ||
2752 T.getBitWidth() == 32 || T.getBitWidth() == 64;
2756 void CWriter::printIntrinsicDefinition(const Function &F, raw_ostream &Out) {
2757 const FunctionType *funT = F.getFunctionType();
2758 const Type *retT = F.getReturnType();
2759 const IntegerType *elemT = cast<IntegerType>(funT->getParamType(1));
2761 assert(isSupportedIntegerSize(*elemT) &&
2762 "CBackend does not support arbitrary size integers.");
2763 assert(cast<StructType>(retT)->getElementType(0) == elemT &&
2764 elemT == funT->getParamType(0) && funT->getNumParams() == 2);
2766 switch (F.getIntrinsicID()) {
2768 llvm_unreachable("Unsupported Intrinsic.");
2769 case Intrinsic::uadd_with_overflow:
2770 // static inline Rty uadd_ixx(unsigned ixx a, unsigned ixx b) {
2772 // r.field0 = a + b;
2773 // r.field1 = (r.field0 < a);
2776 Out << "static inline ";
2777 printType(Out, retT);
2778 Out << GetValueName(&F);
2780 printSimpleType(Out, elemT, false);
2782 printSimpleType(Out, elemT, false);
2784 printType(Out, retT);
2786 Out << " r.field0 = a + b;\n";
2787 Out << " r.field1 = (r.field0 < a);\n";
2788 Out << " return r;\n}\n";
2791 case Intrinsic::sadd_with_overflow:
2792 // static inline Rty sadd_ixx(ixx a, ixx b) {
2794 // r.field1 = (b > 0 && a > XX_MAX - b) ||
2795 // (b < 0 && a < XX_MIN - b);
2796 // r.field0 = r.field1 ? 0 : a + b;
2800 printType(Out, retT);
2801 Out << GetValueName(&F);
2803 printSimpleType(Out, elemT, true);
2805 printSimpleType(Out, elemT, true);
2807 printType(Out, retT);
2809 Out << " r.field1 = (b > 0 && a > ";
2810 printLimitValue(*elemT, true, true, Out);
2811 Out << " - b) || (b < 0 && a < ";
2812 printLimitValue(*elemT, true, false, Out);
2814 Out << " r.field0 = r.field1 ? 0 : a + b;\n";
2815 Out << " return r;\n}\n";
2820 void CWriter::lowerIntrinsics(Function &F) {
2821 // This is used to keep track of intrinsics that get generated to a lowered
2822 // function. We must generate the prototypes before the function body which
2823 // will only be expanded on first use (by the loop below).
2824 std::vector<Function*> prototypesToGen;
2826 // Examine all the instructions in this function to find the intrinsics that
2827 // need to be lowered.
2828 for (Function::iterator BB = F.begin(), EE = F.end(); BB != EE; ++BB)
2829 for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; )
2830 if (CallInst *CI = dyn_cast<CallInst>(I++))
2831 if (Function *F = CI->getCalledFunction())
2832 switch (F->getIntrinsicID()) {
2833 case Intrinsic::not_intrinsic:
2834 case Intrinsic::memory_barrier:
2835 case Intrinsic::vastart:
2836 case Intrinsic::vacopy:
2837 case Intrinsic::vaend:
2838 case Intrinsic::returnaddress:
2839 case Intrinsic::frameaddress:
2840 case Intrinsic::setjmp:
2841 case Intrinsic::longjmp:
2842 case Intrinsic::prefetch:
2843 case Intrinsic::powi:
2844 case Intrinsic::x86_sse_cmp_ss:
2845 case Intrinsic::x86_sse_cmp_ps:
2846 case Intrinsic::x86_sse2_cmp_sd:
2847 case Intrinsic::x86_sse2_cmp_pd:
2848 case Intrinsic::ppc_altivec_lvsl:
2849 case Intrinsic::uadd_with_overflow:
2850 case Intrinsic::sadd_with_overflow:
2851 // We directly implement these intrinsics
2854 // If this is an intrinsic that directly corresponds to a GCC
2855 // builtin, we handle it.
2856 const char *BuiltinName = "";
2857 #define GET_GCC_BUILTIN_NAME
2858 #include "llvm/Intrinsics.gen"
2859 #undef GET_GCC_BUILTIN_NAME
2860 // If we handle it, don't lower it.
2861 if (BuiltinName[0]) break;
2863 // All other intrinsic calls we must lower.
2864 Instruction *Before = 0;
2865 if (CI != &BB->front())
2866 Before = prior(BasicBlock::iterator(CI));
2868 IL->LowerIntrinsicCall(CI);
2869 if (Before) { // Move iterator to instruction after call
2874 // If the intrinsic got lowered to another call, and that call has
2875 // a definition then we need to make sure its prototype is emitted
2876 // before any calls to it.
2877 if (CallInst *Call = dyn_cast<CallInst>(I))
2878 if (Function *NewF = Call->getCalledFunction())
2879 if (!NewF->isDeclaration())
2880 prototypesToGen.push_back(NewF);
2885 // We may have collected some prototypes to emit in the loop above.
2886 // Emit them now, before the function that uses them is emitted. But,
2887 // be careful not to emit them twice.
2888 std::vector<Function*>::iterator I = prototypesToGen.begin();
2889 std::vector<Function*>::iterator E = prototypesToGen.end();
2890 for ( ; I != E; ++I) {
2891 if (intrinsicPrototypesAlreadyGenerated.insert(*I).second) {
2893 printFunctionSignature(*I, true);
2899 void CWriter::visitCallInst(CallInst &I) {
2900 if (isa<InlineAsm>(I.getCalledValue()))
2901 return visitInlineAsm(I);
2903 bool WroteCallee = false;
2905 // Handle intrinsic function calls first...
2906 if (Function *F = I.getCalledFunction())
2907 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
2908 if (visitBuiltinCall(I, ID, WroteCallee))
2911 Value *Callee = I.getCalledValue();
2913 const PointerType *PTy = cast<PointerType>(Callee->getType());
2914 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
2916 // If this is a call to a struct-return function, assign to the first
2917 // parameter instead of passing it to the call.
2918 const AttrListPtr &PAL = I.getAttributes();
2919 bool hasByVal = I.hasByValArgument();
2920 bool isStructRet = I.hasStructRetAttr();
2922 writeOperandDeref(I.getArgOperand(0));
2926 if (I.isTailCall()) Out << " /*tail*/ ";
2929 // If this is an indirect call to a struct return function, we need to cast
2930 // the pointer. Ditto for indirect calls with byval arguments.
2931 bool NeedsCast = (hasByVal || isStructRet) && !isa<Function>(Callee);
2933 // GCC is a real PITA. It does not permit codegening casts of functions to
2934 // function pointers if they are in a call (it generates a trap instruction
2935 // instead!). We work around this by inserting a cast to void* in between
2936 // the function and the function pointer cast. Unfortunately, we can't just
2937 // form the constant expression here, because the folder will immediately
2940 // Note finally, that this is completely unsafe. ANSI C does not guarantee
2941 // that void* and function pointers have the same size. :( To deal with this
2942 // in the common case, we handle casts where the number of arguments passed
2945 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Callee))
2947 if (Function *RF = dyn_cast<Function>(CE->getOperand(0))) {
2953 // Ok, just cast the pointer type.
2956 printStructReturnPointerFunctionType(Out, PAL,
2957 cast<PointerType>(I.getCalledValue()->getType()));
2959 printType(Out, I.getCalledValue()->getType(), false, "", true, PAL);
2961 printType(Out, I.getCalledValue()->getType());
2964 writeOperand(Callee);
2965 if (NeedsCast) Out << ')';
2970 bool PrintedArg = false;
2971 if(FTy->isVarArg() && !FTy->getNumParams()) {
2972 Out << "0 /*dummy arg*/";
2976 unsigned NumDeclaredParams = FTy->getNumParams();
2978 CallSite::arg_iterator AI = CS.arg_begin(), AE = CS.arg_end();
2980 if (isStructRet) { // Skip struct return argument.
2986 for (; AI != AE; ++AI, ++ArgNo) {
2987 if (PrintedArg) Out << ", ";
2988 if (ArgNo < NumDeclaredParams &&
2989 (*AI)->getType() != FTy->getParamType(ArgNo)) {
2991 printType(Out, FTy->getParamType(ArgNo),
2992 /*isSigned=*/PAL.paramHasAttr(ArgNo+1, Attribute::SExt));
2995 // Check if the argument is expected to be passed by value.
2996 if (I.paramHasAttr(ArgNo+1, Attribute::ByVal))
2997 writeOperandDeref(*AI);
3005 /// visitBuiltinCall - Handle the call to the specified builtin. Returns true
3006 /// if the entire call is handled, return false if it wasn't handled, and
3007 /// optionally set 'WroteCallee' if the callee has already been printed out.
3008 bool CWriter::visitBuiltinCall(CallInst &I, Intrinsic::ID ID,
3009 bool &WroteCallee) {
3012 // If this is an intrinsic that directly corresponds to a GCC
3013 // builtin, we emit it here.
3014 const char *BuiltinName = "";
3015 Function *F = I.getCalledFunction();
3016 #define GET_GCC_BUILTIN_NAME
3017 #include "llvm/Intrinsics.gen"
3018 #undef GET_GCC_BUILTIN_NAME
3019 assert(BuiltinName[0] && "Unknown LLVM intrinsic!");
3025 case Intrinsic::memory_barrier:
3026 Out << "__sync_synchronize()";
3028 case Intrinsic::vastart:
3031 Out << "va_start(*(va_list*)";
3032 writeOperand(I.getArgOperand(0));
3034 // Output the last argument to the enclosing function.
3035 if (I.getParent()->getParent()->arg_empty())
3036 Out << "vararg_dummy_arg";
3038 writeOperand(--I.getParent()->getParent()->arg_end());
3041 case Intrinsic::vaend:
3042 if (!isa<ConstantPointerNull>(I.getArgOperand(0))) {
3043 Out << "0; va_end(*(va_list*)";
3044 writeOperand(I.getArgOperand(0));
3047 Out << "va_end(*(va_list*)0)";
3050 case Intrinsic::vacopy:
3052 Out << "va_copy(*(va_list*)";
3053 writeOperand(I.getArgOperand(0));
3054 Out << ", *(va_list*)";
3055 writeOperand(I.getArgOperand(1));
3058 case Intrinsic::returnaddress:
3059 Out << "__builtin_return_address(";
3060 writeOperand(I.getArgOperand(0));
3063 case Intrinsic::frameaddress:
3064 Out << "__builtin_frame_address(";
3065 writeOperand(I.getArgOperand(0));
3068 case Intrinsic::powi:
3069 Out << "__builtin_powi(";
3070 writeOperand(I.getArgOperand(0));
3072 writeOperand(I.getArgOperand(1));
3075 case Intrinsic::setjmp:
3076 Out << "setjmp(*(jmp_buf*)";
3077 writeOperand(I.getArgOperand(0));
3080 case Intrinsic::longjmp:
3081 Out << "longjmp(*(jmp_buf*)";
3082 writeOperand(I.getArgOperand(0));
3084 writeOperand(I.getArgOperand(1));
3087 case Intrinsic::prefetch:
3088 Out << "LLVM_PREFETCH((const void *)";
3089 writeOperand(I.getArgOperand(0));
3091 writeOperand(I.getArgOperand(1));
3093 writeOperand(I.getArgOperand(2));
3096 case Intrinsic::stacksave:
3097 // Emit this as: Val = 0; *((void**)&Val) = __builtin_stack_save()
3098 // to work around GCC bugs (see PR1809).
3099 Out << "0; *((void**)&" << GetValueName(&I)
3100 << ") = __builtin_stack_save()";
3102 case Intrinsic::x86_sse_cmp_ss:
3103 case Intrinsic::x86_sse_cmp_ps:
3104 case Intrinsic::x86_sse2_cmp_sd:
3105 case Intrinsic::x86_sse2_cmp_pd:
3107 printType(Out, I.getType());
3109 // Multiple GCC builtins multiplex onto this intrinsic.
3110 switch (cast<ConstantInt>(I.getArgOperand(2))->getZExtValue()) {
3111 default: llvm_unreachable("Invalid llvm.x86.sse.cmp!");
3112 case 0: Out << "__builtin_ia32_cmpeq"; break;
3113 case 1: Out << "__builtin_ia32_cmplt"; break;
3114 case 2: Out << "__builtin_ia32_cmple"; break;
3115 case 3: Out << "__builtin_ia32_cmpunord"; break;
3116 case 4: Out << "__builtin_ia32_cmpneq"; break;
3117 case 5: Out << "__builtin_ia32_cmpnlt"; break;
3118 case 6: Out << "__builtin_ia32_cmpnle"; break;
3119 case 7: Out << "__builtin_ia32_cmpord"; break;
3121 if (ID == Intrinsic::x86_sse_cmp_ps || ID == Intrinsic::x86_sse2_cmp_pd)
3125 if (ID == Intrinsic::x86_sse_cmp_ss || ID == Intrinsic::x86_sse_cmp_ps)
3131 writeOperand(I.getArgOperand(0));
3133 writeOperand(I.getArgOperand(1));
3136 case Intrinsic::ppc_altivec_lvsl:
3138 printType(Out, I.getType());
3140 Out << "__builtin_altivec_lvsl(0, (void*)";
3141 writeOperand(I.getArgOperand(0));
3144 case Intrinsic::uadd_with_overflow:
3145 case Intrinsic::sadd_with_overflow:
3146 Out << GetValueName(I.getCalledFunction()) << "(";
3147 writeOperand(I.getArgOperand(0));
3149 writeOperand(I.getArgOperand(1));
3155 //This converts the llvm constraint string to something gcc is expecting.
3156 //TODO: work out platform independent constraints and factor those out
3157 // of the per target tables
3158 // handle multiple constraint codes
3159 std::string CWriter::InterpretASMConstraint(InlineAsm::ConstraintInfo& c) {
3160 assert(c.Codes.size() == 1 && "Too many asm constraint codes to handle");
3162 // Grab the translation table from MCAsmInfo if it exists.
3163 const MCAsmInfo *TargetAsm;
3164 std::string Triple = TheModule->getTargetTriple();
3166 Triple = llvm::sys::getHostTriple();
3169 if (const Target *Match = TargetRegistry::lookupTarget(Triple, E))
3170 TargetAsm = Match->createAsmInfo(Triple);
3174 const char *const *table = TargetAsm->getAsmCBE();
3176 // Search the translation table if it exists.
3177 for (int i = 0; table && table[i]; i += 2)
3178 if (c.Codes[0] == table[i]) {
3183 // Default is identity.
3188 //TODO: import logic from AsmPrinter.cpp
3189 static std::string gccifyAsm(std::string asmstr) {
3190 for (std::string::size_type i = 0; i != asmstr.size(); ++i)
3191 if (asmstr[i] == '\n')
3192 asmstr.replace(i, 1, "\\n");
3193 else if (asmstr[i] == '\t')
3194 asmstr.replace(i, 1, "\\t");
3195 else if (asmstr[i] == '$') {
3196 if (asmstr[i + 1] == '{') {
3197 std::string::size_type a = asmstr.find_first_of(':', i + 1);
3198 std::string::size_type b = asmstr.find_first_of('}', i + 1);
3199 std::string n = "%" +
3200 asmstr.substr(a + 1, b - a - 1) +
3201 asmstr.substr(i + 2, a - i - 2);
3202 asmstr.replace(i, b - i + 1, n);
3205 asmstr.replace(i, 1, "%");
3207 else if (asmstr[i] == '%')//grr
3208 { asmstr.replace(i, 1, "%%"); ++i;}
3213 //TODO: assumptions about what consume arguments from the call are likely wrong
3214 // handle communitivity
3215 void CWriter::visitInlineAsm(CallInst &CI) {
3216 InlineAsm* as = cast<InlineAsm>(CI.getCalledValue());
3217 InlineAsm::ConstraintInfoVector Constraints = as->ParseConstraints();
3219 std::vector<std::pair<Value*, int> > ResultVals;
3220 if (CI.getType() == Type::getVoidTy(CI.getContext()))
3222 else if (const StructType *ST = dyn_cast<StructType>(CI.getType())) {
3223 for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i)
3224 ResultVals.push_back(std::make_pair(&CI, (int)i));
3226 ResultVals.push_back(std::make_pair(&CI, -1));
3229 // Fix up the asm string for gcc and emit it.
3230 Out << "__asm__ volatile (\"" << gccifyAsm(as->getAsmString()) << "\"\n";
3233 unsigned ValueCount = 0;
3234 bool IsFirst = true;
3236 // Convert over all the output constraints.
3237 for (InlineAsm::ConstraintInfoVector::iterator I = Constraints.begin(),
3238 E = Constraints.end(); I != E; ++I) {
3240 if (I->Type != InlineAsm::isOutput) {
3242 continue; // Ignore non-output constraints.
3245 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3246 std::string C = InterpretASMConstraint(*I);
3247 if (C.empty()) continue;
3258 if (ValueCount < ResultVals.size()) {
3259 DestVal = ResultVals[ValueCount].first;
3260 DestValNo = ResultVals[ValueCount].second;
3262 DestVal = CI.getArgOperand(ValueCount-ResultVals.size());
3264 if (I->isEarlyClobber)
3267 Out << "\"=" << C << "\"(" << GetValueName(DestVal);
3268 if (DestValNo != -1)
3269 Out << ".field" << DestValNo; // Multiple retvals.
3275 // Convert over all the input constraints.
3279 for (InlineAsm::ConstraintInfoVector::iterator I = Constraints.begin(),
3280 E = Constraints.end(); I != E; ++I) {
3281 if (I->Type != InlineAsm::isInput) {
3283 continue; // Ignore non-input constraints.
3286 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3287 std::string C = InterpretASMConstraint(*I);
3288 if (C.empty()) continue;
3295 assert(ValueCount >= ResultVals.size() && "Input can't refer to result");
3296 Value *SrcVal = CI.getArgOperand(ValueCount-ResultVals.size());
3298 Out << "\"" << C << "\"(";
3300 writeOperand(SrcVal);
3302 writeOperandDeref(SrcVal);
3306 // Convert over the clobber constraints.
3308 for (InlineAsm::ConstraintInfoVector::iterator I = Constraints.begin(),
3309 E = Constraints.end(); I != E; ++I) {
3310 if (I->Type != InlineAsm::isClobber)
3311 continue; // Ignore non-input constraints.
3313 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3314 std::string C = InterpretASMConstraint(*I);
3315 if (C.empty()) continue;
3322 Out << '\"' << C << '"';
3328 void CWriter::visitAllocaInst(AllocaInst &I) {
3330 printType(Out, I.getType());
3331 Out << ") alloca(sizeof(";
3332 printType(Out, I.getType()->getElementType());
3334 if (I.isArrayAllocation()) {
3336 writeOperand(I.getOperand(0));
3341 void CWriter::printGEPExpression(Value *Ptr, gep_type_iterator I,
3342 gep_type_iterator E, bool Static) {
3344 // If there are no indices, just print out the pointer.
3350 // Find out if the last index is into a vector. If so, we have to print this
3351 // specially. Since vectors can't have elements of indexable type, only the
3352 // last index could possibly be of a vector element.
3353 const VectorType *LastIndexIsVector = 0;
3355 for (gep_type_iterator TmpI = I; TmpI != E; ++TmpI)
3356 LastIndexIsVector = dyn_cast<VectorType>(*TmpI);
3361 // If the last index is into a vector, we can't print it as &a[i][j] because
3362 // we can't index into a vector with j in GCC. Instead, emit this as
3363 // (((float*)&a[i])+j)
3364 if (LastIndexIsVector) {
3366 printType(Out, PointerType::getUnqual(LastIndexIsVector->getElementType()));
3372 // If the first index is 0 (very typical) we can do a number of
3373 // simplifications to clean up the code.
3374 Value *FirstOp = I.getOperand();
3375 if (!isa<Constant>(FirstOp) || !cast<Constant>(FirstOp)->isNullValue()) {
3376 // First index isn't simple, print it the hard way.
3379 ++I; // Skip the zero index.
3381 // Okay, emit the first operand. If Ptr is something that is already address
3382 // exposed, like a global, avoid emitting (&foo)[0], just emit foo instead.
3383 if (isAddressExposed(Ptr)) {
3384 writeOperandInternal(Ptr, Static);
3385 } else if (I != E && (*I)->isStructTy()) {
3386 // If we didn't already emit the first operand, see if we can print it as
3387 // P->f instead of "P[0].f"
3389 Out << "->field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3390 ++I; // eat the struct index as well.
3392 // Instead of emitting P[0][1], emit (*P)[1], which is more idiomatic.
3399 for (; I != E; ++I) {
3400 if ((*I)->isStructTy()) {
3401 Out << ".field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3402 } else if ((*I)->isArrayTy()) {
3404 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3406 } else if (!(*I)->isVectorTy()) {
3408 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3411 // If the last index is into a vector, then print it out as "+j)". This
3412 // works with the 'LastIndexIsVector' code above.
3413 if (isa<Constant>(I.getOperand()) &&
3414 cast<Constant>(I.getOperand())->isNullValue()) {
3415 Out << "))"; // avoid "+0".
3418 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3426 void CWriter::writeMemoryAccess(Value *Operand, const Type *OperandType,
3427 bool IsVolatile, unsigned Alignment) {
3429 bool IsUnaligned = Alignment &&
3430 Alignment < TD->getABITypeAlignment(OperandType);
3434 if (IsVolatile || IsUnaligned) {
3437 Out << "struct __attribute__ ((packed, aligned(" << Alignment << "))) {";
3438 printType(Out, OperandType, false, IsUnaligned ? "data" : "volatile*");
3441 if (IsVolatile) Out << "volatile ";
3447 writeOperand(Operand);
3449 if (IsVolatile || IsUnaligned) {
3456 void CWriter::visitLoadInst(LoadInst &I) {
3457 writeMemoryAccess(I.getOperand(0), I.getType(), I.isVolatile(),
3462 void CWriter::visitStoreInst(StoreInst &I) {
3463 writeMemoryAccess(I.getPointerOperand(), I.getOperand(0)->getType(),
3464 I.isVolatile(), I.getAlignment());
3466 Value *Operand = I.getOperand(0);
3467 Constant *BitMask = 0;
3468 if (const IntegerType* ITy = dyn_cast<IntegerType>(Operand->getType()))
3469 if (!ITy->isPowerOf2ByteWidth())
3470 // We have a bit width that doesn't match an even power-of-2 byte
3471 // size. Consequently we must & the value with the type's bit mask
3472 BitMask = ConstantInt::get(ITy, ITy->getBitMask());
3475 writeOperand(Operand);
3478 printConstant(BitMask, false);
3483 void CWriter::visitGetElementPtrInst(GetElementPtrInst &I) {
3484 printGEPExpression(I.getPointerOperand(), gep_type_begin(I),
3485 gep_type_end(I), false);
3488 void CWriter::visitVAArgInst(VAArgInst &I) {
3489 Out << "va_arg(*(va_list*)";
3490 writeOperand(I.getOperand(0));
3492 printType(Out, I.getType());
3496 void CWriter::visitInsertElementInst(InsertElementInst &I) {
3497 const Type *EltTy = I.getType()->getElementType();
3498 writeOperand(I.getOperand(0));
3501 printType(Out, PointerType::getUnqual(EltTy));
3502 Out << ")(&" << GetValueName(&I) << "))[";
3503 writeOperand(I.getOperand(2));
3505 writeOperand(I.getOperand(1));
3509 void CWriter::visitExtractElementInst(ExtractElementInst &I) {
3510 // We know that our operand is not inlined.
3513 cast<VectorType>(I.getOperand(0)->getType())->getElementType();
3514 printType(Out, PointerType::getUnqual(EltTy));
3515 Out << ")(&" << GetValueName(I.getOperand(0)) << "))[";
3516 writeOperand(I.getOperand(1));
3520 void CWriter::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
3522 printType(Out, SVI.getType());
3524 const VectorType *VT = SVI.getType();
3525 unsigned NumElts = VT->getNumElements();
3526 const Type *EltTy = VT->getElementType();
3528 for (unsigned i = 0; i != NumElts; ++i) {
3530 int SrcVal = SVI.getMaskValue(i);
3531 if ((unsigned)SrcVal >= NumElts*2) {
3532 Out << " 0/*undef*/ ";
3534 Value *Op = SVI.getOperand((unsigned)SrcVal >= NumElts);
3535 if (isa<Instruction>(Op)) {
3536 // Do an extractelement of this value from the appropriate input.
3538 printType(Out, PointerType::getUnqual(EltTy));
3539 Out << ")(&" << GetValueName(Op)
3540 << "))[" << (SrcVal & (NumElts-1)) << "]";
3541 } else if (isa<ConstantAggregateZero>(Op) || isa<UndefValue>(Op)) {
3544 printConstant(cast<ConstantVector>(Op)->getOperand(SrcVal &
3553 void CWriter::visitInsertValueInst(InsertValueInst &IVI) {
3554 // Start by copying the entire aggregate value into the result variable.
3555 writeOperand(IVI.getOperand(0));
3558 // Then do the insert to update the field.
3559 Out << GetValueName(&IVI);
3560 for (const unsigned *b = IVI.idx_begin(), *i = b, *e = IVI.idx_end();
3562 const Type *IndexedTy =
3563 ExtractValueInst::getIndexedType(IVI.getOperand(0)->getType(),
3564 ArrayRef<unsigned>(b, i+1));
3565 if (IndexedTy->isArrayTy())
3566 Out << ".array[" << *i << "]";
3568 Out << ".field" << *i;
3571 writeOperand(IVI.getOperand(1));
3574 void CWriter::visitExtractValueInst(ExtractValueInst &EVI) {
3576 if (isa<UndefValue>(EVI.getOperand(0))) {
3578 printType(Out, EVI.getType());
3579 Out << ") 0/*UNDEF*/";
3581 Out << GetValueName(EVI.getOperand(0));
3582 for (const unsigned *b = EVI.idx_begin(), *i = b, *e = EVI.idx_end();
3584 const Type *IndexedTy =
3585 ExtractValueInst::getIndexedType(EVI.getOperand(0)->getType(),
3586 ArrayRef<unsigned>(b, i+1));
3587 if (IndexedTy->isArrayTy())
3588 Out << ".array[" << *i << "]";
3590 Out << ".field" << *i;
3596 //===----------------------------------------------------------------------===//
3597 // External Interface declaration
3598 //===----------------------------------------------------------------------===//
3600 bool CTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
3601 formatted_raw_ostream &o,
3602 CodeGenFileType FileType,
3603 CodeGenOpt::Level OptLevel,
3604 bool DisableVerify) {
3605 if (FileType != TargetMachine::CGFT_AssemblyFile) return true;
3607 PM.add(createGCLoweringPass());
3608 PM.add(createLowerInvokePass());
3609 PM.add(createCFGSimplificationPass()); // clean up after lower invoke.
3610 PM.add(new CWriter(o));
3611 PM.add(createGCInfoDeleter());