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/MCObjectFileInfo.h"
41 #include "llvm/MC/MCRegisterInfo.h"
42 #include "llvm/MC/MCSubtargetInfo.h"
43 #include "llvm/MC/MCSymbol.h"
44 #include "llvm/Target/TargetData.h"
45 #include "llvm/Target/TargetRegistry.h"
46 #include "llvm/Support/CallSite.h"
47 #include "llvm/Support/CFG.h"
48 #include "llvm/Support/ErrorHandling.h"
49 #include "llvm/Support/FormattedStream.h"
50 #include "llvm/Support/GetElementPtrTypeIterator.h"
51 #include "llvm/Support/InstVisitor.h"
52 #include "llvm/Support/MathExtras.h"
53 #include "llvm/Support/Host.h"
54 #include "llvm/Config/config.h"
56 // Some ms header decided to define setjmp as _setjmp, undo this for this file.
62 extern "C" void LLVMInitializeCBackendTarget() {
63 // Register the target.
64 RegisterTargetMachine<CTargetMachine> X(TheCBackendTarget);
67 extern "C" void LLVMInitializeCBackendMCAsmInfo() {}
69 extern "C" void LLVMInitializeCBackendMCRegisterInfo() {}
71 extern "C" void LLVMInitializeCBackendMCInstrInfo() {}
73 extern "C" void LLVMInitializeCBackendMCSubtargetInfo() {}
75 extern "C" void LLVMInitializeCBackendMCCodeGenInfo() {}
78 class CBEMCAsmInfo : public MCAsmInfo {
82 PrivateGlobalPrefix = "";
86 /// CWriter - This class is the main chunk of code that converts an LLVM
87 /// module to a C translation unit.
88 class CWriter : public FunctionPass, public InstVisitor<CWriter> {
89 formatted_raw_ostream &Out;
90 IntrinsicLowering *IL;
93 const Module *TheModule;
94 const MCAsmInfo* TAsm;
95 const MCRegisterInfo *MRI;
96 const MCObjectFileInfo *MOFI;
100 std::map<const ConstantFP *, unsigned> FPConstantMap;
101 std::set<Function*> intrinsicPrototypesAlreadyGenerated;
102 std::set<const Argument*> ByValParams;
104 unsigned OpaqueCounter;
105 DenseMap<const Value*, unsigned> AnonValueNumbers;
106 unsigned NextAnonValueNumber;
108 /// UnnamedStructIDs - This contains a unique ID for each struct that is
109 /// either anonymous or has no name.
110 DenseMap<StructType*, unsigned> UnnamedStructIDs;
114 explicit CWriter(formatted_raw_ostream &o)
115 : FunctionPass(ID), Out(o), IL(0), Mang(0), LI(0),
116 TheModule(0), TAsm(0), MRI(0), MOFI(0), TCtx(0), TD(0),
117 OpaqueCounter(0), NextAnonValueNumber(0) {
118 initializeLoopInfoPass(*PassRegistry::getPassRegistry());
122 virtual const char *getPassName() const { return "C backend"; }
124 void getAnalysisUsage(AnalysisUsage &AU) const {
125 AU.addRequired<LoopInfo>();
126 AU.setPreservesAll();
129 virtual bool doInitialization(Module &M);
131 bool runOnFunction(Function &F) {
132 // Do not codegen any 'available_externally' functions at all, they have
133 // definitions outside the translation unit.
134 if (F.hasAvailableExternallyLinkage())
137 LI = &getAnalysis<LoopInfo>();
139 // Get rid of intrinsics we can't handle.
142 // Output all floating point constants that cannot be printed accurately.
143 printFloatingPointConstants(F);
149 virtual bool doFinalization(Module &M) {
158 FPConstantMap.clear();
160 intrinsicPrototypesAlreadyGenerated.clear();
161 UnnamedStructIDs.clear();
165 raw_ostream &printType(raw_ostream &Out, Type *Ty,
166 bool isSigned = false,
167 const std::string &VariableName = "",
168 bool IgnoreName = false,
169 const AttrListPtr &PAL = AttrListPtr());
170 raw_ostream &printSimpleType(raw_ostream &Out, Type *Ty,
172 const std::string &NameSoFar = "");
174 void printStructReturnPointerFunctionType(raw_ostream &Out,
175 const AttrListPtr &PAL,
178 std::string getStructName(StructType *ST);
180 /// writeOperandDeref - Print the result of dereferencing the specified
181 /// operand with '*'. This is equivalent to printing '*' then using
182 /// writeOperand, but avoids excess syntax in some cases.
183 void writeOperandDeref(Value *Operand) {
184 if (isAddressExposed(Operand)) {
185 // Already something with an address exposed.
186 writeOperandInternal(Operand);
189 writeOperand(Operand);
194 void writeOperand(Value *Operand, bool Static = false);
195 void writeInstComputationInline(Instruction &I);
196 void writeOperandInternal(Value *Operand, bool Static = false);
197 void writeOperandWithCast(Value* Operand, unsigned Opcode);
198 void writeOperandWithCast(Value* Operand, const ICmpInst &I);
199 bool writeInstructionCast(const Instruction &I);
201 void writeMemoryAccess(Value *Operand, Type *OperandType,
202 bool IsVolatile, unsigned Alignment);
205 std::string InterpretASMConstraint(InlineAsm::ConstraintInfo& c);
207 void lowerIntrinsics(Function &F);
208 /// Prints the definition of the intrinsic function F. Supports the
209 /// intrinsics which need to be explicitly defined in the CBackend.
210 void printIntrinsicDefinition(const Function &F, raw_ostream &Out);
212 void printModuleTypes();
213 void printContainedStructs(Type *Ty, SmallPtrSet<Type *, 16> &);
214 void printFloatingPointConstants(Function &F);
215 void printFloatingPointConstants(const Constant *C);
216 void printFunctionSignature(const Function *F, bool Prototype);
218 void printFunction(Function &);
219 void printBasicBlock(BasicBlock *BB);
220 void printLoop(Loop *L);
222 void printCast(unsigned opcode, Type *SrcTy, Type *DstTy);
223 void printConstant(Constant *CPV, bool Static);
224 void printConstantWithCast(Constant *CPV, unsigned Opcode);
225 bool printConstExprCast(const ConstantExpr *CE, bool Static);
226 void printConstantArray(ConstantArray *CPA, bool Static);
227 void printConstantVector(ConstantVector *CV, bool Static);
229 /// isAddressExposed - Return true if the specified value's name needs to
230 /// have its address taken in order to get a C value of the correct type.
231 /// This happens for global variables, byval parameters, and direct allocas.
232 bool isAddressExposed(const Value *V) const {
233 if (const Argument *A = dyn_cast<Argument>(V))
234 return ByValParams.count(A);
235 return isa<GlobalVariable>(V) || isDirectAlloca(V);
238 // isInlinableInst - Attempt to inline instructions into their uses to build
239 // trees as much as possible. To do this, we have to consistently decide
240 // what is acceptable to inline, so that variable declarations don't get
241 // printed and an extra copy of the expr is not emitted.
243 static bool isInlinableInst(const Instruction &I) {
244 // Always inline cmp instructions, even if they are shared by multiple
245 // expressions. GCC generates horrible code if we don't.
249 // Must be an expression, must be used exactly once. If it is dead, we
250 // emit it inline where it would go.
251 if (I.getType() == Type::getVoidTy(I.getContext()) || !I.hasOneUse() ||
252 isa<TerminatorInst>(I) || isa<CallInst>(I) || isa<PHINode>(I) ||
253 isa<LoadInst>(I) || isa<VAArgInst>(I) || isa<InsertElementInst>(I) ||
254 isa<InsertValueInst>(I))
255 // Don't inline a load across a store or other bad things!
258 // Must not be used in inline asm, extractelement, or shufflevector.
260 const Instruction &User = cast<Instruction>(*I.use_back());
261 if (isInlineAsm(User) || isa<ExtractElementInst>(User) ||
262 isa<ShuffleVectorInst>(User))
266 // Only inline instruction it if it's use is in the same BB as the inst.
267 return I.getParent() == cast<Instruction>(I.use_back())->getParent();
270 // isDirectAlloca - Define fixed sized allocas in the entry block as direct
271 // variables which are accessed with the & operator. This causes GCC to
272 // generate significantly better code than to emit alloca calls directly.
274 static const AllocaInst *isDirectAlloca(const Value *V) {
275 const AllocaInst *AI = dyn_cast<AllocaInst>(V);
277 if (AI->isArrayAllocation())
278 return 0; // FIXME: we can also inline fixed size array allocas!
279 if (AI->getParent() != &AI->getParent()->getParent()->getEntryBlock())
284 // isInlineAsm - Check if the instruction is a call to an inline asm chunk.
285 static bool isInlineAsm(const Instruction& I) {
286 if (const CallInst *CI = dyn_cast<CallInst>(&I))
287 return isa<InlineAsm>(CI->getCalledValue());
291 // Instruction visitation functions
292 friend class InstVisitor<CWriter>;
294 void visitReturnInst(ReturnInst &I);
295 void visitBranchInst(BranchInst &I);
296 void visitSwitchInst(SwitchInst &I);
297 void visitIndirectBrInst(IndirectBrInst &I);
298 void visitInvokeInst(InvokeInst &I) {
299 llvm_unreachable("Lowerinvoke pass didn't work!");
302 void visitUnwindInst(UnwindInst &I) {
303 llvm_unreachable("Lowerinvoke pass didn't work!");
305 void visitUnreachableInst(UnreachableInst &I);
307 void visitPHINode(PHINode &I);
308 void visitBinaryOperator(Instruction &I);
309 void visitICmpInst(ICmpInst &I);
310 void visitFCmpInst(FCmpInst &I);
312 void visitCastInst (CastInst &I);
313 void visitSelectInst(SelectInst &I);
314 void visitCallInst (CallInst &I);
315 void visitInlineAsm(CallInst &I);
316 bool visitBuiltinCall(CallInst &I, Intrinsic::ID ID, bool &WroteCallee);
318 void visitAllocaInst(AllocaInst &I);
319 void visitLoadInst (LoadInst &I);
320 void visitStoreInst (StoreInst &I);
321 void visitGetElementPtrInst(GetElementPtrInst &I);
322 void visitVAArgInst (VAArgInst &I);
324 void visitInsertElementInst(InsertElementInst &I);
325 void visitExtractElementInst(ExtractElementInst &I);
326 void visitShuffleVectorInst(ShuffleVectorInst &SVI);
328 void visitInsertValueInst(InsertValueInst &I);
329 void visitExtractValueInst(ExtractValueInst &I);
331 void visitInstruction(Instruction &I) {
333 errs() << "C Writer does not know about " << I;
338 void outputLValue(Instruction *I) {
339 Out << " " << GetValueName(I) << " = ";
342 bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To);
343 void printPHICopiesForSuccessor(BasicBlock *CurBlock,
344 BasicBlock *Successor, unsigned Indent);
345 void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
347 void printGEPExpression(Value *Ptr, gep_type_iterator I,
348 gep_type_iterator E, bool Static);
350 std::string GetValueName(const Value *Operand);
354 char CWriter::ID = 0;
358 static std::string CBEMangle(const std::string &S) {
361 for (unsigned i = 0, e = S.size(); i != e; ++i)
362 if (isalnum(S[i]) || S[i] == '_') {
366 Result += 'A'+(S[i]&15);
367 Result += 'A'+((S[i]>>4)&15);
373 std::string CWriter::getStructName(StructType *ST) {
374 if (!ST->isAnonymous() && !ST->getName().empty())
375 return CBEMangle("l_"+ST->getName().str());
377 return "l_unnamed_" + utostr(UnnamedStructIDs[ST]);
381 /// printStructReturnPointerFunctionType - This is like printType for a struct
382 /// return type, except, instead of printing the type as void (*)(Struct*, ...)
383 /// print it as "Struct (*)(...)", for struct return functions.
384 void CWriter::printStructReturnPointerFunctionType(raw_ostream &Out,
385 const AttrListPtr &PAL,
386 PointerType *TheTy) {
387 FunctionType *FTy = cast<FunctionType>(TheTy->getElementType());
389 raw_string_ostream FunctionInnards(tstr);
390 FunctionInnards << " (*) (";
391 bool PrintedType = false;
393 FunctionType::param_iterator I = FTy->param_begin(), E = FTy->param_end();
394 Type *RetTy = cast<PointerType>(*I)->getElementType();
396 for (++I, ++Idx; I != E; ++I, ++Idx) {
398 FunctionInnards << ", ";
400 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
401 assert(ArgTy->isPointerTy());
402 ArgTy = cast<PointerType>(ArgTy)->getElementType();
404 printType(FunctionInnards, ArgTy,
405 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
408 if (FTy->isVarArg()) {
410 FunctionInnards << " int"; //dummy argument for empty vararg functs
411 FunctionInnards << ", ...";
412 } else if (!PrintedType) {
413 FunctionInnards << "void";
415 FunctionInnards << ')';
416 printType(Out, RetTy,
417 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), FunctionInnards.str());
421 CWriter::printSimpleType(raw_ostream &Out, Type *Ty, bool isSigned,
422 const std::string &NameSoFar) {
423 assert((Ty->isPrimitiveType() || Ty->isIntegerTy() || Ty->isVectorTy()) &&
424 "Invalid type for printSimpleType");
425 switch (Ty->getTypeID()) {
426 case Type::VoidTyID: return Out << "void " << NameSoFar;
427 case Type::IntegerTyID: {
428 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
430 return Out << "bool " << NameSoFar;
431 else if (NumBits <= 8)
432 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
433 else if (NumBits <= 16)
434 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
435 else if (NumBits <= 32)
436 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
437 else if (NumBits <= 64)
438 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
440 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
441 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
444 case Type::FloatTyID: return Out << "float " << NameSoFar;
445 case Type::DoubleTyID: return Out << "double " << NameSoFar;
446 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
447 // present matches host 'long double'.
448 case Type::X86_FP80TyID:
449 case Type::PPC_FP128TyID:
450 case Type::FP128TyID: return Out << "long double " << NameSoFar;
452 case Type::X86_MMXTyID:
453 return printSimpleType(Out, Type::getInt32Ty(Ty->getContext()), isSigned,
454 " __attribute__((vector_size(64))) " + NameSoFar);
456 case Type::VectorTyID: {
457 VectorType *VTy = cast<VectorType>(Ty);
458 return printSimpleType(Out, VTy->getElementType(), isSigned,
459 " __attribute__((vector_size(" +
460 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
465 errs() << "Unknown primitive type: " << *Ty << "\n";
471 // Pass the Type* and the variable name and this prints out the variable
474 raw_ostream &CWriter::printType(raw_ostream &Out, Type *Ty,
475 bool isSigned, const std::string &NameSoFar,
476 bool IgnoreName, const AttrListPtr &PAL) {
477 if (Ty->isPrimitiveType() || Ty->isIntegerTy() || Ty->isVectorTy()) {
478 printSimpleType(Out, Ty, isSigned, NameSoFar);
482 switch (Ty->getTypeID()) {
483 case Type::FunctionTyID: {
484 FunctionType *FTy = cast<FunctionType>(Ty);
486 raw_string_ostream FunctionInnards(tstr);
487 FunctionInnards << " (" << NameSoFar << ") (";
489 for (FunctionType::param_iterator I = FTy->param_begin(),
490 E = FTy->param_end(); I != E; ++I) {
492 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
493 assert(ArgTy->isPointerTy());
494 ArgTy = cast<PointerType>(ArgTy)->getElementType();
496 if (I != FTy->param_begin())
497 FunctionInnards << ", ";
498 printType(FunctionInnards, ArgTy,
499 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
502 if (FTy->isVarArg()) {
503 if (!FTy->getNumParams())
504 FunctionInnards << " int"; //dummy argument for empty vaarg functs
505 FunctionInnards << ", ...";
506 } else if (!FTy->getNumParams()) {
507 FunctionInnards << "void";
509 FunctionInnards << ')';
510 printType(Out, FTy->getReturnType(),
511 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), FunctionInnards.str());
514 case Type::StructTyID: {
515 StructType *STy = cast<StructType>(Ty);
517 // Check to see if the type is named.
519 return Out << getStructName(STy) << ' ' << NameSoFar;
521 Out << NameSoFar + " {\n";
523 for (StructType::element_iterator I = STy->element_begin(),
524 E = STy->element_end(); I != E; ++I) {
526 printType(Out, *I, false, "field" + utostr(Idx++));
531 Out << " __attribute__ ((packed))";
535 case Type::PointerTyID: {
536 PointerType *PTy = cast<PointerType>(Ty);
537 std::string ptrName = "*" + NameSoFar;
539 if (PTy->getElementType()->isArrayTy() ||
540 PTy->getElementType()->isVectorTy())
541 ptrName = "(" + ptrName + ")";
544 // Must be a function ptr cast!
545 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
546 return printType(Out, PTy->getElementType(), false, ptrName);
549 case Type::ArrayTyID: {
550 ArrayType *ATy = cast<ArrayType>(Ty);
551 unsigned NumElements = ATy->getNumElements();
552 if (NumElements == 0) NumElements = 1;
553 // Arrays are wrapped in structs to allow them to have normal
554 // value semantics (avoiding the array "decay").
555 Out << NameSoFar << " { ";
556 printType(Out, ATy->getElementType(), false,
557 "array[" + utostr(NumElements) + "]");
562 llvm_unreachable("Unhandled case in getTypeProps!");
568 void CWriter::printConstantArray(ConstantArray *CPA, bool Static) {
570 // As a special case, print the array as a string if it is an array of
571 // ubytes or an array of sbytes with positive values.
573 Type *ETy = CPA->getType()->getElementType();
574 bool isString = (ETy == Type::getInt8Ty(CPA->getContext()) ||
575 ETy == Type::getInt8Ty(CPA->getContext()));
577 // Make sure the last character is a null char, as automatically added by C
578 if (isString && (CPA->getNumOperands() == 0 ||
579 !cast<Constant>(*(CPA->op_end()-1))->isNullValue()))
584 // Keep track of whether the last number was a hexadecimal escape.
585 bool LastWasHex = false;
587 // Do not include the last character, which we know is null
588 for (unsigned i = 0, e = CPA->getNumOperands()-1; i != e; ++i) {
589 unsigned char C = cast<ConstantInt>(CPA->getOperand(i))->getZExtValue();
591 // Print it out literally if it is a printable character. The only thing
592 // to be careful about is when the last letter output was a hex escape
593 // code, in which case we have to be careful not to print out hex digits
594 // explicitly (the C compiler thinks it is a continuation of the previous
595 // character, sheesh...)
597 if (isprint(C) && (!LastWasHex || !isxdigit(C))) {
599 if (C == '"' || C == '\\')
600 Out << "\\" << (char)C;
606 case '\n': Out << "\\n"; break;
607 case '\t': Out << "\\t"; break;
608 case '\r': Out << "\\r"; break;
609 case '\v': Out << "\\v"; break;
610 case '\a': Out << "\\a"; break;
611 case '\"': Out << "\\\""; break;
612 case '\'': Out << "\\\'"; break;
615 Out << (char)(( C/16 < 10) ? ( C/16 +'0') : ( C/16 -10+'A'));
616 Out << (char)(((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A'));
625 if (CPA->getNumOperands()) {
627 printConstant(cast<Constant>(CPA->getOperand(0)), Static);
628 for (unsigned i = 1, e = CPA->getNumOperands(); i != e; ++i) {
630 printConstant(cast<Constant>(CPA->getOperand(i)), Static);
637 void CWriter::printConstantVector(ConstantVector *CP, bool Static) {
639 if (CP->getNumOperands()) {
641 printConstant(cast<Constant>(CP->getOperand(0)), Static);
642 for (unsigned i = 1, e = CP->getNumOperands(); i != e; ++i) {
644 printConstant(cast<Constant>(CP->getOperand(i)), Static);
650 // isFPCSafeToPrint - Returns true if we may assume that CFP may be written out
651 // textually as a double (rather than as a reference to a stack-allocated
652 // variable). We decide this by converting CFP to a string and back into a
653 // double, and then checking whether the conversion results in a bit-equal
654 // double to the original value of CFP. This depends on us and the target C
655 // compiler agreeing on the conversion process (which is pretty likely since we
656 // only deal in IEEE FP).
658 static bool isFPCSafeToPrint(const ConstantFP *CFP) {
660 // Do long doubles in hex for now.
661 if (CFP->getType() != Type::getFloatTy(CFP->getContext()) &&
662 CFP->getType() != Type::getDoubleTy(CFP->getContext()))
664 APFloat APF = APFloat(CFP->getValueAPF()); // copy
665 if (CFP->getType() == Type::getFloatTy(CFP->getContext()))
666 APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &ignored);
667 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
669 sprintf(Buffer, "%a", APF.convertToDouble());
670 if (!strncmp(Buffer, "0x", 2) ||
671 !strncmp(Buffer, "-0x", 3) ||
672 !strncmp(Buffer, "+0x", 3))
673 return APF.bitwiseIsEqual(APFloat(atof(Buffer)));
676 std::string StrVal = ftostr(APF);
678 while (StrVal[0] == ' ')
679 StrVal.erase(StrVal.begin());
681 // Check to make sure that the stringized number is not some string like "Inf"
682 // or NaN. Check that the string matches the "[-+]?[0-9]" regex.
683 if ((StrVal[0] >= '0' && StrVal[0] <= '9') ||
684 ((StrVal[0] == '-' || StrVal[0] == '+') &&
685 (StrVal[1] >= '0' && StrVal[1] <= '9')))
686 // Reparse stringized version!
687 return APF.bitwiseIsEqual(APFloat(atof(StrVal.c_str())));
692 /// Print out the casting for a cast operation. This does the double casting
693 /// necessary for conversion to the destination type, if necessary.
694 /// @brief Print a cast
695 void CWriter::printCast(unsigned opc, Type *SrcTy, Type *DstTy) {
696 // Print the destination type cast
698 case Instruction::UIToFP:
699 case Instruction::SIToFP:
700 case Instruction::IntToPtr:
701 case Instruction::Trunc:
702 case Instruction::BitCast:
703 case Instruction::FPExt:
704 case Instruction::FPTrunc: // For these the DstTy sign doesn't matter
706 printType(Out, DstTy);
709 case Instruction::ZExt:
710 case Instruction::PtrToInt:
711 case Instruction::FPToUI: // For these, make sure we get an unsigned dest
713 printSimpleType(Out, DstTy, false);
716 case Instruction::SExt:
717 case Instruction::FPToSI: // For these, make sure we get a signed dest
719 printSimpleType(Out, DstTy, true);
723 llvm_unreachable("Invalid cast opcode");
726 // Print the source type cast
728 case Instruction::UIToFP:
729 case Instruction::ZExt:
731 printSimpleType(Out, SrcTy, false);
734 case Instruction::SIToFP:
735 case Instruction::SExt:
737 printSimpleType(Out, SrcTy, true);
740 case Instruction::IntToPtr:
741 case Instruction::PtrToInt:
742 // Avoid "cast to pointer from integer of different size" warnings
743 Out << "(unsigned long)";
745 case Instruction::Trunc:
746 case Instruction::BitCast:
747 case Instruction::FPExt:
748 case Instruction::FPTrunc:
749 case Instruction::FPToSI:
750 case Instruction::FPToUI:
751 break; // These don't need a source cast.
753 llvm_unreachable("Invalid cast opcode");
758 // printConstant - The LLVM Constant to C Constant converter.
759 void CWriter::printConstant(Constant *CPV, bool Static) {
760 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
761 switch (CE->getOpcode()) {
762 case Instruction::Trunc:
763 case Instruction::ZExt:
764 case Instruction::SExt:
765 case Instruction::FPTrunc:
766 case Instruction::FPExt:
767 case Instruction::UIToFP:
768 case Instruction::SIToFP:
769 case Instruction::FPToUI:
770 case Instruction::FPToSI:
771 case Instruction::PtrToInt:
772 case Instruction::IntToPtr:
773 case Instruction::BitCast:
775 printCast(CE->getOpcode(), CE->getOperand(0)->getType(), CE->getType());
776 if (CE->getOpcode() == Instruction::SExt &&
777 CE->getOperand(0)->getType() == Type::getInt1Ty(CPV->getContext())) {
778 // Make sure we really sext from bool here by subtracting from 0
781 printConstant(CE->getOperand(0), Static);
782 if (CE->getType() == Type::getInt1Ty(CPV->getContext()) &&
783 (CE->getOpcode() == Instruction::Trunc ||
784 CE->getOpcode() == Instruction::FPToUI ||
785 CE->getOpcode() == Instruction::FPToSI ||
786 CE->getOpcode() == Instruction::PtrToInt)) {
787 // Make sure we really truncate to bool here by anding with 1
793 case Instruction::GetElementPtr:
795 printGEPExpression(CE->getOperand(0), gep_type_begin(CPV),
796 gep_type_end(CPV), Static);
799 case Instruction::Select:
801 printConstant(CE->getOperand(0), Static);
803 printConstant(CE->getOperand(1), Static);
805 printConstant(CE->getOperand(2), Static);
808 case Instruction::Add:
809 case Instruction::FAdd:
810 case Instruction::Sub:
811 case Instruction::FSub:
812 case Instruction::Mul:
813 case Instruction::FMul:
814 case Instruction::SDiv:
815 case Instruction::UDiv:
816 case Instruction::FDiv:
817 case Instruction::URem:
818 case Instruction::SRem:
819 case Instruction::FRem:
820 case Instruction::And:
821 case Instruction::Or:
822 case Instruction::Xor:
823 case Instruction::ICmp:
824 case Instruction::Shl:
825 case Instruction::LShr:
826 case Instruction::AShr:
829 bool NeedsClosingParens = printConstExprCast(CE, Static);
830 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
831 switch (CE->getOpcode()) {
832 case Instruction::Add:
833 case Instruction::FAdd: Out << " + "; break;
834 case Instruction::Sub:
835 case Instruction::FSub: Out << " - "; break;
836 case Instruction::Mul:
837 case Instruction::FMul: Out << " * "; break;
838 case Instruction::URem:
839 case Instruction::SRem:
840 case Instruction::FRem: Out << " % "; break;
841 case Instruction::UDiv:
842 case Instruction::SDiv:
843 case Instruction::FDiv: Out << " / "; break;
844 case Instruction::And: Out << " & "; break;
845 case Instruction::Or: Out << " | "; break;
846 case Instruction::Xor: Out << " ^ "; break;
847 case Instruction::Shl: Out << " << "; break;
848 case Instruction::LShr:
849 case Instruction::AShr: Out << " >> "; break;
850 case Instruction::ICmp:
851 switch (CE->getPredicate()) {
852 case ICmpInst::ICMP_EQ: Out << " == "; break;
853 case ICmpInst::ICMP_NE: Out << " != "; break;
854 case ICmpInst::ICMP_SLT:
855 case ICmpInst::ICMP_ULT: Out << " < "; break;
856 case ICmpInst::ICMP_SLE:
857 case ICmpInst::ICMP_ULE: Out << " <= "; break;
858 case ICmpInst::ICMP_SGT:
859 case ICmpInst::ICMP_UGT: Out << " > "; break;
860 case ICmpInst::ICMP_SGE:
861 case ICmpInst::ICMP_UGE: Out << " >= "; break;
862 default: llvm_unreachable("Illegal ICmp predicate");
865 default: llvm_unreachable("Illegal opcode here!");
867 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
868 if (NeedsClosingParens)
873 case Instruction::FCmp: {
875 bool NeedsClosingParens = printConstExprCast(CE, Static);
876 if (CE->getPredicate() == FCmpInst::FCMP_FALSE)
878 else if (CE->getPredicate() == FCmpInst::FCMP_TRUE)
882 switch (CE->getPredicate()) {
883 default: llvm_unreachable("Illegal FCmp predicate");
884 case FCmpInst::FCMP_ORD: op = "ord"; break;
885 case FCmpInst::FCMP_UNO: op = "uno"; break;
886 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
887 case FCmpInst::FCMP_UNE: op = "une"; break;
888 case FCmpInst::FCMP_ULT: op = "ult"; break;
889 case FCmpInst::FCMP_ULE: op = "ule"; break;
890 case FCmpInst::FCMP_UGT: op = "ugt"; break;
891 case FCmpInst::FCMP_UGE: op = "uge"; break;
892 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
893 case FCmpInst::FCMP_ONE: op = "one"; break;
894 case FCmpInst::FCMP_OLT: op = "olt"; break;
895 case FCmpInst::FCMP_OLE: op = "ole"; break;
896 case FCmpInst::FCMP_OGT: op = "ogt"; break;
897 case FCmpInst::FCMP_OGE: op = "oge"; break;
899 Out << "llvm_fcmp_" << op << "(";
900 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
902 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
905 if (NeedsClosingParens)
912 errs() << "CWriter Error: Unhandled constant expression: "
917 } else if (isa<UndefValue>(CPV) && CPV->getType()->isSingleValueType()) {
919 printType(Out, CPV->getType()); // sign doesn't matter
921 if (!CPV->getType()->isVectorTy()) {
929 if (ConstantInt *CI = dyn_cast<ConstantInt>(CPV)) {
930 Type* Ty = CI->getType();
931 if (Ty == Type::getInt1Ty(CPV->getContext()))
932 Out << (CI->getZExtValue() ? '1' : '0');
933 else if (Ty == Type::getInt32Ty(CPV->getContext()))
934 Out << CI->getZExtValue() << 'u';
935 else if (Ty->getPrimitiveSizeInBits() > 32)
936 Out << CI->getZExtValue() << "ull";
939 printSimpleType(Out, Ty, false) << ')';
940 if (CI->isMinValue(true))
941 Out << CI->getZExtValue() << 'u';
943 Out << CI->getSExtValue();
949 switch (CPV->getType()->getTypeID()) {
950 case Type::FloatTyID:
951 case Type::DoubleTyID:
952 case Type::X86_FP80TyID:
953 case Type::PPC_FP128TyID:
954 case Type::FP128TyID: {
955 ConstantFP *FPC = cast<ConstantFP>(CPV);
956 std::map<const ConstantFP*, unsigned>::iterator I = FPConstantMap.find(FPC);
957 if (I != FPConstantMap.end()) {
958 // Because of FP precision problems we must load from a stack allocated
959 // value that holds the value in hex.
960 Out << "(*(" << (FPC->getType() == Type::getFloatTy(CPV->getContext()) ?
962 FPC->getType() == Type::getDoubleTy(CPV->getContext()) ?
965 << "*)&FPConstant" << I->second << ')';
968 if (FPC->getType() == Type::getFloatTy(CPV->getContext()))
969 V = FPC->getValueAPF().convertToFloat();
970 else if (FPC->getType() == Type::getDoubleTy(CPV->getContext()))
971 V = FPC->getValueAPF().convertToDouble();
973 // Long double. Convert the number to double, discarding precision.
974 // This is not awesome, but it at least makes the CBE output somewhat
976 APFloat Tmp = FPC->getValueAPF();
978 Tmp.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &LosesInfo);
979 V = Tmp.convertToDouble();
985 // FIXME the actual NaN bits should be emitted.
986 // The prefix for a quiet NaN is 0x7FF8. For a signalling NaN,
988 const unsigned long QuietNaN = 0x7ff8UL;
989 //const unsigned long SignalNaN = 0x7ff4UL;
991 // We need to grab the first part of the FP #
994 uint64_t ll = DoubleToBits(V);
995 sprintf(Buffer, "0x%llx", static_cast<long long>(ll));
997 std::string Num(&Buffer[0], &Buffer[6]);
998 unsigned long Val = strtoul(Num.c_str(), 0, 16);
1000 if (FPC->getType() == Type::getFloatTy(FPC->getContext()))
1001 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "F(\""
1002 << Buffer << "\") /*nan*/ ";
1004 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "(\""
1005 << Buffer << "\") /*nan*/ ";
1006 } else if (IsInf(V)) {
1008 if (V < 0) Out << '-';
1009 Out << "LLVM_INF" <<
1010 (FPC->getType() == Type::getFloatTy(FPC->getContext()) ? "F" : "")
1014 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
1015 // Print out the constant as a floating point number.
1017 sprintf(Buffer, "%a", V);
1020 Num = ftostr(FPC->getValueAPF());
1028 case Type::ArrayTyID:
1029 // Use C99 compound expression literal initializer syntax.
1032 printType(Out, CPV->getType());
1035 Out << "{ "; // Arrays are wrapped in struct types.
1036 if (ConstantArray *CA = dyn_cast<ConstantArray>(CPV)) {
1037 printConstantArray(CA, Static);
1039 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1040 ArrayType *AT = cast<ArrayType>(CPV->getType());
1042 if (AT->getNumElements()) {
1044 Constant *CZ = Constant::getNullValue(AT->getElementType());
1045 printConstant(CZ, Static);
1046 for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
1048 printConstant(CZ, Static);
1053 Out << " }"; // Arrays are wrapped in struct types.
1056 case Type::VectorTyID:
1057 // Use C99 compound expression literal initializer syntax.
1060 printType(Out, CPV->getType());
1063 if (ConstantVector *CV = dyn_cast<ConstantVector>(CPV)) {
1064 printConstantVector(CV, Static);
1066 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1067 VectorType *VT = cast<VectorType>(CPV->getType());
1069 Constant *CZ = Constant::getNullValue(VT->getElementType());
1070 printConstant(CZ, Static);
1071 for (unsigned i = 1, e = VT->getNumElements(); i != e; ++i) {
1073 printConstant(CZ, Static);
1079 case Type::StructTyID:
1080 // Use C99 compound expression literal initializer syntax.
1083 printType(Out, CPV->getType());
1086 if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
1087 StructType *ST = cast<StructType>(CPV->getType());
1089 if (ST->getNumElements()) {
1091 printConstant(Constant::getNullValue(ST->getElementType(0)), Static);
1092 for (unsigned i = 1, e = ST->getNumElements(); i != e; ++i) {
1094 printConstant(Constant::getNullValue(ST->getElementType(i)), Static);
1100 if (CPV->getNumOperands()) {
1102 printConstant(cast<Constant>(CPV->getOperand(0)), Static);
1103 for (unsigned i = 1, e = CPV->getNumOperands(); i != e; ++i) {
1105 printConstant(cast<Constant>(CPV->getOperand(i)), Static);
1112 case Type::PointerTyID:
1113 if (isa<ConstantPointerNull>(CPV)) {
1115 printType(Out, CPV->getType()); // sign doesn't matter
1116 Out << ")/*NULL*/0)";
1118 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(CPV)) {
1119 writeOperand(GV, Static);
1125 errs() << "Unknown constant type: " << *CPV << "\n";
1127 llvm_unreachable(0);
1131 // Some constant expressions need to be casted back to the original types
1132 // because their operands were casted to the expected type. This function takes
1133 // care of detecting that case and printing the cast for the ConstantExpr.
1134 bool CWriter::printConstExprCast(const ConstantExpr* CE, bool Static) {
1135 bool NeedsExplicitCast = false;
1136 Type *Ty = CE->getOperand(0)->getType();
1137 bool TypeIsSigned = false;
1138 switch (CE->getOpcode()) {
1139 case Instruction::Add:
1140 case Instruction::Sub:
1141 case Instruction::Mul:
1142 // We need to cast integer arithmetic so that it is always performed
1143 // as unsigned, to avoid undefined behavior on overflow.
1144 case Instruction::LShr:
1145 case Instruction::URem:
1146 case Instruction::UDiv: NeedsExplicitCast = true; break;
1147 case Instruction::AShr:
1148 case Instruction::SRem:
1149 case Instruction::SDiv: NeedsExplicitCast = true; TypeIsSigned = true; break;
1150 case Instruction::SExt:
1152 NeedsExplicitCast = true;
1153 TypeIsSigned = true;
1155 case Instruction::ZExt:
1156 case Instruction::Trunc:
1157 case Instruction::FPTrunc:
1158 case Instruction::FPExt:
1159 case Instruction::UIToFP:
1160 case Instruction::SIToFP:
1161 case Instruction::FPToUI:
1162 case Instruction::FPToSI:
1163 case Instruction::PtrToInt:
1164 case Instruction::IntToPtr:
1165 case Instruction::BitCast:
1167 NeedsExplicitCast = true;
1171 if (NeedsExplicitCast) {
1173 if (Ty->isIntegerTy() && Ty != Type::getInt1Ty(Ty->getContext()))
1174 printSimpleType(Out, Ty, TypeIsSigned);
1176 printType(Out, Ty); // not integer, sign doesn't matter
1179 return NeedsExplicitCast;
1182 // Print a constant assuming that it is the operand for a given Opcode. The
1183 // opcodes that care about sign need to cast their operands to the expected
1184 // type before the operation proceeds. This function does the casting.
1185 void CWriter::printConstantWithCast(Constant* CPV, unsigned Opcode) {
1187 // Extract the operand's type, we'll need it.
1188 Type* OpTy = CPV->getType();
1190 // Indicate whether to do the cast or not.
1191 bool shouldCast = false;
1192 bool typeIsSigned = false;
1194 // Based on the Opcode for which this Constant is being written, determine
1195 // the new type to which the operand should be casted by setting the value
1196 // of OpTy. If we change OpTy, also set shouldCast to true so it gets
1200 // for most instructions, it doesn't matter
1202 case Instruction::Add:
1203 case Instruction::Sub:
1204 case Instruction::Mul:
1205 // We need to cast integer arithmetic so that it is always performed
1206 // as unsigned, to avoid undefined behavior on overflow.
1207 case Instruction::LShr:
1208 case Instruction::UDiv:
1209 case Instruction::URem:
1212 case Instruction::AShr:
1213 case Instruction::SDiv:
1214 case Instruction::SRem:
1216 typeIsSigned = true;
1220 // Write out the casted constant if we should, otherwise just write the
1224 printSimpleType(Out, OpTy, typeIsSigned);
1226 printConstant(CPV, false);
1229 printConstant(CPV, false);
1232 std::string CWriter::GetValueName(const Value *Operand) {
1234 // Resolve potential alias.
1235 if (const GlobalAlias *GA = dyn_cast<GlobalAlias>(Operand)) {
1236 if (const Value *V = GA->resolveAliasedGlobal(false))
1240 // Mangle globals with the standard mangler interface for LLC compatibility.
1241 if (const GlobalValue *GV = dyn_cast<GlobalValue>(Operand)) {
1242 SmallString<128> Str;
1243 Mang->getNameWithPrefix(Str, GV, false);
1244 return CBEMangle(Str.str().str());
1247 std::string Name = Operand->getName();
1249 if (Name.empty()) { // Assign unique names to local temporaries.
1250 unsigned &No = AnonValueNumbers[Operand];
1252 No = ++NextAnonValueNumber;
1253 Name = "tmp__" + utostr(No);
1256 std::string VarName;
1257 VarName.reserve(Name.capacity());
1259 for (std::string::iterator I = Name.begin(), E = Name.end();
1263 if (!((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
1264 (ch >= '0' && ch <= '9') || ch == '_')) {
1266 sprintf(buffer, "_%x_", ch);
1272 return "llvm_cbe_" + VarName;
1275 /// writeInstComputationInline - Emit the computation for the specified
1276 /// instruction inline, with no destination provided.
1277 void CWriter::writeInstComputationInline(Instruction &I) {
1278 // We can't currently support integer types other than 1, 8, 16, 32, 64.
1280 Type *Ty = I.getType();
1281 if (Ty->isIntegerTy() && (Ty!=Type::getInt1Ty(I.getContext()) &&
1282 Ty!=Type::getInt8Ty(I.getContext()) &&
1283 Ty!=Type::getInt16Ty(I.getContext()) &&
1284 Ty!=Type::getInt32Ty(I.getContext()) &&
1285 Ty!=Type::getInt64Ty(I.getContext()))) {
1286 report_fatal_error("The C backend does not currently support integer "
1287 "types of widths other than 1, 8, 16, 32, 64.\n"
1288 "This is being tracked as PR 4158.");
1291 // If this is a non-trivial bool computation, make sure to truncate down to
1292 // a 1 bit value. This is important because we want "add i1 x, y" to return
1293 // "0" when x and y are true, not "2" for example.
1294 bool NeedBoolTrunc = false;
1295 if (I.getType() == Type::getInt1Ty(I.getContext()) &&
1296 !isa<ICmpInst>(I) && !isa<FCmpInst>(I))
1297 NeedBoolTrunc = true;
1309 void CWriter::writeOperandInternal(Value *Operand, bool Static) {
1310 if (Instruction *I = dyn_cast<Instruction>(Operand))
1311 // Should we inline this instruction to build a tree?
1312 if (isInlinableInst(*I) && !isDirectAlloca(I)) {
1314 writeInstComputationInline(*I);
1319 Constant* CPV = dyn_cast<Constant>(Operand);
1321 if (CPV && !isa<GlobalValue>(CPV))
1322 printConstant(CPV, Static);
1324 Out << GetValueName(Operand);
1327 void CWriter::writeOperand(Value *Operand, bool Static) {
1328 bool isAddressImplicit = isAddressExposed(Operand);
1329 if (isAddressImplicit)
1330 Out << "(&"; // Global variables are referenced as their addresses by llvm
1332 writeOperandInternal(Operand, Static);
1334 if (isAddressImplicit)
1338 // Some instructions need to have their result value casted back to the
1339 // original types because their operands were casted to the expected type.
1340 // This function takes care of detecting that case and printing the cast
1341 // for the Instruction.
1342 bool CWriter::writeInstructionCast(const Instruction &I) {
1343 Type *Ty = I.getOperand(0)->getType();
1344 switch (I.getOpcode()) {
1345 case Instruction::Add:
1346 case Instruction::Sub:
1347 case Instruction::Mul:
1348 // We need to cast integer arithmetic so that it is always performed
1349 // as unsigned, to avoid undefined behavior on overflow.
1350 case Instruction::LShr:
1351 case Instruction::URem:
1352 case Instruction::UDiv:
1354 printSimpleType(Out, Ty, false);
1357 case Instruction::AShr:
1358 case Instruction::SRem:
1359 case Instruction::SDiv:
1361 printSimpleType(Out, Ty, true);
1369 // Write the operand with a cast to another type based on the Opcode being used.
1370 // This will be used in cases where an instruction has specific type
1371 // requirements (usually signedness) for its operands.
1372 void CWriter::writeOperandWithCast(Value* Operand, unsigned Opcode) {
1374 // Extract the operand's type, we'll need it.
1375 Type* OpTy = Operand->getType();
1377 // Indicate whether to do the cast or not.
1378 bool shouldCast = false;
1380 // Indicate whether the cast should be to a signed type or not.
1381 bool castIsSigned = false;
1383 // Based on the Opcode for which this Operand is being written, determine
1384 // the new type to which the operand should be casted by setting the value
1385 // of OpTy. If we change OpTy, also set shouldCast to true.
1388 // for most instructions, it doesn't matter
1390 case Instruction::Add:
1391 case Instruction::Sub:
1392 case Instruction::Mul:
1393 // We need to cast integer arithmetic so that it is always performed
1394 // as unsigned, to avoid undefined behavior on overflow.
1395 case Instruction::LShr:
1396 case Instruction::UDiv:
1397 case Instruction::URem: // Cast to unsigned first
1399 castIsSigned = false;
1401 case Instruction::GetElementPtr:
1402 case Instruction::AShr:
1403 case Instruction::SDiv:
1404 case Instruction::SRem: // Cast to signed first
1406 castIsSigned = true;
1410 // Write out the casted operand if we should, otherwise just write the
1414 printSimpleType(Out, OpTy, castIsSigned);
1416 writeOperand(Operand);
1419 writeOperand(Operand);
1422 // Write the operand with a cast to another type based on the icmp predicate
1424 void CWriter::writeOperandWithCast(Value* Operand, const ICmpInst &Cmp) {
1425 // This has to do a cast to ensure the operand has the right signedness.
1426 // Also, if the operand is a pointer, we make sure to cast to an integer when
1427 // doing the comparison both for signedness and so that the C compiler doesn't
1428 // optimize things like "p < NULL" to false (p may contain an integer value
1430 bool shouldCast = Cmp.isRelational();
1432 // Write out the casted operand if we should, otherwise just write the
1435 writeOperand(Operand);
1439 // Should this be a signed comparison? If so, convert to signed.
1440 bool castIsSigned = Cmp.isSigned();
1442 // If the operand was a pointer, convert to a large integer type.
1443 Type* OpTy = Operand->getType();
1444 if (OpTy->isPointerTy())
1445 OpTy = TD->getIntPtrType(Operand->getContext());
1448 printSimpleType(Out, OpTy, castIsSigned);
1450 writeOperand(Operand);
1454 // generateCompilerSpecificCode - This is where we add conditional compilation
1455 // directives to cater to specific compilers as need be.
1457 static void generateCompilerSpecificCode(formatted_raw_ostream& Out,
1458 const TargetData *TD) {
1459 // Alloca is hard to get, and we don't want to include stdlib.h here.
1460 Out << "/* get a declaration for alloca */\n"
1461 << "#if defined(__CYGWIN__) || defined(__MINGW32__)\n"
1462 << "#define alloca(x) __builtin_alloca((x))\n"
1463 << "#define _alloca(x) __builtin_alloca((x))\n"
1464 << "#elif defined(__APPLE__)\n"
1465 << "extern void *__builtin_alloca(unsigned long);\n"
1466 << "#define alloca(x) __builtin_alloca(x)\n"
1467 << "#define longjmp _longjmp\n"
1468 << "#define setjmp _setjmp\n"
1469 << "#elif defined(__sun__)\n"
1470 << "#if defined(__sparcv9)\n"
1471 << "extern void *__builtin_alloca(unsigned long);\n"
1473 << "extern void *__builtin_alloca(unsigned int);\n"
1475 << "#define alloca(x) __builtin_alloca(x)\n"
1476 << "#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__arm__)\n"
1477 << "#define alloca(x) __builtin_alloca(x)\n"
1478 << "#elif defined(_MSC_VER)\n"
1479 << "#define inline _inline\n"
1480 << "#define alloca(x) _alloca(x)\n"
1482 << "#include <alloca.h>\n"
1485 // We output GCC specific attributes to preserve 'linkonce'ness on globals.
1486 // If we aren't being compiled with GCC, just drop these attributes.
1487 Out << "#ifndef __GNUC__ /* Can only support \"linkonce\" vars with GCC */\n"
1488 << "#define __attribute__(X)\n"
1491 // On Mac OS X, "external weak" is spelled "__attribute__((weak_import))".
1492 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1493 << "#define __EXTERNAL_WEAK__ __attribute__((weak_import))\n"
1494 << "#elif defined(__GNUC__)\n"
1495 << "#define __EXTERNAL_WEAK__ __attribute__((weak))\n"
1497 << "#define __EXTERNAL_WEAK__\n"
1500 // For now, turn off the weak linkage attribute on Mac OS X. (See above.)
1501 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1502 << "#define __ATTRIBUTE_WEAK__\n"
1503 << "#elif defined(__GNUC__)\n"
1504 << "#define __ATTRIBUTE_WEAK__ __attribute__((weak))\n"
1506 << "#define __ATTRIBUTE_WEAK__\n"
1509 // Add hidden visibility support. FIXME: APPLE_CC?
1510 Out << "#if defined(__GNUC__)\n"
1511 << "#define __HIDDEN__ __attribute__((visibility(\"hidden\")))\n"
1514 // Define NaN and Inf as GCC builtins if using GCC, as 0 otherwise
1515 // From the GCC documentation:
1517 // double __builtin_nan (const char *str)
1519 // This is an implementation of the ISO C99 function nan.
1521 // Since ISO C99 defines this function in terms of strtod, which we do
1522 // not implement, a description of the parsing is in order. The string is
1523 // parsed as by strtol; that is, the base is recognized by leading 0 or
1524 // 0x prefixes. The number parsed is placed in the significand such that
1525 // the least significant bit of the number is at the least significant
1526 // bit of the significand. The number is truncated to fit the significand
1527 // field provided. The significand is forced to be a quiet NaN.
1529 // This function, if given a string literal, is evaluated early enough
1530 // that it is considered a compile-time constant.
1532 // float __builtin_nanf (const char *str)
1534 // Similar to __builtin_nan, except the return type is float.
1536 // double __builtin_inf (void)
1538 // Similar to __builtin_huge_val, except a warning is generated if the
1539 // target floating-point format does not support infinities. This
1540 // function is suitable for implementing the ISO C99 macro INFINITY.
1542 // float __builtin_inff (void)
1544 // Similar to __builtin_inf, except the return type is float.
1545 Out << "#ifdef __GNUC__\n"
1546 << "#define LLVM_NAN(NanStr) __builtin_nan(NanStr) /* Double */\n"
1547 << "#define LLVM_NANF(NanStr) __builtin_nanf(NanStr) /* Float */\n"
1548 << "#define LLVM_NANS(NanStr) __builtin_nans(NanStr) /* Double */\n"
1549 << "#define LLVM_NANSF(NanStr) __builtin_nansf(NanStr) /* Float */\n"
1550 << "#define LLVM_INF __builtin_inf() /* Double */\n"
1551 << "#define LLVM_INFF __builtin_inff() /* Float */\n"
1552 << "#define LLVM_PREFETCH(addr,rw,locality) "
1553 "__builtin_prefetch(addr,rw,locality)\n"
1554 << "#define __ATTRIBUTE_CTOR__ __attribute__((constructor))\n"
1555 << "#define __ATTRIBUTE_DTOR__ __attribute__((destructor))\n"
1556 << "#define LLVM_ASM __asm__\n"
1558 << "#define LLVM_NAN(NanStr) ((double)0.0) /* Double */\n"
1559 << "#define LLVM_NANF(NanStr) 0.0F /* Float */\n"
1560 << "#define LLVM_NANS(NanStr) ((double)0.0) /* Double */\n"
1561 << "#define LLVM_NANSF(NanStr) 0.0F /* Float */\n"
1562 << "#define LLVM_INF ((double)0.0) /* Double */\n"
1563 << "#define LLVM_INFF 0.0F /* Float */\n"
1564 << "#define LLVM_PREFETCH(addr,rw,locality) /* PREFETCH */\n"
1565 << "#define __ATTRIBUTE_CTOR__\n"
1566 << "#define __ATTRIBUTE_DTOR__\n"
1567 << "#define LLVM_ASM(X)\n"
1570 Out << "#if __GNUC__ < 4 /* Old GCC's, or compilers not GCC */ \n"
1571 << "#define __builtin_stack_save() 0 /* not implemented */\n"
1572 << "#define __builtin_stack_restore(X) /* noop */\n"
1575 // Output typedefs for 128-bit integers. If these are needed with a
1576 // 32-bit target or with a C compiler that doesn't support mode(TI),
1577 // more drastic measures will be needed.
1578 Out << "#if __GNUC__ && __LP64__ /* 128-bit integer types */\n"
1579 << "typedef int __attribute__((mode(TI))) llvmInt128;\n"
1580 << "typedef unsigned __attribute__((mode(TI))) llvmUInt128;\n"
1583 // Output target-specific code that should be inserted into main.
1584 Out << "#define CODE_FOR_MAIN() /* Any target-specific code for main()*/\n";
1587 /// FindStaticTors - Given a static ctor/dtor list, unpack its contents into
1588 /// the StaticTors set.
1589 static void FindStaticTors(GlobalVariable *GV, std::set<Function*> &StaticTors){
1590 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
1591 if (!InitList) return;
1593 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
1594 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
1595 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
1597 if (CS->getOperand(1)->isNullValue())
1598 return; // Found a null terminator, exit printing.
1599 Constant *FP = CS->getOperand(1);
1600 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
1602 FP = CE->getOperand(0);
1603 if (Function *F = dyn_cast<Function>(FP))
1604 StaticTors.insert(F);
1608 enum SpecialGlobalClass {
1610 GlobalCtors, GlobalDtors,
1614 /// getGlobalVariableClass - If this is a global that is specially recognized
1615 /// by LLVM, return a code that indicates how we should handle it.
1616 static SpecialGlobalClass getGlobalVariableClass(const GlobalVariable *GV) {
1617 // If this is a global ctors/dtors list, handle it now.
1618 if (GV->hasAppendingLinkage() && GV->use_empty()) {
1619 if (GV->getName() == "llvm.global_ctors")
1621 else if (GV->getName() == "llvm.global_dtors")
1625 // Otherwise, if it is other metadata, don't print it. This catches things
1626 // like debug information.
1627 if (GV->getSection() == "llvm.metadata")
1633 // PrintEscapedString - Print each character of the specified string, escaping
1634 // it if it is not printable or if it is an escape char.
1635 static void PrintEscapedString(const char *Str, unsigned Length,
1637 for (unsigned i = 0; i != Length; ++i) {
1638 unsigned char C = Str[i];
1639 if (isprint(C) && C != '\\' && C != '"')
1648 Out << "\\x" << hexdigit(C >> 4) << hexdigit(C & 0x0F);
1652 // PrintEscapedString - Print each character of the specified string, escaping
1653 // it if it is not printable or if it is an escape char.
1654 static void PrintEscapedString(const std::string &Str, raw_ostream &Out) {
1655 PrintEscapedString(Str.c_str(), Str.size(), Out);
1658 bool CWriter::doInitialization(Module &M) {
1659 FunctionPass::doInitialization(M);
1664 TD = new TargetData(&M);
1665 IL = new IntrinsicLowering(*TD);
1666 IL->AddPrototypes(M);
1669 std::string Triple = TheModule->getTargetTriple();
1671 Triple = llvm::sys::getHostTriple();
1674 if (const Target *Match = TargetRegistry::lookupTarget(Triple, E))
1675 TAsm = Match->createMCAsmInfo(Triple);
1677 TAsm = new CBEMCAsmInfo();
1678 MRI = new MCRegisterInfo();
1679 TCtx = new MCContext(*TAsm, *MRI, NULL);
1680 Mang = new Mangler(*TCtx, *TD);
1682 // Keep track of which functions are static ctors/dtors so they can have
1683 // an attribute added to their prototypes.
1684 std::set<Function*> StaticCtors, StaticDtors;
1685 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1687 switch (getGlobalVariableClass(I)) {
1690 FindStaticTors(I, StaticCtors);
1693 FindStaticTors(I, StaticDtors);
1698 // get declaration for alloca
1699 Out << "/* Provide Declarations */\n";
1700 Out << "#include <stdarg.h>\n"; // Varargs support
1701 Out << "#include <setjmp.h>\n"; // Unwind support
1702 Out << "#include <limits.h>\n"; // With overflow intrinsics support.
1703 generateCompilerSpecificCode(Out, TD);
1705 // Provide a definition for `bool' if not compiling with a C++ compiler.
1707 << "#ifndef __cplusplus\ntypedef unsigned char bool;\n#endif\n"
1709 << "\n\n/* Support for floating point constants */\n"
1710 << "typedef unsigned long long ConstantDoubleTy;\n"
1711 << "typedef unsigned int ConstantFloatTy;\n"
1712 << "typedef struct { unsigned long long f1; unsigned short f2; "
1713 "unsigned short pad[3]; } ConstantFP80Ty;\n"
1714 // This is used for both kinds of 128-bit long double; meaning differs.
1715 << "typedef struct { unsigned long long f1; unsigned long long f2; }"
1716 " ConstantFP128Ty;\n"
1717 << "\n\n/* Global Declarations */\n";
1719 // First output all the declarations for the program, because C requires
1720 // Functions & globals to be declared before they are used.
1722 if (!M.getModuleInlineAsm().empty()) {
1723 Out << "/* Module asm statements */\n"
1726 // Split the string into lines, to make it easier to read the .ll file.
1727 std::string Asm = M.getModuleInlineAsm();
1729 size_t NewLine = Asm.find_first_of('\n', CurPos);
1730 while (NewLine != std::string::npos) {
1731 // We found a newline, print the portion of the asm string from the
1732 // last newline up to this newline.
1734 PrintEscapedString(std::string(Asm.begin()+CurPos, Asm.begin()+NewLine),
1738 NewLine = Asm.find_first_of('\n', CurPos);
1741 PrintEscapedString(std::string(Asm.begin()+CurPos, Asm.end()), Out);
1743 << "/* End Module asm statements */\n";
1746 // Loop over the symbol table, emitting all named constants.
1749 // Global variable declarations...
1750 if (!M.global_empty()) {
1751 Out << "\n/* External Global Variable Declarations */\n";
1752 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1755 if (I->hasExternalLinkage() || I->hasExternalWeakLinkage() ||
1756 I->hasCommonLinkage())
1758 else if (I->hasDLLImportLinkage())
1759 Out << "__declspec(dllimport) ";
1761 continue; // Internal Global
1763 // Thread Local Storage
1764 if (I->isThreadLocal())
1767 printType(Out, I->getType()->getElementType(), false, GetValueName(I));
1769 if (I->hasExternalWeakLinkage())
1770 Out << " __EXTERNAL_WEAK__";
1775 // Function declarations
1776 Out << "\n/* Function Declarations */\n";
1777 Out << "double fmod(double, double);\n"; // Support for FP rem
1778 Out << "float fmodf(float, float);\n";
1779 Out << "long double fmodl(long double, long double);\n";
1781 // Store the intrinsics which will be declared/defined below.
1782 SmallVector<const Function*, 8> intrinsicsToDefine;
1784 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
1785 // Don't print declarations for intrinsic functions.
1786 // Store the used intrinsics, which need to be explicitly defined.
1787 if (I->isIntrinsic()) {
1788 switch (I->getIntrinsicID()) {
1791 case Intrinsic::uadd_with_overflow:
1792 case Intrinsic::sadd_with_overflow:
1793 intrinsicsToDefine.push_back(I);
1799 if (I->getName() == "setjmp" ||
1800 I->getName() == "longjmp" || I->getName() == "_setjmp")
1803 if (I->hasExternalWeakLinkage())
1805 printFunctionSignature(I, true);
1806 if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
1807 Out << " __ATTRIBUTE_WEAK__";
1808 if (I->hasExternalWeakLinkage())
1809 Out << " __EXTERNAL_WEAK__";
1810 if (StaticCtors.count(I))
1811 Out << " __ATTRIBUTE_CTOR__";
1812 if (StaticDtors.count(I))
1813 Out << " __ATTRIBUTE_DTOR__";
1814 if (I->hasHiddenVisibility())
1815 Out << " __HIDDEN__";
1817 if (I->hasName() && I->getName()[0] == 1)
1818 Out << " LLVM_ASM(\"" << I->getName().substr(1) << "\")";
1823 // Output the global variable declarations
1824 if (!M.global_empty()) {
1825 Out << "\n\n/* Global Variable Declarations */\n";
1826 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1828 if (!I->isDeclaration()) {
1829 // Ignore special globals, such as debug info.
1830 if (getGlobalVariableClass(I))
1833 if (I->hasLocalLinkage())
1838 // Thread Local Storage
1839 if (I->isThreadLocal())
1842 printType(Out, I->getType()->getElementType(), false,
1845 if (I->hasLinkOnceLinkage())
1846 Out << " __attribute__((common))";
1847 else if (I->hasCommonLinkage()) // FIXME is this right?
1848 Out << " __ATTRIBUTE_WEAK__";
1849 else if (I->hasWeakLinkage())
1850 Out << " __ATTRIBUTE_WEAK__";
1851 else if (I->hasExternalWeakLinkage())
1852 Out << " __EXTERNAL_WEAK__";
1853 if (I->hasHiddenVisibility())
1854 Out << " __HIDDEN__";
1859 // Output the global variable definitions and contents...
1860 if (!M.global_empty()) {
1861 Out << "\n\n/* Global Variable Definitions and Initialization */\n";
1862 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1864 if (!I->isDeclaration()) {
1865 // Ignore special globals, such as debug info.
1866 if (getGlobalVariableClass(I))
1869 if (I->hasLocalLinkage())
1871 else if (I->hasDLLImportLinkage())
1872 Out << "__declspec(dllimport) ";
1873 else if (I->hasDLLExportLinkage())
1874 Out << "__declspec(dllexport) ";
1876 // Thread Local Storage
1877 if (I->isThreadLocal())
1880 printType(Out, I->getType()->getElementType(), false,
1882 if (I->hasLinkOnceLinkage())
1883 Out << " __attribute__((common))";
1884 else if (I->hasWeakLinkage())
1885 Out << " __ATTRIBUTE_WEAK__";
1886 else if (I->hasCommonLinkage())
1887 Out << " __ATTRIBUTE_WEAK__";
1889 if (I->hasHiddenVisibility())
1890 Out << " __HIDDEN__";
1892 // If the initializer is not null, emit the initializer. If it is null,
1893 // we try to avoid emitting large amounts of zeros. The problem with
1894 // this, however, occurs when the variable has weak linkage. In this
1895 // case, the assembler will complain about the variable being both weak
1896 // and common, so we disable this optimization.
1897 // FIXME common linkage should avoid this problem.
1898 if (!I->getInitializer()->isNullValue()) {
1900 writeOperand(I->getInitializer(), true);
1901 } else if (I->hasWeakLinkage()) {
1902 // We have to specify an initializer, but it doesn't have to be
1903 // complete. If the value is an aggregate, print out { 0 }, and let
1904 // the compiler figure out the rest of the zeros.
1906 if (I->getInitializer()->getType()->isStructTy() ||
1907 I->getInitializer()->getType()->isVectorTy()) {
1909 } else if (I->getInitializer()->getType()->isArrayTy()) {
1910 // As with structs and vectors, but with an extra set of braces
1911 // because arrays are wrapped in structs.
1914 // Just print it out normally.
1915 writeOperand(I->getInitializer(), true);
1923 Out << "\n\n/* Function Bodies */\n";
1925 // Emit some helper functions for dealing with FCMP instruction's
1927 Out << "static inline int llvm_fcmp_ord(double X, double Y) { ";
1928 Out << "return X == X && Y == Y; }\n";
1929 Out << "static inline int llvm_fcmp_uno(double X, double Y) { ";
1930 Out << "return X != X || Y != Y; }\n";
1931 Out << "static inline int llvm_fcmp_ueq(double X, double Y) { ";
1932 Out << "return X == Y || llvm_fcmp_uno(X, Y); }\n";
1933 Out << "static inline int llvm_fcmp_une(double X, double Y) { ";
1934 Out << "return X != Y; }\n";
1935 Out << "static inline int llvm_fcmp_ult(double X, double Y) { ";
1936 Out << "return X < Y || llvm_fcmp_uno(X, Y); }\n";
1937 Out << "static inline int llvm_fcmp_ugt(double X, double Y) { ";
1938 Out << "return X > Y || llvm_fcmp_uno(X, Y); }\n";
1939 Out << "static inline int llvm_fcmp_ule(double X, double Y) { ";
1940 Out << "return X <= Y || llvm_fcmp_uno(X, Y); }\n";
1941 Out << "static inline int llvm_fcmp_uge(double X, double Y) { ";
1942 Out << "return X >= Y || llvm_fcmp_uno(X, Y); }\n";
1943 Out << "static inline int llvm_fcmp_oeq(double X, double Y) { ";
1944 Out << "return X == Y ; }\n";
1945 Out << "static inline int llvm_fcmp_one(double X, double Y) { ";
1946 Out << "return X != Y && llvm_fcmp_ord(X, Y); }\n";
1947 Out << "static inline int llvm_fcmp_olt(double X, double Y) { ";
1948 Out << "return X < Y ; }\n";
1949 Out << "static inline int llvm_fcmp_ogt(double X, double Y) { ";
1950 Out << "return X > Y ; }\n";
1951 Out << "static inline int llvm_fcmp_ole(double X, double Y) { ";
1952 Out << "return X <= Y ; }\n";
1953 Out << "static inline int llvm_fcmp_oge(double X, double Y) { ";
1954 Out << "return X >= Y ; }\n";
1956 // Emit definitions of the intrinsics.
1957 for (SmallVector<const Function*, 8>::const_iterator
1958 I = intrinsicsToDefine.begin(),
1959 E = intrinsicsToDefine.end(); I != E; ++I) {
1960 printIntrinsicDefinition(**I, Out);
1967 /// Output all floating point constants that cannot be printed accurately...
1968 void CWriter::printFloatingPointConstants(Function &F) {
1969 // Scan the module for floating point constants. If any FP constant is used
1970 // in the function, we want to redirect it here so that we do not depend on
1971 // the precision of the printed form, unless the printed form preserves
1974 for (constant_iterator I = constant_begin(&F), E = constant_end(&F);
1976 printFloatingPointConstants(*I);
1981 void CWriter::printFloatingPointConstants(const Constant *C) {
1982 // If this is a constant expression, recursively check for constant fp values.
1983 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
1984 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i)
1985 printFloatingPointConstants(CE->getOperand(i));
1989 // Otherwise, check for a FP constant that we need to print.
1990 const ConstantFP *FPC = dyn_cast<ConstantFP>(C);
1992 // Do not put in FPConstantMap if safe.
1993 isFPCSafeToPrint(FPC) ||
1994 // Already printed this constant?
1995 FPConstantMap.count(FPC))
1998 FPConstantMap[FPC] = FPCounter; // Number the FP constants
2000 if (FPC->getType() == Type::getDoubleTy(FPC->getContext())) {
2001 double Val = FPC->getValueAPF().convertToDouble();
2002 uint64_t i = FPC->getValueAPF().bitcastToAPInt().getZExtValue();
2003 Out << "static const ConstantDoubleTy FPConstant" << FPCounter++
2004 << " = 0x" << utohexstr(i)
2005 << "ULL; /* " << Val << " */\n";
2006 } else if (FPC->getType() == Type::getFloatTy(FPC->getContext())) {
2007 float Val = FPC->getValueAPF().convertToFloat();
2008 uint32_t i = (uint32_t)FPC->getValueAPF().bitcastToAPInt().
2010 Out << "static const ConstantFloatTy FPConstant" << FPCounter++
2011 << " = 0x" << utohexstr(i)
2012 << "U; /* " << Val << " */\n";
2013 } else if (FPC->getType() == Type::getX86_FP80Ty(FPC->getContext())) {
2014 // api needed to prevent premature destruction
2015 APInt api = FPC->getValueAPF().bitcastToAPInt();
2016 const uint64_t *p = api.getRawData();
2017 Out << "static const ConstantFP80Ty FPConstant" << FPCounter++
2018 << " = { 0x" << utohexstr(p[0])
2019 << "ULL, 0x" << utohexstr((uint16_t)p[1]) << ",{0,0,0}"
2020 << "}; /* Long double constant */\n";
2021 } else if (FPC->getType() == Type::getPPC_FP128Ty(FPC->getContext()) ||
2022 FPC->getType() == Type::getFP128Ty(FPC->getContext())) {
2023 APInt api = FPC->getValueAPF().bitcastToAPInt();
2024 const uint64_t *p = api.getRawData();
2025 Out << "static const ConstantFP128Ty FPConstant" << FPCounter++
2027 << utohexstr(p[0]) << ", 0x" << utohexstr(p[1])
2028 << "}; /* Long double constant */\n";
2031 llvm_unreachable("Unknown float type!");
2036 /// printSymbolTable - Run through symbol table looking for type names. If a
2037 /// type name is found, emit its declaration...
2039 void CWriter::printModuleTypes() {
2040 Out << "/* Helper union for bitcasts */\n";
2041 Out << "typedef union {\n";
2042 Out << " unsigned int Int32;\n";
2043 Out << " unsigned long long Int64;\n";
2044 Out << " float Float;\n";
2045 Out << " double Double;\n";
2046 Out << "} llvmBitCastUnion;\n";
2048 // Get all of the struct types used in the module.
2049 std::vector<StructType*> StructTypes;
2050 TheModule->findUsedStructTypes(StructTypes);
2052 if (StructTypes.empty()) return;
2054 Out << "/* Structure forward decls */\n";
2056 unsigned NextTypeID = 0;
2058 // If any of them are missing names, add a unique ID to UnnamedStructIDs.
2059 // Print out forward declarations for structure types.
2060 for (unsigned i = 0, e = StructTypes.size(); i != e; ++i) {
2061 StructType *ST = StructTypes[i];
2063 if (ST->isAnonymous() || ST->getName().empty())
2064 UnnamedStructIDs[ST] = NextTypeID++;
2066 std::string Name = getStructName(ST);
2068 Out << "typedef struct " << Name << ' ' << Name << ";\n";
2073 // Keep track of which structures have been printed so far.
2074 SmallPtrSet<Type *, 16> StructPrinted;
2076 // Loop over all structures then push them into the stack so they are
2077 // printed in the correct order.
2079 Out << "/* Structure contents */\n";
2080 for (unsigned i = 0, e = StructTypes.size(); i != e; ++i)
2081 if (StructTypes[i]->isStructTy())
2082 // Only print out used types!
2083 printContainedStructs(StructTypes[i], StructPrinted);
2086 // Push the struct onto the stack and recursively push all structs
2087 // this one depends on.
2089 // TODO: Make this work properly with vector types
2091 void CWriter::printContainedStructs(Type *Ty,
2092 SmallPtrSet<Type *, 16> &StructPrinted) {
2093 // Don't walk through pointers.
2094 if (Ty->isPointerTy() || Ty->isPrimitiveType() || Ty->isIntegerTy())
2097 // Print all contained types first.
2098 for (Type::subtype_iterator I = Ty->subtype_begin(),
2099 E = Ty->subtype_end(); I != E; ++I)
2100 printContainedStructs(*I, StructPrinted);
2102 if (StructType *ST = dyn_cast<StructType>(Ty)) {
2103 // Check to see if we have already printed this struct.
2104 if (!StructPrinted.insert(Ty)) return;
2106 // Print structure type out.
2107 printType(Out, ST, false, getStructName(ST), true);
2112 void CWriter::printFunctionSignature(const Function *F, bool Prototype) {
2113 /// isStructReturn - Should this function actually return a struct by-value?
2114 bool isStructReturn = F->hasStructRetAttr();
2116 if (F->hasLocalLinkage()) Out << "static ";
2117 if (F->hasDLLImportLinkage()) Out << "__declspec(dllimport) ";
2118 if (F->hasDLLExportLinkage()) Out << "__declspec(dllexport) ";
2119 switch (F->getCallingConv()) {
2120 case CallingConv::X86_StdCall:
2121 Out << "__attribute__((stdcall)) ";
2123 case CallingConv::X86_FastCall:
2124 Out << "__attribute__((fastcall)) ";
2126 case CallingConv::X86_ThisCall:
2127 Out << "__attribute__((thiscall)) ";
2133 // Loop over the arguments, printing them...
2134 FunctionType *FT = cast<FunctionType>(F->getFunctionType());
2135 const AttrListPtr &PAL = F->getAttributes();
2138 raw_string_ostream FunctionInnards(tstr);
2140 // Print out the name...
2141 FunctionInnards << GetValueName(F) << '(';
2143 bool PrintedArg = false;
2144 if (!F->isDeclaration()) {
2145 if (!F->arg_empty()) {
2146 Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
2149 // If this is a struct-return function, don't print the hidden
2150 // struct-return argument.
2151 if (isStructReturn) {
2152 assert(I != E && "Invalid struct return function!");
2157 std::string ArgName;
2158 for (; I != E; ++I) {
2159 if (PrintedArg) FunctionInnards << ", ";
2160 if (I->hasName() || !Prototype)
2161 ArgName = GetValueName(I);
2164 Type *ArgTy = I->getType();
2165 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2166 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2167 ByValParams.insert(I);
2169 printType(FunctionInnards, ArgTy,
2170 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt),
2177 // Loop over the arguments, printing them.
2178 FunctionType::param_iterator I = FT->param_begin(), E = FT->param_end();
2181 // If this is a struct-return function, don't print the hidden
2182 // struct-return argument.
2183 if (isStructReturn) {
2184 assert(I != E && "Invalid struct return function!");
2189 for (; I != E; ++I) {
2190 if (PrintedArg) FunctionInnards << ", ";
2192 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2193 assert(ArgTy->isPointerTy());
2194 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2196 printType(FunctionInnards, ArgTy,
2197 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt));
2203 if (!PrintedArg && FT->isVarArg()) {
2204 FunctionInnards << "int vararg_dummy_arg";
2208 // Finish printing arguments... if this is a vararg function, print the ...,
2209 // unless there are no known types, in which case, we just emit ().
2211 if (FT->isVarArg() && PrintedArg) {
2212 FunctionInnards << ",..."; // Output varargs portion of signature!
2213 } else if (!FT->isVarArg() && !PrintedArg) {
2214 FunctionInnards << "void"; // ret() -> ret(void) in C.
2216 FunctionInnards << ')';
2218 // Get the return tpe for the function.
2220 if (!isStructReturn)
2221 RetTy = F->getReturnType();
2223 // If this is a struct-return function, print the struct-return type.
2224 RetTy = cast<PointerType>(FT->getParamType(0))->getElementType();
2227 // Print out the return type and the signature built above.
2228 printType(Out, RetTy,
2229 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt),
2230 FunctionInnards.str());
2233 static inline bool isFPIntBitCast(const Instruction &I) {
2234 if (!isa<BitCastInst>(I))
2236 Type *SrcTy = I.getOperand(0)->getType();
2237 Type *DstTy = I.getType();
2238 return (SrcTy->isFloatingPointTy() && DstTy->isIntegerTy()) ||
2239 (DstTy->isFloatingPointTy() && SrcTy->isIntegerTy());
2242 void CWriter::printFunction(Function &F) {
2243 /// isStructReturn - Should this function actually return a struct by-value?
2244 bool isStructReturn = F.hasStructRetAttr();
2246 printFunctionSignature(&F, false);
2249 // If this is a struct return function, handle the result with magic.
2250 if (isStructReturn) {
2252 cast<PointerType>(F.arg_begin()->getType())->getElementType();
2254 printType(Out, StructTy, false, "StructReturn");
2255 Out << "; /* Struct return temporary */\n";
2258 printType(Out, F.arg_begin()->getType(), false,
2259 GetValueName(F.arg_begin()));
2260 Out << " = &StructReturn;\n";
2263 bool PrintedVar = false;
2265 // print local variable information for the function
2266 for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I) {
2267 if (const AllocaInst *AI = isDirectAlloca(&*I)) {
2269 printType(Out, AI->getAllocatedType(), false, GetValueName(AI));
2270 Out << "; /* Address-exposed local */\n";
2272 } else if (I->getType() != Type::getVoidTy(F.getContext()) &&
2273 !isInlinableInst(*I)) {
2275 printType(Out, I->getType(), false, GetValueName(&*I));
2278 if (isa<PHINode>(*I)) { // Print out PHI node temporaries as well...
2280 printType(Out, I->getType(), false,
2281 GetValueName(&*I)+"__PHI_TEMPORARY");
2286 // We need a temporary for the BitCast to use so it can pluck a value out
2287 // of a union to do the BitCast. This is separate from the need for a
2288 // variable to hold the result of the BitCast.
2289 if (isFPIntBitCast(*I)) {
2290 Out << " llvmBitCastUnion " << GetValueName(&*I)
2291 << "__BITCAST_TEMPORARY;\n";
2299 if (F.hasExternalLinkage() && F.getName() == "main")
2300 Out << " CODE_FOR_MAIN();\n";
2302 // print the basic blocks
2303 for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
2304 if (Loop *L = LI->getLoopFor(BB)) {
2305 if (L->getHeader() == BB && L->getParentLoop() == 0)
2308 printBasicBlock(BB);
2315 void CWriter::printLoop(Loop *L) {
2316 Out << " do { /* Syntactic loop '" << L->getHeader()->getName()
2317 << "' to make GCC happy */\n";
2318 for (unsigned i = 0, e = L->getBlocks().size(); i != e; ++i) {
2319 BasicBlock *BB = L->getBlocks()[i];
2320 Loop *BBLoop = LI->getLoopFor(BB);
2322 printBasicBlock(BB);
2323 else if (BB == BBLoop->getHeader() && BBLoop->getParentLoop() == L)
2326 Out << " } while (1); /* end of syntactic loop '"
2327 << L->getHeader()->getName() << "' */\n";
2330 void CWriter::printBasicBlock(BasicBlock *BB) {
2332 // Don't print the label for the basic block if there are no uses, or if
2333 // the only terminator use is the predecessor basic block's terminator.
2334 // We have to scan the use list because PHI nodes use basic blocks too but
2335 // do not require a label to be generated.
2337 bool NeedsLabel = false;
2338 for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI)
2339 if (isGotoCodeNecessary(*PI, BB)) {
2344 if (NeedsLabel) Out << GetValueName(BB) << ":\n";
2346 // Output all of the instructions in the basic block...
2347 for (BasicBlock::iterator II = BB->begin(), E = --BB->end(); II != E;
2349 if (!isInlinableInst(*II) && !isDirectAlloca(II)) {
2350 if (II->getType() != Type::getVoidTy(BB->getContext()) &&
2355 writeInstComputationInline(*II);
2360 // Don't emit prefix or suffix for the terminator.
2361 visit(*BB->getTerminator());
2365 // Specific Instruction type classes... note that all of the casts are
2366 // necessary because we use the instruction classes as opaque types...
2368 void CWriter::visitReturnInst(ReturnInst &I) {
2369 // If this is a struct return function, return the temporary struct.
2370 bool isStructReturn = I.getParent()->getParent()->hasStructRetAttr();
2372 if (isStructReturn) {
2373 Out << " return StructReturn;\n";
2377 // Don't output a void return if this is the last basic block in the function
2378 if (I.getNumOperands() == 0 &&
2379 &*--I.getParent()->getParent()->end() == I.getParent() &&
2380 !I.getParent()->size() == 1) {
2385 if (I.getNumOperands()) {
2387 writeOperand(I.getOperand(0));
2392 void CWriter::visitSwitchInst(SwitchInst &SI) {
2395 writeOperand(SI.getOperand(0));
2396 Out << ") {\n default:\n";
2397 printPHICopiesForSuccessor (SI.getParent(), SI.getDefaultDest(), 2);
2398 printBranchToBlock(SI.getParent(), SI.getDefaultDest(), 2);
2400 for (unsigned i = 2, e = SI.getNumOperands(); i != e; i += 2) {
2402 writeOperand(SI.getOperand(i));
2404 BasicBlock *Succ = cast<BasicBlock>(SI.getOperand(i+1));
2405 printPHICopiesForSuccessor (SI.getParent(), Succ, 2);
2406 printBranchToBlock(SI.getParent(), Succ, 2);
2407 if (Function::iterator(Succ) == llvm::next(Function::iterator(SI.getParent())))
2413 void CWriter::visitIndirectBrInst(IndirectBrInst &IBI) {
2414 Out << " goto *(void*)(";
2415 writeOperand(IBI.getOperand(0));
2419 void CWriter::visitUnreachableInst(UnreachableInst &I) {
2420 Out << " /*UNREACHABLE*/;\n";
2423 bool CWriter::isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
2424 /// FIXME: This should be reenabled, but loop reordering safe!!
2427 if (llvm::next(Function::iterator(From)) != Function::iterator(To))
2428 return true; // Not the direct successor, we need a goto.
2430 //isa<SwitchInst>(From->getTerminator())
2432 if (LI->getLoopFor(From) != LI->getLoopFor(To))
2437 void CWriter::printPHICopiesForSuccessor (BasicBlock *CurBlock,
2438 BasicBlock *Successor,
2440 for (BasicBlock::iterator I = Successor->begin(); isa<PHINode>(I); ++I) {
2441 PHINode *PN = cast<PHINode>(I);
2442 // Now we have to do the printing.
2443 Value *IV = PN->getIncomingValueForBlock(CurBlock);
2444 if (!isa<UndefValue>(IV)) {
2445 Out << std::string(Indent, ' ');
2446 Out << " " << GetValueName(I) << "__PHI_TEMPORARY = ";
2448 Out << "; /* for PHI node */\n";
2453 void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
2455 if (isGotoCodeNecessary(CurBB, Succ)) {
2456 Out << std::string(Indent, ' ') << " goto ";
2462 // Branch instruction printing - Avoid printing out a branch to a basic block
2463 // that immediately succeeds the current one.
2465 void CWriter::visitBranchInst(BranchInst &I) {
2467 if (I.isConditional()) {
2468 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(0))) {
2470 writeOperand(I.getCondition());
2473 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 2);
2474 printBranchToBlock(I.getParent(), I.getSuccessor(0), 2);
2476 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(1))) {
2477 Out << " } else {\n";
2478 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2479 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2482 // First goto not necessary, assume second one is...
2484 writeOperand(I.getCondition());
2487 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2488 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2493 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 0);
2494 printBranchToBlock(I.getParent(), I.getSuccessor(0), 0);
2499 // PHI nodes get copied into temporary values at the end of predecessor basic
2500 // blocks. We now need to copy these temporary values into the REAL value for
2502 void CWriter::visitPHINode(PHINode &I) {
2504 Out << "__PHI_TEMPORARY";
2508 void CWriter::visitBinaryOperator(Instruction &I) {
2509 // binary instructions, shift instructions, setCond instructions.
2510 assert(!I.getType()->isPointerTy());
2512 // We must cast the results of binary operations which might be promoted.
2513 bool needsCast = false;
2514 if ((I.getType() == Type::getInt8Ty(I.getContext())) ||
2515 (I.getType() == Type::getInt16Ty(I.getContext()))
2516 || (I.getType() == Type::getFloatTy(I.getContext()))) {
2519 printType(Out, I.getType(), false);
2523 // If this is a negation operation, print it out as such. For FP, we don't
2524 // want to print "-0.0 - X".
2525 if (BinaryOperator::isNeg(&I)) {
2527 writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
2529 } else if (BinaryOperator::isFNeg(&I)) {
2531 writeOperand(BinaryOperator::getFNegArgument(cast<BinaryOperator>(&I)));
2533 } else if (I.getOpcode() == Instruction::FRem) {
2534 // Output a call to fmod/fmodf instead of emitting a%b
2535 if (I.getType() == Type::getFloatTy(I.getContext()))
2537 else if (I.getType() == Type::getDoubleTy(I.getContext()))
2539 else // all 3 flavors of long double
2541 writeOperand(I.getOperand(0));
2543 writeOperand(I.getOperand(1));
2547 // Write out the cast of the instruction's value back to the proper type
2549 bool NeedsClosingParens = writeInstructionCast(I);
2551 // Certain instructions require the operand to be forced to a specific type
2552 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2553 // below for operand 1
2554 writeOperandWithCast(I.getOperand(0), I.getOpcode());
2556 switch (I.getOpcode()) {
2557 case Instruction::Add:
2558 case Instruction::FAdd: Out << " + "; break;
2559 case Instruction::Sub:
2560 case Instruction::FSub: Out << " - "; break;
2561 case Instruction::Mul:
2562 case Instruction::FMul: Out << " * "; break;
2563 case Instruction::URem:
2564 case Instruction::SRem:
2565 case Instruction::FRem: Out << " % "; break;
2566 case Instruction::UDiv:
2567 case Instruction::SDiv:
2568 case Instruction::FDiv: Out << " / "; break;
2569 case Instruction::And: Out << " & "; break;
2570 case Instruction::Or: Out << " | "; break;
2571 case Instruction::Xor: Out << " ^ "; break;
2572 case Instruction::Shl : Out << " << "; break;
2573 case Instruction::LShr:
2574 case Instruction::AShr: Out << " >> "; break;
2577 errs() << "Invalid operator type!" << I;
2579 llvm_unreachable(0);
2582 writeOperandWithCast(I.getOperand(1), I.getOpcode());
2583 if (NeedsClosingParens)
2592 void CWriter::visitICmpInst(ICmpInst &I) {
2593 // We must cast the results of icmp which might be promoted.
2594 bool needsCast = false;
2596 // Write out the cast of the instruction's value back to the proper type
2598 bool NeedsClosingParens = writeInstructionCast(I);
2600 // Certain icmp predicate require the operand to be forced to a specific type
2601 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2602 // below for operand 1
2603 writeOperandWithCast(I.getOperand(0), I);
2605 switch (I.getPredicate()) {
2606 case ICmpInst::ICMP_EQ: Out << " == "; break;
2607 case ICmpInst::ICMP_NE: Out << " != "; break;
2608 case ICmpInst::ICMP_ULE:
2609 case ICmpInst::ICMP_SLE: Out << " <= "; break;
2610 case ICmpInst::ICMP_UGE:
2611 case ICmpInst::ICMP_SGE: Out << " >= "; break;
2612 case ICmpInst::ICMP_ULT:
2613 case ICmpInst::ICMP_SLT: Out << " < "; break;
2614 case ICmpInst::ICMP_UGT:
2615 case ICmpInst::ICMP_SGT: Out << " > "; break;
2618 errs() << "Invalid icmp predicate!" << I;
2620 llvm_unreachable(0);
2623 writeOperandWithCast(I.getOperand(1), I);
2624 if (NeedsClosingParens)
2632 void CWriter::visitFCmpInst(FCmpInst &I) {
2633 if (I.getPredicate() == FCmpInst::FCMP_FALSE) {
2637 if (I.getPredicate() == FCmpInst::FCMP_TRUE) {
2643 switch (I.getPredicate()) {
2644 default: llvm_unreachable("Illegal FCmp predicate");
2645 case FCmpInst::FCMP_ORD: op = "ord"; break;
2646 case FCmpInst::FCMP_UNO: op = "uno"; break;
2647 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
2648 case FCmpInst::FCMP_UNE: op = "une"; break;
2649 case FCmpInst::FCMP_ULT: op = "ult"; break;
2650 case FCmpInst::FCMP_ULE: op = "ule"; break;
2651 case FCmpInst::FCMP_UGT: op = "ugt"; break;
2652 case FCmpInst::FCMP_UGE: op = "uge"; break;
2653 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
2654 case FCmpInst::FCMP_ONE: op = "one"; break;
2655 case FCmpInst::FCMP_OLT: op = "olt"; break;
2656 case FCmpInst::FCMP_OLE: op = "ole"; break;
2657 case FCmpInst::FCMP_OGT: op = "ogt"; break;
2658 case FCmpInst::FCMP_OGE: op = "oge"; break;
2661 Out << "llvm_fcmp_" << op << "(";
2662 // Write the first operand
2663 writeOperand(I.getOperand(0));
2665 // Write the second operand
2666 writeOperand(I.getOperand(1));
2670 static const char * getFloatBitCastField(Type *Ty) {
2671 switch (Ty->getTypeID()) {
2672 default: llvm_unreachable("Invalid Type");
2673 case Type::FloatTyID: return "Float";
2674 case Type::DoubleTyID: return "Double";
2675 case Type::IntegerTyID: {
2676 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
2685 void CWriter::visitCastInst(CastInst &I) {
2686 Type *DstTy = I.getType();
2687 Type *SrcTy = I.getOperand(0)->getType();
2688 if (isFPIntBitCast(I)) {
2690 // These int<->float and long<->double casts need to be handled specially
2691 Out << GetValueName(&I) << "__BITCAST_TEMPORARY."
2692 << getFloatBitCastField(I.getOperand(0)->getType()) << " = ";
2693 writeOperand(I.getOperand(0));
2694 Out << ", " << GetValueName(&I) << "__BITCAST_TEMPORARY."
2695 << getFloatBitCastField(I.getType());
2701 printCast(I.getOpcode(), SrcTy, DstTy);
2703 // Make a sext from i1 work by subtracting the i1 from 0 (an int).
2704 if (SrcTy == Type::getInt1Ty(I.getContext()) &&
2705 I.getOpcode() == Instruction::SExt)
2708 writeOperand(I.getOperand(0));
2710 if (DstTy == Type::getInt1Ty(I.getContext()) &&
2711 (I.getOpcode() == Instruction::Trunc ||
2712 I.getOpcode() == Instruction::FPToUI ||
2713 I.getOpcode() == Instruction::FPToSI ||
2714 I.getOpcode() == Instruction::PtrToInt)) {
2715 // Make sure we really get a trunc to bool by anding the operand with 1
2721 void CWriter::visitSelectInst(SelectInst &I) {
2723 writeOperand(I.getCondition());
2725 writeOperand(I.getTrueValue());
2727 writeOperand(I.getFalseValue());
2731 // Returns the macro name or value of the max or min of an integer type
2732 // (as defined in limits.h).
2733 static void printLimitValue(IntegerType &Ty, bool isSigned, bool isMax,
2736 const char* sprefix = "";
2738 unsigned NumBits = Ty.getBitWidth();
2742 } else if (NumBits <= 16) {
2744 } else if (NumBits <= 32) {
2746 } else if (NumBits <= 64) {
2749 llvm_unreachable("Bit widths > 64 not implemented yet");
2753 Out << sprefix << type << (isMax ? "_MAX" : "_MIN");
2755 Out << "U" << type << (isMax ? "_MAX" : "0");
2759 static bool isSupportedIntegerSize(IntegerType &T) {
2760 return T.getBitWidth() == 8 || T.getBitWidth() == 16 ||
2761 T.getBitWidth() == 32 || T.getBitWidth() == 64;
2765 void CWriter::printIntrinsicDefinition(const Function &F, raw_ostream &Out) {
2766 FunctionType *funT = F.getFunctionType();
2767 Type *retT = F.getReturnType();
2768 IntegerType *elemT = cast<IntegerType>(funT->getParamType(1));
2770 assert(isSupportedIntegerSize(*elemT) &&
2771 "CBackend does not support arbitrary size integers.");
2772 assert(cast<StructType>(retT)->getElementType(0) == elemT &&
2773 elemT == funT->getParamType(0) && funT->getNumParams() == 2);
2775 switch (F.getIntrinsicID()) {
2777 llvm_unreachable("Unsupported Intrinsic.");
2778 case Intrinsic::uadd_with_overflow:
2779 // static inline Rty uadd_ixx(unsigned ixx a, unsigned ixx b) {
2781 // r.field0 = a + b;
2782 // r.field1 = (r.field0 < a);
2785 Out << "static inline ";
2786 printType(Out, retT);
2787 Out << GetValueName(&F);
2789 printSimpleType(Out, elemT, false);
2791 printSimpleType(Out, elemT, false);
2793 printType(Out, retT);
2795 Out << " r.field0 = a + b;\n";
2796 Out << " r.field1 = (r.field0 < a);\n";
2797 Out << " return r;\n}\n";
2800 case Intrinsic::sadd_with_overflow:
2801 // static inline Rty sadd_ixx(ixx a, ixx b) {
2803 // r.field1 = (b > 0 && a > XX_MAX - b) ||
2804 // (b < 0 && a < XX_MIN - b);
2805 // r.field0 = r.field1 ? 0 : a + b;
2809 printType(Out, retT);
2810 Out << GetValueName(&F);
2812 printSimpleType(Out, elemT, true);
2814 printSimpleType(Out, elemT, true);
2816 printType(Out, retT);
2818 Out << " r.field1 = (b > 0 && a > ";
2819 printLimitValue(*elemT, true, true, Out);
2820 Out << " - b) || (b < 0 && a < ";
2821 printLimitValue(*elemT, true, false, Out);
2823 Out << " r.field0 = r.field1 ? 0 : a + b;\n";
2824 Out << " return r;\n}\n";
2829 void CWriter::lowerIntrinsics(Function &F) {
2830 // This is used to keep track of intrinsics that get generated to a lowered
2831 // function. We must generate the prototypes before the function body which
2832 // will only be expanded on first use (by the loop below).
2833 std::vector<Function*> prototypesToGen;
2835 // Examine all the instructions in this function to find the intrinsics that
2836 // need to be lowered.
2837 for (Function::iterator BB = F.begin(), EE = F.end(); BB != EE; ++BB)
2838 for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; )
2839 if (CallInst *CI = dyn_cast<CallInst>(I++))
2840 if (Function *F = CI->getCalledFunction())
2841 switch (F->getIntrinsicID()) {
2842 case Intrinsic::not_intrinsic:
2843 case Intrinsic::memory_barrier:
2844 case Intrinsic::vastart:
2845 case Intrinsic::vacopy:
2846 case Intrinsic::vaend:
2847 case Intrinsic::returnaddress:
2848 case Intrinsic::frameaddress:
2849 case Intrinsic::setjmp:
2850 case Intrinsic::longjmp:
2851 case Intrinsic::prefetch:
2852 case Intrinsic::powi:
2853 case Intrinsic::x86_sse_cmp_ss:
2854 case Intrinsic::x86_sse_cmp_ps:
2855 case Intrinsic::x86_sse2_cmp_sd:
2856 case Intrinsic::x86_sse2_cmp_pd:
2857 case Intrinsic::ppc_altivec_lvsl:
2858 case Intrinsic::uadd_with_overflow:
2859 case Intrinsic::sadd_with_overflow:
2860 // We directly implement these intrinsics
2863 // If this is an intrinsic that directly corresponds to a GCC
2864 // builtin, we handle it.
2865 const char *BuiltinName = "";
2866 #define GET_GCC_BUILTIN_NAME
2867 #include "llvm/Intrinsics.gen"
2868 #undef GET_GCC_BUILTIN_NAME
2869 // If we handle it, don't lower it.
2870 if (BuiltinName[0]) break;
2872 // All other intrinsic calls we must lower.
2873 Instruction *Before = 0;
2874 if (CI != &BB->front())
2875 Before = prior(BasicBlock::iterator(CI));
2877 IL->LowerIntrinsicCall(CI);
2878 if (Before) { // Move iterator to instruction after call
2883 // If the intrinsic got lowered to another call, and that call has
2884 // a definition then we need to make sure its prototype is emitted
2885 // before any calls to it.
2886 if (CallInst *Call = dyn_cast<CallInst>(I))
2887 if (Function *NewF = Call->getCalledFunction())
2888 if (!NewF->isDeclaration())
2889 prototypesToGen.push_back(NewF);
2894 // We may have collected some prototypes to emit in the loop above.
2895 // Emit them now, before the function that uses them is emitted. But,
2896 // be careful not to emit them twice.
2897 std::vector<Function*>::iterator I = prototypesToGen.begin();
2898 std::vector<Function*>::iterator E = prototypesToGen.end();
2899 for ( ; I != E; ++I) {
2900 if (intrinsicPrototypesAlreadyGenerated.insert(*I).second) {
2902 printFunctionSignature(*I, true);
2908 void CWriter::visitCallInst(CallInst &I) {
2909 if (isa<InlineAsm>(I.getCalledValue()))
2910 return visitInlineAsm(I);
2912 bool WroteCallee = false;
2914 // Handle intrinsic function calls first...
2915 if (Function *F = I.getCalledFunction())
2916 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
2917 if (visitBuiltinCall(I, ID, WroteCallee))
2920 Value *Callee = I.getCalledValue();
2922 PointerType *PTy = cast<PointerType>(Callee->getType());
2923 FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
2925 // If this is a call to a struct-return function, assign to the first
2926 // parameter instead of passing it to the call.
2927 const AttrListPtr &PAL = I.getAttributes();
2928 bool hasByVal = I.hasByValArgument();
2929 bool isStructRet = I.hasStructRetAttr();
2931 writeOperandDeref(I.getArgOperand(0));
2935 if (I.isTailCall()) Out << " /*tail*/ ";
2938 // If this is an indirect call to a struct return function, we need to cast
2939 // the pointer. Ditto for indirect calls with byval arguments.
2940 bool NeedsCast = (hasByVal || isStructRet) && !isa<Function>(Callee);
2942 // GCC is a real PITA. It does not permit codegening casts of functions to
2943 // function pointers if they are in a call (it generates a trap instruction
2944 // instead!). We work around this by inserting a cast to void* in between
2945 // the function and the function pointer cast. Unfortunately, we can't just
2946 // form the constant expression here, because the folder will immediately
2949 // Note finally, that this is completely unsafe. ANSI C does not guarantee
2950 // that void* and function pointers have the same size. :( To deal with this
2951 // in the common case, we handle casts where the number of arguments passed
2954 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Callee))
2956 if (Function *RF = dyn_cast<Function>(CE->getOperand(0))) {
2962 // Ok, just cast the pointer type.
2965 printStructReturnPointerFunctionType(Out, PAL,
2966 cast<PointerType>(I.getCalledValue()->getType()));
2968 printType(Out, I.getCalledValue()->getType(), false, "", true, PAL);
2970 printType(Out, I.getCalledValue()->getType());
2973 writeOperand(Callee);
2974 if (NeedsCast) Out << ')';
2979 bool PrintedArg = false;
2980 if(FTy->isVarArg() && !FTy->getNumParams()) {
2981 Out << "0 /*dummy arg*/";
2985 unsigned NumDeclaredParams = FTy->getNumParams();
2987 CallSite::arg_iterator AI = CS.arg_begin(), AE = CS.arg_end();
2989 if (isStructRet) { // Skip struct return argument.
2995 for (; AI != AE; ++AI, ++ArgNo) {
2996 if (PrintedArg) Out << ", ";
2997 if (ArgNo < NumDeclaredParams &&
2998 (*AI)->getType() != FTy->getParamType(ArgNo)) {
3000 printType(Out, FTy->getParamType(ArgNo),
3001 /*isSigned=*/PAL.paramHasAttr(ArgNo+1, Attribute::SExt));
3004 // Check if the argument is expected to be passed by value.
3005 if (I.paramHasAttr(ArgNo+1, Attribute::ByVal))
3006 writeOperandDeref(*AI);
3014 /// visitBuiltinCall - Handle the call to the specified builtin. Returns true
3015 /// if the entire call is handled, return false if it wasn't handled, and
3016 /// optionally set 'WroteCallee' if the callee has already been printed out.
3017 bool CWriter::visitBuiltinCall(CallInst &I, Intrinsic::ID ID,
3018 bool &WroteCallee) {
3021 // If this is an intrinsic that directly corresponds to a GCC
3022 // builtin, we emit it here.
3023 const char *BuiltinName = "";
3024 Function *F = I.getCalledFunction();
3025 #define GET_GCC_BUILTIN_NAME
3026 #include "llvm/Intrinsics.gen"
3027 #undef GET_GCC_BUILTIN_NAME
3028 assert(BuiltinName[0] && "Unknown LLVM intrinsic!");
3034 case Intrinsic::memory_barrier:
3035 Out << "__sync_synchronize()";
3037 case Intrinsic::vastart:
3040 Out << "va_start(*(va_list*)";
3041 writeOperand(I.getArgOperand(0));
3043 // Output the last argument to the enclosing function.
3044 if (I.getParent()->getParent()->arg_empty())
3045 Out << "vararg_dummy_arg";
3047 writeOperand(--I.getParent()->getParent()->arg_end());
3050 case Intrinsic::vaend:
3051 if (!isa<ConstantPointerNull>(I.getArgOperand(0))) {
3052 Out << "0; va_end(*(va_list*)";
3053 writeOperand(I.getArgOperand(0));
3056 Out << "va_end(*(va_list*)0)";
3059 case Intrinsic::vacopy:
3061 Out << "va_copy(*(va_list*)";
3062 writeOperand(I.getArgOperand(0));
3063 Out << ", *(va_list*)";
3064 writeOperand(I.getArgOperand(1));
3067 case Intrinsic::returnaddress:
3068 Out << "__builtin_return_address(";
3069 writeOperand(I.getArgOperand(0));
3072 case Intrinsic::frameaddress:
3073 Out << "__builtin_frame_address(";
3074 writeOperand(I.getArgOperand(0));
3077 case Intrinsic::powi:
3078 Out << "__builtin_powi(";
3079 writeOperand(I.getArgOperand(0));
3081 writeOperand(I.getArgOperand(1));
3084 case Intrinsic::setjmp:
3085 Out << "setjmp(*(jmp_buf*)";
3086 writeOperand(I.getArgOperand(0));
3089 case Intrinsic::longjmp:
3090 Out << "longjmp(*(jmp_buf*)";
3091 writeOperand(I.getArgOperand(0));
3093 writeOperand(I.getArgOperand(1));
3096 case Intrinsic::prefetch:
3097 Out << "LLVM_PREFETCH((const void *)";
3098 writeOperand(I.getArgOperand(0));
3100 writeOperand(I.getArgOperand(1));
3102 writeOperand(I.getArgOperand(2));
3105 case Intrinsic::stacksave:
3106 // Emit this as: Val = 0; *((void**)&Val) = __builtin_stack_save()
3107 // to work around GCC bugs (see PR1809).
3108 Out << "0; *((void**)&" << GetValueName(&I)
3109 << ") = __builtin_stack_save()";
3111 case Intrinsic::x86_sse_cmp_ss:
3112 case Intrinsic::x86_sse_cmp_ps:
3113 case Intrinsic::x86_sse2_cmp_sd:
3114 case Intrinsic::x86_sse2_cmp_pd:
3116 printType(Out, I.getType());
3118 // Multiple GCC builtins multiplex onto this intrinsic.
3119 switch (cast<ConstantInt>(I.getArgOperand(2))->getZExtValue()) {
3120 default: llvm_unreachable("Invalid llvm.x86.sse.cmp!");
3121 case 0: Out << "__builtin_ia32_cmpeq"; break;
3122 case 1: Out << "__builtin_ia32_cmplt"; break;
3123 case 2: Out << "__builtin_ia32_cmple"; break;
3124 case 3: Out << "__builtin_ia32_cmpunord"; break;
3125 case 4: Out << "__builtin_ia32_cmpneq"; break;
3126 case 5: Out << "__builtin_ia32_cmpnlt"; break;
3127 case 6: Out << "__builtin_ia32_cmpnle"; break;
3128 case 7: Out << "__builtin_ia32_cmpord"; break;
3130 if (ID == Intrinsic::x86_sse_cmp_ps || ID == Intrinsic::x86_sse2_cmp_pd)
3134 if (ID == Intrinsic::x86_sse_cmp_ss || ID == Intrinsic::x86_sse_cmp_ps)
3140 writeOperand(I.getArgOperand(0));
3142 writeOperand(I.getArgOperand(1));
3145 case Intrinsic::ppc_altivec_lvsl:
3147 printType(Out, I.getType());
3149 Out << "__builtin_altivec_lvsl(0, (void*)";
3150 writeOperand(I.getArgOperand(0));
3153 case Intrinsic::uadd_with_overflow:
3154 case Intrinsic::sadd_with_overflow:
3155 Out << GetValueName(I.getCalledFunction()) << "(";
3156 writeOperand(I.getArgOperand(0));
3158 writeOperand(I.getArgOperand(1));
3164 //This converts the llvm constraint string to something gcc is expecting.
3165 //TODO: work out platform independent constraints and factor those out
3166 // of the per target tables
3167 // handle multiple constraint codes
3168 std::string CWriter::InterpretASMConstraint(InlineAsm::ConstraintInfo& c) {
3169 assert(c.Codes.size() == 1 && "Too many asm constraint codes to handle");
3171 // Grab the translation table from MCAsmInfo if it exists.
3172 const MCAsmInfo *TargetAsm;
3173 std::string Triple = TheModule->getTargetTriple();
3175 Triple = llvm::sys::getHostTriple();
3178 if (const Target *Match = TargetRegistry::lookupTarget(Triple, E))
3179 TargetAsm = Match->createMCAsmInfo(Triple);
3183 const char *const *table = TargetAsm->getAsmCBE();
3185 // Search the translation table if it exists.
3186 for (int i = 0; table && table[i]; i += 2)
3187 if (c.Codes[0] == table[i]) {
3192 // Default is identity.
3197 //TODO: import logic from AsmPrinter.cpp
3198 static std::string gccifyAsm(std::string asmstr) {
3199 for (std::string::size_type i = 0; i != asmstr.size(); ++i)
3200 if (asmstr[i] == '\n')
3201 asmstr.replace(i, 1, "\\n");
3202 else if (asmstr[i] == '\t')
3203 asmstr.replace(i, 1, "\\t");
3204 else if (asmstr[i] == '$') {
3205 if (asmstr[i + 1] == '{') {
3206 std::string::size_type a = asmstr.find_first_of(':', i + 1);
3207 std::string::size_type b = asmstr.find_first_of('}', i + 1);
3208 std::string n = "%" +
3209 asmstr.substr(a + 1, b - a - 1) +
3210 asmstr.substr(i + 2, a - i - 2);
3211 asmstr.replace(i, b - i + 1, n);
3214 asmstr.replace(i, 1, "%");
3216 else if (asmstr[i] == '%')//grr
3217 { asmstr.replace(i, 1, "%%"); ++i;}
3222 //TODO: assumptions about what consume arguments from the call are likely wrong
3223 // handle communitivity
3224 void CWriter::visitInlineAsm(CallInst &CI) {
3225 InlineAsm* as = cast<InlineAsm>(CI.getCalledValue());
3226 InlineAsm::ConstraintInfoVector Constraints = as->ParseConstraints();
3228 std::vector<std::pair<Value*, int> > ResultVals;
3229 if (CI.getType() == Type::getVoidTy(CI.getContext()))
3231 else if (StructType *ST = dyn_cast<StructType>(CI.getType())) {
3232 for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i)
3233 ResultVals.push_back(std::make_pair(&CI, (int)i));
3235 ResultVals.push_back(std::make_pair(&CI, -1));
3238 // Fix up the asm string for gcc and emit it.
3239 Out << "__asm__ volatile (\"" << gccifyAsm(as->getAsmString()) << "\"\n";
3242 unsigned ValueCount = 0;
3243 bool IsFirst = true;
3245 // Convert over all the output constraints.
3246 for (InlineAsm::ConstraintInfoVector::iterator I = Constraints.begin(),
3247 E = Constraints.end(); I != E; ++I) {
3249 if (I->Type != InlineAsm::isOutput) {
3251 continue; // Ignore non-output constraints.
3254 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3255 std::string C = InterpretASMConstraint(*I);
3256 if (C.empty()) continue;
3267 if (ValueCount < ResultVals.size()) {
3268 DestVal = ResultVals[ValueCount].first;
3269 DestValNo = ResultVals[ValueCount].second;
3271 DestVal = CI.getArgOperand(ValueCount-ResultVals.size());
3273 if (I->isEarlyClobber)
3276 Out << "\"=" << C << "\"(" << GetValueName(DestVal);
3277 if (DestValNo != -1)
3278 Out << ".field" << DestValNo; // Multiple retvals.
3284 // Convert over all the input constraints.
3288 for (InlineAsm::ConstraintInfoVector::iterator I = Constraints.begin(),
3289 E = Constraints.end(); I != E; ++I) {
3290 if (I->Type != InlineAsm::isInput) {
3292 continue; // Ignore non-input constraints.
3295 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3296 std::string C = InterpretASMConstraint(*I);
3297 if (C.empty()) continue;
3304 assert(ValueCount >= ResultVals.size() && "Input can't refer to result");
3305 Value *SrcVal = CI.getArgOperand(ValueCount-ResultVals.size());
3307 Out << "\"" << C << "\"(";
3309 writeOperand(SrcVal);
3311 writeOperandDeref(SrcVal);
3315 // Convert over the clobber constraints.
3317 for (InlineAsm::ConstraintInfoVector::iterator I = Constraints.begin(),
3318 E = Constraints.end(); I != E; ++I) {
3319 if (I->Type != InlineAsm::isClobber)
3320 continue; // Ignore non-input constraints.
3322 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3323 std::string C = InterpretASMConstraint(*I);
3324 if (C.empty()) continue;
3331 Out << '\"' << C << '"';
3337 void CWriter::visitAllocaInst(AllocaInst &I) {
3339 printType(Out, I.getType());
3340 Out << ") alloca(sizeof(";
3341 printType(Out, I.getType()->getElementType());
3343 if (I.isArrayAllocation()) {
3345 writeOperand(I.getOperand(0));
3350 void CWriter::printGEPExpression(Value *Ptr, gep_type_iterator I,
3351 gep_type_iterator E, bool Static) {
3353 // If there are no indices, just print out the pointer.
3359 // Find out if the last index is into a vector. If so, we have to print this
3360 // specially. Since vectors can't have elements of indexable type, only the
3361 // last index could possibly be of a vector element.
3362 VectorType *LastIndexIsVector = 0;
3364 for (gep_type_iterator TmpI = I; TmpI != E; ++TmpI)
3365 LastIndexIsVector = dyn_cast<VectorType>(*TmpI);
3370 // If the last index is into a vector, we can't print it as &a[i][j] because
3371 // we can't index into a vector with j in GCC. Instead, emit this as
3372 // (((float*)&a[i])+j)
3373 if (LastIndexIsVector) {
3375 printType(Out, PointerType::getUnqual(LastIndexIsVector->getElementType()));
3381 // If the first index is 0 (very typical) we can do a number of
3382 // simplifications to clean up the code.
3383 Value *FirstOp = I.getOperand();
3384 if (!isa<Constant>(FirstOp) || !cast<Constant>(FirstOp)->isNullValue()) {
3385 // First index isn't simple, print it the hard way.
3388 ++I; // Skip the zero index.
3390 // Okay, emit the first operand. If Ptr is something that is already address
3391 // exposed, like a global, avoid emitting (&foo)[0], just emit foo instead.
3392 if (isAddressExposed(Ptr)) {
3393 writeOperandInternal(Ptr, Static);
3394 } else if (I != E && (*I)->isStructTy()) {
3395 // If we didn't already emit the first operand, see if we can print it as
3396 // P->f instead of "P[0].f"
3398 Out << "->field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3399 ++I; // eat the struct index as well.
3401 // Instead of emitting P[0][1], emit (*P)[1], which is more idiomatic.
3408 for (; I != E; ++I) {
3409 if ((*I)->isStructTy()) {
3410 Out << ".field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3411 } else if ((*I)->isArrayTy()) {
3413 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3415 } else if (!(*I)->isVectorTy()) {
3417 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3420 // If the last index is into a vector, then print it out as "+j)". This
3421 // works with the 'LastIndexIsVector' code above.
3422 if (isa<Constant>(I.getOperand()) &&
3423 cast<Constant>(I.getOperand())->isNullValue()) {
3424 Out << "))"; // avoid "+0".
3427 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3435 void CWriter::writeMemoryAccess(Value *Operand, Type *OperandType,
3436 bool IsVolatile, unsigned Alignment) {
3438 bool IsUnaligned = Alignment &&
3439 Alignment < TD->getABITypeAlignment(OperandType);
3443 if (IsVolatile || IsUnaligned) {
3446 Out << "struct __attribute__ ((packed, aligned(" << Alignment << "))) {";
3447 printType(Out, OperandType, false, IsUnaligned ? "data" : "volatile*");
3450 if (IsVolatile) Out << "volatile ";
3456 writeOperand(Operand);
3458 if (IsVolatile || IsUnaligned) {
3465 void CWriter::visitLoadInst(LoadInst &I) {
3466 writeMemoryAccess(I.getOperand(0), I.getType(), I.isVolatile(),
3471 void CWriter::visitStoreInst(StoreInst &I) {
3472 writeMemoryAccess(I.getPointerOperand(), I.getOperand(0)->getType(),
3473 I.isVolatile(), I.getAlignment());
3475 Value *Operand = I.getOperand(0);
3476 Constant *BitMask = 0;
3477 if (IntegerType* ITy = dyn_cast<IntegerType>(Operand->getType()))
3478 if (!ITy->isPowerOf2ByteWidth())
3479 // We have a bit width that doesn't match an even power-of-2 byte
3480 // size. Consequently we must & the value with the type's bit mask
3481 BitMask = ConstantInt::get(ITy, ITy->getBitMask());
3484 writeOperand(Operand);
3487 printConstant(BitMask, false);
3492 void CWriter::visitGetElementPtrInst(GetElementPtrInst &I) {
3493 printGEPExpression(I.getPointerOperand(), gep_type_begin(I),
3494 gep_type_end(I), false);
3497 void CWriter::visitVAArgInst(VAArgInst &I) {
3498 Out << "va_arg(*(va_list*)";
3499 writeOperand(I.getOperand(0));
3501 printType(Out, I.getType());
3505 void CWriter::visitInsertElementInst(InsertElementInst &I) {
3506 Type *EltTy = I.getType()->getElementType();
3507 writeOperand(I.getOperand(0));
3510 printType(Out, PointerType::getUnqual(EltTy));
3511 Out << ")(&" << GetValueName(&I) << "))[";
3512 writeOperand(I.getOperand(2));
3514 writeOperand(I.getOperand(1));
3518 void CWriter::visitExtractElementInst(ExtractElementInst &I) {
3519 // We know that our operand is not inlined.
3522 cast<VectorType>(I.getOperand(0)->getType())->getElementType();
3523 printType(Out, PointerType::getUnqual(EltTy));
3524 Out << ")(&" << GetValueName(I.getOperand(0)) << "))[";
3525 writeOperand(I.getOperand(1));
3529 void CWriter::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
3531 printType(Out, SVI.getType());
3533 VectorType *VT = SVI.getType();
3534 unsigned NumElts = VT->getNumElements();
3535 Type *EltTy = VT->getElementType();
3537 for (unsigned i = 0; i != NumElts; ++i) {
3539 int SrcVal = SVI.getMaskValue(i);
3540 if ((unsigned)SrcVal >= NumElts*2) {
3541 Out << " 0/*undef*/ ";
3543 Value *Op = SVI.getOperand((unsigned)SrcVal >= NumElts);
3544 if (isa<Instruction>(Op)) {
3545 // Do an extractelement of this value from the appropriate input.
3547 printType(Out, PointerType::getUnqual(EltTy));
3548 Out << ")(&" << GetValueName(Op)
3549 << "))[" << (SrcVal & (NumElts-1)) << "]";
3550 } else if (isa<ConstantAggregateZero>(Op) || isa<UndefValue>(Op)) {
3553 printConstant(cast<ConstantVector>(Op)->getOperand(SrcVal &
3562 void CWriter::visitInsertValueInst(InsertValueInst &IVI) {
3563 // Start by copying the entire aggregate value into the result variable.
3564 writeOperand(IVI.getOperand(0));
3567 // Then do the insert to update the field.
3568 Out << GetValueName(&IVI);
3569 for (const unsigned *b = IVI.idx_begin(), *i = b, *e = IVI.idx_end();
3572 ExtractValueInst::getIndexedType(IVI.getOperand(0)->getType(),
3573 makeArrayRef(b, i+1));
3574 if (IndexedTy->isArrayTy())
3575 Out << ".array[" << *i << "]";
3577 Out << ".field" << *i;
3580 writeOperand(IVI.getOperand(1));
3583 void CWriter::visitExtractValueInst(ExtractValueInst &EVI) {
3585 if (isa<UndefValue>(EVI.getOperand(0))) {
3587 printType(Out, EVI.getType());
3588 Out << ") 0/*UNDEF*/";
3590 Out << GetValueName(EVI.getOperand(0));
3591 for (const unsigned *b = EVI.idx_begin(), *i = b, *e = EVI.idx_end();
3594 ExtractValueInst::getIndexedType(EVI.getOperand(0)->getType(),
3595 makeArrayRef(b, i+1));
3596 if (IndexedTy->isArrayTy())
3597 Out << ".array[" << *i << "]";
3599 Out << ".field" << *i;
3605 //===----------------------------------------------------------------------===//
3606 // External Interface declaration
3607 //===----------------------------------------------------------------------===//
3609 bool CTargetMachine::addPassesToEmitFile(PassManagerBase &PM,
3610 formatted_raw_ostream &o,
3611 CodeGenFileType FileType,
3612 CodeGenOpt::Level OptLevel,
3613 bool DisableVerify) {
3614 if (FileType != TargetMachine::CGFT_AssemblyFile) return true;
3616 PM.add(createGCLoweringPass());
3617 PM.add(createLowerInvokePass());
3618 PM.add(createCFGSimplificationPass()); // clean up after lower invoke.
3619 PM.add(new CWriter(o));
3620 PM.add(createGCInfoDeleter());