1 //===-- CBackend.cpp - Library for converting LLVM code to C --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file was developed by the LLVM research group and is distributed under
6 // the University of Illinois Open Source 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/ParameterAttributes.h"
22 #include "llvm/Pass.h"
23 #include "llvm/PassManager.h"
24 #include "llvm/TypeSymbolTable.h"
25 #include "llvm/Intrinsics.h"
26 #include "llvm/IntrinsicInst.h"
27 #include "llvm/InlineAsm.h"
28 #include "llvm/Analysis/ConstantsScanner.h"
29 #include "llvm/Analysis/FindUsedTypes.h"
30 #include "llvm/Analysis/LoopInfo.h"
31 #include "llvm/CodeGen/IntrinsicLowering.h"
32 #include "llvm/Transforms/Scalar.h"
33 #include "llvm/Target/TargetMachineRegistry.h"
34 #include "llvm/Target/TargetAsmInfo.h"
35 #include "llvm/Target/TargetData.h"
36 #include "llvm/Support/CallSite.h"
37 #include "llvm/Support/CFG.h"
38 #include "llvm/Support/GetElementPtrTypeIterator.h"
39 #include "llvm/Support/InstVisitor.h"
40 #include "llvm/Support/Mangler.h"
41 #include "llvm/Support/MathExtras.h"
42 #include "llvm/ADT/StringExtras.h"
43 #include "llvm/ADT/STLExtras.h"
44 #include "llvm/Support/MathExtras.h"
45 #include "llvm/Config/config.h"
51 // Register the target.
52 RegisterTarget<CTargetMachine> X("c", " C backend");
54 /// CBackendNameAllUsedStructsAndMergeFunctions - This pass inserts names for
55 /// any unnamed structure types that are used by the program, and merges
56 /// external functions with the same name.
58 class CBackendNameAllUsedStructsAndMergeFunctions : public ModulePass {
61 CBackendNameAllUsedStructsAndMergeFunctions()
62 : ModulePass((intptr_t)&ID) {}
63 void getAnalysisUsage(AnalysisUsage &AU) const {
64 AU.addRequired<FindUsedTypes>();
67 virtual const char *getPassName() const {
68 return "C backend type canonicalizer";
71 virtual bool runOnModule(Module &M);
74 char CBackendNameAllUsedStructsAndMergeFunctions::ID = 0;
76 /// CWriter - This class is the main chunk of code that converts an LLVM
77 /// module to a C translation unit.
78 class CWriter : public FunctionPass, public InstVisitor<CWriter> {
80 IntrinsicLowering *IL;
83 const Module *TheModule;
84 const TargetAsmInfo* TAsm;
86 std::map<const Type *, std::string> TypeNames;
87 std::map<const ConstantFP *, unsigned> FPConstantMap;
88 std::set<Function*> intrinsicPrototypesAlreadyGenerated;
92 CWriter(std::ostream &o)
93 : FunctionPass((intptr_t)&ID), Out(o), IL(0), Mang(0), LI(0),
94 TheModule(0), TAsm(0), TD(0) {}
96 virtual const char *getPassName() const { return "C backend"; }
98 void getAnalysisUsage(AnalysisUsage &AU) const {
99 AU.addRequired<LoopInfo>();
100 AU.setPreservesAll();
103 virtual bool doInitialization(Module &M);
105 bool runOnFunction(Function &F) {
106 LI = &getAnalysis<LoopInfo>();
108 // Get rid of intrinsics we can't handle.
111 // Output all floating point constants that cannot be printed accurately.
112 printFloatingPointConstants(F);
115 FPConstantMap.clear();
119 virtual bool doFinalization(Module &M) {
126 std::ostream &printType(std::ostream &Out, const Type *Ty,
127 bool isSigned = false,
128 const std::string &VariableName = "",
129 bool IgnoreName = false);
130 std::ostream &printSimpleType(std::ostream &Out, const Type *Ty,
132 const std::string &NameSoFar = "");
134 void printStructReturnPointerFunctionType(std::ostream &Out,
135 const PointerType *Ty);
137 void writeOperand(Value *Operand);
138 void writeOperandRaw(Value *Operand);
139 void writeOperandInternal(Value *Operand);
140 void writeOperandWithCast(Value* Operand, unsigned Opcode);
141 void writeOperandWithCast(Value* Operand, ICmpInst::Predicate predicate);
142 bool writeInstructionCast(const Instruction &I);
145 std::string InterpretASMConstraint(InlineAsm::ConstraintInfo& c);
147 void lowerIntrinsics(Function &F);
149 void printModule(Module *M);
150 void printModuleTypes(const TypeSymbolTable &ST);
151 void printContainedStructs(const Type *Ty, std::set<const StructType *> &);
152 void printFloatingPointConstants(Function &F);
153 void printFunctionSignature(const Function *F, bool Prototype);
155 void printFunction(Function &);
156 void printBasicBlock(BasicBlock *BB);
157 void printLoop(Loop *L);
159 void printCast(unsigned opcode, const Type *SrcTy, const Type *DstTy);
160 void printConstant(Constant *CPV);
161 void printConstantWithCast(Constant *CPV, unsigned Opcode);
162 bool printConstExprCast(const ConstantExpr *CE);
163 void printConstantArray(ConstantArray *CPA);
164 void printConstantVector(ConstantVector *CP);
166 // isInlinableInst - Attempt to inline instructions into their uses to build
167 // trees as much as possible. To do this, we have to consistently decide
168 // what is acceptable to inline, so that variable declarations don't get
169 // printed and an extra copy of the expr is not emitted.
171 static bool isInlinableInst(const Instruction &I) {
172 // Always inline cmp instructions, even if they are shared by multiple
173 // expressions. GCC generates horrible code if we don't.
177 // Must be an expression, must be used exactly once. If it is dead, we
178 // emit it inline where it would go.
179 if (I.getType() == Type::VoidTy || !I.hasOneUse() ||
180 isa<TerminatorInst>(I) || isa<CallInst>(I) || isa<PHINode>(I) ||
181 isa<LoadInst>(I) || isa<VAArgInst>(I))
182 // Don't inline a load across a store or other bad things!
185 // Must not be used in inline asm
186 if (I.hasOneUse() && isInlineAsm(*I.use_back())) return false;
188 // Only inline instruction it if it's use is in the same BB as the inst.
189 return I.getParent() == cast<Instruction>(I.use_back())->getParent();
192 // isDirectAlloca - Define fixed sized allocas in the entry block as direct
193 // variables which are accessed with the & operator. This causes GCC to
194 // generate significantly better code than to emit alloca calls directly.
196 static const AllocaInst *isDirectAlloca(const Value *V) {
197 const AllocaInst *AI = dyn_cast<AllocaInst>(V);
198 if (!AI) return false;
199 if (AI->isArrayAllocation())
200 return 0; // FIXME: we can also inline fixed size array allocas!
201 if (AI->getParent() != &AI->getParent()->getParent()->getEntryBlock())
206 // isInlineAsm - Check if the instruction is a call to an inline asm chunk
207 static bool isInlineAsm(const Instruction& I) {
208 if (isa<CallInst>(&I) && isa<InlineAsm>(I.getOperand(0)))
213 // Instruction visitation functions
214 friend class InstVisitor<CWriter>;
216 void visitReturnInst(ReturnInst &I);
217 void visitBranchInst(BranchInst &I);
218 void visitSwitchInst(SwitchInst &I);
219 void visitInvokeInst(InvokeInst &I) {
220 assert(0 && "Lowerinvoke pass didn't work!");
223 void visitUnwindInst(UnwindInst &I) {
224 assert(0 && "Lowerinvoke pass didn't work!");
226 void visitUnreachableInst(UnreachableInst &I);
228 void visitPHINode(PHINode &I);
229 void visitBinaryOperator(Instruction &I);
230 void visitICmpInst(ICmpInst &I);
231 void visitFCmpInst(FCmpInst &I);
233 void visitCastInst (CastInst &I);
234 void visitSelectInst(SelectInst &I);
235 void visitCallInst (CallInst &I);
236 void visitInlineAsm(CallInst &I);
238 void visitMallocInst(MallocInst &I);
239 void visitAllocaInst(AllocaInst &I);
240 void visitFreeInst (FreeInst &I);
241 void visitLoadInst (LoadInst &I);
242 void visitStoreInst (StoreInst &I);
243 void visitGetElementPtrInst(GetElementPtrInst &I);
244 void visitVAArgInst (VAArgInst &I);
246 void visitInstruction(Instruction &I) {
247 cerr << "C Writer does not know about " << I;
251 void outputLValue(Instruction *I) {
252 Out << " " << GetValueName(I) << " = ";
255 bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To);
256 void printPHICopiesForSuccessor(BasicBlock *CurBlock,
257 BasicBlock *Successor, unsigned Indent);
258 void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
260 void printIndexingExpression(Value *Ptr, gep_type_iterator I,
261 gep_type_iterator E);
263 std::string GetValueName(const Value *Operand);
267 char CWriter::ID = 0;
269 /// This method inserts names for any unnamed structure types that are used by
270 /// the program, and removes names from structure types that are not used by the
273 bool CBackendNameAllUsedStructsAndMergeFunctions::runOnModule(Module &M) {
274 // Get a set of types that are used by the program...
275 std::set<const Type *> UT = getAnalysis<FindUsedTypes>().getTypes();
277 // Loop over the module symbol table, removing types from UT that are
278 // already named, and removing names for types that are not used.
280 TypeSymbolTable &TST = M.getTypeSymbolTable();
281 for (TypeSymbolTable::iterator TI = TST.begin(), TE = TST.end();
283 TypeSymbolTable::iterator I = TI++;
285 // If this isn't a struct type, remove it from our set of types to name.
286 // This simplifies emission later.
287 if (!isa<StructType>(I->second) && !isa<OpaqueType>(I->second)) {
290 // If this is not used, remove it from the symbol table.
291 std::set<const Type *>::iterator UTI = UT.find(I->second);
295 UT.erase(UTI); // Only keep one name for this type.
299 // UT now contains types that are not named. Loop over it, naming
302 bool Changed = false;
303 unsigned RenameCounter = 0;
304 for (std::set<const Type *>::const_iterator I = UT.begin(), E = UT.end();
306 if (const StructType *ST = dyn_cast<StructType>(*I)) {
307 while (M.addTypeName("unnamed"+utostr(RenameCounter), ST))
313 // Loop over all external functions and globals. If we have two with
314 // identical names, merge them.
315 // FIXME: This code should disappear when we don't allow values with the same
316 // names when they have different types!
317 std::map<std::string, GlobalValue*> ExtSymbols;
318 for (Module::iterator I = M.begin(), E = M.end(); I != E;) {
320 if (GV->isDeclaration() && GV->hasName()) {
321 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
322 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
324 // Found a conflict, replace this global with the previous one.
325 GlobalValue *OldGV = X.first->second;
326 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
327 GV->eraseFromParent();
332 // Do the same for globals.
333 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
335 GlobalVariable *GV = I++;
336 if (GV->isDeclaration() && GV->hasName()) {
337 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
338 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
340 // Found a conflict, replace this global with the previous one.
341 GlobalValue *OldGV = X.first->second;
342 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
343 GV->eraseFromParent();
352 /// printStructReturnPointerFunctionType - This is like printType for a struct
353 /// return type, except, instead of printing the type as void (*)(Struct*, ...)
354 /// print it as "Struct (*)(...)", for struct return functions.
355 void CWriter::printStructReturnPointerFunctionType(std::ostream &Out,
356 const PointerType *TheTy) {
357 const FunctionType *FTy = cast<FunctionType>(TheTy->getElementType());
358 std::stringstream FunctionInnards;
359 FunctionInnards << " (*) (";
360 bool PrintedType = false;
362 FunctionType::param_iterator I = FTy->param_begin(), E = FTy->param_end();
363 const Type *RetTy = cast<PointerType>(I->get())->getElementType();
365 const ParamAttrsList *Attrs = FTy->getParamAttrs();
366 for (++I; I != E; ++I) {
368 FunctionInnards << ", ";
369 printType(FunctionInnards, *I,
370 /*isSigned=*/Attrs && Attrs->paramHasAttr(Idx, ParamAttr::SExt), "");
373 if (FTy->isVarArg()) {
375 FunctionInnards << ", ...";
376 } else if (!PrintedType) {
377 FunctionInnards << "void";
379 FunctionInnards << ')';
380 std::string tstr = FunctionInnards.str();
381 printType(Out, RetTy,
382 /*isSigned=*/Attrs && Attrs->paramHasAttr(0, ParamAttr::SExt), tstr);
386 CWriter::printSimpleType(std::ostream &Out, const Type *Ty, bool isSigned,
387 const std::string &NameSoFar) {
388 assert((Ty->isPrimitiveType() || Ty->isInteger()) &&
389 "Invalid type for printSimpleType");
390 switch (Ty->getTypeID()) {
391 case Type::VoidTyID: return Out << "void " << NameSoFar;
392 case Type::IntegerTyID: {
393 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
395 return Out << "bool " << NameSoFar;
396 else if (NumBits <= 8)
397 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
398 else if (NumBits <= 16)
399 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
400 else if (NumBits <= 32)
401 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
403 assert(NumBits <= 64 && "Bit widths > 64 not implemented yet");
404 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
407 case Type::FloatTyID: return Out << "float " << NameSoFar;
408 case Type::DoubleTyID: return Out << "double " << NameSoFar;
410 cerr << "Unknown primitive type: " << *Ty << "\n";
415 #define IMPL_SIGN_EXTENSION(OpTy, Func) { \
416 const IntegerType* IntTy = cast<IntegerType>(OpTy); \
417 unsigned BitWidth = IntTy->getBitWidth(); \
418 if (BitWidth != 8 && BitWidth != 16 && BitWidth != 32 && \
419 BitWidth != 64 && BitWidth != 128) { \
420 const char * Suffix; \
427 Out << " & (1" << Suffix << " << " << BitWidth - 1 << " ) ? "; \
429 Out << " | " << (~IntTy->getBitMask()) << Suffix << " : "; \
431 Out << " & " << IntTy->getBitMask() << Suffix; \
438 // Pass the Type* and the variable name and this prints out the variable
441 std::ostream &CWriter::printType(std::ostream &Out, const Type *Ty,
442 bool isSigned, const std::string &NameSoFar,
444 if (Ty->isPrimitiveType() || Ty->isInteger()) {
445 printSimpleType(Out, Ty, isSigned, NameSoFar);
449 // Check to see if the type is named.
450 if (!IgnoreName || isa<OpaqueType>(Ty)) {
451 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
452 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
455 switch (Ty->getTypeID()) {
456 case Type::FunctionTyID: {
457 const FunctionType *FTy = cast<FunctionType>(Ty);
458 std::stringstream FunctionInnards;
459 FunctionInnards << " (" << NameSoFar << ") (";
460 const ParamAttrsList *Attrs = FTy->getParamAttrs();
462 for (FunctionType::param_iterator I = FTy->param_begin(),
463 E = FTy->param_end(); I != E; ++I) {
464 if (I != FTy->param_begin())
465 FunctionInnards << ", ";
466 printType(FunctionInnards, *I,
467 /*isSigned=*/Attrs && Attrs->paramHasAttr(Idx, ParamAttr::SExt), "");
470 if (FTy->isVarArg()) {
471 if (FTy->getNumParams())
472 FunctionInnards << ", ...";
473 } else if (!FTy->getNumParams()) {
474 FunctionInnards << "void";
476 FunctionInnards << ')';
477 std::string tstr = FunctionInnards.str();
478 printType(Out, FTy->getReturnType(),
479 /*isSigned=*/Attrs && Attrs->paramHasAttr(0, ParamAttr::SExt), tstr);
482 case Type::StructTyID: {
483 const StructType *STy = cast<StructType>(Ty);
484 Out << NameSoFar + " {\n";
486 for (StructType::element_iterator I = STy->element_begin(),
487 E = STy->element_end(); I != E; ++I) {
489 printType(Out, *I, false, "field" + utostr(Idx++));
495 case Type::PointerTyID: {
496 const PointerType *PTy = cast<PointerType>(Ty);
497 std::string ptrName = "*" + NameSoFar;
499 if (isa<ArrayType>(PTy->getElementType()) ||
500 isa<VectorType>(PTy->getElementType()))
501 ptrName = "(" + ptrName + ")";
503 return printType(Out, PTy->getElementType(), false, ptrName);
506 case Type::ArrayTyID: {
507 const ArrayType *ATy = cast<ArrayType>(Ty);
508 unsigned NumElements = ATy->getNumElements();
509 if (NumElements == 0) NumElements = 1;
510 return printType(Out, ATy->getElementType(), false,
511 NameSoFar + "[" + utostr(NumElements) + "]");
514 case Type::VectorTyID: {
515 const VectorType *PTy = cast<VectorType>(Ty);
516 unsigned NumElements = PTy->getNumElements();
517 if (NumElements == 0) NumElements = 1;
518 return printType(Out, PTy->getElementType(), false,
519 NameSoFar + "[" + utostr(NumElements) + "]");
522 case Type::OpaqueTyID: {
523 static int Count = 0;
524 std::string TyName = "struct opaque_" + itostr(Count++);
525 assert(TypeNames.find(Ty) == TypeNames.end());
526 TypeNames[Ty] = TyName;
527 return Out << TyName << ' ' << NameSoFar;
530 assert(0 && "Unhandled case in getTypeProps!");
537 void CWriter::printConstantArray(ConstantArray *CPA) {
539 // As a special case, print the array as a string if it is an array of
540 // ubytes or an array of sbytes with positive values.
542 const Type *ETy = CPA->getType()->getElementType();
543 bool isString = (ETy == Type::Int8Ty || ETy == Type::Int8Ty);
545 // Make sure the last character is a null char, as automatically added by C
546 if (isString && (CPA->getNumOperands() == 0 ||
547 !cast<Constant>(*(CPA->op_end()-1))->isNullValue()))
552 // Keep track of whether the last number was a hexadecimal escape
553 bool LastWasHex = false;
555 // Do not include the last character, which we know is null
556 for (unsigned i = 0, e = CPA->getNumOperands()-1; i != e; ++i) {
557 unsigned char C = cast<ConstantInt>(CPA->getOperand(i))->getZExtValue();
559 // Print it out literally if it is a printable character. The only thing
560 // to be careful about is when the last letter output was a hex escape
561 // code, in which case we have to be careful not to print out hex digits
562 // explicitly (the C compiler thinks it is a continuation of the previous
563 // character, sheesh...)
565 if (isprint(C) && (!LastWasHex || !isxdigit(C))) {
567 if (C == '"' || C == '\\')
574 case '\n': Out << "\\n"; break;
575 case '\t': Out << "\\t"; break;
576 case '\r': Out << "\\r"; break;
577 case '\v': Out << "\\v"; break;
578 case '\a': Out << "\\a"; break;
579 case '\"': Out << "\\\""; break;
580 case '\'': Out << "\\\'"; break;
583 Out << (char)(( C/16 < 10) ? ( C/16 +'0') : ( C/16 -10+'A'));
584 Out << (char)(((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A'));
593 if (CPA->getNumOperands()) {
595 printConstant(cast<Constant>(CPA->getOperand(0)));
596 for (unsigned i = 1, e = CPA->getNumOperands(); i != e; ++i) {
598 printConstant(cast<Constant>(CPA->getOperand(i)));
605 void CWriter::printConstantVector(ConstantVector *CP) {
607 if (CP->getNumOperands()) {
609 printConstant(cast<Constant>(CP->getOperand(0)));
610 for (unsigned i = 1, e = CP->getNumOperands(); i != e; ++i) {
612 printConstant(cast<Constant>(CP->getOperand(i)));
618 // isFPCSafeToPrint - Returns true if we may assume that CFP may be written out
619 // textually as a double (rather than as a reference to a stack-allocated
620 // variable). We decide this by converting CFP to a string and back into a
621 // double, and then checking whether the conversion results in a bit-equal
622 // double to the original value of CFP. This depends on us and the target C
623 // compiler agreeing on the conversion process (which is pretty likely since we
624 // only deal in IEEE FP).
626 static bool isFPCSafeToPrint(const ConstantFP *CFP) {
627 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
629 sprintf(Buffer, "%a", CFP->getValue());
631 if (!strncmp(Buffer, "0x", 2) ||
632 !strncmp(Buffer, "-0x", 3) ||
633 !strncmp(Buffer, "+0x", 3))
634 return atof(Buffer) == CFP->getValue();
637 std::string StrVal = ftostr(CFP->getValue());
639 while (StrVal[0] == ' ')
640 StrVal.erase(StrVal.begin());
642 // Check to make sure that the stringized number is not some string like "Inf"
643 // or NaN. Check that the string matches the "[-+]?[0-9]" regex.
644 if ((StrVal[0] >= '0' && StrVal[0] <= '9') ||
645 ((StrVal[0] == '-' || StrVal[0] == '+') &&
646 (StrVal[1] >= '0' && StrVal[1] <= '9')))
647 // Reparse stringized version!
648 return atof(StrVal.c_str()) == CFP->getValue();
653 /// Print out the casting for a cast operation. This does the double casting
654 /// necessary for conversion to the destination type, if necessary.
655 /// @brief Print a cast
656 void CWriter::printCast(unsigned opc, const Type *SrcTy, const Type *DstTy) {
657 // Print the destination type cast
659 case Instruction::UIToFP:
660 case Instruction::SIToFP:
661 case Instruction::IntToPtr:
662 case Instruction::Trunc:
663 case Instruction::BitCast:
664 case Instruction::FPExt:
665 case Instruction::FPTrunc: // For these the DstTy sign doesn't matter
667 printType(Out, DstTy);
670 case Instruction::ZExt:
671 case Instruction::PtrToInt:
672 case Instruction::FPToUI: // For these, make sure we get an unsigned dest
674 printSimpleType(Out, DstTy, false);
677 case Instruction::SExt:
678 case Instruction::FPToSI: // For these, make sure we get a signed dest
680 printSimpleType(Out, DstTy, true);
684 assert(0 && "Invalid cast opcode");
687 // Print the source type cast
689 case Instruction::UIToFP:
690 case Instruction::ZExt:
692 printSimpleType(Out, SrcTy, false);
695 case Instruction::SIToFP:
696 case Instruction::SExt:
698 printSimpleType(Out, SrcTy, true);
701 case Instruction::IntToPtr:
702 case Instruction::PtrToInt:
703 // Avoid "cast to pointer from integer of different size" warnings
704 Out << "(unsigned long)";
706 case Instruction::Trunc:
707 case Instruction::BitCast:
708 case Instruction::FPExt:
709 case Instruction::FPTrunc:
710 case Instruction::FPToSI:
711 case Instruction::FPToUI:
712 break; // These don't need a source cast.
714 assert(0 && "Invalid cast opcode");
719 // printConstant - The LLVM Constant to C Constant converter.
720 void CWriter::printConstant(Constant *CPV) {
721 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
722 switch (CE->getOpcode()) {
723 case Instruction::Trunc:
724 case Instruction::ZExt:
725 case Instruction::SExt:
726 case Instruction::FPTrunc:
727 case Instruction::FPExt:
728 case Instruction::UIToFP:
729 case Instruction::SIToFP:
730 case Instruction::FPToUI:
731 case Instruction::FPToSI:
732 case Instruction::PtrToInt:
733 case Instruction::IntToPtr:
734 case Instruction::BitCast:
736 printCast(CE->getOpcode(), CE->getOperand(0)->getType(), CE->getType());
737 if (CE->getOpcode() == Instruction::Trunc ||
738 CE->getOpcode() == Instruction::FPToUI ||
739 CE->getOpcode() == Instruction::FPToSI ||
740 CE->getOpcode() == Instruction::PtrToInt) {
741 if (const IntegerType* IntTy = dyn_cast<IntegerType>(CE->getType())) {
742 uint64_t BitMask = IntTy->getBitMask();
743 printConstant(CE->getOperand(0));
744 Out << "&" << BitMask << (IntTy->getBitWidth() <=32 ? "U": "ULL");
747 else if (CE->getOpcode() == Instruction::SExt &&
748 CE->getOperand(0)->getType() == Type::Int1Ty) {
749 // Make sure we really sext from bool here by subtracting from 0
751 printConstant(CE->getOperand(0));
753 else if (CE->getOpcode() == Instruction::SExt &&
754 CE->getOperand(0)->getType()->getTypeID() == Type::IntegerTyID) {
755 IMPL_SIGN_EXTENSION(CE->getOperand(0)->getType(),
756 printConstant(CE->getOperand(0)));
758 else if (CE->getOpcode() == Instruction::ZExt &&
759 CE->getOperand(0)->getType()->getTypeID() == Type::IntegerTyID){
760 const IntegerType* IntTy =
761 cast<IntegerType>(CE->getOperand(0)->getType());
762 uint64_t BitMask = IntTy->getBitMask();
763 writeOperand(CE->getOperand(0));
764 Out << "&" << BitMask << (IntTy->getBitWidth() <=32 ? "U": "ULL");
767 printConstant(CE->getOperand(0));
770 case Instruction::GetElementPtr:
772 printIndexingExpression(CE->getOperand(0), gep_type_begin(CPV),
776 case Instruction::Select:
778 printConstant(CE->getOperand(0));
780 printConstant(CE->getOperand(1));
782 printConstant(CE->getOperand(2));
785 case Instruction::Add:
786 case Instruction::Sub:
787 case Instruction::Mul:
788 case Instruction::SDiv:
789 case Instruction::UDiv:
790 case Instruction::FDiv:
791 case Instruction::URem:
792 case Instruction::SRem:
793 case Instruction::FRem:
794 case Instruction::And:
795 case Instruction::Or:
796 case Instruction::Xor:
797 case Instruction::ICmp:
798 case Instruction::Shl:
799 case Instruction::LShr:
800 case Instruction::AShr:
803 bool NeedsClosingParens = printConstExprCast(CE);
804 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
805 switch (CE->getOpcode()) {
806 case Instruction::Add: Out << " + "; break;
807 case Instruction::Sub: Out << " - "; break;
808 case Instruction::Mul: Out << " * "; break;
809 case Instruction::URem:
810 case Instruction::SRem:
811 case Instruction::FRem: Out << " % "; break;
812 case Instruction::UDiv:
813 case Instruction::SDiv:
814 case Instruction::FDiv: Out << " / "; break;
815 case Instruction::And: Out << " & "; break;
816 case Instruction::Or: Out << " | "; break;
817 case Instruction::Xor: Out << " ^ "; break;
818 case Instruction::Shl: Out << " << "; break;
819 case Instruction::LShr:
820 case Instruction::AShr: Out << " >> "; break;
821 case Instruction::ICmp:
822 switch (CE->getPredicate()) {
823 case ICmpInst::ICMP_EQ: Out << " == "; break;
824 case ICmpInst::ICMP_NE: Out << " != "; break;
825 case ICmpInst::ICMP_SLT:
826 case ICmpInst::ICMP_ULT: Out << " < "; break;
827 case ICmpInst::ICMP_SLE:
828 case ICmpInst::ICMP_ULE: Out << " <= "; break;
829 case ICmpInst::ICMP_SGT:
830 case ICmpInst::ICMP_UGT: Out << " > "; break;
831 case ICmpInst::ICMP_SGE:
832 case ICmpInst::ICMP_UGE: Out << " >= "; break;
833 default: assert(0 && "Illegal ICmp predicate");
836 default: assert(0 && "Illegal opcode here!");
838 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
839 if (NeedsClosingParens)
844 case Instruction::FCmp: {
846 bool NeedsClosingParens = printConstExprCast(CE);
847 if (CE->getPredicate() == FCmpInst::FCMP_FALSE)
849 else if (CE->getPredicate() == FCmpInst::FCMP_TRUE)
853 switch (CE->getPredicate()) {
854 default: assert(0 && "Illegal FCmp predicate");
855 case FCmpInst::FCMP_ORD: op = "ord"; break;
856 case FCmpInst::FCMP_UNO: op = "uno"; break;
857 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
858 case FCmpInst::FCMP_UNE: op = "une"; break;
859 case FCmpInst::FCMP_ULT: op = "ult"; break;
860 case FCmpInst::FCMP_ULE: op = "ule"; break;
861 case FCmpInst::FCMP_UGT: op = "ugt"; break;
862 case FCmpInst::FCMP_UGE: op = "uge"; break;
863 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
864 case FCmpInst::FCMP_ONE: op = "one"; break;
865 case FCmpInst::FCMP_OLT: op = "olt"; break;
866 case FCmpInst::FCMP_OLE: op = "ole"; break;
867 case FCmpInst::FCMP_OGT: op = "ogt"; break;
868 case FCmpInst::FCMP_OGE: op = "oge"; break;
870 Out << "llvm_fcmp_" << op << "(";
871 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
873 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
876 if (NeedsClosingParens)
881 cerr << "CWriter Error: Unhandled constant expression: "
885 } else if (isa<UndefValue>(CPV) && CPV->getType()->isFirstClassType()) {
887 printType(Out, CPV->getType()); // sign doesn't matter
888 Out << ")/*UNDEF*/0)";
892 if (ConstantInt *CI = dyn_cast<ConstantInt>(CPV)) {
893 const Type* Ty = CI->getType();
894 if (Ty == Type::Int1Ty)
895 Out << (CI->getZExtValue() ? '1' : '0') ;
898 printSimpleType(Out, Ty, false) << ')';
899 if (CI->isMinValue(true))
900 Out << CI->getZExtValue() << 'u';
902 Out << CI->getSExtValue();
903 if (Ty->getPrimitiveSizeInBits() > 32)
910 switch (CPV->getType()->getTypeID()) {
911 case Type::FloatTyID:
912 case Type::DoubleTyID: {
913 ConstantFP *FPC = cast<ConstantFP>(CPV);
914 std::map<const ConstantFP*, unsigned>::iterator I = FPConstantMap.find(FPC);
915 if (I != FPConstantMap.end()) {
916 // Because of FP precision problems we must load from a stack allocated
917 // value that holds the value in hex.
918 Out << "(*(" << (FPC->getType() == Type::FloatTy ? "float" : "double")
919 << "*)&FPConstant" << I->second << ')';
921 if (IsNAN(FPC->getValue())) {
924 // The prefix for a quiet NaN is 0x7FF8. For a signalling NaN,
926 const unsigned long QuietNaN = 0x7ff8UL;
927 //const unsigned long SignalNaN = 0x7ff4UL;
929 // We need to grab the first part of the FP #
932 uint64_t ll = DoubleToBits(FPC->getValue());
933 sprintf(Buffer, "0x%llx", static_cast<long long>(ll));
935 std::string Num(&Buffer[0], &Buffer[6]);
936 unsigned long Val = strtoul(Num.c_str(), 0, 16);
938 if (FPC->getType() == Type::FloatTy)
939 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "F(\""
940 << Buffer << "\") /*nan*/ ";
942 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "(\""
943 << Buffer << "\") /*nan*/ ";
944 } else if (IsInf(FPC->getValue())) {
946 if (FPC->getValue() < 0) Out << '-';
947 Out << "LLVM_INF" << (FPC->getType() == Type::FloatTy ? "F" : "")
951 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
952 // Print out the constant as a floating point number.
954 sprintf(Buffer, "%a", FPC->getValue());
957 Num = ftostr(FPC->getValue());
965 case Type::ArrayTyID:
966 if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
967 const ArrayType *AT = cast<ArrayType>(CPV->getType());
969 if (AT->getNumElements()) {
971 Constant *CZ = Constant::getNullValue(AT->getElementType());
973 for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
980 printConstantArray(cast<ConstantArray>(CPV));
984 case Type::VectorTyID:
985 if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
986 const VectorType *AT = cast<VectorType>(CPV->getType());
988 if (AT->getNumElements()) {
990 Constant *CZ = Constant::getNullValue(AT->getElementType());
992 for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
999 printConstantVector(cast<ConstantVector>(CPV));
1003 case Type::StructTyID:
1004 if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
1005 const StructType *ST = cast<StructType>(CPV->getType());
1007 if (ST->getNumElements()) {
1009 printConstant(Constant::getNullValue(ST->getElementType(0)));
1010 for (unsigned i = 1, e = ST->getNumElements(); i != e; ++i) {
1012 printConstant(Constant::getNullValue(ST->getElementType(i)));
1018 if (CPV->getNumOperands()) {
1020 printConstant(cast<Constant>(CPV->getOperand(0)));
1021 for (unsigned i = 1, e = CPV->getNumOperands(); i != e; ++i) {
1023 printConstant(cast<Constant>(CPV->getOperand(i)));
1030 case Type::PointerTyID:
1031 if (isa<ConstantPointerNull>(CPV)) {
1033 printType(Out, CPV->getType()); // sign doesn't matter
1034 Out << ")/*NULL*/0)";
1036 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(CPV)) {
1042 cerr << "Unknown constant type: " << *CPV << "\n";
1047 // Some constant expressions need to be casted back to the original types
1048 // because their operands were casted to the expected type. This function takes
1049 // care of detecting that case and printing the cast for the ConstantExpr.
1050 bool CWriter::printConstExprCast(const ConstantExpr* CE) {
1051 bool NeedsExplicitCast = false;
1052 const Type *Ty = CE->getOperand(0)->getType();
1053 bool TypeIsSigned = false;
1054 switch (CE->getOpcode()) {
1055 case Instruction::LShr:
1056 case Instruction::URem:
1057 case Instruction::UDiv: NeedsExplicitCast = true; break;
1058 case Instruction::AShr:
1059 case Instruction::SRem:
1060 case Instruction::SDiv: NeedsExplicitCast = true; TypeIsSigned = true; break;
1061 case Instruction::SExt:
1063 NeedsExplicitCast = true;
1064 TypeIsSigned = true;
1066 case Instruction::ZExt:
1067 case Instruction::Trunc:
1068 case Instruction::FPTrunc:
1069 case Instruction::FPExt:
1070 case Instruction::UIToFP:
1071 case Instruction::SIToFP:
1072 case Instruction::FPToUI:
1073 case Instruction::FPToSI:
1074 case Instruction::PtrToInt:
1075 case Instruction::IntToPtr:
1076 case Instruction::BitCast:
1078 NeedsExplicitCast = true;
1082 if (NeedsExplicitCast) {
1084 if (Ty->isInteger() && Ty != Type::Int1Ty)
1085 printSimpleType(Out, Ty, TypeIsSigned);
1087 printType(Out, Ty); // not integer, sign doesn't matter
1090 return NeedsExplicitCast;
1093 // Print a constant assuming that it is the operand for a given Opcode. The
1094 // opcodes that care about sign need to cast their operands to the expected
1095 // type before the operation proceeds. This function does the casting.
1096 void CWriter::printConstantWithCast(Constant* CPV, unsigned Opcode) {
1098 // Extract the operand's type, we'll need it.
1099 const Type* OpTy = CPV->getType();
1101 // Indicate whether to do the cast or not.
1102 bool shouldCast = false;
1103 bool typeIsSigned = false;
1105 // Based on the Opcode for which this Constant is being written, determine
1106 // the new type to which the operand should be casted by setting the value
1107 // of OpTy. If we change OpTy, also set shouldCast to true so it gets
1111 // for most instructions, it doesn't matter
1113 case Instruction::LShr:
1114 case Instruction::UDiv:
1115 case Instruction::URem:
1118 case Instruction::AShr:
1119 case Instruction::SDiv:
1120 case Instruction::SRem:
1122 typeIsSigned = true;
1126 // Write out the casted constant if we should, otherwise just write the
1130 printSimpleType(Out, OpTy, typeIsSigned);
1138 std::string CWriter::GetValueName(const Value *Operand) {
1141 if (!isa<GlobalValue>(Operand) && Operand->getName() != "") {
1142 std::string VarName;
1144 Name = Operand->getName();
1145 VarName.reserve(Name.capacity());
1147 for (std::string::iterator I = Name.begin(), E = Name.end();
1151 if (!((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
1152 (ch >= '0' && ch <= '9') || ch == '_'))
1158 Name = "llvm_cbe_" + VarName;
1160 Name = Mang->getValueName(Operand);
1166 void CWriter::writeOperandInternal(Value *Operand) {
1167 if (Instruction *I = dyn_cast<Instruction>(Operand))
1168 if (isInlinableInst(*I) && !isDirectAlloca(I)) {
1169 // Should we inline this instruction to build a tree?
1176 Constant* CPV = dyn_cast<Constant>(Operand);
1178 if (CPV && !isa<GlobalValue>(CPV))
1181 Out << GetValueName(Operand);
1184 void CWriter::writeOperandRaw(Value *Operand) {
1185 Constant* CPV = dyn_cast<Constant>(Operand);
1186 if (CPV && !isa<GlobalValue>(CPV)) {
1189 Out << GetValueName(Operand);
1193 void CWriter::writeOperand(Value *Operand) {
1194 if (isa<GlobalVariable>(Operand) || isDirectAlloca(Operand))
1195 Out << "(&"; // Global variables are referenced as their addresses by llvm
1197 writeOperandInternal(Operand);
1199 if (isa<GlobalVariable>(Operand) || isDirectAlloca(Operand))
1203 // Some instructions need to have their result value casted back to the
1204 // original types because their operands were casted to the expected type.
1205 // This function takes care of detecting that case and printing the cast
1206 // for the Instruction.
1207 bool CWriter::writeInstructionCast(const Instruction &I) {
1208 const Type *Ty = I.getOperand(0)->getType();
1209 switch (I.getOpcode()) {
1210 case Instruction::LShr:
1211 case Instruction::URem:
1212 case Instruction::UDiv:
1214 printSimpleType(Out, Ty, false);
1217 case Instruction::AShr:
1218 case Instruction::SRem:
1219 case Instruction::SDiv:
1221 printSimpleType(Out, Ty, true);
1229 // Write the operand with a cast to another type based on the Opcode being used.
1230 // This will be used in cases where an instruction has specific type
1231 // requirements (usually signedness) for its operands.
1232 void CWriter::writeOperandWithCast(Value* Operand, unsigned Opcode) {
1234 // Extract the operand's type, we'll need it.
1235 const Type* OpTy = Operand->getType();
1237 // Indicate whether to do the cast or not.
1238 bool shouldCast = false;
1240 // Indicate whether the cast should be to a signed type or not.
1241 bool castIsSigned = false;
1243 // Based on the Opcode for which this Operand is being written, determine
1244 // the new type to which the operand should be casted by setting the value
1245 // of OpTy. If we change OpTy, also set shouldCast to true.
1248 // for most instructions, it doesn't matter
1250 case Instruction::LShr:
1251 case Instruction::UDiv:
1252 case Instruction::URem: // Cast to unsigned first
1254 castIsSigned = false;
1256 case Instruction::AShr:
1257 case Instruction::SDiv:
1258 case Instruction::SRem: // Cast to signed first
1260 castIsSigned = true;
1264 // Write out the casted operand if we should, otherwise just write the
1268 printSimpleType(Out, OpTy, castIsSigned);
1270 if (castIsSigned && OpTy->getTypeID() == Type::IntegerTyID) {
1271 IMPL_SIGN_EXTENSION(OpTy, writeOperand(Operand));
1274 writeOperand(Operand);
1277 writeOperand(Operand);
1280 // Write the operand with a cast to another type based on the icmp predicate
1282 void CWriter::writeOperandWithCast(Value* Operand, ICmpInst::Predicate predicate) {
1284 // Extract the operand's type, we'll need it.
1285 const Type* OpTy = Operand->getType();
1287 // Indicate whether to do the cast or not.
1288 bool shouldCast = false;
1290 // Indicate whether the cast should be to a signed type or not.
1291 bool castIsSigned = false;
1293 // Based on the Opcode for which this Operand is being written, determine
1294 // the new type to which the operand should be casted by setting the value
1295 // of OpTy. If we change OpTy, also set shouldCast to true.
1296 switch (predicate) {
1298 // for eq and ne, it doesn't matter
1300 case ICmpInst::ICMP_EQ:
1301 case ICmpInst::ICMP_NE:
1302 case ICmpInst::ICMP_UGT:
1303 case ICmpInst::ICMP_UGE:
1304 case ICmpInst::ICMP_ULT:
1305 case ICmpInst::ICMP_ULE:
1308 case ICmpInst::ICMP_SGT:
1309 case ICmpInst::ICMP_SGE:
1310 case ICmpInst::ICMP_SLT:
1311 case ICmpInst::ICMP_SLE:
1313 castIsSigned = true;
1317 // Write out the casted operand if we should, otherwise just write the
1321 if (OpTy->isInteger() && OpTy != Type::Int1Ty)
1322 printSimpleType(Out, OpTy, castIsSigned);
1324 printType(Out, OpTy); // not integer, sign doesn't matter
1326 if(castIsSigned && OpTy->getTypeID() == Type::IntegerTyID) {
1327 IMPL_SIGN_EXTENSION(OpTy, writeOperand(Operand));
1329 writeOperand(Operand);
1330 if(OpTy->getTypeID() == Type::IntegerTyID){
1331 const IntegerType * IntTy = cast<IntegerType>(OpTy);
1332 uint64_t BitMask = IntTy->getBitMask();
1333 Out << "&" << BitMask << (IntTy->getBitWidth() <=32 ? "U": "ULL");
1338 writeOperand(Operand);
1339 if(OpTy->getTypeID() == Type::IntegerTyID){
1340 const IntegerType * IntTy = cast<IntegerType>(OpTy);
1341 uint64_t BitMask = IntTy->getBitMask();
1342 Out << "&" << BitMask << (IntTy->getBitWidth() <=32 ? "U": "ULL");
1347 // generateCompilerSpecificCode - This is where we add conditional compilation
1348 // directives to cater to specific compilers as need be.
1350 static void generateCompilerSpecificCode(std::ostream& Out) {
1351 // Alloca is hard to get, and we don't want to include stdlib.h here.
1352 Out << "/* get a declaration for alloca */\n"
1353 << "#if defined(__CYGWIN__) || defined(__MINGW32__)\n"
1354 << "#define alloca(x) __builtin_alloca((x))\n"
1355 << "#define _alloca(x) __builtin_alloca((x))\n"
1356 << "#elif defined(__APPLE__)\n"
1357 << "extern void *__builtin_alloca(unsigned long);\n"
1358 << "#define alloca(x) __builtin_alloca(x)\n"
1359 << "#define longjmp _longjmp\n"
1360 << "#define setjmp _setjmp\n"
1361 << "#elif defined(__sun__)\n"
1362 << "#if defined(__sparcv9)\n"
1363 << "extern void *__builtin_alloca(unsigned long);\n"
1365 << "extern void *__builtin_alloca(unsigned int);\n"
1367 << "#define alloca(x) __builtin_alloca(x)\n"
1368 << "#elif defined(__FreeBSD__) || defined(__OpenBSD__)\n"
1369 << "#define alloca(x) __builtin_alloca(x)\n"
1370 << "#elif defined(_MSC_VER)\n"
1371 << "#define inline _inline\n"
1372 << "#define alloca(x) _alloca(x)\n"
1374 << "#include <alloca.h>\n"
1377 // We output GCC specific attributes to preserve 'linkonce'ness on globals.
1378 // If we aren't being compiled with GCC, just drop these attributes.
1379 Out << "#ifndef __GNUC__ /* Can only support \"linkonce\" vars with GCC */\n"
1380 << "#define __attribute__(X)\n"
1383 // On Mac OS X, "external weak" is spelled "__attribute__((weak_import))".
1384 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1385 << "#define __EXTERNAL_WEAK__ __attribute__((weak_import))\n"
1386 << "#elif defined(__GNUC__)\n"
1387 << "#define __EXTERNAL_WEAK__ __attribute__((weak))\n"
1389 << "#define __EXTERNAL_WEAK__\n"
1392 // For now, turn off the weak linkage attribute on Mac OS X. (See above.)
1393 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1394 << "#define __ATTRIBUTE_WEAK__\n"
1395 << "#elif defined(__GNUC__)\n"
1396 << "#define __ATTRIBUTE_WEAK__ __attribute__((weak))\n"
1398 << "#define __ATTRIBUTE_WEAK__\n"
1401 // Add hidden visibility support. FIXME: APPLE_CC?
1402 Out << "#if defined(__GNUC__)\n"
1403 << "#define __HIDDEN__ __attribute__((visibility(\"hidden\")))\n"
1406 // Define NaN and Inf as GCC builtins if using GCC, as 0 otherwise
1407 // From the GCC documentation:
1409 // double __builtin_nan (const char *str)
1411 // This is an implementation of the ISO C99 function nan.
1413 // Since ISO C99 defines this function in terms of strtod, which we do
1414 // not implement, a description of the parsing is in order. The string is
1415 // parsed as by strtol; that is, the base is recognized by leading 0 or
1416 // 0x prefixes. The number parsed is placed in the significand such that
1417 // the least significant bit of the number is at the least significant
1418 // bit of the significand. The number is truncated to fit the significand
1419 // field provided. The significand is forced to be a quiet NaN.
1421 // This function, if given a string literal, is evaluated early enough
1422 // that it is considered a compile-time constant.
1424 // float __builtin_nanf (const char *str)
1426 // Similar to __builtin_nan, except the return type is float.
1428 // double __builtin_inf (void)
1430 // Similar to __builtin_huge_val, except a warning is generated if the
1431 // target floating-point format does not support infinities. This
1432 // function is suitable for implementing the ISO C99 macro INFINITY.
1434 // float __builtin_inff (void)
1436 // Similar to __builtin_inf, except the return type is float.
1437 Out << "#ifdef __GNUC__\n"
1438 << "#define LLVM_NAN(NanStr) __builtin_nan(NanStr) /* Double */\n"
1439 << "#define LLVM_NANF(NanStr) __builtin_nanf(NanStr) /* Float */\n"
1440 << "#define LLVM_NANS(NanStr) __builtin_nans(NanStr) /* Double */\n"
1441 << "#define LLVM_NANSF(NanStr) __builtin_nansf(NanStr) /* Float */\n"
1442 << "#define LLVM_INF __builtin_inf() /* Double */\n"
1443 << "#define LLVM_INFF __builtin_inff() /* Float */\n"
1444 << "#define LLVM_PREFETCH(addr,rw,locality) "
1445 "__builtin_prefetch(addr,rw,locality)\n"
1446 << "#define __ATTRIBUTE_CTOR__ __attribute__((constructor))\n"
1447 << "#define __ATTRIBUTE_DTOR__ __attribute__((destructor))\n"
1448 << "#define LLVM_ASM __asm__\n"
1450 << "#define LLVM_NAN(NanStr) ((double)0.0) /* Double */\n"
1451 << "#define LLVM_NANF(NanStr) 0.0F /* Float */\n"
1452 << "#define LLVM_NANS(NanStr) ((double)0.0) /* Double */\n"
1453 << "#define LLVM_NANSF(NanStr) 0.0F /* Float */\n"
1454 << "#define LLVM_INF ((double)0.0) /* Double */\n"
1455 << "#define LLVM_INFF 0.0F /* Float */\n"
1456 << "#define LLVM_PREFETCH(addr,rw,locality) /* PREFETCH */\n"
1457 << "#define __ATTRIBUTE_CTOR__\n"
1458 << "#define __ATTRIBUTE_DTOR__\n"
1459 << "#define LLVM_ASM(X)\n"
1462 // Output target-specific code that should be inserted into main.
1463 Out << "#define CODE_FOR_MAIN() /* Any target-specific code for main()*/\n";
1464 // On X86, set the FP control word to 64-bits of precision instead of 80 bits.
1465 Out << "#if defined(__GNUC__) && !defined(__llvm__)\n"
1466 << "#if defined(i386) || defined(__i386__) || defined(__i386) || "
1467 << "defined(__x86_64__)\n"
1468 << "#undef CODE_FOR_MAIN\n"
1469 << "#define CODE_FOR_MAIN() \\\n"
1470 << " {short F;__asm__ (\"fnstcw %0\" : \"=m\" (*&F)); \\\n"
1471 << " F=(F&~0x300)|0x200;__asm__(\"fldcw %0\"::\"m\"(*&F));}\n"
1472 << "#endif\n#endif\n";
1476 /// FindStaticTors - Given a static ctor/dtor list, unpack its contents into
1477 /// the StaticTors set.
1478 static void FindStaticTors(GlobalVariable *GV, std::set<Function*> &StaticTors){
1479 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
1480 if (!InitList) return;
1482 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
1483 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
1484 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
1486 if (CS->getOperand(1)->isNullValue())
1487 return; // Found a null terminator, exit printing.
1488 Constant *FP = CS->getOperand(1);
1489 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
1491 FP = CE->getOperand(0);
1492 if (Function *F = dyn_cast<Function>(FP))
1493 StaticTors.insert(F);
1497 enum SpecialGlobalClass {
1499 GlobalCtors, GlobalDtors,
1503 /// getGlobalVariableClass - If this is a global that is specially recognized
1504 /// by LLVM, return a code that indicates how we should handle it.
1505 static SpecialGlobalClass getGlobalVariableClass(const GlobalVariable *GV) {
1506 // If this is a global ctors/dtors list, handle it now.
1507 if (GV->hasAppendingLinkage() && GV->use_empty()) {
1508 if (GV->getName() == "llvm.global_ctors")
1510 else if (GV->getName() == "llvm.global_dtors")
1514 // Otherwise, it it is other metadata, don't print it. This catches things
1515 // like debug information.
1516 if (GV->getSection() == "llvm.metadata")
1523 bool CWriter::doInitialization(Module &M) {
1527 TD = new TargetData(&M);
1528 IL = new IntrinsicLowering(*TD);
1529 IL->AddPrototypes(M);
1531 // Ensure that all structure types have names...
1532 Mang = new Mangler(M);
1533 Mang->markCharUnacceptable('.');
1535 // Keep track of which functions are static ctors/dtors so they can have
1536 // an attribute added to their prototypes.
1537 std::set<Function*> StaticCtors, StaticDtors;
1538 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1540 switch (getGlobalVariableClass(I)) {
1543 FindStaticTors(I, StaticCtors);
1546 FindStaticTors(I, StaticDtors);
1551 // get declaration for alloca
1552 Out << "/* Provide Declarations */\n";
1553 Out << "#include <stdarg.h>\n"; // Varargs support
1554 Out << "#include <setjmp.h>\n"; // Unwind support
1555 generateCompilerSpecificCode(Out);
1557 // Provide a definition for `bool' if not compiling with a C++ compiler.
1559 << "#ifndef __cplusplus\ntypedef unsigned char bool;\n#endif\n"
1561 << "\n\n/* Support for floating point constants */\n"
1562 << "typedef unsigned long long ConstantDoubleTy;\n"
1563 << "typedef unsigned int ConstantFloatTy;\n"
1565 << "\n\n/* Global Declarations */\n";
1567 // First output all the declarations for the program, because C requires
1568 // Functions & globals to be declared before they are used.
1571 // Loop over the symbol table, emitting all named constants...
1572 printModuleTypes(M.getTypeSymbolTable());
1574 // Global variable declarations...
1575 if (!M.global_empty()) {
1576 Out << "\n/* External Global Variable Declarations */\n";
1577 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1580 if (I->hasExternalLinkage() || I->hasExternalWeakLinkage())
1582 else if (I->hasDLLImportLinkage())
1583 Out << "__declspec(dllimport) ";
1585 continue; // Internal Global
1587 // Thread Local Storage
1588 if (I->isThreadLocal())
1591 printType(Out, I->getType()->getElementType(), false, GetValueName(I));
1593 if (I->hasExternalWeakLinkage())
1594 Out << " __EXTERNAL_WEAK__";
1599 // Function declarations
1600 Out << "\n/* Function Declarations */\n";
1601 Out << "double fmod(double, double);\n"; // Support for FP rem
1602 Out << "float fmodf(float, float);\n";
1604 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
1605 // Don't print declarations for intrinsic functions.
1606 if (!I->getIntrinsicID() && I->getName() != "setjmp" &&
1607 I->getName() != "longjmp" && I->getName() != "_setjmp") {
1608 if (I->hasExternalWeakLinkage())
1610 printFunctionSignature(I, true);
1611 if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
1612 Out << " __ATTRIBUTE_WEAK__";
1613 if (I->hasExternalWeakLinkage())
1614 Out << " __EXTERNAL_WEAK__";
1615 if (StaticCtors.count(I))
1616 Out << " __ATTRIBUTE_CTOR__";
1617 if (StaticDtors.count(I))
1618 Out << " __ATTRIBUTE_DTOR__";
1619 if (I->hasHiddenVisibility())
1620 Out << " __HIDDEN__";
1622 if (I->hasName() && I->getName()[0] == 1)
1623 Out << " LLVM_ASM(\"" << I->getName().c_str()+1 << "\")";
1629 // Output the global variable declarations
1630 if (!M.global_empty()) {
1631 Out << "\n\n/* Global Variable Declarations */\n";
1632 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1634 if (!I->isDeclaration()) {
1635 // Ignore special globals, such as debug info.
1636 if (getGlobalVariableClass(I))
1639 if (I->hasInternalLinkage())
1644 // Thread Local Storage
1645 if (I->isThreadLocal())
1648 printType(Out, I->getType()->getElementType(), false,
1651 if (I->hasLinkOnceLinkage())
1652 Out << " __attribute__((common))";
1653 else if (I->hasWeakLinkage())
1654 Out << " __ATTRIBUTE_WEAK__";
1655 else if (I->hasExternalWeakLinkage())
1656 Out << " __EXTERNAL_WEAK__";
1657 if (I->hasHiddenVisibility())
1658 Out << " __HIDDEN__";
1663 // Output the global variable definitions and contents...
1664 if (!M.global_empty()) {
1665 Out << "\n\n/* Global Variable Definitions and Initialization */\n";
1666 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1668 if (!I->isDeclaration()) {
1669 // Ignore special globals, such as debug info.
1670 if (getGlobalVariableClass(I))
1673 if (I->hasInternalLinkage())
1675 else if (I->hasDLLImportLinkage())
1676 Out << "__declspec(dllimport) ";
1677 else if (I->hasDLLExportLinkage())
1678 Out << "__declspec(dllexport) ";
1680 // Thread Local Storage
1681 if (I->isThreadLocal())
1684 printType(Out, I->getType()->getElementType(), false,
1686 if (I->hasLinkOnceLinkage())
1687 Out << " __attribute__((common))";
1688 else if (I->hasWeakLinkage())
1689 Out << " __ATTRIBUTE_WEAK__";
1691 if (I->hasHiddenVisibility())
1692 Out << " __HIDDEN__";
1694 // If the initializer is not null, emit the initializer. If it is null,
1695 // we try to avoid emitting large amounts of zeros. The problem with
1696 // this, however, occurs when the variable has weak linkage. In this
1697 // case, the assembler will complain about the variable being both weak
1698 // and common, so we disable this optimization.
1699 if (!I->getInitializer()->isNullValue()) {
1701 writeOperand(I->getInitializer());
1702 } else if (I->hasWeakLinkage()) {
1703 // We have to specify an initializer, but it doesn't have to be
1704 // complete. If the value is an aggregate, print out { 0 }, and let
1705 // the compiler figure out the rest of the zeros.
1707 if (isa<StructType>(I->getInitializer()->getType()) ||
1708 isa<ArrayType>(I->getInitializer()->getType()) ||
1709 isa<VectorType>(I->getInitializer()->getType())) {
1712 // Just print it out normally.
1713 writeOperand(I->getInitializer());
1721 Out << "\n\n/* Function Bodies */\n";
1723 // Emit some helper functions for dealing with FCMP instruction's
1725 Out << "static inline int llvm_fcmp_ord(double X, double Y) { ";
1726 Out << "return X == X && Y == Y; }\n";
1727 Out << "static inline int llvm_fcmp_uno(double X, double Y) { ";
1728 Out << "return X != X || Y != Y; }\n";
1729 Out << "static inline int llvm_fcmp_ueq(double X, double Y) { ";
1730 Out << "return X == Y || llvm_fcmp_uno(X, Y); }\n";
1731 Out << "static inline int llvm_fcmp_une(double X, double Y) { ";
1732 Out << "return X != Y; }\n";
1733 Out << "static inline int llvm_fcmp_ult(double X, double Y) { ";
1734 Out << "return X < Y || llvm_fcmp_uno(X, Y); }\n";
1735 Out << "static inline int llvm_fcmp_ugt(double X, double Y) { ";
1736 Out << "return X > Y || llvm_fcmp_uno(X, Y); }\n";
1737 Out << "static inline int llvm_fcmp_ule(double X, double Y) { ";
1738 Out << "return X <= Y || llvm_fcmp_uno(X, Y); }\n";
1739 Out << "static inline int llvm_fcmp_uge(double X, double Y) { ";
1740 Out << "return X >= Y || llvm_fcmp_uno(X, Y); }\n";
1741 Out << "static inline int llvm_fcmp_oeq(double X, double Y) { ";
1742 Out << "return X == Y ; }\n";
1743 Out << "static inline int llvm_fcmp_one(double X, double Y) { ";
1744 Out << "return X != Y && llvm_fcmp_ord(X, Y); }\n";
1745 Out << "static inline int llvm_fcmp_olt(double X, double Y) { ";
1746 Out << "return X < Y ; }\n";
1747 Out << "static inline int llvm_fcmp_ogt(double X, double Y) { ";
1748 Out << "return X > Y ; }\n";
1749 Out << "static inline int llvm_fcmp_ole(double X, double Y) { ";
1750 Out << "return X <= Y ; }\n";
1751 Out << "static inline int llvm_fcmp_oge(double X, double Y) { ";
1752 Out << "return X >= Y ; }\n";
1757 /// Output all floating point constants that cannot be printed accurately...
1758 void CWriter::printFloatingPointConstants(Function &F) {
1759 // Scan the module for floating point constants. If any FP constant is used
1760 // in the function, we want to redirect it here so that we do not depend on
1761 // the precision of the printed form, unless the printed form preserves
1764 static unsigned FPCounter = 0;
1765 for (constant_iterator I = constant_begin(&F), E = constant_end(&F);
1767 if (const ConstantFP *FPC = dyn_cast<ConstantFP>(*I))
1768 if (!isFPCSafeToPrint(FPC) && // Do not put in FPConstantMap if safe.
1769 !FPConstantMap.count(FPC)) {
1770 double Val = FPC->getValue();
1772 FPConstantMap[FPC] = FPCounter; // Number the FP constants
1774 if (FPC->getType() == Type::DoubleTy) {
1775 Out << "static const ConstantDoubleTy FPConstant" << FPCounter++
1776 << " = 0x" << std::hex << DoubleToBits(Val) << std::dec
1777 << "ULL; /* " << Val << " */\n";
1778 } else if (FPC->getType() == Type::FloatTy) {
1779 Out << "static const ConstantFloatTy FPConstant" << FPCounter++
1780 << " = 0x" << std::hex << FloatToBits(Val) << std::dec
1781 << "U; /* " << Val << " */\n";
1783 assert(0 && "Unknown float type!");
1790 /// printSymbolTable - Run through symbol table looking for type names. If a
1791 /// type name is found, emit its declaration...
1793 void CWriter::printModuleTypes(const TypeSymbolTable &TST) {
1794 Out << "/* Helper union for bitcasts */\n";
1795 Out << "typedef union {\n";
1796 Out << " unsigned int Int32;\n";
1797 Out << " unsigned long long Int64;\n";
1798 Out << " float Float;\n";
1799 Out << " double Double;\n";
1800 Out << "} llvmBitCastUnion;\n";
1802 // We are only interested in the type plane of the symbol table.
1803 TypeSymbolTable::const_iterator I = TST.begin();
1804 TypeSymbolTable::const_iterator End = TST.end();
1806 // If there are no type names, exit early.
1807 if (I == End) return;
1809 // Print out forward declarations for structure types before anything else!
1810 Out << "/* Structure forward decls */\n";
1811 for (; I != End; ++I) {
1812 std::string Name = "struct l_" + Mang->makeNameProper(I->first);
1813 Out << Name << ";\n";
1814 TypeNames.insert(std::make_pair(I->second, Name));
1819 // Now we can print out typedefs. Above, we guaranteed that this can only be
1820 // for struct or opaque types.
1821 Out << "/* Typedefs */\n";
1822 for (I = TST.begin(); I != End; ++I) {
1823 std::string Name = "l_" + Mang->makeNameProper(I->first);
1825 printType(Out, I->second, false, Name);
1831 // Keep track of which structures have been printed so far...
1832 std::set<const StructType *> StructPrinted;
1834 // Loop over all structures then push them into the stack so they are
1835 // printed in the correct order.
1837 Out << "/* Structure contents */\n";
1838 for (I = TST.begin(); I != End; ++I)
1839 if (const StructType *STy = dyn_cast<StructType>(I->second))
1840 // Only print out used types!
1841 printContainedStructs(STy, StructPrinted);
1844 // Push the struct onto the stack and recursively push all structs
1845 // this one depends on.
1847 // TODO: Make this work properly with vector types
1849 void CWriter::printContainedStructs(const Type *Ty,
1850 std::set<const StructType*> &StructPrinted){
1851 // Don't walk through pointers.
1852 if (isa<PointerType>(Ty) || Ty->isPrimitiveType() || Ty->isInteger()) return;
1854 // Print all contained types first.
1855 for (Type::subtype_iterator I = Ty->subtype_begin(),
1856 E = Ty->subtype_end(); I != E; ++I)
1857 printContainedStructs(*I, StructPrinted);
1859 if (const StructType *STy = dyn_cast<StructType>(Ty)) {
1860 // Check to see if we have already printed this struct.
1861 if (StructPrinted.insert(STy).second) {
1862 // Print structure type out.
1863 std::string Name = TypeNames[STy];
1864 printType(Out, STy, false, Name, true);
1870 void CWriter::printFunctionSignature(const Function *F, bool Prototype) {
1871 /// isStructReturn - Should this function actually return a struct by-value?
1872 bool isStructReturn = F->getFunctionType()->isStructReturn();
1874 if (F->hasInternalLinkage()) Out << "static ";
1875 if (F->hasDLLImportLinkage()) Out << "__declspec(dllimport) ";
1876 if (F->hasDLLExportLinkage()) Out << "__declspec(dllexport) ";
1877 switch (F->getCallingConv()) {
1878 case CallingConv::X86_StdCall:
1879 Out << "__stdcall ";
1881 case CallingConv::X86_FastCall:
1882 Out << "__fastcall ";
1886 // Loop over the arguments, printing them...
1887 const FunctionType *FT = cast<FunctionType>(F->getFunctionType());
1888 const ParamAttrsList *Attrs = FT->getParamAttrs();
1890 std::stringstream FunctionInnards;
1892 // Print out the name...
1893 FunctionInnards << GetValueName(F) << '(';
1895 bool PrintedArg = false;
1896 if (!F->isDeclaration()) {
1897 if (!F->arg_empty()) {
1898 Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
1900 // If this is a struct-return function, don't print the hidden
1901 // struct-return argument.
1902 if (isStructReturn) {
1903 assert(I != E && "Invalid struct return function!");
1907 std::string ArgName;
1909 for (; I != E; ++I) {
1910 if (PrintedArg) FunctionInnards << ", ";
1911 if (I->hasName() || !Prototype)
1912 ArgName = GetValueName(I);
1915 printType(FunctionInnards, I->getType(),
1916 /*isSigned=*/Attrs && Attrs->paramHasAttr(Idx, ParamAttr::SExt),
1923 // Loop over the arguments, printing them.
1924 FunctionType::param_iterator I = FT->param_begin(), E = FT->param_end();
1926 // If this is a struct-return function, don't print the hidden
1927 // struct-return argument.
1928 if (isStructReturn) {
1929 assert(I != E && "Invalid struct return function!");
1934 for (; I != E; ++I) {
1935 if (PrintedArg) FunctionInnards << ", ";
1936 printType(FunctionInnards, *I,
1937 /*isSigned=*/Attrs && Attrs->paramHasAttr(Idx, ParamAttr::SExt));
1943 // Finish printing arguments... if this is a vararg function, print the ...,
1944 // unless there are no known types, in which case, we just emit ().
1946 if (FT->isVarArg() && PrintedArg) {
1947 if (PrintedArg) FunctionInnards << ", ";
1948 FunctionInnards << "..."; // Output varargs portion of signature!
1949 } else if (!FT->isVarArg() && !PrintedArg) {
1950 FunctionInnards << "void"; // ret() -> ret(void) in C.
1952 FunctionInnards << ')';
1954 // Get the return tpe for the function.
1956 if (!isStructReturn)
1957 RetTy = F->getReturnType();
1959 // If this is a struct-return function, print the struct-return type.
1960 RetTy = cast<PointerType>(FT->getParamType(0))->getElementType();
1963 // Print out the return type and the signature built above.
1964 printType(Out, RetTy,
1965 /*isSigned=*/ Attrs && Attrs->paramHasAttr(0, ParamAttr::SExt),
1966 FunctionInnards.str());
1969 static inline bool isFPIntBitCast(const Instruction &I) {
1970 if (!isa<BitCastInst>(I))
1972 const Type *SrcTy = I.getOperand(0)->getType();
1973 const Type *DstTy = I.getType();
1974 return (SrcTy->isFloatingPoint() && DstTy->isInteger()) ||
1975 (DstTy->isFloatingPoint() && SrcTy->isInteger());
1978 void CWriter::printFunction(Function &F) {
1979 /// isStructReturn - Should this function actually return a struct by-value?
1980 bool isStructReturn = F.getFunctionType()->isStructReturn();
1982 printFunctionSignature(&F, false);
1985 // If this is a struct return function, handle the result with magic.
1986 if (isStructReturn) {
1987 const Type *StructTy =
1988 cast<PointerType>(F.arg_begin()->getType())->getElementType();
1990 printType(Out, StructTy, false, "StructReturn");
1991 Out << "; /* Struct return temporary */\n";
1994 printType(Out, F.arg_begin()->getType(), false,
1995 GetValueName(F.arg_begin()));
1996 Out << " = &StructReturn;\n";
1999 bool PrintedVar = false;
2001 // print local variable information for the function
2002 for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I) {
2003 if (const AllocaInst *AI = isDirectAlloca(&*I)) {
2005 printType(Out, AI->getAllocatedType(), false, GetValueName(AI));
2006 Out << "; /* Address-exposed local */\n";
2008 } else if (I->getType() != Type::VoidTy && !isInlinableInst(*I)) {
2010 printType(Out, I->getType(), false, GetValueName(&*I));
2013 if (isa<PHINode>(*I)) { // Print out PHI node temporaries as well...
2015 printType(Out, I->getType(), false,
2016 GetValueName(&*I)+"__PHI_TEMPORARY");
2021 // We need a temporary for the BitCast to use so it can pluck a value out
2022 // of a union to do the BitCast. This is separate from the need for a
2023 // variable to hold the result of the BitCast.
2024 if (isFPIntBitCast(*I)) {
2025 Out << " llvmBitCastUnion " << GetValueName(&*I)
2026 << "__BITCAST_TEMPORARY;\n";
2034 if (F.hasExternalLinkage() && F.getName() == "main")
2035 Out << " CODE_FOR_MAIN();\n";
2037 // print the basic blocks
2038 for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
2039 if (Loop *L = LI->getLoopFor(BB)) {
2040 if (L->getHeader() == BB && L->getParentLoop() == 0)
2043 printBasicBlock(BB);
2050 void CWriter::printLoop(Loop *L) {
2051 Out << " do { /* Syntactic loop '" << L->getHeader()->getName()
2052 << "' to make GCC happy */\n";
2053 for (unsigned i = 0, e = L->getBlocks().size(); i != e; ++i) {
2054 BasicBlock *BB = L->getBlocks()[i];
2055 Loop *BBLoop = LI->getLoopFor(BB);
2057 printBasicBlock(BB);
2058 else if (BB == BBLoop->getHeader() && BBLoop->getParentLoop() == L)
2061 Out << " } while (1); /* end of syntactic loop '"
2062 << L->getHeader()->getName() << "' */\n";
2065 void CWriter::printBasicBlock(BasicBlock *BB) {
2067 // Don't print the label for the basic block if there are no uses, or if
2068 // the only terminator use is the predecessor basic block's terminator.
2069 // We have to scan the use list because PHI nodes use basic blocks too but
2070 // do not require a label to be generated.
2072 bool NeedsLabel = false;
2073 for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI)
2074 if (isGotoCodeNecessary(*PI, BB)) {
2079 if (NeedsLabel) Out << GetValueName(BB) << ":\n";
2081 // Output all of the instructions in the basic block...
2082 for (BasicBlock::iterator II = BB->begin(), E = --BB->end(); II != E;
2084 if (!isInlinableInst(*II) && !isDirectAlloca(II)) {
2085 if (II->getType() != Type::VoidTy && !isInlineAsm(*II))
2094 // Don't emit prefix or suffix for the terminator...
2095 visit(*BB->getTerminator());
2099 // Specific Instruction type classes... note that all of the casts are
2100 // necessary because we use the instruction classes as opaque types...
2102 void CWriter::visitReturnInst(ReturnInst &I) {
2103 // If this is a struct return function, return the temporary struct.
2104 bool isStructReturn = I.getParent()->getParent()->
2105 getFunctionType()->isStructReturn();
2107 if (isStructReturn) {
2108 Out << " return StructReturn;\n";
2112 // Don't output a void return if this is the last basic block in the function
2113 if (I.getNumOperands() == 0 &&
2114 &*--I.getParent()->getParent()->end() == I.getParent() &&
2115 !I.getParent()->size() == 1) {
2120 if (I.getNumOperands()) {
2122 writeOperand(I.getOperand(0));
2127 void CWriter::visitSwitchInst(SwitchInst &SI) {
2130 writeOperand(SI.getOperand(0));
2131 Out << ") {\n default:\n";
2132 printPHICopiesForSuccessor (SI.getParent(), SI.getDefaultDest(), 2);
2133 printBranchToBlock(SI.getParent(), SI.getDefaultDest(), 2);
2135 for (unsigned i = 2, e = SI.getNumOperands(); i != e; i += 2) {
2137 writeOperand(SI.getOperand(i));
2139 BasicBlock *Succ = cast<BasicBlock>(SI.getOperand(i+1));
2140 printPHICopiesForSuccessor (SI.getParent(), Succ, 2);
2141 printBranchToBlock(SI.getParent(), Succ, 2);
2142 if (Function::iterator(Succ) == next(Function::iterator(SI.getParent())))
2148 void CWriter::visitUnreachableInst(UnreachableInst &I) {
2149 Out << " /*UNREACHABLE*/;\n";
2152 bool CWriter::isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
2153 /// FIXME: This should be reenabled, but loop reordering safe!!
2156 if (next(Function::iterator(From)) != Function::iterator(To))
2157 return true; // Not the direct successor, we need a goto.
2159 //isa<SwitchInst>(From->getTerminator())
2161 if (LI->getLoopFor(From) != LI->getLoopFor(To))
2166 void CWriter::printPHICopiesForSuccessor (BasicBlock *CurBlock,
2167 BasicBlock *Successor,
2169 for (BasicBlock::iterator I = Successor->begin(); isa<PHINode>(I); ++I) {
2170 PHINode *PN = cast<PHINode>(I);
2171 // Now we have to do the printing.
2172 Value *IV = PN->getIncomingValueForBlock(CurBlock);
2173 if (!isa<UndefValue>(IV)) {
2174 Out << std::string(Indent, ' ');
2175 Out << " " << GetValueName(I) << "__PHI_TEMPORARY = ";
2177 Out << "; /* for PHI node */\n";
2182 void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
2184 if (isGotoCodeNecessary(CurBB, Succ)) {
2185 Out << std::string(Indent, ' ') << " goto ";
2191 // Branch instruction printing - Avoid printing out a branch to a basic block
2192 // that immediately succeeds the current one.
2194 void CWriter::visitBranchInst(BranchInst &I) {
2196 if (I.isConditional()) {
2197 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(0))) {
2199 writeOperand(I.getCondition());
2202 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 2);
2203 printBranchToBlock(I.getParent(), I.getSuccessor(0), 2);
2205 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(1))) {
2206 Out << " } else {\n";
2207 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2208 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2211 // First goto not necessary, assume second one is...
2213 writeOperand(I.getCondition());
2216 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2217 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2222 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 0);
2223 printBranchToBlock(I.getParent(), I.getSuccessor(0), 0);
2228 // PHI nodes get copied into temporary values at the end of predecessor basic
2229 // blocks. We now need to copy these temporary values into the REAL value for
2231 void CWriter::visitPHINode(PHINode &I) {
2233 Out << "__PHI_TEMPORARY";
2237 void CWriter::visitBinaryOperator(Instruction &I) {
2238 // binary instructions, shift instructions, setCond instructions.
2239 assert(!isa<PointerType>(I.getType()));
2241 // We must cast the results of binary operations which might be promoted.
2242 bool needsCast = false;
2243 if ((I.getType() == Type::Int8Ty) || (I.getType() == Type::Int16Ty)
2244 || (I.getType() == Type::FloatTy)) {
2247 printType(Out, I.getType(), false);
2251 // If this is a negation operation, print it out as such. For FP, we don't
2252 // want to print "-0.0 - X".
2253 if (BinaryOperator::isNeg(&I)) {
2255 writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
2257 } else if (I.getOpcode() == Instruction::FRem) {
2258 // Output a call to fmod/fmodf instead of emitting a%b
2259 if (I.getType() == Type::FloatTy)
2263 writeOperand(I.getOperand(0));
2265 writeOperand(I.getOperand(1));
2269 // Write out the cast of the instruction's value back to the proper type
2271 bool NeedsClosingParens = writeInstructionCast(I);
2273 // Certain instructions require the operand to be forced to a specific type
2274 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2275 // below for operand 1
2276 writeOperandWithCast(I.getOperand(0), I.getOpcode());
2278 switch (I.getOpcode()) {
2279 case Instruction::Add: Out << " + "; break;
2280 case Instruction::Sub: Out << " - "; break;
2281 case Instruction::Mul: Out << " * "; break;
2282 case Instruction::URem:
2283 case Instruction::SRem:
2284 case Instruction::FRem: Out << " % "; break;
2285 case Instruction::UDiv:
2286 case Instruction::SDiv:
2287 case Instruction::FDiv: Out << " / "; break;
2288 case Instruction::And: Out << " & "; break;
2289 case Instruction::Or: Out << " | "; break;
2290 case Instruction::Xor: Out << " ^ "; break;
2291 case Instruction::Shl : Out << " << "; break;
2292 case Instruction::LShr:
2293 case Instruction::AShr: Out << " >> "; break;
2294 default: cerr << "Invalid operator type!" << I; abort();
2297 writeOperandWithCast(I.getOperand(1), I.getOpcode());
2298 if (NeedsClosingParens)
2307 void CWriter::visitICmpInst(ICmpInst &I) {
2308 // We must cast the results of icmp which might be promoted.
2309 bool needsCast = false;
2311 // Write out the cast of the instruction's value back to the proper type
2313 bool NeedsClosingParens = writeInstructionCast(I);
2315 // Certain icmp predicate require the operand to be forced to a specific type
2316 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2317 // below for operand 1
2318 writeOperandWithCast(I.getOperand(0), I.getPredicate());
2320 switch (I.getPredicate()) {
2321 case ICmpInst::ICMP_EQ: Out << " == "; break;
2322 case ICmpInst::ICMP_NE: Out << " != "; break;
2323 case ICmpInst::ICMP_ULE:
2324 case ICmpInst::ICMP_SLE: Out << " <= "; break;
2325 case ICmpInst::ICMP_UGE:
2326 case ICmpInst::ICMP_SGE: Out << " >= "; break;
2327 case ICmpInst::ICMP_ULT:
2328 case ICmpInst::ICMP_SLT: Out << " < "; break;
2329 case ICmpInst::ICMP_UGT:
2330 case ICmpInst::ICMP_SGT: Out << " > "; break;
2331 default: cerr << "Invalid icmp predicate!" << I; abort();
2334 writeOperandWithCast(I.getOperand(1), I.getPredicate());
2335 if (NeedsClosingParens)
2343 void CWriter::visitFCmpInst(FCmpInst &I) {
2344 if (I.getPredicate() == FCmpInst::FCMP_FALSE) {
2348 if (I.getPredicate() == FCmpInst::FCMP_TRUE) {
2354 switch (I.getPredicate()) {
2355 default: assert(0 && "Illegal FCmp predicate");
2356 case FCmpInst::FCMP_ORD: op = "ord"; break;
2357 case FCmpInst::FCMP_UNO: op = "uno"; break;
2358 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
2359 case FCmpInst::FCMP_UNE: op = "une"; break;
2360 case FCmpInst::FCMP_ULT: op = "ult"; break;
2361 case FCmpInst::FCMP_ULE: op = "ule"; break;
2362 case FCmpInst::FCMP_UGT: op = "ugt"; break;
2363 case FCmpInst::FCMP_UGE: op = "uge"; break;
2364 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
2365 case FCmpInst::FCMP_ONE: op = "one"; break;
2366 case FCmpInst::FCMP_OLT: op = "olt"; break;
2367 case FCmpInst::FCMP_OLE: op = "ole"; break;
2368 case FCmpInst::FCMP_OGT: op = "ogt"; break;
2369 case FCmpInst::FCMP_OGE: op = "oge"; break;
2372 Out << "llvm_fcmp_" << op << "(";
2373 // Write the first operand
2374 writeOperand(I.getOperand(0));
2376 // Write the second operand
2377 writeOperand(I.getOperand(1));
2381 static const char * getFloatBitCastField(const Type *Ty) {
2382 switch (Ty->getTypeID()) {
2383 default: assert(0 && "Invalid Type");
2384 case Type::FloatTyID: return "Float";
2385 case Type::DoubleTyID: return "Double";
2386 case Type::IntegerTyID: {
2387 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
2396 void CWriter::visitCastInst(CastInst &I) {
2397 const Type *DstTy = I.getType();
2398 const Type *SrcTy = I.getOperand(0)->getType();
2400 if (isFPIntBitCast(I)) {
2401 // These int<->float and long<->double casts need to be handled specially
2402 Out << GetValueName(&I) << "__BITCAST_TEMPORARY."
2403 << getFloatBitCastField(I.getOperand(0)->getType()) << " = ";
2404 writeOperand(I.getOperand(0));
2405 Out << ", " << GetValueName(&I) << "__BITCAST_TEMPORARY."
2406 << getFloatBitCastField(I.getType());
2408 printCast(I.getOpcode(), SrcTy, DstTy);
2409 if (I.getOpcode() == Instruction::Trunc ||
2410 I.getOpcode() == Instruction::FPToUI ||
2411 I.getOpcode() == Instruction::FPToSI ||
2412 I.getOpcode() == Instruction::PtrToInt) {
2413 if (const IntegerType* IntTy = dyn_cast<IntegerType>(DstTy)){
2414 uint64_t BitMask = IntTy->getBitMask();
2415 writeOperand(I.getOperand(0));
2416 Out << "&" << BitMask << (IntTy->getBitWidth() <=32 ? "U": "ULL");
2418 } else if (I.getOpcode() == Instruction::SExt && SrcTy == Type::Int1Ty) {
2419 // Make sure we really get a sext from bool by subtracing the bool from 0
2421 writeOperand(I.getOperand(0));
2422 } else if (I.getOpcode() == Instruction::SExt &&
2423 SrcTy->getTypeID() == Type::IntegerTyID) {
2424 IMPL_SIGN_EXTENSION(SrcTy, writeOperand(I.getOperand(0)) );
2425 } else if (I.getOpcode() == Instruction::ZExt &&
2426 SrcTy->getTypeID() == Type::IntegerTyID) {
2427 const IntegerType* IntTy = cast<IntegerType>(SrcTy);
2428 uint64_t BitMask = IntTy->getBitMask();
2429 writeOperand(I.getOperand(0));
2430 Out << "&" << BitMask << (IntTy->getBitWidth() <=32 ? "U": "ULL");
2433 writeOperand(I.getOperand(0));
2438 void CWriter::visitSelectInst(SelectInst &I) {
2440 writeOperand(I.getCondition());
2442 writeOperand(I.getTrueValue());
2444 writeOperand(I.getFalseValue());
2449 void CWriter::lowerIntrinsics(Function &F) {
2450 // This is used to keep track of intrinsics that get generated to a lowered
2451 // function. We must generate the prototypes before the function body which
2452 // will only be expanded on first use (by the loop below).
2453 std::vector<Function*> prototypesToGen;
2455 // Examine all the instructions in this function to find the intrinsics that
2456 // need to be lowered.
2457 for (Function::iterator BB = F.begin(), EE = F.end(); BB != EE; ++BB)
2458 for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; )
2459 if (CallInst *CI = dyn_cast<CallInst>(I++))
2460 if (Function *F = CI->getCalledFunction())
2461 switch (F->getIntrinsicID()) {
2462 case Intrinsic::not_intrinsic:
2463 case Intrinsic::vastart:
2464 case Intrinsic::vacopy:
2465 case Intrinsic::vaend:
2466 case Intrinsic::returnaddress:
2467 case Intrinsic::frameaddress:
2468 case Intrinsic::setjmp:
2469 case Intrinsic::longjmp:
2470 case Intrinsic::prefetch:
2471 case Intrinsic::dbg_stoppoint:
2472 case Intrinsic::powi_f32:
2473 case Intrinsic::powi_f64:
2474 // We directly implement these intrinsics
2477 // If this is an intrinsic that directly corresponds to a GCC
2478 // builtin, we handle it.
2479 const char *BuiltinName = "";
2480 #define GET_GCC_BUILTIN_NAME
2481 #include "llvm/Intrinsics.gen"
2482 #undef GET_GCC_BUILTIN_NAME
2483 // If we handle it, don't lower it.
2484 if (BuiltinName[0]) break;
2486 // All other intrinsic calls we must lower.
2487 Instruction *Before = 0;
2488 if (CI != &BB->front())
2489 Before = prior(BasicBlock::iterator(CI));
2491 IL->LowerIntrinsicCall(CI);
2492 if (Before) { // Move iterator to instruction after call
2497 // If the intrinsic got lowered to another call, and that call has
2498 // a definition then we need to make sure its prototype is emitted
2499 // before any calls to it.
2500 if (CallInst *Call = dyn_cast<CallInst>(I))
2501 if (Function *NewF = Call->getCalledFunction())
2502 if (!NewF->isDeclaration())
2503 prototypesToGen.push_back(NewF);
2508 // We may have collected some prototypes to emit in the loop above.
2509 // Emit them now, before the function that uses them is emitted. But,
2510 // be careful not to emit them twice.
2511 std::vector<Function*>::iterator I = prototypesToGen.begin();
2512 std::vector<Function*>::iterator E = prototypesToGen.end();
2513 for ( ; I != E; ++I) {
2514 if (intrinsicPrototypesAlreadyGenerated.insert(*I).second) {
2516 printFunctionSignature(*I, true);
2523 void CWriter::visitCallInst(CallInst &I) {
2524 //check if we have inline asm
2525 if (isInlineAsm(I)) {
2530 bool WroteCallee = false;
2532 // Handle intrinsic function calls first...
2533 if (Function *F = I.getCalledFunction())
2534 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID()) {
2537 // If this is an intrinsic that directly corresponds to a GCC
2538 // builtin, we emit it here.
2539 const char *BuiltinName = "";
2540 #define GET_GCC_BUILTIN_NAME
2541 #include "llvm/Intrinsics.gen"
2542 #undef GET_GCC_BUILTIN_NAME
2543 assert(BuiltinName[0] && "Unknown LLVM intrinsic!");
2549 case Intrinsic::vastart:
2552 Out << "va_start(*(va_list*)";
2553 writeOperand(I.getOperand(1));
2555 // Output the last argument to the enclosing function...
2556 if (I.getParent()->getParent()->arg_empty()) {
2557 cerr << "The C backend does not currently support zero "
2558 << "argument varargs functions, such as '"
2559 << I.getParent()->getParent()->getName() << "'!\n";
2562 writeOperand(--I.getParent()->getParent()->arg_end());
2565 case Intrinsic::vaend:
2566 if (!isa<ConstantPointerNull>(I.getOperand(1))) {
2567 Out << "0; va_end(*(va_list*)";
2568 writeOperand(I.getOperand(1));
2571 Out << "va_end(*(va_list*)0)";
2574 case Intrinsic::vacopy:
2576 Out << "va_copy(*(va_list*)";
2577 writeOperand(I.getOperand(1));
2578 Out << ", *(va_list*)";
2579 writeOperand(I.getOperand(2));
2582 case Intrinsic::returnaddress:
2583 Out << "__builtin_return_address(";
2584 writeOperand(I.getOperand(1));
2587 case Intrinsic::frameaddress:
2588 Out << "__builtin_frame_address(";
2589 writeOperand(I.getOperand(1));
2592 case Intrinsic::powi_f32:
2593 case Intrinsic::powi_f64:
2594 Out << "__builtin_powi(";
2595 writeOperand(I.getOperand(1));
2597 writeOperand(I.getOperand(2));
2600 case Intrinsic::setjmp:
2601 Out << "setjmp(*(jmp_buf*)";
2602 writeOperand(I.getOperand(1));
2605 case Intrinsic::longjmp:
2606 Out << "longjmp(*(jmp_buf*)";
2607 writeOperand(I.getOperand(1));
2609 writeOperand(I.getOperand(2));
2612 case Intrinsic::prefetch:
2613 Out << "LLVM_PREFETCH((const void *)";
2614 writeOperand(I.getOperand(1));
2616 writeOperand(I.getOperand(2));
2618 writeOperand(I.getOperand(3));
2621 case Intrinsic::dbg_stoppoint: {
2622 // If we use writeOperand directly we get a "u" suffix which is rejected
2624 DbgStopPointInst &SPI = cast<DbgStopPointInst>(I);
2628 << " \"" << SPI.getDirectory()
2629 << SPI.getFileName() << "\"\n";
2635 Value *Callee = I.getCalledValue();
2637 const PointerType *PTy = cast<PointerType>(Callee->getType());
2638 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
2640 // If this is a call to a struct-return function, assign to the first
2641 // parameter instead of passing it to the call.
2642 bool isStructRet = FTy->isStructReturn();
2645 writeOperand(I.getOperand(1));
2649 if (I.isTailCall()) Out << " /*tail*/ ";
2652 // If this is an indirect call to a struct return function, we need to cast
2654 bool NeedsCast = isStructRet && !isa<Function>(Callee);
2656 // GCC is a real PITA. It does not permit codegening casts of functions to
2657 // function pointers if they are in a call (it generates a trap instruction
2658 // instead!). We work around this by inserting a cast to void* in between
2659 // the function and the function pointer cast. Unfortunately, we can't just
2660 // form the constant expression here, because the folder will immediately
2663 // Note finally, that this is completely unsafe. ANSI C does not guarantee
2664 // that void* and function pointers have the same size. :( To deal with this
2665 // in the common case, we handle casts where the number of arguments passed
2668 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Callee))
2670 if (Function *RF = dyn_cast<Function>(CE->getOperand(0))) {
2676 // Ok, just cast the pointer type.
2679 printType(Out, I.getCalledValue()->getType());
2681 printStructReturnPointerFunctionType(Out,
2682 cast<PointerType>(I.getCalledValue()->getType()));
2685 writeOperand(Callee);
2686 if (NeedsCast) Out << ')';
2691 unsigned NumDeclaredParams = FTy->getNumParams();
2693 CallSite::arg_iterator AI = I.op_begin()+1, AE = I.op_end();
2695 if (isStructRet) { // Skip struct return argument.
2700 const ParamAttrsList *Attrs = FTy->getParamAttrs();
2701 bool PrintedArg = false;
2703 for (; AI != AE; ++AI, ++ArgNo, ++Idx) {
2704 if (PrintedArg) Out << ", ";
2705 if (ArgNo < NumDeclaredParams &&
2706 (*AI)->getType() != FTy->getParamType(ArgNo)) {
2708 printType(Out, FTy->getParamType(ArgNo),
2709 /*isSigned=*/Attrs && Attrs->paramHasAttr(Idx, ParamAttr::SExt));
2719 //This converts the llvm constraint string to something gcc is expecting.
2720 //TODO: work out platform independent constraints and factor those out
2721 // of the per target tables
2722 // handle multiple constraint codes
2723 std::string CWriter::InterpretASMConstraint(InlineAsm::ConstraintInfo& c) {
2725 assert(c.Codes.size() == 1 && "Too many asm constraint codes to handle");
2727 const char** table = 0;
2729 //Grab the translation table from TargetAsmInfo if it exists
2732 const TargetMachineRegistry::Entry* Match =
2733 TargetMachineRegistry::getClosestStaticTargetForModule(*TheModule, E);
2735 //Per platform Target Machines don't exist, so create it
2736 // this must be done only once
2737 const TargetMachine* TM = Match->CtorFn(*TheModule, "");
2738 TAsm = TM->getTargetAsmInfo();
2742 table = TAsm->getAsmCBE();
2744 //Search the translation table if it exists
2745 for (int i = 0; table && table[i]; i += 2)
2746 if (c.Codes[0] == table[i])
2749 //default is identity
2753 //TODO: import logic from AsmPrinter.cpp
2754 static std::string gccifyAsm(std::string asmstr) {
2755 for (std::string::size_type i = 0; i != asmstr.size(); ++i)
2756 if (asmstr[i] == '\n')
2757 asmstr.replace(i, 1, "\\n");
2758 else if (asmstr[i] == '\t')
2759 asmstr.replace(i, 1, "\\t");
2760 else if (asmstr[i] == '$') {
2761 if (asmstr[i + 1] == '{') {
2762 std::string::size_type a = asmstr.find_first_of(':', i + 1);
2763 std::string::size_type b = asmstr.find_first_of('}', i + 1);
2764 std::string n = "%" +
2765 asmstr.substr(a + 1, b - a - 1) +
2766 asmstr.substr(i + 2, a - i - 2);
2767 asmstr.replace(i, b - i + 1, n);
2770 asmstr.replace(i, 1, "%");
2772 else if (asmstr[i] == '%')//grr
2773 { asmstr.replace(i, 1, "%%"); ++i;}
2778 //TODO: assumptions about what consume arguments from the call are likely wrong
2779 // handle communitivity
2780 void CWriter::visitInlineAsm(CallInst &CI) {
2781 InlineAsm* as = cast<InlineAsm>(CI.getOperand(0));
2782 std::vector<InlineAsm::ConstraintInfo> Constraints = as->ParseConstraints();
2783 std::vector<std::pair<std::string, Value*> > Input;
2784 std::vector<std::pair<std::string, Value*> > Output;
2785 std::string Clobber;
2786 int count = CI.getType() == Type::VoidTy ? 1 : 0;
2787 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
2788 E = Constraints.end(); I != E; ++I) {
2789 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
2791 InterpretASMConstraint(*I);
2794 assert(0 && "Unknown asm constraint");
2796 case InlineAsm::isInput: {
2798 Input.push_back(std::make_pair(c, count ? CI.getOperand(count) : &CI));
2799 ++count; //consume arg
2803 case InlineAsm::isOutput: {
2805 Output.push_back(std::make_pair("="+((I->isEarlyClobber ? "&" : "")+c),
2806 count ? CI.getOperand(count) : &CI));
2807 ++count; //consume arg
2811 case InlineAsm::isClobber: {
2813 Clobber += ",\"" + c + "\"";
2819 //fix up the asm string for gcc
2820 std::string asmstr = gccifyAsm(as->getAsmString());
2822 Out << "__asm__ volatile (\"" << asmstr << "\"\n";
2824 for (std::vector<std::pair<std::string, Value*> >::iterator I = Output.begin(),
2825 E = Output.end(); I != E; ++I) {
2826 Out << "\"" << I->first << "\"(";
2827 writeOperandRaw(I->second);
2833 for (std::vector<std::pair<std::string, Value*> >::iterator I = Input.begin(),
2834 E = Input.end(); I != E; ++I) {
2835 Out << "\"" << I->first << "\"(";
2836 writeOperandRaw(I->second);
2842 Out << "\n :" << Clobber.substr(1);
2846 void CWriter::visitMallocInst(MallocInst &I) {
2847 assert(0 && "lowerallocations pass didn't work!");
2850 void CWriter::visitAllocaInst(AllocaInst &I) {
2852 printType(Out, I.getType());
2853 Out << ") alloca(sizeof(";
2854 printType(Out, I.getType()->getElementType());
2856 if (I.isArrayAllocation()) {
2858 writeOperand(I.getOperand(0));
2863 void CWriter::visitFreeInst(FreeInst &I) {
2864 assert(0 && "lowerallocations pass didn't work!");
2867 void CWriter::printIndexingExpression(Value *Ptr, gep_type_iterator I,
2868 gep_type_iterator E) {
2869 bool HasImplicitAddress = false;
2870 // If accessing a global value with no indexing, avoid *(&GV) syndrome
2871 if (isa<GlobalValue>(Ptr)) {
2872 HasImplicitAddress = true;
2873 } else if (isDirectAlloca(Ptr)) {
2874 HasImplicitAddress = true;
2878 if (!HasImplicitAddress)
2879 Out << '*'; // Implicit zero first argument: '*x' is equivalent to 'x[0]'
2881 writeOperandInternal(Ptr);
2885 const Constant *CI = dyn_cast<Constant>(I.getOperand());
2886 if (HasImplicitAddress && (!CI || !CI->isNullValue()))
2889 writeOperandInternal(Ptr);
2891 if (HasImplicitAddress && (!CI || !CI->isNullValue())) {
2893 HasImplicitAddress = false; // HIA is only true if we haven't addressed yet
2896 assert(!HasImplicitAddress || (CI && CI->isNullValue()) &&
2897 "Can only have implicit address with direct accessing");
2899 if (HasImplicitAddress) {
2901 } else if (CI && CI->isNullValue()) {
2902 gep_type_iterator TmpI = I; ++TmpI;
2904 // Print out the -> operator if possible...
2905 if (TmpI != E && isa<StructType>(*TmpI)) {
2906 Out << (HasImplicitAddress ? "." : "->");
2907 Out << "field" << cast<ConstantInt>(TmpI.getOperand())->getZExtValue();
2913 if (isa<StructType>(*I)) {
2914 Out << ".field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
2917 writeOperand(I.getOperand());
2922 void CWriter::visitLoadInst(LoadInst &I) {
2924 if (I.isVolatile()) {
2926 printType(Out, I.getType(), false, "volatile*");
2930 writeOperand(I.getOperand(0));
2936 void CWriter::visitStoreInst(StoreInst &I) {
2938 if (I.isVolatile()) {
2940 printType(Out, I.getOperand(0)->getType(), false, " volatile*");
2943 writeOperand(I.getPointerOperand());
2944 if (I.isVolatile()) Out << ')';
2946 Value *Operand = I.getOperand(0);
2947 Constant *BitMask = 0;
2948 if (const IntegerType* ITy = dyn_cast<IntegerType>(Operand->getType()))
2949 if (!ITy->isPowerOf2ByteWidth())
2950 // We have a bit width that doesn't match an even power-of-2 byte
2951 // size. Consequently we must & the value with the type's bit mask
2952 BitMask = ConstantInt::get(ITy, ITy->getBitMask());
2955 writeOperand(Operand);
2958 printConstant(BitMask);
2963 void CWriter::visitGetElementPtrInst(GetElementPtrInst &I) {
2965 printIndexingExpression(I.getPointerOperand(), gep_type_begin(I),
2969 void CWriter::visitVAArgInst(VAArgInst &I) {
2970 Out << "va_arg(*(va_list*)";
2971 writeOperand(I.getOperand(0));
2973 printType(Out, I.getType());
2977 //===----------------------------------------------------------------------===//
2978 // External Interface declaration
2979 //===----------------------------------------------------------------------===//
2981 bool CTargetMachine::addPassesToEmitWholeFile(PassManager &PM,
2983 CodeGenFileType FileType,
2985 if (FileType != TargetMachine::AssemblyFile) return true;
2987 PM.add(createLowerGCPass());
2988 PM.add(createLowerAllocationsPass(true));
2989 PM.add(createLowerInvokePass());
2990 PM.add(createCFGSimplificationPass()); // clean up after lower invoke.
2991 PM.add(new CBackendNameAllUsedStructsAndMergeFunctions());
2992 PM.add(new CWriter(o));