1 //===-- CBackend.cpp - Library for converting LLVM code to C --------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 // This library converts LLVM code to C code, compilable by GCC and other C
13 //===----------------------------------------------------------------------===//
15 #include "CTargetMachine.h"
16 #include "llvm/CallingConv.h"
17 #include "llvm/Constants.h"
18 #include "llvm/DerivedTypes.h"
19 #include "llvm/Module.h"
20 #include "llvm/Instructions.h"
21 #include "llvm/Pass.h"
22 #include "llvm/PassManager.h"
23 #include "llvm/TypeSymbolTable.h"
24 #include "llvm/Intrinsics.h"
25 #include "llvm/IntrinsicInst.h"
26 #include "llvm/InlineAsm.h"
27 #include "llvm/Analysis/ConstantsScanner.h"
28 #include "llvm/Analysis/FindUsedTypes.h"
29 #include "llvm/Analysis/LoopInfo.h"
30 #include "llvm/CodeGen/Passes.h"
31 #include "llvm/CodeGen/IntrinsicLowering.h"
32 #include "llvm/Transforms/Scalar.h"
33 #include "llvm/Target/TargetAsmInfo.h"
34 #include "llvm/Target/TargetData.h"
35 #include "llvm/Target/TargetRegistry.h"
36 #include "llvm/Support/CallSite.h"
37 #include "llvm/Support/CFG.h"
38 #include "llvm/Support/ErrorHandling.h"
39 #include "llvm/Support/FormattedStream.h"
40 #include "llvm/Support/GetElementPtrTypeIterator.h"
41 #include "llvm/Support/InstVisitor.h"
42 #include "llvm/Support/Mangler.h"
43 #include "llvm/Support/MathExtras.h"
44 #include "llvm/ADT/StringExtras.h"
45 #include "llvm/ADT/STLExtras.h"
46 #include "llvm/Support/MathExtras.h"
47 #include "llvm/Config/config.h"
52 extern "C" void LLVMInitializeCBackendTarget() {
53 // Register the target.
54 RegisterTargetMachine<CTargetMachine> X(TheCBackendTarget);
58 /// CBackendNameAllUsedStructsAndMergeFunctions - This pass inserts names for
59 /// any unnamed structure types that are used by the program, and merges
60 /// external functions with the same name.
62 class CBackendNameAllUsedStructsAndMergeFunctions : public ModulePass {
65 CBackendNameAllUsedStructsAndMergeFunctions()
67 void getAnalysisUsage(AnalysisUsage &AU) const {
68 AU.addRequired<FindUsedTypes>();
71 virtual const char *getPassName() const {
72 return "C backend type canonicalizer";
75 virtual bool runOnModule(Module &M);
78 char CBackendNameAllUsedStructsAndMergeFunctions::ID = 0;
80 /// CWriter - This class is the main chunk of code that converts an LLVM
81 /// module to a C translation unit.
82 class CWriter : public FunctionPass, public InstVisitor<CWriter> {
83 formatted_raw_ostream &Out;
84 IntrinsicLowering *IL;
87 const Module *TheModule;
88 const TargetAsmInfo* TAsm;
90 std::map<const Type *, std::string> TypeNames;
91 std::map<const ConstantFP *, unsigned> FPConstantMap;
92 std::set<Function*> intrinsicPrototypesAlreadyGenerated;
93 std::set<const Argument*> ByValParams;
95 unsigned OpaqueCounter;
96 DenseMap<const Value*, unsigned> AnonValueNumbers;
97 unsigned NextAnonValueNumber;
101 explicit CWriter(formatted_raw_ostream &o)
102 : FunctionPass(&ID), Out(o), IL(0), Mang(0), LI(0),
103 TheModule(0), TAsm(0), TD(0), OpaqueCounter(0), NextAnonValueNumber(0) {
107 virtual const char *getPassName() const { return "C backend"; }
109 void getAnalysisUsage(AnalysisUsage &AU) const {
110 AU.addRequired<LoopInfo>();
111 AU.setPreservesAll();
114 virtual bool doInitialization(Module &M);
116 bool runOnFunction(Function &F) {
117 // Do not codegen any 'available_externally' functions at all, they have
118 // definitions outside the translation unit.
119 if (F.hasAvailableExternallyLinkage())
122 LI = &getAnalysis<LoopInfo>();
124 // Get rid of intrinsics we can't handle.
127 // Output all floating point constants that cannot be printed accurately.
128 printFloatingPointConstants(F);
134 virtual bool doFinalization(Module &M) {
139 FPConstantMap.clear();
142 intrinsicPrototypesAlreadyGenerated.clear();
146 raw_ostream &printType(formatted_raw_ostream &Out,
148 bool isSigned = false,
149 const std::string &VariableName = "",
150 bool IgnoreName = false,
151 const AttrListPtr &PAL = AttrListPtr());
152 std::ostream &printType(std::ostream &Out, const Type *Ty,
153 bool isSigned = false,
154 const std::string &VariableName = "",
155 bool IgnoreName = false,
156 const AttrListPtr &PAL = AttrListPtr());
157 raw_ostream &printSimpleType(formatted_raw_ostream &Out,
160 const std::string &NameSoFar = "");
161 std::ostream &printSimpleType(std::ostream &Out, const Type *Ty,
163 const std::string &NameSoFar = "");
165 void printStructReturnPointerFunctionType(formatted_raw_ostream &Out,
166 const AttrListPtr &PAL,
167 const PointerType *Ty);
169 /// writeOperandDeref - Print the result of dereferencing the specified
170 /// operand with '*'. This is equivalent to printing '*' then using
171 /// writeOperand, but avoids excess syntax in some cases.
172 void writeOperandDeref(Value *Operand) {
173 if (isAddressExposed(Operand)) {
174 // Already something with an address exposed.
175 writeOperandInternal(Operand);
178 writeOperand(Operand);
183 void writeOperand(Value *Operand, bool Static = false);
184 void writeInstComputationInline(Instruction &I);
185 void writeOperandInternal(Value *Operand, bool Static = false);
186 void writeOperandWithCast(Value* Operand, unsigned Opcode);
187 void writeOperandWithCast(Value* Operand, const ICmpInst &I);
188 bool writeInstructionCast(const Instruction &I);
190 void writeMemoryAccess(Value *Operand, const Type *OperandType,
191 bool IsVolatile, unsigned Alignment);
194 std::string InterpretASMConstraint(InlineAsm::ConstraintInfo& c);
196 void lowerIntrinsics(Function &F);
198 void printModule(Module *M);
199 void printModuleTypes(const TypeSymbolTable &ST);
200 void printContainedStructs(const Type *Ty, std::set<const Type *> &);
201 void printFloatingPointConstants(Function &F);
202 void printFloatingPointConstants(const Constant *C);
203 void printFunctionSignature(const Function *F, bool Prototype);
205 void printFunction(Function &);
206 void printBasicBlock(BasicBlock *BB);
207 void printLoop(Loop *L);
209 void printCast(unsigned opcode, const Type *SrcTy, const Type *DstTy);
210 void printConstant(Constant *CPV, bool Static);
211 void printConstantWithCast(Constant *CPV, unsigned Opcode);
212 bool printConstExprCast(const ConstantExpr *CE, bool Static);
213 void printConstantArray(ConstantArray *CPA, bool Static);
214 void printConstantVector(ConstantVector *CV, bool Static);
216 /// isAddressExposed - Return true if the specified value's name needs to
217 /// have its address taken in order to get a C value of the correct type.
218 /// This happens for global variables, byval parameters, and direct allocas.
219 bool isAddressExposed(const Value *V) const {
220 if (const Argument *A = dyn_cast<Argument>(V))
221 return ByValParams.count(A);
222 return isa<GlobalVariable>(V) || isDirectAlloca(V);
225 // isInlinableInst - Attempt to inline instructions into their uses to build
226 // trees as much as possible. To do this, we have to consistently decide
227 // what is acceptable to inline, so that variable declarations don't get
228 // printed and an extra copy of the expr is not emitted.
230 static bool isInlinableInst(const Instruction &I) {
231 // Always inline cmp instructions, even if they are shared by multiple
232 // expressions. GCC generates horrible code if we don't.
236 // Must be an expression, must be used exactly once. If it is dead, we
237 // emit it inline where it would go.
238 if (I.getType() == Type::VoidTy || !I.hasOneUse() ||
239 isa<TerminatorInst>(I) || isa<CallInst>(I) || isa<PHINode>(I) ||
240 isa<LoadInst>(I) || isa<VAArgInst>(I) || isa<InsertElementInst>(I) ||
241 isa<InsertValueInst>(I))
242 // Don't inline a load across a store or other bad things!
245 // Must not be used in inline asm, extractelement, or shufflevector.
247 const Instruction &User = cast<Instruction>(*I.use_back());
248 if (isInlineAsm(User) || isa<ExtractElementInst>(User) ||
249 isa<ShuffleVectorInst>(User))
253 // Only inline instruction it if it's use is in the same BB as the inst.
254 return I.getParent() == cast<Instruction>(I.use_back())->getParent();
257 // isDirectAlloca - Define fixed sized allocas in the entry block as direct
258 // variables which are accessed with the & operator. This causes GCC to
259 // generate significantly better code than to emit alloca calls directly.
261 static const AllocaInst *isDirectAlloca(const Value *V) {
262 const AllocaInst *AI = dyn_cast<AllocaInst>(V);
263 if (!AI) return false;
264 if (AI->isArrayAllocation())
265 return 0; // FIXME: we can also inline fixed size array allocas!
266 if (AI->getParent() != &AI->getParent()->getParent()->getEntryBlock())
271 // isInlineAsm - Check if the instruction is a call to an inline asm chunk
272 static bool isInlineAsm(const Instruction& I) {
273 if (isa<CallInst>(&I) && isa<InlineAsm>(I.getOperand(0)))
278 // Instruction visitation functions
279 friend class InstVisitor<CWriter>;
281 void visitReturnInst(ReturnInst &I);
282 void visitBranchInst(BranchInst &I);
283 void visitSwitchInst(SwitchInst &I);
284 void visitInvokeInst(InvokeInst &I) {
285 llvm_unreachable("Lowerinvoke pass didn't work!");
288 void visitUnwindInst(UnwindInst &I) {
289 llvm_unreachable("Lowerinvoke pass didn't work!");
291 void visitUnreachableInst(UnreachableInst &I);
293 void visitPHINode(PHINode &I);
294 void visitBinaryOperator(Instruction &I);
295 void visitICmpInst(ICmpInst &I);
296 void visitFCmpInst(FCmpInst &I);
298 void visitCastInst (CastInst &I);
299 void visitSelectInst(SelectInst &I);
300 void visitCallInst (CallInst &I);
301 void visitInlineAsm(CallInst &I);
302 bool visitBuiltinCall(CallInst &I, Intrinsic::ID ID, bool &WroteCallee);
304 void visitMallocInst(MallocInst &I);
305 void visitAllocaInst(AllocaInst &I);
306 void visitFreeInst (FreeInst &I);
307 void visitLoadInst (LoadInst &I);
308 void visitStoreInst (StoreInst &I);
309 void visitGetElementPtrInst(GetElementPtrInst &I);
310 void visitVAArgInst (VAArgInst &I);
312 void visitInsertElementInst(InsertElementInst &I);
313 void visitExtractElementInst(ExtractElementInst &I);
314 void visitShuffleVectorInst(ShuffleVectorInst &SVI);
316 void visitInsertValueInst(InsertValueInst &I);
317 void visitExtractValueInst(ExtractValueInst &I);
319 void visitInstruction(Instruction &I) {
321 cerr << "C Writer does not know about " << I;
326 void outputLValue(Instruction *I) {
327 Out << " " << GetValueName(I) << " = ";
330 bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To);
331 void printPHICopiesForSuccessor(BasicBlock *CurBlock,
332 BasicBlock *Successor, unsigned Indent);
333 void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
335 void printGEPExpression(Value *Ptr, gep_type_iterator I,
336 gep_type_iterator E, bool Static);
338 std::string GetValueName(const Value *Operand);
342 char CWriter::ID = 0;
344 /// This method inserts names for any unnamed structure types that are used by
345 /// the program, and removes names from structure types that are not used by the
348 bool CBackendNameAllUsedStructsAndMergeFunctions::runOnModule(Module &M) {
349 // Get a set of types that are used by the program...
350 std::set<const Type *> UT = getAnalysis<FindUsedTypes>().getTypes();
352 // Loop over the module symbol table, removing types from UT that are
353 // already named, and removing names for types that are not used.
355 TypeSymbolTable &TST = M.getTypeSymbolTable();
356 for (TypeSymbolTable::iterator TI = TST.begin(), TE = TST.end();
358 TypeSymbolTable::iterator I = TI++;
360 // If this isn't a struct or array type, remove it from our set of types
361 // to name. This simplifies emission later.
362 if (!isa<StructType>(I->second) && !isa<OpaqueType>(I->second) &&
363 !isa<ArrayType>(I->second)) {
366 // If this is not used, remove it from the symbol table.
367 std::set<const Type *>::iterator UTI = UT.find(I->second);
371 UT.erase(UTI); // Only keep one name for this type.
375 // UT now contains types that are not named. Loop over it, naming
378 bool Changed = false;
379 unsigned RenameCounter = 0;
380 for (std::set<const Type *>::const_iterator I = UT.begin(), E = UT.end();
382 if (isa<StructType>(*I) || isa<ArrayType>(*I)) {
383 while (M.addTypeName("unnamed"+utostr(RenameCounter), *I))
389 // Loop over all external functions and globals. If we have two with
390 // identical names, merge them.
391 // FIXME: This code should disappear when we don't allow values with the same
392 // names when they have different types!
393 std::map<std::string, GlobalValue*> ExtSymbols;
394 for (Module::iterator I = M.begin(), E = M.end(); I != E;) {
396 if (GV->isDeclaration() && GV->hasName()) {
397 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
398 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
400 // Found a conflict, replace this global with the previous one.
401 GlobalValue *OldGV = X.first->second;
402 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
403 GV->eraseFromParent();
408 // Do the same for globals.
409 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
411 GlobalVariable *GV = I++;
412 if (GV->isDeclaration() && GV->hasName()) {
413 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
414 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
416 // Found a conflict, replace this global with the previous one.
417 GlobalValue *OldGV = X.first->second;
418 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
419 GV->eraseFromParent();
428 /// printStructReturnPointerFunctionType - This is like printType for a struct
429 /// return type, except, instead of printing the type as void (*)(Struct*, ...)
430 /// print it as "Struct (*)(...)", for struct return functions.
431 void CWriter::printStructReturnPointerFunctionType(formatted_raw_ostream &Out,
432 const AttrListPtr &PAL,
433 const PointerType *TheTy) {
434 const FunctionType *FTy = cast<FunctionType>(TheTy->getElementType());
435 std::stringstream FunctionInnards;
436 FunctionInnards << " (*) (";
437 bool PrintedType = false;
439 FunctionType::param_iterator I = FTy->param_begin(), E = FTy->param_end();
440 const Type *RetTy = cast<PointerType>(I->get())->getElementType();
442 for (++I, ++Idx; I != E; ++I, ++Idx) {
444 FunctionInnards << ", ";
445 const Type *ArgTy = *I;
446 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
447 assert(isa<PointerType>(ArgTy));
448 ArgTy = cast<PointerType>(ArgTy)->getElementType();
450 printType(FunctionInnards, ArgTy,
451 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
454 if (FTy->isVarArg()) {
456 FunctionInnards << ", ...";
457 } else if (!PrintedType) {
458 FunctionInnards << "void";
460 FunctionInnards << ')';
461 std::string tstr = FunctionInnards.str();
462 printType(Out, RetTy,
463 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
467 CWriter::printSimpleType(formatted_raw_ostream &Out, const Type *Ty,
469 const std::string &NameSoFar) {
470 assert((Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) &&
471 "Invalid type for printSimpleType");
472 switch (Ty->getTypeID()) {
473 case Type::VoidTyID: return Out << "void " << NameSoFar;
474 case Type::IntegerTyID: {
475 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
477 return Out << "bool " << NameSoFar;
478 else if (NumBits <= 8)
479 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
480 else if (NumBits <= 16)
481 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
482 else if (NumBits <= 32)
483 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
484 else if (NumBits <= 64)
485 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
487 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
488 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
491 case Type::FloatTyID: return Out << "float " << NameSoFar;
492 case Type::DoubleTyID: return Out << "double " << NameSoFar;
493 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
494 // present matches host 'long double'.
495 case Type::X86_FP80TyID:
496 case Type::PPC_FP128TyID:
497 case Type::FP128TyID: return Out << "long double " << NameSoFar;
499 case Type::VectorTyID: {
500 const VectorType *VTy = cast<VectorType>(Ty);
501 return printSimpleType(Out, VTy->getElementType(), isSigned,
502 " __attribute__((vector_size(" +
503 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
508 cerr << "Unknown primitive type: " << *Ty << "\n";
515 CWriter::printSimpleType(std::ostream &Out, const Type *Ty, bool isSigned,
516 const std::string &NameSoFar) {
517 assert((Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) &&
518 "Invalid type for printSimpleType");
519 switch (Ty->getTypeID()) {
520 case Type::VoidTyID: return Out << "void " << NameSoFar;
521 case Type::IntegerTyID: {
522 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
524 return Out << "bool " << NameSoFar;
525 else if (NumBits <= 8)
526 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
527 else if (NumBits <= 16)
528 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
529 else if (NumBits <= 32)
530 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
531 else if (NumBits <= 64)
532 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
534 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
535 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
538 case Type::FloatTyID: return Out << "float " << NameSoFar;
539 case Type::DoubleTyID: return Out << "double " << NameSoFar;
540 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
541 // present matches host 'long double'.
542 case Type::X86_FP80TyID:
543 case Type::PPC_FP128TyID:
544 case Type::FP128TyID: return Out << "long double " << NameSoFar;
546 case Type::VectorTyID: {
547 const VectorType *VTy = cast<VectorType>(Ty);
548 return printSimpleType(Out, VTy->getElementType(), isSigned,
549 " __attribute__((vector_size(" +
550 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
555 cerr << "Unknown primitive type: " << *Ty << "\n";
561 // Pass the Type* and the variable name and this prints out the variable
564 raw_ostream &CWriter::printType(formatted_raw_ostream &Out,
566 bool isSigned, const std::string &NameSoFar,
567 bool IgnoreName, const AttrListPtr &PAL) {
568 if (Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) {
569 printSimpleType(Out, Ty, isSigned, NameSoFar);
573 // Check to see if the type is named.
574 if (!IgnoreName || isa<OpaqueType>(Ty)) {
575 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
576 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
579 switch (Ty->getTypeID()) {
580 case Type::FunctionTyID: {
581 const FunctionType *FTy = cast<FunctionType>(Ty);
582 std::stringstream FunctionInnards;
583 FunctionInnards << " (" << NameSoFar << ") (";
585 for (FunctionType::param_iterator I = FTy->param_begin(),
586 E = FTy->param_end(); I != E; ++I) {
587 const Type *ArgTy = *I;
588 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
589 assert(isa<PointerType>(ArgTy));
590 ArgTy = cast<PointerType>(ArgTy)->getElementType();
592 if (I != FTy->param_begin())
593 FunctionInnards << ", ";
594 printType(FunctionInnards, ArgTy,
595 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
598 if (FTy->isVarArg()) {
599 if (FTy->getNumParams())
600 FunctionInnards << ", ...";
601 } else if (!FTy->getNumParams()) {
602 FunctionInnards << "void";
604 FunctionInnards << ')';
605 std::string tstr = FunctionInnards.str();
606 printType(Out, FTy->getReturnType(),
607 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
610 case Type::StructTyID: {
611 const StructType *STy = cast<StructType>(Ty);
612 Out << NameSoFar + " {\n";
614 for (StructType::element_iterator I = STy->element_begin(),
615 E = STy->element_end(); I != E; ++I) {
617 printType(Out, *I, false, "field" + utostr(Idx++));
622 Out << " __attribute__ ((packed))";
626 case Type::PointerTyID: {
627 const PointerType *PTy = cast<PointerType>(Ty);
628 std::string ptrName = "*" + NameSoFar;
630 if (isa<ArrayType>(PTy->getElementType()) ||
631 isa<VectorType>(PTy->getElementType()))
632 ptrName = "(" + ptrName + ")";
635 // Must be a function ptr cast!
636 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
637 return printType(Out, PTy->getElementType(), false, ptrName);
640 case Type::ArrayTyID: {
641 const ArrayType *ATy = cast<ArrayType>(Ty);
642 unsigned NumElements = ATy->getNumElements();
643 if (NumElements == 0) NumElements = 1;
644 // Arrays are wrapped in structs to allow them to have normal
645 // value semantics (avoiding the array "decay").
646 Out << NameSoFar << " { ";
647 printType(Out, ATy->getElementType(), false,
648 "array[" + utostr(NumElements) + "]");
652 case Type::OpaqueTyID: {
653 std::string TyName = "struct opaque_" + itostr(OpaqueCounter++);
654 assert(TypeNames.find(Ty) == TypeNames.end());
655 TypeNames[Ty] = TyName;
656 return Out << TyName << ' ' << NameSoFar;
659 llvm_unreachable("Unhandled case in getTypeProps!");
665 // Pass the Type* and the variable name and this prints out the variable
668 std::ostream &CWriter::printType(std::ostream &Out, const Type *Ty,
669 bool isSigned, const std::string &NameSoFar,
670 bool IgnoreName, const AttrListPtr &PAL) {
671 if (Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) {
672 printSimpleType(Out, Ty, isSigned, NameSoFar);
676 // Check to see if the type is named.
677 if (!IgnoreName || isa<OpaqueType>(Ty)) {
678 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
679 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
682 switch (Ty->getTypeID()) {
683 case Type::FunctionTyID: {
684 const FunctionType *FTy = cast<FunctionType>(Ty);
685 std::stringstream FunctionInnards;
686 FunctionInnards << " (" << NameSoFar << ") (";
688 for (FunctionType::param_iterator I = FTy->param_begin(),
689 E = FTy->param_end(); I != E; ++I) {
690 const Type *ArgTy = *I;
691 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
692 assert(isa<PointerType>(ArgTy));
693 ArgTy = cast<PointerType>(ArgTy)->getElementType();
695 if (I != FTy->param_begin())
696 FunctionInnards << ", ";
697 printType(FunctionInnards, ArgTy,
698 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
701 if (FTy->isVarArg()) {
702 if (FTy->getNumParams())
703 FunctionInnards << ", ...";
704 } else if (!FTy->getNumParams()) {
705 FunctionInnards << "void";
707 FunctionInnards << ')';
708 std::string tstr = FunctionInnards.str();
709 printType(Out, FTy->getReturnType(),
710 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
713 case Type::StructTyID: {
714 const StructType *STy = cast<StructType>(Ty);
715 Out << NameSoFar + " {\n";
717 for (StructType::element_iterator I = STy->element_begin(),
718 E = STy->element_end(); I != E; ++I) {
720 printType(Out, *I, false, "field" + utostr(Idx++));
725 Out << " __attribute__ ((packed))";
729 case Type::PointerTyID: {
730 const PointerType *PTy = cast<PointerType>(Ty);
731 std::string ptrName = "*" + NameSoFar;
733 if (isa<ArrayType>(PTy->getElementType()) ||
734 isa<VectorType>(PTy->getElementType()))
735 ptrName = "(" + ptrName + ")";
738 // Must be a function ptr cast!
739 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
740 return printType(Out, PTy->getElementType(), false, ptrName);
743 case Type::ArrayTyID: {
744 const ArrayType *ATy = cast<ArrayType>(Ty);
745 unsigned NumElements = ATy->getNumElements();
746 if (NumElements == 0) NumElements = 1;
747 // Arrays are wrapped in structs to allow them to have normal
748 // value semantics (avoiding the array "decay").
749 Out << NameSoFar << " { ";
750 printType(Out, ATy->getElementType(), false,
751 "array[" + utostr(NumElements) + "]");
755 case Type::OpaqueTyID: {
756 std::string TyName = "struct opaque_" + itostr(OpaqueCounter++);
757 assert(TypeNames.find(Ty) == TypeNames.end());
758 TypeNames[Ty] = TyName;
759 return Out << TyName << ' ' << NameSoFar;
762 llvm_unreachable("Unhandled case in getTypeProps!");
768 void CWriter::printConstantArray(ConstantArray *CPA, bool Static) {
770 // As a special case, print the array as a string if it is an array of
771 // ubytes or an array of sbytes with positive values.
773 const Type *ETy = CPA->getType()->getElementType();
774 bool isString = (ETy == Type::Int8Ty || ETy == Type::Int8Ty);
776 // Make sure the last character is a null char, as automatically added by C
777 if (isString && (CPA->getNumOperands() == 0 ||
778 !cast<Constant>(*(CPA->op_end()-1))->isNullValue()))
783 // Keep track of whether the last number was a hexadecimal escape
784 bool LastWasHex = false;
786 // Do not include the last character, which we know is null
787 for (unsigned i = 0, e = CPA->getNumOperands()-1; i != e; ++i) {
788 unsigned char C = cast<ConstantInt>(CPA->getOperand(i))->getZExtValue();
790 // Print it out literally if it is a printable character. The only thing
791 // to be careful about is when the last letter output was a hex escape
792 // code, in which case we have to be careful not to print out hex digits
793 // explicitly (the C compiler thinks it is a continuation of the previous
794 // character, sheesh...)
796 if (isprint(C) && (!LastWasHex || !isxdigit(C))) {
798 if (C == '"' || C == '\\')
799 Out << "\\" << (char)C;
805 case '\n': Out << "\\n"; break;
806 case '\t': Out << "\\t"; break;
807 case '\r': Out << "\\r"; break;
808 case '\v': Out << "\\v"; break;
809 case '\a': Out << "\\a"; break;
810 case '\"': Out << "\\\""; break;
811 case '\'': Out << "\\\'"; break;
814 Out << (char)(( C/16 < 10) ? ( C/16 +'0') : ( C/16 -10+'A'));
815 Out << (char)(((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A'));
824 if (CPA->getNumOperands()) {
826 printConstant(cast<Constant>(CPA->getOperand(0)), Static);
827 for (unsigned i = 1, e = CPA->getNumOperands(); i != e; ++i) {
829 printConstant(cast<Constant>(CPA->getOperand(i)), Static);
836 void CWriter::printConstantVector(ConstantVector *CP, bool Static) {
838 if (CP->getNumOperands()) {
840 printConstant(cast<Constant>(CP->getOperand(0)), Static);
841 for (unsigned i = 1, e = CP->getNumOperands(); i != e; ++i) {
843 printConstant(cast<Constant>(CP->getOperand(i)), Static);
849 // isFPCSafeToPrint - Returns true if we may assume that CFP may be written out
850 // textually as a double (rather than as a reference to a stack-allocated
851 // variable). We decide this by converting CFP to a string and back into a
852 // double, and then checking whether the conversion results in a bit-equal
853 // double to the original value of CFP. This depends on us and the target C
854 // compiler agreeing on the conversion process (which is pretty likely since we
855 // only deal in IEEE FP).
857 static bool isFPCSafeToPrint(const ConstantFP *CFP) {
859 // Do long doubles in hex for now.
860 if (CFP->getType() != Type::FloatTy && CFP->getType() != Type::DoubleTy)
862 APFloat APF = APFloat(CFP->getValueAPF()); // copy
863 if (CFP->getType() == Type::FloatTy)
864 APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &ignored);
865 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
867 sprintf(Buffer, "%a", APF.convertToDouble());
868 if (!strncmp(Buffer, "0x", 2) ||
869 !strncmp(Buffer, "-0x", 3) ||
870 !strncmp(Buffer, "+0x", 3))
871 return APF.bitwiseIsEqual(APFloat(atof(Buffer)));
874 std::string StrVal = ftostr(APF);
876 while (StrVal[0] == ' ')
877 StrVal.erase(StrVal.begin());
879 // Check to make sure that the stringized number is not some string like "Inf"
880 // or NaN. Check that the string matches the "[-+]?[0-9]" regex.
881 if ((StrVal[0] >= '0' && StrVal[0] <= '9') ||
882 ((StrVal[0] == '-' || StrVal[0] == '+') &&
883 (StrVal[1] >= '0' && StrVal[1] <= '9')))
884 // Reparse stringized version!
885 return APF.bitwiseIsEqual(APFloat(atof(StrVal.c_str())));
890 /// Print out the casting for a cast operation. This does the double casting
891 /// necessary for conversion to the destination type, if necessary.
892 /// @brief Print a cast
893 void CWriter::printCast(unsigned opc, const Type *SrcTy, const Type *DstTy) {
894 // Print the destination type cast
896 case Instruction::UIToFP:
897 case Instruction::SIToFP:
898 case Instruction::IntToPtr:
899 case Instruction::Trunc:
900 case Instruction::BitCast:
901 case Instruction::FPExt:
902 case Instruction::FPTrunc: // For these the DstTy sign doesn't matter
904 printType(Out, DstTy);
907 case Instruction::ZExt:
908 case Instruction::PtrToInt:
909 case Instruction::FPToUI: // For these, make sure we get an unsigned dest
911 printSimpleType(Out, DstTy, false);
914 case Instruction::SExt:
915 case Instruction::FPToSI: // For these, make sure we get a signed dest
917 printSimpleType(Out, DstTy, true);
921 llvm_unreachable("Invalid cast opcode");
924 // Print the source type cast
926 case Instruction::UIToFP:
927 case Instruction::ZExt:
929 printSimpleType(Out, SrcTy, false);
932 case Instruction::SIToFP:
933 case Instruction::SExt:
935 printSimpleType(Out, SrcTy, true);
938 case Instruction::IntToPtr:
939 case Instruction::PtrToInt:
940 // Avoid "cast to pointer from integer of different size" warnings
941 Out << "(unsigned long)";
943 case Instruction::Trunc:
944 case Instruction::BitCast:
945 case Instruction::FPExt:
946 case Instruction::FPTrunc:
947 case Instruction::FPToSI:
948 case Instruction::FPToUI:
949 break; // These don't need a source cast.
951 llvm_unreachable("Invalid cast opcode");
956 // printConstant - The LLVM Constant to C Constant converter.
957 void CWriter::printConstant(Constant *CPV, bool Static) {
958 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
959 switch (CE->getOpcode()) {
960 case Instruction::Trunc:
961 case Instruction::ZExt:
962 case Instruction::SExt:
963 case Instruction::FPTrunc:
964 case Instruction::FPExt:
965 case Instruction::UIToFP:
966 case Instruction::SIToFP:
967 case Instruction::FPToUI:
968 case Instruction::FPToSI:
969 case Instruction::PtrToInt:
970 case Instruction::IntToPtr:
971 case Instruction::BitCast:
973 printCast(CE->getOpcode(), CE->getOperand(0)->getType(), CE->getType());
974 if (CE->getOpcode() == Instruction::SExt &&
975 CE->getOperand(0)->getType() == Type::Int1Ty) {
976 // Make sure we really sext from bool here by subtracting from 0
979 printConstant(CE->getOperand(0), Static);
980 if (CE->getType() == Type::Int1Ty &&
981 (CE->getOpcode() == Instruction::Trunc ||
982 CE->getOpcode() == Instruction::FPToUI ||
983 CE->getOpcode() == Instruction::FPToSI ||
984 CE->getOpcode() == Instruction::PtrToInt)) {
985 // Make sure we really truncate to bool here by anding with 1
991 case Instruction::GetElementPtr:
993 printGEPExpression(CE->getOperand(0), gep_type_begin(CPV),
994 gep_type_end(CPV), Static);
997 case Instruction::Select:
999 printConstant(CE->getOperand(0), Static);
1001 printConstant(CE->getOperand(1), Static);
1003 printConstant(CE->getOperand(2), Static);
1006 case Instruction::Add:
1007 case Instruction::FAdd:
1008 case Instruction::Sub:
1009 case Instruction::FSub:
1010 case Instruction::Mul:
1011 case Instruction::FMul:
1012 case Instruction::SDiv:
1013 case Instruction::UDiv:
1014 case Instruction::FDiv:
1015 case Instruction::URem:
1016 case Instruction::SRem:
1017 case Instruction::FRem:
1018 case Instruction::And:
1019 case Instruction::Or:
1020 case Instruction::Xor:
1021 case Instruction::ICmp:
1022 case Instruction::Shl:
1023 case Instruction::LShr:
1024 case Instruction::AShr:
1027 bool NeedsClosingParens = printConstExprCast(CE, Static);
1028 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
1029 switch (CE->getOpcode()) {
1030 case Instruction::Add:
1031 case Instruction::FAdd: Out << " + "; break;
1032 case Instruction::Sub:
1033 case Instruction::FSub: Out << " - "; break;
1034 case Instruction::Mul:
1035 case Instruction::FMul: Out << " * "; break;
1036 case Instruction::URem:
1037 case Instruction::SRem:
1038 case Instruction::FRem: Out << " % "; break;
1039 case Instruction::UDiv:
1040 case Instruction::SDiv:
1041 case Instruction::FDiv: Out << " / "; break;
1042 case Instruction::And: Out << " & "; break;
1043 case Instruction::Or: Out << " | "; break;
1044 case Instruction::Xor: Out << " ^ "; break;
1045 case Instruction::Shl: Out << " << "; break;
1046 case Instruction::LShr:
1047 case Instruction::AShr: Out << " >> "; break;
1048 case Instruction::ICmp:
1049 switch (CE->getPredicate()) {
1050 case ICmpInst::ICMP_EQ: Out << " == "; break;
1051 case ICmpInst::ICMP_NE: Out << " != "; break;
1052 case ICmpInst::ICMP_SLT:
1053 case ICmpInst::ICMP_ULT: Out << " < "; break;
1054 case ICmpInst::ICMP_SLE:
1055 case ICmpInst::ICMP_ULE: Out << " <= "; break;
1056 case ICmpInst::ICMP_SGT:
1057 case ICmpInst::ICMP_UGT: Out << " > "; break;
1058 case ICmpInst::ICMP_SGE:
1059 case ICmpInst::ICMP_UGE: Out << " >= "; break;
1060 default: llvm_unreachable("Illegal ICmp predicate");
1063 default: llvm_unreachable("Illegal opcode here!");
1065 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
1066 if (NeedsClosingParens)
1071 case Instruction::FCmp: {
1073 bool NeedsClosingParens = printConstExprCast(CE, Static);
1074 if (CE->getPredicate() == FCmpInst::FCMP_FALSE)
1076 else if (CE->getPredicate() == FCmpInst::FCMP_TRUE)
1080 switch (CE->getPredicate()) {
1081 default: llvm_unreachable("Illegal FCmp predicate");
1082 case FCmpInst::FCMP_ORD: op = "ord"; break;
1083 case FCmpInst::FCMP_UNO: op = "uno"; break;
1084 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
1085 case FCmpInst::FCMP_UNE: op = "une"; break;
1086 case FCmpInst::FCMP_ULT: op = "ult"; break;
1087 case FCmpInst::FCMP_ULE: op = "ule"; break;
1088 case FCmpInst::FCMP_UGT: op = "ugt"; break;
1089 case FCmpInst::FCMP_UGE: op = "uge"; break;
1090 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
1091 case FCmpInst::FCMP_ONE: op = "one"; break;
1092 case FCmpInst::FCMP_OLT: op = "olt"; break;
1093 case FCmpInst::FCMP_OLE: op = "ole"; break;
1094 case FCmpInst::FCMP_OGT: op = "ogt"; break;
1095 case FCmpInst::FCMP_OGE: op = "oge"; break;
1097 Out << "llvm_fcmp_" << op << "(";
1098 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
1100 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
1103 if (NeedsClosingParens)
1110 cerr << "CWriter Error: Unhandled constant expression: "
1113 llvm_unreachable(0);
1115 } else if (isa<UndefValue>(CPV) && CPV->getType()->isSingleValueType()) {
1117 printType(Out, CPV->getType()); // sign doesn't matter
1118 Out << ")/*UNDEF*/";
1119 if (!isa<VectorType>(CPV->getType())) {
1127 if (ConstantInt *CI = dyn_cast<ConstantInt>(CPV)) {
1128 const Type* Ty = CI->getType();
1129 if (Ty == Type::Int1Ty)
1130 Out << (CI->getZExtValue() ? '1' : '0');
1131 else if (Ty == Type::Int32Ty)
1132 Out << CI->getZExtValue() << 'u';
1133 else if (Ty->getPrimitiveSizeInBits() > 32)
1134 Out << CI->getZExtValue() << "ull";
1137 printSimpleType(Out, Ty, false) << ')';
1138 if (CI->isMinValue(true))
1139 Out << CI->getZExtValue() << 'u';
1141 Out << CI->getSExtValue();
1147 switch (CPV->getType()->getTypeID()) {
1148 case Type::FloatTyID:
1149 case Type::DoubleTyID:
1150 case Type::X86_FP80TyID:
1151 case Type::PPC_FP128TyID:
1152 case Type::FP128TyID: {
1153 ConstantFP *FPC = cast<ConstantFP>(CPV);
1154 std::map<const ConstantFP*, unsigned>::iterator I = FPConstantMap.find(FPC);
1155 if (I != FPConstantMap.end()) {
1156 // Because of FP precision problems we must load from a stack allocated
1157 // value that holds the value in hex.
1158 Out << "(*(" << (FPC->getType() == Type::FloatTy ? "float" :
1159 FPC->getType() == Type::DoubleTy ? "double" :
1161 << "*)&FPConstant" << I->second << ')';
1164 if (FPC->getType() == Type::FloatTy)
1165 V = FPC->getValueAPF().convertToFloat();
1166 else if (FPC->getType() == Type::DoubleTy)
1167 V = FPC->getValueAPF().convertToDouble();
1169 // Long double. Convert the number to double, discarding precision.
1170 // This is not awesome, but it at least makes the CBE output somewhat
1172 APFloat Tmp = FPC->getValueAPF();
1174 Tmp.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &LosesInfo);
1175 V = Tmp.convertToDouble();
1181 // FIXME the actual NaN bits should be emitted.
1182 // The prefix for a quiet NaN is 0x7FF8. For a signalling NaN,
1184 const unsigned long QuietNaN = 0x7ff8UL;
1185 //const unsigned long SignalNaN = 0x7ff4UL;
1187 // We need to grab the first part of the FP #
1190 uint64_t ll = DoubleToBits(V);
1191 sprintf(Buffer, "0x%llx", static_cast<long long>(ll));
1193 std::string Num(&Buffer[0], &Buffer[6]);
1194 unsigned long Val = strtoul(Num.c_str(), 0, 16);
1196 if (FPC->getType() == Type::FloatTy)
1197 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "F(\""
1198 << Buffer << "\") /*nan*/ ";
1200 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "(\""
1201 << Buffer << "\") /*nan*/ ";
1202 } else if (IsInf(V)) {
1204 if (V < 0) Out << '-';
1205 Out << "LLVM_INF" << (FPC->getType() == Type::FloatTy ? "F" : "")
1209 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
1210 // Print out the constant as a floating point number.
1212 sprintf(Buffer, "%a", V);
1215 Num = ftostr(FPC->getValueAPF());
1223 case Type::ArrayTyID:
1224 // Use C99 compound expression literal initializer syntax.
1227 printType(Out, CPV->getType());
1230 Out << "{ "; // Arrays are wrapped in struct types.
1231 if (ConstantArray *CA = dyn_cast<ConstantArray>(CPV)) {
1232 printConstantArray(CA, Static);
1234 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1235 const ArrayType *AT = cast<ArrayType>(CPV->getType());
1237 if (AT->getNumElements()) {
1239 Constant *CZ = CPV->getContext().getNullValue(AT->getElementType());
1240 printConstant(CZ, Static);
1241 for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
1243 printConstant(CZ, Static);
1248 Out << " }"; // Arrays are wrapped in struct types.
1251 case Type::VectorTyID:
1252 // Use C99 compound expression literal initializer syntax.
1255 printType(Out, CPV->getType());
1258 if (ConstantVector *CV = dyn_cast<ConstantVector>(CPV)) {
1259 printConstantVector(CV, Static);
1261 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1262 const VectorType *VT = cast<VectorType>(CPV->getType());
1264 Constant *CZ = CPV->getContext().getNullValue(VT->getElementType());
1265 printConstant(CZ, Static);
1266 for (unsigned i = 1, e = VT->getNumElements(); i != e; ++i) {
1268 printConstant(CZ, Static);
1274 case Type::StructTyID:
1275 // Use C99 compound expression literal initializer syntax.
1278 printType(Out, CPV->getType());
1281 if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
1282 const StructType *ST = cast<StructType>(CPV->getType());
1284 if (ST->getNumElements()) {
1287 CPV->getContext().getNullValue(ST->getElementType(0)), Static);
1288 for (unsigned i = 1, e = ST->getNumElements(); i != e; ++i) {
1291 CPV->getContext().getNullValue(ST->getElementType(i)), Static);
1297 if (CPV->getNumOperands()) {
1299 printConstant(cast<Constant>(CPV->getOperand(0)), Static);
1300 for (unsigned i = 1, e = CPV->getNumOperands(); i != e; ++i) {
1302 printConstant(cast<Constant>(CPV->getOperand(i)), Static);
1309 case Type::PointerTyID:
1310 if (isa<ConstantPointerNull>(CPV)) {
1312 printType(Out, CPV->getType()); // sign doesn't matter
1313 Out << ")/*NULL*/0)";
1315 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(CPV)) {
1316 writeOperand(GV, Static);
1322 cerr << "Unknown constant type: " << *CPV << "\n";
1324 llvm_unreachable(0);
1328 // Some constant expressions need to be casted back to the original types
1329 // because their operands were casted to the expected type. This function takes
1330 // care of detecting that case and printing the cast for the ConstantExpr.
1331 bool CWriter::printConstExprCast(const ConstantExpr* CE, bool Static) {
1332 bool NeedsExplicitCast = false;
1333 const Type *Ty = CE->getOperand(0)->getType();
1334 bool TypeIsSigned = false;
1335 switch (CE->getOpcode()) {
1336 case Instruction::Add:
1337 case Instruction::Sub:
1338 case Instruction::Mul:
1339 // We need to cast integer arithmetic so that it is always performed
1340 // as unsigned, to avoid undefined behavior on overflow.
1341 case Instruction::LShr:
1342 case Instruction::URem:
1343 case Instruction::UDiv: NeedsExplicitCast = true; break;
1344 case Instruction::AShr:
1345 case Instruction::SRem:
1346 case Instruction::SDiv: NeedsExplicitCast = true; TypeIsSigned = true; break;
1347 case Instruction::SExt:
1349 NeedsExplicitCast = true;
1350 TypeIsSigned = true;
1352 case Instruction::ZExt:
1353 case Instruction::Trunc:
1354 case Instruction::FPTrunc:
1355 case Instruction::FPExt:
1356 case Instruction::UIToFP:
1357 case Instruction::SIToFP:
1358 case Instruction::FPToUI:
1359 case Instruction::FPToSI:
1360 case Instruction::PtrToInt:
1361 case Instruction::IntToPtr:
1362 case Instruction::BitCast:
1364 NeedsExplicitCast = true;
1368 if (NeedsExplicitCast) {
1370 if (Ty->isInteger() && Ty != Type::Int1Ty)
1371 printSimpleType(Out, Ty, TypeIsSigned);
1373 printType(Out, Ty); // not integer, sign doesn't matter
1376 return NeedsExplicitCast;
1379 // Print a constant assuming that it is the operand for a given Opcode. The
1380 // opcodes that care about sign need to cast their operands to the expected
1381 // type before the operation proceeds. This function does the casting.
1382 void CWriter::printConstantWithCast(Constant* CPV, unsigned Opcode) {
1384 // Extract the operand's type, we'll need it.
1385 const Type* OpTy = CPV->getType();
1387 // Indicate whether to do the cast or not.
1388 bool shouldCast = false;
1389 bool typeIsSigned = false;
1391 // Based on the Opcode for which this Constant is being written, determine
1392 // the new type to which the operand should be casted by setting the value
1393 // of OpTy. If we change OpTy, also set shouldCast to true so it gets
1397 // for most instructions, it doesn't matter
1399 case Instruction::Add:
1400 case Instruction::Sub:
1401 case Instruction::Mul:
1402 // We need to cast integer arithmetic so that it is always performed
1403 // as unsigned, to avoid undefined behavior on overflow.
1404 case Instruction::LShr:
1405 case Instruction::UDiv:
1406 case Instruction::URem:
1409 case Instruction::AShr:
1410 case Instruction::SDiv:
1411 case Instruction::SRem:
1413 typeIsSigned = true;
1417 // Write out the casted constant if we should, otherwise just write the
1421 printSimpleType(Out, OpTy, typeIsSigned);
1423 printConstant(CPV, false);
1426 printConstant(CPV, false);
1429 std::string CWriter::GetValueName(const Value *Operand) {
1430 // Mangle globals with the standard mangler interface for LLC compatibility.
1431 if (const GlobalValue *GV = dyn_cast<GlobalValue>(Operand))
1432 return Mang->getMangledName(GV);
1434 std::string Name = Operand->getName();
1436 if (Name.empty()) { // Assign unique names to local temporaries.
1437 unsigned &No = AnonValueNumbers[Operand];
1439 No = ++NextAnonValueNumber;
1440 Name = "tmp__" + utostr(No);
1443 std::string VarName;
1444 VarName.reserve(Name.capacity());
1446 for (std::string::iterator I = Name.begin(), E = Name.end();
1450 if (!((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
1451 (ch >= '0' && ch <= '9') || ch == '_')) {
1453 sprintf(buffer, "_%x_", ch);
1459 return "llvm_cbe_" + VarName;
1462 /// writeInstComputationInline - Emit the computation for the specified
1463 /// instruction inline, with no destination provided.
1464 void CWriter::writeInstComputationInline(Instruction &I) {
1465 // We can't currently support integer types other than 1, 8, 16, 32, 64.
1467 const Type *Ty = I.getType();
1468 if (Ty->isInteger() && (Ty!=Type::Int1Ty && Ty!=Type::Int8Ty &&
1469 Ty!=Type::Int16Ty && Ty!=Type::Int32Ty && Ty!=Type::Int64Ty)) {
1470 llvm_report_error("The C backend does not currently support integer "
1471 "types of widths other than 1, 8, 16, 32, 64.\n"
1472 "This is being tracked as PR 4158.");
1475 // If this is a non-trivial bool computation, make sure to truncate down to
1476 // a 1 bit value. This is important because we want "add i1 x, y" to return
1477 // "0" when x and y are true, not "2" for example.
1478 bool NeedBoolTrunc = false;
1479 if (I.getType() == Type::Int1Ty && !isa<ICmpInst>(I) && !isa<FCmpInst>(I))
1480 NeedBoolTrunc = true;
1492 void CWriter::writeOperandInternal(Value *Operand, bool Static) {
1493 if (Instruction *I = dyn_cast<Instruction>(Operand))
1494 // Should we inline this instruction to build a tree?
1495 if (isInlinableInst(*I) && !isDirectAlloca(I)) {
1497 writeInstComputationInline(*I);
1502 Constant* CPV = dyn_cast<Constant>(Operand);
1504 if (CPV && !isa<GlobalValue>(CPV))
1505 printConstant(CPV, Static);
1507 Out << GetValueName(Operand);
1510 void CWriter::writeOperand(Value *Operand, bool Static) {
1511 bool isAddressImplicit = isAddressExposed(Operand);
1512 if (isAddressImplicit)
1513 Out << "(&"; // Global variables are referenced as their addresses by llvm
1515 writeOperandInternal(Operand, Static);
1517 if (isAddressImplicit)
1521 // Some instructions need to have their result value casted back to the
1522 // original types because their operands were casted to the expected type.
1523 // This function takes care of detecting that case and printing the cast
1524 // for the Instruction.
1525 bool CWriter::writeInstructionCast(const Instruction &I) {
1526 const Type *Ty = I.getOperand(0)->getType();
1527 switch (I.getOpcode()) {
1528 case Instruction::Add:
1529 case Instruction::Sub:
1530 case Instruction::Mul:
1531 // We need to cast integer arithmetic so that it is always performed
1532 // as unsigned, to avoid undefined behavior on overflow.
1533 case Instruction::LShr:
1534 case Instruction::URem:
1535 case Instruction::UDiv:
1537 printSimpleType(Out, Ty, false);
1540 case Instruction::AShr:
1541 case Instruction::SRem:
1542 case Instruction::SDiv:
1544 printSimpleType(Out, Ty, true);
1552 // Write the operand with a cast to another type based on the Opcode being used.
1553 // This will be used in cases where an instruction has specific type
1554 // requirements (usually signedness) for its operands.
1555 void CWriter::writeOperandWithCast(Value* Operand, unsigned Opcode) {
1557 // Extract the operand's type, we'll need it.
1558 const Type* OpTy = Operand->getType();
1560 // Indicate whether to do the cast or not.
1561 bool shouldCast = false;
1563 // Indicate whether the cast should be to a signed type or not.
1564 bool castIsSigned = false;
1566 // Based on the Opcode for which this Operand is being written, determine
1567 // the new type to which the operand should be casted by setting the value
1568 // of OpTy. If we change OpTy, also set shouldCast to true.
1571 // for most instructions, it doesn't matter
1573 case Instruction::Add:
1574 case Instruction::Sub:
1575 case Instruction::Mul:
1576 // We need to cast integer arithmetic so that it is always performed
1577 // as unsigned, to avoid undefined behavior on overflow.
1578 case Instruction::LShr:
1579 case Instruction::UDiv:
1580 case Instruction::URem: // Cast to unsigned first
1582 castIsSigned = false;
1584 case Instruction::GetElementPtr:
1585 case Instruction::AShr:
1586 case Instruction::SDiv:
1587 case Instruction::SRem: // Cast to signed first
1589 castIsSigned = true;
1593 // Write out the casted operand if we should, otherwise just write the
1597 printSimpleType(Out, OpTy, castIsSigned);
1599 writeOperand(Operand);
1602 writeOperand(Operand);
1605 // Write the operand with a cast to another type based on the icmp predicate
1607 void CWriter::writeOperandWithCast(Value* Operand, const ICmpInst &Cmp) {
1608 // This has to do a cast to ensure the operand has the right signedness.
1609 // Also, if the operand is a pointer, we make sure to cast to an integer when
1610 // doing the comparison both for signedness and so that the C compiler doesn't
1611 // optimize things like "p < NULL" to false (p may contain an integer value
1613 bool shouldCast = Cmp.isRelational();
1615 // Write out the casted operand if we should, otherwise just write the
1618 writeOperand(Operand);
1622 // Should this be a signed comparison? If so, convert to signed.
1623 bool castIsSigned = Cmp.isSignedPredicate();
1625 // If the operand was a pointer, convert to a large integer type.
1626 const Type* OpTy = Operand->getType();
1627 if (isa<PointerType>(OpTy))
1628 OpTy = TD->getIntPtrType();
1631 printSimpleType(Out, OpTy, castIsSigned);
1633 writeOperand(Operand);
1637 // generateCompilerSpecificCode - This is where we add conditional compilation
1638 // directives to cater to specific compilers as need be.
1640 static void generateCompilerSpecificCode(formatted_raw_ostream& Out,
1641 const TargetData *TD) {
1642 // Alloca is hard to get, and we don't want to include stdlib.h here.
1643 Out << "/* get a declaration for alloca */\n"
1644 << "#if defined(__CYGWIN__) || defined(__MINGW32__)\n"
1645 << "#define alloca(x) __builtin_alloca((x))\n"
1646 << "#define _alloca(x) __builtin_alloca((x))\n"
1647 << "#elif defined(__APPLE__)\n"
1648 << "extern void *__builtin_alloca(unsigned long);\n"
1649 << "#define alloca(x) __builtin_alloca(x)\n"
1650 << "#define longjmp _longjmp\n"
1651 << "#define setjmp _setjmp\n"
1652 << "#elif defined(__sun__)\n"
1653 << "#if defined(__sparcv9)\n"
1654 << "extern void *__builtin_alloca(unsigned long);\n"
1656 << "extern void *__builtin_alloca(unsigned int);\n"
1658 << "#define alloca(x) __builtin_alloca(x)\n"
1659 << "#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)\n"
1660 << "#define alloca(x) __builtin_alloca(x)\n"
1661 << "#elif defined(_MSC_VER)\n"
1662 << "#define inline _inline\n"
1663 << "#define alloca(x) _alloca(x)\n"
1665 << "#include <alloca.h>\n"
1668 // We output GCC specific attributes to preserve 'linkonce'ness on globals.
1669 // If we aren't being compiled with GCC, just drop these attributes.
1670 Out << "#ifndef __GNUC__ /* Can only support \"linkonce\" vars with GCC */\n"
1671 << "#define __attribute__(X)\n"
1674 // On Mac OS X, "external weak" is spelled "__attribute__((weak_import))".
1675 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1676 << "#define __EXTERNAL_WEAK__ __attribute__((weak_import))\n"
1677 << "#elif defined(__GNUC__)\n"
1678 << "#define __EXTERNAL_WEAK__ __attribute__((weak))\n"
1680 << "#define __EXTERNAL_WEAK__\n"
1683 // For now, turn off the weak linkage attribute on Mac OS X. (See above.)
1684 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1685 << "#define __ATTRIBUTE_WEAK__\n"
1686 << "#elif defined(__GNUC__)\n"
1687 << "#define __ATTRIBUTE_WEAK__ __attribute__((weak))\n"
1689 << "#define __ATTRIBUTE_WEAK__\n"
1692 // Add hidden visibility support. FIXME: APPLE_CC?
1693 Out << "#if defined(__GNUC__)\n"
1694 << "#define __HIDDEN__ __attribute__((visibility(\"hidden\")))\n"
1697 // Define NaN and Inf as GCC builtins if using GCC, as 0 otherwise
1698 // From the GCC documentation:
1700 // double __builtin_nan (const char *str)
1702 // This is an implementation of the ISO C99 function nan.
1704 // Since ISO C99 defines this function in terms of strtod, which we do
1705 // not implement, a description of the parsing is in order. The string is
1706 // parsed as by strtol; that is, the base is recognized by leading 0 or
1707 // 0x prefixes. The number parsed is placed in the significand such that
1708 // the least significant bit of the number is at the least significant
1709 // bit of the significand. The number is truncated to fit the significand
1710 // field provided. The significand is forced to be a quiet NaN.
1712 // This function, if given a string literal, is evaluated early enough
1713 // that it is considered a compile-time constant.
1715 // float __builtin_nanf (const char *str)
1717 // Similar to __builtin_nan, except the return type is float.
1719 // double __builtin_inf (void)
1721 // Similar to __builtin_huge_val, except a warning is generated if the
1722 // target floating-point format does not support infinities. This
1723 // function is suitable for implementing the ISO C99 macro INFINITY.
1725 // float __builtin_inff (void)
1727 // Similar to __builtin_inf, except the return type is float.
1728 Out << "#ifdef __GNUC__\n"
1729 << "#define LLVM_NAN(NanStr) __builtin_nan(NanStr) /* Double */\n"
1730 << "#define LLVM_NANF(NanStr) __builtin_nanf(NanStr) /* Float */\n"
1731 << "#define LLVM_NANS(NanStr) __builtin_nans(NanStr) /* Double */\n"
1732 << "#define LLVM_NANSF(NanStr) __builtin_nansf(NanStr) /* Float */\n"
1733 << "#define LLVM_INF __builtin_inf() /* Double */\n"
1734 << "#define LLVM_INFF __builtin_inff() /* Float */\n"
1735 << "#define LLVM_PREFETCH(addr,rw,locality) "
1736 "__builtin_prefetch(addr,rw,locality)\n"
1737 << "#define __ATTRIBUTE_CTOR__ __attribute__((constructor))\n"
1738 << "#define __ATTRIBUTE_DTOR__ __attribute__((destructor))\n"
1739 << "#define LLVM_ASM __asm__\n"
1741 << "#define LLVM_NAN(NanStr) ((double)0.0) /* Double */\n"
1742 << "#define LLVM_NANF(NanStr) 0.0F /* Float */\n"
1743 << "#define LLVM_NANS(NanStr) ((double)0.0) /* Double */\n"
1744 << "#define LLVM_NANSF(NanStr) 0.0F /* Float */\n"
1745 << "#define LLVM_INF ((double)0.0) /* Double */\n"
1746 << "#define LLVM_INFF 0.0F /* Float */\n"
1747 << "#define LLVM_PREFETCH(addr,rw,locality) /* PREFETCH */\n"
1748 << "#define __ATTRIBUTE_CTOR__\n"
1749 << "#define __ATTRIBUTE_DTOR__\n"
1750 << "#define LLVM_ASM(X)\n"
1753 Out << "#if __GNUC__ < 4 /* Old GCC's, or compilers not GCC */ \n"
1754 << "#define __builtin_stack_save() 0 /* not implemented */\n"
1755 << "#define __builtin_stack_restore(X) /* noop */\n"
1758 // Output typedefs for 128-bit integers. If these are needed with a
1759 // 32-bit target or with a C compiler that doesn't support mode(TI),
1760 // more drastic measures will be needed.
1761 Out << "#if __GNUC__ && __LP64__ /* 128-bit integer types */\n"
1762 << "typedef int __attribute__((mode(TI))) llvmInt128;\n"
1763 << "typedef unsigned __attribute__((mode(TI))) llvmUInt128;\n"
1766 // Output target-specific code that should be inserted into main.
1767 Out << "#define CODE_FOR_MAIN() /* Any target-specific code for main()*/\n";
1770 /// FindStaticTors - Given a static ctor/dtor list, unpack its contents into
1771 /// the StaticTors set.
1772 static void FindStaticTors(GlobalVariable *GV, std::set<Function*> &StaticTors){
1773 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
1774 if (!InitList) return;
1776 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
1777 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
1778 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
1780 if (CS->getOperand(1)->isNullValue())
1781 return; // Found a null terminator, exit printing.
1782 Constant *FP = CS->getOperand(1);
1783 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
1785 FP = CE->getOperand(0);
1786 if (Function *F = dyn_cast<Function>(FP))
1787 StaticTors.insert(F);
1791 enum SpecialGlobalClass {
1793 GlobalCtors, GlobalDtors,
1797 /// getGlobalVariableClass - If this is a global that is specially recognized
1798 /// by LLVM, return a code that indicates how we should handle it.
1799 static SpecialGlobalClass getGlobalVariableClass(const GlobalVariable *GV) {
1800 // If this is a global ctors/dtors list, handle it now.
1801 if (GV->hasAppendingLinkage() && GV->use_empty()) {
1802 if (GV->getName() == "llvm.global_ctors")
1804 else if (GV->getName() == "llvm.global_dtors")
1808 // Otherwise, it it is other metadata, don't print it. This catches things
1809 // like debug information.
1810 if (GV->getSection() == "llvm.metadata")
1817 bool CWriter::doInitialization(Module &M) {
1818 FunctionPass::doInitialization(M);
1823 TD = new TargetData(&M);
1824 IL = new IntrinsicLowering(*TD);
1825 IL->AddPrototypes(M);
1827 // Ensure that all structure types have names...
1828 Mang = new Mangler(M);
1829 Mang->markCharUnacceptable('.');
1831 // Keep track of which functions are static ctors/dtors so they can have
1832 // an attribute added to their prototypes.
1833 std::set<Function*> StaticCtors, StaticDtors;
1834 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1836 switch (getGlobalVariableClass(I)) {
1839 FindStaticTors(I, StaticCtors);
1842 FindStaticTors(I, StaticDtors);
1847 // get declaration for alloca
1848 Out << "/* Provide Declarations */\n";
1849 Out << "#include <stdarg.h>\n"; // Varargs support
1850 Out << "#include <setjmp.h>\n"; // Unwind support
1851 generateCompilerSpecificCode(Out, TD);
1853 // Provide a definition for `bool' if not compiling with a C++ compiler.
1855 << "#ifndef __cplusplus\ntypedef unsigned char bool;\n#endif\n"
1857 << "\n\n/* Support for floating point constants */\n"
1858 << "typedef unsigned long long ConstantDoubleTy;\n"
1859 << "typedef unsigned int ConstantFloatTy;\n"
1860 << "typedef struct { unsigned long long f1; unsigned short f2; "
1861 "unsigned short pad[3]; } ConstantFP80Ty;\n"
1862 // This is used for both kinds of 128-bit long double; meaning differs.
1863 << "typedef struct { unsigned long long f1; unsigned long long f2; }"
1864 " ConstantFP128Ty;\n"
1865 << "\n\n/* Global Declarations */\n";
1867 // First output all the declarations for the program, because C requires
1868 // Functions & globals to be declared before they are used.
1871 // Loop over the symbol table, emitting all named constants...
1872 printModuleTypes(M.getTypeSymbolTable());
1874 // Global variable declarations...
1875 if (!M.global_empty()) {
1876 Out << "\n/* External Global Variable Declarations */\n";
1877 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1880 if (I->hasExternalLinkage() || I->hasExternalWeakLinkage() ||
1881 I->hasCommonLinkage())
1883 else if (I->hasDLLImportLinkage())
1884 Out << "__declspec(dllimport) ";
1886 continue; // Internal Global
1888 // Thread Local Storage
1889 if (I->isThreadLocal())
1892 printType(Out, I->getType()->getElementType(), false, GetValueName(I));
1894 if (I->hasExternalWeakLinkage())
1895 Out << " __EXTERNAL_WEAK__";
1900 // Function declarations
1901 Out << "\n/* Function Declarations */\n";
1902 Out << "double fmod(double, double);\n"; // Support for FP rem
1903 Out << "float fmodf(float, float);\n";
1904 Out << "long double fmodl(long double, long double);\n";
1906 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
1907 // Don't print declarations for intrinsic functions.
1908 if (!I->isIntrinsic() && I->getName() != "setjmp" &&
1909 I->getName() != "longjmp" && I->getName() != "_setjmp") {
1910 if (I->hasExternalWeakLinkage())
1912 printFunctionSignature(I, true);
1913 if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
1914 Out << " __ATTRIBUTE_WEAK__";
1915 if (I->hasExternalWeakLinkage())
1916 Out << " __EXTERNAL_WEAK__";
1917 if (StaticCtors.count(I))
1918 Out << " __ATTRIBUTE_CTOR__";
1919 if (StaticDtors.count(I))
1920 Out << " __ATTRIBUTE_DTOR__";
1921 if (I->hasHiddenVisibility())
1922 Out << " __HIDDEN__";
1924 if (I->hasName() && I->getName()[0] == 1)
1925 Out << " LLVM_ASM(\"" << I->getName().substr(1) << "\")";
1931 // Output the global variable declarations
1932 if (!M.global_empty()) {
1933 Out << "\n\n/* Global Variable Declarations */\n";
1934 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1936 if (!I->isDeclaration()) {
1937 // Ignore special globals, such as debug info.
1938 if (getGlobalVariableClass(I))
1941 if (I->hasLocalLinkage())
1946 // Thread Local Storage
1947 if (I->isThreadLocal())
1950 printType(Out, I->getType()->getElementType(), false,
1953 if (I->hasLinkOnceLinkage())
1954 Out << " __attribute__((common))";
1955 else if (I->hasCommonLinkage()) // FIXME is this right?
1956 Out << " __ATTRIBUTE_WEAK__";
1957 else if (I->hasWeakLinkage())
1958 Out << " __ATTRIBUTE_WEAK__";
1959 else if (I->hasExternalWeakLinkage())
1960 Out << " __EXTERNAL_WEAK__";
1961 if (I->hasHiddenVisibility())
1962 Out << " __HIDDEN__";
1967 // Output the global variable definitions and contents...
1968 if (!M.global_empty()) {
1969 Out << "\n\n/* Global Variable Definitions and Initialization */\n";
1970 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1972 if (!I->isDeclaration()) {
1973 // Ignore special globals, such as debug info.
1974 if (getGlobalVariableClass(I))
1977 if (I->hasLocalLinkage())
1979 else if (I->hasDLLImportLinkage())
1980 Out << "__declspec(dllimport) ";
1981 else if (I->hasDLLExportLinkage())
1982 Out << "__declspec(dllexport) ";
1984 // Thread Local Storage
1985 if (I->isThreadLocal())
1988 printType(Out, I->getType()->getElementType(), false,
1990 if (I->hasLinkOnceLinkage())
1991 Out << " __attribute__((common))";
1992 else if (I->hasWeakLinkage())
1993 Out << " __ATTRIBUTE_WEAK__";
1994 else if (I->hasCommonLinkage())
1995 Out << " __ATTRIBUTE_WEAK__";
1997 if (I->hasHiddenVisibility())
1998 Out << " __HIDDEN__";
2000 // If the initializer is not null, emit the initializer. If it is null,
2001 // we try to avoid emitting large amounts of zeros. The problem with
2002 // this, however, occurs when the variable has weak linkage. In this
2003 // case, the assembler will complain about the variable being both weak
2004 // and common, so we disable this optimization.
2005 // FIXME common linkage should avoid this problem.
2006 if (!I->getInitializer()->isNullValue()) {
2008 writeOperand(I->getInitializer(), true);
2009 } else if (I->hasWeakLinkage()) {
2010 // We have to specify an initializer, but it doesn't have to be
2011 // complete. If the value is an aggregate, print out { 0 }, and let
2012 // the compiler figure out the rest of the zeros.
2014 if (isa<StructType>(I->getInitializer()->getType()) ||
2015 isa<VectorType>(I->getInitializer()->getType())) {
2017 } else if (isa<ArrayType>(I->getInitializer()->getType())) {
2018 // As with structs and vectors, but with an extra set of braces
2019 // because arrays are wrapped in structs.
2022 // Just print it out normally.
2023 writeOperand(I->getInitializer(), true);
2031 Out << "\n\n/* Function Bodies */\n";
2033 // Emit some helper functions for dealing with FCMP instruction's
2035 Out << "static inline int llvm_fcmp_ord(double X, double Y) { ";
2036 Out << "return X == X && Y == Y; }\n";
2037 Out << "static inline int llvm_fcmp_uno(double X, double Y) { ";
2038 Out << "return X != X || Y != Y; }\n";
2039 Out << "static inline int llvm_fcmp_ueq(double X, double Y) { ";
2040 Out << "return X == Y || llvm_fcmp_uno(X, Y); }\n";
2041 Out << "static inline int llvm_fcmp_une(double X, double Y) { ";
2042 Out << "return X != Y; }\n";
2043 Out << "static inline int llvm_fcmp_ult(double X, double Y) { ";
2044 Out << "return X < Y || llvm_fcmp_uno(X, Y); }\n";
2045 Out << "static inline int llvm_fcmp_ugt(double X, double Y) { ";
2046 Out << "return X > Y || llvm_fcmp_uno(X, Y); }\n";
2047 Out << "static inline int llvm_fcmp_ule(double X, double Y) { ";
2048 Out << "return X <= Y || llvm_fcmp_uno(X, Y); }\n";
2049 Out << "static inline int llvm_fcmp_uge(double X, double Y) { ";
2050 Out << "return X >= Y || llvm_fcmp_uno(X, Y); }\n";
2051 Out << "static inline int llvm_fcmp_oeq(double X, double Y) { ";
2052 Out << "return X == Y ; }\n";
2053 Out << "static inline int llvm_fcmp_one(double X, double Y) { ";
2054 Out << "return X != Y && llvm_fcmp_ord(X, Y); }\n";
2055 Out << "static inline int llvm_fcmp_olt(double X, double Y) { ";
2056 Out << "return X < Y ; }\n";
2057 Out << "static inline int llvm_fcmp_ogt(double X, double Y) { ";
2058 Out << "return X > Y ; }\n";
2059 Out << "static inline int llvm_fcmp_ole(double X, double Y) { ";
2060 Out << "return X <= Y ; }\n";
2061 Out << "static inline int llvm_fcmp_oge(double X, double Y) { ";
2062 Out << "return X >= Y ; }\n";
2067 /// Output all floating point constants that cannot be printed accurately...
2068 void CWriter::printFloatingPointConstants(Function &F) {
2069 // Scan the module for floating point constants. If any FP constant is used
2070 // in the function, we want to redirect it here so that we do not depend on
2071 // the precision of the printed form, unless the printed form preserves
2074 for (constant_iterator I = constant_begin(&F), E = constant_end(&F);
2076 printFloatingPointConstants(*I);
2081 void CWriter::printFloatingPointConstants(const Constant *C) {
2082 // If this is a constant expression, recursively check for constant fp values.
2083 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
2084 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i)
2085 printFloatingPointConstants(CE->getOperand(i));
2089 // Otherwise, check for a FP constant that we need to print.
2090 const ConstantFP *FPC = dyn_cast<ConstantFP>(C);
2092 // Do not put in FPConstantMap if safe.
2093 isFPCSafeToPrint(FPC) ||
2094 // Already printed this constant?
2095 FPConstantMap.count(FPC))
2098 FPConstantMap[FPC] = FPCounter; // Number the FP constants
2100 if (FPC->getType() == Type::DoubleTy) {
2101 double Val = FPC->getValueAPF().convertToDouble();
2102 uint64_t i = FPC->getValueAPF().bitcastToAPInt().getZExtValue();
2103 Out << "static const ConstantDoubleTy FPConstant" << FPCounter++
2104 << " = 0x" << utohexstr(i)
2105 << "ULL; /* " << Val << " */\n";
2106 } else if (FPC->getType() == Type::FloatTy) {
2107 float Val = FPC->getValueAPF().convertToFloat();
2108 uint32_t i = (uint32_t)FPC->getValueAPF().bitcastToAPInt().
2110 Out << "static const ConstantFloatTy FPConstant" << FPCounter++
2111 << " = 0x" << utohexstr(i)
2112 << "U; /* " << Val << " */\n";
2113 } else if (FPC->getType() == Type::X86_FP80Ty) {
2114 // api needed to prevent premature destruction
2115 APInt api = FPC->getValueAPF().bitcastToAPInt();
2116 const uint64_t *p = api.getRawData();
2117 Out << "static const ConstantFP80Ty FPConstant" << FPCounter++
2118 << " = { 0x" << utohexstr(p[0])
2119 << "ULL, 0x" << utohexstr((uint16_t)p[1]) << ",{0,0,0}"
2120 << "}; /* Long double constant */\n";
2121 } else if (FPC->getType() == Type::PPC_FP128Ty) {
2122 APInt api = FPC->getValueAPF().bitcastToAPInt();
2123 const uint64_t *p = api.getRawData();
2124 Out << "static const ConstantFP128Ty FPConstant" << FPCounter++
2126 << utohexstr(p[0]) << ", 0x" << utohexstr(p[1])
2127 << "}; /* Long double constant */\n";
2130 llvm_unreachable("Unknown float type!");
2136 /// printSymbolTable - Run through symbol table looking for type names. If a
2137 /// type name is found, emit its declaration...
2139 void CWriter::printModuleTypes(const TypeSymbolTable &TST) {
2140 Out << "/* Helper union for bitcasts */\n";
2141 Out << "typedef union {\n";
2142 Out << " unsigned int Int32;\n";
2143 Out << " unsigned long long Int64;\n";
2144 Out << " float Float;\n";
2145 Out << " double Double;\n";
2146 Out << "} llvmBitCastUnion;\n";
2148 // We are only interested in the type plane of the symbol table.
2149 TypeSymbolTable::const_iterator I = TST.begin();
2150 TypeSymbolTable::const_iterator End = TST.end();
2152 // If there are no type names, exit early.
2153 if (I == End) return;
2155 // Print out forward declarations for structure types before anything else!
2156 Out << "/* Structure forward decls */\n";
2157 for (; I != End; ++I) {
2158 std::string Name = "struct l_" + Mang->makeNameProper(I->first);
2159 Out << Name << ";\n";
2160 TypeNames.insert(std::make_pair(I->second, Name));
2165 // Now we can print out typedefs. Above, we guaranteed that this can only be
2166 // for struct or opaque types.
2167 Out << "/* Typedefs */\n";
2168 for (I = TST.begin(); I != End; ++I) {
2169 std::string Name = "l_" + Mang->makeNameProper(I->first);
2171 printType(Out, I->second, false, Name);
2177 // Keep track of which structures have been printed so far...
2178 std::set<const Type *> StructPrinted;
2180 // Loop over all structures then push them into the stack so they are
2181 // printed in the correct order.
2183 Out << "/* Structure contents */\n";
2184 for (I = TST.begin(); I != End; ++I)
2185 if (isa<StructType>(I->second) || isa<ArrayType>(I->second))
2186 // Only print out used types!
2187 printContainedStructs(I->second, StructPrinted);
2190 // Push the struct onto the stack and recursively push all structs
2191 // this one depends on.
2193 // TODO: Make this work properly with vector types
2195 void CWriter::printContainedStructs(const Type *Ty,
2196 std::set<const Type*> &StructPrinted) {
2197 // Don't walk through pointers.
2198 if (isa<PointerType>(Ty) || Ty->isPrimitiveType() || Ty->isInteger()) return;
2200 // Print all contained types first.
2201 for (Type::subtype_iterator I = Ty->subtype_begin(),
2202 E = Ty->subtype_end(); I != E; ++I)
2203 printContainedStructs(*I, StructPrinted);
2205 if (isa<StructType>(Ty) || isa<ArrayType>(Ty)) {
2206 // Check to see if we have already printed this struct.
2207 if (StructPrinted.insert(Ty).second) {
2208 // Print structure type out.
2209 std::string Name = TypeNames[Ty];
2210 printType(Out, Ty, false, Name, true);
2216 void CWriter::printFunctionSignature(const Function *F, bool Prototype) {
2217 /// isStructReturn - Should this function actually return a struct by-value?
2218 bool isStructReturn = F->hasStructRetAttr();
2220 if (F->hasLocalLinkage()) Out << "static ";
2221 if (F->hasDLLImportLinkage()) Out << "__declspec(dllimport) ";
2222 if (F->hasDLLExportLinkage()) Out << "__declspec(dllexport) ";
2223 switch (F->getCallingConv()) {
2224 case CallingConv::X86_StdCall:
2225 Out << "__attribute__((stdcall)) ";
2227 case CallingConv::X86_FastCall:
2228 Out << "__attribute__((fastcall)) ";
2232 // Loop over the arguments, printing them...
2233 const FunctionType *FT = cast<FunctionType>(F->getFunctionType());
2234 const AttrListPtr &PAL = F->getAttributes();
2236 std::stringstream FunctionInnards;
2238 // Print out the name...
2239 FunctionInnards << GetValueName(F) << '(';
2241 bool PrintedArg = false;
2242 if (!F->isDeclaration()) {
2243 if (!F->arg_empty()) {
2244 Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
2247 // If this is a struct-return function, don't print the hidden
2248 // struct-return argument.
2249 if (isStructReturn) {
2250 assert(I != E && "Invalid struct return function!");
2255 std::string ArgName;
2256 for (; I != E; ++I) {
2257 if (PrintedArg) FunctionInnards << ", ";
2258 if (I->hasName() || !Prototype)
2259 ArgName = GetValueName(I);
2262 const Type *ArgTy = I->getType();
2263 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2264 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2265 ByValParams.insert(I);
2267 printType(FunctionInnards, ArgTy,
2268 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt),
2275 // Loop over the arguments, printing them.
2276 FunctionType::param_iterator I = FT->param_begin(), E = FT->param_end();
2279 // If this is a struct-return function, don't print the hidden
2280 // struct-return argument.
2281 if (isStructReturn) {
2282 assert(I != E && "Invalid struct return function!");
2287 for (; I != E; ++I) {
2288 if (PrintedArg) FunctionInnards << ", ";
2289 const Type *ArgTy = *I;
2290 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2291 assert(isa<PointerType>(ArgTy));
2292 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2294 printType(FunctionInnards, ArgTy,
2295 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt));
2301 // Finish printing arguments... if this is a vararg function, print the ...,
2302 // unless there are no known types, in which case, we just emit ().
2304 if (FT->isVarArg() && PrintedArg) {
2305 if (PrintedArg) FunctionInnards << ", ";
2306 FunctionInnards << "..."; // Output varargs portion of signature!
2307 } else if (!FT->isVarArg() && !PrintedArg) {
2308 FunctionInnards << "void"; // ret() -> ret(void) in C.
2310 FunctionInnards << ')';
2312 // Get the return tpe for the function.
2314 if (!isStructReturn)
2315 RetTy = F->getReturnType();
2317 // If this is a struct-return function, print the struct-return type.
2318 RetTy = cast<PointerType>(FT->getParamType(0))->getElementType();
2321 // Print out the return type and the signature built above.
2322 printType(Out, RetTy,
2323 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt),
2324 FunctionInnards.str());
2327 static inline bool isFPIntBitCast(const Instruction &I) {
2328 if (!isa<BitCastInst>(I))
2330 const Type *SrcTy = I.getOperand(0)->getType();
2331 const Type *DstTy = I.getType();
2332 return (SrcTy->isFloatingPoint() && DstTy->isInteger()) ||
2333 (DstTy->isFloatingPoint() && SrcTy->isInteger());
2336 void CWriter::printFunction(Function &F) {
2337 /// isStructReturn - Should this function actually return a struct by-value?
2338 bool isStructReturn = F.hasStructRetAttr();
2340 printFunctionSignature(&F, false);
2343 // If this is a struct return function, handle the result with magic.
2344 if (isStructReturn) {
2345 const Type *StructTy =
2346 cast<PointerType>(F.arg_begin()->getType())->getElementType();
2348 printType(Out, StructTy, false, "StructReturn");
2349 Out << "; /* Struct return temporary */\n";
2352 printType(Out, F.arg_begin()->getType(), false,
2353 GetValueName(F.arg_begin()));
2354 Out << " = &StructReturn;\n";
2357 bool PrintedVar = false;
2359 // print local variable information for the function
2360 for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I) {
2361 if (const AllocaInst *AI = isDirectAlloca(&*I)) {
2363 printType(Out, AI->getAllocatedType(), false, GetValueName(AI));
2364 Out << "; /* Address-exposed local */\n";
2366 } else if (I->getType() != Type::VoidTy && !isInlinableInst(*I)) {
2368 printType(Out, I->getType(), false, GetValueName(&*I));
2371 if (isa<PHINode>(*I)) { // Print out PHI node temporaries as well...
2373 printType(Out, I->getType(), false,
2374 GetValueName(&*I)+"__PHI_TEMPORARY");
2379 // We need a temporary for the BitCast to use so it can pluck a value out
2380 // of a union to do the BitCast. This is separate from the need for a
2381 // variable to hold the result of the BitCast.
2382 if (isFPIntBitCast(*I)) {
2383 Out << " llvmBitCastUnion " << GetValueName(&*I)
2384 << "__BITCAST_TEMPORARY;\n";
2392 if (F.hasExternalLinkage() && F.getName() == "main")
2393 Out << " CODE_FOR_MAIN();\n";
2395 // print the basic blocks
2396 for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
2397 if (Loop *L = LI->getLoopFor(BB)) {
2398 if (L->getHeader() == BB && L->getParentLoop() == 0)
2401 printBasicBlock(BB);
2408 void CWriter::printLoop(Loop *L) {
2409 Out << " do { /* Syntactic loop '" << L->getHeader()->getName()
2410 << "' to make GCC happy */\n";
2411 for (unsigned i = 0, e = L->getBlocks().size(); i != e; ++i) {
2412 BasicBlock *BB = L->getBlocks()[i];
2413 Loop *BBLoop = LI->getLoopFor(BB);
2415 printBasicBlock(BB);
2416 else if (BB == BBLoop->getHeader() && BBLoop->getParentLoop() == L)
2419 Out << " } while (1); /* end of syntactic loop '"
2420 << L->getHeader()->getName() << "' */\n";
2423 void CWriter::printBasicBlock(BasicBlock *BB) {
2425 // Don't print the label for the basic block if there are no uses, or if
2426 // the only terminator use is the predecessor basic block's terminator.
2427 // We have to scan the use list because PHI nodes use basic blocks too but
2428 // do not require a label to be generated.
2430 bool NeedsLabel = false;
2431 for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI)
2432 if (isGotoCodeNecessary(*PI, BB)) {
2437 if (NeedsLabel) Out << GetValueName(BB) << ":\n";
2439 // Output all of the instructions in the basic block...
2440 for (BasicBlock::iterator II = BB->begin(), E = --BB->end(); II != E;
2442 if (!isInlinableInst(*II) && !isDirectAlloca(II)) {
2443 if (II->getType() != Type::VoidTy && !isInlineAsm(*II))
2447 writeInstComputationInline(*II);
2452 // Don't emit prefix or suffix for the terminator.
2453 visit(*BB->getTerminator());
2457 // Specific Instruction type classes... note that all of the casts are
2458 // necessary because we use the instruction classes as opaque types...
2460 void CWriter::visitReturnInst(ReturnInst &I) {
2461 // If this is a struct return function, return the temporary struct.
2462 bool isStructReturn = I.getParent()->getParent()->hasStructRetAttr();
2464 if (isStructReturn) {
2465 Out << " return StructReturn;\n";
2469 // Don't output a void return if this is the last basic block in the function
2470 if (I.getNumOperands() == 0 &&
2471 &*--I.getParent()->getParent()->end() == I.getParent() &&
2472 !I.getParent()->size() == 1) {
2476 if (I.getNumOperands() > 1) {
2479 printType(Out, I.getParent()->getParent()->getReturnType());
2480 Out << " llvm_cbe_mrv_temp = {\n";
2481 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
2483 writeOperand(I.getOperand(i));
2489 Out << " return llvm_cbe_mrv_temp;\n";
2495 if (I.getNumOperands()) {
2497 writeOperand(I.getOperand(0));
2502 void CWriter::visitSwitchInst(SwitchInst &SI) {
2505 writeOperand(SI.getOperand(0));
2506 Out << ") {\n default:\n";
2507 printPHICopiesForSuccessor (SI.getParent(), SI.getDefaultDest(), 2);
2508 printBranchToBlock(SI.getParent(), SI.getDefaultDest(), 2);
2510 for (unsigned i = 2, e = SI.getNumOperands(); i != e; i += 2) {
2512 writeOperand(SI.getOperand(i));
2514 BasicBlock *Succ = cast<BasicBlock>(SI.getOperand(i+1));
2515 printPHICopiesForSuccessor (SI.getParent(), Succ, 2);
2516 printBranchToBlock(SI.getParent(), Succ, 2);
2517 if (Function::iterator(Succ) == next(Function::iterator(SI.getParent())))
2523 void CWriter::visitUnreachableInst(UnreachableInst &I) {
2524 Out << " /*UNREACHABLE*/;\n";
2527 bool CWriter::isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
2528 /// FIXME: This should be reenabled, but loop reordering safe!!
2531 if (next(Function::iterator(From)) != Function::iterator(To))
2532 return true; // Not the direct successor, we need a goto.
2534 //isa<SwitchInst>(From->getTerminator())
2536 if (LI->getLoopFor(From) != LI->getLoopFor(To))
2541 void CWriter::printPHICopiesForSuccessor (BasicBlock *CurBlock,
2542 BasicBlock *Successor,
2544 for (BasicBlock::iterator I = Successor->begin(); isa<PHINode>(I); ++I) {
2545 PHINode *PN = cast<PHINode>(I);
2546 // Now we have to do the printing.
2547 Value *IV = PN->getIncomingValueForBlock(CurBlock);
2548 if (!isa<UndefValue>(IV)) {
2549 Out << std::string(Indent, ' ');
2550 Out << " " << GetValueName(I) << "__PHI_TEMPORARY = ";
2552 Out << "; /* for PHI node */\n";
2557 void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
2559 if (isGotoCodeNecessary(CurBB, Succ)) {
2560 Out << std::string(Indent, ' ') << " goto ";
2566 // Branch instruction printing - Avoid printing out a branch to a basic block
2567 // that immediately succeeds the current one.
2569 void CWriter::visitBranchInst(BranchInst &I) {
2571 if (I.isConditional()) {
2572 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(0))) {
2574 writeOperand(I.getCondition());
2577 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 2);
2578 printBranchToBlock(I.getParent(), I.getSuccessor(0), 2);
2580 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(1))) {
2581 Out << " } else {\n";
2582 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2583 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2586 // First goto not necessary, assume second one is...
2588 writeOperand(I.getCondition());
2591 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2592 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2597 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 0);
2598 printBranchToBlock(I.getParent(), I.getSuccessor(0), 0);
2603 // PHI nodes get copied into temporary values at the end of predecessor basic
2604 // blocks. We now need to copy these temporary values into the REAL value for
2606 void CWriter::visitPHINode(PHINode &I) {
2608 Out << "__PHI_TEMPORARY";
2612 void CWriter::visitBinaryOperator(Instruction &I) {
2613 // binary instructions, shift instructions, setCond instructions.
2614 assert(!isa<PointerType>(I.getType()));
2616 // We must cast the results of binary operations which might be promoted.
2617 bool needsCast = false;
2618 if ((I.getType() == Type::Int8Ty) || (I.getType() == Type::Int16Ty)
2619 || (I.getType() == Type::FloatTy)) {
2622 printType(Out, I.getType(), false);
2626 // If this is a negation operation, print it out as such. For FP, we don't
2627 // want to print "-0.0 - X".
2628 if (BinaryOperator::isNeg(&I)) {
2630 writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
2632 } else if (BinaryOperator::isFNeg(&I)) {
2634 writeOperand(BinaryOperator::getFNegArgument(cast<BinaryOperator>(&I)));
2636 } else if (I.getOpcode() == Instruction::FRem) {
2637 // Output a call to fmod/fmodf instead of emitting a%b
2638 if (I.getType() == Type::FloatTy)
2640 else if (I.getType() == Type::DoubleTy)
2642 else // all 3 flavors of long double
2644 writeOperand(I.getOperand(0));
2646 writeOperand(I.getOperand(1));
2650 // Write out the cast of the instruction's value back to the proper type
2652 bool NeedsClosingParens = writeInstructionCast(I);
2654 // Certain instructions require the operand to be forced to a specific type
2655 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2656 // below for operand 1
2657 writeOperandWithCast(I.getOperand(0), I.getOpcode());
2659 switch (I.getOpcode()) {
2660 case Instruction::Add:
2661 case Instruction::FAdd: Out << " + "; break;
2662 case Instruction::Sub:
2663 case Instruction::FSub: Out << " - "; break;
2664 case Instruction::Mul:
2665 case Instruction::FMul: Out << " * "; break;
2666 case Instruction::URem:
2667 case Instruction::SRem:
2668 case Instruction::FRem: Out << " % "; break;
2669 case Instruction::UDiv:
2670 case Instruction::SDiv:
2671 case Instruction::FDiv: Out << " / "; break;
2672 case Instruction::And: Out << " & "; break;
2673 case Instruction::Or: Out << " | "; break;
2674 case Instruction::Xor: Out << " ^ "; break;
2675 case Instruction::Shl : Out << " << "; break;
2676 case Instruction::LShr:
2677 case Instruction::AShr: Out << " >> "; break;
2680 cerr << "Invalid operator type!" << I;
2682 llvm_unreachable(0);
2685 writeOperandWithCast(I.getOperand(1), I.getOpcode());
2686 if (NeedsClosingParens)
2695 void CWriter::visitICmpInst(ICmpInst &I) {
2696 // We must cast the results of icmp which might be promoted.
2697 bool needsCast = false;
2699 // Write out the cast of the instruction's value back to the proper type
2701 bool NeedsClosingParens = writeInstructionCast(I);
2703 // Certain icmp predicate require the operand to be forced to a specific type
2704 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2705 // below for operand 1
2706 writeOperandWithCast(I.getOperand(0), I);
2708 switch (I.getPredicate()) {
2709 case ICmpInst::ICMP_EQ: Out << " == "; break;
2710 case ICmpInst::ICMP_NE: Out << " != "; break;
2711 case ICmpInst::ICMP_ULE:
2712 case ICmpInst::ICMP_SLE: Out << " <= "; break;
2713 case ICmpInst::ICMP_UGE:
2714 case ICmpInst::ICMP_SGE: Out << " >= "; break;
2715 case ICmpInst::ICMP_ULT:
2716 case ICmpInst::ICMP_SLT: Out << " < "; break;
2717 case ICmpInst::ICMP_UGT:
2718 case ICmpInst::ICMP_SGT: Out << " > "; break;
2721 cerr << "Invalid icmp predicate!" << I;
2723 llvm_unreachable(0);
2726 writeOperandWithCast(I.getOperand(1), I);
2727 if (NeedsClosingParens)
2735 void CWriter::visitFCmpInst(FCmpInst &I) {
2736 if (I.getPredicate() == FCmpInst::FCMP_FALSE) {
2740 if (I.getPredicate() == FCmpInst::FCMP_TRUE) {
2746 switch (I.getPredicate()) {
2747 default: llvm_unreachable("Illegal FCmp predicate");
2748 case FCmpInst::FCMP_ORD: op = "ord"; break;
2749 case FCmpInst::FCMP_UNO: op = "uno"; break;
2750 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
2751 case FCmpInst::FCMP_UNE: op = "une"; break;
2752 case FCmpInst::FCMP_ULT: op = "ult"; break;
2753 case FCmpInst::FCMP_ULE: op = "ule"; break;
2754 case FCmpInst::FCMP_UGT: op = "ugt"; break;
2755 case FCmpInst::FCMP_UGE: op = "uge"; break;
2756 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
2757 case FCmpInst::FCMP_ONE: op = "one"; break;
2758 case FCmpInst::FCMP_OLT: op = "olt"; break;
2759 case FCmpInst::FCMP_OLE: op = "ole"; break;
2760 case FCmpInst::FCMP_OGT: op = "ogt"; break;
2761 case FCmpInst::FCMP_OGE: op = "oge"; break;
2764 Out << "llvm_fcmp_" << op << "(";
2765 // Write the first operand
2766 writeOperand(I.getOperand(0));
2768 // Write the second operand
2769 writeOperand(I.getOperand(1));
2773 static const char * getFloatBitCastField(const Type *Ty) {
2774 switch (Ty->getTypeID()) {
2775 default: llvm_unreachable("Invalid Type");
2776 case Type::FloatTyID: return "Float";
2777 case Type::DoubleTyID: return "Double";
2778 case Type::IntegerTyID: {
2779 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
2788 void CWriter::visitCastInst(CastInst &I) {
2789 const Type *DstTy = I.getType();
2790 const Type *SrcTy = I.getOperand(0)->getType();
2791 if (isFPIntBitCast(I)) {
2793 // These int<->float and long<->double casts need to be handled specially
2794 Out << GetValueName(&I) << "__BITCAST_TEMPORARY."
2795 << getFloatBitCastField(I.getOperand(0)->getType()) << " = ";
2796 writeOperand(I.getOperand(0));
2797 Out << ", " << GetValueName(&I) << "__BITCAST_TEMPORARY."
2798 << getFloatBitCastField(I.getType());
2804 printCast(I.getOpcode(), SrcTy, DstTy);
2806 // Make a sext from i1 work by subtracting the i1 from 0 (an int).
2807 if (SrcTy == Type::Int1Ty && I.getOpcode() == Instruction::SExt)
2810 writeOperand(I.getOperand(0));
2812 if (DstTy == Type::Int1Ty &&
2813 (I.getOpcode() == Instruction::Trunc ||
2814 I.getOpcode() == Instruction::FPToUI ||
2815 I.getOpcode() == Instruction::FPToSI ||
2816 I.getOpcode() == Instruction::PtrToInt)) {
2817 // Make sure we really get a trunc to bool by anding the operand with 1
2823 void CWriter::visitSelectInst(SelectInst &I) {
2825 writeOperand(I.getCondition());
2827 writeOperand(I.getTrueValue());
2829 writeOperand(I.getFalseValue());
2834 void CWriter::lowerIntrinsics(Function &F) {
2835 // This is used to keep track of intrinsics that get generated to a lowered
2836 // function. We must generate the prototypes before the function body which
2837 // will only be expanded on first use (by the loop below).
2838 std::vector<Function*> prototypesToGen;
2840 // Examine all the instructions in this function to find the intrinsics that
2841 // need to be lowered.
2842 for (Function::iterator BB = F.begin(), EE = F.end(); BB != EE; ++BB)
2843 for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; )
2844 if (CallInst *CI = dyn_cast<CallInst>(I++))
2845 if (Function *F = CI->getCalledFunction())
2846 switch (F->getIntrinsicID()) {
2847 case Intrinsic::not_intrinsic:
2848 case Intrinsic::memory_barrier:
2849 case Intrinsic::vastart:
2850 case Intrinsic::vacopy:
2851 case Intrinsic::vaend:
2852 case Intrinsic::returnaddress:
2853 case Intrinsic::frameaddress:
2854 case Intrinsic::setjmp:
2855 case Intrinsic::longjmp:
2856 case Intrinsic::prefetch:
2857 case Intrinsic::dbg_stoppoint:
2858 case Intrinsic::powi:
2859 case Intrinsic::x86_sse_cmp_ss:
2860 case Intrinsic::x86_sse_cmp_ps:
2861 case Intrinsic::x86_sse2_cmp_sd:
2862 case Intrinsic::x86_sse2_cmp_pd:
2863 case Intrinsic::ppc_altivec_lvsl:
2864 // We directly implement these intrinsics
2867 // If this is an intrinsic that directly corresponds to a GCC
2868 // builtin, we handle it.
2869 const char *BuiltinName = "";
2870 #define GET_GCC_BUILTIN_NAME
2871 #include "llvm/Intrinsics.gen"
2872 #undef GET_GCC_BUILTIN_NAME
2873 // If we handle it, don't lower it.
2874 if (BuiltinName[0]) break;
2876 // All other intrinsic calls we must lower.
2877 Instruction *Before = 0;
2878 if (CI != &BB->front())
2879 Before = prior(BasicBlock::iterator(CI));
2881 IL->LowerIntrinsicCall(CI);
2882 if (Before) { // Move iterator to instruction after call
2887 // If the intrinsic got lowered to another call, and that call has
2888 // a definition then we need to make sure its prototype is emitted
2889 // before any calls to it.
2890 if (CallInst *Call = dyn_cast<CallInst>(I))
2891 if (Function *NewF = Call->getCalledFunction())
2892 if (!NewF->isDeclaration())
2893 prototypesToGen.push_back(NewF);
2898 // We may have collected some prototypes to emit in the loop above.
2899 // Emit them now, before the function that uses them is emitted. But,
2900 // be careful not to emit them twice.
2901 std::vector<Function*>::iterator I = prototypesToGen.begin();
2902 std::vector<Function*>::iterator E = prototypesToGen.end();
2903 for ( ; I != E; ++I) {
2904 if (intrinsicPrototypesAlreadyGenerated.insert(*I).second) {
2906 printFunctionSignature(*I, true);
2912 void CWriter::visitCallInst(CallInst &I) {
2913 if (isa<InlineAsm>(I.getOperand(0)))
2914 return visitInlineAsm(I);
2916 bool WroteCallee = false;
2918 // Handle intrinsic function calls first...
2919 if (Function *F = I.getCalledFunction())
2920 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
2921 if (visitBuiltinCall(I, ID, WroteCallee))
2924 Value *Callee = I.getCalledValue();
2926 const PointerType *PTy = cast<PointerType>(Callee->getType());
2927 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
2929 // If this is a call to a struct-return function, assign to the first
2930 // parameter instead of passing it to the call.
2931 const AttrListPtr &PAL = I.getAttributes();
2932 bool hasByVal = I.hasByValArgument();
2933 bool isStructRet = I.hasStructRetAttr();
2935 writeOperandDeref(I.getOperand(1));
2939 if (I.isTailCall()) Out << " /*tail*/ ";
2942 // If this is an indirect call to a struct return function, we need to cast
2943 // the pointer. Ditto for indirect calls with byval arguments.
2944 bool NeedsCast = (hasByVal || isStructRet) && !isa<Function>(Callee);
2946 // GCC is a real PITA. It does not permit codegening casts of functions to
2947 // function pointers if they are in a call (it generates a trap instruction
2948 // instead!). We work around this by inserting a cast to void* in between
2949 // the function and the function pointer cast. Unfortunately, we can't just
2950 // form the constant expression here, because the folder will immediately
2953 // Note finally, that this is completely unsafe. ANSI C does not guarantee
2954 // that void* and function pointers have the same size. :( To deal with this
2955 // in the common case, we handle casts where the number of arguments passed
2958 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Callee))
2960 if (Function *RF = dyn_cast<Function>(CE->getOperand(0))) {
2966 // Ok, just cast the pointer type.
2969 printStructReturnPointerFunctionType(Out, PAL,
2970 cast<PointerType>(I.getCalledValue()->getType()));
2972 printType(Out, I.getCalledValue()->getType(), false, "", true, PAL);
2974 printType(Out, I.getCalledValue()->getType());
2977 writeOperand(Callee);
2978 if (NeedsCast) Out << ')';
2983 unsigned NumDeclaredParams = FTy->getNumParams();
2985 CallSite::arg_iterator AI = I.op_begin()+1, AE = I.op_end();
2987 if (isStructRet) { // Skip struct return argument.
2992 bool PrintedArg = false;
2993 for (; AI != AE; ++AI, ++ArgNo) {
2994 if (PrintedArg) Out << ", ";
2995 if (ArgNo < NumDeclaredParams &&
2996 (*AI)->getType() != FTy->getParamType(ArgNo)) {
2998 printType(Out, FTy->getParamType(ArgNo),
2999 /*isSigned=*/PAL.paramHasAttr(ArgNo+1, Attribute::SExt));
3002 // Check if the argument is expected to be passed by value.
3003 if (I.paramHasAttr(ArgNo+1, Attribute::ByVal))
3004 writeOperandDeref(*AI);
3012 /// visitBuiltinCall - Handle the call to the specified builtin. Returns true
3013 /// if the entire call is handled, return false it it wasn't handled, and
3014 /// optionally set 'WroteCallee' if the callee has already been printed out.
3015 bool CWriter::visitBuiltinCall(CallInst &I, Intrinsic::ID ID,
3016 bool &WroteCallee) {
3019 // If this is an intrinsic that directly corresponds to a GCC
3020 // builtin, we emit it here.
3021 const char *BuiltinName = "";
3022 Function *F = I.getCalledFunction();
3023 #define GET_GCC_BUILTIN_NAME
3024 #include "llvm/Intrinsics.gen"
3025 #undef GET_GCC_BUILTIN_NAME
3026 assert(BuiltinName[0] && "Unknown LLVM intrinsic!");
3032 case Intrinsic::memory_barrier:
3033 Out << "__sync_synchronize()";
3035 case Intrinsic::vastart:
3038 Out << "va_start(*(va_list*)";
3039 writeOperand(I.getOperand(1));
3041 // Output the last argument to the enclosing function.
3042 if (I.getParent()->getParent()->arg_empty()) {
3044 raw_string_ostream Msg(msg);
3045 Msg << "The C backend does not currently support zero "
3046 << "argument varargs functions, such as '"
3047 << I.getParent()->getParent()->getName() << "'!";
3048 llvm_report_error(Msg.str());
3050 writeOperand(--I.getParent()->getParent()->arg_end());
3053 case Intrinsic::vaend:
3054 if (!isa<ConstantPointerNull>(I.getOperand(1))) {
3055 Out << "0; va_end(*(va_list*)";
3056 writeOperand(I.getOperand(1));
3059 Out << "va_end(*(va_list*)0)";
3062 case Intrinsic::vacopy:
3064 Out << "va_copy(*(va_list*)";
3065 writeOperand(I.getOperand(1));
3066 Out << ", *(va_list*)";
3067 writeOperand(I.getOperand(2));
3070 case Intrinsic::returnaddress:
3071 Out << "__builtin_return_address(";
3072 writeOperand(I.getOperand(1));
3075 case Intrinsic::frameaddress:
3076 Out << "__builtin_frame_address(";
3077 writeOperand(I.getOperand(1));
3080 case Intrinsic::powi:
3081 Out << "__builtin_powi(";
3082 writeOperand(I.getOperand(1));
3084 writeOperand(I.getOperand(2));
3087 case Intrinsic::setjmp:
3088 Out << "setjmp(*(jmp_buf*)";
3089 writeOperand(I.getOperand(1));
3092 case Intrinsic::longjmp:
3093 Out << "longjmp(*(jmp_buf*)";
3094 writeOperand(I.getOperand(1));
3096 writeOperand(I.getOperand(2));
3099 case Intrinsic::prefetch:
3100 Out << "LLVM_PREFETCH((const void *)";
3101 writeOperand(I.getOperand(1));
3103 writeOperand(I.getOperand(2));
3105 writeOperand(I.getOperand(3));
3108 case Intrinsic::stacksave:
3109 // Emit this as: Val = 0; *((void**)&Val) = __builtin_stack_save()
3110 // to work around GCC bugs (see PR1809).
3111 Out << "0; *((void**)&" << GetValueName(&I)
3112 << ") = __builtin_stack_save()";
3114 case Intrinsic::dbg_stoppoint: {
3115 // If we use writeOperand directly we get a "u" suffix which is rejected
3117 std::stringstream SPIStr;
3118 DbgStopPointInst &SPI = cast<DbgStopPointInst>(I);
3119 SPI.getDirectory()->print(SPIStr);
3123 Out << SPIStr.str();
3125 SPI.getFileName()->print(SPIStr);
3126 Out << SPIStr.str() << "\"\n";
3129 case Intrinsic::x86_sse_cmp_ss:
3130 case Intrinsic::x86_sse_cmp_ps:
3131 case Intrinsic::x86_sse2_cmp_sd:
3132 case Intrinsic::x86_sse2_cmp_pd:
3134 printType(Out, I.getType());
3136 // Multiple GCC builtins multiplex onto this intrinsic.
3137 switch (cast<ConstantInt>(I.getOperand(3))->getZExtValue()) {
3138 default: llvm_unreachable("Invalid llvm.x86.sse.cmp!");
3139 case 0: Out << "__builtin_ia32_cmpeq"; break;
3140 case 1: Out << "__builtin_ia32_cmplt"; break;
3141 case 2: Out << "__builtin_ia32_cmple"; break;
3142 case 3: Out << "__builtin_ia32_cmpunord"; break;
3143 case 4: Out << "__builtin_ia32_cmpneq"; break;
3144 case 5: Out << "__builtin_ia32_cmpnlt"; break;
3145 case 6: Out << "__builtin_ia32_cmpnle"; break;
3146 case 7: Out << "__builtin_ia32_cmpord"; break;
3148 if (ID == Intrinsic::x86_sse_cmp_ps || ID == Intrinsic::x86_sse2_cmp_pd)
3152 if (ID == Intrinsic::x86_sse_cmp_ss || ID == Intrinsic::x86_sse_cmp_ps)
3158 writeOperand(I.getOperand(1));
3160 writeOperand(I.getOperand(2));
3163 case Intrinsic::ppc_altivec_lvsl:
3165 printType(Out, I.getType());
3167 Out << "__builtin_altivec_lvsl(0, (void*)";
3168 writeOperand(I.getOperand(1));
3174 //This converts the llvm constraint string to something gcc is expecting.
3175 //TODO: work out platform independent constraints and factor those out
3176 // of the per target tables
3177 // handle multiple constraint codes
3178 std::string CWriter::InterpretASMConstraint(InlineAsm::ConstraintInfo& c) {
3180 assert(c.Codes.size() == 1 && "Too many asm constraint codes to handle");
3182 const char *const *table = 0;
3184 // Grab the translation table from TargetAsmInfo if it exists.
3187 const Target *Match =
3188 TargetRegistry::lookupTarget(TheModule->getTargetTriple(),
3189 /*FallbackToHost=*/true,
3190 /*RequireJIT=*/false,
3193 // Per platform Target Machines don't exist, so create it;
3194 // this must be done only once.
3195 const TargetMachine* TM = Match->createTargetMachine(*TheModule, "");
3196 TAsm = TM->getTargetAsmInfo();
3200 table = TAsm->getAsmCBE();
3202 // Search the translation table if it exists.
3203 for (int i = 0; table && table[i]; i += 2)
3204 if (c.Codes[0] == table[i])
3207 // Default is identity.
3211 //TODO: import logic from AsmPrinter.cpp
3212 static std::string gccifyAsm(std::string asmstr) {
3213 for (std::string::size_type i = 0; i != asmstr.size(); ++i)
3214 if (asmstr[i] == '\n')
3215 asmstr.replace(i, 1, "\\n");
3216 else if (asmstr[i] == '\t')
3217 asmstr.replace(i, 1, "\\t");
3218 else if (asmstr[i] == '$') {
3219 if (asmstr[i + 1] == '{') {
3220 std::string::size_type a = asmstr.find_first_of(':', i + 1);
3221 std::string::size_type b = asmstr.find_first_of('}', i + 1);
3222 std::string n = "%" +
3223 asmstr.substr(a + 1, b - a - 1) +
3224 asmstr.substr(i + 2, a - i - 2);
3225 asmstr.replace(i, b - i + 1, n);
3228 asmstr.replace(i, 1, "%");
3230 else if (asmstr[i] == '%')//grr
3231 { asmstr.replace(i, 1, "%%"); ++i;}
3236 //TODO: assumptions about what consume arguments from the call are likely wrong
3237 // handle communitivity
3238 void CWriter::visitInlineAsm(CallInst &CI) {
3239 InlineAsm* as = cast<InlineAsm>(CI.getOperand(0));
3240 std::vector<InlineAsm::ConstraintInfo> Constraints = as->ParseConstraints();
3242 std::vector<std::pair<Value*, int> > ResultVals;
3243 if (CI.getType() == Type::VoidTy)
3245 else if (const StructType *ST = dyn_cast<StructType>(CI.getType())) {
3246 for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i)
3247 ResultVals.push_back(std::make_pair(&CI, (int)i));
3249 ResultVals.push_back(std::make_pair(&CI, -1));
3252 // Fix up the asm string for gcc and emit it.
3253 Out << "__asm__ volatile (\"" << gccifyAsm(as->getAsmString()) << "\"\n";
3256 unsigned ValueCount = 0;
3257 bool IsFirst = true;
3259 // Convert over all the output constraints.
3260 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3261 E = Constraints.end(); I != E; ++I) {
3263 if (I->Type != InlineAsm::isOutput) {
3265 continue; // Ignore non-output constraints.
3268 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3269 std::string C = InterpretASMConstraint(*I);
3270 if (C.empty()) continue;
3281 if (ValueCount < ResultVals.size()) {
3282 DestVal = ResultVals[ValueCount].first;
3283 DestValNo = ResultVals[ValueCount].second;
3285 DestVal = CI.getOperand(ValueCount-ResultVals.size()+1);
3287 if (I->isEarlyClobber)
3290 Out << "\"=" << C << "\"(" << GetValueName(DestVal);
3291 if (DestValNo != -1)
3292 Out << ".field" << DestValNo; // Multiple retvals.
3298 // Convert over all the input constraints.
3302 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3303 E = Constraints.end(); I != E; ++I) {
3304 if (I->Type != InlineAsm::isInput) {
3306 continue; // Ignore non-input constraints.
3309 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3310 std::string C = InterpretASMConstraint(*I);
3311 if (C.empty()) continue;
3318 assert(ValueCount >= ResultVals.size() && "Input can't refer to result");
3319 Value *SrcVal = CI.getOperand(ValueCount-ResultVals.size()+1);
3321 Out << "\"" << C << "\"(";
3323 writeOperand(SrcVal);
3325 writeOperandDeref(SrcVal);
3329 // Convert over the clobber constraints.
3332 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3333 E = Constraints.end(); I != E; ++I) {
3334 if (I->Type != InlineAsm::isClobber)
3335 continue; // Ignore non-input constraints.
3337 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3338 std::string C = InterpretASMConstraint(*I);
3339 if (C.empty()) continue;
3346 Out << '\"' << C << '"';
3352 void CWriter::visitMallocInst(MallocInst &I) {
3353 llvm_unreachable("lowerallocations pass didn't work!");
3356 void CWriter::visitAllocaInst(AllocaInst &I) {
3358 printType(Out, I.getType());
3359 Out << ") alloca(sizeof(";
3360 printType(Out, I.getType()->getElementType());
3362 if (I.isArrayAllocation()) {
3364 writeOperand(I.getOperand(0));
3369 void CWriter::visitFreeInst(FreeInst &I) {
3370 llvm_unreachable("lowerallocations pass didn't work!");
3373 void CWriter::printGEPExpression(Value *Ptr, gep_type_iterator I,
3374 gep_type_iterator E, bool Static) {
3376 // If there are no indices, just print out the pointer.
3382 // Find out if the last index is into a vector. If so, we have to print this
3383 // specially. Since vectors can't have elements of indexable type, only the
3384 // last index could possibly be of a vector element.
3385 const VectorType *LastIndexIsVector = 0;
3387 for (gep_type_iterator TmpI = I; TmpI != E; ++TmpI)
3388 LastIndexIsVector = dyn_cast<VectorType>(*TmpI);
3393 // If the last index is into a vector, we can't print it as &a[i][j] because
3394 // we can't index into a vector with j in GCC. Instead, emit this as
3395 // (((float*)&a[i])+j)
3396 if (LastIndexIsVector) {
3398 printType(Out, PointerType::getUnqual(LastIndexIsVector->getElementType()));
3404 // If the first index is 0 (very typical) we can do a number of
3405 // simplifications to clean up the code.
3406 Value *FirstOp = I.getOperand();
3407 if (!isa<Constant>(FirstOp) || !cast<Constant>(FirstOp)->isNullValue()) {
3408 // First index isn't simple, print it the hard way.
3411 ++I; // Skip the zero index.
3413 // Okay, emit the first operand. If Ptr is something that is already address
3414 // exposed, like a global, avoid emitting (&foo)[0], just emit foo instead.
3415 if (isAddressExposed(Ptr)) {
3416 writeOperandInternal(Ptr, Static);
3417 } else if (I != E && isa<StructType>(*I)) {
3418 // If we didn't already emit the first operand, see if we can print it as
3419 // P->f instead of "P[0].f"
3421 Out << "->field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3422 ++I; // eat the struct index as well.
3424 // Instead of emitting P[0][1], emit (*P)[1], which is more idiomatic.
3431 for (; I != E; ++I) {
3432 if (isa<StructType>(*I)) {
3433 Out << ".field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3434 } else if (isa<ArrayType>(*I)) {
3436 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3438 } else if (!isa<VectorType>(*I)) {
3440 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3443 // If the last index is into a vector, then print it out as "+j)". This
3444 // works with the 'LastIndexIsVector' code above.
3445 if (isa<Constant>(I.getOperand()) &&
3446 cast<Constant>(I.getOperand())->isNullValue()) {
3447 Out << "))"; // avoid "+0".
3450 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3458 void CWriter::writeMemoryAccess(Value *Operand, const Type *OperandType,
3459 bool IsVolatile, unsigned Alignment) {
3461 bool IsUnaligned = Alignment &&
3462 Alignment < TD->getABITypeAlignment(OperandType);
3466 if (IsVolatile || IsUnaligned) {
3469 Out << "struct __attribute__ ((packed, aligned(" << Alignment << "))) {";
3470 printType(Out, OperandType, false, IsUnaligned ? "data" : "volatile*");
3473 if (IsVolatile) Out << "volatile ";
3479 writeOperand(Operand);
3481 if (IsVolatile || IsUnaligned) {
3488 void CWriter::visitLoadInst(LoadInst &I) {
3489 writeMemoryAccess(I.getOperand(0), I.getType(), I.isVolatile(),
3494 void CWriter::visitStoreInst(StoreInst &I) {
3495 writeMemoryAccess(I.getPointerOperand(), I.getOperand(0)->getType(),
3496 I.isVolatile(), I.getAlignment());
3498 Value *Operand = I.getOperand(0);
3499 Constant *BitMask = 0;
3500 if (const IntegerType* ITy = dyn_cast<IntegerType>(Operand->getType()))
3501 if (!ITy->isPowerOf2ByteWidth())
3502 // We have a bit width that doesn't match an even power-of-2 byte
3503 // size. Consequently we must & the value with the type's bit mask
3504 BitMask = ConstantInt::get(ITy, ITy->getBitMask());
3507 writeOperand(Operand);
3510 printConstant(BitMask, false);
3515 void CWriter::visitGetElementPtrInst(GetElementPtrInst &I) {
3516 printGEPExpression(I.getPointerOperand(), gep_type_begin(I),
3517 gep_type_end(I), false);
3520 void CWriter::visitVAArgInst(VAArgInst &I) {
3521 Out << "va_arg(*(va_list*)";
3522 writeOperand(I.getOperand(0));
3524 printType(Out, I.getType());
3528 void CWriter::visitInsertElementInst(InsertElementInst &I) {
3529 const Type *EltTy = I.getType()->getElementType();
3530 writeOperand(I.getOperand(0));
3533 printType(Out, PointerType::getUnqual(EltTy));
3534 Out << ")(&" << GetValueName(&I) << "))[";
3535 writeOperand(I.getOperand(2));
3537 writeOperand(I.getOperand(1));
3541 void CWriter::visitExtractElementInst(ExtractElementInst &I) {
3542 // We know that our operand is not inlined.
3545 cast<VectorType>(I.getOperand(0)->getType())->getElementType();
3546 printType(Out, PointerType::getUnqual(EltTy));
3547 Out << ")(&" << GetValueName(I.getOperand(0)) << "))[";
3548 writeOperand(I.getOperand(1));
3552 void CWriter::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
3554 printType(Out, SVI.getType());
3556 const VectorType *VT = SVI.getType();
3557 unsigned NumElts = VT->getNumElements();
3558 const Type *EltTy = VT->getElementType();
3560 for (unsigned i = 0; i != NumElts; ++i) {
3562 int SrcVal = SVI.getMaskValue(i);
3563 if ((unsigned)SrcVal >= NumElts*2) {
3564 Out << " 0/*undef*/ ";
3566 Value *Op = SVI.getOperand((unsigned)SrcVal >= NumElts);
3567 if (isa<Instruction>(Op)) {
3568 // Do an extractelement of this value from the appropriate input.
3570 printType(Out, PointerType::getUnqual(EltTy));
3571 Out << ")(&" << GetValueName(Op)
3572 << "))[" << (SrcVal & (NumElts-1)) << "]";
3573 } else if (isa<ConstantAggregateZero>(Op) || isa<UndefValue>(Op)) {
3576 printConstant(cast<ConstantVector>(Op)->getOperand(SrcVal &
3585 void CWriter::visitInsertValueInst(InsertValueInst &IVI) {
3586 // Start by copying the entire aggregate value into the result variable.
3587 writeOperand(IVI.getOperand(0));
3590 // Then do the insert to update the field.
3591 Out << GetValueName(&IVI);
3592 for (const unsigned *b = IVI.idx_begin(), *i = b, *e = IVI.idx_end();
3594 const Type *IndexedTy =
3595 ExtractValueInst::getIndexedType(IVI.getOperand(0)->getType(), b, i+1);
3596 if (isa<ArrayType>(IndexedTy))
3597 Out << ".array[" << *i << "]";
3599 Out << ".field" << *i;
3602 writeOperand(IVI.getOperand(1));
3605 void CWriter::visitExtractValueInst(ExtractValueInst &EVI) {
3607 if (isa<UndefValue>(EVI.getOperand(0))) {
3609 printType(Out, EVI.getType());
3610 Out << ") 0/*UNDEF*/";
3612 Out << GetValueName(EVI.getOperand(0));
3613 for (const unsigned *b = EVI.idx_begin(), *i = b, *e = EVI.idx_end();
3615 const Type *IndexedTy =
3616 ExtractValueInst::getIndexedType(EVI.getOperand(0)->getType(), b, i+1);
3617 if (isa<ArrayType>(IndexedTy))
3618 Out << ".array[" << *i << "]";
3620 Out << ".field" << *i;
3626 //===----------------------------------------------------------------------===//
3627 // External Interface declaration
3628 //===----------------------------------------------------------------------===//
3630 bool CTargetMachine::addPassesToEmitWholeFile(PassManager &PM,
3631 formatted_raw_ostream &o,
3632 CodeGenFileType FileType,
3633 CodeGenOpt::Level OptLevel) {
3634 if (FileType != TargetMachine::AssemblyFile) return true;
3636 PM.add(createGCLoweringPass());
3637 PM.add(createLowerAllocationsPass(true));
3638 PM.add(createLowerInvokePass());
3639 PM.add(createCFGSimplificationPass()); // clean up after lower invoke.
3640 PM.add(new CBackendNameAllUsedStructsAndMergeFunctions());
3641 PM.add(new CWriter(o));
3642 PM.add(createGCInfoDeleter());