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/TargetMachineRegistry.h"
36 #include "llvm/Target/TargetRegistry.h"
37 #include "llvm/Support/CallSite.h"
38 #include "llvm/Support/CFG.h"
39 #include "llvm/Support/ErrorHandling.h"
40 #include "llvm/Support/FormattedStream.h"
41 #include "llvm/Support/GetElementPtrTypeIterator.h"
42 #include "llvm/Support/InstVisitor.h"
43 #include "llvm/Support/Mangler.h"
44 #include "llvm/Support/MathExtras.h"
45 #include "llvm/ADT/StringExtras.h"
46 #include "llvm/ADT/STLExtras.h"
47 #include "llvm/Support/MathExtras.h"
48 #include "llvm/Config/config.h"
53 // Register the target.
54 static RegisterTarget<CTargetMachine> X(TheCBackendTarget, "c", "C backend");
56 // Force static initialization.
57 extern "C" void LLVMInitializeCBackendTarget() { }
60 /// CBackendNameAllUsedStructsAndMergeFunctions - This pass inserts names for
61 /// any unnamed structure types that are used by the program, and merges
62 /// external functions with the same name.
64 class CBackendNameAllUsedStructsAndMergeFunctions : public ModulePass {
67 CBackendNameAllUsedStructsAndMergeFunctions()
69 void getAnalysisUsage(AnalysisUsage &AU) const {
70 AU.addRequired<FindUsedTypes>();
73 virtual const char *getPassName() const {
74 return "C backend type canonicalizer";
77 virtual bool runOnModule(Module &M);
80 char CBackendNameAllUsedStructsAndMergeFunctions::ID = 0;
82 /// CWriter - This class is the main chunk of code that converts an LLVM
83 /// module to a C translation unit.
84 class CWriter : public FunctionPass, public InstVisitor<CWriter> {
85 formatted_raw_ostream &Out;
86 IntrinsicLowering *IL;
89 const Module *TheModule;
90 const TargetAsmInfo* TAsm;
92 std::map<const Type *, std::string> TypeNames;
93 std::map<const ConstantFP *, unsigned> FPConstantMap;
94 std::set<Function*> intrinsicPrototypesAlreadyGenerated;
95 std::set<const Argument*> ByValParams;
97 unsigned OpaqueCounter;
98 DenseMap<const Value*, unsigned> AnonValueNumbers;
99 unsigned NextAnonValueNumber;
103 explicit CWriter(formatted_raw_ostream &o)
104 : FunctionPass(&ID), Out(o), IL(0), Mang(0), LI(0),
105 TheModule(0), TAsm(0), TD(0), OpaqueCounter(0), NextAnonValueNumber(0) {
109 virtual const char *getPassName() const { return "C backend"; }
111 void getAnalysisUsage(AnalysisUsage &AU) const {
112 AU.addRequired<LoopInfo>();
113 AU.setPreservesAll();
116 virtual bool doInitialization(Module &M);
118 bool runOnFunction(Function &F) {
119 // Do not codegen any 'available_externally' functions at all, they have
120 // definitions outside the translation unit.
121 if (F.hasAvailableExternallyLinkage())
124 LI = &getAnalysis<LoopInfo>();
126 // Get rid of intrinsics we can't handle.
129 // Output all floating point constants that cannot be printed accurately.
130 printFloatingPointConstants(F);
136 virtual bool doFinalization(Module &M) {
141 FPConstantMap.clear();
144 intrinsicPrototypesAlreadyGenerated.clear();
148 raw_ostream &printType(formatted_raw_ostream &Out,
150 bool isSigned = false,
151 const std::string &VariableName = "",
152 bool IgnoreName = false,
153 const AttrListPtr &PAL = AttrListPtr());
154 std::ostream &printType(std::ostream &Out, const Type *Ty,
155 bool isSigned = false,
156 const std::string &VariableName = "",
157 bool IgnoreName = false,
158 const AttrListPtr &PAL = AttrListPtr());
159 raw_ostream &printSimpleType(formatted_raw_ostream &Out,
162 const std::string &NameSoFar = "");
163 std::ostream &printSimpleType(std::ostream &Out, const Type *Ty,
165 const std::string &NameSoFar = "");
167 void printStructReturnPointerFunctionType(formatted_raw_ostream &Out,
168 const AttrListPtr &PAL,
169 const PointerType *Ty);
171 /// writeOperandDeref - Print the result of dereferencing the specified
172 /// operand with '*'. This is equivalent to printing '*' then using
173 /// writeOperand, but avoids excess syntax in some cases.
174 void writeOperandDeref(Value *Operand) {
175 if (isAddressExposed(Operand)) {
176 // Already something with an address exposed.
177 writeOperandInternal(Operand);
180 writeOperand(Operand);
185 void writeOperand(Value *Operand, bool Static = false);
186 void writeInstComputationInline(Instruction &I);
187 void writeOperandInternal(Value *Operand, bool Static = false);
188 void writeOperandWithCast(Value* Operand, unsigned Opcode);
189 void writeOperandWithCast(Value* Operand, const ICmpInst &I);
190 bool writeInstructionCast(const Instruction &I);
192 void writeMemoryAccess(Value *Operand, const Type *OperandType,
193 bool IsVolatile, unsigned Alignment);
196 std::string InterpretASMConstraint(InlineAsm::ConstraintInfo& c);
198 void lowerIntrinsics(Function &F);
200 void printModule(Module *M);
201 void printModuleTypes(const TypeSymbolTable &ST);
202 void printContainedStructs(const Type *Ty, std::set<const Type *> &);
203 void printFloatingPointConstants(Function &F);
204 void printFloatingPointConstants(const Constant *C);
205 void printFunctionSignature(const Function *F, bool Prototype);
207 void printFunction(Function &);
208 void printBasicBlock(BasicBlock *BB);
209 void printLoop(Loop *L);
211 void printCast(unsigned opcode, const Type *SrcTy, const Type *DstTy);
212 void printConstant(Constant *CPV, bool Static);
213 void printConstantWithCast(Constant *CPV, unsigned Opcode);
214 bool printConstExprCast(const ConstantExpr *CE, bool Static);
215 void printConstantArray(ConstantArray *CPA, bool Static);
216 void printConstantVector(ConstantVector *CV, bool Static);
218 /// isAddressExposed - Return true if the specified value's name needs to
219 /// have its address taken in order to get a C value of the correct type.
220 /// This happens for global variables, byval parameters, and direct allocas.
221 bool isAddressExposed(const Value *V) const {
222 if (const Argument *A = dyn_cast<Argument>(V))
223 return ByValParams.count(A);
224 return isa<GlobalVariable>(V) || isDirectAlloca(V);
227 // isInlinableInst - Attempt to inline instructions into their uses to build
228 // trees as much as possible. To do this, we have to consistently decide
229 // what is acceptable to inline, so that variable declarations don't get
230 // printed and an extra copy of the expr is not emitted.
232 static bool isInlinableInst(const Instruction &I) {
233 // Always inline cmp instructions, even if they are shared by multiple
234 // expressions. GCC generates horrible code if we don't.
238 // Must be an expression, must be used exactly once. If it is dead, we
239 // emit it inline where it would go.
240 if (I.getType() == Type::VoidTy || !I.hasOneUse() ||
241 isa<TerminatorInst>(I) || isa<CallInst>(I) || isa<PHINode>(I) ||
242 isa<LoadInst>(I) || isa<VAArgInst>(I) || isa<InsertElementInst>(I) ||
243 isa<InsertValueInst>(I))
244 // Don't inline a load across a store or other bad things!
247 // Must not be used in inline asm, extractelement, or shufflevector.
249 const Instruction &User = cast<Instruction>(*I.use_back());
250 if (isInlineAsm(User) || isa<ExtractElementInst>(User) ||
251 isa<ShuffleVectorInst>(User))
255 // Only inline instruction it if it's use is in the same BB as the inst.
256 return I.getParent() == cast<Instruction>(I.use_back())->getParent();
259 // isDirectAlloca - Define fixed sized allocas in the entry block as direct
260 // variables which are accessed with the & operator. This causes GCC to
261 // generate significantly better code than to emit alloca calls directly.
263 static const AllocaInst *isDirectAlloca(const Value *V) {
264 const AllocaInst *AI = dyn_cast<AllocaInst>(V);
265 if (!AI) return false;
266 if (AI->isArrayAllocation())
267 return 0; // FIXME: we can also inline fixed size array allocas!
268 if (AI->getParent() != &AI->getParent()->getParent()->getEntryBlock())
273 // isInlineAsm - Check if the instruction is a call to an inline asm chunk
274 static bool isInlineAsm(const Instruction& I) {
275 if (isa<CallInst>(&I) && isa<InlineAsm>(I.getOperand(0)))
280 // Instruction visitation functions
281 friend class InstVisitor<CWriter>;
283 void visitReturnInst(ReturnInst &I);
284 void visitBranchInst(BranchInst &I);
285 void visitSwitchInst(SwitchInst &I);
286 void visitInvokeInst(InvokeInst &I) {
287 llvm_unreachable("Lowerinvoke pass didn't work!");
290 void visitUnwindInst(UnwindInst &I) {
291 llvm_unreachable("Lowerinvoke pass didn't work!");
293 void visitUnreachableInst(UnreachableInst &I);
295 void visitPHINode(PHINode &I);
296 void visitBinaryOperator(Instruction &I);
297 void visitICmpInst(ICmpInst &I);
298 void visitFCmpInst(FCmpInst &I);
300 void visitCastInst (CastInst &I);
301 void visitSelectInst(SelectInst &I);
302 void visitCallInst (CallInst &I);
303 void visitInlineAsm(CallInst &I);
304 bool visitBuiltinCall(CallInst &I, Intrinsic::ID ID, bool &WroteCallee);
306 void visitMallocInst(MallocInst &I);
307 void visitAllocaInst(AllocaInst &I);
308 void visitFreeInst (FreeInst &I);
309 void visitLoadInst (LoadInst &I);
310 void visitStoreInst (StoreInst &I);
311 void visitGetElementPtrInst(GetElementPtrInst &I);
312 void visitVAArgInst (VAArgInst &I);
314 void visitInsertElementInst(InsertElementInst &I);
315 void visitExtractElementInst(ExtractElementInst &I);
316 void visitShuffleVectorInst(ShuffleVectorInst &SVI);
318 void visitInsertValueInst(InsertValueInst &I);
319 void visitExtractValueInst(ExtractValueInst &I);
321 void visitInstruction(Instruction &I) {
323 cerr << "C Writer does not know about " << I;
328 void outputLValue(Instruction *I) {
329 Out << " " << GetValueName(I) << " = ";
332 bool isGotoCodeNecessary(BasicBlock *From, BasicBlock *To);
333 void printPHICopiesForSuccessor(BasicBlock *CurBlock,
334 BasicBlock *Successor, unsigned Indent);
335 void printBranchToBlock(BasicBlock *CurBlock, BasicBlock *SuccBlock,
337 void printGEPExpression(Value *Ptr, gep_type_iterator I,
338 gep_type_iterator E, bool Static);
340 std::string GetValueName(const Value *Operand);
344 char CWriter::ID = 0;
346 /// This method inserts names for any unnamed structure types that are used by
347 /// the program, and removes names from structure types that are not used by the
350 bool CBackendNameAllUsedStructsAndMergeFunctions::runOnModule(Module &M) {
351 // Get a set of types that are used by the program...
352 std::set<const Type *> UT = getAnalysis<FindUsedTypes>().getTypes();
354 // Loop over the module symbol table, removing types from UT that are
355 // already named, and removing names for types that are not used.
357 TypeSymbolTable &TST = M.getTypeSymbolTable();
358 for (TypeSymbolTable::iterator TI = TST.begin(), TE = TST.end();
360 TypeSymbolTable::iterator I = TI++;
362 // If this isn't a struct or array type, remove it from our set of types
363 // to name. This simplifies emission later.
364 if (!isa<StructType>(I->second) && !isa<OpaqueType>(I->second) &&
365 !isa<ArrayType>(I->second)) {
368 // If this is not used, remove it from the symbol table.
369 std::set<const Type *>::iterator UTI = UT.find(I->second);
373 UT.erase(UTI); // Only keep one name for this type.
377 // UT now contains types that are not named. Loop over it, naming
380 bool Changed = false;
381 unsigned RenameCounter = 0;
382 for (std::set<const Type *>::const_iterator I = UT.begin(), E = UT.end();
384 if (isa<StructType>(*I) || isa<ArrayType>(*I)) {
385 while (M.addTypeName("unnamed"+utostr(RenameCounter), *I))
391 // Loop over all external functions and globals. If we have two with
392 // identical names, merge them.
393 // FIXME: This code should disappear when we don't allow values with the same
394 // names when they have different types!
395 std::map<std::string, GlobalValue*> ExtSymbols;
396 for (Module::iterator I = M.begin(), E = M.end(); I != E;) {
398 if (GV->isDeclaration() && GV->hasName()) {
399 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
400 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
402 // Found a conflict, replace this global with the previous one.
403 GlobalValue *OldGV = X.first->second;
404 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
405 GV->eraseFromParent();
410 // Do the same for globals.
411 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
413 GlobalVariable *GV = I++;
414 if (GV->isDeclaration() && GV->hasName()) {
415 std::pair<std::map<std::string, GlobalValue*>::iterator, bool> X
416 = ExtSymbols.insert(std::make_pair(GV->getName(), GV));
418 // Found a conflict, replace this global with the previous one.
419 GlobalValue *OldGV = X.first->second;
420 GV->replaceAllUsesWith(ConstantExpr::getBitCast(OldGV, GV->getType()));
421 GV->eraseFromParent();
430 /// printStructReturnPointerFunctionType - This is like printType for a struct
431 /// return type, except, instead of printing the type as void (*)(Struct*, ...)
432 /// print it as "Struct (*)(...)", for struct return functions.
433 void CWriter::printStructReturnPointerFunctionType(formatted_raw_ostream &Out,
434 const AttrListPtr &PAL,
435 const PointerType *TheTy) {
436 const FunctionType *FTy = cast<FunctionType>(TheTy->getElementType());
437 std::stringstream FunctionInnards;
438 FunctionInnards << " (*) (";
439 bool PrintedType = false;
441 FunctionType::param_iterator I = FTy->param_begin(), E = FTy->param_end();
442 const Type *RetTy = cast<PointerType>(I->get())->getElementType();
444 for (++I, ++Idx; I != E; ++I, ++Idx) {
446 FunctionInnards << ", ";
447 const Type *ArgTy = *I;
448 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
449 assert(isa<PointerType>(ArgTy));
450 ArgTy = cast<PointerType>(ArgTy)->getElementType();
452 printType(FunctionInnards, ArgTy,
453 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
456 if (FTy->isVarArg()) {
458 FunctionInnards << ", ...";
459 } else if (!PrintedType) {
460 FunctionInnards << "void";
462 FunctionInnards << ')';
463 std::string tstr = FunctionInnards.str();
464 printType(Out, RetTy,
465 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
469 CWriter::printSimpleType(formatted_raw_ostream &Out, const Type *Ty,
471 const std::string &NameSoFar) {
472 assert((Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) &&
473 "Invalid type for printSimpleType");
474 switch (Ty->getTypeID()) {
475 case Type::VoidTyID: return Out << "void " << NameSoFar;
476 case Type::IntegerTyID: {
477 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
479 return Out << "bool " << NameSoFar;
480 else if (NumBits <= 8)
481 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
482 else if (NumBits <= 16)
483 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
484 else if (NumBits <= 32)
485 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
486 else if (NumBits <= 64)
487 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
489 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
490 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
493 case Type::FloatTyID: return Out << "float " << NameSoFar;
494 case Type::DoubleTyID: return Out << "double " << NameSoFar;
495 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
496 // present matches host 'long double'.
497 case Type::X86_FP80TyID:
498 case Type::PPC_FP128TyID:
499 case Type::FP128TyID: return Out << "long double " << NameSoFar;
501 case Type::VectorTyID: {
502 const VectorType *VTy = cast<VectorType>(Ty);
503 return printSimpleType(Out, VTy->getElementType(), isSigned,
504 " __attribute__((vector_size(" +
505 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
510 cerr << "Unknown primitive type: " << *Ty << "\n";
517 CWriter::printSimpleType(std::ostream &Out, const Type *Ty, bool isSigned,
518 const std::string &NameSoFar) {
519 assert((Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) &&
520 "Invalid type for printSimpleType");
521 switch (Ty->getTypeID()) {
522 case Type::VoidTyID: return Out << "void " << NameSoFar;
523 case Type::IntegerTyID: {
524 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
526 return Out << "bool " << NameSoFar;
527 else if (NumBits <= 8)
528 return Out << (isSigned?"signed":"unsigned") << " char " << NameSoFar;
529 else if (NumBits <= 16)
530 return Out << (isSigned?"signed":"unsigned") << " short " << NameSoFar;
531 else if (NumBits <= 32)
532 return Out << (isSigned?"signed":"unsigned") << " int " << NameSoFar;
533 else if (NumBits <= 64)
534 return Out << (isSigned?"signed":"unsigned") << " long long "<< NameSoFar;
536 assert(NumBits <= 128 && "Bit widths > 128 not implemented yet");
537 return Out << (isSigned?"llvmInt128":"llvmUInt128") << " " << NameSoFar;
540 case Type::FloatTyID: return Out << "float " << NameSoFar;
541 case Type::DoubleTyID: return Out << "double " << NameSoFar;
542 // Lacking emulation of FP80 on PPC, etc., we assume whichever of these is
543 // present matches host 'long double'.
544 case Type::X86_FP80TyID:
545 case Type::PPC_FP128TyID:
546 case Type::FP128TyID: return Out << "long double " << NameSoFar;
548 case Type::VectorTyID: {
549 const VectorType *VTy = cast<VectorType>(Ty);
550 return printSimpleType(Out, VTy->getElementType(), isSigned,
551 " __attribute__((vector_size(" +
552 utostr(TD->getTypeAllocSize(VTy)) + " ))) " + NameSoFar);
557 cerr << "Unknown primitive type: " << *Ty << "\n";
563 // Pass the Type* and the variable name and this prints out the variable
566 raw_ostream &CWriter::printType(formatted_raw_ostream &Out,
568 bool isSigned, const std::string &NameSoFar,
569 bool IgnoreName, const AttrListPtr &PAL) {
570 if (Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) {
571 printSimpleType(Out, Ty, isSigned, NameSoFar);
575 // Check to see if the type is named.
576 if (!IgnoreName || isa<OpaqueType>(Ty)) {
577 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
578 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
581 switch (Ty->getTypeID()) {
582 case Type::FunctionTyID: {
583 const FunctionType *FTy = cast<FunctionType>(Ty);
584 std::stringstream FunctionInnards;
585 FunctionInnards << " (" << NameSoFar << ") (";
587 for (FunctionType::param_iterator I = FTy->param_begin(),
588 E = FTy->param_end(); I != E; ++I) {
589 const Type *ArgTy = *I;
590 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
591 assert(isa<PointerType>(ArgTy));
592 ArgTy = cast<PointerType>(ArgTy)->getElementType();
594 if (I != FTy->param_begin())
595 FunctionInnards << ", ";
596 printType(FunctionInnards, ArgTy,
597 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
600 if (FTy->isVarArg()) {
601 if (FTy->getNumParams())
602 FunctionInnards << ", ...";
603 } else if (!FTy->getNumParams()) {
604 FunctionInnards << "void";
606 FunctionInnards << ')';
607 std::string tstr = FunctionInnards.str();
608 printType(Out, FTy->getReturnType(),
609 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
612 case Type::StructTyID: {
613 const StructType *STy = cast<StructType>(Ty);
614 Out << NameSoFar + " {\n";
616 for (StructType::element_iterator I = STy->element_begin(),
617 E = STy->element_end(); I != E; ++I) {
619 printType(Out, *I, false, "field" + utostr(Idx++));
624 Out << " __attribute__ ((packed))";
628 case Type::PointerTyID: {
629 const PointerType *PTy = cast<PointerType>(Ty);
630 std::string ptrName = "*" + NameSoFar;
632 if (isa<ArrayType>(PTy->getElementType()) ||
633 isa<VectorType>(PTy->getElementType()))
634 ptrName = "(" + ptrName + ")";
637 // Must be a function ptr cast!
638 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
639 return printType(Out, PTy->getElementType(), false, ptrName);
642 case Type::ArrayTyID: {
643 const ArrayType *ATy = cast<ArrayType>(Ty);
644 unsigned NumElements = ATy->getNumElements();
645 if (NumElements == 0) NumElements = 1;
646 // Arrays are wrapped in structs to allow them to have normal
647 // value semantics (avoiding the array "decay").
648 Out << NameSoFar << " { ";
649 printType(Out, ATy->getElementType(), false,
650 "array[" + utostr(NumElements) + "]");
654 case Type::OpaqueTyID: {
655 std::string TyName = "struct opaque_" + itostr(OpaqueCounter++);
656 assert(TypeNames.find(Ty) == TypeNames.end());
657 TypeNames[Ty] = TyName;
658 return Out << TyName << ' ' << NameSoFar;
661 llvm_unreachable("Unhandled case in getTypeProps!");
667 // Pass the Type* and the variable name and this prints out the variable
670 std::ostream &CWriter::printType(std::ostream &Out, const Type *Ty,
671 bool isSigned, const std::string &NameSoFar,
672 bool IgnoreName, const AttrListPtr &PAL) {
673 if (Ty->isPrimitiveType() || Ty->isInteger() || isa<VectorType>(Ty)) {
674 printSimpleType(Out, Ty, isSigned, NameSoFar);
678 // Check to see if the type is named.
679 if (!IgnoreName || isa<OpaqueType>(Ty)) {
680 std::map<const Type *, std::string>::iterator I = TypeNames.find(Ty);
681 if (I != TypeNames.end()) return Out << I->second << ' ' << NameSoFar;
684 switch (Ty->getTypeID()) {
685 case Type::FunctionTyID: {
686 const FunctionType *FTy = cast<FunctionType>(Ty);
687 std::stringstream FunctionInnards;
688 FunctionInnards << " (" << NameSoFar << ") (";
690 for (FunctionType::param_iterator I = FTy->param_begin(),
691 E = FTy->param_end(); I != E; ++I) {
692 const Type *ArgTy = *I;
693 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
694 assert(isa<PointerType>(ArgTy));
695 ArgTy = cast<PointerType>(ArgTy)->getElementType();
697 if (I != FTy->param_begin())
698 FunctionInnards << ", ";
699 printType(FunctionInnards, ArgTy,
700 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt), "");
703 if (FTy->isVarArg()) {
704 if (FTy->getNumParams())
705 FunctionInnards << ", ...";
706 } else if (!FTy->getNumParams()) {
707 FunctionInnards << "void";
709 FunctionInnards << ')';
710 std::string tstr = FunctionInnards.str();
711 printType(Out, FTy->getReturnType(),
712 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt), tstr);
715 case Type::StructTyID: {
716 const StructType *STy = cast<StructType>(Ty);
717 Out << NameSoFar + " {\n";
719 for (StructType::element_iterator I = STy->element_begin(),
720 E = STy->element_end(); I != E; ++I) {
722 printType(Out, *I, false, "field" + utostr(Idx++));
727 Out << " __attribute__ ((packed))";
731 case Type::PointerTyID: {
732 const PointerType *PTy = cast<PointerType>(Ty);
733 std::string ptrName = "*" + NameSoFar;
735 if (isa<ArrayType>(PTy->getElementType()) ||
736 isa<VectorType>(PTy->getElementType()))
737 ptrName = "(" + ptrName + ")";
740 // Must be a function ptr cast!
741 return printType(Out, PTy->getElementType(), false, ptrName, true, PAL);
742 return printType(Out, PTy->getElementType(), false, ptrName);
745 case Type::ArrayTyID: {
746 const ArrayType *ATy = cast<ArrayType>(Ty);
747 unsigned NumElements = ATy->getNumElements();
748 if (NumElements == 0) NumElements = 1;
749 // Arrays are wrapped in structs to allow them to have normal
750 // value semantics (avoiding the array "decay").
751 Out << NameSoFar << " { ";
752 printType(Out, ATy->getElementType(), false,
753 "array[" + utostr(NumElements) + "]");
757 case Type::OpaqueTyID: {
758 std::string TyName = "struct opaque_" + itostr(OpaqueCounter++);
759 assert(TypeNames.find(Ty) == TypeNames.end());
760 TypeNames[Ty] = TyName;
761 return Out << TyName << ' ' << NameSoFar;
764 llvm_unreachable("Unhandled case in getTypeProps!");
770 void CWriter::printConstantArray(ConstantArray *CPA, bool Static) {
772 // As a special case, print the array as a string if it is an array of
773 // ubytes or an array of sbytes with positive values.
775 const Type *ETy = CPA->getType()->getElementType();
776 bool isString = (ETy == Type::Int8Ty || ETy == Type::Int8Ty);
778 // Make sure the last character is a null char, as automatically added by C
779 if (isString && (CPA->getNumOperands() == 0 ||
780 !cast<Constant>(*(CPA->op_end()-1))->isNullValue()))
785 // Keep track of whether the last number was a hexadecimal escape
786 bool LastWasHex = false;
788 // Do not include the last character, which we know is null
789 for (unsigned i = 0, e = CPA->getNumOperands()-1; i != e; ++i) {
790 unsigned char C = cast<ConstantInt>(CPA->getOperand(i))->getZExtValue();
792 // Print it out literally if it is a printable character. The only thing
793 // to be careful about is when the last letter output was a hex escape
794 // code, in which case we have to be careful not to print out hex digits
795 // explicitly (the C compiler thinks it is a continuation of the previous
796 // character, sheesh...)
798 if (isprint(C) && (!LastWasHex || !isxdigit(C))) {
800 if (C == '"' || C == '\\')
801 Out << "\\" << (char)C;
807 case '\n': Out << "\\n"; break;
808 case '\t': Out << "\\t"; break;
809 case '\r': Out << "\\r"; break;
810 case '\v': Out << "\\v"; break;
811 case '\a': Out << "\\a"; break;
812 case '\"': Out << "\\\""; break;
813 case '\'': Out << "\\\'"; break;
816 Out << (char)(( C/16 < 10) ? ( C/16 +'0') : ( C/16 -10+'A'));
817 Out << (char)(((C&15) < 10) ? ((C&15)+'0') : ((C&15)-10+'A'));
826 if (CPA->getNumOperands()) {
828 printConstant(cast<Constant>(CPA->getOperand(0)), Static);
829 for (unsigned i = 1, e = CPA->getNumOperands(); i != e; ++i) {
831 printConstant(cast<Constant>(CPA->getOperand(i)), Static);
838 void CWriter::printConstantVector(ConstantVector *CP, bool Static) {
840 if (CP->getNumOperands()) {
842 printConstant(cast<Constant>(CP->getOperand(0)), Static);
843 for (unsigned i = 1, e = CP->getNumOperands(); i != e; ++i) {
845 printConstant(cast<Constant>(CP->getOperand(i)), Static);
851 // isFPCSafeToPrint - Returns true if we may assume that CFP may be written out
852 // textually as a double (rather than as a reference to a stack-allocated
853 // variable). We decide this by converting CFP to a string and back into a
854 // double, and then checking whether the conversion results in a bit-equal
855 // double to the original value of CFP. This depends on us and the target C
856 // compiler agreeing on the conversion process (which is pretty likely since we
857 // only deal in IEEE FP).
859 static bool isFPCSafeToPrint(const ConstantFP *CFP) {
861 // Do long doubles in hex for now.
862 if (CFP->getType() != Type::FloatTy && CFP->getType() != Type::DoubleTy)
864 APFloat APF = APFloat(CFP->getValueAPF()); // copy
865 if (CFP->getType() == Type::FloatTy)
866 APF.convert(APFloat::IEEEdouble, APFloat::rmNearestTiesToEven, &ignored);
867 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
869 sprintf(Buffer, "%a", APF.convertToDouble());
870 if (!strncmp(Buffer, "0x", 2) ||
871 !strncmp(Buffer, "-0x", 3) ||
872 !strncmp(Buffer, "+0x", 3))
873 return APF.bitwiseIsEqual(APFloat(atof(Buffer)));
876 std::string StrVal = ftostr(APF);
878 while (StrVal[0] == ' ')
879 StrVal.erase(StrVal.begin());
881 // Check to make sure that the stringized number is not some string like "Inf"
882 // or NaN. Check that the string matches the "[-+]?[0-9]" regex.
883 if ((StrVal[0] >= '0' && StrVal[0] <= '9') ||
884 ((StrVal[0] == '-' || StrVal[0] == '+') &&
885 (StrVal[1] >= '0' && StrVal[1] <= '9')))
886 // Reparse stringized version!
887 return APF.bitwiseIsEqual(APFloat(atof(StrVal.c_str())));
892 /// Print out the casting for a cast operation. This does the double casting
893 /// necessary for conversion to the destination type, if necessary.
894 /// @brief Print a cast
895 void CWriter::printCast(unsigned opc, const Type *SrcTy, const Type *DstTy) {
896 // Print the destination type cast
898 case Instruction::UIToFP:
899 case Instruction::SIToFP:
900 case Instruction::IntToPtr:
901 case Instruction::Trunc:
902 case Instruction::BitCast:
903 case Instruction::FPExt:
904 case Instruction::FPTrunc: // For these the DstTy sign doesn't matter
906 printType(Out, DstTy);
909 case Instruction::ZExt:
910 case Instruction::PtrToInt:
911 case Instruction::FPToUI: // For these, make sure we get an unsigned dest
913 printSimpleType(Out, DstTy, false);
916 case Instruction::SExt:
917 case Instruction::FPToSI: // For these, make sure we get a signed dest
919 printSimpleType(Out, DstTy, true);
923 llvm_unreachable("Invalid cast opcode");
926 // Print the source type cast
928 case Instruction::UIToFP:
929 case Instruction::ZExt:
931 printSimpleType(Out, SrcTy, false);
934 case Instruction::SIToFP:
935 case Instruction::SExt:
937 printSimpleType(Out, SrcTy, true);
940 case Instruction::IntToPtr:
941 case Instruction::PtrToInt:
942 // Avoid "cast to pointer from integer of different size" warnings
943 Out << "(unsigned long)";
945 case Instruction::Trunc:
946 case Instruction::BitCast:
947 case Instruction::FPExt:
948 case Instruction::FPTrunc:
949 case Instruction::FPToSI:
950 case Instruction::FPToUI:
951 break; // These don't need a source cast.
953 llvm_unreachable("Invalid cast opcode");
958 // printConstant - The LLVM Constant to C Constant converter.
959 void CWriter::printConstant(Constant *CPV, bool Static) {
960 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(CPV)) {
961 switch (CE->getOpcode()) {
962 case Instruction::Trunc:
963 case Instruction::ZExt:
964 case Instruction::SExt:
965 case Instruction::FPTrunc:
966 case Instruction::FPExt:
967 case Instruction::UIToFP:
968 case Instruction::SIToFP:
969 case Instruction::FPToUI:
970 case Instruction::FPToSI:
971 case Instruction::PtrToInt:
972 case Instruction::IntToPtr:
973 case Instruction::BitCast:
975 printCast(CE->getOpcode(), CE->getOperand(0)->getType(), CE->getType());
976 if (CE->getOpcode() == Instruction::SExt &&
977 CE->getOperand(0)->getType() == Type::Int1Ty) {
978 // Make sure we really sext from bool here by subtracting from 0
981 printConstant(CE->getOperand(0), Static);
982 if (CE->getType() == Type::Int1Ty &&
983 (CE->getOpcode() == Instruction::Trunc ||
984 CE->getOpcode() == Instruction::FPToUI ||
985 CE->getOpcode() == Instruction::FPToSI ||
986 CE->getOpcode() == Instruction::PtrToInt)) {
987 // Make sure we really truncate to bool here by anding with 1
993 case Instruction::GetElementPtr:
995 printGEPExpression(CE->getOperand(0), gep_type_begin(CPV),
996 gep_type_end(CPV), Static);
999 case Instruction::Select:
1001 printConstant(CE->getOperand(0), Static);
1003 printConstant(CE->getOperand(1), Static);
1005 printConstant(CE->getOperand(2), Static);
1008 case Instruction::Add:
1009 case Instruction::FAdd:
1010 case Instruction::Sub:
1011 case Instruction::FSub:
1012 case Instruction::Mul:
1013 case Instruction::FMul:
1014 case Instruction::SDiv:
1015 case Instruction::UDiv:
1016 case Instruction::FDiv:
1017 case Instruction::URem:
1018 case Instruction::SRem:
1019 case Instruction::FRem:
1020 case Instruction::And:
1021 case Instruction::Or:
1022 case Instruction::Xor:
1023 case Instruction::ICmp:
1024 case Instruction::Shl:
1025 case Instruction::LShr:
1026 case Instruction::AShr:
1029 bool NeedsClosingParens = printConstExprCast(CE, Static);
1030 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
1031 switch (CE->getOpcode()) {
1032 case Instruction::Add:
1033 case Instruction::FAdd: Out << " + "; break;
1034 case Instruction::Sub:
1035 case Instruction::FSub: Out << " - "; break;
1036 case Instruction::Mul:
1037 case Instruction::FMul: Out << " * "; break;
1038 case Instruction::URem:
1039 case Instruction::SRem:
1040 case Instruction::FRem: Out << " % "; break;
1041 case Instruction::UDiv:
1042 case Instruction::SDiv:
1043 case Instruction::FDiv: Out << " / "; break;
1044 case Instruction::And: Out << " & "; break;
1045 case Instruction::Or: Out << " | "; break;
1046 case Instruction::Xor: Out << " ^ "; break;
1047 case Instruction::Shl: Out << " << "; break;
1048 case Instruction::LShr:
1049 case Instruction::AShr: Out << " >> "; break;
1050 case Instruction::ICmp:
1051 switch (CE->getPredicate()) {
1052 case ICmpInst::ICMP_EQ: Out << " == "; break;
1053 case ICmpInst::ICMP_NE: Out << " != "; break;
1054 case ICmpInst::ICMP_SLT:
1055 case ICmpInst::ICMP_ULT: Out << " < "; break;
1056 case ICmpInst::ICMP_SLE:
1057 case ICmpInst::ICMP_ULE: Out << " <= "; break;
1058 case ICmpInst::ICMP_SGT:
1059 case ICmpInst::ICMP_UGT: Out << " > "; break;
1060 case ICmpInst::ICMP_SGE:
1061 case ICmpInst::ICMP_UGE: Out << " >= "; break;
1062 default: llvm_unreachable("Illegal ICmp predicate");
1065 default: llvm_unreachable("Illegal opcode here!");
1067 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
1068 if (NeedsClosingParens)
1073 case Instruction::FCmp: {
1075 bool NeedsClosingParens = printConstExprCast(CE, Static);
1076 if (CE->getPredicate() == FCmpInst::FCMP_FALSE)
1078 else if (CE->getPredicate() == FCmpInst::FCMP_TRUE)
1082 switch (CE->getPredicate()) {
1083 default: llvm_unreachable("Illegal FCmp predicate");
1084 case FCmpInst::FCMP_ORD: op = "ord"; break;
1085 case FCmpInst::FCMP_UNO: op = "uno"; break;
1086 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
1087 case FCmpInst::FCMP_UNE: op = "une"; break;
1088 case FCmpInst::FCMP_ULT: op = "ult"; break;
1089 case FCmpInst::FCMP_ULE: op = "ule"; break;
1090 case FCmpInst::FCMP_UGT: op = "ugt"; break;
1091 case FCmpInst::FCMP_UGE: op = "uge"; break;
1092 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
1093 case FCmpInst::FCMP_ONE: op = "one"; break;
1094 case FCmpInst::FCMP_OLT: op = "olt"; break;
1095 case FCmpInst::FCMP_OLE: op = "ole"; break;
1096 case FCmpInst::FCMP_OGT: op = "ogt"; break;
1097 case FCmpInst::FCMP_OGE: op = "oge"; break;
1099 Out << "llvm_fcmp_" << op << "(";
1100 printConstantWithCast(CE->getOperand(0), CE->getOpcode());
1102 printConstantWithCast(CE->getOperand(1), CE->getOpcode());
1105 if (NeedsClosingParens)
1112 cerr << "CWriter Error: Unhandled constant expression: "
1115 llvm_unreachable(0);
1117 } else if (isa<UndefValue>(CPV) && CPV->getType()->isSingleValueType()) {
1119 printType(Out, CPV->getType()); // sign doesn't matter
1120 Out << ")/*UNDEF*/";
1121 if (!isa<VectorType>(CPV->getType())) {
1129 if (ConstantInt *CI = dyn_cast<ConstantInt>(CPV)) {
1130 const Type* Ty = CI->getType();
1131 if (Ty == Type::Int1Ty)
1132 Out << (CI->getZExtValue() ? '1' : '0');
1133 else if (Ty == Type::Int32Ty)
1134 Out << CI->getZExtValue() << 'u';
1135 else if (Ty->getPrimitiveSizeInBits() > 32)
1136 Out << CI->getZExtValue() << "ull";
1139 printSimpleType(Out, Ty, false) << ')';
1140 if (CI->isMinValue(true))
1141 Out << CI->getZExtValue() << 'u';
1143 Out << CI->getSExtValue();
1149 switch (CPV->getType()->getTypeID()) {
1150 case Type::FloatTyID:
1151 case Type::DoubleTyID:
1152 case Type::X86_FP80TyID:
1153 case Type::PPC_FP128TyID:
1154 case Type::FP128TyID: {
1155 ConstantFP *FPC = cast<ConstantFP>(CPV);
1156 std::map<const ConstantFP*, unsigned>::iterator I = FPConstantMap.find(FPC);
1157 if (I != FPConstantMap.end()) {
1158 // Because of FP precision problems we must load from a stack allocated
1159 // value that holds the value in hex.
1160 Out << "(*(" << (FPC->getType() == Type::FloatTy ? "float" :
1161 FPC->getType() == Type::DoubleTy ? "double" :
1163 << "*)&FPConstant" << I->second << ')';
1166 if (FPC->getType() == Type::FloatTy)
1167 V = FPC->getValueAPF().convertToFloat();
1168 else if (FPC->getType() == Type::DoubleTy)
1169 V = FPC->getValueAPF().convertToDouble();
1171 // Long double. Convert the number to double, discarding precision.
1172 // This is not awesome, but it at least makes the CBE output somewhat
1174 APFloat Tmp = FPC->getValueAPF();
1176 Tmp.convert(APFloat::IEEEdouble, APFloat::rmTowardZero, &LosesInfo);
1177 V = Tmp.convertToDouble();
1183 // FIXME the actual NaN bits should be emitted.
1184 // The prefix for a quiet NaN is 0x7FF8. For a signalling NaN,
1186 const unsigned long QuietNaN = 0x7ff8UL;
1187 //const unsigned long SignalNaN = 0x7ff4UL;
1189 // We need to grab the first part of the FP #
1192 uint64_t ll = DoubleToBits(V);
1193 sprintf(Buffer, "0x%llx", static_cast<long long>(ll));
1195 std::string Num(&Buffer[0], &Buffer[6]);
1196 unsigned long Val = strtoul(Num.c_str(), 0, 16);
1198 if (FPC->getType() == Type::FloatTy)
1199 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "F(\""
1200 << Buffer << "\") /*nan*/ ";
1202 Out << "LLVM_NAN" << (Val == QuietNaN ? "" : "S") << "(\""
1203 << Buffer << "\") /*nan*/ ";
1204 } else if (IsInf(V)) {
1206 if (V < 0) Out << '-';
1207 Out << "LLVM_INF" << (FPC->getType() == Type::FloatTy ? "F" : "")
1211 #if HAVE_PRINTF_A && ENABLE_CBE_PRINTF_A
1212 // Print out the constant as a floating point number.
1214 sprintf(Buffer, "%a", V);
1217 Num = ftostr(FPC->getValueAPF());
1225 case Type::ArrayTyID:
1226 // Use C99 compound expression literal initializer syntax.
1229 printType(Out, CPV->getType());
1232 Out << "{ "; // Arrays are wrapped in struct types.
1233 if (ConstantArray *CA = dyn_cast<ConstantArray>(CPV)) {
1234 printConstantArray(CA, Static);
1236 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1237 const ArrayType *AT = cast<ArrayType>(CPV->getType());
1239 if (AT->getNumElements()) {
1241 Constant *CZ = CPV->getContext().getNullValue(AT->getElementType());
1242 printConstant(CZ, Static);
1243 for (unsigned i = 1, e = AT->getNumElements(); i != e; ++i) {
1245 printConstant(CZ, Static);
1250 Out << " }"; // Arrays are wrapped in struct types.
1253 case Type::VectorTyID:
1254 // Use C99 compound expression literal initializer syntax.
1257 printType(Out, CPV->getType());
1260 if (ConstantVector *CV = dyn_cast<ConstantVector>(CPV)) {
1261 printConstantVector(CV, Static);
1263 assert(isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV));
1264 const VectorType *VT = cast<VectorType>(CPV->getType());
1266 Constant *CZ = CPV->getContext().getNullValue(VT->getElementType());
1267 printConstant(CZ, Static);
1268 for (unsigned i = 1, e = VT->getNumElements(); i != e; ++i) {
1270 printConstant(CZ, Static);
1276 case Type::StructTyID:
1277 // Use C99 compound expression literal initializer syntax.
1280 printType(Out, CPV->getType());
1283 if (isa<ConstantAggregateZero>(CPV) || isa<UndefValue>(CPV)) {
1284 const StructType *ST = cast<StructType>(CPV->getType());
1286 if (ST->getNumElements()) {
1289 CPV->getContext().getNullValue(ST->getElementType(0)), Static);
1290 for (unsigned i = 1, e = ST->getNumElements(); i != e; ++i) {
1293 CPV->getContext().getNullValue(ST->getElementType(i)), Static);
1299 if (CPV->getNumOperands()) {
1301 printConstant(cast<Constant>(CPV->getOperand(0)), Static);
1302 for (unsigned i = 1, e = CPV->getNumOperands(); i != e; ++i) {
1304 printConstant(cast<Constant>(CPV->getOperand(i)), Static);
1311 case Type::PointerTyID:
1312 if (isa<ConstantPointerNull>(CPV)) {
1314 printType(Out, CPV->getType()); // sign doesn't matter
1315 Out << ")/*NULL*/0)";
1317 } else if (GlobalValue *GV = dyn_cast<GlobalValue>(CPV)) {
1318 writeOperand(GV, Static);
1324 cerr << "Unknown constant type: " << *CPV << "\n";
1326 llvm_unreachable(0);
1330 // Some constant expressions need to be casted back to the original types
1331 // because their operands were casted to the expected type. This function takes
1332 // care of detecting that case and printing the cast for the ConstantExpr.
1333 bool CWriter::printConstExprCast(const ConstantExpr* CE, bool Static) {
1334 bool NeedsExplicitCast = false;
1335 const Type *Ty = CE->getOperand(0)->getType();
1336 bool TypeIsSigned = false;
1337 switch (CE->getOpcode()) {
1338 case Instruction::Add:
1339 case Instruction::Sub:
1340 case Instruction::Mul:
1341 // We need to cast integer arithmetic so that it is always performed
1342 // as unsigned, to avoid undefined behavior on overflow.
1343 case Instruction::LShr:
1344 case Instruction::URem:
1345 case Instruction::UDiv: NeedsExplicitCast = true; break;
1346 case Instruction::AShr:
1347 case Instruction::SRem:
1348 case Instruction::SDiv: NeedsExplicitCast = true; TypeIsSigned = true; break;
1349 case Instruction::SExt:
1351 NeedsExplicitCast = true;
1352 TypeIsSigned = true;
1354 case Instruction::ZExt:
1355 case Instruction::Trunc:
1356 case Instruction::FPTrunc:
1357 case Instruction::FPExt:
1358 case Instruction::UIToFP:
1359 case Instruction::SIToFP:
1360 case Instruction::FPToUI:
1361 case Instruction::FPToSI:
1362 case Instruction::PtrToInt:
1363 case Instruction::IntToPtr:
1364 case Instruction::BitCast:
1366 NeedsExplicitCast = true;
1370 if (NeedsExplicitCast) {
1372 if (Ty->isInteger() && Ty != Type::Int1Ty)
1373 printSimpleType(Out, Ty, TypeIsSigned);
1375 printType(Out, Ty); // not integer, sign doesn't matter
1378 return NeedsExplicitCast;
1381 // Print a constant assuming that it is the operand for a given Opcode. The
1382 // opcodes that care about sign need to cast their operands to the expected
1383 // type before the operation proceeds. This function does the casting.
1384 void CWriter::printConstantWithCast(Constant* CPV, unsigned Opcode) {
1386 // Extract the operand's type, we'll need it.
1387 const Type* OpTy = CPV->getType();
1389 // Indicate whether to do the cast or not.
1390 bool shouldCast = false;
1391 bool typeIsSigned = false;
1393 // Based on the Opcode for which this Constant is being written, determine
1394 // the new type to which the operand should be casted by setting the value
1395 // of OpTy. If we change OpTy, also set shouldCast to true so it gets
1399 // for most instructions, it doesn't matter
1401 case Instruction::Add:
1402 case Instruction::Sub:
1403 case Instruction::Mul:
1404 // We need to cast integer arithmetic so that it is always performed
1405 // as unsigned, to avoid undefined behavior on overflow.
1406 case Instruction::LShr:
1407 case Instruction::UDiv:
1408 case Instruction::URem:
1411 case Instruction::AShr:
1412 case Instruction::SDiv:
1413 case Instruction::SRem:
1415 typeIsSigned = true;
1419 // Write out the casted constant if we should, otherwise just write the
1423 printSimpleType(Out, OpTy, typeIsSigned);
1425 printConstant(CPV, false);
1428 printConstant(CPV, false);
1431 std::string CWriter::GetValueName(const Value *Operand) {
1432 // Mangle globals with the standard mangler interface for LLC compatibility.
1433 if (const GlobalValue *GV = dyn_cast<GlobalValue>(Operand))
1434 return Mang->getMangledName(GV);
1436 std::string Name = Operand->getName();
1438 if (Name.empty()) { // Assign unique names to local temporaries.
1439 unsigned &No = AnonValueNumbers[Operand];
1441 No = ++NextAnonValueNumber;
1442 Name = "tmp__" + utostr(No);
1445 std::string VarName;
1446 VarName.reserve(Name.capacity());
1448 for (std::string::iterator I = Name.begin(), E = Name.end();
1452 if (!((ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') ||
1453 (ch >= '0' && ch <= '9') || ch == '_')) {
1455 sprintf(buffer, "_%x_", ch);
1461 return "llvm_cbe_" + VarName;
1464 /// writeInstComputationInline - Emit the computation for the specified
1465 /// instruction inline, with no destination provided.
1466 void CWriter::writeInstComputationInline(Instruction &I) {
1467 // We can't currently support integer types other than 1, 8, 16, 32, 64.
1469 const Type *Ty = I.getType();
1470 if (Ty->isInteger() && (Ty!=Type::Int1Ty && Ty!=Type::Int8Ty &&
1471 Ty!=Type::Int16Ty && Ty!=Type::Int32Ty && Ty!=Type::Int64Ty)) {
1472 llvm_report_error("The C backend does not currently support integer "
1473 "types of widths other than 1, 8, 16, 32, 64.\n"
1474 "This is being tracked as PR 4158.");
1477 // If this is a non-trivial bool computation, make sure to truncate down to
1478 // a 1 bit value. This is important because we want "add i1 x, y" to return
1479 // "0" when x and y are true, not "2" for example.
1480 bool NeedBoolTrunc = false;
1481 if (I.getType() == Type::Int1Ty && !isa<ICmpInst>(I) && !isa<FCmpInst>(I))
1482 NeedBoolTrunc = true;
1494 void CWriter::writeOperandInternal(Value *Operand, bool Static) {
1495 if (Instruction *I = dyn_cast<Instruction>(Operand))
1496 // Should we inline this instruction to build a tree?
1497 if (isInlinableInst(*I) && !isDirectAlloca(I)) {
1499 writeInstComputationInline(*I);
1504 Constant* CPV = dyn_cast<Constant>(Operand);
1506 if (CPV && !isa<GlobalValue>(CPV))
1507 printConstant(CPV, Static);
1509 Out << GetValueName(Operand);
1512 void CWriter::writeOperand(Value *Operand, bool Static) {
1513 bool isAddressImplicit = isAddressExposed(Operand);
1514 if (isAddressImplicit)
1515 Out << "(&"; // Global variables are referenced as their addresses by llvm
1517 writeOperandInternal(Operand, Static);
1519 if (isAddressImplicit)
1523 // Some instructions need to have their result value casted back to the
1524 // original types because their operands were casted to the expected type.
1525 // This function takes care of detecting that case and printing the cast
1526 // for the Instruction.
1527 bool CWriter::writeInstructionCast(const Instruction &I) {
1528 const Type *Ty = I.getOperand(0)->getType();
1529 switch (I.getOpcode()) {
1530 case Instruction::Add:
1531 case Instruction::Sub:
1532 case Instruction::Mul:
1533 // We need to cast integer arithmetic so that it is always performed
1534 // as unsigned, to avoid undefined behavior on overflow.
1535 case Instruction::LShr:
1536 case Instruction::URem:
1537 case Instruction::UDiv:
1539 printSimpleType(Out, Ty, false);
1542 case Instruction::AShr:
1543 case Instruction::SRem:
1544 case Instruction::SDiv:
1546 printSimpleType(Out, Ty, true);
1554 // Write the operand with a cast to another type based on the Opcode being used.
1555 // This will be used in cases where an instruction has specific type
1556 // requirements (usually signedness) for its operands.
1557 void CWriter::writeOperandWithCast(Value* Operand, unsigned Opcode) {
1559 // Extract the operand's type, we'll need it.
1560 const Type* OpTy = Operand->getType();
1562 // Indicate whether to do the cast or not.
1563 bool shouldCast = false;
1565 // Indicate whether the cast should be to a signed type or not.
1566 bool castIsSigned = false;
1568 // Based on the Opcode for which this Operand is being written, determine
1569 // the new type to which the operand should be casted by setting the value
1570 // of OpTy. If we change OpTy, also set shouldCast to true.
1573 // for most instructions, it doesn't matter
1575 case Instruction::Add:
1576 case Instruction::Sub:
1577 case Instruction::Mul:
1578 // We need to cast integer arithmetic so that it is always performed
1579 // as unsigned, to avoid undefined behavior on overflow.
1580 case Instruction::LShr:
1581 case Instruction::UDiv:
1582 case Instruction::URem: // Cast to unsigned first
1584 castIsSigned = false;
1586 case Instruction::GetElementPtr:
1587 case Instruction::AShr:
1588 case Instruction::SDiv:
1589 case Instruction::SRem: // Cast to signed first
1591 castIsSigned = true;
1595 // Write out the casted operand if we should, otherwise just write the
1599 printSimpleType(Out, OpTy, castIsSigned);
1601 writeOperand(Operand);
1604 writeOperand(Operand);
1607 // Write the operand with a cast to another type based on the icmp predicate
1609 void CWriter::writeOperandWithCast(Value* Operand, const ICmpInst &Cmp) {
1610 // This has to do a cast to ensure the operand has the right signedness.
1611 // Also, if the operand is a pointer, we make sure to cast to an integer when
1612 // doing the comparison both for signedness and so that the C compiler doesn't
1613 // optimize things like "p < NULL" to false (p may contain an integer value
1615 bool shouldCast = Cmp.isRelational();
1617 // Write out the casted operand if we should, otherwise just write the
1620 writeOperand(Operand);
1624 // Should this be a signed comparison? If so, convert to signed.
1625 bool castIsSigned = Cmp.isSignedPredicate();
1627 // If the operand was a pointer, convert to a large integer type.
1628 const Type* OpTy = Operand->getType();
1629 if (isa<PointerType>(OpTy))
1630 OpTy = TD->getIntPtrType();
1633 printSimpleType(Out, OpTy, castIsSigned);
1635 writeOperand(Operand);
1639 // generateCompilerSpecificCode - This is where we add conditional compilation
1640 // directives to cater to specific compilers as need be.
1642 static void generateCompilerSpecificCode(formatted_raw_ostream& Out,
1643 const TargetData *TD) {
1644 // Alloca is hard to get, and we don't want to include stdlib.h here.
1645 Out << "/* get a declaration for alloca */\n"
1646 << "#if defined(__CYGWIN__) || defined(__MINGW32__)\n"
1647 << "#define alloca(x) __builtin_alloca((x))\n"
1648 << "#define _alloca(x) __builtin_alloca((x))\n"
1649 << "#elif defined(__APPLE__)\n"
1650 << "extern void *__builtin_alloca(unsigned long);\n"
1651 << "#define alloca(x) __builtin_alloca(x)\n"
1652 << "#define longjmp _longjmp\n"
1653 << "#define setjmp _setjmp\n"
1654 << "#elif defined(__sun__)\n"
1655 << "#if defined(__sparcv9)\n"
1656 << "extern void *__builtin_alloca(unsigned long);\n"
1658 << "extern void *__builtin_alloca(unsigned int);\n"
1660 << "#define alloca(x) __builtin_alloca(x)\n"
1661 << "#elif defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)\n"
1662 << "#define alloca(x) __builtin_alloca(x)\n"
1663 << "#elif defined(_MSC_VER)\n"
1664 << "#define inline _inline\n"
1665 << "#define alloca(x) _alloca(x)\n"
1667 << "#include <alloca.h>\n"
1670 // We output GCC specific attributes to preserve 'linkonce'ness on globals.
1671 // If we aren't being compiled with GCC, just drop these attributes.
1672 Out << "#ifndef __GNUC__ /* Can only support \"linkonce\" vars with GCC */\n"
1673 << "#define __attribute__(X)\n"
1676 // On Mac OS X, "external weak" is spelled "__attribute__((weak_import))".
1677 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1678 << "#define __EXTERNAL_WEAK__ __attribute__((weak_import))\n"
1679 << "#elif defined(__GNUC__)\n"
1680 << "#define __EXTERNAL_WEAK__ __attribute__((weak))\n"
1682 << "#define __EXTERNAL_WEAK__\n"
1685 // For now, turn off the weak linkage attribute on Mac OS X. (See above.)
1686 Out << "#if defined(__GNUC__) && defined(__APPLE_CC__)\n"
1687 << "#define __ATTRIBUTE_WEAK__\n"
1688 << "#elif defined(__GNUC__)\n"
1689 << "#define __ATTRIBUTE_WEAK__ __attribute__((weak))\n"
1691 << "#define __ATTRIBUTE_WEAK__\n"
1694 // Add hidden visibility support. FIXME: APPLE_CC?
1695 Out << "#if defined(__GNUC__)\n"
1696 << "#define __HIDDEN__ __attribute__((visibility(\"hidden\")))\n"
1699 // Define NaN and Inf as GCC builtins if using GCC, as 0 otherwise
1700 // From the GCC documentation:
1702 // double __builtin_nan (const char *str)
1704 // This is an implementation of the ISO C99 function nan.
1706 // Since ISO C99 defines this function in terms of strtod, which we do
1707 // not implement, a description of the parsing is in order. The string is
1708 // parsed as by strtol; that is, the base is recognized by leading 0 or
1709 // 0x prefixes. The number parsed is placed in the significand such that
1710 // the least significant bit of the number is at the least significant
1711 // bit of the significand. The number is truncated to fit the significand
1712 // field provided. The significand is forced to be a quiet NaN.
1714 // This function, if given a string literal, is evaluated early enough
1715 // that it is considered a compile-time constant.
1717 // float __builtin_nanf (const char *str)
1719 // Similar to __builtin_nan, except the return type is float.
1721 // double __builtin_inf (void)
1723 // Similar to __builtin_huge_val, except a warning is generated if the
1724 // target floating-point format does not support infinities. This
1725 // function is suitable for implementing the ISO C99 macro INFINITY.
1727 // float __builtin_inff (void)
1729 // Similar to __builtin_inf, except the return type is float.
1730 Out << "#ifdef __GNUC__\n"
1731 << "#define LLVM_NAN(NanStr) __builtin_nan(NanStr) /* Double */\n"
1732 << "#define LLVM_NANF(NanStr) __builtin_nanf(NanStr) /* Float */\n"
1733 << "#define LLVM_NANS(NanStr) __builtin_nans(NanStr) /* Double */\n"
1734 << "#define LLVM_NANSF(NanStr) __builtin_nansf(NanStr) /* Float */\n"
1735 << "#define LLVM_INF __builtin_inf() /* Double */\n"
1736 << "#define LLVM_INFF __builtin_inff() /* Float */\n"
1737 << "#define LLVM_PREFETCH(addr,rw,locality) "
1738 "__builtin_prefetch(addr,rw,locality)\n"
1739 << "#define __ATTRIBUTE_CTOR__ __attribute__((constructor))\n"
1740 << "#define __ATTRIBUTE_DTOR__ __attribute__((destructor))\n"
1741 << "#define LLVM_ASM __asm__\n"
1743 << "#define LLVM_NAN(NanStr) ((double)0.0) /* Double */\n"
1744 << "#define LLVM_NANF(NanStr) 0.0F /* Float */\n"
1745 << "#define LLVM_NANS(NanStr) ((double)0.0) /* Double */\n"
1746 << "#define LLVM_NANSF(NanStr) 0.0F /* Float */\n"
1747 << "#define LLVM_INF ((double)0.0) /* Double */\n"
1748 << "#define LLVM_INFF 0.0F /* Float */\n"
1749 << "#define LLVM_PREFETCH(addr,rw,locality) /* PREFETCH */\n"
1750 << "#define __ATTRIBUTE_CTOR__\n"
1751 << "#define __ATTRIBUTE_DTOR__\n"
1752 << "#define LLVM_ASM(X)\n"
1755 Out << "#if __GNUC__ < 4 /* Old GCC's, or compilers not GCC */ \n"
1756 << "#define __builtin_stack_save() 0 /* not implemented */\n"
1757 << "#define __builtin_stack_restore(X) /* noop */\n"
1760 // Output typedefs for 128-bit integers. If these are needed with a
1761 // 32-bit target or with a C compiler that doesn't support mode(TI),
1762 // more drastic measures will be needed.
1763 Out << "#if __GNUC__ && __LP64__ /* 128-bit integer types */\n"
1764 << "typedef int __attribute__((mode(TI))) llvmInt128;\n"
1765 << "typedef unsigned __attribute__((mode(TI))) llvmUInt128;\n"
1768 // Output target-specific code that should be inserted into main.
1769 Out << "#define CODE_FOR_MAIN() /* Any target-specific code for main()*/\n";
1772 /// FindStaticTors - Given a static ctor/dtor list, unpack its contents into
1773 /// the StaticTors set.
1774 static void FindStaticTors(GlobalVariable *GV, std::set<Function*> &StaticTors){
1775 ConstantArray *InitList = dyn_cast<ConstantArray>(GV->getInitializer());
1776 if (!InitList) return;
1778 for (unsigned i = 0, e = InitList->getNumOperands(); i != e; ++i)
1779 if (ConstantStruct *CS = dyn_cast<ConstantStruct>(InitList->getOperand(i))){
1780 if (CS->getNumOperands() != 2) return; // Not array of 2-element structs.
1782 if (CS->getOperand(1)->isNullValue())
1783 return; // Found a null terminator, exit printing.
1784 Constant *FP = CS->getOperand(1);
1785 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(FP))
1787 FP = CE->getOperand(0);
1788 if (Function *F = dyn_cast<Function>(FP))
1789 StaticTors.insert(F);
1793 enum SpecialGlobalClass {
1795 GlobalCtors, GlobalDtors,
1799 /// getGlobalVariableClass - If this is a global that is specially recognized
1800 /// by LLVM, return a code that indicates how we should handle it.
1801 static SpecialGlobalClass getGlobalVariableClass(const GlobalVariable *GV) {
1802 // If this is a global ctors/dtors list, handle it now.
1803 if (GV->hasAppendingLinkage() && GV->use_empty()) {
1804 if (GV->getName() == "llvm.global_ctors")
1806 else if (GV->getName() == "llvm.global_dtors")
1810 // Otherwise, it it is other metadata, don't print it. This catches things
1811 // like debug information.
1812 if (GV->getSection() == "llvm.metadata")
1819 bool CWriter::doInitialization(Module &M) {
1820 FunctionPass::doInitialization(M);
1825 TD = new TargetData(&M);
1826 IL = new IntrinsicLowering(*TD);
1827 IL->AddPrototypes(M);
1829 // Ensure that all structure types have names...
1830 Mang = new Mangler(M);
1831 Mang->markCharUnacceptable('.');
1833 // Keep track of which functions are static ctors/dtors so they can have
1834 // an attribute added to their prototypes.
1835 std::set<Function*> StaticCtors, StaticDtors;
1836 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1838 switch (getGlobalVariableClass(I)) {
1841 FindStaticTors(I, StaticCtors);
1844 FindStaticTors(I, StaticDtors);
1849 // get declaration for alloca
1850 Out << "/* Provide Declarations */\n";
1851 Out << "#include <stdarg.h>\n"; // Varargs support
1852 Out << "#include <setjmp.h>\n"; // Unwind support
1853 generateCompilerSpecificCode(Out, TD);
1855 // Provide a definition for `bool' if not compiling with a C++ compiler.
1857 << "#ifndef __cplusplus\ntypedef unsigned char bool;\n#endif\n"
1859 << "\n\n/* Support for floating point constants */\n"
1860 << "typedef unsigned long long ConstantDoubleTy;\n"
1861 << "typedef unsigned int ConstantFloatTy;\n"
1862 << "typedef struct { unsigned long long f1; unsigned short f2; "
1863 "unsigned short pad[3]; } ConstantFP80Ty;\n"
1864 // This is used for both kinds of 128-bit long double; meaning differs.
1865 << "typedef struct { unsigned long long f1; unsigned long long f2; }"
1866 " ConstantFP128Ty;\n"
1867 << "\n\n/* Global Declarations */\n";
1869 // First output all the declarations for the program, because C requires
1870 // Functions & globals to be declared before they are used.
1873 // Loop over the symbol table, emitting all named constants...
1874 printModuleTypes(M.getTypeSymbolTable());
1876 // Global variable declarations...
1877 if (!M.global_empty()) {
1878 Out << "\n/* External Global Variable Declarations */\n";
1879 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1882 if (I->hasExternalLinkage() || I->hasExternalWeakLinkage() ||
1883 I->hasCommonLinkage())
1885 else if (I->hasDLLImportLinkage())
1886 Out << "__declspec(dllimport) ";
1888 continue; // Internal Global
1890 // Thread Local Storage
1891 if (I->isThreadLocal())
1894 printType(Out, I->getType()->getElementType(), false, GetValueName(I));
1896 if (I->hasExternalWeakLinkage())
1897 Out << " __EXTERNAL_WEAK__";
1902 // Function declarations
1903 Out << "\n/* Function Declarations */\n";
1904 Out << "double fmod(double, double);\n"; // Support for FP rem
1905 Out << "float fmodf(float, float);\n";
1906 Out << "long double fmodl(long double, long double);\n";
1908 for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I) {
1909 // Don't print declarations for intrinsic functions.
1910 if (!I->isIntrinsic() && I->getName() != "setjmp" &&
1911 I->getName() != "longjmp" && I->getName() != "_setjmp") {
1912 if (I->hasExternalWeakLinkage())
1914 printFunctionSignature(I, true);
1915 if (I->hasWeakLinkage() || I->hasLinkOnceLinkage())
1916 Out << " __ATTRIBUTE_WEAK__";
1917 if (I->hasExternalWeakLinkage())
1918 Out << " __EXTERNAL_WEAK__";
1919 if (StaticCtors.count(I))
1920 Out << " __ATTRIBUTE_CTOR__";
1921 if (StaticDtors.count(I))
1922 Out << " __ATTRIBUTE_DTOR__";
1923 if (I->hasHiddenVisibility())
1924 Out << " __HIDDEN__";
1926 if (I->hasName() && I->getName()[0] == 1)
1927 Out << " LLVM_ASM(\"" << I->getName().substr(1) << "\")";
1933 // Output the global variable declarations
1934 if (!M.global_empty()) {
1935 Out << "\n\n/* Global Variable Declarations */\n";
1936 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1938 if (!I->isDeclaration()) {
1939 // Ignore special globals, such as debug info.
1940 if (getGlobalVariableClass(I))
1943 if (I->hasLocalLinkage())
1948 // Thread Local Storage
1949 if (I->isThreadLocal())
1952 printType(Out, I->getType()->getElementType(), false,
1955 if (I->hasLinkOnceLinkage())
1956 Out << " __attribute__((common))";
1957 else if (I->hasCommonLinkage()) // FIXME is this right?
1958 Out << " __ATTRIBUTE_WEAK__";
1959 else if (I->hasWeakLinkage())
1960 Out << " __ATTRIBUTE_WEAK__";
1961 else if (I->hasExternalWeakLinkage())
1962 Out << " __EXTERNAL_WEAK__";
1963 if (I->hasHiddenVisibility())
1964 Out << " __HIDDEN__";
1969 // Output the global variable definitions and contents...
1970 if (!M.global_empty()) {
1971 Out << "\n\n/* Global Variable Definitions and Initialization */\n";
1972 for (Module::global_iterator I = M.global_begin(), E = M.global_end();
1974 if (!I->isDeclaration()) {
1975 // Ignore special globals, such as debug info.
1976 if (getGlobalVariableClass(I))
1979 if (I->hasLocalLinkage())
1981 else if (I->hasDLLImportLinkage())
1982 Out << "__declspec(dllimport) ";
1983 else if (I->hasDLLExportLinkage())
1984 Out << "__declspec(dllexport) ";
1986 // Thread Local Storage
1987 if (I->isThreadLocal())
1990 printType(Out, I->getType()->getElementType(), false,
1992 if (I->hasLinkOnceLinkage())
1993 Out << " __attribute__((common))";
1994 else if (I->hasWeakLinkage())
1995 Out << " __ATTRIBUTE_WEAK__";
1996 else if (I->hasCommonLinkage())
1997 Out << " __ATTRIBUTE_WEAK__";
1999 if (I->hasHiddenVisibility())
2000 Out << " __HIDDEN__";
2002 // If the initializer is not null, emit the initializer. If it is null,
2003 // we try to avoid emitting large amounts of zeros. The problem with
2004 // this, however, occurs when the variable has weak linkage. In this
2005 // case, the assembler will complain about the variable being both weak
2006 // and common, so we disable this optimization.
2007 // FIXME common linkage should avoid this problem.
2008 if (!I->getInitializer()->isNullValue()) {
2010 writeOperand(I->getInitializer(), true);
2011 } else if (I->hasWeakLinkage()) {
2012 // We have to specify an initializer, but it doesn't have to be
2013 // complete. If the value is an aggregate, print out { 0 }, and let
2014 // the compiler figure out the rest of the zeros.
2016 if (isa<StructType>(I->getInitializer()->getType()) ||
2017 isa<VectorType>(I->getInitializer()->getType())) {
2019 } else if (isa<ArrayType>(I->getInitializer()->getType())) {
2020 // As with structs and vectors, but with an extra set of braces
2021 // because arrays are wrapped in structs.
2024 // Just print it out normally.
2025 writeOperand(I->getInitializer(), true);
2033 Out << "\n\n/* Function Bodies */\n";
2035 // Emit some helper functions for dealing with FCMP instruction's
2037 Out << "static inline int llvm_fcmp_ord(double X, double Y) { ";
2038 Out << "return X == X && Y == Y; }\n";
2039 Out << "static inline int llvm_fcmp_uno(double X, double Y) { ";
2040 Out << "return X != X || Y != Y; }\n";
2041 Out << "static inline int llvm_fcmp_ueq(double X, double Y) { ";
2042 Out << "return X == Y || llvm_fcmp_uno(X, Y); }\n";
2043 Out << "static inline int llvm_fcmp_une(double X, double Y) { ";
2044 Out << "return X != Y; }\n";
2045 Out << "static inline int llvm_fcmp_ult(double X, double Y) { ";
2046 Out << "return X < Y || llvm_fcmp_uno(X, Y); }\n";
2047 Out << "static inline int llvm_fcmp_ugt(double X, double Y) { ";
2048 Out << "return X > Y || llvm_fcmp_uno(X, Y); }\n";
2049 Out << "static inline int llvm_fcmp_ule(double X, double Y) { ";
2050 Out << "return X <= Y || llvm_fcmp_uno(X, Y); }\n";
2051 Out << "static inline int llvm_fcmp_uge(double X, double Y) { ";
2052 Out << "return X >= Y || llvm_fcmp_uno(X, Y); }\n";
2053 Out << "static inline int llvm_fcmp_oeq(double X, double Y) { ";
2054 Out << "return X == Y ; }\n";
2055 Out << "static inline int llvm_fcmp_one(double X, double Y) { ";
2056 Out << "return X != Y && llvm_fcmp_ord(X, Y); }\n";
2057 Out << "static inline int llvm_fcmp_olt(double X, double Y) { ";
2058 Out << "return X < Y ; }\n";
2059 Out << "static inline int llvm_fcmp_ogt(double X, double Y) { ";
2060 Out << "return X > Y ; }\n";
2061 Out << "static inline int llvm_fcmp_ole(double X, double Y) { ";
2062 Out << "return X <= Y ; }\n";
2063 Out << "static inline int llvm_fcmp_oge(double X, double Y) { ";
2064 Out << "return X >= Y ; }\n";
2069 /// Output all floating point constants that cannot be printed accurately...
2070 void CWriter::printFloatingPointConstants(Function &F) {
2071 // Scan the module for floating point constants. If any FP constant is used
2072 // in the function, we want to redirect it here so that we do not depend on
2073 // the precision of the printed form, unless the printed form preserves
2076 for (constant_iterator I = constant_begin(&F), E = constant_end(&F);
2078 printFloatingPointConstants(*I);
2083 void CWriter::printFloatingPointConstants(const Constant *C) {
2084 // If this is a constant expression, recursively check for constant fp values.
2085 if (const ConstantExpr *CE = dyn_cast<ConstantExpr>(C)) {
2086 for (unsigned i = 0, e = CE->getNumOperands(); i != e; ++i)
2087 printFloatingPointConstants(CE->getOperand(i));
2091 // Otherwise, check for a FP constant that we need to print.
2092 const ConstantFP *FPC = dyn_cast<ConstantFP>(C);
2094 // Do not put in FPConstantMap if safe.
2095 isFPCSafeToPrint(FPC) ||
2096 // Already printed this constant?
2097 FPConstantMap.count(FPC))
2100 FPConstantMap[FPC] = FPCounter; // Number the FP constants
2102 if (FPC->getType() == Type::DoubleTy) {
2103 double Val = FPC->getValueAPF().convertToDouble();
2104 uint64_t i = FPC->getValueAPF().bitcastToAPInt().getZExtValue();
2105 Out << "static const ConstantDoubleTy FPConstant" << FPCounter++
2106 << " = 0x" << utohexstr(i)
2107 << "ULL; /* " << Val << " */\n";
2108 } else if (FPC->getType() == Type::FloatTy) {
2109 float Val = FPC->getValueAPF().convertToFloat();
2110 uint32_t i = (uint32_t)FPC->getValueAPF().bitcastToAPInt().
2112 Out << "static const ConstantFloatTy FPConstant" << FPCounter++
2113 << " = 0x" << utohexstr(i)
2114 << "U; /* " << Val << " */\n";
2115 } else if (FPC->getType() == Type::X86_FP80Ty) {
2116 // api needed to prevent premature destruction
2117 APInt api = FPC->getValueAPF().bitcastToAPInt();
2118 const uint64_t *p = api.getRawData();
2119 Out << "static const ConstantFP80Ty FPConstant" << FPCounter++
2120 << " = { 0x" << utohexstr(p[0])
2121 << "ULL, 0x" << utohexstr((uint16_t)p[1]) << ",{0,0,0}"
2122 << "}; /* Long double constant */\n";
2123 } else if (FPC->getType() == Type::PPC_FP128Ty) {
2124 APInt api = FPC->getValueAPF().bitcastToAPInt();
2125 const uint64_t *p = api.getRawData();
2126 Out << "static const ConstantFP128Ty FPConstant" << FPCounter++
2128 << utohexstr(p[0]) << ", 0x" << utohexstr(p[1])
2129 << "}; /* Long double constant */\n";
2132 llvm_unreachable("Unknown float type!");
2138 /// printSymbolTable - Run through symbol table looking for type names. If a
2139 /// type name is found, emit its declaration...
2141 void CWriter::printModuleTypes(const TypeSymbolTable &TST) {
2142 Out << "/* Helper union for bitcasts */\n";
2143 Out << "typedef union {\n";
2144 Out << " unsigned int Int32;\n";
2145 Out << " unsigned long long Int64;\n";
2146 Out << " float Float;\n";
2147 Out << " double Double;\n";
2148 Out << "} llvmBitCastUnion;\n";
2150 // We are only interested in the type plane of the symbol table.
2151 TypeSymbolTable::const_iterator I = TST.begin();
2152 TypeSymbolTable::const_iterator End = TST.end();
2154 // If there are no type names, exit early.
2155 if (I == End) return;
2157 // Print out forward declarations for structure types before anything else!
2158 Out << "/* Structure forward decls */\n";
2159 for (; I != End; ++I) {
2160 std::string Name = "struct l_" + Mang->makeNameProper(I->first);
2161 Out << Name << ";\n";
2162 TypeNames.insert(std::make_pair(I->second, Name));
2167 // Now we can print out typedefs. Above, we guaranteed that this can only be
2168 // for struct or opaque types.
2169 Out << "/* Typedefs */\n";
2170 for (I = TST.begin(); I != End; ++I) {
2171 std::string Name = "l_" + Mang->makeNameProper(I->first);
2173 printType(Out, I->second, false, Name);
2179 // Keep track of which structures have been printed so far...
2180 std::set<const Type *> StructPrinted;
2182 // Loop over all structures then push them into the stack so they are
2183 // printed in the correct order.
2185 Out << "/* Structure contents */\n";
2186 for (I = TST.begin(); I != End; ++I)
2187 if (isa<StructType>(I->second) || isa<ArrayType>(I->second))
2188 // Only print out used types!
2189 printContainedStructs(I->second, StructPrinted);
2192 // Push the struct onto the stack and recursively push all structs
2193 // this one depends on.
2195 // TODO: Make this work properly with vector types
2197 void CWriter::printContainedStructs(const Type *Ty,
2198 std::set<const Type*> &StructPrinted) {
2199 // Don't walk through pointers.
2200 if (isa<PointerType>(Ty) || Ty->isPrimitiveType() || Ty->isInteger()) return;
2202 // Print all contained types first.
2203 for (Type::subtype_iterator I = Ty->subtype_begin(),
2204 E = Ty->subtype_end(); I != E; ++I)
2205 printContainedStructs(*I, StructPrinted);
2207 if (isa<StructType>(Ty) || isa<ArrayType>(Ty)) {
2208 // Check to see if we have already printed this struct.
2209 if (StructPrinted.insert(Ty).second) {
2210 // Print structure type out.
2211 std::string Name = TypeNames[Ty];
2212 printType(Out, Ty, false, Name, true);
2218 void CWriter::printFunctionSignature(const Function *F, bool Prototype) {
2219 /// isStructReturn - Should this function actually return a struct by-value?
2220 bool isStructReturn = F->hasStructRetAttr();
2222 if (F->hasLocalLinkage()) Out << "static ";
2223 if (F->hasDLLImportLinkage()) Out << "__declspec(dllimport) ";
2224 if (F->hasDLLExportLinkage()) Out << "__declspec(dllexport) ";
2225 switch (F->getCallingConv()) {
2226 case CallingConv::X86_StdCall:
2227 Out << "__attribute__((stdcall)) ";
2229 case CallingConv::X86_FastCall:
2230 Out << "__attribute__((fastcall)) ";
2234 // Loop over the arguments, printing them...
2235 const FunctionType *FT = cast<FunctionType>(F->getFunctionType());
2236 const AttrListPtr &PAL = F->getAttributes();
2238 std::stringstream FunctionInnards;
2240 // Print out the name...
2241 FunctionInnards << GetValueName(F) << '(';
2243 bool PrintedArg = false;
2244 if (!F->isDeclaration()) {
2245 if (!F->arg_empty()) {
2246 Function::const_arg_iterator I = F->arg_begin(), E = F->arg_end();
2249 // If this is a struct-return function, don't print the hidden
2250 // struct-return argument.
2251 if (isStructReturn) {
2252 assert(I != E && "Invalid struct return function!");
2257 std::string ArgName;
2258 for (; I != E; ++I) {
2259 if (PrintedArg) FunctionInnards << ", ";
2260 if (I->hasName() || !Prototype)
2261 ArgName = GetValueName(I);
2264 const Type *ArgTy = I->getType();
2265 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2266 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2267 ByValParams.insert(I);
2269 printType(FunctionInnards, ArgTy,
2270 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt),
2277 // Loop over the arguments, printing them.
2278 FunctionType::param_iterator I = FT->param_begin(), E = FT->param_end();
2281 // If this is a struct-return function, don't print the hidden
2282 // struct-return argument.
2283 if (isStructReturn) {
2284 assert(I != E && "Invalid struct return function!");
2289 for (; I != E; ++I) {
2290 if (PrintedArg) FunctionInnards << ", ";
2291 const Type *ArgTy = *I;
2292 if (PAL.paramHasAttr(Idx, Attribute::ByVal)) {
2293 assert(isa<PointerType>(ArgTy));
2294 ArgTy = cast<PointerType>(ArgTy)->getElementType();
2296 printType(FunctionInnards, ArgTy,
2297 /*isSigned=*/PAL.paramHasAttr(Idx, Attribute::SExt));
2303 // Finish printing arguments... if this is a vararg function, print the ...,
2304 // unless there are no known types, in which case, we just emit ().
2306 if (FT->isVarArg() && PrintedArg) {
2307 if (PrintedArg) FunctionInnards << ", ";
2308 FunctionInnards << "..."; // Output varargs portion of signature!
2309 } else if (!FT->isVarArg() && !PrintedArg) {
2310 FunctionInnards << "void"; // ret() -> ret(void) in C.
2312 FunctionInnards << ')';
2314 // Get the return tpe for the function.
2316 if (!isStructReturn)
2317 RetTy = F->getReturnType();
2319 // If this is a struct-return function, print the struct-return type.
2320 RetTy = cast<PointerType>(FT->getParamType(0))->getElementType();
2323 // Print out the return type and the signature built above.
2324 printType(Out, RetTy,
2325 /*isSigned=*/PAL.paramHasAttr(0, Attribute::SExt),
2326 FunctionInnards.str());
2329 static inline bool isFPIntBitCast(const Instruction &I) {
2330 if (!isa<BitCastInst>(I))
2332 const Type *SrcTy = I.getOperand(0)->getType();
2333 const Type *DstTy = I.getType();
2334 return (SrcTy->isFloatingPoint() && DstTy->isInteger()) ||
2335 (DstTy->isFloatingPoint() && SrcTy->isInteger());
2338 void CWriter::printFunction(Function &F) {
2339 /// isStructReturn - Should this function actually return a struct by-value?
2340 bool isStructReturn = F.hasStructRetAttr();
2342 printFunctionSignature(&F, false);
2345 // If this is a struct return function, handle the result with magic.
2346 if (isStructReturn) {
2347 const Type *StructTy =
2348 cast<PointerType>(F.arg_begin()->getType())->getElementType();
2350 printType(Out, StructTy, false, "StructReturn");
2351 Out << "; /* Struct return temporary */\n";
2354 printType(Out, F.arg_begin()->getType(), false,
2355 GetValueName(F.arg_begin()));
2356 Out << " = &StructReturn;\n";
2359 bool PrintedVar = false;
2361 // print local variable information for the function
2362 for (inst_iterator I = inst_begin(&F), E = inst_end(&F); I != E; ++I) {
2363 if (const AllocaInst *AI = isDirectAlloca(&*I)) {
2365 printType(Out, AI->getAllocatedType(), false, GetValueName(AI));
2366 Out << "; /* Address-exposed local */\n";
2368 } else if (I->getType() != Type::VoidTy && !isInlinableInst(*I)) {
2370 printType(Out, I->getType(), false, GetValueName(&*I));
2373 if (isa<PHINode>(*I)) { // Print out PHI node temporaries as well...
2375 printType(Out, I->getType(), false,
2376 GetValueName(&*I)+"__PHI_TEMPORARY");
2381 // We need a temporary for the BitCast to use so it can pluck a value out
2382 // of a union to do the BitCast. This is separate from the need for a
2383 // variable to hold the result of the BitCast.
2384 if (isFPIntBitCast(*I)) {
2385 Out << " llvmBitCastUnion " << GetValueName(&*I)
2386 << "__BITCAST_TEMPORARY;\n";
2394 if (F.hasExternalLinkage() && F.getName() == "main")
2395 Out << " CODE_FOR_MAIN();\n";
2397 // print the basic blocks
2398 for (Function::iterator BB = F.begin(), E = F.end(); BB != E; ++BB) {
2399 if (Loop *L = LI->getLoopFor(BB)) {
2400 if (L->getHeader() == BB && L->getParentLoop() == 0)
2403 printBasicBlock(BB);
2410 void CWriter::printLoop(Loop *L) {
2411 Out << " do { /* Syntactic loop '" << L->getHeader()->getName()
2412 << "' to make GCC happy */\n";
2413 for (unsigned i = 0, e = L->getBlocks().size(); i != e; ++i) {
2414 BasicBlock *BB = L->getBlocks()[i];
2415 Loop *BBLoop = LI->getLoopFor(BB);
2417 printBasicBlock(BB);
2418 else if (BB == BBLoop->getHeader() && BBLoop->getParentLoop() == L)
2421 Out << " } while (1); /* end of syntactic loop '"
2422 << L->getHeader()->getName() << "' */\n";
2425 void CWriter::printBasicBlock(BasicBlock *BB) {
2427 // Don't print the label for the basic block if there are no uses, or if
2428 // the only terminator use is the predecessor basic block's terminator.
2429 // We have to scan the use list because PHI nodes use basic blocks too but
2430 // do not require a label to be generated.
2432 bool NeedsLabel = false;
2433 for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI != E; ++PI)
2434 if (isGotoCodeNecessary(*PI, BB)) {
2439 if (NeedsLabel) Out << GetValueName(BB) << ":\n";
2441 // Output all of the instructions in the basic block...
2442 for (BasicBlock::iterator II = BB->begin(), E = --BB->end(); II != E;
2444 if (!isInlinableInst(*II) && !isDirectAlloca(II)) {
2445 if (II->getType() != Type::VoidTy && !isInlineAsm(*II))
2449 writeInstComputationInline(*II);
2454 // Don't emit prefix or suffix for the terminator.
2455 visit(*BB->getTerminator());
2459 // Specific Instruction type classes... note that all of the casts are
2460 // necessary because we use the instruction classes as opaque types...
2462 void CWriter::visitReturnInst(ReturnInst &I) {
2463 // If this is a struct return function, return the temporary struct.
2464 bool isStructReturn = I.getParent()->getParent()->hasStructRetAttr();
2466 if (isStructReturn) {
2467 Out << " return StructReturn;\n";
2471 // Don't output a void return if this is the last basic block in the function
2472 if (I.getNumOperands() == 0 &&
2473 &*--I.getParent()->getParent()->end() == I.getParent() &&
2474 !I.getParent()->size() == 1) {
2478 if (I.getNumOperands() > 1) {
2481 printType(Out, I.getParent()->getParent()->getReturnType());
2482 Out << " llvm_cbe_mrv_temp = {\n";
2483 for (unsigned i = 0, e = I.getNumOperands(); i != e; ++i) {
2485 writeOperand(I.getOperand(i));
2491 Out << " return llvm_cbe_mrv_temp;\n";
2497 if (I.getNumOperands()) {
2499 writeOperand(I.getOperand(0));
2504 void CWriter::visitSwitchInst(SwitchInst &SI) {
2507 writeOperand(SI.getOperand(0));
2508 Out << ") {\n default:\n";
2509 printPHICopiesForSuccessor (SI.getParent(), SI.getDefaultDest(), 2);
2510 printBranchToBlock(SI.getParent(), SI.getDefaultDest(), 2);
2512 for (unsigned i = 2, e = SI.getNumOperands(); i != e; i += 2) {
2514 writeOperand(SI.getOperand(i));
2516 BasicBlock *Succ = cast<BasicBlock>(SI.getOperand(i+1));
2517 printPHICopiesForSuccessor (SI.getParent(), Succ, 2);
2518 printBranchToBlock(SI.getParent(), Succ, 2);
2519 if (Function::iterator(Succ) == next(Function::iterator(SI.getParent())))
2525 void CWriter::visitUnreachableInst(UnreachableInst &I) {
2526 Out << " /*UNREACHABLE*/;\n";
2529 bool CWriter::isGotoCodeNecessary(BasicBlock *From, BasicBlock *To) {
2530 /// FIXME: This should be reenabled, but loop reordering safe!!
2533 if (next(Function::iterator(From)) != Function::iterator(To))
2534 return true; // Not the direct successor, we need a goto.
2536 //isa<SwitchInst>(From->getTerminator())
2538 if (LI->getLoopFor(From) != LI->getLoopFor(To))
2543 void CWriter::printPHICopiesForSuccessor (BasicBlock *CurBlock,
2544 BasicBlock *Successor,
2546 for (BasicBlock::iterator I = Successor->begin(); isa<PHINode>(I); ++I) {
2547 PHINode *PN = cast<PHINode>(I);
2548 // Now we have to do the printing.
2549 Value *IV = PN->getIncomingValueForBlock(CurBlock);
2550 if (!isa<UndefValue>(IV)) {
2551 Out << std::string(Indent, ' ');
2552 Out << " " << GetValueName(I) << "__PHI_TEMPORARY = ";
2554 Out << "; /* for PHI node */\n";
2559 void CWriter::printBranchToBlock(BasicBlock *CurBB, BasicBlock *Succ,
2561 if (isGotoCodeNecessary(CurBB, Succ)) {
2562 Out << std::string(Indent, ' ') << " goto ";
2568 // Branch instruction printing - Avoid printing out a branch to a basic block
2569 // that immediately succeeds the current one.
2571 void CWriter::visitBranchInst(BranchInst &I) {
2573 if (I.isConditional()) {
2574 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(0))) {
2576 writeOperand(I.getCondition());
2579 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 2);
2580 printBranchToBlock(I.getParent(), I.getSuccessor(0), 2);
2582 if (isGotoCodeNecessary(I.getParent(), I.getSuccessor(1))) {
2583 Out << " } else {\n";
2584 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2585 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2588 // First goto not necessary, assume second one is...
2590 writeOperand(I.getCondition());
2593 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(1), 2);
2594 printBranchToBlock(I.getParent(), I.getSuccessor(1), 2);
2599 printPHICopiesForSuccessor (I.getParent(), I.getSuccessor(0), 0);
2600 printBranchToBlock(I.getParent(), I.getSuccessor(0), 0);
2605 // PHI nodes get copied into temporary values at the end of predecessor basic
2606 // blocks. We now need to copy these temporary values into the REAL value for
2608 void CWriter::visitPHINode(PHINode &I) {
2610 Out << "__PHI_TEMPORARY";
2614 void CWriter::visitBinaryOperator(Instruction &I) {
2615 // binary instructions, shift instructions, setCond instructions.
2616 assert(!isa<PointerType>(I.getType()));
2618 // We must cast the results of binary operations which might be promoted.
2619 bool needsCast = false;
2620 if ((I.getType() == Type::Int8Ty) || (I.getType() == Type::Int16Ty)
2621 || (I.getType() == Type::FloatTy)) {
2624 printType(Out, I.getType(), false);
2628 // If this is a negation operation, print it out as such. For FP, we don't
2629 // want to print "-0.0 - X".
2630 if (BinaryOperator::isNeg(&I)) {
2632 writeOperand(BinaryOperator::getNegArgument(cast<BinaryOperator>(&I)));
2634 } else if (BinaryOperator::isFNeg(&I)) {
2636 writeOperand(BinaryOperator::getFNegArgument(cast<BinaryOperator>(&I)));
2638 } else if (I.getOpcode() == Instruction::FRem) {
2639 // Output a call to fmod/fmodf instead of emitting a%b
2640 if (I.getType() == Type::FloatTy)
2642 else if (I.getType() == Type::DoubleTy)
2644 else // all 3 flavors of long double
2646 writeOperand(I.getOperand(0));
2648 writeOperand(I.getOperand(1));
2652 // Write out the cast of the instruction's value back to the proper type
2654 bool NeedsClosingParens = writeInstructionCast(I);
2656 // Certain instructions require the operand to be forced to a specific type
2657 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2658 // below for operand 1
2659 writeOperandWithCast(I.getOperand(0), I.getOpcode());
2661 switch (I.getOpcode()) {
2662 case Instruction::Add:
2663 case Instruction::FAdd: Out << " + "; break;
2664 case Instruction::Sub:
2665 case Instruction::FSub: Out << " - "; break;
2666 case Instruction::Mul:
2667 case Instruction::FMul: Out << " * "; break;
2668 case Instruction::URem:
2669 case Instruction::SRem:
2670 case Instruction::FRem: Out << " % "; break;
2671 case Instruction::UDiv:
2672 case Instruction::SDiv:
2673 case Instruction::FDiv: Out << " / "; break;
2674 case Instruction::And: Out << " & "; break;
2675 case Instruction::Or: Out << " | "; break;
2676 case Instruction::Xor: Out << " ^ "; break;
2677 case Instruction::Shl : Out << " << "; break;
2678 case Instruction::LShr:
2679 case Instruction::AShr: Out << " >> "; break;
2682 cerr << "Invalid operator type!" << I;
2684 llvm_unreachable(0);
2687 writeOperandWithCast(I.getOperand(1), I.getOpcode());
2688 if (NeedsClosingParens)
2697 void CWriter::visitICmpInst(ICmpInst &I) {
2698 // We must cast the results of icmp which might be promoted.
2699 bool needsCast = false;
2701 // Write out the cast of the instruction's value back to the proper type
2703 bool NeedsClosingParens = writeInstructionCast(I);
2705 // Certain icmp predicate require the operand to be forced to a specific type
2706 // so we use writeOperandWithCast here instead of writeOperand. Similarly
2707 // below for operand 1
2708 writeOperandWithCast(I.getOperand(0), I);
2710 switch (I.getPredicate()) {
2711 case ICmpInst::ICMP_EQ: Out << " == "; break;
2712 case ICmpInst::ICMP_NE: Out << " != "; break;
2713 case ICmpInst::ICMP_ULE:
2714 case ICmpInst::ICMP_SLE: Out << " <= "; break;
2715 case ICmpInst::ICMP_UGE:
2716 case ICmpInst::ICMP_SGE: Out << " >= "; break;
2717 case ICmpInst::ICMP_ULT:
2718 case ICmpInst::ICMP_SLT: Out << " < "; break;
2719 case ICmpInst::ICMP_UGT:
2720 case ICmpInst::ICMP_SGT: Out << " > "; break;
2723 cerr << "Invalid icmp predicate!" << I;
2725 llvm_unreachable(0);
2728 writeOperandWithCast(I.getOperand(1), I);
2729 if (NeedsClosingParens)
2737 void CWriter::visitFCmpInst(FCmpInst &I) {
2738 if (I.getPredicate() == FCmpInst::FCMP_FALSE) {
2742 if (I.getPredicate() == FCmpInst::FCMP_TRUE) {
2748 switch (I.getPredicate()) {
2749 default: llvm_unreachable("Illegal FCmp predicate");
2750 case FCmpInst::FCMP_ORD: op = "ord"; break;
2751 case FCmpInst::FCMP_UNO: op = "uno"; break;
2752 case FCmpInst::FCMP_UEQ: op = "ueq"; break;
2753 case FCmpInst::FCMP_UNE: op = "une"; break;
2754 case FCmpInst::FCMP_ULT: op = "ult"; break;
2755 case FCmpInst::FCMP_ULE: op = "ule"; break;
2756 case FCmpInst::FCMP_UGT: op = "ugt"; break;
2757 case FCmpInst::FCMP_UGE: op = "uge"; break;
2758 case FCmpInst::FCMP_OEQ: op = "oeq"; break;
2759 case FCmpInst::FCMP_ONE: op = "one"; break;
2760 case FCmpInst::FCMP_OLT: op = "olt"; break;
2761 case FCmpInst::FCMP_OLE: op = "ole"; break;
2762 case FCmpInst::FCMP_OGT: op = "ogt"; break;
2763 case FCmpInst::FCMP_OGE: op = "oge"; break;
2766 Out << "llvm_fcmp_" << op << "(";
2767 // Write the first operand
2768 writeOperand(I.getOperand(0));
2770 // Write the second operand
2771 writeOperand(I.getOperand(1));
2775 static const char * getFloatBitCastField(const Type *Ty) {
2776 switch (Ty->getTypeID()) {
2777 default: llvm_unreachable("Invalid Type");
2778 case Type::FloatTyID: return "Float";
2779 case Type::DoubleTyID: return "Double";
2780 case Type::IntegerTyID: {
2781 unsigned NumBits = cast<IntegerType>(Ty)->getBitWidth();
2790 void CWriter::visitCastInst(CastInst &I) {
2791 const Type *DstTy = I.getType();
2792 const Type *SrcTy = I.getOperand(0)->getType();
2793 if (isFPIntBitCast(I)) {
2795 // These int<->float and long<->double casts need to be handled specially
2796 Out << GetValueName(&I) << "__BITCAST_TEMPORARY."
2797 << getFloatBitCastField(I.getOperand(0)->getType()) << " = ";
2798 writeOperand(I.getOperand(0));
2799 Out << ", " << GetValueName(&I) << "__BITCAST_TEMPORARY."
2800 << getFloatBitCastField(I.getType());
2806 printCast(I.getOpcode(), SrcTy, DstTy);
2808 // Make a sext from i1 work by subtracting the i1 from 0 (an int).
2809 if (SrcTy == Type::Int1Ty && I.getOpcode() == Instruction::SExt)
2812 writeOperand(I.getOperand(0));
2814 if (DstTy == Type::Int1Ty &&
2815 (I.getOpcode() == Instruction::Trunc ||
2816 I.getOpcode() == Instruction::FPToUI ||
2817 I.getOpcode() == Instruction::FPToSI ||
2818 I.getOpcode() == Instruction::PtrToInt)) {
2819 // Make sure we really get a trunc to bool by anding the operand with 1
2825 void CWriter::visitSelectInst(SelectInst &I) {
2827 writeOperand(I.getCondition());
2829 writeOperand(I.getTrueValue());
2831 writeOperand(I.getFalseValue());
2836 void CWriter::lowerIntrinsics(Function &F) {
2837 // This is used to keep track of intrinsics that get generated to a lowered
2838 // function. We must generate the prototypes before the function body which
2839 // will only be expanded on first use (by the loop below).
2840 std::vector<Function*> prototypesToGen;
2842 // Examine all the instructions in this function to find the intrinsics that
2843 // need to be lowered.
2844 for (Function::iterator BB = F.begin(), EE = F.end(); BB != EE; ++BB)
2845 for (BasicBlock::iterator I = BB->begin(), E = BB->end(); I != E; )
2846 if (CallInst *CI = dyn_cast<CallInst>(I++))
2847 if (Function *F = CI->getCalledFunction())
2848 switch (F->getIntrinsicID()) {
2849 case Intrinsic::not_intrinsic:
2850 case Intrinsic::memory_barrier:
2851 case Intrinsic::vastart:
2852 case Intrinsic::vacopy:
2853 case Intrinsic::vaend:
2854 case Intrinsic::returnaddress:
2855 case Intrinsic::frameaddress:
2856 case Intrinsic::setjmp:
2857 case Intrinsic::longjmp:
2858 case Intrinsic::prefetch:
2859 case Intrinsic::dbg_stoppoint:
2860 case Intrinsic::powi:
2861 case Intrinsic::x86_sse_cmp_ss:
2862 case Intrinsic::x86_sse_cmp_ps:
2863 case Intrinsic::x86_sse2_cmp_sd:
2864 case Intrinsic::x86_sse2_cmp_pd:
2865 case Intrinsic::ppc_altivec_lvsl:
2866 // We directly implement these intrinsics
2869 // If this is an intrinsic that directly corresponds to a GCC
2870 // builtin, we handle it.
2871 const char *BuiltinName = "";
2872 #define GET_GCC_BUILTIN_NAME
2873 #include "llvm/Intrinsics.gen"
2874 #undef GET_GCC_BUILTIN_NAME
2875 // If we handle it, don't lower it.
2876 if (BuiltinName[0]) break;
2878 // All other intrinsic calls we must lower.
2879 Instruction *Before = 0;
2880 if (CI != &BB->front())
2881 Before = prior(BasicBlock::iterator(CI));
2883 IL->LowerIntrinsicCall(CI);
2884 if (Before) { // Move iterator to instruction after call
2889 // If the intrinsic got lowered to another call, and that call has
2890 // a definition then we need to make sure its prototype is emitted
2891 // before any calls to it.
2892 if (CallInst *Call = dyn_cast<CallInst>(I))
2893 if (Function *NewF = Call->getCalledFunction())
2894 if (!NewF->isDeclaration())
2895 prototypesToGen.push_back(NewF);
2900 // We may have collected some prototypes to emit in the loop above.
2901 // Emit them now, before the function that uses them is emitted. But,
2902 // be careful not to emit them twice.
2903 std::vector<Function*>::iterator I = prototypesToGen.begin();
2904 std::vector<Function*>::iterator E = prototypesToGen.end();
2905 for ( ; I != E; ++I) {
2906 if (intrinsicPrototypesAlreadyGenerated.insert(*I).second) {
2908 printFunctionSignature(*I, true);
2914 void CWriter::visitCallInst(CallInst &I) {
2915 if (isa<InlineAsm>(I.getOperand(0)))
2916 return visitInlineAsm(I);
2918 bool WroteCallee = false;
2920 // Handle intrinsic function calls first...
2921 if (Function *F = I.getCalledFunction())
2922 if (Intrinsic::ID ID = (Intrinsic::ID)F->getIntrinsicID())
2923 if (visitBuiltinCall(I, ID, WroteCallee))
2926 Value *Callee = I.getCalledValue();
2928 const PointerType *PTy = cast<PointerType>(Callee->getType());
2929 const FunctionType *FTy = cast<FunctionType>(PTy->getElementType());
2931 // If this is a call to a struct-return function, assign to the first
2932 // parameter instead of passing it to the call.
2933 const AttrListPtr &PAL = I.getAttributes();
2934 bool hasByVal = I.hasByValArgument();
2935 bool isStructRet = I.hasStructRetAttr();
2937 writeOperandDeref(I.getOperand(1));
2941 if (I.isTailCall()) Out << " /*tail*/ ";
2944 // If this is an indirect call to a struct return function, we need to cast
2945 // the pointer. Ditto for indirect calls with byval arguments.
2946 bool NeedsCast = (hasByVal || isStructRet) && !isa<Function>(Callee);
2948 // GCC is a real PITA. It does not permit codegening casts of functions to
2949 // function pointers if they are in a call (it generates a trap instruction
2950 // instead!). We work around this by inserting a cast to void* in between
2951 // the function and the function pointer cast. Unfortunately, we can't just
2952 // form the constant expression here, because the folder will immediately
2955 // Note finally, that this is completely unsafe. ANSI C does not guarantee
2956 // that void* and function pointers have the same size. :( To deal with this
2957 // in the common case, we handle casts where the number of arguments passed
2960 if (ConstantExpr *CE = dyn_cast<ConstantExpr>(Callee))
2962 if (Function *RF = dyn_cast<Function>(CE->getOperand(0))) {
2968 // Ok, just cast the pointer type.
2971 printStructReturnPointerFunctionType(Out, PAL,
2972 cast<PointerType>(I.getCalledValue()->getType()));
2974 printType(Out, I.getCalledValue()->getType(), false, "", true, PAL);
2976 printType(Out, I.getCalledValue()->getType());
2979 writeOperand(Callee);
2980 if (NeedsCast) Out << ')';
2985 unsigned NumDeclaredParams = FTy->getNumParams();
2987 CallSite::arg_iterator AI = I.op_begin()+1, AE = I.op_end();
2989 if (isStructRet) { // Skip struct return argument.
2994 bool PrintedArg = false;
2995 for (; AI != AE; ++AI, ++ArgNo) {
2996 if (PrintedArg) Out << ", ";
2997 if (ArgNo < NumDeclaredParams &&
2998 (*AI)->getType() != FTy->getParamType(ArgNo)) {
3000 printType(Out, FTy->getParamType(ArgNo),
3001 /*isSigned=*/PAL.paramHasAttr(ArgNo+1, Attribute::SExt));
3004 // Check if the argument is expected to be passed by value.
3005 if (I.paramHasAttr(ArgNo+1, Attribute::ByVal))
3006 writeOperandDeref(*AI);
3014 /// visitBuiltinCall - Handle the call to the specified builtin. Returns true
3015 /// if the entire call is handled, return false it it wasn't handled, and
3016 /// optionally set 'WroteCallee' if the callee has already been printed out.
3017 bool CWriter::visitBuiltinCall(CallInst &I, Intrinsic::ID ID,
3018 bool &WroteCallee) {
3021 // If this is an intrinsic that directly corresponds to a GCC
3022 // builtin, we emit it here.
3023 const char *BuiltinName = "";
3024 Function *F = I.getCalledFunction();
3025 #define GET_GCC_BUILTIN_NAME
3026 #include "llvm/Intrinsics.gen"
3027 #undef GET_GCC_BUILTIN_NAME
3028 assert(BuiltinName[0] && "Unknown LLVM intrinsic!");
3034 case Intrinsic::memory_barrier:
3035 Out << "__sync_synchronize()";
3037 case Intrinsic::vastart:
3040 Out << "va_start(*(va_list*)";
3041 writeOperand(I.getOperand(1));
3043 // Output the last argument to the enclosing function.
3044 if (I.getParent()->getParent()->arg_empty()) {
3046 raw_string_ostream Msg(msg);
3047 Msg << "The C backend does not currently support zero "
3048 << "argument varargs functions, such as '"
3049 << I.getParent()->getParent()->getName() << "'!";
3050 llvm_report_error(Msg.str());
3052 writeOperand(--I.getParent()->getParent()->arg_end());
3055 case Intrinsic::vaend:
3056 if (!isa<ConstantPointerNull>(I.getOperand(1))) {
3057 Out << "0; va_end(*(va_list*)";
3058 writeOperand(I.getOperand(1));
3061 Out << "va_end(*(va_list*)0)";
3064 case Intrinsic::vacopy:
3066 Out << "va_copy(*(va_list*)";
3067 writeOperand(I.getOperand(1));
3068 Out << ", *(va_list*)";
3069 writeOperand(I.getOperand(2));
3072 case Intrinsic::returnaddress:
3073 Out << "__builtin_return_address(";
3074 writeOperand(I.getOperand(1));
3077 case Intrinsic::frameaddress:
3078 Out << "__builtin_frame_address(";
3079 writeOperand(I.getOperand(1));
3082 case Intrinsic::powi:
3083 Out << "__builtin_powi(";
3084 writeOperand(I.getOperand(1));
3086 writeOperand(I.getOperand(2));
3089 case Intrinsic::setjmp:
3090 Out << "setjmp(*(jmp_buf*)";
3091 writeOperand(I.getOperand(1));
3094 case Intrinsic::longjmp:
3095 Out << "longjmp(*(jmp_buf*)";
3096 writeOperand(I.getOperand(1));
3098 writeOperand(I.getOperand(2));
3101 case Intrinsic::prefetch:
3102 Out << "LLVM_PREFETCH((const void *)";
3103 writeOperand(I.getOperand(1));
3105 writeOperand(I.getOperand(2));
3107 writeOperand(I.getOperand(3));
3110 case Intrinsic::stacksave:
3111 // Emit this as: Val = 0; *((void**)&Val) = __builtin_stack_save()
3112 // to work around GCC bugs (see PR1809).
3113 Out << "0; *((void**)&" << GetValueName(&I)
3114 << ") = __builtin_stack_save()";
3116 case Intrinsic::dbg_stoppoint: {
3117 // If we use writeOperand directly we get a "u" suffix which is rejected
3119 std::stringstream SPIStr;
3120 DbgStopPointInst &SPI = cast<DbgStopPointInst>(I);
3121 SPI.getDirectory()->print(SPIStr);
3125 Out << SPIStr.str();
3127 SPI.getFileName()->print(SPIStr);
3128 Out << SPIStr.str() << "\"\n";
3131 case Intrinsic::x86_sse_cmp_ss:
3132 case Intrinsic::x86_sse_cmp_ps:
3133 case Intrinsic::x86_sse2_cmp_sd:
3134 case Intrinsic::x86_sse2_cmp_pd:
3136 printType(Out, I.getType());
3138 // Multiple GCC builtins multiplex onto this intrinsic.
3139 switch (cast<ConstantInt>(I.getOperand(3))->getZExtValue()) {
3140 default: llvm_unreachable("Invalid llvm.x86.sse.cmp!");
3141 case 0: Out << "__builtin_ia32_cmpeq"; break;
3142 case 1: Out << "__builtin_ia32_cmplt"; break;
3143 case 2: Out << "__builtin_ia32_cmple"; break;
3144 case 3: Out << "__builtin_ia32_cmpunord"; break;
3145 case 4: Out << "__builtin_ia32_cmpneq"; break;
3146 case 5: Out << "__builtin_ia32_cmpnlt"; break;
3147 case 6: Out << "__builtin_ia32_cmpnle"; break;
3148 case 7: Out << "__builtin_ia32_cmpord"; break;
3150 if (ID == Intrinsic::x86_sse_cmp_ps || ID == Intrinsic::x86_sse2_cmp_pd)
3154 if (ID == Intrinsic::x86_sse_cmp_ss || ID == Intrinsic::x86_sse_cmp_ps)
3160 writeOperand(I.getOperand(1));
3162 writeOperand(I.getOperand(2));
3165 case Intrinsic::ppc_altivec_lvsl:
3167 printType(Out, I.getType());
3169 Out << "__builtin_altivec_lvsl(0, (void*)";
3170 writeOperand(I.getOperand(1));
3176 //This converts the llvm constraint string to something gcc is expecting.
3177 //TODO: work out platform independent constraints and factor those out
3178 // of the per target tables
3179 // handle multiple constraint codes
3180 std::string CWriter::InterpretASMConstraint(InlineAsm::ConstraintInfo& c) {
3182 assert(c.Codes.size() == 1 && "Too many asm constraint codes to handle");
3184 const char *const *table = 0;
3186 // Grab the translation table from TargetAsmInfo if it exists.
3189 const Target *Match =
3190 TargetRegistry::getClosestStaticTargetForModule(*TheModule, E);
3192 // Per platform Target Machines don't exist, so create it;
3193 // this must be done only once.
3194 const TargetMachine* TM = Match->createTargetMachine(*TheModule, "");
3195 TAsm = TM->getTargetAsmInfo();
3199 table = TAsm->getAsmCBE();
3201 // Search the translation table if it exists.
3202 for (int i = 0; table && table[i]; i += 2)
3203 if (c.Codes[0] == table[i])
3206 // Default is identity.
3210 //TODO: import logic from AsmPrinter.cpp
3211 static std::string gccifyAsm(std::string asmstr) {
3212 for (std::string::size_type i = 0; i != asmstr.size(); ++i)
3213 if (asmstr[i] == '\n')
3214 asmstr.replace(i, 1, "\\n");
3215 else if (asmstr[i] == '\t')
3216 asmstr.replace(i, 1, "\\t");
3217 else if (asmstr[i] == '$') {
3218 if (asmstr[i + 1] == '{') {
3219 std::string::size_type a = asmstr.find_first_of(':', i + 1);
3220 std::string::size_type b = asmstr.find_first_of('}', i + 1);
3221 std::string n = "%" +
3222 asmstr.substr(a + 1, b - a - 1) +
3223 asmstr.substr(i + 2, a - i - 2);
3224 asmstr.replace(i, b - i + 1, n);
3227 asmstr.replace(i, 1, "%");
3229 else if (asmstr[i] == '%')//grr
3230 { asmstr.replace(i, 1, "%%"); ++i;}
3235 //TODO: assumptions about what consume arguments from the call are likely wrong
3236 // handle communitivity
3237 void CWriter::visitInlineAsm(CallInst &CI) {
3238 InlineAsm* as = cast<InlineAsm>(CI.getOperand(0));
3239 std::vector<InlineAsm::ConstraintInfo> Constraints = as->ParseConstraints();
3241 std::vector<std::pair<Value*, int> > ResultVals;
3242 if (CI.getType() == Type::VoidTy)
3244 else if (const StructType *ST = dyn_cast<StructType>(CI.getType())) {
3245 for (unsigned i = 0, e = ST->getNumElements(); i != e; ++i)
3246 ResultVals.push_back(std::make_pair(&CI, (int)i));
3248 ResultVals.push_back(std::make_pair(&CI, -1));
3251 // Fix up the asm string for gcc and emit it.
3252 Out << "__asm__ volatile (\"" << gccifyAsm(as->getAsmString()) << "\"\n";
3255 unsigned ValueCount = 0;
3256 bool IsFirst = true;
3258 // Convert over all the output constraints.
3259 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3260 E = Constraints.end(); I != E; ++I) {
3262 if (I->Type != InlineAsm::isOutput) {
3264 continue; // Ignore non-output constraints.
3267 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3268 std::string C = InterpretASMConstraint(*I);
3269 if (C.empty()) continue;
3280 if (ValueCount < ResultVals.size()) {
3281 DestVal = ResultVals[ValueCount].first;
3282 DestValNo = ResultVals[ValueCount].second;
3284 DestVal = CI.getOperand(ValueCount-ResultVals.size()+1);
3286 if (I->isEarlyClobber)
3289 Out << "\"=" << C << "\"(" << GetValueName(DestVal);
3290 if (DestValNo != -1)
3291 Out << ".field" << DestValNo; // Multiple retvals.
3297 // Convert over all the input constraints.
3301 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3302 E = Constraints.end(); I != E; ++I) {
3303 if (I->Type != InlineAsm::isInput) {
3305 continue; // Ignore non-input constraints.
3308 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3309 std::string C = InterpretASMConstraint(*I);
3310 if (C.empty()) continue;
3317 assert(ValueCount >= ResultVals.size() && "Input can't refer to result");
3318 Value *SrcVal = CI.getOperand(ValueCount-ResultVals.size()+1);
3320 Out << "\"" << C << "\"(";
3322 writeOperand(SrcVal);
3324 writeOperandDeref(SrcVal);
3328 // Convert over the clobber constraints.
3331 for (std::vector<InlineAsm::ConstraintInfo>::iterator I = Constraints.begin(),
3332 E = Constraints.end(); I != E; ++I) {
3333 if (I->Type != InlineAsm::isClobber)
3334 continue; // Ignore non-input constraints.
3336 assert(I->Codes.size() == 1 && "Too many asm constraint codes to handle");
3337 std::string C = InterpretASMConstraint(*I);
3338 if (C.empty()) continue;
3345 Out << '\"' << C << '"';
3351 void CWriter::visitMallocInst(MallocInst &I) {
3352 llvm_unreachable("lowerallocations pass didn't work!");
3355 void CWriter::visitAllocaInst(AllocaInst &I) {
3357 printType(Out, I.getType());
3358 Out << ") alloca(sizeof(";
3359 printType(Out, I.getType()->getElementType());
3361 if (I.isArrayAllocation()) {
3363 writeOperand(I.getOperand(0));
3368 void CWriter::visitFreeInst(FreeInst &I) {
3369 llvm_unreachable("lowerallocations pass didn't work!");
3372 void CWriter::printGEPExpression(Value *Ptr, gep_type_iterator I,
3373 gep_type_iterator E, bool Static) {
3375 // If there are no indices, just print out the pointer.
3381 // Find out if the last index is into a vector. If so, we have to print this
3382 // specially. Since vectors can't have elements of indexable type, only the
3383 // last index could possibly be of a vector element.
3384 const VectorType *LastIndexIsVector = 0;
3386 for (gep_type_iterator TmpI = I; TmpI != E; ++TmpI)
3387 LastIndexIsVector = dyn_cast<VectorType>(*TmpI);
3392 // If the last index is into a vector, we can't print it as &a[i][j] because
3393 // we can't index into a vector with j in GCC. Instead, emit this as
3394 // (((float*)&a[i])+j)
3395 if (LastIndexIsVector) {
3397 printType(Out, PointerType::getUnqual(LastIndexIsVector->getElementType()));
3403 // If the first index is 0 (very typical) we can do a number of
3404 // simplifications to clean up the code.
3405 Value *FirstOp = I.getOperand();
3406 if (!isa<Constant>(FirstOp) || !cast<Constant>(FirstOp)->isNullValue()) {
3407 // First index isn't simple, print it the hard way.
3410 ++I; // Skip the zero index.
3412 // Okay, emit the first operand. If Ptr is something that is already address
3413 // exposed, like a global, avoid emitting (&foo)[0], just emit foo instead.
3414 if (isAddressExposed(Ptr)) {
3415 writeOperandInternal(Ptr, Static);
3416 } else if (I != E && isa<StructType>(*I)) {
3417 // If we didn't already emit the first operand, see if we can print it as
3418 // P->f instead of "P[0].f"
3420 Out << "->field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3421 ++I; // eat the struct index as well.
3423 // Instead of emitting P[0][1], emit (*P)[1], which is more idiomatic.
3430 for (; I != E; ++I) {
3431 if (isa<StructType>(*I)) {
3432 Out << ".field" << cast<ConstantInt>(I.getOperand())->getZExtValue();
3433 } else if (isa<ArrayType>(*I)) {
3435 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3437 } else if (!isa<VectorType>(*I)) {
3439 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3442 // If the last index is into a vector, then print it out as "+j)". This
3443 // works with the 'LastIndexIsVector' code above.
3444 if (isa<Constant>(I.getOperand()) &&
3445 cast<Constant>(I.getOperand())->isNullValue()) {
3446 Out << "))"; // avoid "+0".
3449 writeOperandWithCast(I.getOperand(), Instruction::GetElementPtr);
3457 void CWriter::writeMemoryAccess(Value *Operand, const Type *OperandType,
3458 bool IsVolatile, unsigned Alignment) {
3460 bool IsUnaligned = Alignment &&
3461 Alignment < TD->getABITypeAlignment(OperandType);
3465 if (IsVolatile || IsUnaligned) {
3468 Out << "struct __attribute__ ((packed, aligned(" << Alignment << "))) {";
3469 printType(Out, OperandType, false, IsUnaligned ? "data" : "volatile*");
3472 if (IsVolatile) Out << "volatile ";
3478 writeOperand(Operand);
3480 if (IsVolatile || IsUnaligned) {
3487 void CWriter::visitLoadInst(LoadInst &I) {
3488 writeMemoryAccess(I.getOperand(0), I.getType(), I.isVolatile(),
3493 void CWriter::visitStoreInst(StoreInst &I) {
3494 writeMemoryAccess(I.getPointerOperand(), I.getOperand(0)->getType(),
3495 I.isVolatile(), I.getAlignment());
3497 Value *Operand = I.getOperand(0);
3498 Constant *BitMask = 0;
3499 if (const IntegerType* ITy = dyn_cast<IntegerType>(Operand->getType()))
3500 if (!ITy->isPowerOf2ByteWidth())
3501 // We have a bit width that doesn't match an even power-of-2 byte
3502 // size. Consequently we must & the value with the type's bit mask
3503 BitMask = I.getContext().getConstantInt(ITy, ITy->getBitMask());
3506 writeOperand(Operand);
3509 printConstant(BitMask, false);
3514 void CWriter::visitGetElementPtrInst(GetElementPtrInst &I) {
3515 printGEPExpression(I.getPointerOperand(), gep_type_begin(I),
3516 gep_type_end(I), false);
3519 void CWriter::visitVAArgInst(VAArgInst &I) {
3520 Out << "va_arg(*(va_list*)";
3521 writeOperand(I.getOperand(0));
3523 printType(Out, I.getType());
3527 void CWriter::visitInsertElementInst(InsertElementInst &I) {
3528 const Type *EltTy = I.getType()->getElementType();
3529 writeOperand(I.getOperand(0));
3532 printType(Out, PointerType::getUnqual(EltTy));
3533 Out << ")(&" << GetValueName(&I) << "))[";
3534 writeOperand(I.getOperand(2));
3536 writeOperand(I.getOperand(1));
3540 void CWriter::visitExtractElementInst(ExtractElementInst &I) {
3541 // We know that our operand is not inlined.
3544 cast<VectorType>(I.getOperand(0)->getType())->getElementType();
3545 printType(Out, PointerType::getUnqual(EltTy));
3546 Out << ")(&" << GetValueName(I.getOperand(0)) << "))[";
3547 writeOperand(I.getOperand(1));
3551 void CWriter::visitShuffleVectorInst(ShuffleVectorInst &SVI) {
3553 printType(Out, SVI.getType());
3555 const VectorType *VT = SVI.getType();
3556 unsigned NumElts = VT->getNumElements();
3557 const Type *EltTy = VT->getElementType();
3559 for (unsigned i = 0; i != NumElts; ++i) {
3561 int SrcVal = SVI.getMaskValue(i);
3562 if ((unsigned)SrcVal >= NumElts*2) {
3563 Out << " 0/*undef*/ ";
3565 Value *Op = SVI.getOperand((unsigned)SrcVal >= NumElts);
3566 if (isa<Instruction>(Op)) {
3567 // Do an extractelement of this value from the appropriate input.
3569 printType(Out, PointerType::getUnqual(EltTy));
3570 Out << ")(&" << GetValueName(Op)
3571 << "))[" << (SrcVal & (NumElts-1)) << "]";
3572 } else if (isa<ConstantAggregateZero>(Op) || isa<UndefValue>(Op)) {
3575 printConstant(cast<ConstantVector>(Op)->getOperand(SrcVal &
3584 void CWriter::visitInsertValueInst(InsertValueInst &IVI) {
3585 // Start by copying the entire aggregate value into the result variable.
3586 writeOperand(IVI.getOperand(0));
3589 // Then do the insert to update the field.
3590 Out << GetValueName(&IVI);
3591 for (const unsigned *b = IVI.idx_begin(), *i = b, *e = IVI.idx_end();
3593 const Type *IndexedTy =
3594 ExtractValueInst::getIndexedType(IVI.getOperand(0)->getType(), b, i+1);
3595 if (isa<ArrayType>(IndexedTy))
3596 Out << ".array[" << *i << "]";
3598 Out << ".field" << *i;
3601 writeOperand(IVI.getOperand(1));
3604 void CWriter::visitExtractValueInst(ExtractValueInst &EVI) {
3606 if (isa<UndefValue>(EVI.getOperand(0))) {
3608 printType(Out, EVI.getType());
3609 Out << ") 0/*UNDEF*/";
3611 Out << GetValueName(EVI.getOperand(0));
3612 for (const unsigned *b = EVI.idx_begin(), *i = b, *e = EVI.idx_end();
3614 const Type *IndexedTy =
3615 ExtractValueInst::getIndexedType(EVI.getOperand(0)->getType(), b, i+1);
3616 if (isa<ArrayType>(IndexedTy))
3617 Out << ".array[" << *i << "]";
3619 Out << ".field" << *i;
3625 //===----------------------------------------------------------------------===//
3626 // External Interface declaration
3627 //===----------------------------------------------------------------------===//
3629 bool CTargetMachine::addPassesToEmitWholeFile(PassManager &PM,
3630 formatted_raw_ostream &o,
3631 CodeGenFileType FileType,
3632 CodeGenOpt::Level OptLevel) {
3633 if (FileType != TargetMachine::AssemblyFile) return true;
3635 PM.add(createGCLoweringPass());
3636 PM.add(createLowerAllocationsPass(true));
3637 PM.add(createLowerInvokePass());
3638 PM.add(createCFGSimplificationPass()); // clean up after lower invoke.
3639 PM.add(new CBackendNameAllUsedStructsAndMergeFunctions());
3640 PM.add(new CWriter(o));
3641 PM.add(createGCInfoDeleter());