X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FAnalysis%2FMemoryBuiltins.cpp;h=64d339f564d75766862761a50941e5a1099c8d2b;hb=12af22e8cc217827cf4f118b0f5e4ebbda9925ae;hp=37e2e271ceeaaaaa229a9be1128f3b298b662a1f;hpb=1e80bef8962d84375bdcb3d9d1d43a4631870499;p=oota-llvm.git diff --git a/lib/Analysis/MemoryBuiltins.cpp b/lib/Analysis/MemoryBuiltins.cpp index 37e2e271cee..64d339f564d 100644 --- a/lib/Analysis/MemoryBuiltins.cpp +++ b/lib/Analysis/MemoryBuiltins.cpp @@ -12,7 +12,6 @@ // //===----------------------------------------------------------------------===// -#define DEBUG_TYPE "memory-builtins" #include "llvm/Analysis/MemoryBuiltins.h" #include "llvm/ADT/STLExtras.h" #include "llvm/ADT/Statistic.h" @@ -30,6 +29,8 @@ #include "llvm/Transforms/Utils/Local.h" using namespace llvm; +#define DEBUG_TYPE "memory-builtins" + enum AllocType { OpNewLike = 1<<0, // allocates; never returns null MallocLike = 1<<1 | OpNewLike, // allocates; may return null @@ -76,14 +77,14 @@ static Function *getCalledFunction(const Value *V, bool LookThroughBitCast) { CallSite CS(const_cast(V)); if (!CS.getInstruction()) - return 0; + return nullptr; if (CS.isNoBuiltin()) - return 0; + return nullptr; Function *Callee = CS.getCalledFunction(); if (!Callee || !Callee->isDeclaration()) - return 0; + return nullptr; return Callee; } @@ -94,17 +95,17 @@ static const AllocFnsTy *getAllocationData(const Value *V, AllocType AllocTy, bool LookThroughBitCast = false) { // Skip intrinsics if (isa(V)) - return 0; + return nullptr; Function *Callee = getCalledFunction(V, LookThroughBitCast); if (!Callee) - return 0; + return nullptr; // Make sure that the function is available. StringRef FnName = Callee->getName(); LibFunc::Func TLIFn; if (!TLI || !TLI->getLibFunc(FnName, TLIFn) || !TLI->has(TLIFn)) - return 0; + return nullptr; unsigned i = 0; bool found = false; @@ -115,11 +116,11 @@ static const AllocFnsTy *getAllocationData(const Value *V, AllocType AllocTy, } } if (!found) - return 0; + return nullptr; const AllocFnsTy *FnData = &AllocationFnData[i]; if ((FnData->AllocTy & AllocTy) != FnData->AllocTy) - return 0; + return nullptr; // Check function prototype. int FstParam = FnData->FstParam; @@ -135,7 +136,7 @@ static const AllocFnsTy *getAllocationData(const Value *V, AllocType AllocTy, FTy->getParamType(SndParam)->isIntegerTy(32) || FTy->getParamType(SndParam)->isIntegerTy(64))) return FnData; - return 0; + return nullptr; } static bool hasNoAliasAttr(const Value *V, bool LookThroughBitCast) { @@ -202,19 +203,19 @@ bool llvm::isOperatorNewLikeFn(const Value *V, const TargetLibraryInfo *TLI, /// ignore InvokeInst here. const CallInst *llvm::extractMallocCall(const Value *I, const TargetLibraryInfo *TLI) { - return isMallocLikeFn(I, TLI) ? dyn_cast(I) : 0; + return isMallocLikeFn(I, TLI) ? dyn_cast(I) : nullptr; } static Value *computeArraySize(const CallInst *CI, const DataLayout *DL, const TargetLibraryInfo *TLI, bool LookThroughSExt = false) { if (!CI) - return 0; + return nullptr; // The size of the malloc's result type must be known to determine array size. Type *T = getMallocAllocatedType(CI, TLI); if (!T || !T->isSized() || !DL) - return 0; + return nullptr; unsigned ElementSize = DL->getTypeAllocSize(T); if (StructType *ST = dyn_cast(T)) @@ -223,12 +224,12 @@ static Value *computeArraySize(const CallInst *CI, const DataLayout *DL, // If malloc call's arg can be determined to be a multiple of ElementSize, // return the multiple. Otherwise, return NULL. Value *MallocArg = CI->getArgOperand(0); - Value *Multiple = 0; + Value *Multiple = nullptr; if (ComputeMultiple(MallocArg, ElementSize, Multiple, LookThroughSExt)) return Multiple; - return 0; + return nullptr; } /// isArrayMalloc - Returns the corresponding CallInst if the instruction @@ -245,7 +246,7 @@ const CallInst *llvm::isArrayMalloc(const Value *I, return CI; // CI is a non-array malloc or we can't figure out that it is an array malloc. - return 0; + return nullptr; } /// getMallocType - Returns the PointerType resulting from the malloc call. @@ -257,12 +258,12 @@ PointerType *llvm::getMallocType(const CallInst *CI, const TargetLibraryInfo *TLI) { assert(isMallocLikeFn(CI, TLI) && "getMallocType and not malloc call"); - PointerType *MallocType = 0; + PointerType *MallocType = nullptr; unsigned NumOfBitCastUses = 0; // Determine if CallInst has a bitcast use. - for (Value::const_use_iterator UI = CI->use_begin(), E = CI->use_end(); - UI != E; ) + for (Value::const_user_iterator UI = CI->user_begin(), E = CI->user_end(); + UI != E;) if (const BitCastInst *BCI = dyn_cast(*UI++)) { MallocType = cast(BCI->getDestTy()); NumOfBitCastUses++; @@ -277,7 +278,7 @@ PointerType *llvm::getMallocType(const CallInst *CI, return cast(CI->getType()); // Type could not be determined. - return 0; + return nullptr; } /// getMallocAllocatedType - Returns the Type allocated by malloc call. @@ -288,7 +289,7 @@ PointerType *llvm::getMallocType(const CallInst *CI, Type *llvm::getMallocAllocatedType(const CallInst *CI, const TargetLibraryInfo *TLI) { PointerType *PT = getMallocType(CI, TLI); - return PT ? PT->getElementType() : 0; + return PT ? PT->getElementType() : nullptr; } /// getMallocArraySize - Returns the array size of a malloc call. If the @@ -308,7 +309,7 @@ Value *llvm::getMallocArraySize(CallInst *CI, const DataLayout *DL, /// is a calloc call. const CallInst *llvm::extractCallocCall(const Value *I, const TargetLibraryInfo *TLI) { - return isCallocLikeFn(I, TLI) ? cast(I) : 0; + return isCallocLikeFn(I, TLI) ? cast(I) : nullptr; } @@ -316,15 +317,15 @@ const CallInst *llvm::extractCallocCall(const Value *I, const CallInst *llvm::isFreeCall(const Value *I, const TargetLibraryInfo *TLI) { const CallInst *CI = dyn_cast(I); if (!CI || isa(CI)) - return 0; + return nullptr; Function *Callee = CI->getCalledFunction(); - if (Callee == 0 || !Callee->isDeclaration()) - return 0; + if (Callee == nullptr || !Callee->isDeclaration()) + return nullptr; StringRef FnName = Callee->getName(); LibFunc::Func TLIFn; if (!TLI || !TLI->getLibFunc(FnName, TLIFn) || !TLI->has(TLIFn)) - return 0; + return nullptr; unsigned ExpectedNumParams; if (TLIFn == LibFunc::free || @@ -335,18 +336,18 @@ const CallInst *llvm::isFreeCall(const Value *I, const TargetLibraryInfo *TLI) { TLIFn == LibFunc::ZdaPvRKSt9nothrow_t) // delete[](void*, nothrow) ExpectedNumParams = 2; else - return 0; + return nullptr; // Check free prototype. // FIXME: workaround for PR5130, this will be obsolete when a nobuiltin // attribute will exist. FunctionType *FTy = Callee->getFunctionType(); if (!FTy->getReturnType()->isVoidTy()) - return 0; + return nullptr; if (FTy->getNumParams() != ExpectedNumParams) - return 0; + return nullptr; if (FTy->getParamType(0) != Type::getInt8PtrTy(Callee->getContext())) - return 0; + return nullptr; return CI; } @@ -458,7 +459,7 @@ SizeOffsetType ObjectSizeOffsetVisitor::visitAllocaInst(AllocaInst &I) { SizeOffsetType ObjectSizeOffsetVisitor::visitArgument(Argument &A) { // no interprocedural analysis is done at the moment - if (!A.hasByValAttr()) { + if (!A.hasByValOrInAllocaAttr()) { ++ObjectVisitorArgument; return unknown(); }