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| author | dim <dim@FreeBSD.org> | 2012-04-14 13:54:10 +0000 |
|---|---|---|
| committer | dim <dim@FreeBSD.org> | 2012-04-14 13:54:10 +0000 |
| commit | 1fc08f5e9ef733ef1ce6f363fecedc2260e78974 (patch) | |
| tree | 19c69a04768629f2d440944b71cbe90adae0b615 /lib/VMCore/Function.cpp | |
| parent | 07637c87f826cdf411f0673595e9bc92ebd793f2 (diff) | |
| download | FreeBSD-src-1fc08f5e9ef733ef1ce6f363fecedc2260e78974.zip FreeBSD-src-1fc08f5e9ef733ef1ce6f363fecedc2260e78974.tar.gz | |
Vendor import of llvm trunk r154661:
http://llvm.org/svn/llvm-project/llvm/trunk@r154661
Diffstat (limited to 'lib/VMCore/Function.cpp')
| -rw-r--r-- | lib/VMCore/Function.cpp | 52 |
1 files changed, 20 insertions, 32 deletions
diff --git a/lib/VMCore/Function.cpp b/lib/VMCore/Function.cpp index 1215e6a..af6344e 100644 --- a/lib/VMCore/Function.cpp +++ b/lib/VMCore/Function.cpp @@ -39,6 +39,8 @@ template class llvm::SymbolTableListTraits<BasicBlock, Function>; // Argument Implementation //===----------------------------------------------------------------------===// +void Argument::anchor() { } + Argument::Argument(Type *Ty, const Twine &Name, Function *Par) : Value(Ty, Value::ArgumentVal) { Parent = 0; @@ -359,7 +361,7 @@ std::string Intrinsic::getName(ID id, ArrayRef<Type*> Tys) { FunctionType *Intrinsic::getType(LLVMContext &Context, ID id, ArrayRef<Type*> Tys) { Type *ResultTy = NULL; - std::vector<Type*> ArgTys; + SmallVector<Type*, 8> ArgTys; bool IsVarArg = false; #define GET_INTRINSIC_GENERATOR @@ -370,13 +372,9 @@ FunctionType *Intrinsic::getType(LLVMContext &Context, } bool Intrinsic::isOverloaded(ID id) { - static const bool OTable[] = { - false, #define GET_INTRINSIC_OVERLOAD_TABLE #include "llvm/Intrinsics.gen" #undef GET_INTRINSIC_OVERLOAD_TABLE - }; - return OTable[id]; } /// This defines the "Intrinsic::getAttributes(ID id)" method. @@ -402,6 +400,7 @@ Function *Intrinsic::getDeclaration(Module *M, ID id, ArrayRef<Type*> Tys) { bool Function::hasAddressTaken(const User* *PutOffender) const { for (Value::const_use_iterator I = use_begin(), E = use_end(); I != E; ++I) { const User *U = *I; + // FIXME: Check for blockaddress, which does not take the address. if (!isa<CallInst>(U) && !isa<InvokeInst>(U)) return PutOffender ? (*PutOffender = U, true) : true; ImmutableCallSite CS(cast<Instruction>(U)); @@ -411,41 +410,30 @@ bool Function::hasAddressTaken(const User* *PutOffender) const { return false; } +bool Function::isDefTriviallyDead() const { + // Check the linkage + if (!hasLinkOnceLinkage() && !hasLocalLinkage() && + !hasAvailableExternallyLinkage()) + return false; + + // Check if the function is used by anything other than a blockaddress. + for (Value::const_use_iterator I = use_begin(), E = use_end(); I != E; ++I) + if (!isa<BlockAddress>(*I)) + return false; + + return true; +} + /// callsFunctionThatReturnsTwice - Return true if the function has a call to /// setjmp or other function that gcc recognizes as "returning twice". -/// -/// FIXME: Remove after <rdar://problem/8031714> is fixed. -/// FIXME: Is the above FIXME valid? bool Function::callsFunctionThatReturnsTwice() const { - static const char *const ReturnsTwiceFns[] = { - "_setjmp", - "setjmp", - "sigsetjmp", - "setjmp_syscall", - "savectx", - "qsetjmp", - "vfork", - "getcontext" - }; - - for (const_inst_iterator I = inst_begin(this), E = inst_end(this); I != E; - ++I) { + for (const_inst_iterator + I = inst_begin(this), E = inst_end(this); I != E; ++I) { const CallInst* callInst = dyn_cast<CallInst>(&*I); if (!callInst) continue; if (callInst->canReturnTwice()) return true; - - // check for known function names. - // FIXME: move this to clang. - Function *F = callInst->getCalledFunction(); - if (!F) - continue; - StringRef Name = F->getName(); - for (unsigned J = 0, e = array_lengthof(ReturnsTwiceFns); J != e; ++J) { - if (Name == ReturnsTwiceFns[J]) - return true; - } } return false; |
