Don't crash on code where the user put __attribute__((constructor)) on
a function with arguments. This fixes rdar://11265785.
llvm-svn: 155073
diff --git a/llvm/lib/Transforms/Scalar/ObjCARC.cpp b/llvm/lib/Transforms/Scalar/ObjCARC.cpp
index 7e3e69b..29234da 100644
--- a/llvm/lib/Transforms/Scalar/ObjCARC.cpp
+++ b/llvm/lib/Transforms/Scalar/ObjCARC.cpp
@@ -1033,7 +1033,11 @@
Value *Op = *OI;
// llvm.global_ctors is an array of pairs where the second members
// are constructor functions.
- Function *F = cast<Function>(cast<ConstantStruct>(Op)->getOperand(1));
+ Function *F = dyn_cast<Function>(cast<ConstantStruct>(Op)->getOperand(1));
+ // If the user used a constructor function with the wrong signature and
+ // it got bitcasted or whatever, look the other way.
+ if (!F)
+ continue;
// Only look at function definitions.
if (F->isDeclaration())
continue;