[ORC] Don't call isa<> on a null value.

This should fix the recent builder failures in the test-global-ctors.ll testcase.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@335680 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/ExecutionEngine/Orc/ExecutionUtils.cpp b/lib/ExecutionEngine/Orc/ExecutionUtils.cpp
index 95f039a..6157677 100644 (file)
--- a/lib/ExecutionEngine/Orc/ExecutionUtils.cpp
+++ b/lib/ExecutionEngine/Orc/ExecutionUtils.cpp
@@ -109,7 +109,7 @@ CtorDtorIterator::Element CtorDtorIterator::operator*() const {
 
   ConstantInt *Priority = dyn_cast<ConstantInt>(CS->getOperand(0));
   Value *Data = CS->getNumOperands() == 3 ? CS->getOperand(2) : nullptr;
-  if (!isa<GlobalValue>(Data))
+  if (Data && !isa<GlobalValue>(Data))
     Data = nullptr;
   return Element(Priority->getZExtValue(), Func, Data);
 }