[Cloning] Teach CloneModule about personality functions

CloneModule didn't take into account that it needed to remap the value
using values in the module.

This fixes PR23992.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241122 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Utils/CloneModule.cpp

@@ -99,7 +99,11 @@ Module *llvm::CloneModule(const Module *M, ValueToValueMapTy &VMap) {
 
       SmallVector<ReturnInst*, 8> Returns;  // Ignore returns cloned.
       CloneFunctionInto(F, I, VMap, /*ModuleLevelChanges=*/true, Returns);
+
     }
+
+    if (I->hasPersonalityFn())
+      F->setPersonalityFn(MapValue(I->getPersonalityFn(), VMap));
   }
 
   // And aliases