Also map the personality function in CloneFunctionInto

Summary: The Old personality function gets copied over, but the
Materializer didn't  have a chance to inspect it (e.g. to fix up
references to the correct module for the target function).
Also add a verifier check that makes sure the personality routine
is in the same module as the function whose personality it is.

Reviewers: majnemer

Subscribers: jevinskie, llvm-commits

Differential Revision: http://reviews.llvm.org/D14474

llvm-svn: 253183

llvm/lib/IR/Verifier.cpp

@@ -1715,6 +1715,14 @@ void Verifier::visitFunction(const Function &F) {
   assert(F.hasMetadata() != MDs.empty() && "Bit out-of-sync");
   VerifyFunctionMetadata(MDs);
 
+  // Check validity of the personality function
+  if (F.hasPersonalityFn()) {
+    auto *Per = dyn_cast<Function>(F.getPersonalityFn()->stripPointerCasts());
+    if (Per)
+      Assert(Per->getParent() == F.getParent(),
+             "Referencing personality function in another module!", &F, Per);
+  }
+
   if (F.isMaterializable()) {
     // Function has a body somewhere we can't see.
     Assert(MDs.empty(), "unmaterialized function cannot have metadata", &F,

llvm/lib/Transforms/Utils/CloneFunction.cpp

@@ -95,6 +95,13 @@ void llvm::CloneFunctionInto(Function *NewFunc, const Function *OldFunc,
   NewFunc->copyAttributesFrom(OldFunc);
   NewFunc->setAttributes(NewAttrs);
 
+  // Fix up the personality function that got copied over.
+  if (OldFunc->hasPersonalityFn())
+    NewFunc->setPersonalityFn(
+        MapValue(OldFunc->getPersonalityFn(), VMap,
+                 ModuleLevelChanges ? RF_None : RF_NoModuleLevelChanges,
+                 TypeMapper, Materializer));
+
   AttributeSet OldAttrs = OldFunc->getAttributes();
   // Clone any argument attributes that are present in the VMap.
   for (const Argument &OldArg : OldFunc->args())