[SEH] Don't assert if the parent function lacks a personality

The EH code might have been deleted as unreachable and the personality
pruned while the filter is still present.  Currently I'm hitting this at
-O0 due to the clang bug PR24009.

llvm-svn: 241170

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 6d4f817ad67..eab9e0fbe5b 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -15011,6 +15011,12 @@ static SDValue recoverFramePointer(SelectionDAG &DAG, const Function *Fn,
   const TargetLowering &TLI = DAG.getTargetLoweringInfo();
   MVT PtrVT = TLI.getPointerTy();
 
+  // It's possible that the parent function no longer has a personality function
+  // if the exceptional code was optimized away, in which case we just return
+  // the incoming EBP.
+  if (!Fn->hasPersonalityFn())
+    return EntryEBP;
+
   // The RegNodeSize is 6 32-bit words for SEH and 4 for C++ EH. See
   // WinEHStatePass for the full struct definition.
   int RegNodeSize;