vendor/llvm/llvm-trunk-r321545

1 files changed, 6 insertions, 0 deletions

diff --git a/lib/Target/X86/X86WinEHState.cpp b/lib/Target/X86/X86WinEHState.cpp
index 0472a85f50da..6d6dedc60736 100644
--- a/lib/Target/X86/X86WinEHState.cpp
+++ b/lib/Target/X86/X86WinEHState.cpp
@@ -149,6 +149,12 @@ void WinEHStatePass::getAnalysisUsage(AnalysisUsage &AU) const {
 }
 
 bool WinEHStatePass::runOnFunction(Function &F) {
+  // Don't insert state stores or exception handler thunks for
+  // available_externally functions. The handler needs to reference the LSDA,
+  // which will not be emitted in this case.
+  if (F.hasAvailableExternallyLinkage())
+    return false;
+
   // Check the personality. Do nothing if this personality doesn't use funclets.
   if (!F.hasPersonalityFn())
     return false;