1 files changed, 6 insertions, 0 deletions
diff --git a/clang/lib/CodeGen/CGStmt.cpp b/clang/lib/CodeGen/CGStmt.cpp
index e4339849ca3..481fdbe2278 100644
--- a/clang/lib/CodeGen/CGStmt.cpp
+++ b/clang/lib/CodeGen/CGStmt.cpp
@@ -1021,6 +1021,12 @@ void CodeGenFunction::EmitReturnOfRValue(RValue RV, QualType Ty) {
 /// if the function returns void, or may be missing one if the function returns
 /// non-void.  Fun stuff :).
 void CodeGenFunction::EmitReturnStmt(const ReturnStmt &S) {
+  // Returning from an outlined SEH helper is UB, and we already warn on it.
+  if (IsOutlinedSEHHelper) {
+    Builder.CreateUnreachable();
+    Builder.ClearInsertionPoint();
+  }
+
   // Emit the result value, even if unused, to evalute the side effects.
   const Expr *RV = S.getRetValue();