1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/tree-cfg.c b/gcc/tree-cfg.c
index 5a74e82613b..7e9947f6f7e 100644
--- a/gcc/tree-cfg.c
+++ b/gcc/tree-cfg.c
@@ -4943,6 +4943,10 @@ gimple_move_block_after (basic_block bb, basic_block after)
 static bool
 gimple_can_duplicate_bb_p (const_basic_block bb ATTRIBUTE_UNUSED)
 {
+  gimple_seq_node last = gimple_seq_last (bb_seq (bb));
+  /* We cannot duplicate GIMPLE_RESXs due to expander limitations.  */
+  if (last && gimple_code (last->stmt) == GIMPLE_RESX)
+    return false;
   return true;
 }