1 files changed, 4 insertions, 1 deletions
diff --git a/gcc/cp/cp-gimplify.c b/gcc/cp/cp-gimplify.c
index a4d59f5..aa71746 100644
--- a/gcc/cp/cp-gimplify.c
+++ b/gcc/cp/cp-gimplify.c
@@ -596,7 +596,10 @@ cp_genericize_r (tree *stmt_p, int *walk_subtrees, void *data)
   tree stmt = *stmt_p;
   struct pointer_set_t *p_set = (struct pointer_set_t*) data;
 
-  if (is_invisiref_parm (stmt))
+  if (is_invisiref_parm (stmt)
+      /* Don't dereference parms in a thunk, pass the references through. */
+      && !(DECL_THUNK_P (current_function_decl)
+           && TREE_CODE (stmt) == PARM_DECL))
     {
       *stmt_p = convert_from_reference (stmt);
       *walk_subtrees = 0;