1 files changed, 9 insertions, 0 deletions
diff --git a/contrib/gcc/expr.c b/contrib/gcc/expr.c
index f0e63bcc205f..9f7c2847c58d 100644
--- a/contrib/gcc/expr.c
+++ b/contrib/gcc/expr.c
@@ -1425,6 +1425,15 @@ convert_modes (mode, oldmode, x, unsignedp)
       return gen_lowpart (mode, x);
     }
 
+  /* Converting from integer constant into mode is always equivalent to an
+     subreg operation.  */
+  if (VECTOR_MODE_P (mode) && GET_MODE (x) == VOIDmode)
+    {
+      if (GET_MODE_BITSIZE (mode) != GET_MODE_BITSIZE (oldmode))
+	abort ();
+      return simplify_gen_subreg (mode, x, oldmode, 0);
+    }
+
   temp = gen_reg_rtx (mode);
   convert_move (temp, x, unsignedp);
   return temp;