--- a/gcc/ira-color.c
+++ b/gcc/ira-color.c
@@ -2941,8 +2941,9 @@ move_spill_restore (void)
                 copies and the reload pass can spill the allocno set
                 by copy although the allocno will not get memory
                 slot.  */
-             || ira_reg_equiv_invariant_p[regno]
-             || ira_reg_equiv_const[regno] != NULL_RTX
+             || (regno < ira_reg_equiv_len
+                 && (ira_reg_equiv_invariant_p[regno]
+                     || ira_reg_equiv_const[regno] != NULL_RTX))
              || !bitmap_bit_p (loop_node->border_allocnos, ALLOCNO_NUM (a)))
            continue;
          mode = ALLOCNO_MODE (a);