[Bug middle-end/83487] [8 Regression] ICE in expand_call, at calls.c:4098

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83487

--- Comment #13 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Perhaps:
--- gcc/config/i386/i386.c.jj   2017-12-21 09:44:34.000000000 +0100
+++ gcc/config/i386/i386.c      2017-12-21 13:04:03.172252517 +0100
@@ -8973,6 +8973,8 @@ ix86_function_arg_boundary (machine_mode
         the main variant type.  */
       type = TYPE_MAIN_VARIANT (type);
       align = TYPE_ALIGN (type);
+      if (TYPE_EMPTY_P (type))
+       return PARM_BOUNDARY;
     }
   else
     align = GET_MODE_ALIGNMENT (mode);