On Nov 19, 2014, at 1:57 PM, Jakub Jelinek <ja...@redhat.com> wrote:
> Though, following patch is just fine for me too, I don't think it will
> make a significant difference:
This version is fine by me.
> --- gcc/simplify-rtx.c 2014-11-19 15:39:24.073113107 +0100
> +++ gcc/simplify-rtx.c 2014-11-19 22:55:44.201464253 +0100
> @@ -5504,6 +5504,8 @@ simplify_immed_subreg (machine_mode oute
> HOST_WIDE_INT tmp[MAX_BITSIZE_MODE_ANY_INT /
> HOST_BITS_PER_WIDE_INT];
> wide_int r;
>
> + if (GET_MODE_PRECISION (outer_submode) > MAX_BITSIZE_MODE_ANY_INT)
> + return NULL_RTX;
> for (u = 0; u < units; u++)
> {
> unsigned HOST_WIDE_INT buf = 0;
> @@ -5515,10 +5517,13 @@ simplify_immed_subreg (machine_mode oute
> tmp[u] = buf;
> base += HOST_BITS_PER_WIDE_INT;
> }
> - gcc_assert (GET_MODE_PRECISION (outer_submode)
> - <= MAX_BITSIZE_MODE_ANY_INT);
> r = wide_int::from_array (tmp, units,
> GET_MODE_PRECISION (outer_submode));
> +#if TARGET_SUPPORTS_WIDE_INT == 0
> + /* Make sure r will fit into CONST_INT or CONST_DOUBLE. */
> + if (wi::min_precision (r, SIGNED) > HOST_BITS_PER_DOUBLE_INT)
> + return NULL_RTX;
> +#endif
