On Tue, 1 Dec 2015, Jan Hubicka wrote:
> Hi,
> memory attributes are currently optimized and attached to RTL even when not
> optimizing. This is obviously just a wasted effort.
Huh, are you sure? What about globals used from different optimize
contexts?
> Bootstrapped/regtested x86_64-linux, OK?
I don't think so. Did you bootstrap with BOOT_CFLAGS="-O0 -g"?
Richard.
> Honza
> * emit-rtl.c (set_mem_attrs, set_mem_attributes_minus_bitpos):
> Do not compute memory attributes when not optimizing.
>
> Index: emit-rtl.c
> ===================================================================
> --- emit-rtl.c (revision 231081)
> +++ emit-rtl.c (working copy)
> @@ -336,7 +336,8 @@ static void
> set_mem_attrs (rtx mem, mem_attrs *attrs)
> {
> /* If everything is the default, we can just clear the attributes. */
> - if (mem_attrs_eq_p (attrs, mode_mem_attrs[(int) GET_MODE (mem)]))
> + if (!optimize
> + || mem_attrs_eq_p (attrs, mode_mem_attrs[(int) GET_MODE (mem)]))
> {
> MEM_ATTRS (mem) = 0;
> return;
> @@ -1749,6 +1750,9 @@ set_mem_attributes_minus_bitpos (rtx ref
> struct mem_attrs attrs, *defattrs, *refattrs;
> addr_space_t as;
>
> + if (!optimize)
> + return;
> +
> /* It can happen that type_for_mode was given a mode for which there
> is no language-level type. In which case it returns NULL, which
> we can see here. */
>
>
--
Richard Biener <rguent...@suse.de>
SUSE LINUX GmbH, GF: Felix Imendoerffer, Jane Smithard, Graham Norton, HRB
21284 (AG Nuernberg)
