http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50251
Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |ebotcazou at gcc dot
| |gnu.org
--- Comment #17 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-09-03
09:47:08 UTC ---
> This patch sets need_drap when a stack_restore is present at expand, which
> allows both the 20010209-1.c and the stack-stave-restore.c testcase to
> succeed:
> ...
> Index: src/gcc-mainline/gcc/explow.c
> ===================================================================
> --- src/gcc-mainline/gcc/explow.c (revision 178379)
> +++ src/gcc-mainline/gcc/explow.c (working copy)
> @@ -1062,6 +1062,9 @@ emit_stack_restore (enum save_level save
> /* The default is that we use a move insn. */
> rtx (*fcn) (rtx, rtx) = gen_move_insn;
>
> + if (SUPPORTS_STACK_ALIGNMENT)
> + crtl->need_drap = true;
> +
> /* See if this machine has anything special to do for this kind of save.
> */
> switch (save_level)
> {
> ...
Does this force stack realignment, or only the use of the DRAP if we already do
stack realignment?
