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Re: GCC 3.1 Issues
- From: Jakub Jelinek <jakub at redhat dot com>
- To: Richard Henderson <rth at redhat dot com>, Andreas Jaeger <aj at suse dot de>
- Cc: Mark Mitchell <mark at codesourcery dot com>, gcc-patches at gcc dot gnu dot org
- Date: Sat, 9 Mar 2002 20:57:25 +0100
- Subject: Re: GCC 3.1 Issues
- References: <45810000.1015438826@gandalf.codesourcery.com> <u84rjrrpfv.fsf@gromit.moeb>
- Reply-to: Jakub Jelinek <jakub at redhat dot com>
On Fri, Mar 08, 2002 at 05:31:48PM +0100, Andreas Jaeger wrote:
> Mark Mitchell <mark@codesourcery.com> writes:
>
> > If you know of regressions in GCC 3.1 relative to previous releases,
> > or major issues that stand between us and a GCC 3.0 release, please
> > file PRs in GNATS and send the PR numbers to me.
>
> I have two PRs that might be related:
> - PR 5172: A miscompilation of glibc on i686, this is fixed if store
> motion is disable.
> - PR 5200: Store motion is broken (the PR is a pointer to some
> messages so that this topic get reviewed before the 3.1 release).
>
> Store motion seems to have some serious bugs (generating wrong code)
> and if those are not getting fixed, I propose to disable store motion
> completly.
>
> Since store motion is a new feature relative to 3.0, any bugs in store
> motion are regressions.
Ok for branch then?
Bootstrapped and regtested on {i386,ia64}-redhat-linux.
2002-03-09 Jakub Jelinek <jakub@redhat.com>
PR optimization/5172, optimization/5200
* gcse.c (gcse_main): Disable store_motion.
--- gcc/gcse.c.jj Tue Feb 19 11:13:09 2002
+++ gcc/gcse.c Sat Mar 9 21:01:54 2002
@@ -903,7 +903,8 @@ gcse_main (f, file)
end_alias_analysis ();
allocate_reg_info (max_reg_num (), FALSE, FALSE);
- if (!optimize_size && flag_gcse_sm)
+ /* Store motion disabled until it is fixed. */
+ if (0 && !optimize_size && flag_gcse_sm)
store_motion ();
/* Record where pseudo-registers are set. */
return run_jump_opt_after_gcse;
Jakub