[Bug bootstrap/36907] [4.4 Regression]: Gcc failed to bootstrap
gnu at the-meissners dot org
gcc-bugzilla@gcc.gnu.org
Thu Jul 24 19:20:00 GMT 2008
------- Comment #16 from gnu at the-meissners dot org 2008-07-24 19:19 -------
Subject: Re: [4.4 Regression]: Gcc failed to bootstrap
On Thu, Jul 24, 2008 at 05:49:02PM -0000, hjl dot tools at gmail dot com wrote:
>
>
> ------- Comment #15 from hjl dot tools at gmail dot com 2008-07-24 17:49 -------
> I don't think the middle-end should change optimization options
> which have been overridden by the backend.
>
>
> --
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36907
>
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I haven't done a bootstrap built yet, but could you try this patch on the
ia-64? When I try it via a cross compiler, it works fine, but I wonder whether
random ports will do weird things (like leak memory) if OVERRIDE_OPTIONS is run
a second time. I suspect we may need a macro that says whether it is safe to
run OVERRIDE_OPTIONS a second time.
2008-07-24 Michael Meissner <gnu@the-meissners.org>
* opts.c (decode_options): Rerun OVERRIDE_OPTIONS when being run a
second time to allow the backend to override the default options.
Index: gcc/opts.c
===================================================================
--- gcc/opts.c (revision 138117)
+++ gcc/opts.c (working copy)
@@ -1066,6 +1066,12 @@ decode_options (unsigned int argc, const
flag_unwind_tables = targetm.unwind_tables_default;
}
+#ifdef OVERRIDE_OPTIONS
+ /* Some machines may reject certain combinations of options. */
+ if (! first_time_p)
+ OVERRIDE_OPTIONS;
+#endif
+
#ifdef OPTIMIZATION_OPTIONS
/* Allow default optimizations to be specified on a per-machine basis. */
OPTIMIZATION_OPTIONS (optimize, optimize_size);
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36907
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