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From: Geoffrey Keating <geoffk@apple.com>
To: nobody@gcc.gnu.org
Cc: gcc-prs@gcc.gnu.org,
Subject: Re: c++/10039: [macosx] gcc hangs at a c++-Constructor with switch "-Os"
Date: Wed, 26 Mar 2003 22:32:00 -0000 [thread overview]
Message-ID: <20030326222600.1787.qmail@sources.redhat.com> (raw)
The following reply was made to PR c++/10039; it has been noted by GNATS.
From: Geoffrey Keating <geoffk@apple.com>
To: dixl@medimach.de, gcc-gnats@gcc.gnu.org, gcc-bugs@gcc.gnu.org,
nobody@gcc.gnu.org, gcc-prs@gcc.gnu.org
Cc:
Subject: Re: c++/10039: [macosx] gcc hangs at a c++-Constructor with switch "-Os"
Date: Wed, 26 Mar 2003 14:25:30 -0800
Dix says this was filed as Apple Radar 3042899, quite some time ago.
In summary:
The compiler is not really hanging, just taking a very long time
(hours). The problem is specific to -Os. A workaround for released
compilers is to add -fno-gcse, or use -O2 instead of -Os.
-fno-schedule-insns will also help.
It looks like later compiler releases (3.3, 3.4, the next Apple
compiler release) will have the performance bottlenecks improved, down
to sane numbers (like 10 minutes, with no workarounds, or 1 minute with
-fno-schedule-insns in 3.3, and better in 3.4).
--
Geoff Keating <geoffk@apple.com>
next reply other threads:[~2003-03-26 22:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-26 22:32 Geoffrey Keating [this message]
-- strict thread matches above, loose matches on Subject: below --
2003-03-26 22:34 geoffk
2003-03-26 18:36 Geoffrey Keating
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