From: Eric Botcazou <ebotcazou@adacore.com>
To: "H.J. Lu" <hjl.tools@gmail.com>
Cc: gcc-patches@gcc.gnu.org
Subject: Re: PATCH: PR rtl-optimization/49504: Invalid optimization for Pmode != ptr_mode
Date: Fri, 24 Jun 2011 14:18:00 -0000 [thread overview]
Message-ID: <201106241607.51611.ebotcazou@adacore.com> (raw)
In-Reply-To: <BANLkTi=uNifksMKzwTyWT93Kv+ihFtiO4Q@mail.gmail.com>
> I compared x32 glibc built with the old x32 gcc against x32 glibc built
> with this patch and
>
> http://gcc.gnu.org/ml/gcc-patches/2011-06/msg00913.html
>
> reverted, the new glibc is little smaller:
>
> New:
>
> [hjl@gnu-33 build-x86_64-linux]$ size libc.so
> text data bss dec hex filename
> 1537648 10076 12944 1560668 17d05c libc.so
> [hjl@gnu-33 build-x86_64-linux]$
>
> Old:
>
> [hjl@gnu-33 build-x86_64-linux.old]$ size libc.so
> text data bss dec hex filename
> 1538968 10076 12944 1561988 17d584 libc.so
> [hjl@gnu-33 build-x86_64-linux.old]$
>
> I looked at assembly codes. The new one is better.
> I will check it in.
OK, but remove the equivalent code in num_sign_bit_copies1 then, otherwise
someone in a couple of years from now will adapt it to nonzero_bits1 and we
will be back to square one.
--
Eric Botcazou
next prev parent reply other threads:[~2011-06-24 14:08 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-22 19:39 H.J. Lu
2011-06-23 14:08 ` H.J. Lu
2011-06-24 10:00 ` Eric Botcazou
2011-06-24 13:55 ` H.J. Lu
2011-06-24 14:18 ` Eric Botcazou [this message]
2011-06-24 14:38 ` H.J. Lu
2011-06-24 15:50 ` H.J. Lu
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