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Re: New GCC releases comparison and comparison of GCC4.4 and LLVM2.5 on SPEC2000
- From: "Joseph S. Myers" <joseph at codesourcery dot com>
- To: Chris Lattner <clattner at apple dot com>
- Cc: Vladimir Makarov <vmakarov at redhat dot com>, "gcc.gcc.gnu.org" <gcc at gcc dot gnu dot org>, Evan Cheng <evan dot cheng at apple dot com>
- Date: Tue, 12 May 2009 18:05:34 +0000 (UTC)
- Subject: Re: New GCC releases comparison and comparison of GCC4.4 and LLVM2.5 on SPEC2000
- References: <4A098018.1030900@redhat.com> <CFB21785-5057-4A8B-9DC7-1C0CBC4D0EDB@apple.com>
On Tue, 12 May 2009, Chris Lattner wrote:
> 1. I have a hard time understanding the code size numbers. Does 10% mean that
> GCC is generating 10% bigger or 10% smaller code than llvm?
I have a different comment on the code size numbers: could we have
comparisons of code size for -Os rather than (or in addition to) -O2 and
-O3? If someone is particularly concerned with code size, -Os is what
they are expected to use.
--
Joseph S. Myers
joseph@codesourcery.com