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Re: optimization/3329: optimization large memory copies uses kernel memcpy function without user's knowledge.
- From: "Joseph S. Myers" <jsm28 at cam dot ac dot uk>
- To: nobody at gcc dot gnu dot org
- Cc: gcc-prs at gcc dot gnu dot org,
- Date: 2 Apr 2002 21:26:02 -0000
- Subject: Re: optimization/3329: optimization large memory copies uses kernel memcpy function without user's knowledge.
- Reply-to: "Joseph S. Myers" <jsm28 at cam dot ac dot uk>
The following reply was made to PR optimization/3329; it has been noted by GNATS.
From: "Joseph S. Myers" <jsm28@cam.ac.uk>
To: Richard Henderson <rth@redhat.com>
Cc: "Araneda, Dorian" <dorian.araneda@intel.com>,
"'rth@gcc.gnu.org'" <rth@gcc.gnu.org>,
"'gcc-bugs@gcc.gnu.org'" <gcc-bugs@gcc.gnu.org>,
"'gcc-gnats@gcc.gnu.org'" <gcc-gnats@gcc.gnu.org>
Subject: Re: optimization/3329: optimization large memory copies uses kern
el memcpy function without user's knowledge.
Date: Tue, 2 Apr 2002 22:22:33 +0100 (BST)
On Tue, 2 Apr 2002, Richard Henderson wrote:
> Then you can't use gcc at all. We reserve the right to generate
> code that calls into any of the compiler support routines in libgcc,
> plus a select number of ISO C routines from libc. (The fact that
The documentation for -ffreestanding should detail what ISO C library
functions may be used (apart from __builtin functions potentially becoming
calls to the non-__builtin versions of those functions or others).
--
Joseph S. Myers
jsm28@cam.ac.uk