This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug optimization/13355] Suboptimal code generated
- From: "kazu at cs dot umass dot edu" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 24 Dec 2003 04:16:36 -0000
- Subject: [Bug optimization/13355] Suboptimal code generated
- References: <20031208151203.13355.arjanv@redhat.com>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From kazu at cs dot umass dot edu 2003-12-24 04:16 -------
A reduced testcase for the second case.
On mainline, i686-pc-linux-gnu.
/* -march=i686 -mtune=i686 -fomit-frame-pointer -O2 */
register int ebx asm ("ebx");
register int dummy1 asm ("esi");
register int dummy2 asm ("ebp");
int
foo (int arg)
{
long long res = (long long) arg * (long long) ebx;
return (int) res;
}
Global variables take up three registers from IA-32!
--
What |Removed |Added
----------------------------------------------------------------------------
CC| |kazu at cs dot umass dot edu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13355