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[Bug target/23302] [4.1 Regression] extra move generated on x86
- From: "hubicka at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 31 Oct 2005 18:15:24 -0000
- Subject: [Bug target/23302] [4.1 Regression] extra move generated on x86
- References: <bug-23302-1008@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #6 from hubicka at gcc dot gnu dot org 2005-10-31 18:15 -------
Actually the cited 4.0 sequence do not obey the const int x86_read_modify =
~(m_PENT | m_PPRO);
setting -march=athlon or using -Os makes the move go away. Additionally I get
following sequence out of 4.0 in SUSE distro:
movl term, %eax
movl 4012(%ebx), %ecx
movl 4028(%eax), %eax
imull %ecx, %eax
that also contains the extra memory move.
So I am going to close this as invalid.
Honza
--
hubicka at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |INVALID
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23302