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[Bug tree-optimization/16962] loop unrolling with x86-64 asm not efficient
- From: "falk at debian dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 10 Aug 2004 14:09:02 -0000
- Subject: [Bug tree-optimization/16962] loop unrolling with x86-64 asm not efficient
- References: <20040810134244.16962.tomstdenis@iahu.ca>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From falk at debian dot org 2004-08-10 14:08 -------
Please use the attachment function for large files in the future. Note also
we don't want assembly output anyway (as stated on http://gcc.gnu.org/bugs.html).
Loop work is currently only being done at the lno-branch. It would be nice
if you could test it there.
Also, this way of unrolling loops doesn't seem fundamentally wrong to me
Can you provide performance numbers that show that it is worse?
--
What |Removed |Added
----------------------------------------------------------------------------
Component|c |tree-optimization
GCC build triplet|gcc version 3.4.1 (Gentoo |x86_86-linux
|Linux 3.4.1, ssp-3.4-2, pie-|
|8.7.6.3) |
GCC host triplet|Linux timmy 2.6.7-gentoo-r11|x86_86-linux
|#1 Thu Aug 5 01:49:49 UTC |
|2004 x86_ |
GCC target triplet|gcc version 3.4.1 (Gentoo |x86_86-linux
|Linux 3.4.1, ssp-3.4-2, pie-|
|8.7.6.3) |
Keywords| |missed-optimization
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16962