This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug tree-optimization/26944] [4.1/4.2 Regression] -ftree-ch generates worse code
- From: "dberlin at dberlin dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 31 Mar 2006 22:41:10 -0000
- Subject: [Bug tree-optimization/26944] [4.1/4.2 Regression] -ftree-ch generates worse code
- References: <bug-26944-1008@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from dberlin at gcc dot gnu dot org 2006-03-31 22:41 -------
Subject: Re: [4.1/4.2 Regression] -ftree-ch
generates worse code
> Compare pretmp.28_49 with pretmp.32_11, why are the arguments in a different
> order? Is there something unstable in the PRE algorithm?
>
No, we just call fold on the expressions we build, and whatever it gives
us, we use :)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26944