This is the mail archive of the
gcc-bugs@gcc.gnu.org
mailing list for the GCC project.
[Bug regression/33928] [4.3 Regression] 22% performance slowdown from 4.2.2 to 4.3.0 in floating-point code
- From: "bonzini at gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 30 Nov 2007 14:58:45 -0000
- Subject: [Bug regression/33928] [4.3 Regression] 22% performance slowdown from 4.2.2 to 4.3.0 in floating-point code
- References: <bug-33928-271@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #18 from bonzini at gnu dot org 2007-11-30 14:58 -------
It would be -fno-forward-propagate, but what I meant is that the changes
*connected to* fwprop could be the culprit. One has to look at dumps to
understand if this is the case.
It would be possible, maybe, to put an asm around the problematic basic block,
so that one could plot the number of instructions in that basic block over
time?
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=33928