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[Bug tree-optimization/19098] tree-ssa-dom.c has an "if" statement whose condition is probably wrong
- 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: 21 Dec 2004 08:07:42 -0000
- Subject: [Bug tree-optimization/19098] tree-ssa-dom.c has an "if" statement whose condition is probably wrong
- References: <20041221055923.19098.kazu@cs.umass.edu>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From kazu at cs dot umass dot edu 2004-12-21 08:07 -------
Can we do something like the following?
Avoid creating multiple entries to into a loop before the loop optimizations run.
Try to thread every edge after the loop optimizations run.
The loop optimizers probably don't like irreducible loops,
but I guess the real CPU doesn't care about them, and
if we can skip some conditional jumps, that might be good.
I don't know if this idea is any good, but just a thought.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19098