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[Bug tree-optimization/32183] [4.3 Regression] reassoc2 can more extra calculations into a loop
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 2 Jun 2007 00:58:58 -0000
- Subject: [Bug tree-optimization/32183] [4.3 Regression] reassoc2 can more extra calculations into a loop
- References: <bug-32183-682@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #12 from pinskia at gcc dot gnu dot org 2007-06-02 00:58 -------
Maybe someone should timings without the second reassoc.
Jeff mentioned the loop optimizers cause new reassociations:
http://gcc.gnu.org/ml/gcc-patches/2005-12/msg00469.html
And Daniel Berlin agreed with him (but this was before a DCE was added):
http://gcc.gnu.org/ml/gcc-patches/2005-12/msg00473.html
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32183