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[Bug tree-optimization/26939] loop number of iterations analysis confused by what PRE did (PRE is doing its job)
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 30 Mar 2006 22:25:34 -0000
- Subject: [Bug tree-optimization/26939] loop number of iterations analysis confused by what PRE did (PRE is doing its job)
- References: <bug-26939-10053@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #11 from rguenth at gcc dot gnu dot org 2006-03-30 22:25 -------
Note that the patch for 23855 will only help for invariant conditions in the
loop header, while the problem exists also for non-invariant ones. So, as
Danny notes, SCEV should be improved to maybe handle this case.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26939