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[Bug tree-optimization/66430] IPA CP alignment information is not used for expression simplification
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 08 Jun 2015 10:10:49 +0000
- Subject: [Bug tree-optimization/66430] IPA CP alignment information is not used for expression simplification
- Auto-submitted: auto-generated
- References: <bug-66430-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66430
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-06-08
CC| |rguenth at gcc dot gnu.org
Component|ipa |tree-optimization
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hmm.
Visiting statement:
_4 = _3 & 7;
which is likely CONSTANT
Lattice value changed to CONSTANT 0x0 (0x5). Adding SSA edges to worklist.
marking stmt to be not simulated again
so you expect it to be optimized to 5 but CCP does not propagate known
misalignment.