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[Bug target/49742] [4.7 Regression] ICE for gcc.dg/vect/O3-pr39675-2.c on ARM
- 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, 18 Jul 2011 08:24:42 +0000
- Subject: [Bug target/49742] [4.7 Regression] ICE for gcc.dg/vect/O3-pr39675-2.c on ARM
- Auto-submitted: auto-generated
- References: <bug-49742-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49742
--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-07-18 08:24:40 UTC ---
This must be an artifact of the load-/store-lanes stuff. It looks like they
play foul with aliasing. It might also be that predictive commoning simply
does not know how to re-materialize calls (they seem to be analyzed as
only loading the memory arguments by data-reference analysis, so if predcom
tries to split them that will obviously fail - not sure if it's a good idea
to do the call handling the way get_references_in_stmt does).