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[Bug tree-optimization/81418] [8 Regression] ICE in vect_get_vec_def_for_stmt_copy
- 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, 17 Jul 2017 12:31:14 +0000
- Subject: [Bug tree-optimization/81418] [8 Regression] ICE in vect_get_vec_def_for_stmt_copy
- Auto-submitted: auto-generated
- References: <bug-81418-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81418
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
Hrm. So whenever a reducing pattern is exercised in the reduction "chain" we
cannot handle regular uses of the PHI as we basically have to force a
single_defuse_cycle.
So we can't vectorize this case but we fail to reject it.