[Bug middle-end/89779] [9 Regression] internal compiler error: tree check: expected class ‘type’, have ‘exceptional’ (error_mark) in tree_nop_conversion_p, at tree.c:12798

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89779

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Mar 25 12:18:38 2019
New Revision: 269914

URL: https://gcc.gnu.org/viewcvs?rev=269914&root=gcc&view=rev
Log:
2019-03-25  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/89779
        * tree-ssa-loop-ivopts.c (remove_unused_ivs): Return
        to remove IV defs, delay actual removal.
        (tree_ssa_iv_optimize_loop): Likewise.  Avoid SCEV reset.
        (tree_ssa_iv_optimize): Remove eliminated IV defs at the
        very end, properly also reset loop control IV information.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-loop-ivopts.c