[Bug tree-optimization/93661] [10 Regression] ICE in tree_to_poly_int64, at tree.c:2976

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93661

Martin Sebor <msebor at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2020-02-10
                 CC|                            |msebor at gcc dot gnu.org
     Ever confirmed|0                           |1

--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
Bisection points to r273194:

2019-07-08  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/83518
        * tree-ssa-sccvn.c: Include splay-tree.h.
        (struct pd_range, struct pd_data): New.
        (struct vn_walk_cb_data): Add data to track partial definitions.
        (vn_walk_cb_data::~vn_walk_cb_data): New.
        (vn_walk_cb_data::push_partial_def): New.
        (pd_tree_alloc, pd_tree_dealloc, pd_range_compare): New.
        (vn_reference_lookup_2): When partial defs are registered give up.
        (vn_reference_lookup_3): Track partial defs for memset and
        constructor zeroing and for defs from constants.