[Bug tree-optimization/104203] [12 Regressions] huge compile-time regression in pointer_query since r12-6606-g9d6a0f388eb048f8

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104203

--- Comment #11 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Sebor <mse...@gcc.gnu.org>:

https://gcc.gnu.org/g:58ec0964b1d2f2ab197916cd661728f6a7a1736b

commit r12-6869-g58ec0964b1d2f2ab197916cd661728f6a7a1736b
Author: Martin Sebor <mse...@redhat.com>
Date:   Tue Jan 25 14:20:51 2022 -0700

    Avoid recomputing PHI results after failure (PR104203).

    Resolves:
    PR tree-optimization/104203 - huge compile-time regression in pointer_query

    gcc/ChangeLog:

            PR tree-optimization/104203
            * gimple-ssa-warn-access.cc (pass_data pass_data_waccess): Use
            TV_WARN_ACCESS.
            * pointer-query.cc (access_ref::merge_ref): Change return type.
            Convert failure to a conservative success.
            (access_ref::get_ref): Adjust to the change above.  Short-circuit
            PHI evaluation after first failure turned into conservative
success.
            * pointer-query.h (access_ref::merge_ref): Change return type.
            * timevar.def (TV_WARN_ACCESS): New timer variable.