[Bug tree-optimization/71437] [7 regression] Performance regression after r235817

[law at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71437

--- Comment #18 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Thu Mar 16 03:19:35 2017
New Revision: 246186

URL: https://gcc.gnu.org/viewcvs?rev=246186&root=gcc&view=rev
Log:
        PR tree-optimization/71437
        * tree-ssa-dom.c (struct cond_equivalence): Moved from here into
        tree-ssa-scopedtables.
        (lookup_avail_expr, build_and_record_new_cond): Likewise.
        (record_conditions, record_cond, vuse_eq): Likewise.
        (record_edge_info): Adjust to API tweak of record_conditions.
        (simplify_stmt_for_jump_threading): Similarly for lookup_avail_expr.
        (record_temporary_equivalences, optimize_stmt): Likewise.
        (eliminate_redundant_computations): Likewise.
        (record_equivalences_from_stmt): Likewise.
        * tree-ssa-scopedtables.c: Include options.h and params.h.
        (vuse_eq): New function, moved from tree-ssa-dom.c
        (build_and_record_new_cond): Likewise.
        (record_conditions): Likewise.  Accept vector of conditions rather
        than edge_equivalence structure for first argument.
        for the first argument.
        (avail_exprs_stack::lookup_avail_expr): New member function, moved
        from tree-ssa-dom.c.
        (avail_exprs_stack::record_cond): Likewise.
        * tree-ssa-scopedtables.h (struct cond_equivalence): Moved here
        from tree-ssa-dom.c.
        (avail_exprs_stack): Add new member functions lookup_avail_expr
        and record_cond.
        (record_conditions): Declare.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-dom.c
    trunk/gcc/tree-ssa-scopedtables.c
    trunk/gcc/tree-ssa-scopedtables.h

--- Comment #19 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Thu Mar 16 03:19:46 2017
New Revision: 246187

URL: https://gcc.gnu.org/viewcvs?rev=246187&root=gcc&view=rev
Log:
        PR tree-optimization/71437
        * tree-ssa-dom.c (derive_equivalences_from_bit_ior): New function.
        (record_temporary_equivalences): Use it.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/tree-ssa-dom.c