[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 #22 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Fri Mar 17 15:01:56 2017
New Revision: 246225

URL: https://gcc.gnu.org/viewcvs?rev=246225&root=gcc&view=rev
Log:
        PR tree-optimization/71437
        * tree-vrp.c (simplify_stmt_for_jump_threading): Lookup the
        conditional in the hash table first.
        (vrp_dom_walker::before_dom_children): Extract condition from
        ASSERT_EXPR.  Record condition, its inverion and any implied
        conditions as well.

        PR tree-optimization/71437
        * gcc.dg/tree-ssa/pr71437.c: New test.
        * gcc.dg/tree-ssa/20040305-1.c: Test earlier dump.
        * gcc.dg/tree-ssa/ssa-dom-thread-4.c: Adjust for jump threads
        now caught by VRP, but which were previously caught by DOM.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr71437.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/tree-ssa/20040305-1.c
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ssa-dom-thread-4.c
    trunk/gcc/tree-vrp.c