[Bug tree-optimization/80520] [7/8/9 Regression] Performance regression from missing if-conversion

[law at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80520

--- Comment #12 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Tue Dec 11 04:56:54 2018
New Revision: 266971

URL: https://gcc.gnu.org/viewcvs?rev=266971&root=gcc&view=rev
Log:
        PR tree-optimization/80520
        * gimple-ssa-split-paths.c (is_feasible_trace): Recognize half
        diamonds that are likely if convertable.

        * gcc.dg/tree-ssa/split-path-5.c: Update expected output.
        * gcc.dg/tree-ssa/split-path-11.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/split-path-11.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-ssa-split-paths.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gcc.dg/tree-ssa/split-path-5.c