[Bug tree-optimization/79389] [7 Regression] 30% performance regression in SciMark2 MonteCarlo

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79389

--- Comment #19 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Fri Feb 24 08:04:31 2017
New Revision: 245696

URL: https://gcc.gnu.org/viewcvs?rev=245696&root=gcc&view=rev
Log:
2017-02-24  Richard Biener  <rguent...@suse.de>

        PR tree-optimization/79389
        * gimple-ssa-split-paths.c (is_feasible_trace): Verify more
        properly that a threading opportunity exists.  Detect conditional
        copy/constant propagation opportunities.

        * gcc.dg/tree-ssa/split-path-10.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/split-path-10.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-ssa-split-paths.c
    trunk/gcc/testsuite/ChangeLog