[Bug tree-optimization/78348] [7 REGRESSION] 15% performance drop for coremark-pro/nnet-test after r242038

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78348

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Nov 16 08:42:20 2016
New Revision: 242470

URL: https://gcc.gnu.org/viewcvs?rev=242470&root=gcc&view=rev
Log:
2016-11-16  Richard Biener  <rguenther@suse.de>

        PR tree-optimization/78348
        * tree-loop-distribution.c (enum partition_kind): Add PKIND_MEMMOVE.
        (generate_memcpy_builtin): Honor PKIND_MEMCPY on the partition.
        (classify_partition): Set PKIND_MEMCPY if dependence analysis
        revealed no dependency, PKIND_MEMMOVE otherwise.

        * gcc.dg/tree-ssa/ldist-24.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/ldist-24.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-loop-distribution.c