[Bug tree-optimization/59643] Predictive commoning unnecessarily punts on scimark2 SOR

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59643

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Tue Jan  7 07:49:10 2014
New Revision: 206384

URL: http://gcc.gnu.org/viewcvs?rev=206384&root=gcc&view=rev
Log:
    PR tree-optimization/59643
    * tree-predcom.c (split_data_refs_to_components): If one dr is
    read and one write, determine_offset fails and the write isn't
    in the bad component, just put the read into the bad component.

    * gcc.dg/pr59643.c: New test.
    * gcc.c-torture/execute/pr59643.c: New test.

Added:
    trunk/gcc/testsuite/gcc.c-torture/execute/pr59643.c
    trunk/gcc/testsuite/gcc.dg/pr59643.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-predcom.c