[Bug tree-optimization/53355] Autovectorization of a simple loop could be improved.

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53355

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-05-15 13:18:42 UTC ---
Author: rguenth
Date: Tue May 15 13:18:32 2012
New Revision: 187535

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=187535
Log:
2012-05-15  Richard Guenther  <rguenther@suse.de>

    PR tree-optimization/53355
    * tree-vrp.c (extract_range_from_binary_expr_1): Handle LSHIFT_EXPRs
    by constants.

    * gcc.dg/tree-ssa/vrp67.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/vrp67.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-vrp.c