[Bug tree-optimization/71563] [6/7 Regression] Regression in GCC-7.0.0's optimizer.

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71563

--- Comment #10 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Jan  4 09:07:33 2017
New Revision: 244050

URL: https://gcc.gnu.org/viewcvs?rev=244050&root=gcc&view=rev
Log:
        PR tree-optimization/71563
        * match.pd: Simplify X << Y into X if Y is known to be 0 or
        out of range value - has low bits known to be zero.

        * gcc.dg/tree-ssa/pr71563.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/tree-ssa/pr71563.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog