[Bug tree-optimization/67830] [6 Regression] wrong code at -O1 and above on x86_64-linux-gnu

[law at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67830

--- Comment #6 from Jeffrey A. Law <law at gcc dot gnu.org> ---
Author: law
Date: Fri Oct 23 19:16:53 2015
New Revision: 229267

URL: https://gcc.gnu.org/viewcvs?rev=229267&root=gcc&view=rev
Log:
[RFA] Fix pr67830, another type narrowing problem

        PR tree-optimization/67830
        * match.pd ((bit_and (plus/minus (convert @0) (convert @1)) mask)):
        Explicitly verify the mask has no bits outside the type of
        the innermost operands.

        PR tree-optimization/67830
        * gcc.dg/pr67830.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr67830.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/match.pd
    trunk/gcc/testsuite/ChangeLog