PR opt/2962 has been fixed

[Roger Sayle]

I believe that PR optimization/2962 has been fixed on mainline by the
recent patch http://gcc.gnu.org/ml/gcc-patches/2002-04/msg01006.html

2002-04-17  Roger Sayle  <roger@eyesopen.com>
            Jakub Jelinek  <jakub@redhat.com>

    * fold-const.c (fold) [NOP_EXPR]: Convert (T)(x&c) into ((T)x&(T)c)
    for integer constant c (if x has unsigned type or sign bit is not
    set in c).  This folds the zero/sign extension into the bit-wise
    and operation.

We now no longer generate the unnecessary "cwtl" instruction for the
test case in the PR.  [Unfortunately with -Os, there is no net space
saving for this example function as mainline also decides to use a
longer but faster load instruction].

Ok to close this PR?  I've recently got GNATS access, but I'm not sure
if I'm allowed to edit PRs without the approval of a MAINTAINER.

Roger
--
Roger Sayle,                         E-mail: roger@eyesopen.com
OpenEye Scientific Software,         WWW: http://www.eyesopen.com/
Suite 1107, 3600 Cerrillos Road,     Tel: (+1) 505-473-7385
Santa Fe, New Mexico, 87507.         Fax: (+1) 505-473-0833