[Bug target/16458] PowerPC - redundant compare

["bergner at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16458

--- Comment #10 from Peter Bergner <bergner at gcc dot gnu.org> 2012-06-02 20:29:04 UTC ---
Author: bergner
Date: Sat Jun  2 20:28:52 2012
New Revision: 188141

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=188141
Log:
    Backport from mainline
    2012-04-11  Peter Bergner  <bergner@vnet.ibm.com>
            Michael Matz  <matz@suse.de>

    PR target/16458
    * rtlanal.c (unsigned_reg_p): New function.
    Update copyright notice dates.
    * rtl.h (unsigned_reg_p): Prototype it.
    Update copyright notice dates.
    * config/rs6000/rs6000.c (rs6000_generate_compare): Use it.
    Update comment.
    * expr.c (expand_expr_real_1): Set register attributes.
    * stmt.c (expand_case): Likewise.

Added:
    branches/ibm/gcc-4_6-branch/gcc/testsuite/gcc.target/powerpc/pr16458-1.c
    branches/ibm/gcc-4_6-branch/gcc/testsuite/gcc.target/powerpc/pr16458-2.c
    branches/ibm/gcc-4_6-branch/gcc/testsuite/gcc.target/powerpc/pr16458-3.c
    branches/ibm/gcc-4_6-branch/gcc/testsuite/gcc.target/powerpc/pr16458-4.c
Modified:
    branches/ibm/gcc-4_6-branch/gcc/ChangeLog.ibm
    branches/ibm/gcc-4_6-branch/gcc/REVISION
    branches/ibm/gcc-4_6-branch/gcc/config/rs6000/rs6000.c
    branches/ibm/gcc-4_6-branch/gcc/expr.c
    branches/ibm/gcc-4_6-branch/gcc/rtl.h
    branches/ibm/gcc-4_6-branch/gcc/rtlanal.c
    branches/ibm/gcc-4_6-branch/gcc/stmt.c