[PATCH, rs6000] Fix PR16458, eliminate redudant compares

[Richard Guenther]

On Tue, Apr 10, 2012 at 8:50 PM, David Edelsohn <dje.gcc@gmail.com> wrote:
> On Tue, Apr 10, 2012 at 1:36 PM, Peter Bergner <bergner@vnet.ibm.com> wrote:
>
>> 2012-mm-dd  Peter Bergner  <bergner@vnet.ibm.com>
>>            Michael Matz  <matz@suse.de>
>>
>> gcc/
>>        PR target/16458
>>        * rtlanal.c (unsigned_reg_p): New function.
>>        * rtl.h (unsigned_reg_p): Prototype it.
>>        * 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.
>>
>> gcc/testsuite/
>>        PR target/16458
>>        * gcc.target/powerpc/pr16458-1.c: New test.
>>        * gcc.target/powerpc/pr16458-2.c: Likewise.
>>        * gcc.target/powerpc/pr16458-3.c: Likewise.
>>        * gcc.target/powerpc/pr16458-4.c: Likewise.
>
> The rs6000 and testsuite parts of the patch are okay with me.

The rest is ok as well.

Thanks,
Richard.

> Thanks, David