patch to fix PR57960

[Vladimir Makarov]

The following patch fixes

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57960

The patch was successfully bootstrapped and tested on s390 and x86/x86-64.

Committed as rev. 201243.

2013-07-25  Vladimir Makarov  <vmakarov@redhat.com>

        PR rtl-optimization/57960
        * lra-constraints.c (process_alt_operands): Use the right mode
        when checking strict_low.

2013-07-25  Vladimir Makarov  <vmakarov@redhat.com>

        PR rtl-optimization/57960
        * gcc.target/s390/pr57960.c: New.

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