patch to fix PR55396

[Vladimir Makarov]

The following patch fixes

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55396

The patch was successfully tested and bootstrapped on x886/x86-64.

Committed as rev. 193678.

2012-11-20  Vladimir Makarov  <vmakarov@redhat.com>

         PR rtl-optimization/55396
         * lra-constraints.c (get_reload_reg): Change class if it is
         different from reg class.



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