Thank you guys,
Updated patch is attached. Test fails wihout and passing with the fix.

ChangeLog entry:
2011-10-20  Kirill Yukhin  <kirill.yukhin@intel.com>

        PR target/50766
        * config/i386/i386.md (bmi_bextr_<mode>): Update register/
        memory operand order.
        (bmi2_bzhi_<mode>3): Ditto.
        (bmi2_pdep_<mode>3): Ditto.
        (bmi2_pext_<mode>3): Ditto.

testsuite/ChangeLog entry:
2011-10-20  Kirill Yukhin  <kirill.yukhin@intel.com>

        PR target/50766
        * gcc.target/i386/pr50766.c: New test.

Could you please have a look?

Thanks, K