Comment 10 for bug 809761

It's caused by r161764:

Author: sandra
Date: Sat Jul 3 01:00:37 2010
New Revision: 161764

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=161764
Log:
2010-07-02 Daniel Jacobowitz <email address hidden>
     Julian Brown <email address hidden>
     Sandra Loosemore <email address hidden>

 gcc/
 * config/arm/arm.c (arm_canonicalize_comparison): Canonicalize DImode
 comparisons. Adjust to take both operands.
 (arm_select_cc_mode): Handle DImode comparisons.
 (arm_gen_compare_reg): Generate a scratch register for DImode
 comparisons which require one. Use xor for Thumb equality checks.
 (arm_const_double_by_immediates): New.
 (arm_print_operand): Allow 'Q' and 'R' for constants.
 (get_arm_condition_code): Handle new CC_CZmode and CC_NCVmode.
        ...