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* config/mmix/mmix.h: Improve comments. (CPP_SPEC, CPP_PREDEFINES): Don't define. (TARGET_CPU_CPP_BUILTINS): Define. (CANONICALIZE_COMPARISON): Don't define, replace with comment. (PREDICATE_CODES) <"mmix_reg_or_8bit_or_256_operand">: Remove unused predicate. * config/mmix/mmix.c (MMIX_OUTPUT_REGNO): Add cast to avoid compiler warning. (mmix_constant_address_p): Remove another redundant test before case. (mmix_canonicalize_comparison): Remove unused function. (mmix_print_operand_address): Don't test and adjust for operand in non-canonical format. (mmix_reg_or_8bit_or_256_operand): Remove unused predicate. (mmix_gen_compare_reg): Don't use CANONICALIZE_COMPARISON. From-SVN: r54474
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