PR target/3177
        * config/ia64/ia64.h (CUMULATIVE_ARGS): Add int_regs.
        (INIT_CUMULATIVE_ARGS, INIT_CUMULATIVE_INCOMING_ARGS): Update.
        * config/ia64/ia64.c (ia64_function_arg_advance): Set int_regs.
        (ia64_expand_prologue): Look at int_regs, not words, for number
        of incomming int regs.

From-SVN: r51180