Make more use of in_hard_reg_set_p

[Jeff Law]

On 09/11/2017 11:16 AM, Richard Sandiford wrote:
> An upcoming patch will convert hard_regno_nregs into an inline
> function, which in turn allows hard_regno_nregs to be used as the
> name of a targetm field.  This patch rewrites a use that can use
> in_hard_reg_set_p instead.
> 
> Tested on aarch64-linux-gnu, x86_64-linux-gnu and powerpc64le-linux-gnu.
> Also tested by comparing the testsuite assembly output on at least one
> target per CPU directory.  OK to install?
> 
> Richard
> 
> 
> 2017-09-11  Richard Sandiford  <richard.sandiford@linaro.org>
> 
> gcc/
> 	* ira-costs.c (record_operand_costs): Use in_hard_reg_set_p
> 	instead of hard_regno_nregs.
OK.
jeff