Use combined_fn in tree-vrp.c

[Jeff Law]

On 11/07/2015 05:46 AM, Richard Sandiford wrote:
> Another patch to extend uses of built_in_function to combined_fn, this time
> in tree-vrp.c.
>
> Tested on x86_64-linux-gnu, aarch64-linux-gnu and arm-linux-gnueabi.
> OK to install?
>
> Thanks,
> Richard
>
>
> gcc/
> 	* tree-vrp.c: Include case-cfn-macros.h.
> 	(extract_range_basic): Switch on combined_fn rather than handling
> 	built-in functions and internal functions separately.
OK.
jeff