[PATCH, AArch64] Support SBC in the backend

[Marcus Shawcroft]

On 14/03/13 15:52, Ian Bolton wrote:
> We couldn't generate SBC for AArch64 ... until now!
>
> This really patch includes the main pattern, a zero_extend form
> of it and a test.
>
> Full regression testing for Linux and bare-metal passed.
>
> OK for trunk stage-1?
>
> Thanks,
> Ian
>
>
> 2013-03-14  Ian Bolton  <ian.bolton@arm.com>
>
> gcc/
> 	* config/aarch64/aarch64.md (*sub<mode>3_carryin): New pattern.
> 	(*subsi3_carryin_uxtw): Likewise.
>
> testsuite/
> 	* gcc.target/aarch64/sbc.c: New test.
>


OK for stage-1.

/Marcus