[PING][PATCH][AARCH64]Fix PR63424 by adding <su><maxmin>v2di3 pattern

[Renlin Li <renlin.li@arm.com>]

Hi all,

Dose anybody have time to review this?

Kind regards,
Renlin Li

On 31/10/14 14:51, Renlin Li wrote:
> Hi all,
>
> This is a patch which will fix PR63424.
>
> It implements signed/unsigned max/min pattern for V2DI mode in terms 
> of vcondv2div2di pattern.
>
> In this particular case, VEC_COND_EXPR (V2DImode) is generated as 
> aarch64 target supports it (vcond<mode><mode> for VALL). The 
> VEC_COND_EXPR will further folded into MIN_EXPR/MAX_EXPR in dom pass 
> unconditionally. Later in expand pass, the compiler tries to expand 
> min_expr using standard RTL operation. It fails, because aarch64 
> target don't have minv2di3 pattern implemented. It then tries to 
> generate conditional move and compare&branch sequence, all fails. At 
> last it falls into libfunc call, no luck either. An ICE to complain 
> about this.
>
> aarch64-none-elf toolchain has been tested on the model, no regressions.
>
> Is it Okay for trunk?
>
> gcc/ChangeLog:
>
> 2014-10-31  Renlin Li  <Renlin.Li@arm.com>
>     PR target/63424
>     * config/aarch64/aarch64-simd.md (<su><maxmin>v2di3): New.
>
> gcc/testsuite/ChangeLog:
>
> 2014-10-31  Renlin Li  <Renlin.Li@arm.com>
>     PR target/63424
>     * gcc.target/aarch64/pr63424.c: New.