Ping (https://gcc.gnu.org/ml/gcc-patches/2015-01/msg01436.html).

These are required for float16 patches posted at 
https://gcc.gnu.org/ml/gcc-patches/2015-04/msg01332.html

Bootstrapped + check-gcc on arm-none-linux-gnueabihf.

Alan Lawrence wrote:
> This parallels the present form of __builtin_aarch64_im_lane_boundsi, and allows 
> to check lane indices for intrinsics that can otherwise be written in terms of 
> GCC vector extensions.
> 
> The new builtin is not used in this patch but is used in my series of float16_t 
> intrinsics (https://gcc.gnu.org/ml/gcc-patches/2015-01/msg01434.html), and at 
> some point in the future we should rewrite existing intrinsics (for other types) 
> to this form too, but I'm leaving that for a later patch series :).
> 
> Cross-tested check-gcc on arm-none-eabi
> Bootstrapped on arm-none-linux-gnueabihf cortex-a15
> 
> gcc/ChangeLog:
> 
>      * config/arm/arm-builtins.c (enum arm_builtins):
>      Add ARM_BUILTIN_NEON_BASE and ARM_BUILTIN_NEON_LANE_CHECK.
>      (ARM_BUILTIN_NEON_BASE): Rename macro to....
>      (ARM_BUILTIN_NEON_PATTERN_START): ...this.
>      (arm_init_neon_builtins): Register __builtin_arm_lane_check.
>      (arm_expand_neon_builtin): Handle ARM_BUILTIN_NEON_LANE_CHECK.