RFR: 8075045: AARCH64: Stack banging should use store rather than load

[David Holmes]

On 16/03/2015 9:53 PM, Andrew Haley wrote:
> At present, stack banging uses a load rather than a store instruction.
> We have discovered that on some AArch64 implementations a store
> performs considerably better but on no implementation is it worse.
> Therefore, at least for the time being, all stack bangs should use a store.
>
> http://cr.openjdk.java.net/~aph/8075045/

Reviewed and cleared for direct push.

Thanks,
David

> Andrew.
>