RFR: C1 fixes to matrix barriers

[Aleksey Shipilev]

On 03/24/2017 10:21 AM, Roman Kennke wrote:
> Am 24.03.2017 um 09:55 schrieb Andrew Haley:
>> On 24/03/17 08:29, Roman Kennke wrote:
>>> Yeah, but x86 can move an immediate instead, no need to take a register
>>> there.
>>> AArch64's const2mem() would only move a zero.
>> And this is worth splattering #ifdefs over shared code?  And there
>> is a speed gain?  In C1?
> Hmm, right. No.
> 
> http://cr.openjdk.java.net/~rkennke/c1matrixbarrier/webrev.01/
> <http://cr.openjdk.java.net/%7Erkennke/c1matrixbarrier/webrev.01/>
> 
> Better?

Looks good.

-Aleksey