RFR: 8215547: ZGC: Fix incorrect match rule for loadBarrierWeakSlowRegNoVec

[Nils Eliasson]

Looks good!

// Nils

On 2018-12-19 12:51, Per Liden wrote:
> Nils, Erik and I discussed this further off-line and found a few other 
> inconsistencies and potential bugs. Here's an updated webrev 
> reflecting that:
>
> http://cr.openjdk.java.net/~pliden/8215547/webrev.1
>
> This patch has passed tier1-6 and 10+ iterations in gc-test-suite.
>
> /Per
>
> On 12/18/18 10:45 AM, Per Liden wrote:
>> The AD matching for loadBarrierWeakSlowRegNoVec is incorrect. It 
>> should match against a LoadBarrierWeakSlowReg, not LoadBarrierSlowReg.
>>
>> Also the format lines for loadBarrier*SlowRegXmmAndYmm are missing 
>> the "AndYmm" part.
>>
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8215547
>> Webrev: http://cr.openjdk.java.net/~pliden/8215547/webrev.0
>>
>> /Per