[14]: RFR(XXS): 8236944:The legVecZ operand should be limited to zmm0-zmm15 registers

[Viswanathan, Sandhya]

Thanks a lot Vladimir! Can I push this onto JDK 14 branch?

Best Regards,
Sandhya


-----Original Message-----
From: Vladimir Ivanov <vladimir.x.ivanov at oracle.com> 
Sent: Friday, January 10, 2020 3:39 PM
To: Viswanathan, Sandhya <sandhya.viswanathan at intel.com>; hotspot compiler <hotspot-compiler-dev at openjdk.java.net>
Subject: Re: [14]: RFR(XXS): 8236944:The legVecZ operand should be limited to zmm0-zmm15 registers

FYI test results are clean (hs-precheckin-comp,hs-tier1,hs-tier2).

Best regards,
Vladimir Ivanov

On 11.01.2020 00:50, Vladimir Ivanov wrote:
> Looks good.
> 
> Best regards,
> Vladimir Ivanov
> 
> On 10.01.2020 22:35, Viswanathan, Sandhya wrote:
>> JBS: https://bugs.openjdk.java.net/browse/JDK-8236944
>>
>> Webrev: http://cr.openjdk.java.net/~sviswanathan/8236944/webrev.00/
>>
>> Currently legVecZ operand is defined as follows:
>>
>> operand legVecZ() %{
>>
>>    constraint(ALLOC_IN_RC(vectorz_reg_vl));
>>
>>    match(VecZ);
>>
>>    format %{ %}
>>
>>    interface(REG_INTER);
>>
>> %}
>>
>> This allows legVecZ to be zmm0-zmm31 on platforms supporting AVX 512 vl.
>>
>> The legVecZ should instead be defined as:
>>
>> operand legVecZ() %{
>>
>>    constraint(ALLOC_IN_RC(vectorz_reg_legacy));
>>
>>    match(VecZ);
>>
>>    format %{ %}
>>
>>    interface(REG_INTER);
>>
>> %}
>>
>> Please consider this for JDK 14.
>>
>> Best Regards,
>>
>> Sandhya
>>