RFR: 8342393: Promote commutative vector IR node sharing [v19]

[Jatin Bhateja]

On Tue, 28 Jan 2025 09:58:55 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Adding missed feature check
>
> test/hotspot/jtreg/compiler/vectorapi/VectorCommutativeOperSharingTest.java line 117:
> 
>> 115:     @IR(counts = {IRNode.XOR_VI, IRNode.VECTOR_SIZE_ANY, " 0 ",
>> 116:                   IRNode.OR_VI, IRNode.VECTOR_SIZE_ANY, " 1 ",
>> 117:                   IRNode.AND_VI, IRNode.VECTOR_SIZE_ANY, " 1 "})
> 
> And this is not going to fail on any architecture? What about architectures other than x64 and aarch64? Do they all support the vector instructions?
> 
> I'd rather not that this fails on their machines and then they have to fix it and we have to review their fix again ;)

Hi @eme64 ,
Attached script shows me that the greatest common divisor of targets supporting IR nodes in this test is x86 :-)
  
[get_c2_IR_supported_targets.txt](https://github.com/user-attachments/files/18572758/get_c2_IR_supported_targets.txt)

![image](https://github.com/user-attachments/assets/daedb8aa-23c5-4c67-b7d3-82859155b88d)

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/22863#discussion_r1932023187