[vectorIntrinsics] RFR: 8264427: StubRoutines::vectorizedMismatch is missing for C1 compiler after JDK-8264321

[Sandhya Viswanathan]

On Wed, 31 Mar 2021 20:15:55 GMT, Sandhya Viswanathan <sviswanathan at openjdk.org> wrote:

>> Hi all,
>> 
>> StubRoutines::vectorizedMismatch [1] is missing for C1 compiler if `#ifdef COMPILER2` is false.
>> 
>> This bug will cause jdk crash while building minimal VM due to the following incorrect code generated by C1.
>> --------------------------------------------------------------------------------
>>   74 rtcall StubRoutines::vectorizedMismatch()
>> --------------------------------------------------------------------------------
>>   0x00007fffee4f1809:   movabs $0x0,%r10                    ;   {runtime_call}
>>   0x00007fffee4f1813:   callq  *%r10                        ;*invokestatic vectorizedMismatch {reexecute=0 rethrow=0 return_oop=0}
>>                                                             ; - jdk.internal.util.ArraysSupport::mismatch at 33 (line 239)
>> 
>> Let's fix it
>> 
>> Thanks.
>> Best regards,
>> Jie
>> 
>> [1] https://github.com/openjdk/panama-vector/blob/vectorIntrinsics/src/hotspot/cpu/x86/stubGenerator_x86_64.cpp#L6969
>
> Marked as reviewed by sviswanathan (Committer).

The changes look good to me.

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PR: https://git.openjdk.java.net/panama-vector/pull/55