RFR: 8248188: Add IntrinsicCandidate and API for Base64 decoding [v4]

[Paul Sandoz]

On Thu, 15 Oct 2020 17:58:29 GMT, CoreyAshford <github.com+51754783+CoreyAshford at openjdk.org> wrote:

>> Please update
>> [compiler/graalunit/HotspotTest.java](https://github.com/openjdk/jdk/blob/master/test/hotspot/jtreg/compiler/graalunit/HotspotTest.java),
>> and add the intrinsic signature.
>
>> Please update
>> [compiler/graalunit/HotspotTest.java](https://github.com/openjdk/jdk/blob/master/test/hotspot/jtreg/compiler/graalunit/HotspotTest.java),
>> and add the intrinsic signature.
> 
> It looks like that is auto-generated, but I will figure out what to modify so that the signature is added.

@CoreyAshford apologies i pointed to the "umbrella" test that runs Graal unit tests, the actual test is
[CheckGraalIntrinsics](https://github.com/openjdk/jdk/blob/master/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.hotspot.test/src/org/graalvm/compiler/hotspot/test/CheckGraalIntrinsics.java)

See this PR for an example: https://github.com/openjdk/jdk/pull/762

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

PR: https://git.openjdk.java.net/jdk/pull/293