[jdk16] RFR: 8258558: Revert changes for JDK-8252505 and related issues

[Vladimir Kozlov]

On Tue, 5 Jan 2021 18:54:45 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> As the result of retroactive CSR discussion in JDK-8257827, I have decided to revert the original push and all the follow-up changes from JDK 16, in order to reconsider them for JDK 17.
> 
> This PR reverts the following changes -- the reversal is clean and done without manual intervention:
>   JDK-8258111: Problemlist compiler/blackhole tests for -Xcomp until JDK-8258101 is fixed
>   JDK-8257848: -XX:CompileCommand=blackhole,* should be diagnostic
>   JDK-8257805: Add compiler/blackhole tests to tier1
>   JDK-8257803: Add -Xbatch to compiler/blackhole tests
>   JDK-8252505: C1/C2 compiler support for blackholes
> 
> While line count is great, the overwhelming majority of changes are test removals.
> 
> Additional testing:
>  - [x] Linux x86_64 `tier1`

Good.

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

Marked as reviewed by kvn (Reviewer).

PR: https://git.openjdk.java.net/jdk16/pull/86