RFR: 8254104: MethodCounters must exist before nmethod is installed

[Doug Simon]

On Wed, 7 Oct 2020 14:35:24 GMT, Igor Veresov <iveresov at openjdk.org> wrote:

> Ensure that MethodCounters for a particular method exist during the nmethod install (for methods that were never run
> before). Tiered compilation policy depends on the state stored in the counters to function properly.

Marked as reviewed by dnsimon (Committer).

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PR: https://git.openjdk.java.net/jdk/pull/543