RFR: 8254966: Remove unused code from Matcher

Tue Oct 20 07:19:30 UTC 2020

On Sun, 18 Oct 2020 12:11:41 GMT, Claes Redestad <redestad at openjdk.org> wrote:

> These are unused:
> 
> interpreter_method_reg*
> compiler_method_reg*
> pd_implicit_null_fixup (only existed to workaround some Win95 issues)
> 
> Quite some code in the .ad files shook loose when removing these, so I will need some help verifying that the s390 and
> ppc changes are fine.

Not a full review.

Tested on s390, ppc64. Builds fine, tests show no errors. Changes looks good to me.

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PR: https://git.openjdk.java.net/jdk/pull/723