RFR: 8278036: Saving rscratch1 is optional in MacroAssembler::verify_heapbase

[Paul Hohensee]

On Thu, 13 Jan 2022 17:44:57 GMT, Yi-Fan Tsai <duke at openjdk.java.net> wrote:

> 8278036: Saving rscratch1 is optional in MacroAssembler::verify_heapbase

Hi, Coleen. This patch might not make much of a performance difference, but every little bit helps a debug JVM go a bit faster so as to maybe detect concurrency issues that would otherwise be masked. Plus, it's a starter bug for Yi-Fan to start to understand the macro assembler.

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PR: https://git.openjdk.java.net/jdk/pull/7067