RFR: 8325467: Support methods with many arguments in C2 [v4]

[Roberto Castañeda Lozano]

On Fri, 23 Aug 2024 11:36:37 GMT, Daniel Lundén <dlunden at openjdk.org> wrote:

> (and as we discussed in-person, you offered to work a bit on 1) yourself).

Yes, here is an extension of the current test set: https://github.com/openjdk/jdk/commit/4fc5282e24a8449107a66f534a794b8e680537f7, feel free to merge into this PR, and of course make any change you find necessary. The patch introduces new tests for extended RegMasks but also for basic RegMask operations that were not covered. I have also added a few tests that cover working with offsets (rollovers, insertions, deletions, find operations, and different combinations of `SUBTRACT_inner`). Finally, it introduces a minimal debug-only extension of RegMask which I found necessary to write the tests. Beware that I have only run the new tests locally (linux-x64), so please check that they work on other platforms.

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

PR Comment: https://git.openjdk.org/jdk/pull/20404#issuecomment-2307234407