RFR: 8306625 - Missing instructions on IR-based test framework ALLOC Regex

[Tobias Hartmann]

On Tue, 25 Apr 2023 01:18:39 GMT, Cesar Soares Lucas <cslucas at openjdk.org> wrote:

> On AArch64 with -XX:-UseTLAB, C2 can add an `add`, `mulw` or `addw` around the method call to allocate an object/array. When this happens the current Regex of the IR-based test framework will NOT recognize the instruction sequence as an allocation and the result will be a false-negative test results.
> 
> This PR is to adjust the four Regex to account for those possible instructions.

Should we add a test that triggers this?

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PR Review: https://git.openjdk.org/jdk/pull/13631#pullrequestreview-1399207446