[jdk18] RFR: 8278508: Enable X86 maskAll instruction pattern for 32 bit JVM. [v2]

[Sandhya Viswanathan]

On Tue, 21 Dec 2021 18:13:44 GMT, Quan Anh Mai <duke at openjdk.java.net> wrote:

>> dst both written and read is not the criteria for TEMP dst effect. Only if the src is used after dest is written in the encoding for instruct, TEMP dst is needed.
>
> Hi, do we need `TEMP dst` if some `tmp` is used after `dst` is written, as without it `tmp` and `dst` are implied to have non-overlapping lifetime and can lead to conflict. This is a pure question unrelated to the PR. Thank you very much.

Hi @merykitty, yes we would need TEMP dst in that case as well.

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PR: https://git.openjdk.java.net/jdk18/pull/24