RFR: 8300113: C2: Single-bit fields with signed type in TypePtr after JDK-8297933

[Aleksey Shipilev]

On Fri, 13 Jan 2023 10:41:06 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> See the description in the bug. Attention @rwestrel.
> The solution is to use `uint` like the rest of C2 and other `:1` fields there.
> 
> Additional testing:
>  - [x] Linux x86_64 fastdebug hotspot:tier1

Thank you!

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PR: https://git.openjdk.org/jdk/pull/11989