RFR: 8322816: RISC-V: Incorrect guarantee in patch_vtype [v2]

[Kim Barrett]

On Wed, 3 Jan 2024 01:59:00 GMT, Fei Yang <fyang at openjdk.org> wrote:

>> Rather than removing the guarantee, wouldn't it be better to guarantee/assert `vill == 0`?
>> Although looking at uses, that argument is a bool, so it should be `guarantee(!vill, ...)`.
>
> Hi, Yes, that's better. Maybe: `guarantee(!vill, "should be");`

I've changed the guarantee as discussed.  There are further cleanups possible
here, but I'll leave that to the riscv port maintainers.

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PR Review Comment: https://git.openjdk.org/jdk/pull/17215#discussion_r1444109348