RFR: 8303804: Fix some errors of If-VectorTest and CMove-VectorTest [v2]

[Wang Haomin]

On Thu, 9 Mar 2023 04:34:38 GMT, Quan Anh Mai <qamai at openjdk.org> wrote:

>> For example, `strncmp("MachCall", "MachCallStaticJavaNode", strlen("MachCall"))` , it just compare first 8 characters, the result of this `strncmp` is 0. This is the expected result, I don't understand why `strlen` +1.
>
> @haominw Ah I understand, is this behaviour similarly expected for `MachIf`, or we want the node to exactly match here? Thanks.

Just want to match MachIfNode. Because the output of `inst->mach_base_class(_globalNames)` is only `MachIfNode`, no other `MachIf`, so I just match `MachIf`.

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PR: https://git.openjdk.org/jdk/pull/12917