RFR: 8313530: VM build without C2 fails after JDK-8312579

Tue Aug 22 13:14:29 UTC 2023

On Tue, 22 Aug 2023 09:04:32 GMT, Gergö Barany <gbarany at openjdk.org> wrote:

> The EnableVectorSupport flag is declared in `opto/c2_globals.hpp`, which is not included if `COMPILER2` is not set. But after my changes for [JDK-8312579](https://bugs.openjdk.org/browse/JDK-8312579) we try to access this flag in some places guarded by `#if COMPILER2_OR_JVMCI`.
> 
> This PR moves some flags from `c2_globals.hpp` to the shared `compiler_globals.hpp`, so that they are accessible even if C2 is disabled but JVMCI is enabled.

Marked as reviewed by dnsimon (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/15384#pullrequestreview-1589412470