RFR: 8226822: GC interface for C1 runtime calls

[Nils Eliasson]

Looks good,

// Nils

On 2019-07-01 16:51, Roman Kennke wrote:
>   Currently, it is not possible for GC to emit runtime calls in C1
> without touching shared code, because it needs to be known in
> c1_Runtime.hpp/cpp.
>
> This patch adds a little hook to allow the GC to make runtime calls known.
>
> This is a prerequisite for:
> https://bugs.openjdk.java.net/browse/JDK-8226695
>
>
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8226822
> Webrev:
> http://cr.openjdk.java.net/~rkennke/JDK-8226822/webrev/
>
> Can I please get reviews?
>
> Thanks, Roman
>