RFR: JDK-8213199: GC abstraction for Assembler::needs_explicit_null_check()

[Kim Barrett]

> On Oct 31, 2018, at 6:14 PM, Roman Kennke <rkennke at redhat.com> wrote:
> 
> Hi Erik,
> 
> right. Fixed this, and what what Kim mentioned plus a missing include:
> 
> Incremental:
> http://cr.openjdk.java.net/~rkennke/JDK-8213199/webrev.01.diff/
> Full:
> http://cr.openjdk.java.net/~rkennke/JDK-8213199/webrev.01/
> 
> Ok now?

Looks good.