[ping] JDK 10 RFR(S): 8173465: Introduce NearLabel for branches known to be short.

[Lindenmaier, Goetz]

Could someone please have a look?

Thanks,
  Goetz.

> -----Original Message-----
> From: Lindenmaier, Goetz
> Sent: Montag, 30. Januar 2017 12:57
> To: 'hotspot-compiler-dev at openjdk.java.net' <hotspot-compiler-
> dev at openjdk.java.net>
> Subject: JDK 10 RFR(S): 8173465: Introduce NearLabel for branches known to
> be short.
> 
> Hi
> 
> please review this small optimization of Labels.
> This so far targets s390, but could be used on other platforms as well.
> I please need a sponsor.
> http://cr.openjdk.java.net/~goetz/wr17/8173465-
> NearLbl/webrev.01/index.html
> 
> Some branches issued to assembly code are obviously of short distance. Due
> to separation into shared and platform code this not always is known when
> the branch instruction is selected.
> NearLabels indicate that a branch with short reach can be used.
> 
> Best regards,
>   Goetz