RFR(XS) 8024095: Missing brackets in local scheduling code.

[Niclas Adlertz]

Hi all,

This fix should potentially give a speedup since we can now find calls within a block and better move instructions that are not needed before the call.
A review would be much appreciated. 

WEBREV: http://cr.openjdk.java.net/~adlertz/JDK-8024095/webrev00/
JBS: https://jbs.oracle.com/bugs/browse/JDK-8024095

Kind Regards,
Niclas Adlertz