[9] RFR(XS): 8180511: Null pointer dereference in Matcher::ReduceInst()

[Tobias Hartmann]

Hi,

please review the following patch:
https://bugs.openjdk.java.net/browse/JDK-8180511
http://cr.openjdk.java.net/~thartmann/8180511/webrev.00/

Fixed a missing null check on the return value of MachNodeGenerator() found by Parfait.

Thanks,
Tobias