RFR(S): 8189268: [MVT] C2 fails with SIGSEGV in PhaseMacroExpand::expand_mh_intrinsic_return()

[Tobias Hartmann]

Hi,

please review the following patch:
https://bugs.openjdk.java.net/browse/JDK-8189268
http://cr.openjdk.java.net/~thartmann/8189268/webrev.00/

C2 crashes with -XX:-UseTLAB because 'top_adr' is uninitialized and passed to the StorePNode constructor.

Thanks,
Tobias