[aarch64-port-dev ] [16]RFR(S):8249092:InternalError: a fault occurred in a recent unsafe memory access operation in compiled Java code

[Wang Zhuo(Zhuoren)]

Hi, this is a fix for a test case.
In -Xcomp mode, compiler/unsafe/TestUnsafeUnalignedSwap.java will fail because the catch misses the error due to async exception.
This patch uses a loop to make sure the error can be caught. Also -Xcomp is added in test. 
BUG: https://bugs.openjdk.java.net/browse/JDK-8249092
Patch: http://cr.openjdk.java.net/~wzhuo/8249092/webrev.00/


Regards,
Zhuoren