RFR: 8225648:[TESTBUG] java/lang/annotation/loaderLeak/Main.java fails with -Xcomp

[Jie Fu]

Hi all,

JBS:    https://bugs.openjdk.java.net/browse/JDK-8225648
Webrev: http://cr.openjdk.java.net/~jiefu/8225648/webrev.00/

The failure was caused by the lost of an OopMap item for the object 
"loader"[1] which was optimized out by JIT with liveness analysis 
optimization.
It seems that this case is only suitable for testing interpreters which 
is not friendly to optimized JITs at all.

Although not every test would work with Xcomp (for various reasons), 
it's beneficial to make more tests suitable for JIT testing.
I just hope tests in tier1 would pass with Xcomp.
The goal seems to be reached if this bug and JDK-8225644[2] could be fixed.

Could you please review it?

Thanks a lot.
Best regards,
Jie

[1] 
http://hg.openjdk.java.net/jdk/jdk/file/ae3dbc712839/test/jdk/java/lang/annotation/loaderLeak/Main.java#l48
[2] https://bugs.openjdk.java.net/browse/JDK-8225644