RFR(XS): 8058092 Test vm/mlvm/meth/stress/compiler/deoptimize. Assert in src/share/vm/classfile/systemDictionary.cpp: MH intrinsic invariant

[Igor Veresov]

We need to throw an exception if we’re unable to compile an MH intrinsic.
I also hardened the assert to use the value of Arguments::_mode to check if we’re running in the interpreter, because UseCompiler can change it’s value dynamically.

JBS: https://bugs.openjdk.java.net/browse/JDK-8058092
Webrev: http://cr.openjdk.java.net/~iveresov/8058092/webrev.00/

I also filed JDK-8058176 to harden the tests to tolerate out-of-codecache problems.

Thanks!
igor