RFR(S): 8159620: -XX:-UseOnStackReplacement does not work together with -XX:+TieredCompilation on ppc64 and sparc

[Volker Simonis]

Hi,

can I please have a review and sponsor for the following small change
which fixes -XX:-UseOnStackReplacement to work together with
-XX:+TieredCompilation:

http://cr.openjdk.java.net/~simonis/webrevs/2016/8159620/
https://bugs.openjdk.java.net/browse/JDK-8159620

This is a long standing bug on SPARC and as the ppc64 template
interpreter was initially forked from the SPARC implementation, it
also manifests there. The problem is that in the case of tiered
compilation the interpreter unconditionally calls
InterpreterRuntime::frequency_counter_overflow if the back edge
counter overflows. This triggers an OSR compilation, even if OSR was
switched off with -XX:-UseOnStackReplacement.

The fix is simple - just don't call
InterpreterRuntime::frequency_counter_overflow if OSR has been
switched off.

Thank you and best regards,
Volker