RFR: 8076988: reevaluate trivial method policy

[Eric Caspole]

Hi everyone,
Could I get reviews or comments for a fix/simplification of the trivial 
method policy. I have an internal benchmark where a very hot "trivial" 
method gets compiled at level 1 and it leads to a ~9% regression 
compared to getting compiled with C2 level 4. Others have expressed 
thoughts that this policy might now not as useful as originally 
intended. I have run performance testing of throughput and startup time 
with no noticeable regressions.

This webrev passed regular tier1 and tier 2 testing.
Thanks,
Eric


JBS:
https://bugs.openjdk.java.net/browse/JDK-8076988

Webrev:
http://cr.openjdk.java.net/~ecaspole/JDK-8076988/01/webrev/