RFR (S): 8033666: Make sure @ForceInline is everywhere it needs to be in sun.misc and java.lang.invoke
vladimir.x.ivanov at oracle.com
Wed Feb 26 00:16:04 UTC 2014
ValueConversions::castReference was introduced to workaround a problem
with unreliable inlining of Class::cast method. Unfortunately, since
ValueConversions class is located in sun.invoke.util,
@java.lang.invoke.ForceInline annotation isn't visible to it.
A proper fix would be to teach Hotspot to treat Class::cast specifically
and always inline it, but it requires extensive exploration of
performance implications. Filed 8035809  to track that.
As an interim fix, I moved castReference method into
java.lang.invoke.MethodHandleImpl class and added new entry point
ValueConversions::cast which accepts a method handle to a method which
should be used for casting.
Testing: manual (looked through -XX:+PrintInlining output to ensure
MHI::castReference is inlined), jdk/java/lang/invoke, octane.
 8035809: Improve inlining of Class::cast method
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