[9] RFR (S): 8075263: MHI::checkCustomized isn't eliminated for inlined MethodHandles (original) (raw)

Vladimir Ivanov vladimir.x.ivanov at oracle.com
Mon Mar 16 18:47:44 UTC 2015

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http://cr.openjdk.java.net/~vlivanov/8075263/webrev.00/hotspot http://cr.openjdk.java.net/~vlivanov/8075263/webrev.00/jdk https://bugs.openjdk.java.net/browse/JDK-8075263

When MethodHandle is a compile-time constant and it is inlined in MethodHandle.invoke/invokeExact there's no need in MHI::checkCustomized call. It should be eliminated since it adds some overhead on fast path.

The fix is to add new intrinsic (MHI::isCompileConstant) and use it to prune MHI::checkCustomized logic when MethodHandle is a constant.

Testing: java/lang/invoke, nashorn, octane

Best regards, Vladimir Ivanov

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