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Type: Bug
Resolution: Fixed
Priority: P4
Fix Version/s: 9
Affects Version/s: None
Component/s: hotspot
Labels:
- sun.misc.Unsafe

Subcomponent:
compiler
Resolved In Build:
b40

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8083470	emb-9	Vladimir Kozlov	P4	Resolved	Fixed	master

When a java cast is performed and the cast is optimized away in a compiled method redundant null checks (with deoptimization) can still remain.

This is has been observed with method handles that access fields and elements of arrays and also with the experimental VarHandle work (see http://cr.openjdk.java.net/~psandoz/varhandles/VarHandle-0.1.md).

backported by

JDK-8083470 Casting can result in redundant null checks in generated code

Resolved

blocks

JDK-8062543 Replace uses of MethodHandleImpl.castReference with Class.cast

Closed

relates to

JDK-8062477 Add speculative type profiling for parameters of Class.cast() and Class.isInstance() methods

Open

JDK-8035809 Improve inlining of Class::cast method

Closed

Assignee:: Vladimir Kozlov

Reporter:: Paul Sandoz

Votes:: 0 Vote for this issue

Watchers:: 5 Start watching this issue

Created:: 2014-08-07 02:17

Updated:: 2015-06-03 16:07

Resolved:: 2014-10-31 20:34

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