[GR-36894] WIP: DynamicObject nodes #12238
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* Faster in interpreter and better footprint than DynamicObjectLibrary,
because Truffle libraries do not support host inlining and have footprint overhead.
* Use a more optimized guard for set() with 2 Shapes.
* Only inline cache 1 Shape for GetShapeFlagsNode.
* An extra read seems better than more control flow.
* Migrate SL to DynamicObject nodes.
* Check the old Shape Assumption in the @Specialization.assumptions
* This avoids an extra call to putGeneric() for host inlining,
and ensures the specialization gets removed if the oldShape becomes invalid.
* Use putFlags instead of cachedPutFlags to fold during host inlining.
* This saves around 6 node cost for DynamicObject.PutFixedKeyNode.
* It is only observable if multiple PutNode#put*() methods are used (= different put flags) in the native image.
* Remove calls to Location#isFinal(), it's always false.
* Link the replacement nodes in DynamicObjectLibrary.
* Remove {PutNode,PutFixedKeyNode}#putInt, it boxes anyway so there is no value
* Also other variants like putDouble are missing.
* Use @fallback to avoid potential issues with a Shape becoming invalid concurrently.
* Remove KeyEqualsNode and just compare keys by identity
* Reduces subTreeCost of SLReadPropertyNode.readSLObject from 307 to 245.
* Use the same Shape check both in guards and specialization body.
* Merge inline caches of PutNode and InlinedConstKey into one.
* Merge inline caches of {PutNode,PutFixedKeyNode} and PutCache into one.
* Handle invalid shapes without removing all cached specializations
* Removing the specialization instance itself is fine, the problem is
removing all cache specialization due to the `replaces` on doUncached.
* Add a property read micro benchmark for SL
* Port documentation from DynamicObjectLibrary to DynamicObject nodes
* Update docs, 16 bit are actually allowed for user Shape flags
* Migrate DynamicObjectBenchmark and DynamicObjectPartialEvaluationTest
* [EXPERIMENT] Manually inline ExtLocations.ObjectArrayLocation in GetNode
* [EXPERIMENT] Manually inline ExtLocations.IntArrayLocation in GetNode
* [EXPERIMENT] Manually inline ExtLocations.ObjectArrayLocation in PutNode
* Cache the Location instead of Property in DynamicObject nodes to avoid extra indirection in interpreter
* Add interpreter benchmarks for DynamicObject.{GetNode,PutNode}
* It is enough to check the new Shape Assumption in PutNode
* If the old Shape Assumption is invalidated, it will also invalidate the new Shape Assumption.
* Fix bug where doCached was used with an old obsolete shape
* [GR-69326] Avoid duplicate property lookup in DynamicObject.PutNode
* Extract reusePropertyLookup() and fix RemoveKeyNode
* Run all DynamicObject tests with the new DynamicObject nodes too.
Co-authored-by: Andreas Woess <[email protected]>
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