This changelog summarizes newly introduced optimizations that may be relevant to other teams.
- (GR-22707) (GR-30838): New, inner loops first, reverse post order and loop frequency calculations for the compiler.
- (GR-29770) Loop safepoint elimination: Not only consider 32bit loops for safepoint removal but also 64bit ones that iterate in 32bit ranges.
- (GR-29341) AVX-512 support: Fix EVEX encoding and feature checks for existing instructions and add AVX-512 alternatives.
- (GR-31162) Do not de-duplicate ValueAnchorNode. As part of this change, there is a new marker interface NodeWithIdentity to mark nodes that have identity.
- (GR-8974) Speculative guard movement: An optimization that tries to move a loop invariant guard
(e.g., an array bounds check) inside a loop to outside of the loop. Disable with
-Dgraal.SpeculativeGuardMovement=false. Included in this change is enhanced output for-Dgraal.ShowConfiguration=verbosein terms of showing the compilation phases of a compiler configuration. - (GR-31031) Add intrinsic for Reference.refersTo and PhantomReference.refersTo.
- (GR-31059) Permit unusually structured locking in Kotlin coroutines.
- (GR-29126) Unify box optimizations in the compiler. Remove
-Dgraal.ReuseOutOfCacheBoxedValues=false. - (GR-28523) Optimize Box nodes: Optimizes box operations by re-using boxed representations
if the value of the boxed primitive is outside of the cache range of the Int/Long/Short/Char caches.
Box node optimization is enabled per default. Disable it with
-Dgraal.ReuseOutOfCacheBoxedValues=false. - (GR-29373) Eliminate unneeded STORE_LOAD barriers on sequential volatile writes on x86. This improves ConcurrentHashMap performance.
- (GR-29337) Volatile loads were losing type information about the underlying field, resulting in unneeded casts. This improves ConcurrentHashMap performance.
- (GR-28956) Use more informative
ProfileDataobjects instead of raw branch probabilities and loop frequencies.