![]() This is a pattern often seen in generated Java code, such as that output by tools such as ANTLR. This resolves a problem that was preventing Native Image from compiling programs with more than 64 loops in a method body. Improved the Graal compiler to allow compiling ahead-of-time methods with more than 64 loops.Disable it with -H:-GuardHoistingLoopDuplication. Loop duplication needs the profile-guided optimizations data. The fast loop allows more loop optimizations and loop vectorization. The fast loop is chosen if we know at run time that no exceptions can happen. It splits certain loops into “fast” and “slow” versions. Added guard hoisting loop duplication phase which should contribute to ahead-of-time compilation flow (GraalVM Native Image).Added support for applying counted loop optimizations to do/ while loops whose first iteration is not guarded by the loop condition.Added intrinsic for Reference.refersTo and PhantomReference.refersTo just like it was done for C2.The scores on the Renaissance, DaCapo, and ScalaDacapo benchmarks also increased by about 0.5%. Disable it with -Dgraal.SpeculativeGuardMovement=false. This change improves the geomean throughput score of GraalVM Community on SpecJVM2008 by 4.2%. Implemented a Speculative Guard Movement optimization that tries to move a loop invariant guard (e.g., an array bounds check) inside a loop to outside the loop.Enable it with -Dgraal.OptWriteMotion=true. Added an optimization that tries to move writes out of loops, called “Write Sinking.” Write Sinking is an experimental feature disabled by default.The compiler can now eliminate safepoints in loops that have a long induction variable (as opposed to an int) where it can statically prove that the range of the induction variable (i.e., the maximum number of iterations) is Integer.MAX_VALUE - Integer.MIN_VALUE while previously it would only consider int-typed induction variables. Improved safepoint elimination in long counted loops.The core optimizations were improved to handle more code shapes and to constant fold more operations. ![]() This release adds support for this optimization in JDK11 by adding support for the compact String representation used in the JDK. The existing StringBuilderOptimizationPhase performs high level transformations on StringBuilder patterns to directly construct the final String and eliminate unnecessary intermediate Strings and StringBuilders.Enable it with the -Dgraal.StripMineNonCountedLoops=true option. Added a novel Strip Mining optimization for non-counted loops.Enable it with -Dgraal.VectorizeSIMD=true. This optimization is disabled by default until the 21.3 release. ![]() Added a novel SIMD (Single Instruction Multiple Data) vectorization optimization for sequential code.When the loop is counted, it becomes amendable for advanced optimizations like partial unrolling, inversion, and vectorization. The compiler will now detect and refine the range of an induction variable by taking the preceding conditions into account. Improved loop limit analysis for counted loops.16.0.2 for Java 16-based GraalVM Enterprise.11.0.12 for Java 11-based GraalVM Enterprise.8u301 for Java 8-based GraalVM Enterprise.The Oracle JDK release that GraalVM Enterprise Edition is built on was updated to:.16.0.2 for Java 16-based GraalVM Community.8u302 for Java 8 based GraalVM Community.The OpenJDK release that GraalVM Community Edition is built on was updated to:.Truffle Language and Tool Implementations. ![]()
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