On Wed, 10 Dec 2025 22:09:21 GMT, Chen Liang <[email protected]> wrote:
>> make/jdk/src/classes/build/tools/methodhandle/VarHandleGuardMethodGenerator.java >> line 132: >> >>> 130: // TestZGCBarrierElision.testAtomicThenAtomicAnotherField fails >>> 131: // However, testArrayAtomicThenAtomic, testAtomicThenAtomic, and >>> 132: // testArrayAtomicThenAtomicAtUnknownIndices works >> >> It doesn't look right. What is the root cause of the failure? Can it be a >> test bug? > > I think that is when two different VarHandles are both invoked non-exactly in > two call sites in one method, the 2nd one fails to be inlined, that the > compare-and-exchange from the 2nd one is not present in the final IR. The > deoptimization reason is either "unstable-if" or "too many null checks", I > think I will try look into it in another effort. If it's a test problem, then it's better to comment out the problematic test case instead. ------------- PR Review Comment: https://git.openjdk.org/jdk/pull/28585#discussion_r2608398869
