[lworld] RFR: 8273594: [lworld] JITs need to properly handle static inline type field with unloaded type [v2]

Tobias Hartmann thartmann at openjdk.java.net
Fri Sep 10 12:43:40 UTC 2021

> Both C1 and C2 do not properly handle loads from static inline type fields with an unloaded type. For C1, the fix is to simply remove two asserts that are too strong. For C2, we need to trap during typeflow analysis.
> I've added a corresponding test to `TestUnloadedInlineTypeField.java` and noticed that the new IR Test Framework often triggers class loading while the test was carefully designed to avoid that. As a workaround, I slightly modified the framework and run the test with `-DIgnoreCompilerControls=true`. I filed [JDK-8273591](https://bugs.openjdk.java.net/browse/JDK-8273591) to fix this upstream.
> I also fixed a `-XX:-XX:+PatchALot` typo in the test that went unnoticed because `-XX:+IgnoreUnrecognizedVMOptions` is set.
> Thanks,
> Tobias

Tobias Hartmann has updated the pull request incrementally with one additional commit since the last revision:

  Deoptimization does no longer support symbolic names for the class index, use a simple trap instead


  - all: https://git.openjdk.java.net/valhalla/pull/551/files
  - new: https://git.openjdk.java.net/valhalla/pull/551/files/67815278..835a9005

 - full: https://webrevs.openjdk.java.net/?repo=valhalla&pr=551&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=valhalla&pr=551&range=00-01

  Stats: 19 lines in 4 files changed: 3 ins; 14 del; 2 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/551.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/551/head:pull/551

PR: https://git.openjdk.java.net/valhalla/pull/551

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