RFR: 8265956: JVM crashes when matching LShiftVB Node [v2]

Wang Huang whuang at openjdk.java.net
Wed Apr 28 09:52:22 UTC 2021

> It is fount that the rule `match(Set dst (LShiftVB src shift))` is missing on many cpus, such like `aarch64` and `x86`. It is this reason that JVM will crash under `JDK-8265956`'s test case. In this commit, I :
> * show the crash case `TestVectorShuffleIotaShort`
> * solve the issue on `aarch64` and `x86` by adding the rule. 
> * test after fixing on tire1~3
> Thank you for your review. Any suggestion is welcome. 
>                          Wang Huang

Wang Huang has updated the pull request incrementally with one additional commit since the last revision:

  add m4 file


  - all: https://git.openjdk.java.net/jdk/pull/3747/files
  - new: https://git.openjdk.java.net/jdk/pull/3747/files/b416645b..3d11bb1a

 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=3747&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=3747&range=00-01

  Stats: 6 lines in 2 files changed: 3 ins; 2 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3747.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3747/head:pull/3747

PR: https://git.openjdk.java.net/jdk/pull/3747

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