[jdk17u-dev] RFR: 8274130: C2: MulNode::Ideal chained transformations may act on wrong nodes

Tue Dec 21 20:02:30 UTC 2021

On Tue, 21 Dec 2021 19:23:04 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> Unclean backport to fix the potential C2 bug. The uncleanliness comes from the fact that [JDK-8273454](https://bugs.openjdk.java.net/browse/JDK-8273454) is missing in 17, therefore its hunk is ignored. But the other change, [JDK-8263006](https://bugs.openjdk.java.net/browse/JDK-8263006) is present in 17, which still introduces the bug this fix addresses.
> 
> Additional testing:
>  - [x] Linux x86_64 fastdebug `tier1`
>  - [x] Linux x86_64 fastdebug `tier1`
>  - [ ] Linux x86_64 fastdebug `tier3`

Backport changes look good.

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Marked as reviewed by kvn (Reviewer).

PR: https://git.openjdk.java.net/jdk17u-dev/pull/25