RFR: 8324752: C2 Superword: remove SuperWordRTDepCheck

Fri Jan 26 20:31:34 UTC 2024

On Fri, 26 Jan 2024 10:11:29 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

> Subtask of https://github.com/openjdk/jdk/pull/16620
> 
> SuperWordRTDepCheck is a debug-only flag, which detects if there are arrays in the same slice that have different bases, i.e. may be different arrays. This could be the basis for alias-analysis.
> 
> We should do aliasing-analysis properly in a future RFE ([JDK-8324751](https://bugs.openjdk.org/browse/JDK-8324751)). If we can prove (statically or with a runtime-check) that two arrays are different, then this removes edges from the dependency graph, and may allow vectorization that would otherwise not be possible.

Looks good!

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Marked as reviewed by chagedorn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/17585#pullrequestreview-1846502169