Bug ID: JDK-8359688 C2 SuperWord: missing RCE with MemorySegment

JDK-8359688 : C2 SuperWord: missing RCE with MemorySegment

Type: Enhancement
Component: hotspot
Sub-Component: compiler
Affected Version: 26

Priority: P4
Status: Open
Resolution: Unresolved

Submitted: 2025-06-16
Updated: 2025-06-23

Versions (Unresolved/Resolved/Fixed)

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Other
tbdUnresolved

Related Reports

Relates :	JDK-8360204 - C2 SuperWord: missing RCE with MemorySegment.getAtIndex
Relates :	JDK-8324751 - C2 SuperWord: Aliasing Analysis runtime check
Relates :	JDK-8348096 - C2 SuperWord: investigate failed RCE for MemorySegment test
Relates :	JDK-8331659 - C2 SuperWord: investigate failed vectorization in compiler/loopopts/superword/TestMemorySegment.java
Relates :	JDK-8343536 - C2 SuperWord / MergeStores: investigate missing optimizations in MemorySegment examples
Relates :	JDK-8327209 - C2 MemorySegment: missing RCE and vectorization

Description

See the attached test. Issue could be with the negation of the iv.

I found this during work on JDK-8324751.
Please check if there are more cases in the test from JDK-8324751:
test/hotspot/jtreg/compiler/loopopts/superword/TestAliasingFuzzer.java