Bug ID: JDK-8335113 C2 MergeStores: allow merging of putChar and other larger stores on smaller array elements

JDK-8335113 : C2 MergeStores: allow merging of putChar and other larger stores on smaller array elements

Type: Enhancement
Component: hotspot
Sub-Component: compiler
Affected Version: 24

Priority: P4
Status: Closed
Resolution: Duplicate

Submitted: 2024-06-25
Updated: 2024-07-01
Resolved: 2024-07-01

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tbdResolved

Currently, MergeStores is limited to stores of the same size as the array elements.

But this means putChar of 2-bytes are not permitted to be merged for byte arrays.

Also see:
https://github.com/openjdk/jdk/pull/19626#issuecomment-2189509983

Duplicate :	JDK-8335392 - C2 MergeStores: enhanced pointer parsing
Relates :	JDK-8318446 - C2: optimize stores into primitive arrays by combining values into larger store