Since the operations of "VectorLoadMask" and "VectorStoreMask" are not actually related to memory access, using Load/Store in their names is not very meaningful and can be confusing.

These two nodes are used to implement conversions between a boolean vector and a platform-specific vector mask. It would therefore be helpful to choose more descriptive names for these IR nodes.

There has been prior discussion about renaming them; please see the details in the following thread: https://github.com/openjdk/jdk/pull/27481#discussion_r2466385252