Some of the VectorAPIs were inconsistent with their intrinsic declarations, and some of the type arguments were not precise enough as well. E.g.,

The return type of "unaryOp" should be a subtype of "Vector" instead of an all-purpose "Object" [1][2].

The imprecise declarations and type arguments would not effect the correctness but bring bad readability and make the code hard to maintain. This patch is a cleanup for those mismatched declarations of VectorAPIs.

 

[1]https://github.com/openjdk/panama-vector/blob/vectorIntrinsics%2Bmask/src/java.base/share/classes/jdk/internal/vm/vector/VectorSupport.java#L269

[2] https://github.com/openjdk/panama-vector/blob/vectorIntrinsics%2Bmask/src/hotspot/share/classfile/vmIntrinsics.hpp#L812

Ref: https://github.com/openjdk/panama-vector/pull/97#discussion_r672672011