[llvm] [AArch64][GlobalISel] Vector Constant Materialization (PR #67149)

[David Green via llvm-commits]

https://github.com/davemgreen commented:

> I ran the CTMark suite at -Os and found these improvements:

That's good to hear, you wouldn't expect a lot of vectors at Os.

https://github.com/llvm/llvm-project/pull/67149