[llvm] [AArch64] Prevent argument promotion of vector with size > 128 bits (PR #70034)

[KAWASHIMA Takahiro via llvm-commits]

kawashima-fj wrote:

@paulwalker-arm This is a fix for #69147.

I took a an approach similar to [PowerPC](https://github.com/llvm/llvm-project/blob/llvmorg-17.0.2/llvm/lib/Target/PowerPC/PPCTargetTransformInfo.cpp#L879).

https://github.com/llvm/llvm-project/pull/70034