[llvm] [AArch64] Do not allow anyext load in isEquivalentMaskless (PR #216288)

[David Green via llvm-commits]

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davemgreen wrote:

Yeah two of the inputs are already known to be constants. I was contemplating removing the whole transform as there are more modern ways to handle the same thing and it has zero test coverage in llvm. It does seem to come up in larger applications though.

https://github.com/llvm/llvm-project/pull/216288