[llvm] [NewPM] Port for AArch64A53Fix835769 (PR #184965)

[Aiden Grossman via llvm-commits]

boomanaiden154 wrote:

> AIUI right there isn't even a pass builder to test, if there are no existing tests we will do them after. @boomanaiden154 can keep me honest here.

We don't need a pass builder for MIR to MIR tests (where llc only runs a single pass).

But yes, if there are no existing MIR to MIR tests we usually just omit testing.

https://github.com/llvm/llvm-project/pull/184965