[llvm] [ARM][NEON] Add constraint to vld2 Odd/Even Pseudo instructions. (PR #79287)

[David Green via llvm-commits]

davemgreen wrote:

Could you add the testcase from https://godbolt.org/z/hevqGKfqj, or ideally change the arm-vlddup.ll test (and maybe vlddup-update.ll too), to have a hard-float calling convention and use update_llc_test_checks to generate the check lines? I think that should show the same issue. Is it possible to test the other variants? They don't have even pairs?

https://github.com/llvm/llvm-project/pull/79287