[llvm] [SystemZ] Eliminate call sequence instructions early. (PR #77812)

[Jonas Paulsson via llvm-commits]

JonPsson1 wrote:

> Do you have any numbers how benchmarks would be affected by just removing the instructions early?

See above: https://github.com/llvm/llvm-project/pull/77812#discussion_r1450911878

> Do we know what specifically could be improved? (I guess we'd have to identify some actual regression first ...)

I can give it a try and see...

https://github.com/llvm/llvm-project/pull/77812