[llvm] [MachineLateInstrsCleanup] Reuse redundant spill-slot reloads (PR #220180)

[Jonas Paulsson via llvm-commits]

JonPsson1 wrote:

> > Spill-slot reloads removed	10,548	27,049	37,597
> 
> @JonPsson1 the numbers are promising right? Even if we remove the guards, we still are getting around 10k and 26k which I think is a considerable improvement and shows the need for the improvement. Would like to get your opinion to conclude. Thanks.

On what target was this? You wrote earlier "planned changes", that's why I haven't commented any further - I was anticipating to try it again on SystemZ with a less conservative implementation..

https://github.com/llvm/llvm-project/pull/220180