antoniofrighetto wrote:

> I don't feel this is the right way to fix this problem. This looks like too 
> specific and not really a coalescing problem.

Could you please provide an alternative direction for this? I second this is 
not a coalescing problem, though couldn't we let RegisterCoalescer avoid 
suboptimally recomputing the constant value when unneeded, as in cases above?

https://github.com/llvm/llvm-project/pull/163047
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