https://github.com/nikic approved this pull request.

LGTM

Worth noting that this kind of sinking can also increase register pressure in 
the loop. E.g. if you sink an instruction with two operands, and the operand 
instructions cannot be sunk. Then you'll need two registers instead of one in 
the loop.

Though from what I can tell, this does seem to be beneficial on average.

https://github.com/llvm/llvm-project/pull/157559
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