Jingu Kang ff68e43c81 [MachineLICM] Handle Subloops ...

It is a re-commit from reverted commit 3454cf67bd.

Following discussion on https://reviews.llvm.org/D154205, make MachineLICM pass
handle subloops with only visiting outermost loop's blocks once.

Differential Revision: https://reviews.llvm.org/D154205

2023-09-26 14:25:11 +01:00

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