Roman Lebedev 9c4c2f2472
[SimplifyCFG] Tail-merging all blocks with ret terminator
Based ontop of D104598, which is a NFCI-ish refactoring.
Here, a restriction, that only empty blocks can be merged, is lifted.

Reviewed By: rnk

Differential Revision: https://reviews.llvm.org/D104597
2021-06-24 13:15:39 +03:00
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