Ta-Wei Tu 7df02820b6 [LoopNest] Use getUniqueSuccessor() instead when checking empty blocks ... Blocks that contain only a single branch instruction to the next block can be skipped in analyzing the loop-nest structure. This is currently done by `getSingleSuccessor()`. However, the branch instruction might have multiple targets which happen to all be the same. In this case, the block should still be considered as empty and skipped. An example is `test/Transforms/LoopInterchange/update-condbranch-duplicate-successors.ll` (the LIT test for this patch is modified from it as well). Reviewed By: Whitney Differential Revision: https://reviews.llvm.org/D97286		2021-02-24 09:53:12 +08:00
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duplicate-successors.ll	[LoopNest] Use getUniqueSuccessor() instead when checking empty blocks	2021-02-24 09:53:12 +08:00
imperfectnest.ll
infinite.ll
nests-with-lcssa.ll
perfectnest.ll	[LoopNest] Allow empty basic blocks without loops	2021-01-05 15:09:38 +00:00