[PATCH] D75943: [LoopInterchange] Do not break LCSSA

[Alexey Zhikhartsev via Phabricator via llvm-commits]

alexey.zhikhar created this revision.
alexey.zhikhar added a reviewer: fhahn.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

Previously LCSSA was getting broken by placing instructions into the
(newly) inner *header* instead of the *pre*header.

Fixes PR43474


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D75943

Files:
  llvm/lib/Transforms/Scalar/LoopInterchange.cpp
  llvm/test/Transforms/LoopInterchange/lcssa-preheader.ll

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