[all-commits] [llvm/llvm-project] 111ddc: [FlattenCFG] Fix `MergeIfRegion` in case then-path...

[Ehud Katz via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 111ddc57d3804d31c6d101821abd9688b3e0decc
      https://github.com/llvm/llvm-project/commit/111ddc57d3804d31c6d101821abd9688b3e0decc
  Author: Ehud Katz <ehudkatz at gmail.com>
  Date:   2020-05-21 (Thu, 21 May 2020)

  Changed paths:
    M llvm/lib/Transforms/Utils/FlattenCFG.cpp
    M llvm/test/Transforms/Util/flattencfg.ll

  Log Message:
  -----------
  [FlattenCFG] Fix `MergeIfRegion` in case then-path is empty

In case the then-path of an if-region is empty, then merging with the
else-path should be handled with the inverse of the condition (leading
to that path).

Fix PR37662

Differential Revision: https://reviews.llvm.org/D78881