[all-commits] [llvm/llvm-project] 9a17bf: [LoopNest] Allow empty basic blocks without loops

[llvmbot via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 9a17bff4f715a9f3ec89f4eacae8fdea1b74fe79
      https://github.com/llvm/llvm-project/commit/9a17bff4f715a9f3ec89f4eacae8fdea1b74fe79
  Author: Whitney Tsang <whitneyt at ca.ibm.com>
  Date:   2021-01-04 (Mon, 04 Jan 2021)

  Changed paths:
    M llvm/include/llvm/Analysis/LoopNestAnalysis.h
    M llvm/include/llvm/Transforms/Utils/BasicBlockUtils.h
    M llvm/lib/Analysis/LoopNestAnalysis.cpp
    M llvm/lib/Transforms/Utils/BasicBlockUtils.cpp
    M llvm/test/Analysis/LoopNestAnalysis/perfectnest.ll

  Log Message:
  -----------
  [LoopNest] Allow empty basic blocks without loops

Allow loop nests with empty basic blocks without loops in different
levels as perfect.

Reviewers: Meinersbur

Differential Revision: https://reviews.llvm.org/D93665