[PATCH] D148514: [BranchFolding] Remove redundant conditional branch.

[Serguei Katkov via Phabricator via llvm-commits]

skatkov created this revision.
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BB1: Conditional jump outside

  Fallthrough or explicit branch to BB2

BB2: The same conditional branch leading to somewhere else outside

  Fallthrough or explicit branch to BB3

can be transformed to
BB1: Conditional jump outside

  Fallthrough or explicit branch to BB2

BB2: Fallthrough or explicit branch to BB3


https://reviews.llvm.org/D148514

Files:
  llvm/lib/CodeGen/BranchFolding.cpp
  llvm/test/CodeGen/AMDGPU/swdev373493.ll
  llvm/test/CodeGen/Hexagon/newvaluejump-kill.ll
  llvm/test/CodeGen/PowerPC/aantidep-inline-asm-use.ll
  llvm/test/CodeGen/PowerPC/bdzlr.ll
  llvm/test/CodeGen/PowerPC/ifcvt-forked-bug-2016-08-08.ll
  llvm/test/CodeGen/PowerPC/p10-spill-crlt.ll
  llvm/test/CodeGen/PowerPC/p10-spill-crun.ll
  llvm/test/CodeGen/PowerPC/ppc-shrink-wrapping.ll
  llvm/test/CodeGen/PowerPC/pr45448.ll
  llvm/test/CodeGen/PowerPC/pr49509.ll
  llvm/test/CodeGen/Thumb/consthoist-few-dependents.ll
  llvm/test/CodeGen/Thumb2/thumb2-cbnz.ll
  llvm/test/CodeGen/X86/2007-11-30-LoadFolding-Bug.ll
  llvm/test/CodeGen/X86/2008-04-17-CoalescerBug.ll

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