[all-commits] [llvm/llvm-project] cde681: [InstCombine] Replace phi operands in successors o...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: cde681c865302f689f0937e5ec2e127a089a4db3
      https://github.com/llvm/llvm-project/commit/cde681c865302f689f0937e5ec2e127a089a4db3
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2023-06-09 (Fri, 09 Jun 2023)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
    M llvm/test/Transforms/InstCombine/unreachable-code.ll

  Log Message:
  -----------
  [InstCombine] Replace phi operands in successors of unreachable block

Set these operands to poison, which might allow folding the phi node,
or reduce the use count of an instruction.