[all-commits] [llvm/llvm-project] 0e8d02: [VPlan] Handle exit phis with multiple operands in...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0e8d022ffe008dd7afffa5140c4d87ce3d77902d
      https://github.com/llvm/llvm-project/commit/0e8d022ffe008dd7afffa5140c4d87ce3d77902d
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-12-18 (Wed, 18 Dec 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/test/Transforms/LoopVectorize/early_exit_legality.ll
    M llvm/test/Transforms/LoopVectorize/single_early_exit_live_outs.ll

  Log Message:
  -----------
  [VPlan] Handle exit phis with multiple operands in addUsersInExitBlocks. (#120260)

Currently the addUsersInExitBlocks incorrectly assumes exit phis only
have a single operand, which may not be the case for loops with early
exits when they share a common exit block.

Also further relax the assertion in fixupIVUsers to allow exit values if
they come from theloop latch/middle.block.

PR: https://github.com/llvm/llvm-project/pull/120260



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