[all-commits] [llvm/llvm-project] c3959f: [MachineLICM] Remove CurPreheader parameter that i...

[Sergei Barannikov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: c3959f22abc62882be6c9df2fe4151c924ac3d9a
      https://github.com/llvm/llvm-project/commit/c3959f22abc62882be6c9df2fe4151c924ac3d9a
  Author: Sergei Barannikov <barannikov88 at gmail.com>
  Date:   2025-04-15 (Tue, 15 Apr 2025)

  Changed paths:
    M llvm/lib/CodeGen/MachineLICM.cpp

  Log Message:
  -----------
  [MachineLICM] Remove CurPreheader parameter that is always nullptr (#135554)

Also, rename `getCurPreheader` -> `getOrCreatePreheader` to make it
clear that this method may alter CFG.

Update `Changed` if the method modified a loop by splitting a critical
edge (this change is not strictly NFC).

The removed parameter was probably intended to save compile time by not
trying to a critical edge after the first attempt has failed, but it is
only tried once per loop.

PR: https://github.com/llvm/llvm-project/pull/135554



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