[all-commits] [llvm/llvm-project] ccd4e7: [LSR] Make OptimizeLoopTermCond able to handle som...

[John Brawn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ccd4e7b1ed3858c64b4667787929b939513bc929
      https://github.com/llvm/llvm-project/commit/ccd4e7b1ed3858c64b4667787929b939513bc929
  Author: John Brawn <john.brawn at arm.com>
  Date:   2025-12-03 (Wed, 03 Dec 2025)

  Changed paths:
    M llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
    M llvm/test/CodeGen/AArch64/complex-deinterleaving-reductions-predicated-scalable.ll
    A llvm/test/Transforms/LoopStrengthReduce/AArch64/non-cmp-cond.ll

  Log Message:
  -----------
  [LSR] Make OptimizeLoopTermCond able to handle some non-cmp conditions (#165590)

Currently OptimizeLoopTermCond can only convert a cmp instruction to
using a postincrement induction variable, which means it can't handle
predicated loops where the termination condition comes from
get_active_lane_mask. Relax this restriction so that we can handle any
kind of instruction, though only if it's the instruction immediately
before the branch (except for possibly an extractelement).



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