[PATCH] D129793: [LSR] Allow already invariant operand for ICmpZero matching

[Philip Reames via Phabricator via llvm-commits]

reames updated this revision to Diff 445082.
reames added a comment.

Version with fix for pointer difference bug.

I think I now understand Arthur's case.  This is visit uses outside of loop L, and L->isLoopInvariant returns true for instructions outside the loop even if that instruction does not dominate L.  Going to reduce a minimal test case (to confirm theory), and then update with the second fix.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D129793/new/

https://reviews.llvm.org/D129793

Files:
  llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
  llvm/test/CodeGen/RISCV/rvv/sink-splat-operands.ll
  llvm/test/Transforms/LoopStrengthReduce/RISCV/icmp-zero.ll

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