[all-commits] [llvm/llvm-project] dcdf44: [InstCombine] Remove foldSelectICmpEq() fold (#122...

[Nikita Popov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: dcdf44aca7be8a3e8f36d308b7fd5e5979140574
      https://github.com/llvm/llvm-project/commit/dcdf44aca7be8a3e8f36d308b7fd5e5979140574
  Author: Nikita Popov <npopov at redhat.com>
  Date:   2025-01-09 (Thu, 09 Jan 2025)

  Changed paths:
    M llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
    M llvm/test/Transforms/InstCombine/select.ll

  Log Message:
  -----------
  [InstCombine] Remove foldSelectICmpEq() fold (#122098)

This fold matches complex patterns, for which we have no proof of
real-world relevance, and which does not actually handle the originally
motivating cases from https://github.com/llvm/llvm-project/issues/71792
either.

In https://github.com/llvm/llvm-project/pull/121708 and
https://github.com/llvm/llvm-project/pull/121753 we have handled some
simpler variants by extending existing folds.

I propose to remove this code until we have evidence that it is useful
for something.



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