[PATCH] D83284: [InstCombine] Improve select -> phi canonicalization: consider more blocks

[Max Kazantsev via Phabricator via llvm-commits]

mkazantsev created this revision.
mkazantsev added reviewers: nikic, lebedev.ri, fhahn, asbirlea.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

We can try to replace select with a Phi not in its parent block alone, but also in blocks of its arguments.
We benefit from it when select's argument is a Phi.


https://reviews.llvm.org/D83284

Files:
  llvm/lib/Transforms/InstCombine/InstCombineSelect.cpp
  llvm/test/Transforms/InstCombine/select.ll

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