[SLP][NFC] Cleanup: Remove KeyNodes set.
authorVasileios Porpodas <vporpodas@google.com>
Fri, 5 May 2023 22:33:39 +0000 (15:33 -0700)
committerVasileios Porpodas <vporpodas@google.com>
Fri, 19 May 2023 17:30:02 +0000 (10:30 -0700)
commit338fc7620013c00452e1756080c7beafc56e6001
tree5da5020657f2c01d529de7ddf9ecef912476a4e6
parentaa2c2c8e3c3fe74f2b374b3fdc703ca7b05f80a0
[SLP][NFC] Cleanup: Remove KeyNodes set.

I don't see a good reason form having the `KeyNodes` set.
This patch removes the set.

Differential Revision: https://reviews.llvm.org/D150918
llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp