[PATCH] D115179: [NFC] Clarify comment about LoopDeletionPass in the optimization pipeline

[Arthur Eubanks via Phabricator via llvm-commits]

aeubanks added a comment.

In D115179#3174484 <https://reviews.llvm.org/D115179#3174484>, @lebedev.ri wrote:

> FTR i will be rather surprised if that alone would fully alleviate the need for this late loopdelete.

Changing the `EarlyCSEPass` in `PassBuilder::buildFunctionSimplificationPipeline()` to `GVNPass` does make `llvm/test/Transforms/PhaseOrdering/deletion-of-loops-that-became-side-effect-free.ll` pass if we delete the -O1 RUN line


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https://reviews.llvm.org/D115179