[PATCH] D62024: [InstCombine] fold shuffles of insert_subvectors

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

In D62024#1505318 <https://reviews.llvm.org/D62024#1505318>, @efriedma wrote:

> Can we make a list somewhere of the shuffles which all targets with vector types are expected to support?


Sure - LangRef or less formal? eg, doxygen code comments for InstCombiner::visitShuffleVectorInst()?


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