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

[Sanjay Patel via Phabricator via llvm-commits]

spatel updated this revision to Diff 199915.
spatel added a comment.

Patch updated:
Added descriptive text to CodeGenerator.rst to document our (previously unstated?) rules about creating shuffles in IR.
The docs folder seems easier to point to than a doxygen comment, but I'm open to suggestions. We could duplicate text or link to the docs file within the source code to make it more likely to be found. Also, the text is likely not completely accurate, so any refinement ideas are welcome.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D62024/new/

https://reviews.llvm.org/D62024

Files:
  llvm/docs/CodeGenerator.rst
  llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
  llvm/test/Transforms/InstCombine/vec_shuffle.ll

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