[PATCH] D138872: [InstCombine] canonicalize trunc + insert as bitcast + shuffle, part 1

[Sanjay Patel via Phabricator via llvm-commits]

spatel updated this revision to Diff 478962.
spatel added a comment.

Patch updated:

1. Added documentation comment for the general transform.
2. Added TODO for one-use restriction.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D138872/new/

https://reviews.llvm.org/D138872

Files:
  llvm/lib/Transforms/InstCombine/InstCombineVectorOps.cpp
  llvm/test/Transforms/InstCombine/insert-trunc.ll
  llvm/test/Transforms/InstCombine/vec_phi_extract-inseltpoison.ll
  llvm/test/Transforms/InstCombine/vec_phi_extract.ll
  llvm/test/Transforms/LoopVectorize/ARM/pointer_iv.ll
  llvm/test/Transforms/PhaseOrdering/X86/vec-load-combine.ll

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