[PATCH] D51929: [DAGCombiner] use UADDO to optimize saturated unsigned add

[Sanjay Patel via Phabricator via llvm-commits]

spatel updated this revision to Diff 165176.
spatel marked 2 inline comments as done.
spatel added a comment.

Patch updated:

1. Removed NFC formatting (https://reviews.llvm.org/rL342095).
2. Added IR example to code comment. This transform has a lot of predicates, and there's no direct twin in IR, so I'm not sure this actually makes it better...but let me know. :)


https://reviews.llvm.org/D51929

Files:
  lib/CodeGen/SelectionDAG/DAGCombiner.cpp
  test/CodeGen/AArch64/sat-add.ll
  test/CodeGen/X86/sat-add.ll

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