[PATCH] D30379: [SelectionDAG] Make SelectionDAG aware of the known bits in UADDO and SADDO.

[Amaury SECHET via Phabricator via llvm-commits]

deadalnix created this revision.

As per title. This is extracted from https://reviews.llvm.org/D29872 and I threw SADDO in.


https://reviews.llvm.org/D30379

Files:
  lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  test/CodeGen/X86/2008-02-14-BitMiscompile.ll
  test/CodeGen/X86/known-bits.ll
  test/CodeGen/X86/sad.ll
  test/CodeGen/X86/select.ll

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