[PATCH] D29521: Add ADDC to SelectionDAG::computeKnownBits and ComputeNumSignBits.

[Amaury SECHET via Phabricator via llvm-commits]

deadalnix updated this revision to Diff 87173.
deadalnix added a comment.

Add test case for add and adc.

The test case for adc is a bit complex, but it was necessary to put the adc in a context where its surrounding cannot be optimized away. That means computing a result using the carry, and returning it somehow, while making sure the result of the adc itself can be optimized away.


https://reviews.llvm.org/D29521

Files:
  lib/CodeGen/SelectionDAG/SelectionDAG.cpp
  test/CodeGen/X86/known-bits.ll

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