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| author | Ulrich Weigand <ulrich.weigand@de.ibm.com> | 2018-01-19 20:47:14 +0000 |
|---|---|---|
| committer | Ulrich Weigand <ulrich.weigand@de.ibm.com> | 2018-01-19 20:47:14 +0000 |
| commit | 5605be9e50c58c64aa2aaabf074032f7ac45a462 (patch) | |
| tree | 4922a20d51f0f0ab2df7b0939c4dc48612c627d5 | |
| parent | 758d7a5a336d315f9006fc4a18a2721bde8fc670 (diff) | |
| download | bcm5719-llvm-5605be9e50c58c64aa2aaabf074032f7ac45a462.tar.gz bcm5719-llvm-5605be9e50c58c64aa2aaabf074032f7ac45a462.zip | |
[SelectionDAG] Teach computeKnownBits about ATOMIC_CMP_SWAP_WITH_SUCCESS boolean return value
The second return value of ATOMIC_CMP_SWAP_WITH_SUCCESS is known to be a
boolean, and should therefore be treated by computeKnownBits just like
the second return values of SMULO / UMULO.
Differential Revision: https://reviews.llvm.org/D42067
llvm-svn: 322985
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp index 837173eca3b..045d0ffc1f3 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp @@ -2442,6 +2442,7 @@ void SelectionDAG::computeKnownBits(SDValue Op, KnownBits &Known, break; case ISD::SMULO: case ISD::UMULO: + case ISD::ATOMIC_CMP_SWAP_WITH_SUCCESS: if (Op.getResNo() != 1) break; // The boolean result conforms to getBooleanContents. |
