diff options
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 5a393581ee7..2bc0dfed320 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -5392,21 +5392,6 @@ SDValue DAGCombiner::visitXOR(SDNode *N) { AddToWorklist(NotX.getNode()); return DAG.getNode(ISD::AND, SDLoc(N), VT, NotX, N1); } - // fold (xor (xor x, c1), c2) -> (xor x, (xor c1, c2)) - if (N1C && N0.getOpcode() == ISD::XOR) { - if (const ConstantSDNode *N00C = getAsNonOpaqueConstant(N0.getOperand(0))) { - SDLoc DL(N); - return DAG.getNode(ISD::XOR, DL, VT, N0.getOperand(1), - DAG.getConstant(N1C->getAPIntValue() ^ - N00C->getAPIntValue(), DL, VT)); - } - if (const ConstantSDNode *N01C = getAsNonOpaqueConstant(N0.getOperand(1))) { - SDLoc DL(N); - return DAG.getNode(ISD::XOR, DL, VT, N0.getOperand(0), - DAG.getConstant(N1C->getAPIntValue() ^ - N01C->getAPIntValue(), DL, VT)); - } - } // fold Y = sra (X, size(X)-1); xor (add (X, Y), Y) -> (abs X) unsigned OpSizeInBits = VT.getScalarSizeInBits(); |
