diff options
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index 608dde21444..10baccbdf99 100644 --- a/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -6318,7 +6318,7 @@ SDValue SelectionDAGLegalize::ExpandBitCount(unsigned Opc, SDValue Op) { SDValue Tmp3 = DAG.getConstant(1ULL << i, ShVT); Op = DAG.getNode(ISD::OR, VT, Op, DAG.getNode(ISD::SRL, VT, Op, Tmp3)); } - Op = DAG.getNode(ISD::XOR, VT, Op, DAG.getConstant(~0ULL, VT)); + Op = DAG.getNOT(Op, VT); return DAG.getNode(ISD::CTPOP, VT, Op); } case ISD::CTTZ: { @@ -6327,9 +6327,7 @@ SDValue SelectionDAGLegalize::ExpandBitCount(unsigned Opc, SDValue Op) { // { return 32 - nlz(~x & (x-1)); } // see also http://www.hackersdelight.org/HDcode/ntz.cc MVT VT = Op.getValueType(); - SDValue Tmp2 = DAG.getConstant(~0ULL, VT); - SDValue Tmp3 = DAG.getNode(ISD::AND, VT, - DAG.getNode(ISD::XOR, VT, Op, Tmp2), + SDValue Tmp3 = DAG.getNode(ISD::AND, VT, DAG.getNOT(Op, VT), DAG.getNode(ISD::SUB, VT, Op, DAG.getConstant(1, VT))); // If ISD::CTLZ is legal and CTPOP isn't, then do that instead. if (!TLI.isOperationLegal(ISD::CTPOP, VT) && |
