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Make sure to legalize generated ctpop nodes, convert tabs to spaces
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21868 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -1134,15 +1134,15 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
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}
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case ISD::CTLZ: {
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/* for now, we do this:
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x = x | (x >> 1);
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x = x | (x >> 2);
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...
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x = x | (x >>16);
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x = x | (x >>32); // for 64-bit input
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return popcount(~x);
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x = x | (x >> 1);
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x = x | (x >> 2);
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...
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x = x | (x >>16);
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x = x | (x >>32); // for 64-bit input
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return popcount(~x);
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but see also: http://www.hackersdelight.org/HDcode/nlz.cc */
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MVT::ValueType VT = Tmp1.getValueType();
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but see also: http://www.hackersdelight.org/HDcode/nlz.cc */
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MVT::ValueType VT = Tmp1.getValueType();
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MVT::ValueType ShVT = TLI.getShiftAmountTy();
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unsigned len = getSizeInBits(VT);
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for (unsigned i = 0; (1U << i) <= (len / 2); ++i) {
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@ -1151,19 +1151,19 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) {
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DAG.getNode(ISD::SRL, VT, Tmp1, Tmp3));
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}
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Tmp3 = DAG.getNode(ISD::XOR, VT, Tmp1, DAG.getConstant(~0ULL, VT));
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Result = DAG.getNode(ISD::CTPOP, VT, Tmp3);
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Result = LegalizeOp(DAG.getNode(ISD::CTPOP, VT, Tmp3));
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break;
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}
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case ISD::CTTZ: {
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// for now, we use: { return popcount(~x & (x - 1)); }
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// but see also http://www.hackersdelight.org/HDcode/ntz.cc )
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MVT::ValueType VT = Tmp1.getValueType();
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Tmp2 = DAG.getConstant(~0ULL, VT);
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Tmp3 = DAG.getNode(ISD::AND, VT,
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DAG.getNode(ISD::XOR, VT, Tmp1, Tmp2),
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DAG.getNode(ISD::SUB, VT, Tmp1,
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DAG.getConstant(1, VT)));
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Result = DAG.getNode(ISD::CTPOP, VT, Tmp3);
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// for now, we use: { return popcount(~x & (x - 1)); }
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// but see also http://www.hackersdelight.org/HDcode/ntz.cc
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MVT::ValueType VT = Tmp1.getValueType();
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Tmp2 = DAG.getConstant(~0ULL, VT);
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Tmp3 = DAG.getNode(ISD::AND, VT,
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DAG.getNode(ISD::XOR, VT, Tmp1, Tmp2),
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DAG.getNode(ISD::SUB, VT, Tmp1,
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DAG.getConstant(1, VT)));
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Result = LegalizeOp(DAG.getNode(ISD::CTPOP, VT, Tmp3));
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break;
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}
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default:
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