diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/LegalizeDAG.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 20 |
1 files changed, 15 insertions, 5 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index 156cc70..75f5761 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -785,7 +785,6 @@ void SelectionDAGLegalize::LegalizeOp(SDNode *Node) { case ISD::FRAME_TO_ARGS_OFFSET: case ISD::EH_SJLJ_SETJMP: case ISD::EH_SJLJ_LONGJMP: - case ISD::EH_SJLJ_DISPATCHSETUP: // These operations lie about being legal: when they claim to be legal, // they should actually be expanded. Action = TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0)); @@ -2383,6 +2382,9 @@ SDValue SelectionDAGLegalize::ExpandBitCount(unsigned Opc, SDValue Op, return Op; } + case ISD::CTLZ_ZERO_UNDEF: + // This trivially expands to CTLZ. + return DAG.getNode(ISD::CTLZ, dl, Op.getValueType(), Op); case ISD::CTLZ: { // for now, we do this: // x = x | (x >> 1); @@ -2404,6 +2406,9 @@ SDValue SelectionDAGLegalize::ExpandBitCount(unsigned Opc, SDValue Op, Op = DAG.getNOT(dl, Op, VT); return DAG.getNode(ISD::CTPOP, dl, VT, Op); } + case ISD::CTTZ_ZERO_UNDEF: + // This trivially expands to CTTZ. + return DAG.getNode(ISD::CTTZ, dl, Op.getValueType(), Op); case ISD::CTTZ: { // for now, we use: { return popcount(~x & (x - 1)); } // unless the target has ctlz but not ctpop, in which case we use: @@ -2518,7 +2523,9 @@ void SelectionDAGLegalize::ExpandNode(SDNode *Node) { switch (Node->getOpcode()) { case ISD::CTPOP: case ISD::CTLZ: + case ISD::CTLZ_ZERO_UNDEF: case ISD::CTTZ: + case ISD::CTTZ_ZERO_UNDEF: Tmp1 = ExpandBitCount(Node->getOpcode(), Node->getOperand(0), dl); Results.push_back(Tmp1); break; @@ -2538,7 +2545,6 @@ void SelectionDAGLegalize::ExpandNode(SDNode *Node) { case ISD::PREFETCH: case ISD::VAEND: case ISD::EH_SJLJ_LONGJMP: - case ISD::EH_SJLJ_DISPATCHSETUP: // If the target didn't expand these, there's nothing to do, so just // preserve the chain and be done. Results.push_back(Node->getOperand(0)); @@ -3421,20 +3427,24 @@ void SelectionDAGLegalize::PromoteNode(SDNode *Node) { SDValue Tmp1, Tmp2, Tmp3; switch (Node->getOpcode()) { case ISD::CTTZ: + case ISD::CTTZ_ZERO_UNDEF: case ISD::CTLZ: + case ISD::CTLZ_ZERO_UNDEF: case ISD::CTPOP: // Zero extend the argument. Tmp1 = DAG.getNode(ISD::ZERO_EXTEND, dl, NVT, Node->getOperand(0)); - // Perform the larger operation. + // Perform the larger operation. For CTPOP and CTTZ_ZERO_UNDEF, this is + // already the correct result. Tmp1 = DAG.getNode(Node->getOpcode(), dl, NVT, Tmp1); if (Node->getOpcode() == ISD::CTTZ) { - //if Tmp1 == sizeinbits(NVT) then Tmp1 = sizeinbits(Old VT) + // FIXME: This should set a bit in the zero extended value instead. Tmp2 = DAG.getSetCC(dl, TLI.getSetCCResultType(NVT), Tmp1, DAG.getConstant(NVT.getSizeInBits(), NVT), ISD::SETEQ); Tmp1 = DAG.getNode(ISD::SELECT, dl, NVT, Tmp2, DAG.getConstant(OVT.getSizeInBits(), NVT), Tmp1); - } else if (Node->getOpcode() == ISD::CTLZ) { + } else if (Node->getOpcode() == ISD::CTLZ || + Node->getOpcode() == ISD::CTLZ_ZERO_UNDEF) { // Tmp1 = Tmp1 - (sizeinbits(NVT) - sizeinbits(Old VT)) Tmp1 = DAG.getNode(ISD::SUB, dl, NVT, Tmp1, DAG.getConstant(NVT.getSizeInBits() - |