diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 37 |
1 files changed, 30 insertions, 7 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index f9703256..a065d90 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -955,14 +955,37 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) { } assert(0 && "Unreachable"); } - case ISD::EXTRACT_ELEMENT: - // Get both the low and high parts. - ExpandOp(Node->getOperand(0), Tmp1, Tmp2); - if (cast<ConstantSDNode>(Node->getOperand(1))->getValue()) - Result = Tmp2; // 1 -> Hi - else - Result = Tmp1; // 0 -> Lo + case ISD::EXTRACT_ELEMENT: { + MVT::ValueType OpTy = Node->getOperand(0).getValueType(); + switch (getTypeAction(OpTy)) { + default: + assert(0 && "EXTRACT_ELEMENT action for type unimplemented!"); + break; + case Legal: + if (cast<ConstantSDNode>(Node->getOperand(1))->getValue()) { + // 1 -> Hi + Result = DAG.getNode(ISD::SRL, OpTy, Node->getOperand(0), + DAG.getConstant(MVT::getSizeInBits(OpTy)/2, + TLI.getShiftAmountTy())); + Result = DAG.getNode(ISD::TRUNCATE, Node->getValueType(0), Result); + } else { + // 0 -> Lo + Result = DAG.getNode(ISD::TRUNCATE, Node->getValueType(0), + Node->getOperand(0)); + } + Result = LegalizeOp(Result); + break; + case Expand: + // Get both the low and high parts. + ExpandOp(Node->getOperand(0), Tmp1, Tmp2); + if (cast<ConstantSDNode>(Node->getOperand(1))->getValue()) + Result = Tmp2; // 1 -> Hi + else + Result = Tmp1; // 0 -> Lo + break; + } break; + } case ISD::CopyToReg: Tmp1 = LegalizeOp(Node->getOperand(0)); // Legalize the chain. |