diff options
| -rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index cd6a3bf2da..c32da68454 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -4457,8 +4457,21 @@ void SelectionDAGLegalize::ExpandOp(SDOperand Op, SDOperand &Lo, SDOperand &Hi){ break; case ISD::BIT_CONVERT: { - SDOperand Tmp = ExpandBIT_CONVERT(Node->getValueType(0), - Node->getOperand(0)); + SDOperand Tmp; + if (TLI.getOperationAction(ISD::BIT_CONVERT, VT) == TargetLowering::Custom){ + // If the target wants to, allow it to lower this itself. + switch (getTypeAction(Node->getOperand(0).getValueType())) { + case Expand: assert(0 && "cannot expand FP!"); + case Legal: Tmp = LegalizeOp(Node->getOperand(0)); break; + case Promote: Tmp = PromoteOp (Node->getOperand(0)); break; + } + Tmp = TLI.LowerOperation(DAG.getNode(ISD::BIT_CONVERT, VT, Tmp), DAG); + } + + // Turn this into a load/store pair by default. + if (Tmp.Val == 0) + Tmp = ExpandBIT_CONVERT(Node->getValueType(0), Node->getOperand(0)); + ExpandOp(Tmp, Lo, Hi); break; } |