diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/LegalizeDAG.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index ab7e00f80a..6bfe954601 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -3016,11 +3016,33 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) { } break; + case ISD::FP_ROUND: + if (TLI.getOperationAction(Node->getOpcode(), Node->getValueType(0)) == + TargetLowering::Expand) { + // The only way we can lower this is to turn it into a TRUNCSTORE, + // EXTLOAD pair, targetting a temporary location (a stack slot). + + // NOTE: there is a choice here between constantly creating new stack + // slots and always reusing the same one. We currently always create + // new ones, as reuse may inhibit scheduling. + MVT::ValueType VT = Op.getValueType(); // 32 + const Type *Ty = MVT::getTypeForValueType(VT); + uint64_t TySize = TLI.getTargetData()->getTypeSize(Ty); + unsigned Align = TLI.getTargetData()->getPrefTypeAlignment(Ty); + MachineFunction &MF = DAG.getMachineFunction(); + int SSFI = + MF.getFrameInfo()->CreateStackObject(TySize, Align); + SDOperand StackSlot = DAG.getFrameIndex(SSFI, TLI.getPointerTy()); + Result = DAG.getTruncStore(DAG.getEntryNode(), Node->getOperand(0), + StackSlot, NULL, 0, VT); + Result = DAG.getLoad(VT, Result, StackSlot, NULL, 0, VT); + break; + } + // FALL THROUGH case ISD::ANY_EXTEND: case ISD::ZERO_EXTEND: case ISD::SIGN_EXTEND: case ISD::FP_EXTEND: - case ISD::FP_ROUND: switch (getTypeAction(Node->getOperand(0).getValueType())) { case Expand: assert(0 && "Shouldn't need to expand other operators here!"); case Legal: |