diff options
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/LegalizeDAG.cpp | 45 |
1 files changed, 15 insertions, 30 deletions
diff --git a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp index 8187b3c080..3d1b47d3f3 100644 --- a/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp +++ b/lib/CodeGen/SelectionDAG/LegalizeDAG.cpp @@ -3194,51 +3194,36 @@ SDOperand SelectionDAGLegalize::LegalizeOp(SDOperand Op) { } break; - case ISD::FP_EXTEND: { - MVT::ValueType newVT = Op.getValueType(); - MVT::ValueType oldVT = Op.getOperand(0).getValueType(); - if (TLI.getConvertAction(oldVT, newVT) == TargetLowering::Expand) { - // The only way we can lower this is to turn it into a STORE, - // 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. - const Type *Ty = MVT::getTypeForValueType(oldVT); - 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.getStore(DAG.getEntryNode(), Node->getOperand(0), - StackSlot, NULL, 0); - Result = DAG.getExtLoad(ISD::EXTLOAD, newVT, - Result, StackSlot, NULL, 0, oldVT); - break; - } - } - // FALL THROUGH (to ANY_EXTEND case) + case ISD::FP_EXTEND: case ISD::FP_ROUND: { MVT::ValueType newVT = Op.getValueType(); MVT::ValueType oldVT = Op.getOperand(0).getValueType(); if (TLI.getConvertAction(oldVT, newVT) == TargetLowering::Expand) { - // The only way we can lower this is to turn it into a TRUNCSTORE, + // The only way we can lower this is to turn it into a STORE, // LOAD 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. - const Type *Ty = MVT::getTypeForValueType(newVT); + MVT::ValueType slotVT = + (Node->getOpcode() == ISD::FP_EXTEND) ? oldVT : newVT; + const Type *Ty = MVT::getTypeForValueType(slotVT); 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, newVT); - Result = DAG.getLoad(newVT, Result, StackSlot, NULL, 0, newVT); + if (Node->getOpcode() == ISD::FP_EXTEND) { + Result = DAG.getStore(DAG.getEntryNode(), Node->getOperand(0), + StackSlot, NULL, 0); + Result = DAG.getExtLoad(ISD::EXTLOAD, newVT, + Result, StackSlot, NULL, 0, oldVT); + } else { + Result = DAG.getTruncStore(DAG.getEntryNode(), Node->getOperand(0), + StackSlot, NULL, 0, newVT); + Result = DAG.getLoad(newVT, Result, StackSlot, NULL, 0, newVT); + } break; } } |