diff options
Diffstat (limited to 'lib/CodeGen')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 46 |
1 files changed, 0 insertions, 46 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 4ac6d1b5163..0c5cd3e6cab 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -5308,52 +5308,6 @@ SDValue DAGCombiner::visitTRUNCATE(SDNode *N) { if (Reduced.getNode()) return Reduced; } - // fold (trunc (fptoXi x)) -> (smaller fptoXi x) - if ((N0.getOpcode() == ISD::FP_TO_UINT || - N0.getOpcode() == ISD::FP_TO_SINT) && !LegalTypes) - return DAG.getNode(N0.getOpcode(), N->getDebugLoc(), VT, N0.getOperand(0)); - // fold (trunc (concat ... x ...)) -> (concat ..., (trunc x), ...)), - // where ... are all 'undef'. - if (N0.getOpcode() == ISD::CONCAT_VECTORS && !LegalTypes) { - SmallVector<EVT, 8> VTs; - SDValue V; - unsigned Idx = 0; - unsigned NumDefs = 0; - - for (unsigned i = 0, e = N0.getNumOperands(); i != e; ++i) { - SDValue X = N0.getOperand(i); - if (X.getOpcode() != ISD::UNDEF) { - V = X; - Idx = i; - NumDefs++; - } - // Stop if more than one members are non-undef. - if (NumDefs > 1) - break; - VTs.push_back(EVT::getVectorVT(*DAG.getContext(), - VT.getVectorElementType(), - X.getValueType().getVectorNumElements())); - } - - if (NumDefs == 0) - return DAG.getUNDEF(VT); - - if (NumDefs == 1) { - assert(V.getNode() && "The single defined operand is empty!"); - SmallVector<SDValue, 8> Opnds; - for (unsigned i = 0, e = VTs.size(); i != e; ++i) { - if (i != Idx) { - Opnds.push_back(DAG.getUNDEF(VTs[i])); - continue; - } - SDValue NV = DAG.getNode(ISD::TRUNCATE, V.getDebugLoc(), VTs[i], V); - AddToWorkList(NV.getNode()); - Opnds.push_back(NV); - } - return DAG.getNode(ISD::CONCAT_VECTORS, N->getDebugLoc(), VT, - &Opnds[0], Opnds.size()); - } - } // Simplify the operands using demanded-bits information. if (!VT.isVector() && |