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path: root/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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-rw-r--r--lib/CodeGen/SelectionDAG/DAGCombiner.cpp46
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() &&