Remove unused MEMBARRIER DAG node; it's been replaced by ATOMIC_FENCE.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179939 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 55 deletions

diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
index 44e212aef0..3b823ad9b6 100644
--- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
+++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
@@ -243,7 +243,6 @@ namespace {
     SDValue visitCONCAT_VECTORS(SDNode *N);
     SDValue visitEXTRACT_SUBVECTOR(SDNode *N);
     SDValue visitVECTOR_SHUFFLE(SDNode *N);
-    SDValue visitMEMBARRIER(SDNode *N);
 
     SDValue XformToShuffleWithZero(SDNode *N);
     SDValue ReassociateOps(unsigned Opc, DebugLoc DL, SDValue LHS, SDValue RHS);
@@ -1165,7 +1164,6 @@ SDValue DAGCombiner::visit(SDNode *N) {
   case ISD::CONCAT_VECTORS:     return visitCONCAT_VECTORS(N);
   case ISD::EXTRACT_SUBVECTOR:  return visitEXTRACT_SUBVECTOR(N);
   case ISD::VECTOR_SHUFFLE:     return visitVECTOR_SHUFFLE(N);
-  case ISD::MEMBARRIER:         return visitMEMBARRIER(N);
   }
   return SDValue();
 }
@@ -9311,59 +9309,6 @@ SDValue DAGCombiner::visitVECTOR_SHUFFLE(SDNode *N) {
   return SDValue();
 }
 
-SDValue DAGCombiner::visitMEMBARRIER(SDNode* N) {
-  if (!TLI.getShouldFoldAtomicFences())
-    return SDValue();
-
-  SDValue atomic = N->getOperand(0);
-  switch (atomic.getOpcode()) {
-    case ISD::ATOMIC_CMP_SWAP:
-    case ISD::ATOMIC_SWAP:
-    case ISD::ATOMIC_LOAD_ADD:
-    case ISD::ATOMIC_LOAD_SUB:
-    case ISD::ATOMIC_LOAD_AND:
-    case ISD::ATOMIC_LOAD_OR:
-    case ISD::ATOMIC_LOAD_XOR:
-    case ISD::ATOMIC_LOAD_NAND:
-    case ISD::ATOMIC_LOAD_MIN:
-    case ISD::ATOMIC_LOAD_MAX:
-    case ISD::ATOMIC_LOAD_UMIN:
-    case ISD::ATOMIC_LOAD_UMAX:
-      break;
-    default:
-      return SDValue();
-  }
-
-  SDValue fence = atomic.getOperand(0);
-  if (fence.getOpcode() != ISD::MEMBARRIER)
-    return SDValue();
-
-  switch (atomic.getOpcode()) {
-    case ISD::ATOMIC_CMP_SWAP:
-      return SDValue(DAG.UpdateNodeOperands(atomic.getNode(),
-                                    fence.getOperand(0),
-                                    atomic.getOperand(1), atomic.getOperand(2),
-                                    atomic.getOperand(3)), atomic.getResNo());
-    case ISD::ATOMIC_SWAP:
-    case ISD::ATOMIC_LOAD_ADD:
-    case ISD::ATOMIC_LOAD_SUB:
-    case ISD::ATOMIC_LOAD_AND:
-    case ISD::ATOMIC_LOAD_OR:
-    case ISD::ATOMIC_LOAD_XOR:
-    case ISD::ATOMIC_LOAD_NAND:
-    case ISD::ATOMIC_LOAD_MIN:
-    case ISD::ATOMIC_LOAD_MAX:
-    case ISD::ATOMIC_LOAD_UMIN:
-    case ISD::ATOMIC_LOAD_UMAX:
-      return SDValue(DAG.UpdateNodeOperands(atomic.getNode(),
-                                    fence.getOperand(0),
-                                    atomic.getOperand(1), atomic.getOperand(2)),
-                     atomic.getResNo());
-    default:
-      return SDValue();
-  }
-}
-
 /// XformToShuffleWithZero - Returns a vector_shuffle if it able to transform
 /// an AND to a vector_shuffle with the destination vector and a zero vector.
 /// e.g. AND V, <0xffffffff, 0, 0xffffffff, 0>. ==>