Reverting r56249. On further investigation, this functionality isn't needed.

Apologies for the thrashing.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@56251 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/TargetSelectionDAG.td b/lib/Target/TargetSelectionDAG.td
index a3088ba..230c956 100644
--- a/lib/Target/TargetSelectionDAG.td
+++ b/lib/Target/TargetSelectionDAG.td
@@ -265,10 +265,10 @@
                          "FrameIndexSDNode">;
 def tframeindex : SDNode<"ISD::TargetFrameIndex",     SDTPtrLeaf, [],
                          "FrameIndexSDNode">;
-def externalsym : SDNode<"ISD::Symbol",               SDTPtrLeaf, [],
-                         "SymbolSDNode">;
-def texternalsym: SDNode<"ISD::TargetSymbol",         SDTPtrLeaf, [],
-                         "SymbolSDNode">;
+def externalsym : SDNode<"ISD::ExternalSymbol",       SDTPtrLeaf, [],
+                         "ExternalSymbolSDNode">;
+def texternalsym: SDNode<"ISD::TargetExternalSymbol", SDTPtrLeaf, [],
+                         "ExternalSymbolSDNode">;
 
 def add        : SDNode<"ISD::ADD"       , SDTIntBinOp   ,
                         [SDNPCommutative, SDNPAssociative]>;