add TargetExternalSymbol

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23886 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/SelectionDAG.h

@@ -111,6 +111,7 @@ public:
   SDOperand getTargetConstantPool(Constant *C, MVT::ValueType VT);
   SDOperand getBasicBlock(MachineBasicBlock *MBB);
   SDOperand getExternalSymbol(const char *Sym, MVT::ValueType VT);
+  SDOperand getTargetExternalSymbol(const char *Sym, MVT::ValueType VT);
   SDOperand getValueType(MVT::ValueType);
   SDOperand getRegister(unsigned Reg, MVT::ValueType VT);
 
@@ -382,6 +383,7 @@ private:
   std::map<MachineBasicBlock *, SDNode*> BBNodes;
   std::vector<SDNode*> ValueTypeNodes;
   std::map<std::string, SDNode*> ExternalSymbols;
+  std::map<std::string, SDNode*> TargetExternalSymbols;
   std::map<std::pair<unsigned,
                      std::pair<MVT::ValueType, std::vector<SDOperand> > >,
            SDNode*> OneResultNodes;

include/llvm/CodeGen/SelectionDAGNodes.h

@@ -74,6 +74,7 @@ namespace ISD {
     TargetGlobalAddress,
     TargetFrameIndex,
     TargetConstantPool,
+    TargetExternalSymbol,
 
     // CopyToReg - This node has three operands: a chain, a register number to
     // set to this value, and a value.  
@@ -932,8 +933,9 @@ class ExternalSymbolSDNode : public SDNode {
   const char *Symbol;
 protected:
   friend class SelectionDAG;
-  ExternalSymbolSDNode(const char *Sym, MVT::ValueType VT)
-    : SDNode(ISD::ExternalSymbol, VT), Symbol(Sym) {
+  ExternalSymbolSDNode(bool isTarget, const char *Sym, MVT::ValueType VT)
+    : SDNode(isTarget ? ISD::TargetExternalSymbol : ISD::ExternalSymbol, VT),
+      Symbol(Sym) {
     }
 public:
 
@@ -941,7 +943,8 @@ public:
 
   static bool classof(const ExternalSymbolSDNode *) { return true; }
   static bool classof(const SDNode *N) {
-    return N->getOpcode() == ISD::ExternalSymbol;
+    return N->getOpcode() == ISD::ExternalSymbol ||
+           N->getOpcode() == ISD::TargetExternalSymbol;
   }
 };