From 2a2de66db2093a5bc1fd620d1b6ae7992a552b24 Mon Sep 17 00:00:00 2001
From: Andrew Lenharth <andrewl@lenharth.org>
Date: Sun, 23 Oct 2005 03:40:17 +0000
Subject: [PATCH] add TargetExternalSymbol

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23886 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/CodeGen/SelectionDAG.h       |  2 ++
 include/llvm/CodeGen/SelectionDAGNodes.h  |  9 ++++++---
 lib/CodeGen/SelectionDAG/SelectionDAG.cpp | 14 +++++++++++++-
 3 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/include/llvm/CodeGen/SelectionDAG.h b/include/llvm/CodeGen/SelectionDAG.h
index 44d14a81e5e..8750cdee1a9 100644
--- a/include/llvm/CodeGen/SelectionDAG.h
+++ b/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;
diff --git a/include/llvm/CodeGen/SelectionDAGNodes.h b/include/llvm/CodeGen/SelectionDAGNodes.h
index 1f3604a5ae8..8f20b395e3d 100644
--- a/include/llvm/CodeGen/SelectionDAGNodes.h
+++ b/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;
   }
 };
 
diff --git a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index a8489d29656..7d3cddb6568 100644
--- a/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -312,6 +312,9 @@ void SelectionDAG::RemoveNodeFromCSEMaps(SDNode *N) {
   case ISD::ExternalSymbol:
     Erased = ExternalSymbols.erase(cast<ExternalSymbolSDNode>(N)->getSymbol());
     break;
+  case ISD::TargetExternalSymbol:
+    Erased = TargetExternalSymbols.erase(cast<ExternalSymbolSDNode>(N)->getSymbol());
+    break;
   case ISD::VALUETYPE:
     Erased = ValueTypeNodes[cast<VTSDNode>(N)->getVT()] != 0;
     ValueTypeNodes[cast<VTSDNode>(N)->getVT()] = 0;
@@ -551,7 +554,15 @@ SDOperand SelectionDAG::getValueType(MVT::ValueType VT) {
 SDOperand SelectionDAG::getExternalSymbol(const char *Sym, MVT::ValueType VT) {
   SDNode *&N = ExternalSymbols[Sym];
   if (N) return SDOperand(N, 0);
-  N = new ExternalSymbolSDNode(Sym, VT);
+  N = new ExternalSymbolSDNode(false, Sym, VT);
+  AllNodes.push_back(N);
+  return SDOperand(N, 0);
+}
+
+SDOperand SelectionDAG::getTargetExternalSymbol(const char *Sym, MVT::ValueType VT) {
+  SDNode *&N = TargetExternalSymbols[Sym];
+  if (N) return SDOperand(N, 0);
+  N = new ExternalSymbolSDNode(true, Sym, VT);
   AllNodes.push_back(N);
   return SDOperand(N, 0);
 }
@@ -1586,6 +1597,7 @@ const char *SDNode::getOperationName(const SelectionDAG *G) const {
   case ISD::BasicBlock:    return "BasicBlock";
   case ISD::Register:      return "Register";
   case ISD::ExternalSymbol: return "ExternalSymbol";
+  case ISD::TargetExternalSymbol: return "TargetExternalSymbol";
   case ISD::ConstantPool:  return "ConstantPool";
   case ISD::TargetConstantPool:  return "TargetConstantPool";
   case ISD::CopyToReg:     return "CopyToReg";
-- 
2.34.1