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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@2777 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 68 insertions, 0 deletions

diff --git a/include/llvm/SymbolTableListTraits.h b/include/llvm/SymbolTableListTraits.h
new file mode 100644
index 0000000000..74aede11a3
--- /dev/null
+++ b/include/llvm/SymbolTableListTraits.h
@@ -0,0 +1,68 @@
+//===-- llvm/SymbolTableListTraits.h - Traits for iplist -------*- C++ -*--===//
+//
+// This file defines a generic class that is used to implement the automatic
+// symbol table manipulation that occurs when you put (for example) a named
+// instruction into a basic block.
+//
+// The way that this is implemented is by using a special traits class with the
+// intrusive list that makes up the list of instructions in a basic block.  When
+// a new element is added to the list of instructions, the traits class is
+// notified, allowing the symbol table to be updated.
+//
+// This generic class implements the traits class.  It must be generic so that
+// it can work for all uses it, which include lists of instructions, basic
+// blocks, arguments, functions, global variables, etc...
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_SYMBOLTABLELISTTRAITS_H
+#define LLVM_SYMBOLTABLELISTTRAITS_H
+
+template<typename NodeTy> class ilist_iterator;
+template<typename NodeTy, typename Traits> class iplist;
+template<typename Ty> struct ilist_traits;
+
+// ValueSubClass  - The type of objects that I hold
+// ItemParentType - I call setParent() on all of my "ValueSubclass" items, and
+//                  this is the value that I pass in.
+// SymTabType     - This is the class type, whose symtab I insert my
+//                  ValueSubClass items into.  Most of the time it is
+//                  ItemParentType, but Instructions have item parents of BB's
+//                  but symtabtype's of a Function
+//
+template<typename ValueSubClass, typename ItemParentClass, typename SymTabClass,
+         typename SubClass=ilist_traits<ValueSubClass> >
+class SymbolTableListTraits {
+  SymTabClass     *SymTabObject;
+  ItemParentClass *ItemParent;
+public:
+  SymbolTableListTraits() : SymTabObject(0), ItemParent(0) {}
+
+        SymTabClass *getParent()       { return SymTabObject; }
+  const SymTabClass *getParent() const { return SymTabObject; }
+
+  static ValueSubClass *getPrev(ValueSubClass *V) { return V->getPrev(); }
+  static ValueSubClass *getNext(ValueSubClass *V) { return V->getNext(); }
+  static const ValueSubClass *getPrev(const ValueSubClass *V) {
+    return V->getPrev();
+  }
+  static const ValueSubClass *getNext(const ValueSubClass *V) {
+    return V->getNext();
+  }
+
+  static void setPrev(ValueSubClass *V, ValueSubClass *P) { V->setPrev(P); }
+  static void setNext(ValueSubClass *V, ValueSubClass *N) { V->setNext(N); }
+
+  void addNodeToList(ValueSubClass *V);
+  void removeNodeFromList(ValueSubClass *V);
+  void transferNodesFromList(iplist<ValueSubClass, 
+                             ilist_traits<ValueSubClass> > &L2,
+                             ilist_iterator<ValueSubClass> first,
+                             ilist_iterator<ValueSubClass> last);
+
+//private:
+  void setItemParent(ItemParentClass *IP) { ItemParent = IP; }//This is private!
+  void setParent(SymTabClass *Parent);  // This is private!
+};
+
+#endif