The TargetData is not used for the isPowerOfTwo determination. It has never

[oota-llvm.git] / include / llvm / Analysis / CallGraph.h

diff --git a/include/llvm/Analysis/CallGraph.h b/include/llvm/Analysis/CallGraph.h
index 0e997cab7ff5903442a30246ab127f41d26da023..d8b80df8fc776a7e93c1c0b77f626da93a0a87e4 100644 (file)
--- a/include/llvm/Analysis/CallGraph.h
+++ b/include/llvm/Analysis/CallGraph.h
@@ -53,9 +53,11 @@
 
 #include "llvm/ADT/GraphTraits.h"
 #include "llvm/ADT/STLExtras.h"
+#include "llvm/Function.h"
 #include "llvm/Pass.h"
 #include "llvm/Support/CallSite.h"
-#include "llvm/System/IncludeFile.h"
+#include "llvm/Support/IncludeFile.h"
+#include "llvm/Support/ValueHandle.h"
 #include <map>
 
 namespace llvm {
@@ -136,6 +138,13 @@ public:
   /// not already exist.
   CallGraphNode *getOrInsertFunction(const Function *F);
 
+  /// spliceFunction - Replace the function represented by this node by another.
+  /// This does not rescan the body of the function, so it is suitable when
+  /// splicing the body of one function to another while also updating all
+  /// callers from the old function to the new.
+  ///
+  void spliceFunction(const Function *From, const Function *To);
+
   //===---------------------------------------------------------------------
   // Pass infrastructure interface glue code.
   //
@@ -158,20 +167,27 @@ protected:
 };
 
 //===----------------------------------------------------------------------===//
-// CallGraphNode class definition
+// CallGraphNode class definition.
 //
 class CallGraphNode {
-  Function *F;
-  typedef std::pair<CallSite,CallGraphNode*> CallRecord;
+  friend class CallGraph;
+  
+  AssertingVH<Function> F;
+
+  // CallRecord - This is a pair of the calling instruction (a call or invoke)
+  // and the callgraph node being called.
+public:
+  typedef std::pair<WeakVH, CallGraphNode*> CallRecord;
+private:
   std::vector<CallRecord> CalledFunctions;
   
   /// NumReferences - This is the number of times that this CallGraphNode occurs
   /// in the CalledFunctions array of this or other CallGraphNodes.
   unsigned NumReferences;
 
-  CallGraphNode(const CallGraphNode &);            // DO NOT IMPLEMENT
-  void operator=(const CallGraphNode &);           // DO NOT IMPLEMENT
-  
+  CallGraphNode(const CallGraphNode &) LLVM_DELETED_FUNCTION;
+  void operator=(const CallGraphNode &) LLVM_DELETED_FUNCTION;
+ 
   void DropRef() { --NumReferences; }
   void AddRef() { ++NumReferences; }
 public:
@@ -180,6 +196,9 @@ public:
   
   // CallGraphNode ctor - Create a node for the specified function.
   inline CallGraphNode(Function *f) : F(f), NumReferences(0) {}
+  ~CallGraphNode() {
+    assert(NumReferences == 0 && "Node deleted while references remain");
+  }
   
   //===---------------------------------------------------------------------
   // Accessor methods.
@@ -240,19 +259,25 @@ public:
   /// addCalledFunction - Add a function to the list of functions called by this
   /// one.
   void addCalledFunction(CallSite CS, CallGraphNode *M) {
-    CalledFunctions.push_back(std::make_pair(CS, M));
+    assert(!CS.getInstruction() ||
+           !CS.getCalledFunction() ||
+           !CS.getCalledFunction()->isIntrinsic());
+    CalledFunctions.push_back(std::make_pair(CS.getInstruction(), M));
     M->AddRef();
   }
 
+  void removeCallEdge(iterator I) {
+    I->second->DropRef();
+    *I = CalledFunctions.back();
+    CalledFunctions.pop_back();
+  }
+  
+  
   /// removeCallEdgeFor - This method removes the edge in the node for the
   /// specified call site.  Note that this method takes linear time, so it
   /// should be used sparingly.
   void removeCallEdgeFor(CallSite CS);
 
-  // FIXME: REMOVE THIS WHEN HACK IS REMOVED FROM CGSCCPASSMGR.
-  void removeCallEdgeFor(Instruction *CS);
-
-  
   /// removeAnyCallEdgeTo - This method removes all call edges from this node
   /// to the specified callee function.  This takes more time to execute than
   /// removeCallEdgeTo, so it should not be used unless necessary.
@@ -261,11 +286,17 @@ public:
   /// removeOneAbstractEdgeTo - Remove one edge associated with a null callsite
   /// from this node to the specified callee function.
   void removeOneAbstractEdgeTo(CallGraphNode *Callee);
-
-  /// replaceCallSite - Make the edge in the node for Old CallSite be for
-  /// New CallSite instead.  Note that this method takes linear time, so it
-  /// should be used sparingly.
-  void replaceCallSite(CallSite Old, CallSite New, CallGraphNode *NewCallee);
+  
+  /// replaceCallEdge - This method replaces the edge in the node for the
+  /// specified call site with a new one.  Note that this method takes linear
+  /// time, so it should be used sparingly.
+  void replaceCallEdge(CallSite CS, CallSite NewCS, CallGraphNode *NewNode);
+  
+  /// allReferencesDropped - This is a special function that should only be
+  /// used by the CallGraph class.
+  void allReferencesDropped() {
+    NumReferences = 0;
+  }
 };
 
 //===----------------------------------------------------------------------===//
@@ -278,7 +309,7 @@ public:
 template <> struct GraphTraits<CallGraphNode*> {
   typedef CallGraphNode NodeType;
 
-  typedef std::pair<CallSite, CallGraphNode*> CGNPairTy;
+  typedef CallGraphNode::CallRecord CGNPairTy;
   typedef std::pointer_to_unary_function<CGNPairTy, CallGraphNode*> CGNDerefFun;
 
   static NodeType *getEntryNode(CallGraphNode *CGN) { return CGN; }