Add initial support for a globals graph

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4656 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 8 insertions, 26 deletions

diff --git a/lib/Analysis/DataStructure/DataStructure.cpp b/lib/Analysis/DataStructure/DataStructure.cpp
index 6380a4967e..584031bade 100644
--- a/lib/Analysis/DataStructure/DataStructure.cpp
+++ b/lib/Analysis/DataStructure/DataStructure.cpp
@@ -501,14 +501,14 @@ Function &DSCallSite::getCaller() const {
 // DSGraph Implementation
 //===----------------------------------------------------------------------===//
 
-DSGraph::DSGraph(const DSGraph &G) : Func(G.Func) {
+DSGraph::DSGraph(const DSGraph &G) : Func(G.Func), GlobalsGraph(0) {
   std::map<const DSNode*, DSNodeHandle> NodeMap;
   RetNode = cloneInto(G, ScalarMap, NodeMap);
 }
 
 DSGraph::DSGraph(const DSGraph &G,
                  std::map<const DSNode*, DSNodeHandle> &NodeMap)
-  : Func(G.Func) {
+  : Func(G.Func), GlobalsGraph(0) {
   RetNode = cloneInto(G, ScalarMap, NodeMap);
 }
 
@@ -1056,28 +1056,6 @@ void DSGraph::maskNodeTypes(unsigned char Mask) {
 // GlobalDSGraph Implementation
 //===----------------------------------------------------------------------===//
 
-GlobalDSGraph::GlobalDSGraph() : DSGraph(*(Function*)0, this) {
-}
-
-GlobalDSGraph::~GlobalDSGraph() {
-  assert(Referrers.size() == 0 &&
-         "Deleting global graph while references from other graphs exist");
-}
-
-void GlobalDSGraph::addReference(const DSGraph* referrer) {
-  if (referrer != this)
-    Referrers.insert(referrer);
-}
-
-void GlobalDSGraph::removeReference(const DSGraph* referrer) {
-  if (referrer != this) {
-    assert(Referrers.find(referrer) != Referrers.end() && "This is very bad!");
-    Referrers.erase(referrer);
-    if (Referrers.size() == 0)
-      delete this;
-  }
-}
-
 #if 0
 // Bits used in the next function
 static const char ExternalTypeBits = DSNode::GlobalNode | DSNode::HeapNode;
diff --git a/lib/Analysis/DataStructure/Local.cpp b/lib/Analysis/DataStructure/Local.cpp
index 224ec4ab9c..0c0c6afd88 100644
--- a/lib/Analysis/DataStructure/Local.cpp
+++ b/lib/Analysis/DataStructure/Local.cpp
@@ -131,7 +131,7 @@ namespace {
 //===----------------------------------------------------------------------===//
 // DSGraph constructor - Simply use the GraphBuilder to construct the local
 // graph.
-DSGraph::DSGraph(Function &F) : Func(&F) {
+DSGraph::DSGraph(Function &F, DSGraph *GG) : Func(&F), GlobalsGraph(GG) {
   // Use the graph builder to construct the local version of the graph
   GraphBuilder B(*this, Nodes, RetNode, ScalarMap, FunctionCalls);
   markIncompleteNodes();
@@ -416,12 +416,16 @@ void LocalDataStructures::releaseMemory() {
   // Empty map so next time memory is released, data structures are not
   // re-deleted.
   DSInfo.clear();
+  delete GlobalsGraph;
+  GlobalsGraph = 0;
 }
 
 bool LocalDataStructures::run(Module &M) {
+  GlobalsGraph = new DSGraph();
+
   // Calculate all of the graphs...
   for (Module::iterator I = M.begin(), E = M.end(); I != E; ++I)
     if (!I->isExternal())
-      DSInfo.insert(std::make_pair(I, new DSGraph(*I)));
+      DSInfo.insert(std::make_pair(I, new DSGraph(*I, GlobalsGraph)));
   return false;
 }