Remove support for the MultiObject flag, which was fundamentally broken

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6840 91177308-0d34-0410-b5e6-96231b3b80d8

4 files changed, 3 insertions, 14 deletions

diff --git a/lib/Analysis/DataStructure/DataStructure.cpp b/lib/Analysis/DataStructure/DataStructure.cpp
index 9e00860..2f64eb0 100644
--- a/lib/Analysis/DataStructure/DataStructure.cpp
+++ b/lib/Analysis/DataStructure/DataStructure.cpp
@@ -68,12 +68,6 @@ void DSNode::assertOK() const {
           Ty == Type::VoidTy && (Size == 0 ||
                                  (NodeType & DSNode::Array))) &&
          "Node not OK!");
-
-  // Check to ensure that the multiobject constraints are met...
-  unsigned Comp = NodeType & DSNode::Composition;
-  assert((NodeType & DSNode::MultiObject) || 
-         Comp == 0 || Comp == DSNode::AllocaNode || Comp == DSNode::HeapNode ||
-         Comp == DSNode::GlobalNode || Comp == DSNode::UnknownNode);
 }
 
 /// forwardNode - Mark this node as being obsolete, and all references to it
@@ -103,8 +97,6 @@ void DSNode::addGlobal(GlobalValue *GV) {
   if (I == Globals.end() || *I != GV) {
     //assert(GV->getType()->getElementType() == Ty);
     Globals.insert(I, GV);
-    if (NodeType & DSNode::Composition)
-      NodeType |= DSNode::MultiObject;
     NodeType |= GlobalNode;
   }
 }
@@ -483,9 +475,6 @@ void DSNode::MergeNodes(DSNodeHandle& CurNodeH, DSNodeHandle& NH) {
   assert(!CurNodeH.getNode()->isDeadNode());
 
   // Merge the NodeType information...
-  if ((CurNodeH.getNode()->NodeType & DSNode::Composition) != 0 && 
-      (N->NodeType & DSNode::Composition) != 0)
-    N->NodeType |= DSNode::MultiObject;   // Multiple composition -> multiobject
   CurNodeH.getNode()->NodeType |= N->NodeType;
 
   // Start forwarding to the new node!
diff --git a/lib/Analysis/DataStructure/DataStructureAA.cpp b/lib/Analysis/DataStructure/DataStructureAA.cpp
index d7c40c6..3c89e6d 100644
--- a/lib/Analysis/DataStructure/DataStructureAA.cpp
+++ b/lib/Analysis/DataStructure/DataStructureAA.cpp
@@ -96,8 +96,8 @@ AliasAnalysis::AliasResult DSAA::alias(const Value *V1, unsigned V1Size,
 
           // Both point to the same node and same offset, and there is only one
           // physical memory object represented in the node, return must alias.
-          if (O1 == O2 && !N1->isMultiObject())
-            return MustAlias; // Exactly the same object & offset
+          //if (O1 == O2 && !N1->isMultiObject())
+          //  return MustAlias; // Exactly the same object & offset
 
           // See if they point to different offsets...  if so, we may be able to
           // determine that they do not alias...
diff --git a/lib/Analysis/DataStructure/Printer.cpp b/lib/Analysis/DataStructure/Printer.cpp
index 9bde0b7..50d8933 100644
--- a/lib/Analysis/DataStructure/Printer.cpp
+++ b/lib/Analysis/DataStructure/Printer.cpp
@@ -47,7 +47,6 @@ static std::string getCaption(const DSNode *N, const DSGraph *G) {
     if (NodeType & DSNode::Incomplete ) OS << "I";
     if (NodeType & DSNode::Modified   ) OS << "M";
     if (NodeType & DSNode::Read       ) OS << "R";
-    if (NodeType & DSNode::MultiObject) OS << "m";
 #ifndef NDEBUG
     if (NodeType & DSNode::DEAD       ) OS << "<dead>";
 #endif
diff --git a/lib/Analysis/DataStructure/TopDownClosure.cpp b/lib/Analysis/DataStructure/TopDownClosure.cpp
index def5492..3138ada 100644
--- a/lib/Analysis/DataStructure/TopDownClosure.cpp
+++ b/lib/Analysis/DataStructure/TopDownClosure.cpp
@@ -45,6 +45,7 @@ bool TDDataStructures::run(Module &M) {
 // has no way to extend the lifetime of the pass, which screws up ds-aa.
 //
 void TDDataStructures::releaseMyMemory() {
+  return;
   for (hash_map<const Function*, DSGraph*>::iterator I = DSInfo.begin(),
          E = DSInfo.end(); I != E; ++I)
     delete I->second;