Add StringRegion to MemRegions.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@58137 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 27 insertions, 0 deletions

diff --git a/lib/Analysis/MemRegion.cpp b/lib/Analysis/MemRegion.cpp
index 5dad3560f0..f14e0cba44 100644
--- a/lib/Analysis/MemRegion.cpp
+++ b/lib/Analysis/MemRegion.cpp
@@ -25,6 +25,14 @@ void MemSpaceRegion::Profile(llvm::FoldingSetNodeID& ID) const {
   ID.AddInteger((unsigned)getKind());
 }
 
+void StringRegion::ProfileRegion(llvm::FoldingSetNodeID& ID, 
+                                 const StringLiteral* Str, 
+                                 const MemRegion* superRegion) {
+  ID.AddInteger((unsigned) StringRegionKind);
+  ID.AddPointer(Str);
+  ID.AddPointer(superRegion);
+}
+
 void AnonTypedRegion::ProfileRegion(llvm::FoldingSetNodeID& ID, QualType T,
                                     const MemRegion* superRegion) {
   ID.AddInteger((unsigned) AnonTypedRegionKind);
@@ -138,6 +146,25 @@ MemSpaceRegion* MemRegionManager::getUnknownRegion() {
   return LazyAllocate(unknown);
 }
 
+StringRegion* MemRegionManager::getStringRegion(const StringLiteral* Str) {
+  llvm::FoldingSetNodeID ID;
+  MemSpaceRegion* GlobalsR = getGlobalsRegion();
+
+  StringRegion::ProfileRegion(ID, Str, GlobalsR);
+
+  void* InsertPos;
+  MemRegion* data = Regions.FindNodeOrInsertPos(ID, InsertPos);
+  StringRegion* R = cast_or_null<StringRegion>(data);
+
+  if (!R) {
+    R = (StringRegion*) A.Allocate<StringRegion>();
+    new (R) StringRegion(Str, GlobalsR);
+    Regions.InsertNode(R, InsertPos);
+  }
+
+  return R;
+}
+
 VarRegion* MemRegionManager::getVarRegion(const VarDecl* d,
                                           const MemRegion* superRegion) {
   llvm::FoldingSetNodeID ID;