Revert r82939. We can only not special case FieldRegions when the super region has also been invalidated.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@83040 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 5 insertions, 9 deletions

diff --git a/lib/Analysis/RegionStore.cpp b/lib/Analysis/RegionStore.cpp
index 5d3fa7292b..da04d68dcf 100644
--- a/lib/Analysis/RegionStore.cpp
+++ b/lib/Analysis/RegionStore.cpp
@@ -514,21 +514,17 @@ const GRState *RegionStoreManager::InvalidateRegion(const GRState *state,
       continue;
     }
     
+    // FIXME: Special case FieldRegion/ElementRegion for more
+    // efficient invalidation.  We don't need to conjure symbols for
+    // these regions in all cases.
+    
     // Get the old binding.  Is it a region?  If so, add it to the worklist.
     if (const SVal *OldV = B.lookup(R)) {
       if (const MemRegion *RV = OldV->getAsRegion())
         WorkList.push_back(RV);
     }
     
-    if (isa<FieldRegion>(R) || isa<ElementRegion>(R) || isa<ObjCIvarRegion>(R)){
-      // For fields and elements, only remove the old binding.  The super
-      // region will get set with a default value from which we can lazily
-      // derive a new symbolic value.
-      B = RBFactory.Remove(B, R);
-      continue;
-    }
-    
-    // Invalidate the binding by conjuring a new symbol.
+    // Invalidate the binding.
     DefinedOrUnknownSVal V = ValMgr.getConjuredSymbolVal(R, Ex, T, Count);
     assert(SymbolManager::canSymbolicate(T) || V.isUnknown());
     B = RBFactory.Add(B, R, V);