Add ElementRegion to represent memory chunks for array elements.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57891 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/MemRegion.cpp b/lib/Analysis/MemRegion.cpp
index d8efef2..cae053f 100644
--- a/lib/Analysis/MemRegion.cpp
+++ b/lib/Analysis/MemRegion.cpp
@@ -65,6 +65,16 @@
SymbolicRegion::ProfileRegion(ID, sym);
}
+void ElementRegion::ProfileRegion(llvm::FoldingSetNodeID& ID, SVal Idx,
+ const MemRegion* superRegion) {
+ ID.AddInteger(MemRegion::ElementRegionKind);
+ ID.AddPointer(superRegion);
+ Idx.Profile(ID);
+}
+
+void ElementRegion::Profile(llvm::FoldingSetNodeID& ID) const {
+ ElementRegion::ProfileRegion(ID, Index, superRegion);
+}
//===----------------------------------------------------------------------===//
// Region pretty-printing.
//===----------------------------------------------------------------------===//
@@ -141,6 +151,24 @@
return R;
}
+ElementRegion* MemRegionManager::getElementRegion(SVal Idx,
+ const MemRegion* superRegion){
+ llvm::FoldingSetNodeID ID;
+ ElementRegion::ProfileRegion(ID, Idx, superRegion);
+
+ void* InsertPos;
+ MemRegion* data = Regions.FindNodeOrInsertPos(ID, InsertPos);
+ ElementRegion* R = cast_or_null<ElementRegion>(data);
+
+ if (!R) {
+ R = (ElementRegion*) A.Allocate<ElementRegion>();
+ new (R) ElementRegion(Idx, superRegion);
+ Regions.InsertNode(R, InsertPos);
+ }
+
+ return R;
+}
+
/// getSymbolicRegion - Retrieve or create a "symbolic" memory region.
SymbolicRegion* MemRegionManager::getSymbolicRegion(const SymbolID sym) {