Region store: when casting VarRegions, if the cast-to pointee type is

incomplete, do not compute its size and return the original region.

llvm-svn: 71213

1 files changed, 8 insertions, 0 deletions

diff --git a/clang/lib/Analysis/RegionStore.cpp b/clang/lib/Analysis/RegionStore.cpp
index 32226af98f0..7f103dfab25 100644
--- a/clang/lib/Analysis/RegionStore.cpp
+++ b/clang/lib/Analysis/RegionStore.cpp
@@ -668,6 +668,14 @@ RegionStoreManager::CastRegion(const GRState* state, const MemRegion* R,
   // VarRegion.
   if (isa<VarRegion>(R) || isa<ElementRegion>(R) || isa<FieldRegion>(R)
       || isa<ObjCIvarRegion>(R) || isa<CompoundLiteralRegion>(R)) {
+    // If the pointee type is incomplete, do not compute its size, and return
+    // the original region.
+    if (const RecordType *RT = dyn_cast<RecordType>(PointeeTy.getTypePtr())) {
+      const RecordDecl *D = RT->getDecl();
+      if (!D->getDefinition(getContext()))
+        return CastResult(state, R);
+    }
+
     QualType ObjTy = cast<TypedRegion>(R)->getRValueType(getContext());
     uint64_t PointeeTySize = getContext().getTypeSize(PointeeTy);
     uint64_t ObjTySize = getContext().getTypeSize(ObjTy);