[clang] [analyzer] Use dynamic type when invalidating by a member function call (PR #111138)

[Gábor Horváth via cfe-commits]

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@@ -748,6 +747,22 @@ SVal CXXInstanceCall::getCXXThisVal() const {
   return ThisVal;
 }
 
+const CXXRecordDecl *CXXInstanceCall::getDeclForDynamicType() const {
+  const MemRegion *R = getCXXThisVal().getAsRegion();
+  if (!R)
+    return nullptr;
+
+  DynamicTypeInfo DynType = getDynamicTypeInfo(getState(), R);
+  if (!DynType.isValid())
+    return nullptr;
+
+  QualType Ty = DynType.getType()->getPointeeType();
+  if (Ty.isNull())
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Xazax-hun wrote:

Previously we had an assertion here. Is this invariant of "DynamicTypeInfo" is not always a pointer not actually true?

https://github.com/llvm/llvm-project/pull/111138