Teach -Wuninitialized-experimental about sizeof().

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@124076 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 10 insertions, 0 deletions

diff --git a/lib/Analysis/UninitializedValuesV2.cpp b/lib/Analysis/UninitializedValuesV2.cpp
index dfaff314e2..4c54885413 100644
--- a/lib/Analysis/UninitializedValuesV2.cpp
+++ b/lib/Analysis/UninitializedValuesV2.cpp
@@ -302,6 +302,7 @@ public:
   void VisitUnaryOperator(UnaryOperator *uo);
   void VisitBinaryOperator(BinaryOperator *bo);
   void VisitCastExpr(CastExpr *ce);
+  void VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *se);
 };
 }
 
@@ -435,6 +436,15 @@ void TransferFunctions::VisitCastExpr(clang::CastExpr *ce) {
   Visit(ce->getSubExpr());
 }
 
+void TransferFunctions::VisitSizeOfAlignOfExpr(SizeOfAlignOfExpr *se) {
+  if (se->isSizeOf()) {
+    if (se->getType()->isConstantSizeType())
+      return;
+    // Handle VLAs.
+    Visit(se->getArgumentExpr());
+  }
+}
+
 //------------------------------------------------------------------------====//
 // High-level "driver" logic for uninitialized values analysis.
 //====------------------------------------------------------------------------//