Sanitize upcasts and conversion to virtual base.

This change adds UBSan check to upcasts. Namely, when we
perform derived-to-base conversion, we:
1) check that the pointer-to-derived has suitable alignment
   and underlying storage, if this pointer is non-null.
2) if vptr-sanitizer is enabled, and we perform conversion to
   virtual base, we check that pointer-to-derived has a matching vptr.

llvm-svn: 219642

1 files changed, 3 insertions, 3 deletions

diff --git a/clang/lib/CodeGen/CGExprScalar.cpp b/clang/lib/CodeGen/CGExprScalar.cpp
index 5ca2414efa7..8d8fd39cb01 100644
--- a/clang/lib/CodeGen/CGExprScalar.cpp
+++ b/clang/lib/CodeGen/CGExprScalar.cpp
@@ -1388,9 +1388,9 @@ Value *ScalarExprEmitter::VisitCastExpr(CastExpr *CE) {
       E->getType()->getPointeeCXXRecordDecl();
     assert(DerivedClassDecl && "DerivedToBase arg isn't a C++ object pointer!");
 
-    return CGF.GetAddressOfBaseClass(Visit(E), DerivedClassDecl,
-                                     CE->path_begin(), CE->path_end(),
-                                     ShouldNullCheckClassCastValue(CE));
+    return CGF.GetAddressOfBaseClass(
+        Visit(E), DerivedClassDecl, CE->path_begin(), CE->path_end(),
+        ShouldNullCheckClassCastValue(CE), CE->getExprLoc());
   }
   case CK_Dynamic: {
     Value *V = Visit(const_cast<Expr*>(E));