Teach SemaChecking::CheckReturnStackAddr about ImplicitCastExprs that convert values to an lvalue. This allows us to warn (again) about returning references to stack variables. (fixes PR 7812).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@110242 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Analysis/stack-addr-ps.cpp b/test/Analysis/stack-addr-ps.cpp
new file mode 100644
index 0000000..593ba1d
--- /dev/null
+++ b/test/Analysis/stack-addr-ps.cpp
@@ -0,0 +1,8 @@
+// RUN: %clang_cc1 -fsyntax-only -fblocks -verify %s
+
+// FIXME: Only the stack-address checking in Sema catches this right now, and
+// the stack analyzer doesn't handle the ImplicitCastExpr (lvalue).
+const int& g() {
+ int s;
+ return s; // expected-warning{{reference to stack memory associated with local variable 's' returned}}
+}