1 files changed, 36 insertions, 0 deletions
diff --git a/test/CodeGenCXX/stack-reuse-miscompile.cpp b/test/CodeGenCXX/stack-reuse-miscompile.cpp
new file mode 100644
index 0000000000000..63d15fd1e8c93
--- /dev/null
+++ b/test/CodeGenCXX/stack-reuse-miscompile.cpp
@@ -0,0 +1,36 @@
+// RUN: %clang -S -target armv7l-unknown-linux-gnueabihf -emit-llvm -O1 -mllvm -disable-llvm-optzns -S %s -o - | FileCheck %s
+
+// This test should not to generate llvm.lifetime.start/llvm.lifetime.end for
+// f function because all temporary objects in this function are used for the
+// final result
+
+class S {
+  char *ptr;
+  unsigned int len;
+};
+
+class T {
+  S left;
+  S right;
+
+public:
+  T(const char s[]);
+  T(S);
+
+  T concat(const T &Suffix) const;
+  const char * str() const;
+};
+
+const char * f(S s)
+{
+// CHECK: [[T1:%.*]] = alloca %class.T, align 4
+// CHECK: [[T2:%.*]] = alloca %class.T, align 4
+// CHECK: [[T3:%.*]] = alloca %class.T, align 4
+// CHECK: [[T4:%.*]] = call %class.T* @_ZN1TC1EPKc(%class.T* [[T1]], i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str, i32 0, i32 0))
+// CHECK: [[T5:%.*]] = call %class.T* @_ZN1TC1E1S(%class.T* [[T2]], [2 x i32] %{{.*}})
+// CHECK: call void @_ZNK1T6concatERKS_(%class.T* sret [[T3]], %class.T* [[T1]], %class.T* dereferenceable(16) [[T2]])
+// CHECK: [[T6:%.*]] = call i8* @_ZNK1T3strEv(%class.T* [[T3]])
+// CHECK: ret i8* [[T6]]
+
+  return T("[").concat(T(s)).str();
+}