1 files changed, 165 insertions, 0 deletions
diff --git a/clang/test/CodeGen/temporary-lifetime.cpp b/clang/test/CodeGen/temporary-lifetime.cpp
new file mode 100644
index 00000000000..e760cfc10a7
--- /dev/null
+++ b/clang/test/CodeGen/temporary-lifetime.cpp
@@ -0,0 +1,165 @@
+// RUN: %clang_cc1 %s -std=c++11 -O1 -DWITH_DTOR -triple x86_64 -emit-llvm -o - | FileCheck -check-prefix=CHECK-DTOR %s
+// RUN: %clang_cc1 %s -std=c++11 -O1 -triple x86_64 -emit-llvm -o - | FileCheck -check-prefix=CHECK-NO-DTOR %s
+
+struct A {
+  A();
+#ifdef WITH_DTOR
+  ~A();
+#endif
+  char a[1024];
+  operator bool() const;
+};
+
+template <typename T>
+void Foo(T &&);
+
+template <typename T>
+void Bar(T &&);
+
+template <typename T>
+T Baz();
+
+void Test1() {
+  // CHECK-DTOR-LABEL: Test1
+  // CHECK-DTOR: call void @llvm.lifetime.start(i64 1024, i8* %[[ADDR:[0-9]+]])
+  // CHECK-DTOR: call void @_ZN1AC1Ev(%struct.A* nonnull %[[VAR:[^ ]+]])
+  // CHECK-DTOR: call void @_Z3FooIRK1AEvOT_
+  // CHECK-DTOR: call void @_ZN1AD1Ev(%struct.A* nonnull %[[VAR]])
+  // CHECK-DTOR: call void @llvm.lifetime.end(i64 1024, i8* %[[ADDR]])
+  // CHECK-DTOR: call void @llvm.lifetime.start(i64 1024, i8* %[[ADDR:[0-9]+]])
+  // CHECK-DTOR: call void @_ZN1AC1Ev(%struct.A* nonnull %[[VAR:[^ ]+]])
+  // CHECK-DTOR: call void @_Z3FooIRK1AEvOT_
+  // CHECK-DTOR: call void @_ZN1AD1Ev(%struct.A* nonnull %[[VAR]])
+  // CHECK-DTOR: call void @llvm.lifetime.end(i64 1024, i8* %[[ADDR]])
+  // CHECK-DTOR: }
+
+  // CHECK-NO-DTOR-LABEL: Test1
+  // CHECK-NO-DTOR: call void @llvm.lifetime.start(i64 1024, i8* %[[ADDR:[0-9]+]])
+  // CHECK-NO-DTOR: call void @_ZN1AC1Ev(%struct.A* nonnull %[[VAR:[^ ]+]])
+  // CHECK-NO-DTOR: call void @_Z3FooIRK1AEvOT_
+  // CHECK-NO-DTOR: call void @llvm.lifetime.end(i64 1024, i8* %[[ADDR]])
+  // CHECK-NO-DTOR: call void @llvm.lifetime.start(i64 1024, i8* %[[ADDR:[0-9]+]])
+  // CHECK-NO-DTOR: call void @_ZN1AC1Ev(%struct.A* nonnull %[[VAR:[^ ]+]])
+  // CHECK-NO-DTOR: call void @_Z3FooIRK1AEvOT_
+  // CHECK-NO-DTOR: call void @llvm.lifetime.end(i64 1024, i8* %[[ADDR]])
+  // CHECK-NO-DTOR: }
+  {
+    const A &a = A{};
+    Foo(a);
+  }
+  {
+    const A &a = A{};
+    Foo(a);
+  }
+}
+
+void Test2() {
+  // CHECK-DTOR-LABEL: Test2
+  // CHECK-DTOR: call void @llvm.lifetime.start(i64 1024, i8* %[[ADDR1:[0-9]+]])
+  // CHECK-DTOR: call void @_ZN1AC1Ev(%struct.A* nonnull %[[VAR1:[^ ]+]])
+  // CHECK-DTOR: call void @_Z3FooIRK1AEvOT_
+  // CHECK-DTOR: call void @llvm.lifetime.start(i64 1024, i8* %[[ADDR2:[0-9]+]])
+  // CHECK-DTOR: call void @_ZN1AC1Ev(%struct.A* nonnull %[[VAR2:[^ ]+]])
+  // CHECK-DTOR: call void @_Z3FooIRK1AEvOT_
+  // CHECK-DTOR: call void @_ZN1AD1Ev(%struct.A* nonnull %[[VAR2]])
+  // CHECK-DTOR: call void @llvm.lifetime.end(i64 1024, i8* %[[ADDR2]])
+  // CHECK-DTOR: call void @_ZN1AD1Ev(%struct.A* nonnull %[[VAR1]])
+  // CHECK-DTOR: call void @llvm.lifetime.end(i64 1024, i8* %[[ADDR1]])
+  // CHECK-DTOR: }
+
+  // CHECK-NO-DTOR-LABEL: Test2
+  // CHECK-NO-DTOR: call void @llvm.lifetime.start(i64 1024, i8* %[[ADDR1:[0-9]+]])
+  // CHECK-NO-DTOR: call void @_ZN1AC1Ev(%struct.A* nonnull %[[VAR1:[^ ]+]])
+  // CHECK-NO-DTOR: call void @_Z3FooIRK1AEvOT_
+  // CHECK-NO-DTOR: call void @llvm.lifetime.start(i64 1024, i8* %[[ADDR2:[0-9]+]])
+  // CHECK-NO-DTOR: call void @_ZN1AC1Ev(%struct.A* nonnull %[[VAR2:[^ ]+]])
+  // CHECK-NO-DTOR: call void @_Z3FooIRK1AEvOT_
+  // CHECK-NO-DTOR: call void @llvm.lifetime.end(i64 1024, i8* %[[ADDR2]])
+  // CHECK-NO-DTOR: call void @llvm.lifetime.end(i64 1024, i8* %[[ADDR1]])
+  // CHECK-NO-DTOR: }
+  const A &a = A{};
+  Foo(a);
+  const A &b = A{};
+  Foo(b);
+}
+
+void Test3() {
+  // CHECK-DTOR-LABEL: Test3
+  // CHECK-DTOR: entry:
+  // CHECK-DTOR: call void @llvm.lifetime.start
+  // CHECK-DTOR: call void @llvm.lifetime.start
+  // CHECK-DTOR: if.then:
+  // CHECK-DTOR: call void @llvm.lifetime.end
+  // CHECK-DTOR: cleanup{{.*}}:
+  // CHECK-DTOR: call void @llvm.lifetime.end
+  // CHECK-DTOR: cleanup{{.*}}:
+  // CHECK-DTOR: call void @llvm.lifetime.end
+  // CHECK-DTOR: }
+  const A &a = A{};
+  if (const A &b = A(a)) {
+    Foo(b);
+    return;
+  }
+  Bar(a);
+}
+
+void Test4() {
+  // CHECK-DTOR-LABEL: Test4
+  // CHECK-DTOR: entry:
+  // CHECK-DTOR: call void @llvm.lifetime.start
+  // CHECK-DTOR: for.cond.cleanup:
+  // CHECK-DTOR: call void @llvm.lifetime.end
+  // CHECK-DTOR: for.body:
+  // CHECK-DTOR: }
+  for (const A &a = A{}; a;) {
+    Foo(a);
+  }
+}
+
+int Test5() {
+  // CHECK-DTOR-LABEL: Test5
+  // CHECK-DTOR: call void @llvm.lifetime.start
+  // CHECK-DTOR: call i32 @_Z3BazIiET_v()
+  // CHECK-DTOR: store
+  // CHECK-DTOR: call void @_Z3FooIRKiEvOT_
+  // CHECK-DTOR: load
+  // CHECK-DTOR: call void @llvm.lifetime.end
+  // CHECK-DTOR: }
+  const int &a = Baz<int>();
+  Foo(a);
+  return a;
+}
+
+void Test6() {
+  // CHECK-DTOR-LABEL: Test6
+  // CHECK-DTOR: call void @llvm.lifetime.start(i64 {{[0-9]+}}, i8* %[[ADDR:[0-9]+]])
+  // CHECK-DTOR: call i32 @_Z3BazIiET_v()
+  // CHECK-DTOR: store
+  // CHECK-DTOR: call void @_Z3FooIiEvOT_
+  // CHECK-DTOR: call void @llvm.lifetime.end(i64 {{[0-9]+}}, i8* %[[ADDR]])
+  // CHECK-DTOR: call void @llvm.lifetime.start(i64 {{[0-9]+}}, i8* %[[ADDR:[0-9]+]])
+  // CHECK-DTOR: call i32 @_Z3BazIiET_v()
+  // CHECK-DTOR: store
+  // CHECK-DTOR: call void @_Z3FooIiEvOT_
+  // CHECK-DTOR: call void @llvm.lifetime.end(i64 {{[0-9]+}}, i8* %[[ADDR]])
+  // CHECK-DTOR: }
+  Foo(Baz<int>());
+  Foo(Baz<int>());
+}
+
+void Test7() {
+  // CHECK-DTOR-LABEL: Test7
+  // CHECK-DTOR: call void @llvm.lifetime.start(i64 1024, i8* %[[ADDR:[0-9]+]])
+  // CHECK-DTOR: call void @_Z3BazI1AET_v({{.*}} %[[SLOT:[^ ]+]])
+  // CHECK-DTOR: call void @_Z3FooI1AEvOT_({{.*}} %[[SLOT]])
+  // CHECK-DTOR: call void @_ZN1AD1Ev(%struct.A* nonnull %[[SLOT]])
+  // CHECK-DTOR: call void @llvm.lifetime.end(i64 1024, i8* %[[ADDR]])
+  // CHECK-DTOR: call void @llvm.lifetime.start(i64 1024, i8* %[[ADDR:[0-9]+]])
+  // CHECK-DTOR: call void @_Z3BazI1AET_v({{.*}} %[[SLOT:[^ ]+]])
+  // CHECK-DTOR: call void @_Z3FooI1AEvOT_({{.*}} %[[SLOT]])
+  // CHECK-DTOR: call void @_ZN1AD1Ev(%struct.A* nonnull %[[SLOT]])
+  // CHECK-DTOR: call void @llvm.lifetime.end(i64 1024, i8* %[[ADDR]])
+  // CHECK-DTOR: }
+  Foo(Baz<A>());
+  Foo(Baz<A>());
+}