1 files changed, 77 insertions, 0 deletions
diff --git a/clang/test/CodeGenCXX/copy-constructor-elim-2.cpp b/clang/test/CodeGenCXX/copy-constructor-elim-2.cpp
new file mode 100644
index 0000000..9480cbf
--- /dev/null
+++ b/clang/test/CodeGenCXX/copy-constructor-elim-2.cpp
@@ -0,0 +1,77 @@
+// RUN: %clang_cc1 -emit-llvm -o - %s | FileCheck %s
+
+struct A { int x; A(int); ~A(); };
+A f() { return A(0); }
+// CHECK: define void @_Z1fv
+// CHECK: call {{.*}} @_ZN1AC1Ei
+// CHECK-NEXT: ret void
+
+// Verify that we do not elide copies when constructing a base class.
+namespace no_elide_base {
+  struct Base { 
+    Base(const Base&);
+    ~Base();
+  };
+
+  struct Other {
+    operator Base() const;
+  };
+
+  struct Derived : public virtual Base { 
+    Derived(const Other &O);
+  };
+
+  // CHECK: define {{.*}} @_ZN13no_elide_base7DerivedC1ERKNS_5OtherE(%"struct.no_elide_base::Derived"* %this, %"struct.no_elide_base::Other"* %O) unnamed_addr
+  Derived::Derived(const Other &O) 
+    // CHECK: call {{.*}} @_ZNK13no_elide_base5OthercvNS_4BaseEEv
+    // CHECK: call {{.*}} @_ZN13no_elide_base4BaseC2ERKS0_
+    // CHECK: call {{.*}} @_ZN13no_elide_base4BaseD1Ev
+    : Base(O)
+  {
+    // CHECK: ret
+  }
+}
+
+// PR8683.
+
+namespace PR8683 {
+
+struct A {
+  A();
+  A(const A&);
+  A& operator=(const A&);
+};
+
+struct B {
+  A a;
+};
+
+void f() {
+  // Verify that we don't mark the copy constructor in this expression as elidable.
+  // CHECK: call {{.*}} @_ZN6PR86831AC1ERKS0_
+  A a = (B().a);
+}
+
+}
+
+namespace PR12139 {
+  struct A {
+    A() : value(1) { }
+    A(A const &, int value = 2) : value(value) { }
+    int value;
+
+    static A makeA() { A a; a.value = 2; return a; }
+  };
+
+  // CHECK: define i32 @_ZN7PR121394testEv
+  int test() {
+    // CHECK: call void @_ZN7PR121391A5makeAEv
+    // CHECK-NEXT: call void @_ZN7PR121391AC1ERKS0_i
+    A a(A::makeA(), 3);
+    // CHECK-NEXT: getelementptr inbounds
+    // CHECK-NEXT: load
+    // CHECK-NEXT: ret i32
+    return a.value;
+  }
+}
+