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      1 // RUN: %clang_cc1 -triple armv7-none-eabi -emit-llvm -o - %s | FileCheck %s
      2 
      3 struct A { int x; A(int); ~A(); };
      4 A f() { return A(0); }
      5 // CHECK-LABEL: define void @_Z1fv
      6 // CHECK: call {{.*}} @_ZN1AC1Ei
      7 // CHECK-NEXT: ret void
      8 
      9 // Verify that we do not elide copies when constructing a base class.
     10 namespace no_elide_base {
     11   struct Base {
     12     Base(const Base&);
     13     ~Base();
     14   };
     15 
     16   struct Other {
     17     operator Base() const;
     18   };
     19 
     20   struct Derived : public virtual Base {
     21     Derived(const Other &O);
     22   };
     23 
     24   // CHECK: define {{.*}} @_ZN13no_elide_base7DerivedC1ERKNS_5OtherE(%"struct.no_elide_base::Derived"* returned %this, %"struct.no_elide_base::Other"* dereferenceable({{[0-9]+}}) %O) unnamed_addr
     25   Derived::Derived(const Other &O)
     26     // CHECK: call {{.*}} @_ZNK13no_elide_base5OthercvNS_4BaseEEv
     27     // CHECK: call {{.*}} @_ZN13no_elide_base4BaseC2ERKS0_
     28     // CHECK: call {{.*}} @_ZN13no_elide_base4BaseD1Ev
     29     : Base(O)
     30   {
     31     // CHECK: ret
     32   }
     33 }
     34 
     35 // PR8683.
     36 
     37 namespace PR8683 {
     38 
     39 struct A {
     40   A();
     41   A(const A&);
     42   A& operator=(const A&);
     43 };
     44 
     45 struct B {
     46   A a;
     47 };
     48 
     49 void f() {
     50   // Verify that we don't mark the copy constructor in this expression as elidable.
     51   // CHECK: call {{.*}} @_ZN6PR86831AC1ERKS0_
     52   A a = (B().a);
     53 }
     54 
     55 }
     56 
     57 namespace PR12139 {
     58   struct A {
     59     A() : value(1) { }
     60     A(A const &, int value = 2) : value(value) { }
     61     int value;
     62 
     63     static A makeA() { A a; a.value = 2; return a; }
     64   };
     65 
     66   // CHECK-LABEL: define i32 @_ZN7PR121394testEv
     67   int test() {
     68     // CHECK: call void @_ZN7PR121391A5makeAEv
     69     // CHECK-NEXT: call %"struct.PR12139::A"* @_ZN7PR121391AC1ERKS0_i
     70     A a(A::makeA(), 3);
     71     // CHECK-NEXT: getelementptr inbounds
     72     // CHECK-NEXT: load
     73     // CHECK-NEXT: ret i32
     74     return a.value;
     75   }
     76 }
     77