clang/test/CodeGenCXX/global-dtor-no-atexit.cpp

   1 // RUN: %clang_cc1 -triple x86_64 %s -fno-use-cxa-atexit -emit-llvm -o - | FileCheck %s
   2
   3 // PR7097
   4 // RUN: %clang_cc1 -triple x86_64 %s -fno-use-cxa-atexit -mconstructor-aliases -emit-llvm -o - | FileCheck %s
   5
   6 // CHECK:      call void @_ZN1AC1Ev(ptr {{[^,]*}} @a)
   7 // CHECK-NEXT: call i32 @atexit(ptr @__dtor_a)
   8 // CHECK:      define internal void @__dtor_a() [[NUW:#[0-9]+]]
   9 // CHECK:      call void @_ZN1AD1Ev(ptr @a)
  10
  11 // CHECK:      call void @_ZN1AC1Ev(ptr {{[^,]*}} @b)
  12 // CHECK-NEXT: call i32 @atexit(ptr @__dtor_b)
  13 // CHECK:      define internal void @__dtor_b() [[NUW]]
  14 // CHECK:      call void @_ZN1AD1Ev(ptr @b)
  15
  16 class A {
  17 public:
  18   A();
  19   ~A();
  20 };
  21
  22 A a, b;
  23
  24 // PR9593
  25 // CHECK-LABEL:      define{{.*}} void @_Z4funcv()
  26 // CHECK:      call i32 @__cxa_guard_acquire(ptr @_ZGVZ4funcvE2a1)
  27 // CHECK:      call void @_ZN1AC1Ev(ptr {{[^,]*}} @_ZZ4funcvE2a1)
  28 // CHECK-NEXT: call i32 @atexit(ptr @__dtor__ZZ4funcvE2a1)
  29 // CHECK-NEXT: call void @__cxa_guard_release(ptr @_ZGVZ4funcvE2a1)
  30
  31 // CHECK:      call i32 @__cxa_guard_acquire(ptr @_ZGVZ4funcvE2a2)
  32 // CHECK:      call void @_ZN1AC1Ev(ptr {{[^,]*}} @_ZZ4funcvE2a2)
  33 // CHECK-NEXT: call i32 @atexit(ptr @__dtor__ZZ4funcvE2a2)
  34 // CHECK-NEXT: call void @__cxa_guard_release(ptr @_ZGVZ4funcvE2a2)
  35
  36 // CHECK:      define internal void @__dtor__ZZ4funcvE2a1() [[NUW]]
  37 // CHECK:      call void @_ZN1AD1Ev(ptr @_ZZ4funcvE2a1)
  38
  39 // CHECK:      define internal void @__dtor__ZZ4funcvE2a2() [[NUW]]
  40 // CHECK:      call void @_ZN1AD1Ev(ptr @_ZZ4funcvE2a2)
  41
  42 void func() {
  43   static A a1, a2;
  44 }
  45
  46 // CHECK: attributes [[NUW]] = { noinline nounwind{{.*}} }