clang/test/CodeGenCXX/dllimport-memptr-global.cpp

   1 // Also check that -Wglobal-constructors does the right thing. Strictly
   2 // speaking, this is a Sema test, but this avoids test case duplication.
   3 // RUN: %clang_cc1 -Wglobal-constructors %s -verify -triple i686-windows-msvc -fms-extensions -std=c++11
   4 //
   5 // RUN: %clang_cc1 %s -emit-llvm -o - -triple i686-windows-msvc -fms-extensions -std=c++11 | FileCheck %s
   6
   7 struct __declspec(dllimport) Single {
   8   void nonvirt();
   9   virtual void virt();
  10 };
  11
  12 struct A { int a; };
  13 struct B { int b; };
  14 struct __declspec(dllimport) Multi : A, B {
  15   void nonvirt();
  16   virtual void virt();
  17 };
  18
  19 struct __declspec(dllimport) Virtual : virtual A {
  20   void nonvirt();
  21   virtual void virt();
  22 };
  23
  24 struct General;
  25 static_assert(sizeof(void (General::*)()) == 16, "force general memptr model");
  26 struct __declspec(dllimport) General {
  27   void nonvirt();
  28   virtual void virt();
  29 };
  30
  31 auto mp_single_nv = &Single::nonvirt; // expected-warning {{global constructor}}
  32 auto mp_multi_nv = &Multi::nonvirt; // expected-warning {{global constructor}}
  33 auto mp_virtual_nv = &Virtual::nonvirt; // expected-warning {{global constructor}}
  34 auto mp_general_nv = &General::nonvirt; // expected-warning {{global constructor}}
  35
  36 auto mp_single_v = &Single::virt;
  37 auto mp_multi_v = &Multi::virt;
  38 auto mp_virtual_v = &Virtual::virt;
  39 auto mp_general_v = &General::virt;
  40
  41 // All of the non-virtual globals need dynamic initializers.
  42
  43 // CHECK: @"?mp_single_nv@@3P8Single@@AEXXZQ1@" = dso_local global ptr null, align 4
  44 // CHECK: @"?mp_multi_nv@@3P8Multi@@AEXXZQ1@" = dso_local global { ptr, i32 } zeroinitializer, align 4
  45 // CHECK: @"?mp_virtual_nv@@3P8Virtual@@AEXXZQ1@" = dso_local global { ptr, i32, i32 } zeroinitializer, align 4
  46 // CHECK: @"?mp_general_nv@@3P8General@@AEXXZQ1@" = dso_local global { ptr, i32, i32, i32 } zeroinitializer, align 4
  47
  48 // CHECK: @"?mp_single_v@@3P8Single@@AEXXZQ1@" = dso_local global ptr @"??_9Single@@$BA@AE", align 4
  49 // CHECK: @"?mp_multi_v@@3P8Multi@@AEXXZQ1@" = dso_local global { ptr, i32 } { ptr @"??_9Multi@@$BA@AE", i32 0 }, align 4
  50 // CHECK: @"?mp_virtual_v@@3P8Virtual@@AEXXZQ1@" = dso_local global { ptr, i32, i32 } { ptr @"??_9Virtual@@$BA@AE", i32 0, i32 0 }, align 4
  51 // CHECK: @"?mp_general_v@@3P8General@@AEXXZQ1@" = dso_local global { ptr, i32, i32, i32 } { ptr @"??_9General@@$BA@AE", i32 0, i32 0, i32 0 }, align 4
  52
  53 // CHECK: define internal void @_GLOBAL__sub_I{{.*}}() {{.*}} {
  54 // CHECK:   call void @"??__Emp_single_nv@@YAXXZ"()
  55 // CHECK:   call void @"??__Emp_multi_nv@@YAXXZ"()
  56 // CHECK:   call void @"??__Emp_virtual_nv@@YAXXZ"()
  57 // CHECK:   call void @"??__Emp_general_nv@@YAXXZ"()
  58 // CHECK: }