1// RUN: not %clang_cc1 -verify -triple x86_64-apple-darwin -emit-llvm -o - %s | FileCheck %s
2
3// CHECK: @a = global i32 10
4int a = 10;
5// CHECK: @ar = constant i32* @a
6int &ar = a;
7
8void f();
9// CHECK: @fr = constant void ()* @_Z1fv
10void (&fr)() = f;
11
12struct S { int& a; };
13// CHECK: @s = global %struct.S { i32* @a }
14S s = { a };
15
16// PR5581
17namespace PR5581 {
18class C {
19public:
20  enum { e0, e1 };
21  unsigned f;
22};
23
24// CHECK: @_ZN6PR55812g0E = global %"class.PR5581::C" { i32 1 }
25C g0 = { C::e1 };
26}
27
28namespace test2 {
29  struct A {
30    static const double d = 1.0;
31    static const float f = d / 2;
32    static int g();
33  } a;
34
35  // CHECK: @_ZN5test22t0E = global double {{1\.0+e\+0+}}, align 8
36  // CHECK: @_ZN5test22t1E = global [2 x double] [double {{1\.0+e\+0+}}, double {{5\.0+e-0*}}1], align 16
37  // CHECK: @_ZN5test22t2E = global double* @_ZN5test21A1d
38  // CHECK: @_ZN5test22t3E = global {{.*}} @_ZN5test21A1g
39  double t0 = A::d;
40  double t1[] = { A::d, A::f };
41  const double *t2 = &a.d;
42  int (*t3)() = &a.g;
43}
44
45// We don't expect to fold this in the frontend, but make sure it doesn't crash.
46// CHECK: @PR9558 = global float 0.000000e+0
47float PR9558 = reinterpret_cast<const float&>("asd");
48
49// An initialized const automatic variable cannot be promoted to a constant
50// global if it has a mutable member.
51struct MutableMember {
52  mutable int n;
53};
54int writeToMutable() {
55  // CHECK-NOT: {{.*}}MM{{.*}} = {{.*}}constant
56  const MutableMember MM = { 0 };
57  return ++MM.n;
58}
59
60// Make sure we don't try to fold this in the frontend; the backend can't
61// handle it.
62// CHECK: @PR11705 = global i128 0
63__int128_t PR11705 = (__int128_t)&PR11705;
64
65// Make sure we don't try to fold this either.
66// CHECK: @_ZZ23UnfoldableAddrLabelDiffvE1x = internal global i128 0
67void UnfoldableAddrLabelDiff() { static __int128_t x = (long)&&a-(long)&&b; a:b:return;}
68
69// But make sure we do fold this.
70// CHECK: @_ZZ21FoldableAddrLabelDiffvE1x = internal global i64 sub (i64 ptrtoint (i8* blockaddress(@_Z21FoldableAddrLabelDiffv
71void FoldableAddrLabelDiff() { static long x = (long)&&a-(long)&&b; a:b:return;}
72
73// CHECK: @i = constant i32* bitcast (float* @PR9558 to i32*)
74int &i = reinterpret_cast<int&>(PR9558);
75
76int arr[2];
77// CHECK: @pastEnd = constant i32* bitcast (i8* getelementptr (i8* bitcast ([2 x i32]* @arr to i8*), i64 8) to i32*)
78int &pastEnd = arr[2];
79