xref: /aosp_15_r20/external/clang/test/CodeGenCXX/member-init-anon-union.cpp (revision 67e74705e28f6214e480b399dd47ea732279e315) 
1*67e74705SXin Li // RUN: %clang_cc1 %s -std=c++11 -triple x86_64-linux-gnu -emit-llvm -o - | FileCheck %s
2*67e74705SXin Li 
3*67e74705SXin Li // PR10531.
4*67e74705SXin Li 
5*67e74705SXin Li int make_a();
6*67e74705SXin Li 
7*67e74705SXin Li static union {
8*67e74705SXin Li   int a = make_a();
9*67e74705SXin Li   char *b;
10*67e74705SXin Li };
11*67e74705SXin Li 
f()12*67e74705SXin Li int f() { return a; }
13*67e74705SXin Li 
14*67e74705SXin Li // CHECK-LABEL: define internal void @__cxx_global_var_init
15*67e74705SXin Li // CHECK-NOT: }
16*67e74705SXin Li // CHECK: call {{.*}}@"[[CONSTRUCT_GLOBAL:.*]]C1Ev"
17*67e74705SXin Li 
18*67e74705SXin Li 
g()19*67e74705SXin Li int g() {
20*67e74705SXin Li   union {
21*67e74705SXin Li     int a;
22*67e74705SXin Li     int b = 81;
23*67e74705SXin Li   };
24*67e74705SXin Li   // CHECK-LABEL: define {{.*}}_Z1gv
25*67e74705SXin Li   // CHECK-NOT: }
26*67e74705SXin Li   // CHECK: call {{.*}}@"[[CONSTRUCT_LOCAL:.*]]C1Ev"
27*67e74705SXin Li   return b;
28*67e74705SXin Li }
29*67e74705SXin Li 
30*67e74705SXin Li struct A {
31*67e74705SXin Li   A();
32*67e74705SXin Li };
33*67e74705SXin Li union B {
34*67e74705SXin Li   int k;
35*67e74705SXin Li   struct {
36*67e74705SXin Li     A x;
37*67e74705SXin Li     int y = 123;
38*67e74705SXin Li   };
B()39*67e74705SXin Li   B() {}
B(int n)40*67e74705SXin Li   B(int n) : k(n) {}
41*67e74705SXin Li };
42*67e74705SXin Li 
43*67e74705SXin Li B b1;
44*67e74705SXin Li B b2(0);
45*67e74705SXin Li 
46*67e74705SXin Li // CHECK: define {{.*}}@"[[CONSTRUCT_GLOBAL]]C2Ev"
47*67e74705SXin Li // CHECK-NOT: }
48*67e74705SXin Li // CHECK: call {{.*}}@_Z6make_a
49*67e74705SXin Li 
50*67e74705SXin Li // CHECK: define {{.*}}@"[[CONSTRUCT_LOCAL]]C2Ev"
51*67e74705SXin Li // CHECK-NOT: }
52*67e74705SXin Li // CHECK: store i32 81
53*67e74705SXin Li 
54*67e74705SXin Li // CHECK-LABEL: define {{.*}} @_ZN1BC2Ev(
55*67e74705SXin Li // CHECK: call void @_ZN1AC1Ev(
56*67e74705SXin Li // CHECK: store i32 123,
57*67e74705SXin Li // CHECK: }
58*67e74705SXin Li 
59*67e74705SXin Li // CHECK-LABEL: define {{.*}} @_ZN1BC2Ei(
60*67e74705SXin Li // CHECK-NOT: call void @_ZN1AC1Ev(
61*67e74705SXin Li // CHECK-NOT: store i32 123,
62*67e74705SXin Li // CHECK: store i32 %
63*67e74705SXin Li // CHECK-NOT: call void @_ZN1AC1Ev(
64*67e74705SXin Li // CHECK-NOT: store i32 123,
65*67e74705SXin Li // CHECK: }
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