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// RUN: %clang_cc1 -no-opaque-pointers -triple x86_64-pc-linux -emit-llvm -o - %s | FileCheck %s
// RUN: %clang_cc1 -no-opaque-pointers -triple x86_64-apple-darwin -emit-llvm -o - %s | \
// RUN: FileCheck --check-prefix=MACHO %s
// CHECK: @_ZN5test11A1aE ={{.*}} constant i32 10, align 4
// CHECK: @_ZN5test212_GLOBAL__N_11AIiE1xE = internal global i32 0, align 4
// CHECK: @_ZN5test31AIiE1xE = weak_odr global i32 0, comdat, align 4
// CHECK: @_ZGVN5test31AIiE1xE = weak_odr global i64 0, comdat($_ZN5test31AIiE1xE)
// MACHO: @_ZGVN5test31AIiE1xE = weak_odr global i64 0
// MACHO-NOT: comdat
// CHECK: _ZN5test51U2k0E ={{.*}} global i32 0
// CHECK: _ZN5test51U2k1E ={{.*}} global i32 0
// CHECK: _ZN5test51U2k2E ={{.*}} constant i32 76
// CHECK-NOT: test51U2k3E
// CHECK-NOT: test51U2k4E
// PR5564.
namespace test1 {
struct A {
static const int a = 10;
};
const int A::a;
struct S {
static int i;
};
void f() {
int a = S::i;
}
}
// Test that we don't use guards for initializing template static data
// members with internal linkage.
namespace test2 {
int foo();
namespace {
template <class T> struct A {
static int x;
};
template <class T> int A<T>::x = foo();
template struct A<int>;
}
// CHECK-LABEL: define internal void @__cxx_global_var_init()
// CHECK: [[TMP:%.*]] = call noundef i32 @_ZN5test23fooEv()
// CHECK-NEXT: store i32 [[TMP]], i32* @_ZN5test212_GLOBAL__N_11AIiE1xE, align 4
// CHECK-NEXT: ret void
}
// Test that we don't use threadsafe statics when initializing
// template static data members.
namespace test3 {
int foo();
template <class T> struct A {
static int x;
};
template <class T> int A<T>::x = foo();
template struct A<int>;
// CHECK-LABEL: define internal void @__cxx_global_var_init.1() {{.*}} comdat($_ZN5test31AIiE1xE)
// MACHO-LABEL: define internal void @__cxx_global_var_init.1()
// MACHO-NOT: comdat
// CHECK: [[GUARDBYTE:%.*]] = load i8, i8* bitcast (i64* @_ZGVN5test31AIiE1xE to i8*)
// CHECK-NEXT: [[UNINITIALIZED:%.*]] = icmp eq i8 [[GUARDBYTE]], 0
// CHECK-NEXT: br i1 [[UNINITIALIZED]]
// CHECK: [[TMP:%.*]] = call noundef i32 @_ZN5test33fooEv()
// CHECK-NEXT: store i32 [[TMP]], i32* @_ZN5test31AIiE1xE, align 4
// CHECK-NEXT: store i8 1, i8* bitcast (i64* @_ZGVN5test31AIiE1xE to i8*)
// CHECK-NEXT: br label
// CHECK: ret void
}
// Test that we can fold member lookup expressions which resolve to static data
// members.
namespace test4 {
struct A {
static const int n = 76;
};
int f(A *a) {
// CHECK-LABEL: define{{.*}} i32 @_ZN5test41fEPNS_1AE
// CHECK: ret i32 76
return a->n;
}
}
// Test that static data members in unions behave properly.
namespace test5 {
union U {
static int k0;
static const int k1;
static const int k2 = 76;
static const int k3;
static const int k4 = 81;
};
int U::k0;
const int U::k1 = (k0 = 9, 42);
const int U::k2;
// CHECK: store i32 9, i32* @_ZN5test51U2k0E
// CHECK: store i32 {{.*}}, i32* @_ZN5test51U2k1E
// CHECK-NOT: store {{.*}} i32* @_ZN5test51U2k2E
}
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