111 lines · cpp
1// RUN: %clang_cc1 -triple x86_64-pc-linux -emit-llvm -o - %s | FileCheck %s2// RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -o - %s | \3// RUN: FileCheck --check-prefix=MACHO %s4 5// CHECK: @_ZN5test11A1aE ={{.*}} constant i32 10, align 46// CHECK: @_ZN5test212_GLOBAL__N_11AIiE1xE = internal global i32 0, align 47// CHECK: @_ZN5test31AIiE1xE = weak_odr global i32 0, comdat, align 48// CHECK: @_ZGVN5test31AIiE1xE = weak_odr global i64 0, comdat($_ZN5test31AIiE1xE)9// MACHO: @_ZGVN5test31AIiE1xE = weak_odr global i64 010// MACHO-NOT: comdat11 12// CHECK: _ZN5test51U2k0E ={{.*}} global i32 013// CHECK: _ZN5test51U2k1E ={{.*}} global i32 014// CHECK: _ZN5test51U2k2E ={{.*}} constant i32 7615// CHECK-NOT: test51U2k3E16// CHECK-NOT: test51U2k4E17 18// PR5564.19namespace test1 {20 struct A {21 static const int a = 10;22 };23 24 const int A::a;25 26 struct S { 27 static int i;28 };29 30 void f() { 31 int a = S::i;32 }33}34 35// Test that we don't use guards for initializing template static data36// members with internal linkage.37namespace test2 {38 int foo();39 40 namespace {41 template <class T> struct A {42 static int x;43 };44 45 template <class T> int A<T>::x = foo();46 template struct A<int>;47 }48 49 // CHECK-LABEL: define internal void @__cxx_global_var_init()50 // CHECK: [[TMP:%.*]] = call noundef i32 @_ZN5test23fooEv()51 // CHECK-NEXT: store i32 [[TMP]], ptr @_ZN5test212_GLOBAL__N_11AIiE1xE, align 452 // CHECK-NEXT: ret void53}54 55// Test that we don't use threadsafe statics when initializing56// template static data members.57namespace test3 {58 int foo();59 60 template <class T> struct A {61 static int x;62 };63 64 template <class T> int A<T>::x = foo();65 template struct A<int>;66 67 // CHECK-LABEL: define internal void @__cxx_global_var_init.1() {{.*}} comdat($_ZN5test31AIiE1xE)68 // MACHO-LABEL: define internal void @__cxx_global_var_init.1()69 // MACHO-NOT: comdat70 // CHECK: [[GUARDBYTE:%.*]] = load i8, ptr @_ZGVN5test31AIiE1xE71 // CHECK-NEXT: [[UNINITIALIZED:%.*]] = icmp eq i8 [[GUARDBYTE]], 072 // CHECK-NEXT: br i1 [[UNINITIALIZED]]73 // CHECK: store i8 1, ptr @_ZGVN5test31AIiE1xE74 // CHECK-NEXT: [[TMP:%.*]] = call noundef i32 @_ZN5test33fooEv()75 // CHECK-NEXT: store i32 [[TMP]], ptr @_ZN5test31AIiE1xE, align 476 // CHECK-NEXT: br label77 // CHECK: ret void78}79 80// Test that we can fold member lookup expressions which resolve to static data81// members.82namespace test4 {83 struct A {84 static const int n = 76;85 };86 87 int f(A *a) {88 // CHECK-LABEL: define{{.*}} i32 @_ZN5test41fEPNS_1AE89 // CHECK: ret i32 7690 return a->n;91 }92}93 94// Test that static data members in unions behave properly.95namespace test5 {96 union U {97 static int k0;98 static const int k1;99 static const int k2 = 76;100 static const int k3;101 static const int k4 = 81;102 };103 int U::k0;104 const int U::k1 = (k0 = 9, 42);105 const int U::k2;106 107 // CHECK: store i32 9, ptr @_ZN5test51U2k0E108 // CHECK: store i32 {{.*}}, ptr @_ZN5test51U2k1E109 // CHECK-NOT: store {{.*}} ptr @_ZN5test51U2k2E110}111