| 1 | // RUN: %clang_cc1 -triple x86_64-pc-linux -emit-llvm -o - %s | FileCheck %s |
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| 2 | // RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -o - %s | \ |
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| 3 | // RUN: FileCheck --check-prefix=MACHO %s |
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| 4 | |
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| 5 | // CHECK: @_ZN5test11A1aE = constant i32 10, align 4 |
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| 6 | // CHECK: @_ZN5test212_GLOBAL__N_11AIiE1xE = internal global i32 0, align 4 |
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| 7 | // CHECK: @_ZN5test31AIiE1xE = weak_odr global i32 0, comdat, align 4 |
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| 8 | // CHECK: @_ZGVN5test31AIiE1xE = weak_odr global i64 0, comdat($_ZN5test31AIiE1xE) |
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| 9 | // MACHO: @_ZGVN5test31AIiE1xE = weak_odr global i64 0 |
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| 10 | // MACHO-NOT: comdat |
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| 11 | |
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| 12 | // CHECK: _ZN5test51U2k0E = global i32 0 |
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| 13 | // CHECK: _ZN5test51U2k1E = global i32 0 |
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| 14 | // CHECK: _ZN5test51U2k2E = constant i32 76 |
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| 15 | // CHECK-NOT: test51U2k3E |
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| 16 | // CHECK-NOT: test51U2k4E |
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| 17 | |
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| 18 | // PR5564. |
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| 19 | namespace test1 { |
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| 20 | struct A { |
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| 21 | static const int a = 10; |
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| 22 | }; |
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| 23 | |
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| 24 | const int A::a; |
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| 25 | |
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| 26 | struct S { |
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| 27 | static int i; |
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| 28 | }; |
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| 29 | |
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| 30 | void f() { |
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| 31 | int a = S::i; |
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| 32 | } |
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| 33 | } |
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| 34 | |
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| 35 | // Test that we don't use guards for initializing template static data |
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| 36 | // members with internal linkage. |
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| 37 | namespace test2 { |
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| 38 | int foo(); |
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| 39 | |
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| 40 | namespace { |
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| 41 | template <class T> struct A { |
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| 42 | static int x; |
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| 43 | }; |
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| 44 | |
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| 45 | template <class T> int A<T>::x = foo(); |
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| 46 | template struct A<int>; |
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| 47 | } |
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| 48 | |
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| 49 | // CHECK-LABEL: define internal void @__cxx_global_var_init() |
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| 50 | // CHECK: [[TMP:%.*]] = call i32 @_ZN5test23fooEv() |
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| 51 | // CHECK-NEXT: store i32 [[TMP]], i32* @_ZN5test212_GLOBAL__N_11AIiE1xE, align 4 |
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| 52 | // CHECK-NEXT: ret void |
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| 53 | } |
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| 54 | |
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| 55 | // Test that we don't use threadsafe statics when initializing |
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| 56 | // template static data members. |
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| 57 | namespace test3 { |
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| 58 | int foo(); |
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| 59 | |
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| 60 | template <class T> struct A { |
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| 61 | static int x; |
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| 62 | }; |
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| 63 | |
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| 64 | template <class T> int A<T>::x = foo(); |
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| 65 | template struct A<int>; |
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| 66 | |
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| 67 | // CHECK-LABEL: define internal void @__cxx_global_var_init.1() {{.*}} comdat($_ZN5test31AIiE1xE) |
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| 68 | // MACHO-LABEL: define internal void @__cxx_global_var_init.1() |
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| 69 | // MACHO-NOT: comdat |
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| 70 | // CHECK: [[GUARDBYTE:%.*]] = load i8, i8* bitcast (i64* @_ZGVN5test31AIiE1xE to i8*) |
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| 71 | // CHECK-NEXT: [[UNINITIALIZED:%.*]] = icmp eq i8 [[GUARDBYTE]], 0 |
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| 72 | // CHECK-NEXT: br i1 [[UNINITIALIZED]] |
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| 73 | // CHECK: [[TMP:%.*]] = call i32 @_ZN5test33fooEv() |
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| 74 | // CHECK-NEXT: store i32 [[TMP]], i32* @_ZN5test31AIiE1xE, align 4 |
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| 75 | // CHECK-NEXT: store i64 1, i64* @_ZGVN5test31AIiE1xE |
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| 76 | // CHECK-NEXT: br label |
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| 77 | // CHECK: ret void |
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| 78 | } |
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| 79 | |
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| 80 | // Test that we can fold member lookup expressions which resolve to static data |
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| 81 | // members. |
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| 82 | namespace test4 { |
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| 83 | struct A { |
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| 84 | static const int n = 76; |
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| 85 | }; |
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| 86 | |
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| 87 | int f(A *a) { |
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| 88 | // CHECK-LABEL: define i32 @_ZN5test41fEPNS_1AE |
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| 89 | // CHECK: ret i32 76 |
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| 90 | return a->n; |
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| 91 | } |
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| 92 | } |
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| 93 | |
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| 94 | // Test that static data members in unions behave properly. |
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| 95 | namespace test5 { |
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| 96 | union U { |
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| 97 | static int k0; |
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| 98 | static const int k1; |
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| 99 | static const int k2 = 76; |
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| 100 | static const int k3; |
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| 101 | static const int k4 = 81; |
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| 102 | }; |
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| 103 | int U::k0; |
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| 104 | const int U::k1 = (k0 = 9, 42); |
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| 105 | const int U::k2; |
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| 106 | |
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| 107 | // CHECK: store i32 9, i32* @_ZN5test51U2k0E |
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| 108 | // CHECK: store i32 {{.*}}, i32* @_ZN5test51U2k1E |
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| 109 | // CHECK-NOT: store {{.*}} i32* @_ZN5test51U2k2E |
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| 110 | } |
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| 111 | |
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