111 lines
3.0 KiB
C++
111 lines
3.0 KiB
C++
// RUN: %clang_cc1 -triple x86_64-pc-linux -emit-llvm -o - %s | FileCheck %s
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// RUN: %clang_cc1 -triple x86_64-apple-darwin -emit-llvm -o - %s | \
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// RUN: FileCheck --check-prefix=MACHO %s
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// CHECK: @_ZN5test11A1aE = constant i32 10, align 4
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// CHECK: @_ZN5test212_GLOBAL__N_11AIiE1xE = internal global i32 0, align 4
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// CHECK: @_ZN5test31AIiE1xE = weak_odr global i32 0, comdat, align 4
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// CHECK: @_ZGVN5test31AIiE1xE = weak_odr global i64 0, comdat($_ZN5test31AIiE1xE)
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// MACHO: @_ZGVN5test31AIiE1xE = weak_odr global i64 0
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// MACHO-NOT: comdat
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// CHECK: _ZN5test51U2k0E = global i32 0
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// CHECK: _ZN5test51U2k1E = global i32 0
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// CHECK: _ZN5test51U2k2E = constant i32 76
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// CHECK-NOT: test51U2k3E
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// CHECK-NOT: test51U2k4E
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// PR5564.
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namespace test1 {
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struct A {
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static const int a = 10;
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};
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const int A::a;
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struct S {
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static int i;
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};
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void f() {
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int a = S::i;
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}
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}
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// Test that we don't use guards for initializing template static data
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// members with internal linkage.
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namespace test2 {
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int foo();
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namespace {
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template <class T> struct A {
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static int x;
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};
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template <class T> int A<T>::x = foo();
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template struct A<int>;
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}
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// CHECK-LABEL: define internal void @__cxx_global_var_init()
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// CHECK: [[TMP:%.*]] = call i32 @_ZN5test23fooEv()
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// CHECK-NEXT: store i32 [[TMP]], i32* @_ZN5test212_GLOBAL__N_11AIiE1xE, align 4
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// CHECK-NEXT: ret void
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}
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// Test that we don't use threadsafe statics when initializing
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// template static data members.
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namespace test3 {
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int foo();
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template <class T> struct A {
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static int x;
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};
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template <class T> int A<T>::x = foo();
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template struct A<int>;
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// CHECK-LABEL: define internal void @__cxx_global_var_init.1() {{.*}} comdat($_ZN5test31AIiE1xE)
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// MACHO-LABEL: define internal void @__cxx_global_var_init.1()
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// MACHO-NOT: comdat
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// CHECK: [[GUARDBYTE:%.*]] = load i8, i8* bitcast (i64* @_ZGVN5test31AIiE1xE to i8*)
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// CHECK-NEXT: [[UNINITIALIZED:%.*]] = icmp eq i8 [[GUARDBYTE]], 0
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// CHECK-NEXT: br i1 [[UNINITIALIZED]]
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// CHECK: [[TMP:%.*]] = call i32 @_ZN5test33fooEv()
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// CHECK-NEXT: store i32 [[TMP]], i32* @_ZN5test31AIiE1xE, align 4
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// CHECK-NEXT: store i64 1, i64* @_ZGVN5test31AIiE1xE
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// CHECK-NEXT: br label
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// CHECK: ret void
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}
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// Test that we can fold member lookup expressions which resolve to static data
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// members.
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namespace test4 {
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struct A {
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static const int n = 76;
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};
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int f(A *a) {
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// CHECK-LABEL: define i32 @_ZN5test41fEPNS_1AE
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// CHECK: ret i32 76
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return a->n;
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}
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}
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// Test that static data members in unions behave properly.
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namespace test5 {
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union U {
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static int k0;
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static const int k1;
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static const int k2 = 76;
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static const int k3;
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static const int k4 = 81;
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};
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int U::k0;
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const int U::k1 = (k0 = 9, 42);
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const int U::k2;
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// CHECK: store i32 9, i32* @_ZN5test51U2k0E
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// CHECK: store i32 {{.*}}, i32* @_ZN5test51U2k1E
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// CHECK-NOT: store {{.*}} i32* @_ZN5test51U2k2E
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}
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