cdf7ef5437
data members by delaying the emission of the initializer until after linkage and visibility have been set on the global. Also, don't emit a guard unless the variable actually ends up with vague linkage, and don't use thread-safe statics in any case. llvm-svn: 118336
67 lines
1.7 KiB
C++
67 lines
1.7 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -o - %s | FileCheck %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 global i32 0, align 4
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// CHECK: @_ZGVN5test31AIiE1xE = weak global i64 0
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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: 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: define internal void @__cxx_global_var_init1()
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// CHECK: [[GUARDBYTE:%.*]] = load 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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