181 lines
5.4 KiB
C++
181 lines
5.4 KiB
C++
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// RUN: %clang_cc1 -std=c++11 -emit-llvm %s -o - -triple x86_64-linux-gnu | FileCheck %s
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int f();
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int g();
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// CHECK: @a = thread_local global i32 0
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thread_local int a = f();
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extern thread_local int b;
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// CHECK: @c = global i32 0
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int c = b;
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// CHECK: @_ZL1d = internal thread_local global i32 0
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static thread_local int d = g();
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struct U { static thread_local int m; };
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// CHECK: @_ZN1U1mE = thread_local global i32 0
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thread_local int U::m = f();
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template<typename T> struct V { static thread_local int m; };
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template<typename T> thread_local int V<T>::m = g();
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// CHECK: @e = global i32 0
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int e = V<int>::m;
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// CHECK: @_ZN1VIiE1mE = weak_odr thread_local global i32 0
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// CHECK: @_ZZ1fvE1n = internal thread_local global i32 0
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// CHECK: @_ZGVZ1fvE1n = internal thread_local global i8 0
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// CHECK: @_ZZ8tls_dtorvE1s = internal thread_local global
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// CHECK: @_ZGVZ8tls_dtorvE1s = internal thread_local global i8 0
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// CHECK: @_ZZ8tls_dtorvE1t = internal thread_local global
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// CHECK: @_ZGVZ8tls_dtorvE1t = internal thread_local global i8 0
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// CHECK: @_ZZ8tls_dtorvE1u = internal thread_local global
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// CHECK: @_ZGVZ8tls_dtorvE1u = internal thread_local global i8 0
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// CHECK: @_ZGRZ8tls_dtorvE1u = private thread_local global
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// CHECK: @_ZGVN1VIiE1mE = weak_odr thread_local global i64 0
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// CHECK: @__tls_guard = internal thread_local global i8 0
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// CHECK: @llvm.global_ctors = appending global {{.*}} @[[GLOBAL_INIT:[^ ]*]]
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// CHECK: @_ZTH1a = alias void ()* @__tls_init
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// CHECK: @_ZTHL1d = alias internal void ()* @__tls_init
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// CHECK: @_ZTHN1U1mE = alias void ()* @__tls_init
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// CHECK: @_ZTHN1VIiE1mE = alias weak_odr void ()* @__tls_init
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// Individual variable initialization functions:
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// CHECK: define {{.*}} @[[A_INIT:.*]]()
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// CHECK: call i32 @_Z1fv()
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// CHECK-NEXT: store i32 {{.*}}, i32* @a, align 4
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// CHECK-LABEL: define i32 @_Z1fv()
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int f() {
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// CHECK: %[[GUARD:.*]] = load i8* @_ZGVZ1fvE1n, align 1
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// CHECK: %[[NEED_INIT:.*]] = icmp eq i8 %[[GUARD]], 0
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// CHECK: br i1 %[[NEED_INIT]]
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// CHECK: %[[CALL:.*]] = call i32 @_Z1gv()
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// CHECK: store i32 %[[CALL]], i32* @_ZZ1fvE1n, align 4
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// CHECK: store i8 1, i8* @_ZGVZ1fvE1n
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// CHECK: br label
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static thread_local int n = g();
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// CHECK: load i32* @_ZZ1fvE1n, align 4
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return n;
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}
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// CHECK: define {{.*}} @[[C_INIT:.*]]()
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// CHECK: call i32* @_ZTW1b()
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// CHECK-NEXT: load i32* %{{.*}}, align 4
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// CHECK-NEXT: store i32 %{{.*}}, i32* @c, align 4
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// CHECK-LABEL: define weak_odr hidden i32* @_ZTW1b()
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// CHECK: br i1 icmp ne (void ()* @_ZTH1b, void ()* null),
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// not null:
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// CHECK: call void @_ZTH1b()
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// CHECK: br label
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// finally:
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// CHECK: ret i32* @b
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// CHECK: define {{.*}} @[[D_INIT:.*]]()
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// CHECK: call i32 @_Z1gv()
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// CHECK-NEXT: store i32 %{{.*}}, i32* @_ZL1d, align 4
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// CHECK: define {{.*}} @[[U_M_INIT:.*]]()
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// CHECK: call i32 @_Z1fv()
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// CHECK-NEXT: store i32 %{{.*}}, i32* @_ZN1U1mE, align 4
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// CHECK: define {{.*}} @[[E_INIT:.*]]()
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// CHECK: call i32* @_ZTWN1VIiE1mE()
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// CHECK-NEXT: load i32* %{{.*}}, align 4
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// CHECK-NEXT: store i32 %{{.*}}, i32* @e, align 4
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// CHECK-LABEL: define weak_odr hidden i32* @_ZTWN1VIiE1mE()
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// CHECK: call void @_ZTHN1VIiE1mE()
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// CHECK: ret i32* @_ZN1VIiE1mE
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struct S { S(); ~S(); };
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struct T { ~T(); };
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// CHECK-LABEL: define void @_Z8tls_dtorv()
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void tls_dtor() {
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// CHECK: load i8* @_ZGVZ8tls_dtorvE1s
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// CHECK: call void @_ZN1SC1Ev(%struct.S* @_ZZ8tls_dtorvE1s)
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// CHECK: call i32 @__cxa_thread_atexit({{.*}}@_ZN1SD1Ev {{.*}} @_ZZ8tls_dtorvE1s{{.*}} @__dso_handle
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// CHECK: store i8 1, i8* @_ZGVZ8tls_dtorvE1s
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static thread_local S s;
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// CHECK: load i8* @_ZGVZ8tls_dtorvE1t
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// CHECK-NOT: _ZN1T
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// CHECK: call i32 @__cxa_thread_atexit({{.*}}@_ZN1TD1Ev {{.*}}@_ZZ8tls_dtorvE1t{{.*}} @__dso_handle
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// CHECK: store i8 1, i8* @_ZGVZ8tls_dtorvE1t
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static thread_local T t;
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// CHECK: load i8* @_ZGVZ8tls_dtorvE1u
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// CHECK: call void @_ZN1SC1Ev(%struct.S* @_ZGRZ8tls_dtorvE1u)
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// CHECK: call i32 @__cxa_thread_atexit({{.*}}@_ZN1SD1Ev {{.*}} @_ZGRZ8tls_dtorvE1u{{.*}} @__dso_handle
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// CHECK: store i8 1, i8* @_ZGVZ8tls_dtorvE1u
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static thread_local const S &u = S();
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}
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// CHECK: declare i32 @__cxa_thread_atexit(void (i8*)*, i8*, i8*)
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// CHECK: define {{.*}} @_Z7PR15991v(
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int PR15991() {
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thread_local int n;
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auto l = [] { return n; };
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return l();
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}
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// CHECK: define {{.*}} @[[V_M_INIT:.*]]()
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// CHECK: load i8* bitcast (i64* @_ZGVN1VIiE1mE to i8*)
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// CHECK: %[[V_M_INITIALIZED:.*]] = icmp eq i8 %{{.*}}, 0
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// CHECK: br i1 %[[V_M_INITIALIZED]],
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// need init:
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// CHECK: call i32 @_Z1gv()
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// CHECK: store i32 %{{.*}}, i32* @_ZN1VIiE1mE, align 4
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// CHECK: store i64 1, i64* @_ZGVN1VIiE1mE
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// CHECK: br label
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// CHECK: define {{.*}}@[[GLOBAL_INIT:.*]]()
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// CHECK: call void @[[C_INIT]]()
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// CHECK: call void @[[E_INIT]]()
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// CHECK: define {{.*}}@__tls_init()
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// CHECK: load i8* @__tls_guard
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// CHECK: %[[NEED_TLS_INIT:.*]] = icmp eq i8 %{{.*}}, 0
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// CHECK: store i8 1, i8* @__tls_guard
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// CHECK: br i1 %[[NEED_TLS_INIT]],
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// init:
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// CHECK: call void @[[A_INIT]]()
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// CHECK: call void @[[D_INIT]]()
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// CHECK: call void @[[U_M_INIT]]()
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// CHECK: call void @[[V_M_INIT]]()
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// CHECK: define weak_odr hidden i32* @_ZTW1a() {
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// CHECK: call void @_ZTH1a()
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// CHECK: ret i32* @a
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// CHECK: }
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// CHECK: declare extern_weak void @_ZTH1b()
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// CHECK-LABEL: define internal hidden i32* @_ZTWL1d()
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// CHECK: call void @_ZTHL1d()
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// CHECK: ret i32* @_ZL1d
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// CHECK-LABEL: define weak_odr hidden i32* @_ZTWN1U1mE()
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// CHECK: call void @_ZTHN1U1mE()
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// CHECK: ret i32* @_ZN1U1mE
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