clang/test/CodeGenCXX/ms-thread_local.cpp

   1 // RUN: %clang_cc1 %s -std=c++1y -triple=i686-pc-win32 -fms-compatibility-version=19.25 -emit-llvm -o - | FileCheck %s
   2 // RUN: %clang_cc1 %s -std=c++1y -triple=i686-pc-win32 -fms-compatibility-version=19.20 -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-LEGACY
   3 // RUN: %clang_cc1 %s -std=c++1y -triple=i686-pc-win32 -fms-compatibility-version=19.25 -ftls-model=local-dynamic -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-LD
   4
   5 struct A {
   6   A();
   7   ~A();
   8 };
   9
  10 // CHECK-DAG: $"??$a@X@@3UA@@A" = comdat any
  11 // CHECK-DAG: @"??$a@X@@3UA@@A" = linkonce_odr dso_local thread_local global %struct.A zeroinitializer, comdat, align 1
  12 // CHECK-DAG: @"??__E?$a@X@@YAXXZ$initializer$" = internal constant ptr @"??__E?$a@X@@YAXXZ", section ".CRT$XDU", comdat($"??$a@X@@3UA@@A")
  13 // CHECK-LD-DAG: $"??$a@X@@3UA@@A" = comdat any
  14 // CHECK-LD-DAG: @"??$a@X@@3UA@@A" = linkonce_odr dso_local thread_local(localdynamic) global %struct.A zeroinitializer, comdat, align 1
  15 // CHECK-LD-DAG: @"??__E?$a@X@@YAXXZ$initializer$" = internal constant ptr @"??__E?$a@X@@YAXXZ", section ".CRT$XDU", comdat($"??$a@X@@3UA@@A")
  16 template <typename T>
  17 thread_local A a = A();
  18
  19 // CHECK-DAG: @"?b@@3UA@@A" = dso_local thread_local global %struct.A zeroinitializer, align 1
  20 // CHECK-DAG: @"__tls_init$initializer$" = internal constant ptr @__tls_init, section ".CRT$XDU"
  21 // CHECK-DAG: @__tls_guard = external dso_local thread_local global i8
  22 // CHECK-LD-DAG: @"?b@@3UA@@A" = dso_local thread_local(localdynamic) global %struct.A zeroinitializer, align 1
  23 // CHECK-LD-DAG: @"__tls_init$initializer$" = internal constant ptr @__tls_init, section ".CRT$XDU"
  24 // CHECK-LD-DAG: @__tls_guard = external dso_local thread_local global i8
  25 // CHECK-LEGACY-NOT: @__tls_guard = external dso_local thread_local global i8
  26 thread_local A b;
  27
  28 // CHECK-LABEL: declare dso_local void @__dyn_tls_on_demand_init()
  29 // CHECK-LD-LABEL: declare dso_local void @__dyn_tls_on_demand_init()
  30 // CHECK-LEGACY-NOT: declare dso_local void @__dyn_tls_on_demand_init()
  31
  32 // CHECK-LABEL: define dso_local void @"?f@@YA?AUA@@XZ"(ptr noalias sret(%struct.A) align 1 %agg.result)
  33 // CHECK: call void @__dyn_tls_on_demand_init()
  34 // CHECK-LD-LABEL: define dso_local void @"?f@@YA?AUA@@XZ"(ptr noalias sret(%struct.A) align 1 %agg.result)
  35 // CHECK-LD: call void @__dyn_tls_on_demand_init()
  36 // CHECK-LEGACY-NOT: call void @__dyn_tls_on_demand_init()
  37
  38 thread_local A &c = b;
  39 thread_local A &d = c;
  40
  41 A f() {
  42   (void)a<void>;
  43   (void)b;
  44   return c;
  45 }
  46
  47 // CHECK-LABEL: define dso_local noundef i32 @"?g@@YAHXZ"()
  48 // CHECK-NOT: call void @__dyn_tls_on_demand_init()
  49 // CHECK-LD-LABEL: define dso_local noundef i32 @"?g@@YAHXZ"()
  50 // CHECK-LD-NOT: call void @__dyn_tls_on_demand_init()
  51
  52 thread_local int e = 2;
  53
  54 int g() {
  55   return e;
  56 }
  57
  58 // CHECK-LABEL: define internal void @__tls_init()
  59 // CHECK: call void @"??__Eb@@YAXXZ"
  60 // CHECK-LD-LABEL: define internal void @__tls_init()
  61 // CHECK-LD: call void @"??__Eb@@YAXXZ"
  62
  63 // CHECK: !llvm.linker.options = !{![[dyn_tls_init:[0-9]+]]}
  64 // CHECK: ![[dyn_tls_init]] = !{!"/include:___dyn_tls_init@12"}
  65 // CHECK-LD: !llvm.linker.options = !{![[dyn_tls_init:[0-9]+]]}
  66 // CHECK-LD: ![[dyn_tls_init]] = !{!"/include:___dyn_tls_init@12"}