clang/test/CodeGen/tls-model.cpp

   1 // RUN: %clang_cc1 %s -triple x86_64-pc-linux-gnu -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-GD
   2 // RUN: %clang_cc1 %s -triple x86_64-pc-linux-gnu -ftls-model=global-dynamic -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-GD
   3 // RUN: %clang_cc1 %s -triple x86_64-pc-linux-gnu -ftls-model=local-dynamic -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-LD
   4 // RUN: %clang_cc1 %s -triple x86_64-pc-linux-gnu -ftls-model=initial-exec -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-IE
   5 // RUN: %clang_cc1 %s -triple x86_64-pc-linux-gnu -ftls-model=local-exec -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-LE
   6 //
   7 // RUN: %clang_cc1 %s -triple x86_64-pc-linux-gnu -femulated-tls -emit-llvm -o - 2>&1 | \
   8 // RUN:     FileCheck %s -check-prefix=CHECK-GD
   9
  10 int z1 = 0;
  11 int z2;
  12 int __thread x;
  13 int f() {
  14   static int __thread y;
  15   return y++;
  16 }
  17 int __thread __attribute__((tls_model("initial-exec"))) z;
  18
  19 struct S {
  20   S();
  21   ~S();
  22 };
  23 struct T {
  24   ~T();
  25 };
  26
  27 struct S thread_local s1;
  28 struct T thread_local t1;
  29
  30 // Note that unlike normal C uninitialized global variables,
  31 // uninitialized TLS variables do NOT have COMMON linkage.
  32
  33 // CHECK-GD: @z1 ={{.*}} global i32 0
  34 // CHECK-GD: @z2 ={{.*}} global i32 0
  35 // CHECK-GD: @x ={{.*}} thread_local global i32 0
  36 // CHECK-GD: @_ZZ1fvE1y = internal thread_local global i32 0
  37 // CHECK-GD: @z ={{.*}} thread_local(initialexec) global i32 0
  38 // CHECK-GD: @s1 ={{.*}} thread_local global %struct.S zeroinitializer
  39 // CHECK-GD: @t1 ={{.*}} thread_local global %struct.T zeroinitializer
  40 // CHECK-GD: @__tls_guard = internal thread_local global i8 0
  41
  42 // CHECK-LD: @z1 ={{.*}} global i32 0
  43 // CHECK-LD: @z2 ={{.*}} global i32 0
  44 // CHECK-LD: @x ={{.*}} thread_local(localdynamic) global i32 0
  45 // CHECK-LD: @_ZZ1fvE1y = internal thread_local(localdynamic) global i32 0
  46 // CHECK-LD: @z ={{.*}} thread_local(initialexec) global i32 0
  47 // CHECK-LD: @s1 ={{.*}} thread_local(localdynamic) global %struct.S zeroinitializer
  48 // CHECK-LD: @t1 ={{.*}} thread_local(localdynamic) global %struct.T zeroinitializer
  49 // CHECK-LD: @__tls_guard = internal thread_local(localdynamic) global i8 0
  50
  51 // CHECK-IE: @z1 ={{.*}} global i32 0
  52 // CHECK-IE: @z2 ={{.*}} global i32 0
  53 // CHECK-IE: @x ={{.*}} thread_local(initialexec) global i32 0
  54 // CHECK-IE: @_ZZ1fvE1y = internal thread_local(initialexec) global i32 0
  55 // CHECK-IE: @z ={{.*}} thread_local(initialexec) global i32 0
  56 // CHECK-IE: @s1 ={{.*}} thread_local(initialexec) global %struct.S zeroinitializer
  57 // CHECK-IE: @t1 ={{.*}} thread_local(initialexec) global %struct.T zeroinitializer
  58 // CHECK-IE: @__tls_guard = internal thread_local(initialexec) global i8 0
  59
  60 // CHECK-LE: @z1 ={{.*}} global i32 0
  61 // CHECK-LE: @z2 ={{.*}} global i32 0
  62 // CHECK-LE: @x ={{.*}} thread_local(localexec) global i32 0
  63 // CHECK-LE: @_ZZ1fvE1y = internal thread_local(localexec) global i32 0
  64 // CHECK-LE: @z ={{.*}} thread_local(initialexec) global i32 0
  65 // CHECK-LE: @s1 ={{.*}} thread_local(localexec) global %struct.S zeroinitializer
  66 // CHECK-LE: @t1 ={{.*}} thread_local(localexec) global %struct.T zeroinitializer
  67 // CHECK-LE: @__tls_guard = internal thread_local(localexec) global i8 0