clang/test/CodeGenCXX/visibility-dllstorageclass.cpp

   1 // REQUIRES: x86-registered-target
   2
   3 // Test that -fvisibility-from-dllstorageclass maps DLL storage class to visibility
   4 // and that it overrides the effect of visibility options and annotations.
   5
   6 // RUN: %clang_cc1 -triple x86_64-unknown-windows-itanium -fdeclspec \
   7 // RUN:     -fvisibility=hidden \
   8 // RUN:     -fapply-global-visibility-to-externs \
   9 // RUN:     -fvisibility-from-dllstorageclass \
  10 // RUN:     -x c++ %s -S -emit-llvm -o - | \
  11 // RUN:   FileCheck %s --check-prefixes=DEFAULTS
  12
  13 // RUN: %clang_cc1 -triple x86_64-unknown-windows-itanium -fdeclspec \
  14 // RUN:     -fvisibility=hidden \
  15 // RUN:     -fapply-global-visibility-to-externs \
  16 // RUN:     -fvisibility-from-dllstorageclass \
  17 // RUN:     -fvisibility-dllexport=hidden \
  18 // RUN:     -fvisibility-nodllstorageclass=protected \
  19 // RUN:     -fvisibility-externs-dllimport=hidden \
  20 // RUN:     -fvisibility-externs-nodllstorageclass=protected \
  21 // RUN:     -x c++  %s -S -emit-llvm -o - | \
  22 // RUN:   FileCheck %s --check-prefixes=EXPLICIT
  23
  24 // RUN: %clang_cc1 -triple x86_64-unknown-windows-itanium -fdeclspec \
  25 // RUN:     -fvisibility=hidden \
  26 // RUN:     -fapply-global-visibility-to-externs \
  27 // RUN:     -fvisibility-from-dllstorageclass \
  28 // RUN:     -fvisibility-dllexport=default \
  29 // RUN:     -fvisibility-nodllstorageclass=default \
  30 // RUN:     -fvisibility-externs-dllimport=default \
  31 // RUN:     -fvisibility-externs-nodllstorageclass=default \
  32 // RUN:     -x c++  %s -S -emit-llvm -o - | \
  33 // RUN:   FileCheck %s --check-prefixes=ALL_DEFAULT
  34
  35 // Local
  36 static void l() {}
  37 void use_locals(){l();}
  38 // DEFAULTS-DAG: define internal void @_ZL1lv()
  39 // EXPLICIT-DAG: define internal void @_ZL1lv()
  40 // ALL_DEFAULT-DAG: define internal void @_ZL1lv()
  41
  42 // Function
  43 void f() {}
  44 void __declspec(dllexport) exported_f() {}
  45 // DEFAULTS-DAG: define hidden void @_Z1fv()
  46 // DEFAULTS-DAG: define void @_Z10exported_fv()
  47 // EXPLICIT-DAG: define protected void @_Z1fv()
  48 // EXPLICIT-DAG: define hidden void @_Z10exported_fv()
  49 // ALL_DEFAULT-DAG: define void @_Z1fv()
  50 // ALL_DEFAULT-DAG: define void @_Z10exported_fv()
  51
  52 // Variable
  53 int d = 123;
  54 __declspec(dllexport) int exported_d = 123;
  55 // DEFAULTS-DAG: @d = hidden global
  56 // DEFAULTS-DAG: @exported_d = global
  57 // EXPLICIT-DAG: @d = protected global
  58 // EXPLICIT-DAG: @exported_d = hidden global
  59 // ALL_DEFAULT-DAG: @d = global
  60 // ALL_DEFAULT-DAG: @exported_d = global
  61
  62 // Alias
  63 extern "C" void aliased() {}
  64 void a() __attribute__((alias("aliased")));
  65 void __declspec(dllexport) a_exported() __attribute__((alias("aliased")));
  66 // DEFAULTS-DAG: @_Z1av = hidden alias
  67 // DEFAULTS-DAG: @_Z10a_exportedv = alias
  68 // EXPLICIT-DAG: @_Z1av = protected alias
  69 // EXPLICIT-DAG: @_Z10a_exportedv = hidden alias
  70 // ALL_DEFAULT-DAG: @_Z1av = alias
  71 // ALL_DEFAULT-DAG: @_Z10a_exportedv = alias
  72
  73 // Declaration
  74 extern void e();
  75 extern void __declspec(dllimport) imported_e();
  76 // DEFAULTS-DAG: declare hidden void @_Z1ev()
  77 // DEFAULTS-DAG: declare void @_Z10imported_ev()
  78 // EXPLICIT-DAG: declare protected void @_Z1ev()
  79 // EXPLICIT-DAG: declare hidden void @_Z10imported_ev()
  80 // ALL_DEFAULT-DAG: declare void @_Z1ev()
  81 // ALL_DEFAULT-DAG: declare void @_Z10imported_ev()
  82
  83 // Weak Declaration
  84 __attribute__((weak))
  85 extern void w();
  86 __attribute__((weak))
  87 extern void __declspec(dllimport) imported_w();
  88 // DEFAULTS-DAG: declare extern_weak hidden void @_Z1wv()
  89 // DEFAULTS-DAG: declare extern_weak void @_Z10imported_wv()
  90 // EXPLICIT-DAG: declare extern_weak protected void @_Z1wv()
  91 // EXPLICIT-DAG: declare extern_weak hidden void @_Z10imported_wv()
  92 // ALL_DEFAULT-DAG: declare extern_weak void @_Z1wv()
  93 // ALL_DEFAULT-DAG: declare extern_weak void @_Z10imported_wv()
  94
  95 void use_declarations(){e(); imported_e(); w(); imported_w();}
  96
  97 // Show that -fvisibility-from-dllstorageclass overrides the effect of visibility annotations.
  98
  99 struct __attribute__((type_visibility("protected"))) t {
 100   virtual void foo();
 101 };
 102 void t::foo() {}
 103 // DEFAULTS-DAG: @_ZTV1t = hidden unnamed_addr constant
 104
 105 int v __attribute__ ((__visibility__ ("protected"))) = 123;
 106 // DEFAULTS-DAG: @v = hidden global
 107
 108 #pragma GCC visibility push(protected)
 109 int p = 345;
 110 #pragma GCC visibility pop
 111 // DEFAULTS-DAG: @p = hidden global