clang/test/CodeGen/dso-local-executable.c

   1 // RUN: %clang_cc1 -triple x86_64-pc-win32 -emit-llvm %s -o - | FileCheck --check-prefix=COFF %s
   2 // COFF:      @baz = dso_local global i32 42
   3 // COFF-NEXT: @import_var = external dllimport global i32
   4 // COFF-NEXT: @weak_bar = extern_weak global i32
   5 // COFF-NEXT: @bar = external dso_local global i32
   6 // COFF-NEXT: @local_thread_var = dso_local thread_local global i32 42
   7 // COFF-NEXT: @thread_var = external dso_local thread_local global i32
   8 // COFF-DAG: declare dso_local void @foo()
   9 // COFF-DAG: define dso_local ptr @zed()
  10 // COFF-DAG: declare dllimport void @import_func()
  11
  12 // RUN: %clang_cc1 -triple x86_64-w64-mingw32 -emit-llvm %s -o - | FileCheck --check-prefixes=MINGW,MINGW-NATIVE_TLS,MINGW-AUTO-IMPORT %s
  13 // RUN: %clang_cc1 -triple x86_64-w64-mingw32 -emit-llvm %s -o - -fno-auto-import | FileCheck --check-prefixes=MINGW,MINGW-NATIVE_TLS,MINGW-NO-AUTO-IMPORT %s
  14 // RUN: %clang_cc1 -triple x86_64-w64-mingw32 -emit-llvm %s -o - -femulated-tls | FileCheck --check-prefixes=MINGW,MINGW-EMUTLS,MINGW-AUTO-IMPORT %s
  15 // MINGW:      @baz = dso_local global i32 42
  16 // MINGW-NEXT: @import_var = external dllimport global i32
  17 // MINGW-NEXT: @weak_bar = extern_weak global i32
  18 // MINGW-AUTO-IMPORT-NEXT: @bar = external global i32
  19 // MINGW-NO-AUTO-IMPORT-NEXT: @bar = external dso_local global i32
  20 // MINGW-NEXT: @local_thread_var = dso_local thread_local global i32 42
  21 // MINGW-NATIVE_TLS-NEXT: @thread_var = external dso_local thread_local global i32
  22 // MINGW-EMUTLS-NEXT: @thread_var = external thread_local global i32
  23 // MINGW-DAG: declare dso_local void @foo()
  24 // MINGW-DAG: define dso_local ptr @zed()
  25 // MINGW-DAG: declare dllimport void @import_func()
  26
  27 /// Static relocation model defaults to -fdirect-access-external-data and sets
  28 /// dso_local on most global objects.
  29 // RUN: %clang_cc1 -triple x86_64 -emit-llvm -mrelocation-model static %s -o - | FileCheck --check-prefix=STATIC %s
  30 // RUN: %clang_cc1 -triple x86_64 -emit-llvm -mrelocation-model static -fdirect-access-external-data %s -o - | FileCheck --check-prefix=STATIC %s
  31 // STATIC:      @baz = dso_local global i32 42
  32 // STATIC-NEXT: @import_var = external dso_local global i32
  33 // STATIC-NEXT: @weak_bar = extern_weak dso_local global i32
  34 // STATIC-NEXT: @bar = external dso_local global i32
  35 // STATIC-NEXT: @local_thread_var = dso_local thread_local global i32 42
  36 // STATIC-NEXT: @thread_var = external thread_local global i32
  37 // STATIC-DAG: declare dso_local void @foo()
  38 // STATIC-DAG: define dso_local ptr @zed()
  39 // STATIC-DAG: declare dso_local void @import_func()
  40
  41 // STATIC-NOT: !"direct-access-external-data"
  42
  43 /// If -fno-direct-access-external-data is set, drop dso_local from global variable
  44 /// declarations.
  45 // RUN: %clang_cc1 -triple x86_64 -emit-llvm %s -mrelocation-model static -fno-direct-access-external-data -o - | FileCheck --check-prefix=STATIC-INDIRECT %s
  46 // STATIC-INDIRECT:      @baz = dso_local global i32 42
  47 // STATIC-INDIRECT-NEXT: @import_var = external global i32
  48 // STATIC-INDIRECT-NEXT: @weak_bar = extern_weak global i32
  49 // STATIC-INDIRECT-NEXT: @bar = external global i32
  50 // STATIC-INDIRECT-NEXT: @local_thread_var = dso_local thread_local global i32 42
  51 // STATIC-INDIRECT-NEXT: @thread_var = external thread_local global i32
  52 // STATIC-INDIRECT-DAG:  declare void @import_func()
  53 // STATIC-INDIRECT-DAG:  define dso_local ptr @zed()
  54 // STATIC-INDIRECT-DAG:  declare void @foo()
  55
  56 // STATIC-INDIRECT:      ![[#]] = !{i32 7, !"direct-access-external-data", i32 0}
  57
  58 // RUN: %clang_cc1 -triple x86_64 -emit-llvm -pic-level 1 -pic-is-pie %s -o - | FileCheck --check-prefix=PIE %s
  59 // PIE:      @baz = dso_local global i32 42
  60 // PIE-NEXT: @import_var = external global i32
  61 // PIE-NEXT: @weak_bar = extern_weak global i32
  62 // PIE-NEXT: @bar = external global i32
  63 // PIE-NEXT: @local_thread_var = dso_local thread_local global i32 42
  64 // PIE-NEXT: @thread_var = external thread_local global i32
  65 // PIE-DAG: declare void @foo()
  66 // PIE-DAG: define dso_local ptr @zed()
  67 // PIE-DAG: declare void @import_func()
  68
  69 // PIE-NOT:  !"direct-access-external-data"
  70
  71 // RUN: %clang_cc1 -triple x86_64 -emit-llvm -pic-level 1 -pic-is-pie -fdirect-access-external-data %s -o - | FileCheck --check-prefix=PIE-DIRECT %s
  72 // PIE-DIRECT:      @baz = dso_local global i32 42
  73 // PIE-DIRECT-NEXT: @import_var = external dso_local global i32
  74 // PIE-DIRECT-NEXT: @weak_bar = extern_weak global i32
  75 // PIE-DIRECT-NEXT: @bar = external dso_local global i32
  76 // PIE-DIRECT-NEXT: @local_thread_var = dso_local thread_local global i32 42
  77 // PIE-DIRECT-NEXT: @thread_var = external thread_local global i32
  78 // PIE-DIRECT-DAG: declare void @foo()
  79 // PIE-DIRECT-DAG: define dso_local ptr @zed()
  80 // PIE-DIRECT-DAG: declare void @import_func()
  81
  82 // PIE-DIRECT:      ![[#]] = !{i32 7, !"direct-access-external-data", i32 1}
  83
  84 // RUN: %clang_cc1 -triple x86_64 -emit-llvm -mrelocation-model static -fno-plt %s -o - | FileCheck --check-prefix=NOPLT %s
  85 // NOPLT:      @baz = dso_local global i32 42
  86 // NOPLT-NEXT: @import_var = external dso_local global i32
  87 // NOPLT-NEXT: @weak_bar = extern_weak dso_local global i32
  88 // NOPLT-NEXT: @bar = external dso_local global i32
  89 // NOPLT-NEXT: @local_thread_var = dso_local thread_local global i32 42
  90 // NOPLT-NEXT: @thread_var = external thread_local global i32
  91 // NOPLT-DAG: declare void @foo()
  92 // NOPLT-DAG: define dso_local ptr @zed()
  93 // NOPLT-DAG: declare void @import_func()
  94
  95 // RUN: %clang_cc1 -triple x86_64 -emit-llvm -fno-plt -pic-level 1 -pic-is-pie -fdirect-access-external-data %s -o - | FileCheck --check-prefix=PIE-DIRECT-NOPLT %s
  96 // PIE-DIRECT-NOPLT:      @baz = dso_local global i32 42
  97 // PIE-DIRECT-NOPLT-NEXT: @import_var = external dso_local global i32
  98 // PIE-DIRECT-NOPLT-NEXT: @weak_bar = extern_weak global i32
  99 // PIE-DIRECT-NOPLT-NEXT: @bar = external dso_local global i32
 100 // PIE-DIRECT-NOPLT-NEXT: @local_thread_var = dso_local thread_local global i32 42
 101 // PIE-DIRECT-NOPLT-NEXT: @thread_var = external thread_local global i32
 102 // PIE-DIRECT-NOPLT-DAG: declare void @foo()
 103 // PIE-DIRECT-NOPLT-DAG: define dso_local ptr @zed()
 104 // PIE-DIRECT-NOPLT-DAG: declare void @import_func()
 105
 106 // RUN: %clang_cc1 -triple x86_64 -emit-llvm -pic-level 1 -pic-is-pie -fno-plt %s -o - | FileCheck --check-prefix=PIE-NO-PLT %s
 107 // RUN: %clang_cc1 -triple powerpc64le -emit-llvm -mrelocation-model static %s -o - | FileCheck --check-prefix=PIE-NO-PLT %s
 108 // PIE-NO-PLT:      @baz = dso_local global i32 42
 109 // PIE-NO-PLT-NEXT: @import_var = external global i32
 110 // PIE-NO-PLT-NEXT: @weak_bar = extern_weak global i32
 111 // PIE-NO-PLT-NEXT: @bar = external global i32
 112 // PIE-NO-PLT-NEXT: @local_thread_var = dso_local thread_local global i32 42
 113 // PIE-NO-PLT-NEXT: @thread_var = external thread_local global i32
 114 // PIE-NO-PLT-DAG:  declare void @import_func()
 115 // PIE-NO-PLT-DAG:  define dso_local ptr @zed()
 116 // PIE-NO-PLT-DAG:  declare void @foo()
 117
 118 /// -fdirect-access-external-data is currently ignored for -fPIC.
 119 // RUN: %clang_cc1 -triple x86_64 -emit-llvm -pic-level 2 %s -o - | FileCheck --check-prefix=SHARED %s
 120 // RUN: %clang_cc1 -triple x86_64 -emit-llvm -pic-level 2 -fdirect-access-external-data %s -o - | FileCheck --check-prefix=SHARED %s
 121 // SHARED-DAG: @bar = external global i32
 122 // SHARED-DAG: @weak_bar = extern_weak global i32
 123 // SHARED-DAG: declare void @foo()
 124 // SHARED-DAG: @baz ={{.*}} global i32 42
 125 // SHARED-DAG: define{{.*}} ptr @zed()
 126 // SHARED-DAG: @thread_var = external thread_local global i32
 127 // SHARED-DAG: @local_thread_var ={{.*}} thread_local global i32 42
 128
 129 int baz = 42;
 130 __attribute__((dllimport)) extern int import_var;
 131 __attribute__((weak)) extern int weak_bar;
 132 extern int bar;
 133 __attribute__((dllimport)) void import_func(void);
 134
 135 int *use_import(void) {
 136   import_func();
 137   return &import_var;
 138 }
 139
 140 void foo(void);
 141
 142 int *zed(void) {
 143   foo();
 144   return baz ? &weak_bar : &bar;
 145 }
 146
 147 __thread int local_thread_var = 42;
 148 extern __thread int thread_var;
 149 int *get_thread_var(int a) {
 150   return a ? &thread_var : &local_thread_var;
 151 }