clang/test/CodeGenCXX/multi-versioning-internal-linkage.cpp

   1 // RUN: %clang_cc1 -std=c++11 -triple x86_64-linux-gnu -emit-llvm %s -o - | FileCheck %s --check-prefix=LINUX
   2 // RUN: %clang_cc1 -std=c++11 -triple x86_64-windows-pc -emit-llvm %s -o - | FileCheck %s --check-prefix=WINDOWS
   3
   4 __attribute__((target("default"))) static int static_target() {
   5   return 0;
   6 }
   7 __attribute__((target("arch=sandybridge"))) static int static_target() {
   8   return 1;
   9 }
  10
  11 __attribute__((cpu_dispatch(atom, generic))) static int static_dispatch() {}
  12
  13 namespace {
  14 int __attribute__((target("default"))) anon_target() {
  15   return 0;
  16 }
  17 int __attribute__((target("arch=sandybridge"))) anon_target() {
  18   return 1;
  19 }
  20 __attribute__((cpu_dispatch(atom, generic))) static int anon_dispatch() {}
  21 }
  22
  23
  24
  25 int usage() {
  26   return static_target() + anon_target() + static_dispatch() + anon_dispatch();
  27 }
  28
  29 // Ensure that these are all 'internal'. Windows doesn't have ifuncs or aliases,
  30 // since Windows doesn't support ifuncs.
  31 // aliases:
  32 // LINUX: @_ZL15static_dispatchv = internal alias i32 (), ptr @_ZL15static_dispatchv.ifunc
  33 // LINUX: @_ZN12_GLOBAL__N_113anon_dispatchEv = internal alias i32 (), ptr @_ZN12_GLOBAL__N_113anon_dispatchEv.ifunc
  34
  35 // ifuncs:
  36 // LINUX: @_ZL15static_dispatchv.ifunc = internal ifunc i32 (), ptr @_ZL15static_dispatchv.resolver
  37 // LINUX: @_ZN12_GLOBAL__N_113anon_dispatchEv.ifunc = internal ifunc i32 (), ptr @_ZN12_GLOBAL__N_113anon_dispatchEv.resolver
  38 // LINUX: @_ZL13static_targetv.ifunc = internal ifunc i32 (), ptr @_ZL13static_targetv.resolver
  39 // LINUX: @_ZN12_GLOBAL__N_111anon_targetEv.ifunc = internal ifunc i32 (), ptr @_ZN12_GLOBAL__N_111anon_targetEv.resolver
  40
  41 // resolvers:
  42 // LINUX: define internal ptr @_ZL15static_dispatchv.resolver()
  43 // WINDOWS: define internal i32 @"?static_dispatch@@YAHXZ"()
  44 // LINUX: define internal ptr @_ZN12_GLOBAL__N_113anon_dispatchEv.resolver()
  45 // WINDOWS: define internal i32 @"?anon_dispatch{{.*}}@@YAHXZ"()
  46 // LINUX: define internal ptr @_ZL13static_targetv.resolver()
  47 // WINDOWS: define internal i32 @"?static_target@@YAHXZ.resolver"()
  48 // LINUX: define internal ptr @_ZN12_GLOBAL__N_111anon_targetEv.resolver()
  49 // WINDOWS: define internal i32 @"?anon_target{{.*}}@@YAHXZ.resolver"()