clang/test/CodeGen/visibility.c

// RUN: %clang_cc1 %s -triple i386-unknown-unknown -Wno-implicit-function-declaration -fvisibility=default -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-DEFAULT
// RUN: %clang_cc1 %s -triple i386-unknown-unknown -Wno-implicit-function-declaration -fvisibility=protected -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-PROTECTED
// RUN: %clang_cc1 %s -triple i386-unknown-unknown -Wno-implicit-function-declaration -fvisibility=hidden -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-HIDDEN

// CHECK-DEFAULT: @g_def ={{.*}} global i32 0
// CHECK-DEFAULT: @g_com ={{.*}} global i32 0
// CHECK-DEFAULT: @g_ext = external global i32
// CHECK-DEFAULT: @g_deferred = internal global
// CHECK-PROTECTED: @g_def = protected global i32 0
// CHECK-PROTECTED: @g_com = protected global i32 0
// CHECK-PROTECTED: @g_ext = external global i32
// CHECK-PROTECTED: @g_deferred = internal global
// CHECK-HIDDEN: @g_def = hidden global i32 0
// CHECK-HIDDEN: @g_com = hidden global i32 0
// CHECK-HIDDEN: @g_ext = external global i32
// CHECK-HIDDEN: @g_deferred = internal global
int g_com;
int g_def = 0;
extern int g_ext;
static char g_deferred[] = "hello";

// CHECK-DEFAULT: @test4 = hidden global i32 10
// CHECK-PROTECTED: @test4 = hidden global i32 10
// CHECK-HIDDEN: @test4 = hidden global i32 10

// CHECK-DEFAULT-LABEL: define{{.*}} i32 @f_def()
// CHECK-DEFAULT: declare void @f_ext()
// CHECK-DEFAULT-LABEL: define internal void @f_deferred()
// CHECK-PROTECTED-LABEL: define protected i32 @f_def()
// CHECK-PROTECTED: declare void @f_ext()
// CHECK-PROTECTED-LABEL: define internal void @f_deferred()
// CHECK-HIDDEN-LABEL: define hidden i32 @f_def()
// CHECK-HIDDEN: declare void @f_ext()
// CHECK-HIDDEN-LABEL: define internal void @f_deferred()

extern void f_ext(void);

static void f_deferred(void) {
}

int f_def(void) {
  f_ext();
  f_deferred();
  return g_com + g_def + g_ext + g_deferred[0];
}

// PR8457
// CHECK-DEFAULT-LABEL: define{{.*}} void @test1(
// CHECK-PROTECTED-LABEL: define{{.*}} void @test1(
// CHECK-HIDDEN-LABEL: define{{.*}} void @test1(
struct Test1 { int field; };
void  __attribute__((visibility("default"))) test1(struct Test1 *v) { }

// CHECK-DEFAULT-LABEL: define{{.*}} void @test2()
// CHECK-PROTECTED-LABEL: define{{.*}} void @test2()
// CHECK-HIDDEN-LABEL: define{{.*}} void @test2()
void test2(void);
void __attribute__((visibility("default"))) test2(void) {}

// CHECK-DEFAULT-LABEL: define hidden void @test3()
// CHECK-PROTECTED-LABEL: define hidden void @test3()
// CHECK-HIDDEN-LABEL: define hidden void @test3()
extern void test3(void);
__private_extern__ void test3(void) {}

// Top of file.
extern int test4;
__private_extern__ int test4 = 10;

// CHECK-DEFAULT-LABEL: define hidden void @test5()
// CHECK-PROTECTED-LABEL: define hidden void @test5()
// CHECK-HIDDEN-LABEL: define hidden void @test5()
__attribute__((availability(macosx,introduced=10.5,deprecated=10.6)))
__private_extern__ void test5(void) {}


#pragma clang attribute push([[gnu::visibility("hidden")]], apply_to=function)

// CHECK-DEFAULT-LABEL: define hidden void @func()
// CHECK-PROTECTED-LABEL: define hidden void @func()
// CHECK-HIDDEN-LABEL: define hidden void @func()
void func(void) {}

void call(void) {
  implicit_function();
  // CHECK-DEFAULT-LABEL: declare hidden i32 @implicit_function(...)
  // CHECK-PROTECTED-LABEL: declare hidden i32 @implicit_function(...)
  // CHECK-HIDDEN-LABEL: declare hidden i32 @implicit_function(...)
}

#pragma clang attribute pop

void call2(void) {
  implicit_function2();
  // CHECK-DEFAULT-LABEL: declare i32 @implicit_function2(...)
  // CHECK-PROTECTED-LABEL: declare i32 @implicit_function2(...)
  // CHECK-HIDDEN-LABEL: declare i32 @implicit_function2(...)
}