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llvm-project/clang/test/CodeGen/set-visibility-for-decls.c

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Add -fapply-global-visibility-to-externs for -cc1 Introduce an option to request global visibility settings be applied to declarations without a definition or an explicit visibility, rather than the existing behavior of giving these default visibility. When the visibility of all or most extern definitions are known this allows for the same optimisations -fvisibility permits without updating source code to annotate all declarations. Differential Revision: https://reviews.llvm.org/D56868 llvm-svn: 352391
2019-01-29 01:12:19 +08:00
// RUN: %clang_cc1 %s -std=c11 -triple=x86_64-pc-linux -fvisibility hidden -fapply-global-visibility-to-externs -emit-llvm -o - | FileCheck --check-prefix=CHECK-HIDDEN %s
// RUN: %clang_cc1 %s -std=c11 -triple=x86_64-pc-linux -fvisibility protected -fapply-global-visibility-to-externs -emit-llvm -o - | FileCheck --check-prefix=CHECK-PROTECTED %s
// RUN: %clang_cc1 %s -std=c11 -triple=x86_64-pc-linux -fvisibility default -fapply-global-visibility-to-externs -emit-llvm -o - | FileCheck --check-prefix=CHECK-DEFAULT %s
// CHECK-HIDDEN: @var_hidden = external hidden global
// CHECK-PROTECTED: @var_hidden = external hidden global
// CHECK-DEFAULT: @var_hidden = external hidden global
__attribute__((visibility("hidden"))) extern int var_hidden;
// CHECK-HIDDEN: @var_protected = external protected global
// CHECK-PROTECTED: @var_protected = external protected global
// CHECK-DEFAULT: @var_protected = external protected global
__attribute__((visibility("protected"))) extern int var_protected;
// CHECK-HIDDEN: @var_default = external global
// CHECK-PROTECTED: @var_default = external global
// CHECK-DEFAULT: @var_default = external global
__attribute__((visibility("default"))) extern int var_default;
// CHECK-HIDDEN: @var = external hidden global
// CHECK-PROTECTED: @var = external protected global
// CHECK-DEFAULT: @var = external global
extern int var;
// CHECK-HIDDEN: declare hidden i32 @func_hidden()
// CHECK-PROTECTED: declare hidden i32 @func_hidden()
// CHECK-DEFAULT: declare hidden i32 @func_hidden()
__attribute__((visibility("hidden"))) int func_hidden(void);
// CHECK-HIDDEN: declare protected i32 @func_protected()
// CHECK-PROTECTED: declare protected i32 @func_protected()
// CHECK-DEFAULT: declare protected i32 @func_protected()
__attribute__((visibility("protected"))) int func_protected(void);
// CHECK-HIDDEN: declare i32 @func_default()
// CHECK-PROTECTED: declare i32 @func_default()
// CHECK-DEFAULT: declare i32 @func_default()
__attribute__((visibility("default"))) int func_default(void);
// CHECK-HIDDEN: declare hidden i32 @func()
// CHECK-PROTECTED: declare protected i32 @func()
// CHECK-DEFAULT: declare i32 @func()
int func(void);
int use() {
return var_hidden + var_protected + var_default + var +
func_hidden() + func_protected() + func_default() + func();
}