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// RUN: rm -rf %t
// RUN: mkdir %t
// RUN: split-file %s %t
//
// RUN: %clang_cc1 -std=c++20 %t/Module.cppm -triple %itanium_abi_triple -emit-llvm -o - | FileCheck %t/Module.cppm --implicit-check-not unused
//
// RUN: %clang_cc1 -std=c++20 %t/Module.cppm -triple %itanium_abi_triple -emit-module-interface -o %t/Module.pcm
// RUN: %clang_cc1 -std=c++20 %t/module.cpp -triple %itanium_abi_triple -fmodule-file=Module=%t/Module.pcm -emit-llvm -o - | FileCheck %t/module.cpp --implicit-check-not=unused --implicit-check-not=global_module
//
// RUN: %clang_cc1 -std=c++20 %t/user.cpp -triple %itanium_abi_triple -fmodule-file=Module=%t/Module.pcm -emit-llvm -o - | FileCheck %t/user.cpp --implicit-check-not=unused --implicit-check-not=global_module
//--- Module.cppm
// CHECK-DAG: @extern_var_global_module = external {{(dso_local )?}}global
// CHECK-DAG: @inline_var_global_module = linkonce_odr {{(dso_local )?}}global
// CHECK-DAG: @_ZL24static_var_global_module = internal global
// CHECK-DAG: @_ZL23const_var_global_module = internal constant
//
// With strong-ownership, the module is mangled into exported symbols
// that are attached to a named module.
// CHECK-DAG: @_ZW6Module19extern_var_exported = external {{(dso_local )?}}global
// FIXME: Should this be 'weak_odr global'? Presumably it must be, since we
// can discard this global and its initializer (if any), and other TUs are not
// permitted to run the initializer for this variable.
// CHECK-DAG: @_ZW6Module19inline_var_exported = linkonce_odr {{(dso_local )?}}global
// CHECK-DAG: @_ZW6Module18const_var_exported = {{(dso_local )?}}constant
//
// CHECK-DAG: @_ZW6Module25extern_var_module_linkage = external {{(dso_local )?}}global
// FIXME: Should this be 'weak_odr global'? Presumably it must be, since we
// can discard this global and its initializer (if any), and other TUs are not
// permitted to run the initializer for this variable.
// CHECK-DAG: @_ZW6Module25inline_var_module_linkage = linkonce_odr {{(dso_local )?}}global
// CHECK-DAG: @_ZL25static_var_module_linkage = internal
// CHECK-DAG: @_ZW6Module24const_var_module_linkage = {{(dso_local )?}}constant
//
// CHECK-DAG: @_ZW6Module25unused_var_module_linkage = {{(dso_local )?}}global i32 4
module;
static void unused_static_global_module() {}
static void used_static_global_module() {}
inline void unused_inline_global_module() {}
inline void used_inline_global_module() {}
extern int extern_var_global_module;
inline int inline_var_global_module;
static int static_var_global_module;
const int const_var_global_module = 3;
// CHECK: define {{(dso_local )?}}void {{.*}}@_Z23noninline_global_modulev
void noninline_global_module() {
// FIXME: This should be promoted to module linkage and given a
// module-mangled name, if it's called from an inline function within
// the module interface.
// (We should try to avoid this when it's not reachable from outside
// the module interface unit.)
// CHECK: define internal {{.*}}@_ZL25used_static_global_modulev
used_static_global_module();
// CHECK: define linkonce_odr {{.*}}@_Z25used_inline_global_modulev
used_inline_global_module();
(void)&extern_var_global_module;
(void)&inline_var_global_module;
(void)&static_var_global_module;
(void)&const_var_global_module;
}
export module Module;
export {
inline void unused_inline_exported() {}
inline void used_inline_exported() {}
extern int extern_var_exported;
inline int inline_var_exported;
const int const_var_exported = 3;
// CHECK: define {{(dso_local )?}}void {{.*}}@_ZW6Module18noninline_exportedv
void noninline_exported() {
(void)&extern_var_exported;
(void)&inline_var_exported;
(void)&const_var_exported;
}
}
static void unused_static_module_linkage() {}
static void used_static_module_linkage() {}
inline void unused_inline_module_linkage() {}
inline void used_inline_module_linkage() {}
extern int extern_var_module_linkage;
inline int inline_var_module_linkage;
static int static_var_module_linkage;
const int const_var_module_linkage = 3;
// CHECK: define {{(dso_local )?}}void {{.*}}@_ZW6Module24noninline_module_linkagev
// CHECK: define {{.*}}void {{.*}}@_ZL26used_static_module_linkagev
void noninline_module_linkage() {
used_static_module_linkage();
// CHECK: define linkonce_odr {{.*}}@_ZW6Module26used_inline_module_linkagev
used_inline_module_linkage();
(void)&extern_var_module_linkage;
(void)&inline_var_module_linkage;
(void)&static_var_module_linkage;
(void)&const_var_module_linkage;
}
int unused_var_module_linkage = 4;
static int unused_static_var_module_linkage = 5;
inline int unused_inline_var_module_linkage = 6;
const int unused_const_var_module_linkage = 7;
struct a {
struct b {};
struct c {};
};
// CHECK: define {{(dso_local )?}}void @_ZW6Module1fNS_1a1bENS0_1cE(
void f(a::b, a::c) {}
//--- module.cpp
// CHECK-DAG: @_ZW6Module19extern_var_exported = external {{(dso_local )?}}global
// CHECK-DAG: @_ZW6Module19inline_var_exported = linkonce_odr {{(dso_local )?}}global
// CHECK-DAG: @_ZW6Module18const_var_exported = available_externally {{(dso_local )?}}constant i32 3,
//
// CHECK-DAG: @_ZW6Module25extern_var_module_linkage = external {{(dso_local )?}}global
// CHECK-DAG: @_ZW6Module25inline_var_module_linkage = linkonce_odr {{(dso_local )?}}global
// CHECK-DAG: @_ZW6Module24const_var_module_linkage = available_externally {{(dso_local )?}}constant i32 3,
module Module;
void use() {
// CHECK: define linkonce_odr {{.*}}@_ZW6Module20used_inline_exportedv
used_inline_exported();
// CHECK: declare {{.*}}@_ZW6Module18noninline_exportedv
noninline_exported();
(void)&extern_var_exported;
(void)&inline_var_exported;
(void)&const_var_exported;
// CHECK: define linkonce_odr {{.*}}@_ZW6Module26used_inline_module_linkagev
used_inline_module_linkage();
// CHECK: declare {{.*}}@_ZW6Module24noninline_module_linkagev
noninline_module_linkage();
(void)&extern_var_module_linkage;
(void)&inline_var_module_linkage;
(void)&const_var_module_linkage; // FIXME: will be visible after P2788R0
}
//--- user.cpp
// CHECK-DAG: @_ZW6Module19extern_var_exported = external {{(dso_local )?}}global
// CHECK-DAG: @_ZW6Module19inline_var_exported = linkonce_odr {{(dso_local )?}}global
// CHECK-DAG: @_ZW6Module18const_var_exported = available_externally {{(dso_local )?}}constant i32 3
import Module;
void use() {
// CHECK: define linkonce_odr {{.*}}@_ZW6Module20used_inline_exportedv
used_inline_exported();
// CHECK: declare {{.*}}@_ZW6Module18noninline_exportedv
noninline_exported();
(void)&extern_var_exported;
(void)&inline_var_exported;
(void)&const_var_exported;
// Internal-linkage declarations are not visible here.
// Module-linkage declarations are not visible here.
}
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