|  | // RUN: %clang_cc1 -std=c++2a -fblocks %s -triple %itanium_abi_triple -emit-llvm -o %t.ll | 
|  | // RUN: FileCheck --input-file %t.ll %s | 
|  |  | 
|  | namespace test_func { | 
|  |  | 
|  | constexpr const char *test_default_arg(const char *f = __builtin_FUNCTION()) { | 
|  | return f; | 
|  | } | 
|  | // CHECK: @[[EMPTY_STR:.+]] = private unnamed_addr constant [1 x i8] zeroinitializer | 
|  |  | 
|  | // CHECK: @_ZN9test_func6globalE = {{(dso_local )?}}global ptr @[[EMPTY_STR]] | 
|  | const char *global = test_default_arg(); | 
|  |  | 
|  | // CHECK: @_ZN9test_func10global_twoE = {{(dso_local )?}}global ptr @[[EMPTY_STR]] | 
|  | const char *global_two = __builtin_FUNCTION(); | 
|  |  | 
|  | const char * const global_three = test_default_arg(); | 
|  |  | 
|  | // CHECK: @[[STR_ONE:.+]] = private unnamed_addr constant [14 x i8] c"test_func_one\00" | 
|  | // CHECK: @[[STR_TWO:.+]] = private unnamed_addr constant [14 x i8] c"test_func_two\00" | 
|  | // CHECK: @[[STR_THREE:.+]] = private unnamed_addr constant [20 x i8] c"do_default_arg_test\00" | 
|  |  | 
|  | // CHECK: define {{(dso_local )?}}noundef ptr @_ZN9test_func13test_func_oneEv() | 
|  | // CHECK: ret ptr @[[STR_ONE]] | 
|  | const char *test_func_one() { | 
|  | return __builtin_FUNCTION(); | 
|  | } | 
|  |  | 
|  | // CHECK: define {{(dso_local )?}}noundef ptr @_ZN9test_func13test_func_twoEv() | 
|  | // CHECK: ret ptr @[[STR_TWO]] | 
|  | const char *test_func_two() { | 
|  | return __builtin_FUNCTION(); | 
|  | } | 
|  |  | 
|  | // CHECK: define {{(dso_local )?}}void @_ZN9test_func19do_default_arg_testEv() | 
|  | // CHECK: %call = call noundef ptr @_ZN9test_func16test_default_argEPKc(ptr noundef @[[STR_THREE]]) | 
|  | void do_default_arg_test() { | 
|  | test_default_arg(); | 
|  | } | 
|  |  | 
|  | } // namespace test_func |