40 lines · c
1// RUN: %clang_cc1 -x c -triple x86_64-pc-linux-gnu -dwarf-version=4 -fsyntax-only -verify %s2 3const void *invalid1(const int *arg) {4 return __builtin_preserve_access_index(&arg[1], 1); // expected-error {{too many arguments to function call, expected 1, have 2}}5}6 7int valid2(void) {8 return __builtin_preserve_access_index(1);9}10 11void *invalid3(const int *arg) {12 return __builtin_preserve_access_index(&arg[1]); // expected-warning {{returning 'const int *' from a function with result type 'void *' discards qualifiers}}13}14 15const void *invalid4(volatile const int *arg) {16 return __builtin_preserve_access_index(arg); // expected-warning {{returning 'const volatile int *' from a function with result type 'const void *' discards qualifiers}}17}18 19int *valid5(int *arg) {20 return __builtin_preserve_access_index(arg);21}22 23int valid6(const volatile int *arg) {24 return *__builtin_preserve_access_index(arg);25}26 27struct s { int a; int b; };28 29int valid7(struct s *arg) {30 return *__builtin_preserve_access_index(&arg->b);31}32 33int valid8(struct s *arg) {34 return __builtin_preserve_access_index(arg->a + arg->b);35}36 37int valid9(struct s *arg) {38 return __builtin_preserve_access_index(({arg->a = 2; arg->b = 3; }));39}40