1 // RUN: %clang_cc1 -x c -triple x86_64-pc-linux-gnu -dwarf-version=4 -fsyntax-only -verify %s
2 
invalid1(const int * arg)3 const 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 
valid2(void)7 int valid2(void) {
8   return __builtin_preserve_access_index(1);
9 }
10 
invalid3(const int * arg)11 void *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 
invalid4(volatile const int * arg)15 const 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 
valid5(int * arg)19 int *valid5(int *arg) {
20   return __builtin_preserve_access_index(arg);
21 }
22 
valid6(const volatile int * arg)23 int valid6(const volatile int *arg) {
24   return *__builtin_preserve_access_index(arg);
25 }
26 
27 struct s { int a; int b; };
28 
valid7(struct s * arg)29 int valid7(struct s *arg) {
30   return *__builtin_preserve_access_index(&arg->b);
31 }
32 
valid8(struct s * arg)33 int valid8(struct s *arg) {
34   return __builtin_preserve_access_index(arg->a + arg->b);
35 }
36 
valid9(struct s * arg)37 int valid9(struct s *arg) {
38   return __builtin_preserve_access_index(({arg->a = 2; arg->b = 3; }));
39 }
40