clang/test/Sema/builtin-preserve-access-index.c

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