clang/test/Parser/stmt-attributes.c

   1 // RUN: %clang_cc1 -fsyntax-only -verify %s
   2
   3 #if !__has_extension(statement_attributes_with_gnu_syntax)
   4 #error "We should have statement attributes with GNU syntax support"
   5 #endif
   6
   7 void foo(int i) {
   8
   9   __attribute__((unknown_attribute)); // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
  10   __attribute__(()) {}
  11   __attribute__(()) if (0) {}
  12   __attribute__(()) for (;;);
  13   __attribute__(()) do {
  14     __attribute__(()) continue;
  15   }
  16   while (0)
  17     ;
  18   __attribute__(()) while (0);
  19
  20   __attribute__(()) switch (i) {
  21     __attribute__(()) case 0 :
  22     __attribute__(()) default :
  23     __attribute__(()) break;
  24   }
  25
  26   __attribute__(()) goto here;
  27   __attribute__(()) here :
  28
  29   __attribute__(()) return;
  30
  31   __attribute__((noreturn)) {}             // expected-error {{'noreturn' attribute cannot be applied to a statement}}
  32   __attribute__((noreturn)) if (0) {}      // expected-error {{'noreturn' attribute cannot be applied to a statement}}
  33   __attribute__((noreturn)) for (;;);      // expected-error {{'noreturn' attribute cannot be applied to a statement}}
  34   __attribute__((noreturn)) do {           // expected-error {{'noreturn' attribute cannot be applied to a statement}}
  35     __attribute__((unavailable)) continue; // expected-error {{'unavailable' attribute cannot be applied to a statement}}
  36   }
  37   while (0)
  38     ;
  39   __attribute__((unknown_attribute)) while (0); // expected-warning {{unknown attribute 'unknown_attribute' ignored}}
  40
  41   __attribute__((unused)) switch (i) {         // expected-error {{'unused' attribute cannot be applied to a statement}}
  42   __attribute__((uuid)) case 0:                // expected-warning {{unknown attribute 'uuid' ignored}}
  43   __attribute__((visibility(""))) default:         // expected-error {{'visibility' attribute cannot be applied to a statement}}
  44     __attribute__((carries_dependency)) break; // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
  45   }
  46
  47   __attribute__((fastcall)) goto there; // expected-error {{'fastcall' attribute cannot be applied to a statement}}
  48   __attribute__((noinline)) there :     // expected-warning {{'noinline' attribute only applies to functions and statements}}
  49
  50                                     __attribute__((weakref)) return; // expected-error {{'weakref' attribute only applies to variables and functions}}
  51
  52   __attribute__((carries_dependency));            // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
  53   __attribute__((carries_dependency)) {}          // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
  54   __attribute__((carries_dependency)) if (0) {}   // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
  55   __attribute__((carries_dependency)) for (;;);   // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
  56   __attribute__((carries_dependency)) do {        // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
  57     __attribute__((carries_dependency)) continue; // expected-error {{'carries_dependency' attribute cannot be applied to a statement}} ignored}}
  58   }
  59   while (0)
  60     ;
  61   __attribute__((carries_dependency)) while (0); // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
  62
  63   __attribute__((carries_dependency)) switch (i) { // expected-error {{'carries_dependency' attribute cannot be applied to a statement}} ignored}}
  64   __attribute__((carries_dependency)) case 0:      // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
  65   __attribute__((carries_dependency)) default:     // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
  66     __attribute__((carries_dependency)) break;     // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
  67   }
  68
  69   __attribute__((carries_dependency)) goto here; // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
  70
  71   __attribute__((carries_dependency)) return; // expected-error {{'carries_dependency' attribute cannot be applied to a statement}}
  72 }
  73
  74 void bar(void);
  75
  76 void foobar(void) {
  77   __attribute__((nomerge)) bar();
  78   __attribute__(()) bar();                // expected-error {{expected identifier or '('}}
  79   __attribute__((unused, nomerge)) bar(); // expected-error {{expected identifier or '('}}
  80   __attribute__((nomerge, unused)) bar(); // expected-error {{expected identifier or '('}}
  81   __attribute__((nomerge(1, 2))) bar();   // expected-error {{'nomerge' attribute takes no arguments}}
  82   int x;
  83   __attribute__((nomerge)) x = 10; // expected-warning {{'nomerge' attribute is ignored because there exists no call expression inside the statement}}
  84
  85   __attribute__((nomerge)) label : bar(); // expected-error {{'nomerge' attribute only applies to functions, statements and variables}}
  86 }
  87
  88 int f(void);
  89
  90 __attribute__((nomerge)) static int (*fptr)(void);
  91 __attribute__((nomerge)) static int i; // expected-warning {{'nomerge' attribute is ignored because 'i' is not a function pointer}}
  92 struct buz {} __attribute__((nomerge)); // expected-error {{'nomerge' attribute only applies to functions, statements and variables}}