test/Sema/builtins.c

   1 // RUN: %clang_cc1 %s -fsyntax-only -verify -pedantic -triple=i686-apple-darwin9
   2 // This test needs to set the target because it uses __builtin_ia32_vec_ext_v4si
   3
   4 int test1(float a, int b) {
   5   return __builtin_isless(a, b);
   6 }
   7 int test2(int a, int b) {
   8   return __builtin_islessequal(a, b);  // expected-error {{floating point type}}
   9 }
  10
  11 int test3(double a, float b) {
  12   return __builtin_isless(a, b);
  13 }
  14 int test4(int* a, double b) {
  15   return __builtin_islessequal(a, b);  // expected-error {{floating point type}}
  16 }
  17
  18 int test5(float a, long double b) {
  19   return __builtin_isless(a, b, b);  // expected-error {{too many arguments}}
  20 }
  21 int test6(float a, long double b) {
  22   return __builtin_islessequal(a);  // expected-error {{too few arguments}}
  23 }
  24
  25
  26 #define CFSTR __builtin___CFStringMakeConstantString
  27 void test7() {
  28   const void *X;
  29   X = CFSTR("\242"); // expected-warning {{input conversion stopped}}
  30   X = CFSTR("\0"); // expected-warning {{ CFString literal contains NUL character }}
  31   X = CFSTR(242); // expected-error {{ CFString literal is not a string constant }} expected-warning {{incompatible integer to pointer conversion}}
  32   X = CFSTR("foo", "bar"); // expected-error {{too many arguments to function call}}
  33 }
  34
  35
  36 // atomics.
  37
  38 void test9(short v) {
  39   unsigned i, old;
  40
  41   old = __sync_fetch_and_add();  // expected-error {{too few arguments to function call}}
  42   old = __sync_fetch_and_add(&old);  // expected-error {{too few arguments to function call}}
  43   old = __sync_fetch_and_add((unsigned*)0, 42i); // expected-warning {{imaginary constants are an extension}}
  44
  45   // PR7600: Pointers are implicitly casted to integers and back.
  46   void *old_ptr = __sync_val_compare_and_swap((void**)0, 0, 0);
  47
  48   // Ensure the return type is correct even when implicit casts are stripped
  49   // away. This triggers an assertion while checking the comparison otherwise.
  50   if (__sync_fetch_and_add(&old, 1) == 1) {
  51   }
  52 }
  53
  54
  55 // rdar://7236819
  56 void test10(void) __attribute__((noreturn));
  57
  58 void test10(void) {
  59   __asm__("int3");
  60   __builtin_unreachable();
  61
  62   // No warning about falling off the end of a noreturn function.
  63 }
  64
  65 void test11(int X) {
  66   switch (X) {
  67   case __builtin_eh_return_data_regno(0):  // constant foldable.
  68     break;
  69   }
  70
  71   __builtin_eh_return_data_regno(X);  // expected-error {{argument to '__builtin_eh_return_data_regno' must be a constant integer}}
  72 }
  73
  74 // PR5062
  75 void test12(void) __attribute__((__noreturn__));
  76 void test12(void) {
  77   __builtin_trap();  // no warning because trap is noreturn.
  78 }
  79
  80 void test_unknown_builtin(int a, int b) {
  81   __builtin_foo(a, b); // expected-error{{use of unknown builtin}}
  82 }
  83
  84 int test13() {
  85   __builtin_eh_return(0, 0); // no warning, eh_return never returns.
  86 }
  87
  88 // <rdar://problem/8228293>
  89 void test14() {
  90   int old;
  91   old = __sync_fetch_and_min((volatile int *)&old, 1);
  92 }
  93
  94 // <rdar://problem/8336581>
  95 void test15(const char *s) {
  96   __builtin_printf("string is %s\n", s);
  97 }
  98
  99 // PR7885
 100 int test16() {
 101   return __builtin_constant_p() + // expected-error{{too few arguments}}
 102          __builtin_constant_p(1, 2); // expected-error {{too many arguments}}
 103 }
 104