1// RUN: %clang_cc1 %s -fsyntax-only -verify -pedantic -Wstrlcpy-strlcat-size -Wno-string-plus-int -triple=i686-apple-darwin9
2// This test needs to set the target because it uses __builtin_ia32_vec_ext_v4si
3
4int test1(float a, int b) {
5  return __builtin_isless(a, b); // expected-note {{declared here}}
6}
7int test2(int a, int b) {
8  return __builtin_islessequal(a, b);  // expected-error {{floating point type}}
9}
10
11int test3(double a, float b) {
12  return __builtin_isless(a, b);
13}
14int test4(int* a, double b) {
15  return __builtin_islessequal(a, b);  // expected-error {{floating point type}}
16}
17
18int test5(float a, long double b) {
19  return __builtin_isless(a, b, b);  // expected-error {{too many arguments}}
20}
21int test6(float a, long double b) {
22  return __builtin_islessequal(a);  // expected-error {{too few arguments}}
23}
24
25
26#define CFSTR __builtin___CFStringMakeConstantString
27void test7() {
28  const void *X;
29  X = CFSTR("\242"); // expected-warning {{input conversion stopped}}
30  X = CFSTR("\0"); // no-warning
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
38void 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 a GNU 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// overloaded atomics should be declared only once.
55void test9_1(volatile int* ptr, int val) {
56  __sync_fetch_and_add_4(ptr, val);
57}
58void test9_2(volatile int* ptr, int val) {
59  __sync_fetch_and_add(ptr, val);
60}
61void test9_3(volatile int* ptr, int val) {
62  __sync_fetch_and_add_4(ptr, val);
63  __sync_fetch_and_add(ptr, val);
64  __sync_fetch_and_add(ptr, val);
65  __sync_fetch_and_add_4(ptr, val);
66  __sync_fetch_and_add_4(ptr, val);
67}
68
69void test9_4(volatile int* ptr, int val) {
70  // expected-warning@+1 {{the semantics of this intrinsic changed with GCC version 4.4 - the newer semantics are provided here}}
71  __sync_fetch_and_nand(ptr, val);
72}
73
74// rdar://7236819
75void test10(void) __attribute__((noreturn));
76
77void test10(void) {
78  __asm__("int3");
79  __builtin_unreachable();
80
81  // No warning about falling off the end of a noreturn function.
82}
83
84void test11(int X) {
85  switch (X) {
86  case __builtin_eh_return_data_regno(0):  // constant foldable.
87    break;
88  }
89
90  __builtin_eh_return_data_regno(X);  // expected-error {{argument to '__builtin_eh_return_data_regno' must be a constant integer}}
91}
92
93// PR5062
94void test12(void) __attribute__((__noreturn__));
95void test12(void) {
96  __builtin_trap();  // no warning because trap is noreturn.
97}
98
99void test_unknown_builtin(int a, int b) {
100  __builtin_isles(a, b); // expected-error{{use of unknown builtin}} \
101                         // expected-note{{did you mean '__builtin_isless'?}}
102}
103
104int test13() {
105  __builtin_eh_return(0, 0); // no warning, eh_return never returns.
106}
107
108// <rdar://problem/8228293>
109void test14() {
110  int old;
111  old = __sync_fetch_and_min((volatile int *)&old, 1);
112}
113
114// <rdar://problem/8336581>
115void test15(const char *s) {
116  __builtin_printf("string is %s\n", s);
117}
118
119// PR7885
120int test16() {
121  return __builtin_constant_p() + // expected-error{{too few arguments}}
122         __builtin_constant_p(1, 2); // expected-error {{too many arguments}}
123}
124
125const int test17_n = 0;
126const char test17_c[] = {1, 2, 3, 0};
127const char test17_d[] = {1, 2, 3, 4};
128typedef int __attribute__((vector_size(16))) IntVector;
129struct Aggregate { int n; char c; };
130enum Enum { EnumValue1, EnumValue2 };
131
132typedef __typeof(sizeof(int)) size_t;
133size_t strlen(const char *);
134
135void test17() {
136#define ASSERT(...) { int arr[(__VA_ARGS__) ? 1 : -1]; }
137#define T(...) ASSERT(__builtin_constant_p(__VA_ARGS__))
138#define F(...) ASSERT(!__builtin_constant_p(__VA_ARGS__))
139
140  // __builtin_constant_p returns 1 if the argument folds to:
141  //  - an arithmetic constant with value which is known at compile time
142  T(test17_n);
143  T(&test17_c[3] - test17_c);
144  T(3i + 5); // expected-warning {{imaginary constant}}
145  T(4.2 * 7.6);
146  T(EnumValue1);
147  T((enum Enum)(int)EnumValue2);
148
149  //  - the address of the first character of a string literal, losslessly cast
150  //    to any type
151  T("string literal");
152  T((double*)"string literal");
153  T("string literal" + 0);
154  T((long)"string literal");
155
156  // ... and otherwise returns 0.
157  F("string literal" + 1);
158  F(&test17_n);
159  F(test17_c);
160  F(&test17_c);
161  F(&test17_d);
162  F((struct Aggregate){0, 1});
163  F((IntVector){0, 1, 2, 3});
164
165  // Ensure that a technique used in glibc is handled correctly.
166#define OPT(...) (__builtin_constant_p(__VA_ARGS__) && strlen(__VA_ARGS__) < 4)
167  // FIXME: These are incorrectly treated as ICEs because strlen is treated as
168  // a builtin.
169  ASSERT(OPT("abc"));
170  ASSERT(!OPT("abcd"));
171  // In these cases, the strlen is non-constant, but the __builtin_constant_p
172  // is 0: the array size is not an ICE but is foldable.
173  ASSERT(!OPT(test17_c));        // expected-warning {{folded}}
174  ASSERT(!OPT(&test17_c[0]));    // expected-warning {{folded}}
175  ASSERT(!OPT((char*)test17_c)); // expected-warning {{folded}}
176  ASSERT(!OPT(test17_d));        // expected-warning {{folded}}
177  ASSERT(!OPT(&test17_d[0]));    // expected-warning {{folded}}
178  ASSERT(!OPT((char*)test17_d)); // expected-warning {{folded}}
179
180#undef OPT
181#undef T
182#undef F
183}
184
185void test18() {
186  char src[1024];
187  char dst[2048];
188  size_t result;
189  void *ptr;
190
191  ptr = __builtin___memccpy_chk(dst, src, '\037', sizeof(src), sizeof(dst));
192  result = __builtin___strlcpy_chk(dst, src, sizeof(dst), sizeof(dst));
193  result = __builtin___strlcat_chk(dst, src, sizeof(dst), sizeof(dst));
194
195  ptr = __builtin___memccpy_chk(dst, src, '\037', sizeof(src));      // expected-error {{too few arguments to function call}}
196  ptr = __builtin___strlcpy_chk(dst, src, sizeof(dst), sizeof(dst)); // expected-warning {{incompatible integer to pointer conversion}}
197  ptr = __builtin___strlcat_chk(dst, src, sizeof(dst), sizeof(dst)); // expected-warning {{incompatible integer to pointer conversion}}
198}
199
200void no_ms_builtins() {
201  __assume(1); // expected-warning {{implicit declaration}}
202  __noop(1); // expected-warning {{implicit declaration}}
203  __debugbreak(); // expected-warning {{implicit declaration}}
204}
205
206void unavailable() {
207  __builtin_operator_new(0); // expected-error {{'__builtin_operator_new' is only available in C++}}
208  __builtin_operator_delete(0); // expected-error {{'__builtin_operator_delete' is only available in C++}}
209}
210
211// rdar://18259539
212size_t strlcpy(char * restrict dst, const char * restrict src, size_t size);
213size_t strlcat(char * restrict dst, const char * restrict src, size_t size);
214
215void Test19(void)
216{
217        static char b[40];
218        static char buf[20];
219
220        strlcpy(buf, b, sizeof(b)); // expected-warning {{size argument in 'strlcpy' call appears to be size of the source; expected the size of the destination}} \\
221                                    // expected-note {{change size argument to be the size of the destination}}
222        __builtin___strlcpy_chk(buf, b, sizeof(b), __builtin_object_size(buf, 0)); // expected-warning {{size argument in '__builtin___strlcpy_chk' call appears to be size of the source; expected the size of the destination}} \
223                                    // expected-note {{change size argument to be the size of the destination}} \
224				    // expected-warning {{'__builtin___strlcpy_chk' will always overflow destination buffer}}
225
226        strlcat(buf, b, sizeof(b)); // expected-warning {{size argument in 'strlcat' call appears to be size of the source; expected the size of the destination}} \
227                                    // expected-note {{change size argument to be the size of the destination}}
228
229        __builtin___strlcat_chk(buf, b, sizeof(b), __builtin_object_size(buf, 0)); // expected-warning {{size argument in '__builtin___strlcat_chk' call appears to be size of the source; expected the size of the destination}} \
230                                                                                   // expected-note {{change size argument to be the size of the destination}} \
231				                                                   // expected-warning {{'__builtin___strlcat_chk' will always overflow destination buffer}}
232}
233
234// rdar://11076881
235char * Test20(char *p, const char *in, unsigned n)
236{
237    static char buf[10];
238
239    __builtin___memcpy_chk (&buf[6], in, 5, __builtin_object_size (&buf[6], 0)); // expected-warning {{'__builtin___memcpy_chk' will always overflow destination buffer}}
240
241    __builtin___memcpy_chk (p, "abcde", n, __builtin_object_size (p, 0));
242
243    __builtin___memcpy_chk (&buf[5], "abcde", 5, __builtin_object_size (&buf[5], 0));
244
245    __builtin___memcpy_chk (&buf[5], "abcde", n, __builtin_object_size (&buf[5], 0));
246
247    __builtin___memcpy_chk (&buf[6], "abcde", 5, __builtin_object_size (&buf[6], 0)); // expected-warning {{'__builtin___memcpy_chk' will always overflow destination buffer}}
248
249    return buf;
250}
251