// RUN: %clang_cc1 %s -fsyntax-only -verify -pedantic -Wstrlcpy-strlcat-size -Wno-string-plus-int -Wno-bit-int-extension -triple=i686-apple-darwin9
// This test needs to set the target because it uses __builtin_ia32_vec_ext_v4si
int test1(float a, int b) {
return __builtin_isless(a, b);
}
int test2(int a, int b) {
return __builtin_islessequal(a, b); // expected-error {{floating point type}}
}
int test3(double a, float b) {
return __builtin_isless(a, b);
}
int test4(int* a, double b) {
return __builtin_islessequal(a, b); // expected-error {{floating point type}}
}
int test5(float a, long double b) {
return __builtin_isless(a, b, b); // expected-error {{too many arguments}}
}
int test6(float a, long double b) {
return __builtin_islessequal(a); // expected-error {{too few arguments}}
}
#define CFSTR __builtin___CFStringMakeConstantString
void test7(void) {
const void *X;
X = CFSTR("\242"); // expected-warning {{input conversion stopped}}
X = CFSTR("\0"); // no-warning
X = CFSTR(242); // expected-error {{CFString literal is not a string constant}} expected-error {{incompatible integer to pointer conversion}}
X = CFSTR("foo", "bar"); // expected-error {{too many arguments to function call}}
}
// atomics.
void test9(short v) {
unsigned i, old;
old = __sync_fetch_and_add(); // expected-error {{too few arguments to function call}}
old = __sync_fetch_and_add(&old); // expected-error {{too few arguments to function call}}
old = __sync_fetch_and_add((unsigned*)0, 42i); // expected-warning {{imaginary constants are a GNU extension}}
// PR7600: Pointers are implicitly casted to integers and back.
void *old_ptr = __sync_val_compare_and_swap((void**)0, 0, 0);
// Ensure the return type is correct even when implicit casts are stripped
// away. This triggers an assertion while checking the comparison otherwise.
if (__sync_fetch_and_add(&old, 1) == 1) {
}
}
// overloaded atomics should be declared only once.
void test9_1(volatile int* ptr, int val) {
__sync_fetch_and_add_4(ptr, val);
}
void test9_2(volatile int* ptr, int val) {
__sync_fetch_and_add(ptr, val);
}
void test9_3(volatile int* ptr, int val) {
__sync_fetch_and_add_4(ptr, val);
__sync_fetch_and_add(ptr, val);
__sync_fetch_and_add(ptr, val);
__sync_fetch_and_add_4(ptr, val);
__sync_fetch_and_add_4(ptr, val);
}
void test9_4(volatile int* ptr, int val) {
// expected-warning@+1 {{the semantics of this intrinsic changed with GCC version 4.4 - the newer semantics are provided here}}
__sync_fetch_and_nand(ptr, val);
}
void test10(void) __attribute__((noreturn));
void test10(void) {
__asm__("int3");
__builtin_unreachable();
// No warning about falling off the end of a noreturn function.
}
void test11(int X) {
switch (X) {
case __builtin_eh_return_data_regno(0): // constant foldable.
break;
}
__builtin_eh_return_data_regno(X); // expected-error {{argument to '__builtin_eh_return_data_regno' must be a constant integer}}
}
// PR5062
void test12(void) __attribute__((__noreturn__));
void test12(void) {
__builtin_trap(); // no warning because trap is noreturn.
}
void test_unknown_builtin(int a, int b) {
__builtin_isles(a, b); // expected-error{{use of unknown builtin}}
}
int test13(void) {
__builtin_eh_return(0, 0); // no warning, eh_return never returns.
}
void test14(void) {
int old;
old = __sync_fetch_and_min((volatile int *)&old, 1);
}
void test15(const char *s) {
__builtin_printf("string is %s\n", s);
}
// PR7885
int test16(void) {
return __builtin_constant_p() + // expected-error{{too few arguments}}
__builtin_constant_p(1, 2); // expected-error {{too many arguments}}
}
// __builtin_constant_p cannot resolve non-constants as a file scoped array.
int expr;
char y[__builtin_constant_p(expr) ? -1 : 1]; // no warning, the builtin is false.
// no warning, the builtin is false.
struct foo { int a; };
struct foo x = (struct foo) { __builtin_constant_p(42) ? 37 : 927 };
const int test17_n = 0;
const char test17_c[] = {1, 2, 3, 0};
const char test17_d[] = {1, 2, 3, 4}; // Like test17_c but not NUL-terminated.
typedef int __attribute__((vector_size(16))) IntVector;
struct Aggregate { int n; char c; };
enum Enum { EnumValue1, EnumValue2 };
typedef __typeof(sizeof(int)) size_t;
size_t strlen(const char *);
void test17(void) {
#define ASSERT(...) { enum { folded = (__VA_ARGS__) }; int arr[folded ? 1 : -1]; }
#define T(...) ASSERT(__builtin_constant_p(__VA_ARGS__))
#define F(...) ASSERT(!__builtin_constant_p(__VA_ARGS__))
// __builtin_constant_p returns 1 if the argument folds to:
// - an arithmetic constant with value which is known at compile time
T(test17_n);
T(&test17_c[3] - test17_c);
T(3i + 5); // expected-warning {{imaginary constant}}
T(4.2 * 7.6);
T(EnumValue1);
T((enum Enum)(int)EnumValue2);
// - the address of the first character of a string literal, losslessly cast
// to any type
T("string literal");
T((double*)"string literal");
T("string literal" + 0);
T((long)"string literal");
// ... and otherwise returns 0.
F("string literal" + 1);
F(&test17_n);
F(test17_c);
F(&test17_c);
F(&test17_d);
F((struct Aggregate){0, 1});
F((IntVector){0, 1, 2, 3});
F(test17);
// Ensure that a technique used in glibc is handled correctly.
#define OPT(...) (__builtin_constant_p(__VA_ARGS__) && strlen(__VA_ARGS__) < 4)
// FIXME: These are incorrectly treated as ICEs because strlen is treated as
// a builtin.
ASSERT(OPT("abc")); // expected-warning {{expression is not an integer constant expression; folding it to a constant is a GNU extension}}
ASSERT(!OPT("abcd")); // expected-warning {{expression is not an integer constant expression; folding it to a constant is a GNU extension}}
// In these cases, the strlen is non-constant, but the __builtin_constant_p
// is 0: the array size is not an ICE but is foldable.
ASSERT(!OPT(test17_c));
ASSERT(!OPT(&test17_c[0]));
ASSERT(!OPT((char*)test17_c));
// NOTE: test17_d is not NUL-termintated, so calling strlen on it is UB.
ASSERT(!OPT(test17_d)); // expected-warning {{folding}}
ASSERT(!OPT(&test17_d[0])); // expected-warning {{folding}}
ASSERT(!OPT((char*)test17_d)); // expected-warning {{folding}}
#undef OPT
#undef T
#undef F
}
void test18(void) {
char src[1024];
char dst[2048];
size_t result;
void *ptr;
ptr = __builtin___memccpy_chk(dst, src, '\037', sizeof(src), sizeof(dst));
result = __builtin___strlcpy_chk(dst, src, sizeof(dst), sizeof(dst));
result = __builtin___strlcat_chk(dst, src, sizeof(dst), sizeof(dst));
ptr = __builtin___memccpy_chk(dst, src, '\037', sizeof(src)); // expected-error {{too few arguments to function call}}
ptr = __builtin___strlcpy_chk(dst, src, sizeof(dst), sizeof(dst)); // expected-error {{incompatible integer to pointer conversion}}
ptr = __builtin___strlcat_chk(dst, src, sizeof(dst), sizeof(dst)); // expected-error {{incompatible integer to pointer conversion}}
}
void no_ms_builtins(void) {
__assume(1); // expected-error {{call to undeclared function '__assume'; ISO C99 and later do not support implicit function declarations}}
__noop(1); // expected-error {{call to undeclared function '__noop'; ISO C99 and later do not support implicit function declarations}}
__debugbreak(); // expected-error {{call to undeclared function '__debugbreak'; ISO C99 and later do not support implicit function declarations}}
}
void unavailable(void) {
__builtin_operator_new(0); // expected-error {{'__builtin_operator_new' is only available in C++}}
__builtin_operator_delete(0); // expected-error {{'__builtin_operator_delete' is only available in C++}}
}
size_t strlcpy(char * restrict dst, const char * restrict src, size_t size);
size_t strlcat(char * restrict dst, const char * restrict src, size_t size);
void Test19(void)
{
static char b[40];
static char buf[20];
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}} \\
// expected-note {{change size argument to be the size of the destination}}
__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}} \
// expected-note {{change size argument to be the size of the destination}} \
// expected-warning {{'strlcpy' will always overflow; destination buffer has size 20, but size argument is 40}}
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}} \
// expected-note {{change size argument to be the size of the destination}}
__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}} \
// expected-note {{change size argument to be the size of the destination}} \
// expected-warning {{'strlcat' will always overflow; destination buffer has size 20, but size argument is 40}}
}
char * Test20(char *p, const char *in, unsigned n)
{
static char buf[10];
__builtin___memcpy_chk (&buf[6], in, 5, __builtin_object_size (&buf[6], 0)); // expected-warning {{'memcpy' will always overflow; destination buffer has size 4, but size argument is 5}}
__builtin___memcpy_chk (p, "abcde", n, __builtin_object_size (p, 0));
__builtin___memcpy_chk (&buf[5], "abcde", 5, __builtin_object_size (&buf[5], 0));
__builtin___memcpy_chk (&buf[5], "abcde", n, __builtin_object_size (&buf[5], 0));
__builtin___memcpy_chk (&buf[6], "abcde", 5, __builtin_object_size (&buf[6], 0)); // expected-warning {{'memcpy' will always overflow; destination buffer has size 4, but size argument is 5}}
return buf;
}
typedef void (fn_t)(int);
void test_builtin_launder(char *p, void *vp, const void *cvp,
const volatile int *ip, float *restrict fp,
fn_t *fn) {
__builtin_launder(); // expected-error {{too few arguments to function call, expected 1, have 0}}
__builtin_launder(p, p); // expected-error {{too many arguments to function call, expected 1, have 2}}
int x;
__builtin_launder(x); // expected-error {{non-pointer argument to '__builtin_launder' is not allowed}}
char *d = __builtin_launder(p);
__builtin_launder(vp); // expected-error {{void pointer argument to '__builtin_launder' is not allowed}}
__builtin_launder(cvp); // expected-error {{void pointer argument to '__builtin_launder' is not allowed}}
const volatile int *id = __builtin_launder(ip);
int *id2 = __builtin_launder(ip); // expected-warning {{discards qualifiers}}
float *fd = __builtin_launder(fp);
__builtin_launder(fn); // expected-error {{function pointer argument to '__builtin_launder' is not allowed}}
}
void test21(const int *ptr) {
__sync_fetch_and_add(ptr, 1); // expected-error{{address argument to atomic builtin cannot be const-qualified ('const int *' invalid)}}
__atomic_fetch_add(ptr, 1, 0); // expected-error {{address argument to atomic operation must be a pointer to non-const type ('const int *' invalid)}}
}
void test_ei_i42i(_BitInt(42) *ptr, int value) {
__sync_fetch_and_add(ptr, value); // expected-error {{atomic memory operand must have a power-of-two size}}
// expected-warning@+1 {{the semantics of this intrinsic changed with GCC version 4.4 - the newer semantics are provided here}}
__sync_nand_and_fetch(ptr, value); // expected-error {{atomic memory operand must have a power-of-two size}}
__atomic_fetch_add(ptr, 1, 0); // expected-error {{argument to atomic builtin of type '_BitInt' is not supported}}
}
void test_ei_i64i(_BitInt(64) *ptr, int value) {
__sync_fetch_and_add(ptr, value); // expect success
// expected-warning@+1 {{the semantics of this intrinsic changed with GCC version 4.4 - the newer semantics are provided here}}
__sync_nand_and_fetch(ptr, value); // expect success
__atomic_fetch_add(ptr, 1, 0); // expected-error {{argument to atomic builtin of type '_BitInt' is not supported}}
}
void test_ei_ii42(int *ptr, _BitInt(42) value) {
__sync_fetch_and_add(ptr, value); // expect success
// expected-warning@+1 {{the semantics of this intrinsic changed with GCC version 4.4 - the newer semantics are provided here}}
__sync_nand_and_fetch(ptr, value); // expect success
}
void test_ei_ii64(int *ptr, _BitInt(64) value) {
__sync_fetch_and_add(ptr, value); // expect success
// expected-warning@+1 {{the semantics of this intrinsic changed with GCC version 4.4 - the newer semantics are provided here}}
__sync_nand_and_fetch(ptr, value); // expect success
}
void test_ei_i42i42(_BitInt(42) *ptr, _BitInt(42) value) {
__sync_fetch_and_add(ptr, value); // expected-error {{atomic memory operand must have a power-of-two size}}
// expected-warning@+1 {{the semantics of this intrinsic changed with GCC version 4.4 - the newer semantics are provided here}}
__sync_nand_and_fetch(ptr, value); // expected-error {{atomic memory operand must have a power-of-two size}}
}
void test_ei_i64i64(_BitInt(64) *ptr, _BitInt(64) value) {
__sync_fetch_and_add(ptr, value); // expect success
// expected-warning@+1 {{the semantics of this intrinsic changed with GCC version 4.4 - the newer semantics are provided here}}
__sync_nand_and_fetch(ptr, value); // expect success
}
void test22(void) {
(void)__builtin_signbit(); // expected-error{{too few arguments to function call, expected 1, have 0}}
(void)__builtin_signbit(1.0, 2.0, 3.0); // expected-error{{too many arguments to function call, expected 1, have 3}}
(void)__builtin_signbit(1); // expected-error {{floating point classification requires argument of floating point type (passed in 'int')}}
(void)__builtin_signbit(1.0);
(void)__builtin_signbit(1.0f);
(void)__builtin_signbit(1.0L);
(void)__builtin_signbitf(); // expected-error{{too few arguments to function call, expected 1, have 0}}
(void)__builtin_signbitf(1.0, 2.0, 3.0); // expected-error{{too many arguments to function call, expected 1, have 3}}
(void)__builtin_signbitf(1);
(void)__builtin_signbitf(1.0);
(void)__builtin_signbitf(1.0f);
(void)__builtin_signbitf(1.0L);
(void)__builtin_signbitl(); // expected-error{{too few arguments to function call, expected 1, have 0}}
(void)__builtin_signbitl(1.0, 2.0, 3.0); // expected-error{{too many arguments to function call, expected 1, have 3}}
(void)__builtin_signbitl(1);
(void)__builtin_signbitl(1.0);
(void)__builtin_signbitl(1.0f);
(void)__builtin_signbitl(1.0L);
}
#define memcpy(x,y,z) __builtin___memcpy_chk(x,y,z, __builtin_object_size(x,0))
#define my_memcpy(x,y,z) __builtin___memcpy_chk(x,y,z, __builtin_object_size(x,0))
void test23(void) {
char src[1024];
char buf[10];
memcpy(buf, src, 11); // expected-warning{{'memcpy' will always overflow; destination buffer has size 10, but size argument is 11}}
my_memcpy(buf, src, 11); // expected-warning{{'memcpy' will always overflow; destination buffer has size 10, but size argument is 11}}
}
// Test that __builtin_is_constant_evaluated() is not allowed in C
int test_cxx_builtin(void) {
// expected-error@+1 {{use of unknown builtin '__builtin_is_constant_evaluated'}}
return __builtin_is_constant_evaluated();
}
void test_builtin_complex(void) {
__builtin_complex(); // expected-error {{too few}}
__builtin_complex(1); // expected-error {{too few}}
__builtin_complex(1, 2, 3); // expected-error {{too many}}
_Static_assert(_Generic(__builtin_complex(1.0f, 2.0f), _Complex float: 1, default: 0), "");
_Static_assert(_Generic(__builtin_complex(1.0, 2.0), _Complex double: 1, default: 0), "");
_Static_assert(_Generic(__builtin_complex(1.0l, 2.0l), _Complex long double: 1, default: 0), "");
__builtin_complex(1, 2); // expected-error {{argument type 'int' is not a real floating point type}}
__builtin_complex(1, 2.0); // expected-error {{argument type 'int' is not a real floating point type}}
__builtin_complex(1.0, 2); // expected-error {{argument type 'int' is not a real floating point type}}
__builtin_complex(1.0, 2.0f); // expected-error {{arguments are of different types ('double' vs 'float')}}
__builtin_complex(1.0f, 2.0); // expected-error {{arguments are of different types ('float' vs 'double')}}
}
_Complex double builtin_complex_static_init = __builtin_complex(1.0, 2.0);
int test_is_fpclass(float x, int mask) {
int x1 = __builtin_isfpclass(x, 1024); // expected-error {{argument value 1024 is outside the valid range [0, 1023]}}
int x2 = __builtin_isfpclass(3, 3); // expected-error{{floating point classification requires argument of floating point type (passed in 'int')}}
int x3 = __builtin_isfpclass(x, 3, x); // expected-error{{too many arguments to function call, expected 2, have 3}}
int x4 = __builtin_isfpclass(x); // expected-error{{too few arguments to function call, expected 2, have 1}}
int x5 = __builtin_isfpclass(x, mask); // expected-error{{argument to '__builtin_isfpclass' must be a constant integer}}
int x6 = __builtin_isfpclass(x, -1); // expected-error{{argument value -1 is outside the valid range [0, 1023]}}
float _Complex c = x;
int x7 = __builtin_isfpclass(c, 3); // expected-error{{floating point classification requires argument of floating point type (passed in '_Complex float')}}
}
Codebase Browser
llvm