323 lines
13 KiB
C
323 lines
13 KiB
C
// RUN: %clang_cc1 %s -fsyntax-only -verify -pedantic -Wstrlcpy-strlcat-size -Wno-string-plus-int -triple=i686-apple-darwin9
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// This test needs to set the target because it uses __builtin_ia32_vec_ext_v4si
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int test1(float a, int b) {
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return __builtin_isless(a, b); // expected-note {{declared here}}
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}
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int test2(int a, int b) {
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return __builtin_islessequal(a, b); // expected-error {{floating point type}}
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}
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int test3(double a, float b) {
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return __builtin_isless(a, b);
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}
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int test4(int* a, double b) {
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return __builtin_islessequal(a, b); // expected-error {{floating point type}}
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}
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int test5(float a, long double b) {
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return __builtin_isless(a, b, b); // expected-error {{too many arguments}}
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}
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int test6(float a, long double b) {
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return __builtin_islessequal(a); // expected-error {{too few arguments}}
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}
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#define CFSTR __builtin___CFStringMakeConstantString
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void test7() {
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const void *X;
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X = CFSTR("\242"); // expected-warning {{input conversion stopped}}
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X = CFSTR("\0"); // no-warning
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X = CFSTR(242); // expected-error {{CFString literal is not a string constant}} expected-warning {{incompatible integer to pointer conversion}}
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X = CFSTR("foo", "bar"); // expected-error {{too many arguments to function call}}
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}
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// atomics.
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void test9(short v) {
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unsigned i, old;
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old = __sync_fetch_and_add(); // expected-error {{too few arguments to function call}}
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old = __sync_fetch_and_add(&old); // expected-error {{too few arguments to function call}}
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old = __sync_fetch_and_add((unsigned*)0, 42i); // expected-warning {{imaginary constants are a GNU extension}}
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// PR7600: Pointers are implicitly casted to integers and back.
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void *old_ptr = __sync_val_compare_and_swap((void**)0, 0, 0);
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// Ensure the return type is correct even when implicit casts are stripped
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// away. This triggers an assertion while checking the comparison otherwise.
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if (__sync_fetch_and_add(&old, 1) == 1) {
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}
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}
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// overloaded atomics should be declared only once.
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void test9_1(volatile int* ptr, int val) {
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__sync_fetch_and_add_4(ptr, val);
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}
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void test9_2(volatile int* ptr, int val) {
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__sync_fetch_and_add(ptr, val);
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}
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void test9_3(volatile int* ptr, int val) {
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__sync_fetch_and_add_4(ptr, val);
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__sync_fetch_and_add(ptr, val);
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__sync_fetch_and_add(ptr, val);
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__sync_fetch_and_add_4(ptr, val);
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__sync_fetch_and_add_4(ptr, val);
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}
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void test9_4(volatile int* ptr, int val) {
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// expected-warning@+1 {{the semantics of this intrinsic changed with GCC version 4.4 - the newer semantics are provided here}}
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__sync_fetch_and_nand(ptr, val);
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}
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// rdar://7236819
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void test10(void) __attribute__((noreturn));
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void test10(void) {
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__asm__("int3");
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__builtin_unreachable();
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// No warning about falling off the end of a noreturn function.
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}
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void test11(int X) {
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switch (X) {
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case __builtin_eh_return_data_regno(0): // constant foldable.
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break;
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}
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__builtin_eh_return_data_regno(X); // expected-error {{argument to '__builtin_eh_return_data_regno' must be a constant integer}}
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}
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// PR5062
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void test12(void) __attribute__((__noreturn__));
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void test12(void) {
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__builtin_trap(); // no warning because trap is noreturn.
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}
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void test_unknown_builtin(int a, int b) {
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__builtin_isles(a, b); // expected-error{{use of unknown builtin}} \
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// expected-note{{did you mean '__builtin_isless'?}}
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}
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int test13() {
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__builtin_eh_return(0, 0); // no warning, eh_return never returns.
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}
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// <rdar://problem/8228293>
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void test14() {
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int old;
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old = __sync_fetch_and_min((volatile int *)&old, 1);
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}
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// <rdar://problem/8336581>
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void test15(const char *s) {
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__builtin_printf("string is %s\n", s);
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}
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// PR7885
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int test16() {
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return __builtin_constant_p() + // expected-error{{too few arguments}}
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__builtin_constant_p(1, 2); // expected-error {{too many arguments}}
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}
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// __builtin_constant_p cannot resolve non-constants as a file scoped array.
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int expr;
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char y[__builtin_constant_p(expr) ? -1 : 1]; // no warning, the builtin is false.
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// no warning, the builtin is false.
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struct foo { int a; };
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struct foo x = (struct foo) { __builtin_constant_p(42) ? 37 : 927 };
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const int test17_n = 0;
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const char test17_c[] = {1, 2, 3, 0};
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const char test17_d[] = {1, 2, 3, 4};
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typedef int __attribute__((vector_size(16))) IntVector;
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struct Aggregate { int n; char c; };
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enum Enum { EnumValue1, EnumValue2 };
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typedef __typeof(sizeof(int)) size_t;
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size_t strlen(const char *);
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void test17() {
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#define ASSERT(...) { int arr[(__VA_ARGS__) ? 1 : -1]; }
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#define T(...) ASSERT(__builtin_constant_p(__VA_ARGS__))
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#define F(...) ASSERT(!__builtin_constant_p(__VA_ARGS__))
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// __builtin_constant_p returns 1 if the argument folds to:
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// - an arithmetic constant with value which is known at compile time
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T(test17_n);
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T(&test17_c[3] - test17_c);
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T(3i + 5); // expected-warning {{imaginary constant}}
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T(4.2 * 7.6);
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T(EnumValue1);
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T((enum Enum)(int)EnumValue2);
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// - the address of the first character of a string literal, losslessly cast
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// to any type
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T("string literal");
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T((double*)"string literal");
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T("string literal" + 0);
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T((long)"string literal");
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// ... and otherwise returns 0.
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F("string literal" + 1);
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F(&test17_n);
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F(test17_c);
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F(&test17_c);
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F(&test17_d);
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F((struct Aggregate){0, 1});
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F((IntVector){0, 1, 2, 3});
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F(test17);
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// Ensure that a technique used in glibc is handled correctly.
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#define OPT(...) (__builtin_constant_p(__VA_ARGS__) && strlen(__VA_ARGS__) < 4)
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// FIXME: These are incorrectly treated as ICEs because strlen is treated as
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// a builtin.
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ASSERT(OPT("abc"));
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ASSERT(!OPT("abcd"));
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// In these cases, the strlen is non-constant, but the __builtin_constant_p
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// is 0: the array size is not an ICE but is foldable.
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ASSERT(!OPT(test17_c)); // expected-warning {{folded}}
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ASSERT(!OPT(&test17_c[0])); // expected-warning {{folded}}
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ASSERT(!OPT((char*)test17_c)); // expected-warning {{folded}}
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ASSERT(!OPT(test17_d)); // expected-warning {{folded}}
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ASSERT(!OPT(&test17_d[0])); // expected-warning {{folded}}
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ASSERT(!OPT((char*)test17_d)); // expected-warning {{folded}}
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#undef OPT
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#undef T
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#undef F
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}
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void test18() {
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char src[1024];
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char dst[2048];
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size_t result;
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void *ptr;
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ptr = __builtin___memccpy_chk(dst, src, '\037', sizeof(src), sizeof(dst));
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result = __builtin___strlcpy_chk(dst, src, sizeof(dst), sizeof(dst));
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result = __builtin___strlcat_chk(dst, src, sizeof(dst), sizeof(dst));
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ptr = __builtin___memccpy_chk(dst, src, '\037', sizeof(src)); // expected-error {{too few arguments to function call}}
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ptr = __builtin___strlcpy_chk(dst, src, sizeof(dst), sizeof(dst)); // expected-warning {{incompatible integer to pointer conversion}}
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ptr = __builtin___strlcat_chk(dst, src, sizeof(dst), sizeof(dst)); // expected-warning {{incompatible integer to pointer conversion}}
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}
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void no_ms_builtins() {
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__assume(1); // expected-warning {{implicit declaration}}
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__noop(1); // expected-warning {{implicit declaration}}
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__debugbreak(); // expected-warning {{implicit declaration}}
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}
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void unavailable() {
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__builtin_operator_new(0); // expected-error {{'__builtin_operator_new' is only available in C++}}
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__builtin_operator_delete(0); // expected-error {{'__builtin_operator_delete' is only available in C++}}
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}
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// rdar://18259539
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size_t strlcpy(char * restrict dst, const char * restrict src, size_t size);
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size_t strlcat(char * restrict dst, const char * restrict src, size_t size);
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void Test19(void)
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{
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static char b[40];
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static char buf[20];
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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}} \\
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// expected-note {{change size argument to be the size of the destination}}
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__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}} \
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// expected-note {{change size argument to be the size of the destination}} \
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// expected-warning {{'strlcpy' will always overflow; destination buffer has size 20, but size argument is 40}}
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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}} \
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// expected-note {{change size argument to be the size of the destination}}
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__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}} \
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// expected-note {{change size argument to be the size of the destination}} \
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// expected-warning {{'strlcat' will always overflow; destination buffer has size 20, but size argument is 40}}
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}
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// rdar://11076881
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char * Test20(char *p, const char *in, unsigned n)
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{
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static char buf[10];
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__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}}
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__builtin___memcpy_chk (p, "abcde", n, __builtin_object_size (p, 0));
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__builtin___memcpy_chk (&buf[5], "abcde", 5, __builtin_object_size (&buf[5], 0));
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__builtin___memcpy_chk (&buf[5], "abcde", n, __builtin_object_size (&buf[5], 0));
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__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}}
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return buf;
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}
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typedef void (fn_t)(int);
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void test_builtin_launder(char *p, void *vp, const void *cvp,
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const volatile int *ip, float *restrict fp,
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fn_t *fn) {
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__builtin_launder(); // expected-error {{too few arguments to function call, expected 1, have 0}}
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__builtin_launder(p, p); // expected-error {{too many arguments to function call, expected 1, have 2}}
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int x;
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__builtin_launder(x); // expected-error {{non-pointer argument to '__builtin_launder' is not allowed}}
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char *d = __builtin_launder(p);
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__builtin_launder(vp); // expected-error {{void pointer argument to '__builtin_launder' is not allowed}}
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__builtin_launder(cvp); // expected-error {{void pointer argument to '__builtin_launder' is not allowed}}
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const volatile int *id = __builtin_launder(ip);
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int *id2 = __builtin_launder(ip); // expected-warning {{discards qualifiers}}
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float *fd = __builtin_launder(fp);
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__builtin_launder(fn); // expected-error {{function pointer argument to '__builtin_launder' is not allowed}}
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}
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void test21(const int *ptr) {
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__sync_fetch_and_add(ptr, 1); // expected-error{{address argument to atomic builtin cannot be const-qualified ('const int *' invalid)}}
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__atomic_fetch_add(ptr, 1, 0); // expected-error {{address argument to atomic operation must be a pointer to non-const type ('const int *' invalid)}}
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}
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void test22(void) {
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(void)__builtin_signbit(); // expected-error{{too few arguments to function call, expected 1, have 0}}
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(void)__builtin_signbit(1.0, 2.0, 3.0); // expected-error{{too many arguments to function call, expected 1, have 3}}
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(void)__builtin_signbit(1); // expected-error {{floating point classification requires argument of floating point type (passed in 'int')}}
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(void)__builtin_signbit(1.0);
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(void)__builtin_signbit(1.0f);
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(void)__builtin_signbit(1.0L);
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(void)__builtin_signbitf(); // expected-error{{too few arguments to function call, expected 1, have 0}}
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(void)__builtin_signbitf(1.0, 2.0, 3.0); // expected-error{{too many arguments to function call, expected 1, have 3}}
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(void)__builtin_signbitf(1);
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(void)__builtin_signbitf(1.0);
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(void)__builtin_signbitf(1.0f);
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(void)__builtin_signbitf(1.0L);
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(void)__builtin_signbitl(); // expected-error{{too few arguments to function call, expected 1, have 0}}
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(void)__builtin_signbitl(1.0, 2.0, 3.0); // expected-error{{too many arguments to function call, expected 1, have 3}}
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(void)__builtin_signbitl(1);
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(void)__builtin_signbitl(1.0);
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(void)__builtin_signbitl(1.0f);
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(void)__builtin_signbitl(1.0L);
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}
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// rdar://43909200
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#define memcpy(x,y,z) __builtin___memcpy_chk(x,y,z, __builtin_object_size(x,0))
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#define my_memcpy(x,y,z) __builtin___memcpy_chk(x,y,z, __builtin_object_size(x,0))
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void test23() {
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char src[1024];
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char buf[10];
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memcpy(buf, src, 11); // expected-warning{{'memcpy' will always overflow; destination buffer has size 10, but size argument is 11}}
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my_memcpy(buf, src, 11); // expected-warning{{'memcpy' will always overflow; destination buffer has size 10, but size argument is 11}}
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}
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// Test that __builtin_is_constant_evaluated() is not allowed in C
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int test_cxx_builtin() {
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// expected-error@+1 {{use of unknown builtin '__builtin_is_constant_evaluated'}}
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return __builtin_is_constant_evaluated();
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}
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