249 lines
9.3 KiB
C
249 lines
9.3 KiB
C
// RUN: %clang_cc1 %s -verify -pedantic -fsyntax-only
|
|
|
|
// PR 8876 - don't warn about trivially unreachable null derefs. Note that
|
|
// we put this here because the reachability analysis only kicks in for
|
|
// suppressing false positives when code has no errors.
|
|
#define PR8876(err_ptr) do {\
|
|
if (err_ptr) *(int*)(err_ptr) = 1;\
|
|
} while (0)
|
|
|
|
#define PR8876_pos(err_ptr) do {\
|
|
if (!err_ptr) *(int*)(err_ptr) = 1;\
|
|
} while (0)
|
|
|
|
|
|
// Test that we don't report divide-by-zero errors in unreachable code.
|
|
// This test should be left as is, as it also tests CFG functionality.
|
|
void radar9171946() {
|
|
if (0) {
|
|
0 / (0 ? 1 : 0); // expected-warning {{expression result unused}}
|
|
}
|
|
}
|
|
|
|
int test_pr8876() {
|
|
PR8876(0); // no-warning
|
|
PR8876_pos(0); // expected-warning{{indirection of non-volatile null pointer will be deleted, not trap}} expected-note{{consider using __builtin_trap() or qualifying pointer with 'volatile'}}
|
|
return 0;
|
|
}
|
|
|
|
// PR 8183 - Handle null pointer constants on the left-side of the '&&', and reason about
|
|
// this when determining the reachability of the null pointer dereference on the right side.
|
|
void pr8183(unsigned long long test)
|
|
{
|
|
(void)((((void*)0)) && (*((unsigned long long*)(((void*)0))) = ((unsigned long long)((test)) % (unsigned long long)((1000000000))))); // no-warning
|
|
(*((unsigned long long*)(((void*)0))) = ((unsigned long long)((test)) % (unsigned long long)((1000000000)))); // expected-warning {{indirection of non-volatile null pointer will be deleted, not trap}} expected-note {{consider using __builtin_trap() or qualifying pointer with 'volatile'}}
|
|
}
|
|
|
|
// PR1966
|
|
_Complex double test1() {
|
|
return __extension__ 1.0if;
|
|
}
|
|
|
|
_Complex double test2() {
|
|
return 1.0if; // expected-warning {{imaginary constants are a GNU extension}}
|
|
}
|
|
|
|
// rdar://6097308
|
|
void test3() {
|
|
int x;
|
|
(__extension__ x) = 10;
|
|
}
|
|
|
|
// rdar://6162726
|
|
void test4() {
|
|
static int var;
|
|
var =+ 5; // expected-warning {{use of unary operator that may be intended as compound assignment (+=)}}
|
|
var =- 5; // expected-warning {{use of unary operator that may be intended as compound assignment (-=)}}
|
|
var = +5; // no warning when space between the = and +.
|
|
var = -5;
|
|
|
|
var =+5; // no warning when the subexpr of the unary op has no space before it.
|
|
var =-5;
|
|
|
|
#define FIVE 5
|
|
var=-FIVE; // no warning with macros.
|
|
var=-FIVE;
|
|
}
|
|
|
|
// rdar://6319320
|
|
void test5(int *X, float *P) {
|
|
(float*)X = P; // expected-error {{assignment to cast is illegal, lvalue casts are not supported}}
|
|
#define FOO ((float*) X)
|
|
FOO = P; // expected-error {{assignment to cast is illegal, lvalue casts are not supported}}
|
|
}
|
|
|
|
void test6() {
|
|
int X;
|
|
X(); // expected-error {{called object type 'int' is not a function or function pointer}}
|
|
}
|
|
|
|
void test7(int *P, _Complex float Gamma) {
|
|
P = (P-42) + Gamma*4; // expected-error {{invalid operands to binary expression ('int *' and '_Complex float')}}
|
|
}
|
|
|
|
|
|
// rdar://6095061
|
|
int test8(void) {
|
|
int i;
|
|
__builtin_choose_expr (0, 42, i) = 10;
|
|
return i;
|
|
}
|
|
|
|
|
|
// PR3386
|
|
struct f { int x : 4; float y[]; };
|
|
int test9(struct f *P) {
|
|
int R;
|
|
R = __alignof(P->x); // expected-error {{invalid application of 'alignof' to bit-field}}
|
|
R = __alignof(P->y); // ok.
|
|
R = sizeof(P->x); // expected-error {{invalid application of 'sizeof' to bit-field}}
|
|
return R;
|
|
}
|
|
|
|
// PR3562
|
|
void test10(int n,...) {
|
|
struct S {
|
|
double a[n]; // expected-error {{fields must have a constant size}}
|
|
} s;
|
|
double x = s.a[0]; // should not get another error here.
|
|
}
|
|
|
|
|
|
#define MYMAX(A,B) __extension__ ({ __typeof__(A) __a = (A); __typeof__(B) __b = (B); __a < __b ? __b : __a; })
|
|
|
|
struct mystruct {int A; };
|
|
void test11(struct mystruct P, float F) {
|
|
MYMAX(P, F); // expected-error {{invalid operands to binary expression ('typeof (P)' (aka 'struct mystruct') and 'typeof (F)' (aka 'float'))}}
|
|
}
|
|
|
|
// PR3753
|
|
int test12(const char *X) {
|
|
return X == "foo"; // expected-warning {{comparison against a string literal is unspecified (use strncmp instead)}}
|
|
}
|
|
|
|
int test12b(const char *X) {
|
|
return sizeof(X == "foo"); // no-warning
|
|
}
|
|
|
|
// rdar://6719156
|
|
void test13(
|
|
void (^P)()) { // expected-error {{blocks support disabled - compile with -fblocks}}
|
|
P();
|
|
P = ^(){}; // expected-error {{blocks support disabled - compile with -fblocks}}
|
|
}
|
|
|
|
void test14() {
|
|
typedef long long __m64 __attribute__((__vector_size__(8)));
|
|
typedef short __v4hi __attribute__((__vector_size__(8)));
|
|
|
|
// Ok.
|
|
__v4hi a;
|
|
__m64 mask = (__m64)((__v4hi)a > (__v4hi)a);
|
|
}
|
|
|
|
|
|
// PR5242
|
|
typedef unsigned long *test15_t;
|
|
|
|
test15_t test15(void) {
|
|
return (test15_t)0 + (test15_t)0; // expected-error {{invalid operands to binary expression ('test15_t' (aka 'unsigned long *') and 'test15_t')}}
|
|
}
|
|
|
|
// rdar://7446395
|
|
void test16(float x) { x == ((void*) 0); } // expected-error {{invalid operands to binary expression}}
|
|
|
|
// PR6004
|
|
void test17(int x) {
|
|
x = x / 0; // expected-warning {{division by zero is undefined}}
|
|
x = x % 0; // expected-warning {{remainder by zero is undefined}}
|
|
x /= 0; // expected-warning {{division by zero is undefined}}
|
|
x %= 0; // expected-warning {{remainder by zero is undefined}}
|
|
|
|
x = sizeof(x/0); // no warning.
|
|
}
|
|
|
|
// PR6501 & PR11857
|
|
void test18_a(int a); // expected-note 2 {{'test18_a' declared here}}
|
|
void test18_b(int); // expected-note {{'test18_b' declared here}}
|
|
void test18_c(int a, int b); // expected-note 2 {{'test18_c' declared here}}
|
|
void test18_d(int a, ...); // expected-note {{'test18_d' declared here}}
|
|
void test18_e(int a, int b, ...); // expected-note {{'test18_e' declared here}}
|
|
void test18(int b) {
|
|
test18_a(b, b); // expected-error {{too many arguments to function call, expected single argument 'a', have 2}}
|
|
test18_a(); // expected-error {{too few arguments to function call, single argument 'a' was not specified}}
|
|
test18_b(); // expected-error {{too few arguments to function call, expected 1, have 0}}
|
|
test18_c(b); // expected-error {{too few arguments to function call, expected 2, have 1}}
|
|
test18_c(b, b, b); // expected-error {{too many arguments to function call, expected 2, have 3}}
|
|
test18_d(); // expected-error {{too few arguments to function call, at least argument 'a' must be specified}}
|
|
test18_e(); // expected-error {{too few arguments to function call, expected at least 2, have 0}}
|
|
}
|
|
|
|
// PR7569
|
|
void test19() {
|
|
*(int*)0 = 0; // expected-warning {{indirection of non-volatile null pointer}} \
|
|
// expected-note {{consider using __builtin_trap}}
|
|
*(volatile int*)0 = 0; // Ok.
|
|
|
|
// rdar://9269271
|
|
int x = *(int*)0; // expected-warning {{indirection of non-volatile null pointer}} \
|
|
// expected-note {{consider using __builtin_trap}}
|
|
int x2 = *(volatile int*)0; // Ok.
|
|
int *p = &(*(int*)0); // Ok;
|
|
}
|
|
|
|
int test20(int x) {
|
|
return x && 4; // expected-warning {{use of logical '&&' with constant operand}} \
|
|
// expected-note {{use '&' for a bitwise operation}} \
|
|
// expected-note {{remove constant to silence this warning}}
|
|
|
|
return x && sizeof(int) == 4; // no warning, RHS is logical op.
|
|
|
|
// no warning, this is an idiom for "true" in old C style.
|
|
return x && (signed char)1;
|
|
|
|
return x || 0;
|
|
return x || 1;
|
|
return x || -1; // expected-warning {{use of logical '||' with constant operand}} \
|
|
// expected-note {{use '|' for a bitwise operation}}
|
|
return x || 5; // expected-warning {{use of logical '||' with constant operand}} \
|
|
// expected-note {{use '|' for a bitwise operation}}
|
|
return x && 0;
|
|
return x && 1;
|
|
return x && -1; // expected-warning {{use of logical '&&' with constant operand}} \
|
|
// expected-note {{use '&' for a bitwise operation}} \
|
|
// expected-note {{remove constant to silence this warning}}
|
|
return x && 5; // expected-warning {{use of logical '&&' with constant operand}} \
|
|
// expected-note {{use '&' for a bitwise operation}} \
|
|
// expected-note {{remove constant to silence this warning}}
|
|
return x || (0);
|
|
return x || (1);
|
|
return x || (-1); // expected-warning {{use of logical '||' with constant operand}} \
|
|
// expected-note {{use '|' for a bitwise operation}}
|
|
return x || (5); // expected-warning {{use of logical '||' with constant operand}} \
|
|
// expected-note {{use '|' for a bitwise operation}}
|
|
return x && (0);
|
|
return x && (1);
|
|
return x && (-1); // expected-warning {{use of logical '&&' with constant operand}} \
|
|
// expected-note {{use '&' for a bitwise operation}} \
|
|
// expected-note {{remove constant to silence this warning}}
|
|
return x && (5); // expected-warning {{use of logical '&&' with constant operand}} \
|
|
// expected-note {{use '&' for a bitwise operation}} \
|
|
// expected-note {{remove constant to silence this warning}}
|
|
|
|
}
|
|
|
|
struct Test21; // expected-note 2 {{forward declaration}}
|
|
void test21(volatile struct Test21 *ptr) {
|
|
void test21_help(void);
|
|
(test21_help(), *ptr); // expected-error {{incomplete type 'struct Test21' where a complete type is required}}
|
|
(*ptr, test21_help()); // expected-error {{incomplete type 'struct Test21' where a complete type is required}}
|
|
}
|
|
|
|
// Make sure we do function/array decay.
|
|
void test22() {
|
|
if ("help")
|
|
(void) 0;
|
|
|
|
if (test22)
|
|
(void) 0;
|
|
}
|