96 lines
3.7 KiB
C
96 lines
3.7 KiB
C
// RUN: %clang_cc1 -triple x86_64-apple-darwin -fsyntax-only -verify %s
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// rdar://18716393
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extern int a[] __attribute__((weak));
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int b[] = {8,13,21};
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struct {
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int x[10];
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} c;
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const char str[] = "text";
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void ignore(void) {
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if (!a) {}
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}
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void test(void) {
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if (!b) {} // expected-warning {{address of array 'b' will always evaluate to 'true'}}
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if (b == 0) {} // expected-warning {{comparison of array 'b' equal to a null pointer is always false}}
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if (!c.x) {} // expected-warning {{address of array 'c.x' will always evaluate to 'true'}}
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if (c.x == 0) {} // expected-warning {{comparison of array 'c.x' equal to a null pointer is always false}}
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if (!str) {} // expected-warning {{address of array 'str' will always evaluate to 'true'}}
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if (0 == str) {} // expected-warning {{comparison of array 'str' equal to a null pointer is always false}}
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}
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int array[2];
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int test1(void)
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{
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if (!array) { // expected-warning {{address of array 'array' will always evaluate to 'true'}}
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return array[0];
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} else if (array != 0) { // expected-warning {{comparison of array 'array' not equal to a null pointer is always true}}
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return array[1];
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}
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if (array == 0) // expected-warning {{comparison of array 'array' equal to a null pointer is always false}}
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return 1;
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return 0;
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}
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#define NULL (void*)0
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int test2(int* pointer, char ch, void * pv) {
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if (!&pointer) { // expected-warning {{address of 'pointer' will always evaluate to 'true'}}
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return 0;
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}
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if (&pointer) { // expected-warning {{address of 'pointer' will always evaluate to 'true'}}
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return 0;
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}
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if (&pointer == NULL) {} // expected-warning {{comparison of address of 'pointer' equal to a null pointer is always false}}
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if (&pointer != NULL) {} // expected-warning {{comparison of address of 'pointer' not equal to a null pointer is always true}}
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return 1;
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}
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void test3(void) {
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if (array) { } // expected-warning {{address of array 'array' will always evaluate to 'true'}}
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if (array != 0) {} // expected-warning {{comparison of array 'array' not equal to a null pointer is always true}}
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if (!array) { } // expected-warning {{address of array 'array' will always evaluate to 'true'}}
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if (array == 0) {} // expected-warning {{comparison of array 'array' equal to a null pointer is always false}}
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if (array[0] &&
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array) {} // expected-warning {{address of array 'array' will always evaluate to 'true'}}
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if (array[0] ||
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array) {} // expected-warning {{address of array 'array' will always evaluate to 'true'}}
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if (array[0] &&
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!array) {} // expected-warning {{address of array 'array' will always evaluate to 'true'}}
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if (array[0] ||
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!array) {} // expected-warning {{address of array 'array' will always evaluate to 'true'}}
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if (array && // expected-warning {{address of array 'array' will always evaluate to 'true'}}
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array[0]) {}
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if (!array || // expected-warning {{address of array 'array' will always evaluate to 'true'}}
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array[0]) {}
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if (array || // expected-warning {{address of array 'array' will always evaluate to 'true'}}
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(!array && array[0])) {} // expected-warning {{address of array 'array' will always evaluate to 'true'}}
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}
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// rdar://19256338
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#define SAVE_READ(PTR) if( (PTR) && (&result) ) *result=*PTR;
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void _HTTPClientErrorHandler(int me)
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{
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int *result;
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SAVE_READ(&me);
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}
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void test_conditional_operator(void) {
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int x;
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x = b ? 1 : 0; // expected-warning {{address of array}}
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x = c.x ? 1 : 0; // expected-warning {{address of array}}
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x = str ? 1 : 0; // expected-warning {{address of array}}
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x = array ? 1 : 0; // expected-warning {{address of array}}
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x = &x ? 1 : 0; // expected-warning {{address of 'x'}}
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}
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