1 // RUN: %clang_cc1 -triple x86_64-apple-darwin -fsyntax-only -pedantic -verify -Wsign-compare %s -Wno-unreachable-code
3 int test(char *C) { // nothing here should warn.
4 return C != ((void*)0);
7 return C != 1; // expected-warning {{comparison between pointer and integer ('char *' and 'int')}}
10 int ints(long a, unsigned long b) {
13 enum EnumC {C = 0x10000};
16 (a == (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
17 (a == (unsigned int) b) +
18 (a == (unsigned short) b) +
19 (a == (unsigned char) b) +
20 ((long) a == b) + // expected-warning {{comparison of integers of different signs}}
21 ((int) a == b) + // expected-warning {{comparison of integers of different signs}}
22 ((short) a == b) + // expected-warning {{comparison of integers of different signs}}
23 ((signed char) a == b) + // expected-warning {{comparison of integers of different signs}}
24 ((long) a == (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
25 ((int) a == (unsigned int) b) + // expected-warning {{comparison of integers of different signs}}
26 ((short) a == (unsigned short) b) + // expected-warning {{comparison of integers of different signs}}
27 ((signed char) a == (unsigned char) b) + // expected-warning {{comparison of integers of different signs}}
28 (a < (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
29 (a < (unsigned int) b) +
30 (a < (unsigned short) b) +
31 (a < (unsigned char) b) +
32 ((long) a < b) + // expected-warning {{comparison of integers of different signs}}
33 ((int) a < b) + // expected-warning {{comparison of integers of different signs}}
34 ((short) a < b) + // expected-warning {{comparison of integers of different signs}}
35 ((signed char) a < b) + // expected-warning {{comparison of integers of different signs}}
36 ((long) a < (unsigned long) b) + // expected-warning {{comparison of integers of different signs}}
37 ((int) a < (unsigned int) b) + // expected-warning {{comparison of integers of different signs}}
38 ((short) a < (unsigned short) b) + // expected-warning {{comparison of integers of different signs}}
39 ((signed char) a < (unsigned char) b) + // expected-warning {{comparison of integers of different signs}}
42 (A == (unsigned long) b) +
43 (A == (unsigned int) b) +
44 (A == (unsigned short) b) +
45 (A == (unsigned char) b) +
49 ((signed char) A == b) +
50 ((long) A == (unsigned long) b) +
51 ((int) A == (unsigned int) b) +
52 ((short) A == (unsigned short) b) +
53 ((signed char) A == (unsigned char) b) +
54 (A < (unsigned long) b) +
55 (A < (unsigned int) b) +
56 (A < (unsigned short) b) +
57 (A < (unsigned char) b) +
61 ((signed char) A < b) +
62 ((long) A < (unsigned long) b) +
63 ((int) A < (unsigned int) b) +
64 ((short) A < (unsigned short) b) +
65 ((signed char) A < (unsigned char) b) +
68 (a == (unsigned long) B) +
69 (a == (unsigned int) B) +
70 (a == (unsigned short) B) +
71 (a == (unsigned char) B) +
75 ((signed char) a == B) +
76 ((long) a == (unsigned long) B) +
77 ((int) a == (unsigned int) B) +
78 ((short) a == (unsigned short) B) +
79 ((signed char) a == (unsigned char) B) +
80 (a < (unsigned long) B) + // expected-warning {{comparison of integers of different signs}}
81 (a < (unsigned int) B) +
82 (a < (unsigned short) B) +
83 (a < (unsigned char) B) +
87 ((signed char) a < B) +
88 ((long) a < (unsigned long) B) + // expected-warning {{comparison of integers of different signs}}
89 ((int) a < (unsigned int) B) + // expected-warning {{comparison of integers of different signs}}
90 ((short) a < (unsigned short) B) + // expected-warning {{comparison of integers of different signs}}
91 ((signed char) a < (unsigned char) B) + // expected-warning {{comparison of integers of different signs}}
94 (C == (unsigned long) b) +
95 (C == (unsigned int) b) +
96 (C == (unsigned short) b) +
97 (C == (unsigned char) b) +
101 ((signed char) C == b) +
102 ((long) C == (unsigned long) b) +
103 ((int) C == (unsigned int) b) +
104 ((short) C == (unsigned short) b) +
105 ((signed char) C == (unsigned char) b) +
106 (C < (unsigned long) b) +
107 (C < (unsigned int) b) +
108 (C < (unsigned short) b) +
109 (C < (unsigned char) b) +
113 ((signed char) C < b) +
114 ((long) C < (unsigned long) b) +
115 ((int) C < (unsigned int) b) +
116 ((short) C < (unsigned short) b) +
117 ((signed char) C < (unsigned char) b) +
120 (a == (unsigned long) C) +
121 (a == (unsigned int) C) +
122 (a == (unsigned short) C) +
123 (a == (unsigned char) C) +
127 ((signed char) a == C) +
128 ((long) a == (unsigned long) C) +
129 ((int) a == (unsigned int) C) +
130 ((short) a == (unsigned short) C) +
131 ((signed char) a == (unsigned char) C) +
132 (a < (unsigned long) C) + // expected-warning {{comparison of integers of different signs}}
133 (a < (unsigned int) C) +
134 (a < (unsigned short) C) +
135 (a < (unsigned char) C) +
139 ((signed char) a < C) +
140 ((long) a < (unsigned long) C) + // expected-warning {{comparison of integers of different signs}}
141 ((int) a < (unsigned int) C) + // expected-warning {{comparison of integers of different signs}}
142 ((short) a < (unsigned short) C) + // expected-warning {{comparison of integers of different signs}}
143 ((signed char) a < (unsigned char) C) + // expected-warning {{comparison of integers of different signs}}
146 (0x80000 == (unsigned long) b) +
147 (0x80000 == (unsigned int) b) +
148 (0x80000 == (unsigned short) b) +
149 (0x80000 == (unsigned char) b) +
150 ((long) 0x80000 == b) +
151 ((int) 0x80000 == b) +
152 ((short) 0x80000 == b) +
153 ((signed char) 0x80000 == b) +
154 ((long) 0x80000 == (unsigned long) b) +
155 ((int) 0x80000 == (unsigned int) b) +
156 ((short) 0x80000 == (unsigned short) b) +
157 ((signed char) 0x80000 == (unsigned char) b) +
158 (0x80000 < (unsigned long) b) +
159 (0x80000 < (unsigned int) b) +
160 (0x80000 < (unsigned short) b) +
161 (0x80000 < (unsigned char) b) +
162 ((long) 0x80000 < b) +
163 ((int) 0x80000 < b) +
164 ((short) 0x80000 < b) +
165 ((signed char) 0x80000 < b) +
166 ((long) 0x80000 < (unsigned long) b) +
167 ((int) 0x80000 < (unsigned int) b) +
168 ((short) 0x80000 < (unsigned short) b) +
169 ((signed char) 0x80000 < (unsigned char) b) +
172 (a == (unsigned long) 0x80000) +
173 (a == (unsigned int) 0x80000) +
174 (a == (unsigned short) 0x80000) +
175 (a == (unsigned char) 0x80000) +
176 ((long) a == 0x80000) +
177 ((int) a == 0x80000) +
178 ((short) a == 0x80000) +
179 ((signed char) a == 0x80000) +
180 ((long) a == (unsigned long) 0x80000) +
181 ((int) a == (unsigned int) 0x80000) +
182 ((short) a == (unsigned short) 0x80000) +
183 ((signed char) a == (unsigned char) 0x80000) +
184 (a < (unsigned long) 0x80000) + // expected-warning {{comparison of integers of different signs}}
185 (a < (unsigned int) 0x80000) +
186 (a < (unsigned short) 0x80000) +
187 (a < (unsigned char) 0x80000) +
188 ((long) a < 0x80000) +
189 ((int) a < 0x80000) +
190 ((short) a < 0x80000) +
191 ((signed char) a < 0x80000) +
192 ((long) a < (unsigned long) 0x80000) + // expected-warning {{comparison of integers of different signs}}
193 ((int) a < (unsigned int) 0x80000) + // expected-warning {{comparison of integers of different signs}}
194 ((short) a < (unsigned short) 0x80000) + // expected-warning {{comparison of integers of different signs}}
195 ((signed char) a < (unsigned char) 0x80000) + // expected-warning {{comparison of integers of different signs}}
197 // We should be able to avoid warning about this.
198 (b != (a < 4 ? 1 : 2)) +
204 int equal(char *a, const char *b) {
208 int arrays(char (*a)[5], char(*b)[10], char(*c)[5]) {
210 return a == b; // expected-warning {{comparison of distinct pointer types}}
213 int pointers(int *a) {
214 return a > 0; // expected-warning {{ordered comparison between pointer and zero ('int *' and 'int') is an extension}}
215 return a > 42; // expected-warning {{ordered comparison between pointer and integer ('int *' and 'int')}}
216 return a > (void *)0; // expected-warning {{comparison of distinct pointer types}}
219 int function_pointers(int (*a)(int), int (*b)(int), void (*c)(int)) {
220 return a > b; // expected-warning {{ordered comparison of function pointers}}
221 return function_pointers > function_pointers; // expected-warning {{ordered comparison of function pointers}}
222 return a > c; // expected-warning {{comparison of distinct pointer types}}
223 return a == (void *) 0;
224 return a == (void *) 1; // expected-warning {{equality comparison between function pointer and void pointer}}
227 int void_pointers(void* foo) {
228 return foo == (void*) 0;
229 return foo == (void*) 1;
241 unsigned long long u31 : 31;
242 unsigned long long u32 : 32;
243 unsigned long long u63 : 63;
244 unsigned long long u64 : 64;
247 if (x->u8 == i32) { // comparison in int32, exact
249 } else if (x->u31 == i32) { // comparison in int32, exact
251 } else if (x->u32 == i32) { // expected-warning {{comparison of integers of different signs}}
253 } else if (x->u63 == i32) { // comparison in uint64, exact because ==
255 } else if (x->u64 == i32) { // expected-warning {{comparison of integers of different signs}}
266 if ((x > y ? x : y) > z)
274 if (value < (unsigned long) &ptr4) // expected-warning {{comparison of integers of different signs}}
279 int test5(unsigned int x) {
280 return (x < 0) // expected-warning {{comparison of unsigned expression < 0 is always false}}
281 && (0 > x) // expected-warning {{comparison of 0 > unsigned expression is always false}}
282 && (x >= 0) // expected-warning {{comparison of unsigned expression >= 0 is always true}}
283 && (0 <= x); // expected-warning {{comparison of 0 <= unsigned expression is always true}}