1// RUN: %clang -x c -fsanitize=implicit-unsigned-integer-truncation %s -DV0 -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-V0,CHECK
2// RUN: %clang -x c -fsanitize=implicit-unsigned-integer-truncation %s -DV1 -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-V1,CHECK
3// RUN: %clang -x c -fsanitize=implicit-unsigned-integer-truncation %s -DV2 -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-V2,CHECK
4// RUN: %clang -x c -fsanitize=implicit-unsigned-integer-truncation %s -DV3 -o %t && %run %t 2>&1 | FileCheck %s
5// RUN: %clang -x c -fsanitize=implicit-unsigned-integer-truncation %s -DV4 -o %t && %run %t 2>&1 | FileCheck %s
6// RUN: %clang -x c -fsanitize=implicit-unsigned-integer-truncation %s -DV5 -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-V5,CHECK
7// RUN: %clang -x c -fsanitize=implicit-unsigned-integer-truncation %s -DV6 -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-V6,CHECK
8// RUN: %clang -x c -fsanitize=implicit-unsigned-integer-truncation %s -DV7 -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-V7,CHECK
9
10// RUN: %clangxx -x c++ -fsanitize=implicit-unsigned-integer-truncation %s -DV0 -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-V0,CHECK
11// RUN: %clangxx -x c++ -fsanitize=implicit-unsigned-integer-truncation %s -DV1 -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-V1,CHECK
12// RUN: %clangxx -x c++ -fsanitize=implicit-unsigned-integer-truncation %s -DV2 -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-V2,CHECK
13// RUN: %clangxx -x c++ -fsanitize=implicit-unsigned-integer-truncation %s -DV3 -o %t && %run %t 2>&1 | FileCheck %s
14// RUN: %clangxx -x c++ -fsanitize=implicit-unsigned-integer-truncation %s -DV4 -o %t && %run %t 2>&1 | FileCheck %s
15// RUN: %clangxx -x c++ -fsanitize=implicit-unsigned-integer-truncation %s -DV5 -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-V5,CHECK
16// RUN: %clangxx -x c++ -fsanitize=implicit-unsigned-integer-truncation %s -DV6 -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-V6,CHECK
17// RUN: %clangxx -x c++ -fsanitize=implicit-unsigned-integer-truncation %s -DV7 -o %t && %run %t 2>&1 | FileCheck %s --check-prefixes=CHECK-V7,CHECK
18
19#include <stdint.h>
20#include <stdio.h>
21
22// Test plan:
23// * Two types - int and char
24// * Two signs - signed and unsigned
25// * Square that - we have input and output types.
26// Thus, there are total of (2*2)^2 == 16 tests.
27// These are all the possible variations/combinations of casts.
28// However, not all of them should result in the check.
29// So here, we *only* check which should and which should not result in checks.
30
31uint32_t convert_unsigned_int_to_unsigned_int(uint32_t x) {
32#line 100
33 return x;
34}
35
36uint8_t convert_unsigned_char_to_unsigned_char(uint8_t x) {
37#line 200
38 return x;
39}
40
41int32_t convert_signed_int_to_signed_int(int32_t x) {
42#line 300
43 return x;
44}
45
46int8_t convert_signed_char_to_signed_char(int8_t x) {
47#line 400
48 return x;
49}
50
51uint8_t convert_unsigned_int_to_unsigned_char(uint32_t x) {
52#line 500
53 return x;
54}
55
56uint32_t convert_unsigned_char_to_unsigned_int(uint8_t x) {
57#line 600
58 return x;
59}
60
61int32_t convert_unsigned_char_to_signed_int(uint8_t x) {
62#line 700
63 return x;
64}
65
66int32_t convert_signed_char_to_signed_int(int8_t x) {
67#line 800
68 return x;
69}
70
71int32_t convert_unsigned_int_to_signed_int(uint32_t x) {
72#line 900
73 return x;
74}
75
76uint32_t convert_signed_int_to_unsigned_int(int32_t x) {
77#line 1000
78 return x;
79}
80
81uint8_t convert_signed_int_to_unsigned_char(int32_t x) {
82#line 1100
83 return x;
84}
85
86uint8_t convert_signed_char_to_unsigned_char(int8_t x) {
87#line 1200
88 return x;
89}
90
91int8_t convert_unsigned_char_to_signed_char(uint8_t x) {
92#line 1300
93 return x;
94}
95
96uint32_t convert_signed_char_to_unsigned_int(int8_t x) {
97#line 1400
98 return x;
99}
100
101int8_t convert_unsigned_int_to_signed_char(uint32_t x) {
102#line 1500
103 return x;
104}
105
106int8_t convert_signed_int_to_signed_char(int32_t x) {
107#line 1600
108 return x;
109}
110
111#line 1111 // !!!
112
113int main() {
114 fprintf(stderr, format: "TEST\n");
115 // CHECK-NOT: runtime error
116 // CHECK-LABEL: TEST
117
118 // No bits set.
119 convert_unsigned_int_to_unsigned_int(x: 0);
120 convert_unsigned_char_to_unsigned_char(x: 0);
121 convert_signed_int_to_signed_int(x: 0);
122 convert_signed_char_to_signed_char(x: 0);
123 convert_unsigned_int_to_unsigned_char(x: 0);
124 convert_unsigned_char_to_unsigned_int(x: 0);
125 convert_unsigned_char_to_signed_int(x: 0);
126 convert_signed_char_to_signed_int(x: 0);
127 convert_unsigned_int_to_signed_int(x: 0);
128 convert_signed_int_to_unsigned_int(x: 0);
129 convert_signed_int_to_unsigned_char(x: 0);
130 convert_signed_char_to_unsigned_char(x: 0);
131 convert_unsigned_char_to_signed_char(x: 0);
132 convert_signed_char_to_unsigned_int(x: 0);
133 convert_unsigned_int_to_signed_char(x: 0);
134 convert_signed_int_to_signed_char(x: 0);
135
136 // One lowest bit set.
137 convert_unsigned_int_to_unsigned_int(x: 1);
138 convert_unsigned_char_to_unsigned_char(x: 1);
139 convert_signed_int_to_signed_int(x: 1);
140 convert_signed_char_to_signed_char(x: 1);
141 convert_unsigned_int_to_unsigned_char(x: 1);
142 convert_unsigned_char_to_unsigned_int(x: 1);
143 convert_unsigned_char_to_signed_int(x: 1);
144 convert_signed_char_to_signed_int(x: 1);
145 convert_unsigned_int_to_signed_int(x: 1);
146 convert_signed_int_to_unsigned_int(x: 1);
147 convert_signed_int_to_unsigned_char(x: 1);
148 convert_signed_char_to_unsigned_char(x: 1);
149 convert_unsigned_char_to_signed_char(x: 1);
150 convert_signed_char_to_unsigned_int(x: 1);
151 convert_unsigned_int_to_signed_char(x: 1);
152 convert_signed_int_to_signed_char(x: 1);
153
154#if defined(V0)
155 // All source bits set.
156 convert_unsigned_int_to_unsigned_int((uint32_t)UINT32_MAX);
157 convert_unsigned_char_to_unsigned_char((uint8_t)UINT8_MAX);
158 convert_signed_int_to_signed_int((int32_t)(uint32_t)UINT32_MAX);
159 convert_signed_char_to_signed_char((int8_t)UINT8_MAX);
160 convert_unsigned_int_to_unsigned_char((uint32_t)UINT32_MAX);
161// CHECK-V0: {{.*}}unsigned-integer-truncation.c:500:10: runtime error: implicit conversion from type '{{.*}}' (aka 'unsigned int') of value 4294967295 (32-bit, unsigned) to type '{{.*}}' (aka 'unsigned char') changed the value to 255 (8-bit, unsigned
162 convert_unsigned_char_to_unsigned_int((uint8_t)UINT8_MAX);
163 convert_unsigned_char_to_signed_int((uint8_t)UINT8_MAX);
164 convert_signed_char_to_signed_int((int8_t)UINT8_MAX);
165 convert_unsigned_int_to_signed_int((uint32_t)UINT32_MAX);
166 convert_signed_int_to_unsigned_int((int32_t)(uint32_t)UINT32_MAX);
167 convert_signed_int_to_unsigned_char((int32_t)(uint32_t)UINT32_MAX);
168 convert_signed_char_to_unsigned_char((int8_t)UINT8_MAX);
169 convert_unsigned_char_to_signed_char((uint8_t)UINT8_MAX);
170 convert_signed_char_to_unsigned_int((int8_t)UINT8_MAX);
171 convert_unsigned_int_to_signed_char((uint32_t)UINT32_MAX);
172 convert_signed_int_to_signed_char((int32_t)(uint32_t)UINT32_MAX);
173#elif defined(V1)
174 // Source 'Sign' bit set.
175 convert_unsigned_int_to_unsigned_int((uint32_t)INT32_MIN);
176 convert_unsigned_char_to_unsigned_char((uint8_t)INT8_MIN);
177 convert_signed_int_to_signed_int((int32_t)(uint32_t)INT32_MIN);
178 convert_signed_char_to_signed_char((int8_t)INT8_MIN);
179 convert_unsigned_int_to_unsigned_char((uint32_t)INT32_MIN);
180// CHECK-V1: {{.*}}unsigned-integer-truncation.c:500:10: runtime error: implicit conversion from type '{{.*}}' (aka 'unsigned int') of value 2147483648 (32-bit, unsigned) to type '{{.*}}' (aka 'unsigned char') changed the value to 0 (8-bit, unsigned)
181 convert_unsigned_char_to_unsigned_int((uint8_t)INT8_MIN);
182 convert_unsigned_char_to_signed_int((uint8_t)INT8_MIN);
183 convert_signed_char_to_signed_int((int8_t)INT8_MIN);
184 convert_unsigned_int_to_signed_int((uint32_t)INT32_MIN);
185 convert_signed_int_to_unsigned_int((int32_t)(uint32_t)INT32_MIN);
186 convert_signed_int_to_unsigned_char((int32_t)(uint32_t)INT32_MIN);
187 convert_signed_char_to_unsigned_char((int8_t)INT8_MIN);
188 convert_unsigned_char_to_signed_char((uint8_t)INT8_MIN);
189 convert_signed_char_to_unsigned_int((int8_t)INT8_MIN);
190 convert_unsigned_int_to_signed_char((uint32_t)INT32_MIN);
191 convert_signed_int_to_signed_char((int32_t)(uint32_t)INT32_MIN);
192#elif defined(V2)
193 // All bits except the source 'Sign' bit are set.
194 convert_unsigned_int_to_unsigned_int((uint32_t)INT32_MAX);
195 convert_unsigned_char_to_unsigned_char((uint8_t)INT8_MAX);
196 convert_signed_int_to_signed_int((int32_t)(uint32_t)INT32_MAX);
197 convert_signed_char_to_signed_char((int8_t)INT8_MAX);
198 convert_unsigned_int_to_unsigned_char((uint32_t)INT32_MAX);
199// CHECK-V2: {{.*}}unsigned-integer-truncation.c:500:10: runtime error: implicit conversion from type '{{.*}}' (aka 'unsigned int') of value 2147483647 (32-bit, unsigned) to type '{{.*}}' (aka 'unsigned char') changed the value to 255 (8-bit, unsigned)
200 convert_unsigned_char_to_unsigned_int((uint8_t)INT8_MAX);
201 convert_unsigned_char_to_signed_int((uint8_t)INT8_MAX);
202 convert_signed_char_to_signed_int((int8_t)INT8_MAX);
203 convert_unsigned_int_to_signed_int((uint32_t)INT32_MAX);
204 convert_signed_int_to_unsigned_int((int32_t)(uint32_t)INT32_MAX);
205 convert_signed_int_to_unsigned_char((int32_t)(uint32_t)INT32_MAX);
206 convert_signed_char_to_unsigned_char((int8_t)INT8_MAX);
207 convert_unsigned_char_to_signed_char((uint8_t)INT8_MAX);
208 convert_signed_char_to_unsigned_int((int8_t)INT8_MAX);
209 convert_unsigned_int_to_signed_char((uint32_t)INT32_MAX);
210 convert_signed_int_to_signed_char((int32_t)(uint32_t)INT32_MAX);
211#elif defined(V3)
212 // All destination bits set.
213 convert_unsigned_int_to_unsigned_int((uint32_t)UINT8_MAX);
214 convert_unsigned_char_to_unsigned_char((uint8_t)UINT8_MAX);
215 convert_signed_int_to_signed_int((int32_t)(uint32_t)UINT8_MAX);
216 convert_signed_char_to_signed_char((int8_t)UINT8_MAX);
217 convert_unsigned_int_to_unsigned_char((uint32_t)UINT8_MAX);
218 convert_unsigned_char_to_unsigned_int((uint8_t)UINT8_MAX);
219 convert_unsigned_char_to_signed_int((uint8_t)UINT8_MAX);
220 convert_signed_char_to_signed_int((int8_t)UINT8_MAX);
221 convert_unsigned_int_to_signed_int((uint32_t)UINT8_MAX);
222 convert_signed_int_to_unsigned_int((int32_t)(uint32_t)UINT8_MAX);
223 convert_signed_int_to_unsigned_char((int32_t)(uint32_t)UINT8_MAX);
224 convert_signed_char_to_unsigned_char((int8_t)UINT8_MAX);
225 convert_unsigned_char_to_signed_char((uint8_t)UINT8_MAX);
226 convert_signed_char_to_unsigned_int((int8_t)UINT8_MAX);
227 convert_unsigned_int_to_signed_char((uint32_t)UINT8_MAX);
228 convert_signed_int_to_signed_char((int32_t)(uint32_t)UINT8_MAX);
229#elif defined(V4)
230 // Destination 'sign' bit set.
231 convert_unsigned_int_to_unsigned_int((uint32_t)(uint8_t)INT8_MIN);
232 convert_unsigned_char_to_unsigned_char((uint8_t)(uint8_t)INT8_MIN);
233 convert_signed_int_to_signed_int((int32_t)(uint32_t)(uint8_t)INT8_MIN);
234 convert_signed_char_to_signed_char((int8_t)(uint8_t)INT8_MIN);
235 convert_unsigned_int_to_unsigned_char((uint32_t)(uint8_t)INT8_MIN);
236 convert_unsigned_char_to_unsigned_int((uint8_t)(uint8_t)INT8_MIN);
237 convert_unsigned_char_to_signed_int((uint8_t)(uint8_t)INT8_MIN);
238 convert_signed_char_to_signed_int((int8_t)(uint8_t)INT8_MIN);
239 convert_unsigned_int_to_signed_int((uint32_t)(uint8_t)INT8_MIN);
240 convert_signed_int_to_unsigned_int((int32_t)(uint32_t)(uint8_t)INT8_MIN);
241 convert_signed_int_to_unsigned_char((int32_t)(uint32_t)(uint8_t)INT8_MIN);
242 convert_signed_char_to_unsigned_char((int8_t)(uint8_t)INT8_MIN);
243 convert_unsigned_char_to_signed_char((uint8_t)(uint8_t)INT8_MIN);
244 convert_signed_char_to_unsigned_int((int8_t)(uint8_t)INT8_MIN);
245 convert_unsigned_int_to_signed_char((uint32_t)(uint8_t)INT8_MIN);
246 convert_signed_int_to_signed_char((int32_t)(uint32_t)(uint8_t)INT8_MIN);
247#elif defined(V5)
248 // All bits except the destination 'sign' bit are set.
249 convert_unsigned_int_to_unsigned_int((~((uint32_t)(uint8_t)INT8_MIN)));
250 convert_unsigned_char_to_unsigned_char((uint8_t)(uint8_t)INT8_MIN);
251 convert_signed_int_to_signed_int((int32_t)(~((uint32_t)(uint8_t)INT8_MIN)));
252 convert_signed_char_to_signed_char((int8_t)(uint8_t)INT8_MIN);
253 convert_unsigned_int_to_unsigned_char((~((uint32_t)(uint8_t)INT8_MIN)));
254// CHECK-V5: {{.*}}unsigned-integer-truncation.c:500:10: runtime error: implicit conversion from type '{{.*}}' (aka 'unsigned int') of value 4294967167 (32-bit, unsigned) to type '{{.*}}' (aka 'unsigned char') changed the value to 127 (8-bit, unsigned)
255 convert_unsigned_char_to_unsigned_int((uint8_t)(uint8_t)INT8_MIN);
256 convert_unsigned_char_to_signed_int((uint8_t)(uint8_t)INT8_MIN);
257 convert_signed_char_to_signed_int((int8_t)(uint8_t)INT8_MIN);
258 convert_unsigned_int_to_signed_int((~((uint32_t)(uint8_t)INT8_MIN)));
259 convert_signed_int_to_unsigned_int((int32_t)(~((uint32_t)(uint8_t)INT8_MIN)));
260 convert_signed_int_to_unsigned_char((int32_t)(~((uint32_t)(uint8_t)INT8_MIN)));
261 convert_signed_char_to_unsigned_char((int8_t)(uint8_t)INT8_MIN);
262 convert_unsigned_char_to_signed_char((uint8_t)(uint8_t)INT8_MIN);
263 convert_signed_char_to_unsigned_int((int8_t)(uint8_t)INT8_MIN);
264 convert_unsigned_int_to_signed_char((~((uint32_t)(uint8_t)INT8_MIN)));
265 convert_signed_int_to_signed_char((int32_t)(~((uint32_t)(uint8_t)INT8_MIN)));
266#elif defined(V6)
267 // Only the source and destination sign bits are set.
268 convert_unsigned_int_to_unsigned_int((uint32_t)INT32_MIN);
269 convert_unsigned_char_to_unsigned_char((uint8_t)INT8_MIN);
270 convert_signed_int_to_signed_int((int32_t)INT32_MIN);
271 convert_signed_char_to_signed_char((int8_t)INT8_MIN);
272 convert_unsigned_int_to_unsigned_char(((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN));
273// CHECK-V6: {{.*}}unsigned-integer-truncation.c:500:10: runtime error: implicit conversion from type '{{.*}}' (aka 'unsigned int') of value 2147483776 (32-bit, unsigned) to type '{{.*}}' (aka 'unsigned char') changed the value to 128 (8-bit, unsigned)
274 convert_unsigned_char_to_unsigned_int((uint8_t)INT8_MIN);
275 convert_unsigned_char_to_signed_int((uint8_t)INT8_MIN);
276 convert_signed_char_to_signed_int((int8_t)INT8_MIN);
277 convert_unsigned_int_to_signed_int((uint32_t)INT32_MIN);
278 convert_signed_int_to_unsigned_int((uint32_t)INT32_MIN);
279 convert_signed_int_to_unsigned_char((int32_t)(((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN)));
280 convert_signed_char_to_unsigned_char((int8_t)INT8_MIN);
281 convert_unsigned_char_to_signed_char((uint8_t)INT8_MIN);
282 convert_signed_char_to_unsigned_int((int8_t)INT8_MIN);
283 convert_unsigned_int_to_signed_char((((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN)));
284 convert_signed_int_to_signed_char((int32_t)(((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN)));
285#elif defined(V7)
286 // All bits except the source and destination sign bits are set.
287 convert_unsigned_int_to_unsigned_int((uint32_t)INT32_MAX);
288 convert_unsigned_char_to_unsigned_char((uint8_t)INT8_MAX);
289 convert_signed_int_to_signed_int((int32_t)INT32_MAX);
290 convert_signed_char_to_signed_char((int8_t)INT8_MAX);
291 convert_unsigned_int_to_unsigned_char(~(((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN)));
292// CHECK-V7: {{.*}}unsigned-integer-truncation.c:500:10: runtime error: implicit conversion from type '{{.*}}' (aka 'unsigned int') of value 2147483519 (32-bit, unsigned) to type '{{.*}}' (aka 'unsigned char') changed the value to 127 (8-bit, unsigned)
293 convert_unsigned_char_to_unsigned_int((uint8_t)INT8_MAX);
294 convert_unsigned_char_to_signed_int((uint8_t)INT8_MAX);
295 convert_signed_char_to_signed_int((int8_t)INT8_MAX);
296 convert_unsigned_int_to_signed_int((uint32_t)INT32_MAX);
297 convert_signed_int_to_unsigned_int((uint32_t)INT32_MAX);
298 convert_signed_int_to_unsigned_char((int32_t)(~(((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN))));
299 convert_signed_char_to_unsigned_char((int8_t)INT8_MAX);
300 convert_unsigned_char_to_signed_char((uint8_t)INT8_MAX);
301 convert_signed_char_to_unsigned_int((int8_t)INT8_MAX);
302 convert_unsigned_int_to_signed_char(~(((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN)));
303 convert_signed_int_to_signed_char((int32_t)~(((uint32_t)INT32_MIN) | ((uint32_t)(uint8_t)INT8_MIN)));
304#else
305#error Some V* needs to be defined!
306#endif
307
308 return 0;
309}
310
311// CHECK-NOT: runtime error
312

source code of compiler-rt/test/ubsan/TestCases/ImplicitConversion/unsigned-integer-truncation.c