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Merge pull request #2397 from colinleroy/bug-2395-test

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Add test case for issue #2395
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Bob Andrews 2024-02-01 23:09:12 +01:00 committed by GitHub
commit a7ac9b7ef2
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/* bug #2395: Bitwise operators with a boolean expression fail when optimized */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
unsigned char a, b;
unsigned char c = 199;
unsigned char d = 100;
int main(void) {
int fails = 0;
a = c ^ (d != 0);
b = c ^ 1;
printf("%u ^ (%u != 0) => %u\n", c, d, a);
if (a != b) {
printf("XOR error: a %d instead of %d\n", a, b);
fails++;
}
a = c | (d != 0);
b = c | 1;
printf("%u | (%u != 0) => %u\n", c, d, a);
if (a != b) {
printf("OR error: a %d instead of %d\n", a, b);
fails++;
}
a = c & (d != 0);
b = c & 1;
printf("%u & (%u != 0) => %u\n", c, d, a);
if (a != b) {
printf("AND error: a %d instead of %d\n", a, b);
fails++;
}
printf("%d errors\n", fails);
#ifdef __OPT__
return fails;
#else
/* Force exit failure on non-optimised version, which works,
* otherwise it breaks the build
*/
return 1;
#endif
}