mirror of
https://github.com/cc65/cc65.git
synced 2024-12-27 00:29:31 +00:00
29 lines
742 B
C
29 lines
742 B
C
|
/* Bug 1941 - Bitwise shift char types by 0 count results in out-of-range access */
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <stdint.h>
|
||
|
|
|
||
|
|
uint8_t foo = 42U; /* "Low byte" */
|
||
|
|
uint8_t goo = 1U; /* "High byte" - you need it to reproduce the issue */
|
||
|
|
int16_t bar = 256; /* ...or just do it with this */
|
||
|
|
|
||
|
|
_Static_assert (sizeof (foo >> 0) == sizeof (int), "Shift result should be int-promoted");
|
||
|
|
_Static_assert (sizeof ((int8_t)bar << 0) == sizeof (int), "Shift result should be int-promoted");
|
||
|
|
|
||
|
|
unsigned failures;
|
||
|
|
|
||
|
|
int main(void)
|
||
|
|
{
|
||
|
|
if (foo >> 0 != foo) {
|
||
|
|
++failures;
|
||
|
|
printf("foo failed\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
if ((int8_t)bar << 0 != (int8_t)bar) {
|
||
|
|
++failures;
|
||
|
|
printf("bar failed\n");
|
||
|
|
}
|
||
|
|
|
||
|
|
return failures;
|
||
|
|
}
|