mirror of
https://github.com/cc65/cc65.git
synced 2024-08-17 03:29:15 +00:00
61 lines
1.5 KiB
C
61 lines
1.5 KiB
C
/* #1675 - Some UB cases of bit-shifts */
|
|
|
|
#include <stdio.h>
|
|
|
|
int unexpected = 0;
|
|
|
|
void Test_UB(void)
|
|
{
|
|
{
|
|
/* UB per standard, lhs expected in cc65: (int)-32768 */
|
|
if (!((0x4000 << 1) < 0)) {
|
|
++unexpected;
|
|
printf("Expected: (0x4000 << 1) < 0, got lhs: %ld\n", (long)(0x4000 << 1));
|
|
}
|
|
}
|
|
|
|
{
|
|
/* UB per standard, lhs expected in cc65: (long)-2147483648L */
|
|
if (!((0x40000000 << 1) < 0)) {
|
|
++unexpected;
|
|
printf("Expected: (0x40000000 << 1) < 0, got lhs: %ld\n", (long)(0x40000000 << 1));
|
|
}
|
|
}
|
|
|
|
{
|
|
/* UB per standard, lhs expected in cc65: (int)-32768 */
|
|
if (!(((unsigned char)0x80 << 8) < 0)) {
|
|
++unexpected;
|
|
printf("Expected: ((unsigned char)0x80 << 8) < 0, got lhs: %ld\n", (long)((unsigned char)0x80 << 8));
|
|
}
|
|
}
|
|
|
|
{
|
|
/* UB per standard, lhs expected in cc65: (int)-32768 */
|
|
if (!(((short)0x4000L << 1) < 0)) {
|
|
++unexpected;
|
|
printf("Expected: ((short)0x4000L << 1) < 0, got lhs: %ld\n", (long)((short)0x4000L << 1));
|
|
}
|
|
}
|
|
|
|
{
|
|
const signed short x = 0x4000;
|
|
/* UB per standard, lhs expected in cc65: (int)-32768 */
|
|
if (!((x << 1) < 0)) {
|
|
++unexpected;
|
|
printf("Expected: (x << 1) < 0, got lhs: %ld\n", (long)(x << 1));
|
|
}
|
|
}
|
|
}
|
|
|
|
int main(void)
|
|
{
|
|
Test_UB();
|
|
|
|
if (unexpected != 0) {
|
|
printf("Unexpected: %d\n", unexpected);
|
|
}
|
|
|
|
return unexpected;
|
|
}
|