1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
/* { dg-do compile } */
/* { dg-options "-O2" } */
#include <stdbool.h>
bool my_uadd_overflow (unsigned char a, unsigned char b, unsigned char *res)
{
return __builtin_add_overflow (a, b, res);
}
bool my_usub_overflow (unsigned char a, unsigned char b, unsigned char *res)
{
return __builtin_sub_overflow (a, b, res);
}
bool my_uneg_overflow (unsigned char a, unsigned char *res)
{
return __builtin_sub_overflow (0, a, res);
}
bool my_add_overflow (signed char a, signed char b, signed char *res)
{
return __builtin_add_overflow (a, b, res);
}
bool my_sub_overflow (signed char a, signed char b, signed char *res)
{
return __builtin_sub_overflow (a, b, res);
}
bool my_neg_overflow (signed char a, signed char *res)
{
return __builtin_sub_overflow (0, a, res);
}
/* { dg-final { scan-assembler-times "add.b" 2 } } */
/* { dg-final { scan-assembler-times "sub.b" 4 } } */
/* { dg-final { scan-assembler-not "cmp.b" } } */
|
