blob: f93bcde1027a8fb4864f55fed467bc0f4feb1c7e (
plain)
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
39
40
41
42
43
44
|
/* { dg-do compile { target arm*-*-* alpha*-*-* i?86-*-* powerpc*-*-* rs6000-*-* x86_64-*-* s390*-*-* } } */
/* { dg-require-effective-target stdint_types } */
/* { dg-options "-O2 -fdump-rtl-combine" } */
/* { dg-additional-options "-march=z900" { target s390-*-* } } */
/* The test is similiar to builtin-bswap-6.c but returns 1/2 instead
of 0/1 to prevent GCC from calculating the return value with
arithmetic instead of a comparison. This requires the optimization
level to be bumped up to -O2 at least for x86_64. */
#include <stdint.h>
#define BS(X) __builtin_bswap32(X)
int foo1 (uint32_t a)
{
if (BS (a) == 0xA0000)
return 1;
return 2;
}
int foo2 (uint32_t a)
{
if (BS (a) != 0xA0000)
return 1;
return 2;
}
int foo3 (uint32_t a, uint32_t b)
{
if (BS (a) == BS (b))
return 1;
return 2;
}
int foo4 (uint32_t a, uint32_t b)
{
if (BS (a) != BS (b))
return 1;
return 2;
}
/* { dg-final { scan-rtl-dump-not "bswapsi" "combine" } } */
/* { dg-final { cleanup-rtl-dump "combine" } } */
|
