blob: 1eac3ae6049f624393ae68bd3c2e332619bc45c2 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
|
/* { dg-do compile } */
/* { dg-options "-fdump-tree-crc-details" } */
/* { dg-skip-if "" { *-*-* } { "-O0" "-O1" "-Os" "-flto" } } */
/* { dg-require-effective-target int32plus } */
#include <stdint.h>
uint32_t _crc32 (uint32_t data, uint32_t crc) {
int i;
for (i = 0; i < 24; i++) {
if ((crc & 0x80000000) >> 8 ^ (data & 0x800000))
crc = (crc << 1) ^ 0x04C11DB7;
else
crc = (crc << 1);
data <<= 1;
}
return crc;
}
/* { dg-final { scan-tree-dump "_crc32 function maybe contains CRC calculation." "crc" } } */
/* { dg-final { scan-tree-dump "Loop iteration number is 23" "crc" } } */
/* { dg-final { scan-tree-dump "Bit forward" "crc" } } */
|
