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/* { dg-do compile } */
/* { dg-options "-O2 -fdump-tree-crc" } */
#include <stdint.h>
uint16_t crc_xmodem_update(uint16_t crc, uint8_t data) {
int i;
crc = crc ^ ((uint16_t) data << 8);
for (i = 0; i < 8; i++) {
if (crc & 0x8000)
crc = (crc << 1) ^ 0x1021;
else
crc <<= 1;
}
return crc;
}
/* { dg-final { scan-tree-dump "Attention! crc_xmodem_update function calculates CRC." "crc"} } */
/* { dg-final { scan-tree-dump "Return size is 16" "crc"} } */
/* { dg-final { scan-tree-dump "Loop iteration number is 7" "crc"} } */
/* { dg-final { scan-tree-dump "Bit forward" "crc"} } */
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