| /* { dg-do compile } */ |
| /* { dg-options "-fdump-tree-crc-details -O2" } */ |
| |
| // File - reliable_text.c |
| #include <stdint.h> |
| char calculateCRC8_(char* input, int length) |
| { |
| unsigned char generator = 0x1D; |
| unsigned char crc = 0x00; |
| |
| while (length > 0) |
| { |
| unsigned char ch = *input++; |
| length--; |
| |
| |
| if (ch == 0) break; |
| |
| crc ^= ch; |
| |
| for (int i = 0; i < 8; i++) |
| { |
| if ((crc & 0x80) != 0) |
| { |
| crc = (unsigned char)((crc << 1) ^ generator); |
| } |
| else |
| { |
| crc <<= 1; |
| } |
| } |
| } |
| |
| return crc; |
| } |
| |
| /* { dg-final { scan-tree-dump "calculates CRC!" "crc" } } */ |
