1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/crc-22.c b/gcc/testsuite/gcc.dg/crc-22.c
new file mode 100644
index 0000000..153eb6b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/crc-22.c
@@ -0,0 +1,17 @@
+/* { dg-do compile } */
+/* { dg-options "-O2 -fdump-tree-crc" } */
+
+#include <stdint.h>
+
+uint8_t not_crc(uint8_t crc, uint8_t data) {
+    uint8_t i;
+    crc = crc ^ data;
+    for (i = 0; i < 8; i++) {
+        if (data & 0x01)
+            crc = (crc >> 1) ^ 0x8C;
+        else
+            crc >>= 1;
+    }
+    return crc;
+}
+/* { dg-final { scan-tree-dump-times "Attention! not_crc function calculates CRC." 0 "crc"} } */