1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/graphite/pr42205-1.c b/gcc/testsuite/gcc.dg/graphite/pr42205-1.c
new file mode 100644
index 000000000..413b9f7ea
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/graphite/pr42205-1.c
@@ -0,0 +1,17 @@
+/* { dg-options "-O1 -ffast-math -floop-interchange" } */
+
+int adler32(int adler, char *buf, int n)
+{
+  int sum = 0;
+  do {
+     adler += buf[0];
+     sum += adler;
+     adler += buf[1];
+     sum += adler;
+     adler += buf[2];
+     sum += adler;
+     adler += buf[3];
+     sum += adler;
+  } while (--n);
+  return adler | (sum << 16);
+}