1 files changed, 9 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr42630.c b/gcc/testsuite/gcc.dg/pr42630.c
new file mode 100644
index 000000000..34543dab5
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr42630.c
@@ -0,0 +1,9 @@
+/* { dg-do compile } */
+/* { dg-options "-O1 -fvariable-expansion-in-unroller -funroll-loops -fcompare-debug" } */
+
+int sum(int *buf, int len)
+{
+  int s = 0;
+  while (--len > 0) s += *buf++;
+  return s;
+}