1 files changed, 23 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/loop-2.c b/gcc/testsuite/gcc.dg/loop-2.c
new file mode 100644
index 000000000..fa96f8927
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/loop-2.c
@@ -0,0 +1,23 @@
+/* PR optimization/10171 */
+/* Bug: unroll_loop misoptimized the function so that we got
+   0 iterations of the loop rather than the correct 1.  */
+/* { dg-do run } */
+
+extern void abort (void);
+extern void exit (int);
+
+__inline__ int tag() { return 0; }
+
+void f ();
+
+int main() {
+  int i;
+  for (i = 0; i < (tag() ? 2 : 1); i++)
+    f();
+  abort ();
+}
+
+void f ()
+{
+  exit (0);
+}