diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 0ccdae9c885..3075046254f 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2008-10-20  Manuel López-Ibáñez  <manu@gcc.gnu.org>
+        
+	PR 12603
+	* gcc.dg/pr12603.c: New testcase.
+
 2008-10-20  Manuel López-Ibáñez  <manu@gcc.gnu.org>
 
 	PR c++/37004
diff --git a/gcc/testsuite/gcc.dg/pr12603.c b/gcc/testsuite/gcc.dg/pr12603.c
new file mode 100644
index 00000000000..d0a4835cb1e
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr12603.c
@@ -0,0 +1,8 @@
+/* PR 12603: No return statement warning on function that never returns with -O3. */
+/* { dg-do compile } */
+/* { dg-options "-O3 -Wall -Wextra -Wreturn-type -Wunreachable-code" } */
+int
+this_function_never_returns ()
+{
+  for (;;);
+}