diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 2b88c1f85d3..be1e6026bde 100644
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,8 @@
+2002-11-02  Diego Novillo  <dnovillo@redhat.com>
+
+	PR optimization/8423
+	* gcc.c-torture/execute/builtin-constant.c: New test.
+
 2002-11-01  Zack Weinberg  <zack@codesourcery.com>
 
 	* g++.dg/ext/typedef-init.C, gcc.dg/typedef-init.C:
diff --git a/gcc/testsuite/gcc.c-torture/execute/builtin-constant.c b/gcc/testsuite/gcc.c-torture/execute/builtin-constant.c
new file mode 100644
index 00000000000..9e5bfb8bfe8
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/execute/builtin-constant.c
@@ -0,0 +1,26 @@
+/* PR optimization/8423.  */
+
+#define btest(x) __builtin_constant_p(x) ? "1" : "0"
+
+#ifdef __OPTIMIZE__
+void
+foo (char *i)
+{
+  if (*i == '0')
+    abort ();
+}
+#else
+void
+foo (char *i)
+{
+}
+#endif
+
+int
+main (void)
+{
+  int size = sizeof (int);
+  foo (btest (size));
+  foo (btest (size));
+  exit (0);
+}