1 files changed, 26 insertions, 0 deletions
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 000000000..9e5bfb8bf
--- /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);
+}