re PR rtl-optimization/8423 (CSE1 not propagating __builtin_constant_p enough)

	PR optimization/8423
	* gcc.c-torture/execute/builtin-constant.c: New test.

From-SVN: r58760

gcc/testsuite/ChangeLog

+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:

gcc/testsuite/gcc.c-torture/execute/builtin-constant.c

+/* 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);
+}