--- /dev/null	Sat Dec 14 13:56:51 2002

+++ gcc-3.3.1/gcc/testsuite/gcc.dg/pr10392-1.c	Sun Sep 14 14:28:24 2003

@@ -0,0 +1,62 @@

+/* PR optimization/10392

+ * Reporter: marcus@mc.pp.se

+ * Summary: [3.3/3.4 regression] [SH] optimizer generates faulty array indexing

+ * Description:

+ * The address calculation of an index operation on an array on the stack 

+ * can _under some conditions_ get messed up completely

+ *

+ * Testcase tweaked by dank@kegel.com

+ * Problem only happens with -O2 -m4, so it should only happen on sh4,

+ * but what the heck, let's test other architectures, too.

+ * Not marked as xfail since it's a regression.

+*/

+/* { dg-do run } */

+/* { dg-options "-O2" } */

+/* { dg-options "-O2 -m4" { target sh4-*-* } } */

+const char *dont_optimize_function_away;

+

+const char *use(const char *str)

+{

+	dont_optimize_function_away = str;

+	if (str[0] != 'v')

+		abort();

+	if (str[1] < '1' || str[1] > '6')

+		abort();

+	if (str[2])

+		abort();

+	return str[2] ? "notused" : "v6";

+}

+

+const char *func(char *a, char *b)

+{

+	char buf[128];

+	unsigned char i;

+	const char *result;

+

+	char *item[] = {

+		"v1",

+		"v2",

+	};

+

+	buf[0] = 'v';

+	buf[1] = '3';

+	buf[2] = 0;

+

+	for (i = 0; i < 2; i++) {

+		/* bug is: following line passes wild pointer to use() on sh4 -O2 */

+		result = use(item[i]);

+

+		use(buf);

+		use(a);

+		use(b);

+		result = use(result);

+	}

+	return result;

+}

+

+int main()

+{

+	func("v4", "v5");

+	return 0;

+}

+