test local cse

[r15799]

ir/be/test/csetest.c

+/*$ -fno-inline $*/
+#include <stdio.h>
+
+int cse1(int a) {
+		int x = a * 3;
+		int y = 3 * a;
+		return x + y;
+}
+
+int cse2(int a, int b) {
+		int x = a * b;
+		int y = b * a;
+		return x - y;
+}
+
+int main() {
+		printf("cse1(3) = %d (should be 18)\n", cse1(3));
+		printf("cse2(3,4) = %d (should be 0)\n", cse2(3,4));
+		return 0;
+}