two more test cases concering Convs and Divs

[r21089]

ir/be/test/divs.c

+int x = 42;
+int y = 10;
+
+int signed_div(int x, int y) {
+	printf("%d (should be 4)\n", x / y);
+	printf("%d (should be 2)\n", x % y);
+	return (x / y) + (x % y);
+}
+
+unsigned int unsigned_div(unsigned int x, unsigned int y) {
+	printf("%u (should be 4)\n", x / y);
+	printf("%u (should be 2)\n", x % y);
+	return (x / y) + (x % y);
+}
+
+double f_div(double x, double y) {
+	printf("%f (should be 4.2)\n", x / y);
+	return (x / y);
+}
+
+int main(void) {
+	int x = signed_div(42, 10)
+			+ unsigned_div(42, 10)
+			+ f_div(42.0, 10.0);
+	return 16-x;
+}

ir/be/test/most_complex_conv.c

+unsigned int MAX_INT = 4294967295;
+
+int main(void) {
+	double res = MAX_INT;
+	printf("Res: %f\n", res);
+	return 0;
+}