ssa: fix ssa.Index and indexType

cl/_testrt/index/in.go

@@ -1,25 +1,33 @@
 package main
 
-import "github.com/goplus/llgo/c"
-
 type point struct {
 	x int
 	y int
 }
 
+type N [2]int
+type T *N
+type S []int
+
 func main() {
 	a := [...]point{{1, 2}, {3, 4}, {5, 6}}[2]
-	c.Printf(c.Str("%d %d\n"), a.x, a.y)
+	println(a.x, a.y)
 
 	b := [...][2]int{[2]int{1, 2}, [2]int{3, 4}}[1]
-	c.Printf(c.Str("%d %d\n"), b[0], b[1])
+	println(b[0], b[1])
 
 	var i int = 2
-	n := [...]int{1, 2, 3, 4, 5}[i]
-	c.Printf(c.Str("%d\n"), n)
-	c.Printf(c.Str("%d\n"), [...]int{1, 2, 3, 4, 5}[i])
+	println([...]int{1, 2, 3, 4, 5}[i])
 
 	s := "123456"
-	c.Printf(c.Str("%c\n"), s[i])
-	c.Printf(c.Str("%c\n"), "123456"[1])
+	println(string(s[i]))
+	println(string("123456"[1]))
+
+	var n = N{1, 2}
+	var t T = &n
+	println(t[1])
+	var s1 = S{1, 2, 3, 4}
+	println(s1[1])
+
+	println([2]int{}[0])
 }