Add testcase for div_i in JIT

Apparently has a negative number bug

Author: bdw

t/moar/51-jit-div_i.t

@@ -0,0 +1,24 @@
+#!/usr/bin/env nqp-m
+
+nqp::say("plan 1..1");
+sub foo(int $i, int $j) {
+    my int $x := nqp::div_i($i, $j);
+}
+
+sub test-div() {
+    my int $i := 0;
+    while ($i < 200) {
+        my int $y := foo(-1, 10);
+        if ($y != -1) {
+            return 0;
+        }
+        $i := $i + 1;
+    }
+}
+
+if (test-div()) {
+    nqp::say("ok div_i");
+} else {
+    my int $result := foo(-1,10);
+    nqp::say("not ok div_i $result");
+}