Issue #3049 - Add minimal LoongArch JIT regression coverage

js/src/jit-test/tests/basic/loongarch-minimal-jit.js

@@ -0,0 +1,25 @@
+function add(a, b) {
+  return a + b;
+}
+
+function withLocal(a, b) {
+  var c = a + b;
+  var d = c - 1;
+  return d + 1;
+}
+
+function overflow(a, b) {
+  return a + b;
+}
+
+function unsupported(a, b) {
+  return a + (b + 0.5);
+}
+
+for (var i = 0; i < 100; i++) {
+  assertEq(add(i, i + 1), (i + i + 1));
+  assertEq(withLocal(i, 7), i + 7);
+}
+
+assertEq(overflow(2147483647, 1), 2147483648);
+assertEq(unsupported(2, 3), 5.5);