Bug 1666142: Add tests r=jandem

Differential Revision: https://phabricator.services.mozilla.com/D91185

js/src/jit-test/tests/warp/bug1666142-1.js

@@ -0,0 +1,19 @@
+// |jit-test| --fast-warmup
+
+// This test triggers a GC in CreateThisForIC,
+// without using the arguments rectifier.
+var records = [];
+function Record() {
+    return Object.create(null);
+}
+function init() {
+    records.push(new Record());
+}
+function f() {
+    for (var i = 0; i < 100; i++) {
+        init();
+    }
+}
+
+gczeal(14,25);
+f();

js/src/jit-test/tests/warp/bug1666142-2.js

@@ -0,0 +1,19 @@
+// |jit-test| --fast-warmup
+
+// This test triggers a GC in CreateThisForIC,
+// while using the arguments rectifier.
+var records = [];
+function Record(val) {
+    return Object.create(null);
+}
+function init() {
+    records.push(new Record());
+}
+function f() {
+    for (var i = 0; i < 100; i++) {
+        init();
+    }
+}
+
+gczeal(14,25);
+f();