Bug 1640686 - Disable an assert when using Warp (bustage fix for feature disabled by default)

Differential Revision: https://phabricator.services.mozilla.com/D77569

js/src/jit/MIR.h

@@ -10686,8 +10686,10 @@ class MIsCallable : public MUnaryInstruction,
                     public BoxExceptPolicy<0, MIRType::Object>::Data {
   explicit MIsCallable(MDefinition* object)
       : MUnaryInstruction(classOpcode, object) {
-    MOZ_ASSERT(object->type() == MIRType::Object ||
-               object->type() == MIRType::Value);
+    MOZ_ASSERT_IF(
+        !JitOptions.warpBuilder,
+        object->type() == MIRType::Object || object->type() == MIRType::Value);
+
     setResultType(MIRType::Boolean);
     setMovable();
   }