Remove respond_to check from Class#bind_call

Author: jhawthorn

benchmark/object_allocate.yml

@@ -45,4 +45,5 @@ benchmark:
   allocate_kwarg_params: "KWArg.new(a: 1, b: 2, c: 3, d: 4)"
   allocate_mixed_params: "Mixed.new(1, 2, c: 3, d: 4)"
   allocate_no_params: "Object.new"
+  allocate_allocate: "Object.allocate"
 loop_count: 100000

object.c

@@ -2138,17 +2138,6 @@ static VALUE class_call_alloc_func(rb_alloc_func_t allocator, VALUE klass);
  *
  */
 
-static VALUE
-rb_class_alloc_m(VALUE klass)
-{
-    rb_alloc_func_t allocator = class_get_alloc_func(klass);
-    if (!rb_obj_respond_to(klass, rb_intern("allocate"), 1)) {
-        rb_raise(rb_eTypeError, "calling %"PRIsVALUE".allocate is prohibited",
-                 klass);
-    }
-    return class_call_alloc_func(allocator, klass);
-}
-
 static VALUE
 rb_class_alloc(VALUE klass)
 {
@@ -4603,8 +4592,8 @@ InitVM_Object(void)
     rb_define_method(rb_cModule, "deprecate_constant", rb_mod_deprecate_constant, -1); /* in variable.c */
     rb_define_method(rb_cModule, "singleton_class?", rb_mod_singleton_p, 0);
 
-    rb_define_method(rb_singleton_class(rb_cClass), "allocate", rb_class_alloc_m, 0);
-    rb_define_method(rb_cClass, "allocate", rb_class_alloc_m, 0);
+    rb_define_method(rb_singleton_class(rb_cClass), "allocate", rb_class_alloc, 0);
+    rb_define_method(rb_cClass, "allocate", rb_class_alloc, 0);
     rb_define_method(rb_cClass, "new", rb_class_new_instance_pass_kw, -1);
     rb_define_method(rb_cClass, "initialize", rb_class_initialize, -1);
     rb_define_method(rb_cClass, "superclass", rb_class_superclass, 0);

test/ruby/test_class.rb

@@ -283,12 +283,8 @@ def test_uninitialized
     assert_raise(TypeError, bug6863) { Class.new(Class.allocate) }
 
     allocator = Class.instance_method(:allocate)
-    assert_raise_with_message(TypeError, /prohibited/) {
-      allocator.bind(Rational).call
-    }
-    assert_raise_with_message(TypeError, /prohibited/) {
-      allocator.bind_call(Rational)
-    }
+    assert_nothing_raised { allocator.bind(Rational).call }
+    assert_nothing_raised { allocator.bind_call(Rational) }
   end
 
   def test_nonascii_name