Revert "YJIT: Rest and block_arg support (#7557)"

This reverts commit 5d0a1ffafa.

This commit is causing sequel in yjit-bench to raise with this stack trace:

```
sequel-5.64.0/lib/sequel/dataset/sql.rb:266:in `literal': wrong argument type Array (expected Proc) (TypeError)
	from sequel-5.64.0/lib/sequel/database/misc.rb:269:in `literal'
	from sequel-5.64.0/lib/sequel/adapters/shared/sqlite.rb:314:in `column_definition_default_sql'
	from sequel-5.64.0/lib/sequel/database/schema_methods.rb:564:in `block in column_definition_sql'
	from sequel-5.64.0/lib/sequel/database/schema_methods.rb:564:in `each'
	from sequel-5.64.0/lib/sequel/database/schema_methods.rb:564:in `column_definition_sql'
	from sequel-5.64.0/lib/sequel/database/schema_methods.rb:634:in `block in column_list_sql'
	from sequel-5.64.0/lib/sequel/database/schema_methods.rb:634:in `map'
	from sequel-5.64.0/lib/sequel/database/schema_methods.rb:634:in `column_list_sql'
	from sequel-5.64.0/lib/sequel/database/schema_methods.rb:753:in `create_table_sql'
	from sequel-5.64.0/lib/sequel/adapters/shared/sqlite.rb:348:in `create_table_sql'
	from sequel-5.64.0/lib/sequel/database/schema_methods.rb:702:in `create_table_from_generator'
	from sequel-5.64.0/lib/sequel/database/schema_methods.rb:203:in `create_table'
	from benchmarks/sequel/benchmark.rb:19:in `<main>'
```

bootstraptest/test_yjit.rb

@@ -3662,24 +3662,3 @@ assert_equal '[1, 2, 3]', %q{
   end
   send(:bar, 1, 2, 3)
 }
-
-# Rest with block
-# Simplified code from railsbench
-assert_equal '[{"/a"=>"b", :as=>:c, :via=>:post}, [], nil]', %q{
-  def match(path, *rest, &block)
-    [path, rest, block]
-  end
-
-  def map_method(method, args, &block)
-    options = args.last
-    args.pop
-    options[:via] = method
-    match(*args, options, &block)
-  end
-
-  def post(*args, &block)
-    map_method(:post, args, &block)
-  end
-
-  post "/a" => "b", as: :c
-}

yjit/src/codegen.rs

@@ -5181,9 +5181,9 @@ fn move_rest_args_to_stack(array: Opnd, num_args: u32, ctx: &mut Context, asm: &
 
     let array_len_opnd = get_array_len(asm, array);
 
-    asm.comment("Side exit if length is less than required");
+    asm.comment("Side exit if length doesn't not equal remaining args");
     asm.cmp(array_len_opnd, num_args.into());
-    asm.jl(counted_exit!(ocb, side_exit, send_iseq_has_rest_and_splat_not_equal));
+    asm.jbe(counted_exit!(ocb, side_exit, send_splatarray_length_not_equal));
 
     asm.comment("Push arguments from array");
 
@@ -5413,6 +5413,11 @@ fn gen_send_iseq(
         return CantCompile;
     }
 
+    if iseq_has_rest && unsafe { get_iseq_flags_has_block(iseq) } {
+        gen_counter_incr!(asm, send_iseq_has_rest_and_block);
+        return CantCompile;
+    }
+
     if iseq_has_rest && unsafe { get_iseq_flags_has_kw(iseq) } {
         gen_counter_incr!(asm, send_iseq_has_rest_and_kw);
         return CantCompile;

yjit/src/stats.rs

@@ -253,10 +253,11 @@ make_counters! {
     send_send_getter,
     send_send_builtin,
     send_iseq_has_rest_and_captured,
+    send_iseq_has_rest_and_splat_fewer,
     send_iseq_has_rest_and_send,
+    send_iseq_has_rest_and_block,
     send_iseq_has_rest_and_kw,
     send_iseq_has_rest_and_optional,
-    send_iseq_has_rest_and_splat_not_equal,
     send_is_a_class_mismatch,
     send_instance_of_class_mismatch,