Lots of preloading for tests

so many relied (implicitly( on some builtin function
after all can't do much in ruby without calling
Now all those dependencies are explicit
Small risc changes come because the macro version has a return label and unreachable label

test/risc/interpreter/calling/test_alloc.rb

@@ -6,23 +6,24 @@ module Risc
     include Ticker
 
     def setup
+      @preload = "Integer.plus"
       @string_input = as_main("return 5 + 5")
       super
     end
 
     def test_chain
-      # show_main_ticks # get output of what is
+      #show_main_ticks # get output of what is
       check_main_chain [LoadConstant, SlotToReg, RegToSlot, LoadConstant, SlotToReg, #5
                  RegToSlot, LoadConstant, SlotToReg, RegToSlot, LoadConstant, #10
                  SlotToReg, RegToSlot, SlotToReg, FunctionCall, LoadConstant, #15
                  SlotToReg, LoadConstant, OperatorInstruction, IsNotZero, SlotToReg, #20
                  RegToSlot, SlotToReg, SlotToReg, SlotToReg, SlotToReg, #25
-                 OperatorInstruction, RegToSlot, RegToSlot, SlotToReg, SlotToReg, #30
-                 Branch, RegToSlot, SlotToReg, SlotToReg, SlotToReg, #35
-                 FunctionReturn, SlotToReg, RegToSlot, Branch, SlotToReg, #40
-                 SlotToReg, RegToSlot, SlotToReg, SlotToReg, SlotToReg, #45
-                 FunctionReturn, Transfer, SlotToReg, SlotToReg, Syscall, #50
-                 NilClass,] #55
+                 OperatorInstruction, RegToSlot, RegToSlot, SlotToReg, RegToSlot, #30
+                 Branch, Branch, SlotToReg, SlotToReg, RegToSlot, #35
+                 SlotToReg, SlotToReg, SlotToReg, FunctionReturn, SlotToReg, #40
+                 RegToSlot, Branch, SlotToReg, SlotToReg, RegToSlot, #45
+                 SlotToReg, SlotToReg, SlotToReg, FunctionReturn, Transfer, #50
+                 SlotToReg, SlotToReg, Syscall, NilClass,] #55
        assert_equal 10 , get_return
     end
     def base_ticks(num)