setting registers in the allocator

unfortunately the reg instances are spread across instructions
this causes problems when setting them

test/risc/instructions/test_load_data.rb

@@ -21,4 +21,26 @@ module Risc
       assert_equal  "Integer_Type" , risc(1).register.type.name
     end
   end
+  # following tests are really Instruction tests, but would require mocking there
+  class TestInstructionProtocol < MiniTest::Test
+    def setup
+      Parfait.boot!({})
+      @load = Risc.load_data("source" , 1)
+    end
+    def test_reg_names
+      assert_equal 1 , @load.register_names.length
+    end
+    def test_reg_get
+      reg = @load.register_names.first
+      assert_equal :fix_1 , reg
+    end
+    def test_reg_set
+      @load.set_registers(:fix_1 , :r10)
+      assert_equal :r10 , @load.get_register(:register)
+    end
+    def test_reg_ssa
+      value = @load.set_registers(:register , :r10)
+      assert_equal :fix_1 , @load.get_register(:register)
+    end
+  end
 end