src/vm/compilation.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2015 Julien Pagès <julien.pages@lirmm.fr>
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16
  17 # The compilation module of the VirtualMachine
  18 module compilation
  19
  20 import variables_numbering
  21 import ssa
  22
  23 redef class VirtualMachine
  24
  25         # The currently analyzed APropdef
  26         var current_propdef: APropdef
  27
  28         redef fun new_frame(node, mpropdef, args)
  29         do
  30                 # Save the current propdef
  31                 if node isa APropdef then self.current_propdef = node
  32
  33                 return super
  34         end
  35 end
  36
  37 redef class APropdef
  38
  39         redef fun compile(vm)
  40         do
  41                 super
  42
  43                 # A new instance of SSA to analyze the self propdef
  44                 var ssa = new SSA(self)
  45
  46                 # Generate basic_blocks and compute SSA-algorithm for this propdef
  47                 compute_ssa(ssa)
  48         end
  49
  50         # Redef to add the same position to a new version of a Variable than the original variable
  51         redef fun generate_name(v, counter, expr, ssa)
  52         do
  53                 var new_version = super
  54
  55                 # All versions of a variable have the same position in the environment
  56                 new_version.position = v.original_variable.position
  57
  58                 return new_version
  59         end
  60 end