nitvm: Using SSA module in the nitvm

Signed-off-by: Julien Pagès <julien.projet@gmail.com>

diff --git a/src/vm/compilation.nit b/src/vm/compilation.nit
new file mode 100644 (file)
index 0000000..5dca966
--- /dev/null
+++ b/src/vm/compilation.nit
@@ -0,0 +1,60 @@
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2015 Julien Pagès <julien.pages@lirmm.fr>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# The compilation module of the VirtualMachine
+module compilation
+
+import variables_numbering
+import ssa
+
+redef class VirtualMachine
+
+       # The currently analyzed APropdef
+       var current_propdef: APropdef
+
+       redef fun new_frame(node, mpropdef, args)
+       do
+               # Save the current propdef
+               if node isa APropdef then self.current_propdef = node
+
+               return super
+       end
+end
+
+redef class APropdef
+
+       redef fun compile(vm)
+       do
+               super
+
+               # A new instance of SSA to analyze the self propdef
+               var ssa = new SSA(self)
+
+               # Generate basic_blocks and compute SSA-algorithm for this propdef
+               compute_ssa(ssa)
+       end
+
+       # Redef to add the same position to a new version of a Variable than the original variable
+       redef fun generate_name(v, counter, expr, ssa)
+       do
+               var new_version = super
+
+               # All versions of a variable have the same position in the environment
+               new_version.position = v.original_variable.position
+
+               return new_version
+       end
+end

diff --git a/src/vm/vm.nit b/src/vm/vm.nit
index 4027a15..e98d2da 100644 (file)
--- a/src/vm/vm.nit
+++ b/src/vm/vm.nit
@@ -20,3 +20,4 @@ module vm
 import virtual_machine
 import vm_optimizations
 import variables_numbering
+import compilation