--- /dev/null
+# This file is part of NIT ( http://www.nitlanguage.org ).
+#
+# Copyright 2009 Jean-Sebastien Gelinas <calestar@gmail.com>
+#
+# 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.
+
+# This package introduces an algorithm to find all methods reachable
+# from at least one reachable initializer
+package reachable_from_init_method_analysis_impl
+
+import reachable_from_init_method_analysis
+import reachable_method_analysis
+
+class RFIMABuilder
+ readable var _program: Program
+ readable var _context: RFIMAContext = new RFIMAContext
+
+ init (p: Program) do
+ _program = p
+ end
+
+ fun work do
+ program.with_each_live_local_classes !action(c) do
+ # For each reachable constructors for this class
+ for g in c.global_properties do
+ var p = c[g]
+ if not p.global.is_init_for(c) then continue
+ assert p isa MMMethod
+ if not program.rma.as(not null).is_method_reachable(p) then continue
+ if not c.new_instance_iroutine.has_key(p) then continue
+ var ir = c.new_instance_iroutine[p]
+
+ # Process this constructor
+ context.reachable_from_init_iroutines.add(ir)
+ (new RFIMAVisitor(context, program)).visit_iroutine(ir)
+ end
+ end
+ end
+end
+
+class RFIMAContext
+special ReachableFromInitMethodAnalysis
+ readable var _reachable_from_init_iroutines: HashSet[IRoutine] = new HashSet[IRoutine]
+
+ redef fun is_iroutine_reachable_from_init(ir: nullable IRoutine): Bool do
+ return ir != null and reachable_from_init_iroutines.has(ir)
+ end
+
+ redef fun is_method_reachable_from_init(method: MMMethod): Bool do
+ return is_iroutine_reachable_from_init(method.iroutine)
+ end
+end
+
+class RFIMAVisitor
+special ICodeVisitor
+ readable var _context: RFIMAContext
+ readable var _program: Program
+
+ init (context: RFIMAContext, p: Program) do
+ _context = context
+ _program = p
+ end
+
+ fun process_call(iroutine: IRoutine) do
+ if context.is_iroutine_reachable_from_init(iroutine) then return
+ context.reachable_from_init_iroutines.add(iroutine)
+ visit_iroutine(iroutine)
+ end
+
+ redef fun visit_icode(ic)
+ do
+ if ic isa IStaticCall then
+ # FIXME: take only the last property on the redef. hierarchie
+ var ir = ic.property.iroutine
+ if ir != null then process_call(ir)
+ else if ic isa INew then
+ # FIXME: take only the last property on the redef. hierarchie
+ var t = ic.stype
+ var cls = t.for_module(program.module).local_class
+ var m = cls[ic.property.global].as(MMMethod)
+ var r = cls.new_instance_iroutine[m]
+ process_call(r)
+ else if ic isa ISuper then
+ # Process possible calls
+ var method = ic.property
+ for greater in method.prhe.greaters_and_self do
+ if greater isa MMMethod then
+ var ir = greater.iroutine
+ if ir != null then process_call(ir)
+ end
+ end
+ else if ic isa ICall then
+ # Process possible calls
+ var method = ic.property
+ var ir = method.iroutine
+ if ir != null then process_call(ir)
+ for other in method.prhe.smallers do
+ if other isa MMMethod then
+ ir = other.iroutine
+ if ir != null then process_call(ir)
+ end
+ end
+ else if ic isa ICheckInstance then
+ var t = ic.stype
+ var cls = t.for_module(program.module).local_class
+ var ir = cls.checknew_iroutine
+ if ir != null then process_call(ir)
+ else if ic isa IInitAttributes then
+ var t = ic.stype
+ var cls = t.for_module(program.module).local_class
+ var ir = cls.init_var_iroutine
+ if ir != null then process_call(ir)
+ end
+ super
+ end
+end
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