예제 #1
0
        public override void GenerateCode(AbsynCodeGenerator codeGen, StructureNode node, StructureNode latchNode, AbsynStatementEmitter emitter)
        {
            codeGen.EmitLinearBlockStatements(node, emitter);
            if (node == latchNode)
                return;

            var exp = codeGen.BranchCondition(node);
            var ifStm = EmitIfCondition(exp, this, emitter);

            var succ = FirstBranch(node);
            var emitThen = new AbsynStatementEmitter(ifStm.Then);
            if (node.UnstructType == UnstructuredType.JumpInOutLoop)
            {
                codeGen.DeferRendering(node, succ, emitThen);
                codeGen.GenerateCode(SecondBranch(node), latchNode, emitter);
            }
            else
            {
                if (Follow == null)
                    throw new NotSupportedException("Null condfollow");
                codeGen.PushFollow(Follow);

                if (node.Conditional is IfThenElse)
                {
                    codeGen.IncompleteNodes.Add(node);
                }

                if (codeGen.IsVisited(succ) || (node.Loop != null && succ == node.Loop.Follow))
                    codeGen.EmitGotoAndForceLabel(node, succ, emitThen);
                else
                    codeGen.GenerateCode(succ, latchNode, emitThen);

                if (node.Conditional is IfThenElse)
                {
                    codeGen.IncompleteNodes.Remove(node);

                    succ = node.Then;
                    AbsynStatementEmitter emitElse = new AbsynStatementEmitter(ifStm.Else);
                    if (codeGen.IsVisited(succ))
                        codeGen.EmitGotoAndForceLabel(node, succ, emitElse);
                    else
                        codeGen.GenerateCode(succ, latchNode, emitElse);

                    if (HasSingleIfThenElseStatement(ifStm.Then))
                    {
                        ifStm.InvertCondition();
                    }
                }

                codeGen.PopFollow();
                codeGen.GenerateCode(Follow, latchNode, emitter);
            }
        }
예제 #2
0
        public override void GenerateCode(AbsynCodeGenerator codeGen, StructureNode node, StructureNode latchNode, AbsynStatementEmitter emitter)
        {
            codeGen.EmitLinearBlockStatements(node, emitter);

            Expression exp = ((SwitchInstruction) node.Instructions.Last.Instruction).Expression;
            AbsynSwitch switchStm = emitter.EmitSwitch(node, exp, new List<AbsynStatement>());
            AbsynStatementEmitter emitSwitchBranches = new AbsynStatementEmitter(switchStm.Statements);

            if (Follow == null)
                throw new NotSupportedException(string.Format("Null follow node for case statement at {0} is not supported.", node.Name));
            codeGen.PushFollow(Follow);
            for (int i = 0; i < node.OutEdges.Count; i++)
            {
                emitSwitchBranches.EmitCaseLabel(node, i);

                StructureNode succ = node.OutEdges[i];
                if (codeGen.IsVisited(succ))
                {
                    codeGen.EmitGotoAndForceLabel(node, succ, emitSwitchBranches);
                }
                else
                {
                    codeGen.GenerateCode(succ, latchNode, emitSwitchBranches);
                    emitSwitchBranches.EmitBreak();
                }
            }
            codeGen.PopFollow();
            codeGen.GenerateCode(Follow, latchNode, emitter);
        }