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);
}
}
public void GenerateCode(AbsynCodeGenerator codeGen, StructureNode node, StructureNode latchNode, AbsynStatementEmitter emitter)
{
if (Follow != null)
codeGen.PushFollow(Follow);
GenerateCodeInner(codeGen, node, emitter);
if (Follow != null)
{
codeGen.PopFollow();
codeGen.GenerateCode(Follow, latchNode, emitter);
}
}
private void RunTest(string sExp)
{
try
{
var acg = new AbsynCodeGenerator();
acg.GenerateCode(curProc, proc.Body);
GenCode(proc, sb);
Assert.AreEqual(sExp, sb.ToString());
}
catch
{
curProc.Dump();
Console.WriteLine(sb.ToString());
throw;
}
}
protected abstract void GenerateCodeInner(AbsynCodeGenerator codeGen, StructureNode node, AbsynStatementEmitter emitter);
protected override void GenerateCodeInner(AbsynCodeGenerator codeGen, StructureNode node, AbsynStatementEmitter emitter)
{
List<AbsynStatement> loopBody = new List<AbsynStatement>();
AbsynStatementEmitter bodyEmitter = new AbsynStatementEmitter(loopBody);
if (node.Conditional != null)
{
node.Conditional.GenerateCode(codeGen, node, Latch, bodyEmitter);
}
else
{
codeGen.EmitLinearBlockStatements(node, bodyEmitter);
if (node.OutEdges.Count != 1)
throw new NotSupportedException(string.Format("Expected top of PostTestedLoop {0} to have only 1 out edge, but found {1} out edges.", node.Name, node.OutEdges.Count));
codeGen.GenerateCode(node.OutEdges[0], Latch, bodyEmitter);
}
emitter.EmitForever(node, loopBody);
}
protected override void GenerateCodeInner(AbsynCodeGenerator codeGen, StructureNode node, AbsynStatementEmitter emitter)
{
codeGen.EmitLinearBlockStatements(node, emitter);
var loopBody = new List<AbsynStatement>();
var bodyNode = (node.Else == node.Loop.Follow)
? node.Then
: node.Else;
var bodyEmitter = new AbsynStatementEmitter(loopBody);
codeGen.GenerateCode(bodyNode, node.Loop.Latch, bodyEmitter);
bodyEmitter.StripDeclarations = true;
codeGen.EmitLinearBlockStatements(node, bodyEmitter);
emitter.EmitWhile(node, codeGen.BranchCondition(node), loopBody);
}
public abstract void GenerateCode(AbsynCodeGenerator codeGen, StructureNode node, StructureNode latchNode, AbsynStatementEmitter emitter);
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);
}
