public override void Visit(SwitchStatement node)
{
VisitNode(node.Expression);
VisitNodes(node.CaseClauses);
Visit((Statement)node);
}
public override void Visit(SwitchStatement node)
{
PushLocation(node);
var switchDone = _ilGen.DefineLabel();
_labelInfos.PushLabel(null, switchDone);
var labels = new System.Reflection.Emit.Label[node.CaseClauses.Count];
var defaultTargetIndex = -1;
for (var caseIndex = 0; caseIndex < node.CaseClauses.Count; ++caseIndex)
{
var c = node.CaseClauses[caseIndex];
var caseTarget = _ilGen.DefineLabel();
labels[caseIndex] = caseTarget;
if (!c.IsDefault)
{
var stackState = _localVars.GetTemporaryStackState();
VisitNode(c.Comparison);
AsBoolean();
_ilGen.Brtrue(caseTarget);
_localVars.PopTemporariesAfter(stackState);
}
else
defaultTargetIndex = caseIndex;
}
if (defaultTargetIndex != -1)
_ilGen.Br(labels[defaultTargetIndex]);
for (var caseIndex = 0; caseIndex < node.CaseClauses.Count; ++caseIndex)
{
var c = node.CaseClauses[caseIndex];
_ilGen.MarkLabel(labels[caseIndex]);
VisitNodes(c.Body.Statements);
}
_ilGen.MarkLabel(switchDone);
_labelInfos.PopLabel(null);
PopLocation();
}
public override void Visit(SwitchStatement node)
{
PushLocation(node);
var breakIndexes = new LinkedList<int>();
_labelInfos.PushLabel(null, breakIndexes);
///We know all case.Compare expressions should only generate one boolean value, except the the default: case
var comparisionResultPointer = _stackModel.StackPointer;
var caseCompareIndexes = new int[node.CaseClauses.Count]; // We will fill those slots after we know the begining index of blocks
var defaultTargetIndex = -1;
for (var caseIndex = 0; caseIndex < node.CaseClauses.Count; ++caseIndex)
{
var c = node.CaseClauses[caseIndex];
if (!c.IsDefault)
{
VisitNode(c.Comparison);
Debug.Assert(_stackModel.StackPointer == comparisionResultPointer + 1, "Invalid situation, stack state did not change correctly in switch statement");
///We will later generate the BrTrue IC here which will Pop the comparision result
///but now we should set the StackPointer correctly for the next CaseClause to visit
_stackModel.Pop(1);
}
else
{
defaultTargetIndex = caseIndex;
}
caseCompareIndexes[caseIndex] = ReserveNewICIndex();
}
Debug.Assert(_stackModel.StackPointer == comparisionResultPointer, "Invalid stack pointer value! Expected {0} instead of {1}", comparisionResultPointer, _stackModel.StackPointer);
for (var caseIndex = 0; caseIndex < node.CaseClauses.Count; ++caseIndex)
{
var c = node.CaseClauses[caseIndex];
BeginICMethod(c);
if (c.IsDefault)
{
Debug.Assert(caseIndex == defaultTargetIndex, "Invalid situation");
Br(GetCurrentICIndex() + 1);
}
else
Brtrue(comparisionResultPointer, GetCurrentICIndex() + 1);
EndICMethod(caseCompareIndexes[caseIndex]);
VisitNodes(c.Body.Statements);
}
UpdateJumps(GetCurrentICIndex() + 1, breakIndexes);
_labelInfos.PopLabel(null);
PopLocation();
}
public override void Visit(SwitchStatement node) { Visit((Statement)node); }
public override void Visit(SwitchStatement node)
{
Visit((Statement)node);
}
public SwitchStatement MakeSwitchStatement(Scope scope, IExpression expression, ICaseClauseList caseClauses)
{
var expr = (Expression)expression;
foreach (var c in caseClauses)
{
if (!c.IsDefault)
{
c.Comparison = MakeSameExpressionInternal(expr, c.Expression);
c.Comparison.AddUser(c);
}
}
var n = new SwitchStatement(expr, caseClauses);
return n;
}
public abstract void Visit(SwitchStatement node);
public override void Visit(SwitchStatement node)
{
throw new NotImplementedException();
}
public override void Visit(SwitchStatement node) { VisitNodes(node.CaseClauses); }