public override void Visit(VariableReferenceExpression node)
{
UnsupportedExpression(node);
}
public virtual ICodeNode VisitVariableReferenceExpression(VariableReferenceExpression node)
{
return(node);
}
public virtual void VisitVariableReferenceExpression(VariableReferenceExpression node)
{
return;
}
public override ICodeNode VisitVariableReferenceExpression(VariableReferenceExpression node)
{
Expression variableValue;
return(TryGetVariableValue(node.Variable.Resolve(), out variableValue) ? variableValue : node);
}
public XenkoReplaceAppend(HashSet <MethodInvocationExpression> appendList, List <Statement> output, VariableReferenceExpression vre)
: base(false, false)
{
appendMethodsList = appendList;
outputStatements = output;
outputVre = vre;
}
protected override void ProcessMethodInvocation(MethodInvocationExpression invoke, MethodDefinition method)
{
var textureParameters = new List <Parameter>();
var parameterValues = new List <Expression>();
var parameterGlobalValues = new List <Variable>();
var samplerTypes = new List <int>();
for (int i = 0; i < method.Parameters.Count; i++)
{
var parameter = method.Parameters[i];
if (parameter.Type is TextureType || parameter.Type.IsStateType())
{
textureParameters.Add(parameter);
// Find global variable
var parameterValue = this.FindGlobalVariable(invoke.Arguments[i]);
// Set the tag ScopeValue for the current parameter
parameter.SetTag(ScopeValueKey, parameterValue);
// Add only new variable
if (!parameterGlobalValues.Contains(parameterValue))
{
parameterGlobalValues.Add(parameterValue);
}
}
else if (i < invoke.Arguments.Count)
{
parameterValues.Add(invoke.Arguments[i]);
if (parameter.Type.IsSamplerType())
{
samplerTypes.Add(i);
}
}
}
// We have texture/sampler parameters. We need to generate a new specialized method
if (textureParameters.Count > 0)
{
// Order parameter values by name
parameterGlobalValues.Sort((left, right) => left.Name.Text.CompareTo(right.Name.Text));
var methodKey = new TextureSamplerMethodKey(method);
int indexOf = textureSamplerMethods.IndexOf(methodKey);
if (indexOf < 0)
{
methodKey.Initialize(cloneContext);
textureSamplerMethods.Add(methodKey);
}
else
{
// If a key is found again, add it as it was reused in order to keep usage in order
methodKey = textureSamplerMethods[indexOf];
textureSamplerMethods.RemoveAt(indexOf);
textureSamplerMethods.Add(methodKey);
}
methodKey.Invokers.Add(invoke);
var newTarget = new VariableReferenceExpression(methodKey.NewMethod.Name)
{
TypeInference = { Declaration = methodKey.NewMethod, TargetType = invoke.TypeInference.TargetType }
};
invoke.Target = newTarget;
invoke.Arguments = parameterValues;
invoke.TypeInference.Declaration = methodKey.NewMethod;
invoke.TypeInference.TargetType = invoke.TypeInference.TargetType;
this.VisitDynamic(methodKey.NewMethod);
}
else
{
// Visit the method callstack
this.VisitDynamic(method);
// There is an anonymous sampler type
// We need to resolve its types after the method definition was processed
if (samplerTypes.Count > 0)
{
foreach (var samplerTypeIndex in samplerTypes)
{
var samplerRef = invoke.Arguments[samplerTypeIndex] as VariableReferenceExpression;
if (samplerRef != null)
{
var samplerDecl = samplerRef.TypeInference.Declaration as Variable;
ChangeVariableType(samplerDecl, method.Parameters[samplerTypeIndex].Type);
}
}
}
}
// Remove temporary parameters
if (textureParameters.Count > 0)
{
foreach (var textureParameter in textureParameters)
{
textureParameter.RemoveTag(ScopeValueKey);
}
}
}
private static int GetVariableIndex(VariableReferenceExpression variable)
{
return(variable.Variable.Index);
}
public override void Visit(VariableReferenceExpression variableReferenceExpression)
{
base.Visit(variableReferenceExpression);
AddReference(GetDeclarationContainer(), (Node)variableReferenceExpression.TypeInference.Declaration);
}
private void Visit(VariableReferenceExpression variableReferenceExpression)
{
Visit((Node)variableReferenceExpression);
CheckUsage(variableReferenceExpression.TypeInference.Declaration as Variable);
}
private bool HasBeenAlreadyAssignedTo(VariableReferenceExpression variable)
{
return(_variables.ContainsKey(GetVariableIndex(variable)));
}
/// <summary>
/// Generates the code for an <see cref="VariableReferenceExpression"/>.
/// </summary>
/// <param name="expression">The expression</param>
/// <returns>A BaZic code</returns>
private string GenerateVariableReferenceExpression(VariableReferenceExpression expression)
{
Requires.NotNull(expression.Name, nameof(expression.Name));
return(expression.Name.ToString());
}
public override ICodeNode VisitVariableReferenceExpression(VariableReferenceExpression node)
{
return(base.VisitVariableReferenceExpression(node));
}
public override void VisitVariableReferenceExpression(VariableReferenceExpression node)
{
AddUsage(node.Variable.Resolve());
}
/*
* The following pattern matches BlockStatements with similar content
* {
* stackVariable6 = exception_0 as Exception;
* if (stackVariable6 != null)
* {
* ProjectData.SetProjectError(stackVariable6);
* ex = stackVariable6;
* stackVariable15 = Program.Bool() && b is int;
* }
* else
* {
* stackVariable15 = false;
* }
* stackVariable15;
* }
* - stackVariable6 = exception_0 as Exception; - the VariableDeclarationExpression is build using this variable reference
* - Program.Bool() && b is int - The filter expression
* - ex = stackVariable6; - Not required line, if present the variable reference is used to build the VariableDeclarationExpression
* - ProjectData.SetProjectError(stackVariable6); - Not required line. It is generated by the VB compiler. It could be after ex = stackVariable6;
*/
public static bool TryMatch(BlockStatement filter, out VariableDeclarationExpression variableDeclaration, out Expression filterExpression)
{
variableDeclaration = null;
filterExpression = null;
if (!TryMatchVariableDeclaration(filter, out variableDeclaration))
{
return(false);
}
// Save cast of the exception
// If-else statement for the filter expression
// Variable reference of the result of the filter block
if (filter.Statements.Count != 3)
{
return(false);
}
IfStatement ifStatement = filter.Statements[1] as IfStatement;
if (ifStatement == null)
{
return(false);
}
BlockStatement exceptionAssignmentBlock = null;
BlockStatement negativeFilterResultAssignmentBlock = null;
if ((ifStatement.Condition as BinaryExpression).Operator == BinaryOperator.ValueInequality)
{
exceptionAssignmentBlock = ifStatement.Then;
negativeFilterResultAssignmentBlock = ifStatement.Else;
}
else
{
exceptionAssignmentBlock = ifStatement.Else;
negativeFilterResultAssignmentBlock = ifStatement.Then;
}
ExpressionStatement exceptionAssignmentStatement = null;
ExpressionStatement methodInvocationStatement = null;
if ((exceptionAssignmentBlock.Statements.Count != 1 && exceptionAssignmentBlock.Statements.Count != 2 && exceptionAssignmentBlock.Statements.Count != 3) ||
negativeFilterResultAssignmentBlock.Statements.Count != 1)
{
return(false);
}
if (exceptionAssignmentBlock.Statements.Count == 2)
{
ExpressionStatement firstThenStatement = exceptionAssignmentBlock.Statements[0] as ExpressionStatement;
if (firstThenStatement == null)
{
return(false);
}
if (firstThenStatement.Expression.CodeNodeType == CodeNodeType.BinaryExpression)
{
exceptionAssignmentStatement = firstThenStatement;
}
else if (firstThenStatement.Expression.CodeNodeType == CodeNodeType.MethodInvocationExpression)
{
methodInvocationStatement = firstThenStatement;
}
else
{
return(false);
}
}
else if (exceptionAssignmentBlock.Statements.Count == 3)
{
ExpressionStatement firstThenStatement = exceptionAssignmentBlock.Statements[0] as ExpressionStatement;
ExpressionStatement secondThenStatement = exceptionAssignmentBlock.Statements[1] as ExpressionStatement;
if (firstThenStatement == null || secondThenStatement == null)
{
return(false);
}
if (firstThenStatement.Expression.CodeNodeType == CodeNodeType.BinaryExpression &&
secondThenStatement.Expression.CodeNodeType == CodeNodeType.MethodInvocationExpression)
{
exceptionAssignmentStatement = firstThenStatement;
methodInvocationStatement = secondThenStatement;
}
else if (firstThenStatement.Expression.CodeNodeType == CodeNodeType.MethodInvocationExpression &&
secondThenStatement.Expression.CodeNodeType == CodeNodeType.BinaryExpression)
{
methodInvocationStatement = firstThenStatement;
exceptionAssignmentStatement = secondThenStatement;
}
else
{
return(false);
}
}
if (exceptionAssignmentStatement != null)
{
BinaryExpression exceptionAssignment = exceptionAssignmentStatement.Expression as BinaryExpression;
if (exceptionAssignment == null || !exceptionAssignment.IsAssignmentExpression ||
exceptionAssignment.ExpressionType.FullName != variableDeclaration.ExpressionType.FullName)
{
return(false);
}
VariableReferenceExpression left = exceptionAssignment.Left as VariableReferenceExpression;
VariableReferenceExpression right = exceptionAssignment.Right as VariableReferenceExpression;
if (left == null || right == null)
{
return(false);
}
}
if (methodInvocationStatement != null)
{
MethodInvocationExpression methodInvocation = methodInvocationStatement.Expression as MethodInvocationExpression;
if (methodInvocation == null ||
methodInvocation.MethodExpression.Method.FullName != "System.Void Microsoft.VisualBasic.CompilerServices.ProjectData::SetProjectError(System.Exception)")
{
return(false);
}
}
ExpressionStatement lastExpressionStatement = filter.Statements[2] as ExpressionStatement;
if (lastExpressionStatement == null)
{
return(false);
}
VariableReferenceExpression lastExpression = lastExpressionStatement.Expression as VariableReferenceExpression;
if (lastExpression == null)
{
return(false);
}
if (!TryMatchFilterExpression(ifStatement, variableDeclaration.Variable.VariableType, lastExpression, out filterExpression))
{
return(false);
}
return(true);
}
public Statement FixToSwitch(IfStatement node, VariableReferenceExpression stringVariable, VariableReferenceExpression intVariable)
{
/// The checks in the matcher ensured that the first statement in <paramref name="node"/> is an if statement, and
/// that the dictionary is filled inside it's Then body.
///
this.theIntVariable = intVariable;
this.theStringVariable = stringVariable;
if (node.Then.Statements.Count != 2)
{
// sanity check;
return(node);
}
if (!(node.Then.Statements[0] is IfStatement) || !(node.Then.Statements[1] is IfStatement))
{
/// sanity checks
return(node);
}
FillValueDictionary((node.Then.Statements[0] as IfStatement).Then);
BlockStatement result = FixSwitchingIf((node.Then.Statements[1] as IfStatement).Then);
node.Then.Statements.Clear();
node.Then = result;
return(node);
}
public override void VisitVariableReferenceExpression(VariableReferenceExpression node)
{
cil.EmitInstruction(OpCodes.Ldloc, node.Variable.Index);
}
public override void VisitVariableReferenceExpression(VariableReferenceExpression node)
{
Write(node.Variable.Name);
}
public virtual void VisitVariableReferenceExpression(VariableReferenceExpression expression)
{
VisitNode(expression.Identifier);
VisitCommonExpNodes(expression);
}
public void Visit(VariableReferenceExpression variableReferenceExpression)
{
Visit((Node)variableReferenceExpression);
AddReference(GetDeclarationContainer(), (Node)variableReferenceExpression.TypeInference.Declaration);
}
public override void VisitVariableReferenceExpression(VariableReferenceExpression node)
{
referenceToDeclarationStatementMap.Remove(node.Variable);
bannedVariables.Add(node.Variable);
}
public override void Visit(VariableReferenceExpression node)
{
CannotOptimize(node);
}
public override Node Visit(VariableReferenceExpression variableRef)
{
((ScopeDeclarationWithRef)ScopeStack.Peek()).VariableReferences.Add(variableRef);
return(variableRef);
}
public override Node Visit(VariableReferenceExpression variableReferenceExpression)
{
var expression = (Expression)base.Visit(variableReferenceExpression);
return(ProcessExpression(expression));
}
public Statement FixToSwitch(IfStatement node, VariableReferenceExpression stringVariable, VariableReferenceExpression intVariable)
{
this.theIntVariable = intVariable;
this.theStringVariable = stringVariable;
if (node.get_Then().get_Statements().get_Count() != 2)
{
return(node);
}
if (node.get_Then().get_Statements().get_Item(0) as IfStatement == null || node.get_Then().get_Statements().get_Item(1) as IfStatement == null)
{
return(node);
}
this.FillValueDictionary((node.get_Then().get_Statements().get_Item(0) as IfStatement).get_Then());
V_0 = this.FixSwitchingIf((node.get_Then().get_Statements().get_Item(1) as IfStatement).get_Then());
node.get_Then().get_Statements().Clear();
node.set_Then(V_0);
return(node);
}
public override ICodeNode VisitVariableReferenceExpression(VariableReferenceExpression node)
{
this.AddReferencedVariable(node.get_Variable().Resolve());
return(node);
}
private static Expression GetQueryExpression(ActionFlowGraph afg)
{
IDictionary <int, Expression> variables = new Dictionary <int, Expression>();
ActionBlock block = afg.Blocks[0];
while (block != null)
{
switch (block.ActionType)
{
case ActionType.Invoke:
InvokeActionBlock invokeBlock = (InvokeActionBlock)block;
MethodInvocationExpression invocation = invokeBlock.Expression;
if (IsActivateInvocation(invocation) ||
IsNoSideEffectIndirectActivationInvocation(invocation))
{
block = invokeBlock.Next;
break;
}
UnsupportedExpression(invocation);
break;
case ActionType.ConditionalBranch:
UnsupportedPredicate("Conditional blocks are not supported.");
break;
case ActionType.Branch:
block = ((BranchActionBlock)block).Target;
break;
case ActionType.Assign:
{
AssignActionBlock assignBlock = (AssignActionBlock)block;
AssignExpression assign = assignBlock.AssignExpression;
VariableReferenceExpression variable = assign.Target as VariableReferenceExpression;
if (null == variable)
{
UnsupportedExpression(assign);
}
else
{
if (variables.ContainsKey(variable.Variable.Index))
{
UnsupportedExpression(assign.Expression);
}
variables.Add(variable.Variable.Index, assign.Expression);
block = assignBlock.Next;
}
break;
}
case ActionType.Return:
{
Expression expression = ((ReturnActionBlock)block).Expression;
VariableReferenceExpression variable = expression as VariableReferenceExpression;
return(null == variable
? expression
: variables[variable.Variable.Index]);
}
}
}
return(null);
}
protected virtual ICodeNode GetNewValue(VariableReferenceExpression node)
{
return(value);
}
public override ICodeNode VisitVariableReferenceExpression(VariableReferenceExpression node)
{
this.methodContext.VariablesToRename.Add(node.Variable.Resolve());
return(base.VisitVariableReferenceExpression(node));
}
private bool TryMatchInternal(StatementCollection statements, int startIndex, out Statement result)
{
result = null;
if (startIndex + 1 >= statements.Count)
{
return(false);
}
if (statements[startIndex].CodeNodeType != CodeNodeType.ExpressionStatement ||
statements[startIndex + 1].CodeNodeType != CodeNodeType.IfStatement)
{
return(false);
}
ExpressionStatement eventVariableAssignmentStatement = (statements[startIndex] as ExpressionStatement);
if (eventVariableAssignmentStatement.Expression.CodeNodeType != CodeNodeType.BinaryExpression)
{
return(false);
}
BinaryExpression eventVariableAssignmentExpression = eventVariableAssignmentStatement.Expression as BinaryExpression;
if (eventVariableAssignmentExpression.Left.CodeNodeType != CodeNodeType.VariableReferenceExpression ||
eventVariableAssignmentExpression.Right.CodeNodeType != CodeNodeType.EventReferenceExpression)
{
return(false);
}
VariableReferenceExpression eventVariableDeclaration = eventVariableAssignmentExpression.Left as VariableReferenceExpression;
EventReferenceExpression eventReferenceExpression = eventVariableAssignmentExpression.Right as EventReferenceExpression;
IfStatement theIf = statements[startIndex + 1] as IfStatement;
if (theIf.Then == null ||
theIf.Else != null ||
theIf.Condition.CodeNodeType != CodeNodeType.BinaryExpression)
{
return(false);
}
BinaryExpression condition = theIf.Condition as BinaryExpression;
if (condition.Left.CodeNodeType != CodeNodeType.VariableReferenceExpression ||
condition.Right.CodeNodeType != CodeNodeType.LiteralExpression ||
condition.Operator != BinaryOperator.ValueInequality)
{
return(false);
}
VariableReferenceExpression eventVariableReference = condition.Left as VariableReferenceExpression;
if (eventVariableDeclaration.Variable != eventVariableReference.Variable)
{
return(false);
}
LiteralExpression theLiteral = condition.Right as LiteralExpression;
if (theLiteral.Value != null)
{
return(false);
}
StatementCollection thenStatements = theIf.Then.Statements;
if (thenStatements.Count != 1 ||
thenStatements[0].CodeNodeType != CodeNodeType.ExpressionStatement)
{
return(false);
}
ExpressionStatement delegateInvocationStatement = thenStatements[0] as ExpressionStatement;
if (delegateInvocationStatement.Expression.CodeNodeType != CodeNodeType.DelegateInvokeExpression)
{
return(false);
}
DelegateInvokeExpression delegateInvocationExpression = delegateInvocationStatement.Expression as DelegateInvokeExpression;
if (delegateInvocationExpression.Target.CodeNodeType != CodeNodeType.VariableReferenceExpression)
{
return(false);
}
VariableReferenceExpression delegateInvocationVariableReferece = delegateInvocationExpression.Target as VariableReferenceExpression;
if (delegateInvocationVariableReferece.Variable != eventVariableDeclaration.Variable)
{
return(false);
}
List <Instruction> instructions = new List <Instruction>();
instructions.AddRange(eventVariableAssignmentStatement.UnderlyingSameMethodInstructions);
instructions.AddRange(theIf.UnderlyingSameMethodInstructions);
result = new ExpressionStatement(new RaiseEventExpression(eventReferenceExpression.Event, delegateInvocationExpression.InvokeMethodReference, delegateInvocationExpression.Arguments, instructions));
return(true);
}
protected void Visit(VariableReferenceExpression variableRef)
{
((ScopeDeclarationWithRef)ScopeStack.Peek()).VariableReferences.Add(variableRef);
}
public virtual void Visit(VariableReferenceExpression node)
{
}