/// <summary>
/// Get the size of the IL opcodes for this expression.
/// <param name="context">The context of the block containing the expression</param>
/// <param name="dropResult">Toggles if the result of the expression should be also put on the stack or just dropped.</param>
/// </summary>
public ILCount GetILCount(IBlockContext context, bool dropResult)
{
IBlockContext countingContext = context.CloneCountingContext();
EmitCode(countingContext, dropResult);
return(new ILCount {
opCodes = countingContext.IL.ILSize,
stack = countingContext.IL.StackCount
});
}
private ILCount EstimateLoop(IBlockContext context, IForInSource source)
{
IBlockContext prepContext = context.CloneCountingContext();
sourceExpression.EmitCode(prepContext, false);
source.EmitInitialize(prepContext);
IBlockContext countingContext = prepContext.CloneCountingContext()
.CreateLoopContext(context.IL.DefineLabel(false), context.IL.DefineLabel(false));
IBlockVariable loopVariable = countingContext.DeclaredVariable(variableName, true, source.ElementType);
LabelRef loop = countingContext.IL.DefineLabel(false);
source.EmitNext(countingContext);
loopVariable.EmitStore(countingContext);
loopExpression.EmitCode(countingContext, true);
source.EmitCheckDone(countingContext, loop);
return(new ILCount {
opCodes = countingContext.IL.ILSize,
stack = countingContext.IL.StackCount
});
}
