private static Alloca CreateEntryBlockAlloca(Function theFunction, string varName)
{
var tmpBldr = new InstructionBuilder(theFunction.EntryBlock);
if (theFunction.EntryBlock.FirstInstruction != null)
{
tmpBldr.PositionBefore(theFunction.EntryBlock.FirstInstruction);
}
return(tmpBldr.Alloca(theFunction.Context.DoubleType)
.RegisterName(varName));
}