void RewriteAsIsInst(ref BasicBlock block)
{
Scanner.LogDebug(1, $"REWRITE AS ISINST: {block.Count} {block}");
var reference = Assembly.MainModule.ImportReference(InstanceType);
int index = 1;
BlockList.InsertInstructionAt(ref block, index++, Instruction.Create(OpCodes.Isinst, reference));
BlockList.InsertInstructionAt(ref block, index++, Instruction.Create(OpCodes.Dup));
BlockList.ReplaceInstructionAt(ref block, index++, Instruction.Create(OpCodes.Stloc, Variable));
BlockList.RemoveInstructionAt(ref block, index);
switch (block.BranchType)
{
case BranchType.False:
case BranchType.True:
break;
case BranchType.None:
case BranchType.Return:
// Convert it into a bool.
BlockList.InsertInstructionAt(ref block, index++, Instruction.Create(OpCodes.Ldnull));
BlockList.InsertInstructionAt(ref block, index++, Instruction.Create(OpCodes.Cgt_Un));
break;
default:
throw DebugHelpers.AssertFailUnexpected(Method, block, block.BranchType);
}
}