public static Context CreateNewBlock(this InstructionSet instructionSet, BasicBlocks basicBlocks)
{
Context ctx = new Context(instructionSet);
ctx.AppendInstruction(IRInstruction.BlockStart);
int start = ctx.Index;
ctx.AppendInstruction(IRInstruction.BlockEnd);
int last = ctx.Index;
BasicBlock block = basicBlocks.CreateBlockWithAutoLabel(start, last);
ctx.BasicBlock = block;
ctx.GotoPrevious();
return ctx;
}
/// <summary>
/// Splits the block.
/// </summary>
/// <param name="ctx">The context.</param>
/// <returns></returns>
private Context Split(Context ctx, BasicBlocks basicBlocks, InstructionSet instructionSet)
{
Context current = ctx.Clone();
Context next = ctx.Clone();
next.AppendInstruction(IRInstruction.BlockStart);
BasicBlock nextBlock = basicBlocks.CreateBlockWithAutoLabel(next.Index, current.BasicBlock.EndIndex);
Context nextContext = new Context(instructionSet, nextBlock);
foreach (BasicBlock block in current.BasicBlock.NextBlocks)
{
nextBlock.NextBlocks.Add(block);
block.PreviousBlocks.Remove(current.BasicBlock);
block.PreviousBlocks.Add(nextBlock);
}
current.BasicBlock.NextBlocks.Clear();
current.AppendInstruction(IRInstruction.BlockEnd);
current.BasicBlock.EndIndex = current.Index;
return nextContext;
}