Re: [PATCH 0/6] MR748: vkd3d-shader/hlsl: Implement loop unrolling.

[Nikolay Sivov (＠nsivov)]

Nikolay Sivov (@nsivov) commented about libs/vkd3d-shader/hlsl_codegen.c:
> -
> - list_move_head(&block->instrs, &draft.instrs);
> - hlsl_block_cleanup(&tmp_dst);
> - hlsl_block_cleanup(&draft);
> -
> - for (i = 0; i < LOOP_UNROLLING_DEFAULT_MAX_ITERATIONS + 1; ++i)
> -
>    copy_propagation_state_destroy(&partial_states[i]);
> -
> - return true;
> -
>
> +fail:
> - hlsl_block_cleanup(&draft);
> - hlsl_block_cleanup(&tmp_dst);
> -
> - for (i = 0; i < LOOP_UNROLLING_DEFAULT_MAX_ITERATIONS + 1; ++i)
> -
>    copy_propagation_state_destroy(&partial_states[i]);

I find 1024 iteration loops disturbing. Why do we need to save this state? Could you give a small example for how this runs, and what gets saved.