Reviewed-by: Connor Abbott <cwabbo...@gmail.com>
On Sat, Feb 13, 2016 at 9:14 PM, Jason Ekstrand <ja...@jlekstrand.net> wrote:
> ---
> src/compiler/nir/nir_control_flow.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/src/compiler/nir/nir_control_flow.c
> b/src/compiler/nir/nir_control_flow.c
> index ecd9cbd..33b06d0 100644
> --- a/src/compiler/nir/nir_control_flow.c
> +++ b/src/compiler/nir/nir_control_flow.c
> @@ -749,6 +749,12 @@ nir_cf_extract(nir_cf_list *extracted, nir_cursor begin,
> nir_cursor end)
> {
> nir_block *block_begin, *block_end, *block_before, *block_after;
>
> + if (nir_cursors_equal(begin, end)) {
> + exec_list_make_empty(&extracted->list);
> + extracted->impl = NULL; /* we shouldn't need this */
> + return;
> + }
> +
> /* In the case where begin points to an instruction in some basic block
> and
> * end points to the end of the same basic block, we rely on the fact that
> * splitting on an instruction moves earlier instructions into a new basic
> @@ -788,6 +794,9 @@ nir_cf_reinsert(nir_cf_list *cf_list, nir_cursor cursor)
> {
> nir_block *before, *after;
>
> + if (exec_list_is_empty(&cf_list->list))
> + return;
> +
> split_block_cursor(cursor, &before, &after);
>
> foreach_list_typed_safe(nir_cf_node, node, node, &cf_list->list) {
> --
> 2.5.0.400.gff86faf
>
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