From 13d621cc7cd24ff1811b240aa81860c65366dcce Mon Sep 17 00:00:00 2001
From: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
Date: Wed, 8 Apr 2026 09:20:25 +0200
Subject: [PATCH] avcodec/snow: Disable dead code in ff_snow_inner_add_yblock()

It is only used with add != 0 (and the assembly functions
only support this case).

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
---
 libavcodec/snow.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/libavcodec/snow.c b/libavcodec/snow.c
index fa191c08c0..b6aa94e1ce 100644
--- a/libavcodec/snow.c
+++ b/libavcodec/snow.c
@@ -20,6 +20,7 @@
 
 #include <assert.h>
 
+#include "libavutil/avassert.h"
 #include "libavutil/log.h"
 #include "libavutil/mem.h"
 #include "libavutil/thread.h"
@@ -118,6 +119,9 @@ void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride, uint8_
                               int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8){
     int y, x;
     IDWTELEM * dst;
+
+    av_assume(add); // add == 0 is currently unused
+
     for(y=0; y<b_h; y++){
         //FIXME ugly misuse of obmc_stride
         const uint8_t *obmc1= obmc + y*obmc_stride;