From 33d2c31d7ad98cc9aeda9fdbf47aa99a1d23de16 Mon Sep 17 00:00:00 2001
From: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Date: Mon, 1 Sep 2025 10:57:48 +0300
Subject: [PATCH] brw: don't use brw_null_reg() for unused SEND sources

Just avoiding the validation assert.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes: 47fe9d28e7 ("brw: Enumerate SHADER_OPCODE_SEND sources and standardize how many")
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/13777
Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/37112>
---
 src/intel/compiler/brw_opt.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/intel/compiler/brw_opt.cpp b/src/intel/compiler/brw_opt.cpp
index 52eca022d1f..6a63777d017 100644
--- a/src/intel/compiler/brw_opt.cpp
+++ b/src/intel/compiler/brw_opt.cpp
@@ -739,7 +739,7 @@ brw_opt_send_gather_to_send(brw_shader &s)
                break;
          }
       } else {
-         payload2 = brw_null_reg();
+         payload2 = brw_reg();
       }
 
       if (payload1_len + payload2_len != num_payload_sources)