From 0e1922550dd68772da8de74a7330f0ec596bb169 Mon Sep 17 00:00:00 2001
From: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Date: Mon, 13 Apr 2026 18:29:53 +0300
Subject: [PATCH] elk: don't support frontfacing ternary optimization on !=
 32bit

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Cc: mesa-stable
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com>
(cherry picked from commit 4dfedcca45c960656cd7eb5e966fc72a5f6f0015)

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40979>
---
 .pick_status.json                     | 2 +-
 src/intel/compiler/elk/elk_fs_nir.cpp | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/.pick_status.json b/.pick_status.json
index cf97a78d2e9..16754322229 100644
--- a/.pick_status.json
+++ b/.pick_status.json
@@ -614,7 +614,7 @@
         "description": "elk: don't support frontfacing ternary optimization on != 32bit",
         "nominated": true,
         "nomination_type": 1,
-        "resolution": 0,
+        "resolution": 1,
         "main_sha": null,
         "because_sha": null,
         "notes": null
diff --git a/src/intel/compiler/elk/elk_fs_nir.cpp b/src/intel/compiler/elk/elk_fs_nir.cpp
index 01bb43fbc33..8c2d302b7b9 100644
--- a/src/intel/compiler/elk/elk_fs_nir.cpp
+++ b/src/intel/compiler/elk/elk_fs_nir.cpp
@@ -545,6 +545,9 @@ optimize_frontfacing_ternary(nir_to_elk_state &ntb,
    const intel_device_info *devinfo = ntb.devinfo;
    elk_fs_visitor &s = ntb.s;
 
+   if (instr->def.bit_size != 32)
+      return false;
+
    nir_intrinsic_instr *src0 = nir_src_as_intrinsic(instr->src[0].src);
    if (src0 == NULL || src0->intrinsic != nir_intrinsic_load_front_face)
       return false;