From 6fd4dc353c8c92c1ddc76af34269c9b9a5f47df5 Mon Sep 17 00:00:00 2001
From: Matt Turner <mattst88@gmail.com>
Date: Thu, 14 Aug 2025 10:47:34 -0700
Subject: [PATCH] elk/algebraic: Protect SHUFFLE from OOB indices

Akin to b67230de635 ("intel/fs: Protect opt_algebraic from OOB BROADCAST
indices"), we need to protect SHUFFLE as well.

Reviewed-by: Sagar Ghuge <sagar.ghuge@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36779>
---
 src/intel/compiler/elk/elk_fs.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/intel/compiler/elk/elk_fs.cpp b/src/intel/compiler/elk/elk_fs.cpp
index 772f5c43673..2645a7963c7 100644
--- a/src/intel/compiler/elk/elk_fs.cpp
+++ b/src/intel/compiler/elk/elk_fs.cpp
@@ -2530,9 +2530,9 @@ elk_fs_visitor::opt_algebraic()
             inst->sources = 1;
             progress = true;
          } else if (inst->src[1].file == IMM) {
+            const unsigned comp = inst->src[1].ud & (inst->exec_size - 1);
             inst->opcode = ELK_OPCODE_MOV;
-            inst->src[0] = component(inst->src[0],
-                                     inst->src[1].ud);
+            inst->src[0] = component(inst->src[0], comp);
             inst->sources = 1;
             progress = true;
          }