From 7e86653a6f58efbf78b4c1f530c49de9513d687d Mon Sep 17 00:00:00 2001
From: Mary Guillemard <mary.guillemard@collabora.com>
Date: Thu, 14 Aug 2025 10:23:30 +0000
Subject: [PATCH] pan/bi: remove dead variables in preprocess

This should have no effect apart cleaning up NIR_DEBUG print outputs a
bit.

Signed-off-by: Mary Guillemard <mary.guillemard@collabora.com>
Reviewed-by: Olivia Lee <olivia.lee@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36776>
---
 src/panfrost/compiler/bifrost_compile.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/panfrost/compiler/bifrost_compile.c b/src/panfrost/compiler/bifrost_compile.c
index dc14c0b8fb8..70333eaff8a 100644
--- a/src/panfrost/compiler/bifrost_compile.c
+++ b/src/panfrost/compiler/bifrost_compile.c
@@ -5962,6 +5962,10 @@ bifrost_preprocess_nir(nir_shader *nir, unsigned gpu_id)
    NIR_PASS(_, nir, nir_lower_vars_to_ssa);
 
    bi_optimize_loop_nir(nir, gpu_id, true);
+
+   /* Lower away all variables for smaller shaders */
+   NIR_PASS(_, nir, nir_lower_vars_to_ssa);
+   NIR_PASS(_, nir, nir_remove_dead_variables, nir_var_all, NULL);
 }
 
 void