From 5bd6fd5c105d38a19156bb38acc2c1779078caef Mon Sep 17 00:00:00 2001
From: Emma Anholt <emma@anholt.net>
Date: Thu, 29 May 2025 15:44:28 -0700
Subject: [PATCH] ir3: Enable nir_opt_combine_barriers.

From my fossils db:

Totals from 42 (0.08% of 49975) affected shaders:
Instrs: 108929 -> 108046 (-0.81%)
CodeSize: 182346 -> 179498 (-1.56%)
NOPs: 22106 -> 21916 (-0.86%)
(ss): 5458 -> 4765 (-12.70%)
(sy): 2987 -> 2294 (-23.20%)
Cat0: 24293 -> 24103 (-0.78%)
Cat7: 3939 -> 3246 (-17.59%)

Affected fossils include Danylo's d3d traces, gfxbench, and Sascha Willems's
computenbody.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/35262>
---
 src/freedreno/ir3/ir3_nir.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/freedreno/ir3/ir3_nir.c b/src/freedreno/ir3/ir3_nir.c
index 851138a8f51..355761f032c 100644
--- a/src/freedreno/ir3/ir3_nir.c
+++ b/src/freedreno/ir3/ir3_nir.c
@@ -635,6 +635,7 @@ ir3_finalize_nir(struct ir3_compiler *compiler,
    }
 
    OPT(s, nir_lower_is_helper_invocation);
+   OPT(s, nir_opt_combine_barriers, NULL, NULL);
 
    ir3_optimize_loop(compiler, options, s);