From ce40d81d464affa628f306c9ec86ad62fa2b408e Mon Sep 17 00:00:00 2001
From: Faith Ekstrand <faith.ekstrand@collabora.com>
Date: Mon, 23 Oct 2023 10:36:59 -0500
Subject: [PATCH] nak: Call nir_lower_subgroups()

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24998>
---
 src/nouveau/compiler/nak_nir.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/nouveau/compiler/nak_nir.c b/src/nouveau/compiler/nak_nir.c
index f1467afe47d..4df0728b7b9 100644
--- a/src/nouveau/compiler/nak_nir.c
+++ b/src/nouveau/compiler/nak_nir.c
@@ -215,6 +215,19 @@ nak_preprocess_nir(nir_shader *nir, const struct nak_compiler *nak)
    OPT(nir, nir_lower_var_copies);
    OPT(nir, nir_lower_system_values);
    OPT(nir, nir_lower_compute_system_values, NULL);
+
+   const nir_lower_subgroups_options subgroups_options = {
+      .subgroup_size = 32,
+      .ballot_bit_size = 32,
+      .ballot_components = 1,
+      .lower_to_scalar = true,
+      .lower_vote_eq = true,
+      .lower_first_invocation_to_ballot = true,
+      .lower_read_first_invocation = true,
+      .lower_elect = true,
+      .lower_inverse_ballot = true,
+   };
+   OPT(nir, nir_lower_subgroups, &subgroups_options);
 }
 
 static uint16_t