From 3c03718fd7813b9023c286101d4f972aa3390de9 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Marek=20Ol=C5=A1=C3=A1k?= <marek.olsak@amd.com>
Date: Fri, 13 Mar 2020 17:54:35 -0400
Subject: [PATCH] nir: fix clip/cull_distance_array_size in
 nir_lower_clip_cull_distance_arrays
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This fixes a GPU hang on radeonsi.

It only works if optimizations have already been run.

Cc: 19.3 20.0 <mesa-stable@lists.freedesktop.org>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>
Tested-by: Marge Bot <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4194>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/4194>
---
 .../nir/nir_lower_clip_cull_distance_arrays.c         | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/compiler/nir/nir_lower_clip_cull_distance_arrays.c b/src/compiler/nir/nir_lower_clip_cull_distance_arrays.c
index 70578d6f3fd..7587bb26e09 100644
--- a/src/compiler/nir/nir_lower_clip_cull_distance_arrays.c
+++ b/src/compiler/nir/nir_lower_clip_cull_distance_arrays.c
@@ -72,8 +72,17 @@ combine_clip_cull(nir_shader *nir,
          cull = var;
    }
 
-   if (!cull && !clip)
+   if (!cull && !clip) {
+      /* If this is run after optimizations and the variables have been
+       * eliminated, we should update the shader info, because no other
+       * place does that.
+       */
+      if (store_info) {
+         nir->info.clip_distance_array_size = 0;
+         nir->info.cull_distance_array_size = 0;
+      }
       return false;
+   }
 
    if (!cull && clip) {
       /* The GLSL IR lowering pass must have converted these to vectors */
-- 
2.30.2