Mesa (master): nir/lower_clip_disable: Fix store writemask

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Module: Mesa
Branch: master
Commit: 77fcb01f7f0e9301c994fbae71f8019b32e012db
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=77fcb01f7f0e9301c994fbae71f8019b32e012db

Author: Connor Abbott <cwabbott0 at gmail.com>
Date:   Thu Apr 22 11:58:35 2021 +0200

nir/lower_clip_disable: Fix store writemask

We're storing into the array element, not the whole variable.

Fixes: fb2fe80 ("nir: add lowering pass for clip plane enabling")
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7274>

---

 src/compiler/nir/nir_lower_clip_disable.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/compiler/nir/nir_lower_clip_disable.c b/src/compiler/nir/nir_lower_clip_disable.c
index 6c5958e51de..19f818eff7c 100644
--- a/src/compiler/nir/nir_lower_clip_disable.c
+++ b/src/compiler/nir/nir_lower_clip_disable.c
@@ -101,7 +101,8 @@ lower_clip_plane_store(nir_intrinsic_instr *instr, unsigned clip_plane_enable, n
       if (clip_plane_enable & (1 << plane))
          return false;
 
-      nir_store_deref(b, deref, nir_imm_int(b, 0), 1 << plane);
+      assert(nir_intrinsic_write_mask(instr) == 1);
+      nir_store_deref(b, deref, nir_imm_int(b, 0), 1);
    } else {
       /* storing using a variable index */
       nir_ssa_def *index = nir_ssa_for_src(b, deref->arr.index, 1);