From 24197aeb2bfb3e5e1633974ffa455f77df22c422 Mon Sep 17 00:00:00 2001
From: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Date: Tue, 2 Apr 2024 10:18:45 -0400
Subject: [PATCH] zink: only use location_frac for deref array indexing for
 compact variables

not sure why I did this or how it ever worked?

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28466>
---
 src/gallium/drivers/zink/zink_compiler.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gallium/drivers/zink/zink_compiler.c b/src/gallium/drivers/zink/zink_compiler.c
index dfb21b84863bd..1ab47b14d9895 100644
--- a/src/gallium/drivers/zink/zink_compiler.c
+++ b/src/gallium/drivers/zink/zink_compiler.c
@@ -3677,7 +3677,7 @@ add_derefs_instr(nir_builder *b, nir_intrinsic_instr *intr, void *data)
       }
       if (glsl_type_is_array(type)) {
          /* unroll array derefs */
-         unsigned idx = frac - var->data.location_frac;
+         unsigned idx = var->data.compact ? (frac - var->data.location_frac) : 0;
          assert(src_offset);
          if (var->data.location < VARYING_SLOT_VAR0) {
             if (src_offset) {