From 18f9f17be522394575ba5ea88335a561ee5c4789 Mon Sep 17 00:00:00 2001
From: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Date: Mon, 22 Apr 2024 10:20:14 -0400
Subject: [PATCH] zink: make unassigned io variables unreachable

this should no longer be possible to hit

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28884>
---
 src/gallium/drivers/zink/zink_compiler.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/gallium/drivers/zink/zink_compiler.c b/src/gallium/drivers/zink/zink_compiler.c
index 512cf05e82e..f29ef2e7563 100644
--- a/src/gallium/drivers/zink/zink_compiler.c
+++ b/src/gallium/drivers/zink/zink_compiler.c
@@ -2643,6 +2643,8 @@ assign_producer_var_io(gl_shader_stage stage, nir_variable *var, unsigned *reser
    unsigned slot = var->data.location;
    switch (slot) {
    case -1:
+      unreachable("there should be no UINT32_MAX location variables!");
+      break;
    case VARYING_SLOT_POS:
    case VARYING_SLOT_PSIZ:
    case VARYING_SLOT_LAYER: