Conor McCarthy : vkd3d-shader/dxil: Emit an error if a CMPXCHG instruction uses a forward-referenced pointer.

[Alexandre Julliard]

Module: vkd3d
Branch: master
Commit: 05510c118ab07c323307b9bde886c8c65f586b73
URL:    https://gitlab.winehq.org/wine/vkd3d/-/commit/05510c118ab07c323307b9bde886c8...

Author: Conor McCarthy <cmccarthy(a)codeweavers.com>
Date:   Sat Apr 27 00:13:10 2024 +1000

vkd3d-shader/dxil: Emit an error if a CMPXCHG instruction uses a forward-referenced pointer.

---

 libs/vkd3d-shader/dxil.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libs/vkd3d-shader/dxil.c b/libs/vkd3d-shader/dxil.c
index 5bb05058..556902c2 100644
--- a/libs/vkd3d-shader/dxil.c
+++ b/libs/vkd3d-shader/dxil.c
@@ -6462,7 +6462,8 @@ static void sm6_parser_emit_cmpxchg(struct sm6_parser *sm6, const struct dxil_re
     uint64_t code;
 
     if (!(ptr = sm6_parser_get_value_by_ref(sm6, record, NULL, &i))
-            || !sm6_value_validate_is_pointer_to_i32(ptr, sm6))
+            || !sm6_value_validate_is_pointer_to_i32(ptr, sm6)
+            || !sm6_value_validate_is_backward_ref(ptr, sm6))
         return;
 
     if (ptr->u.reg.type != VKD3DSPR_GROUPSHAREDMEM)