spirv: Assume input attachments are read-only

Reviewed-by: Jesse Natalie <jenatali@microsoft.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/22289>

diff --git a/src/compiler/spirv/vtn_variables.c b/src/compiler/spirv/vtn_variables.c
index 805831e..8db61c8 100644 (file)
--- a/src/compiler/spirv/vtn_variables.c
+++ b/src/compiler/spirv/vtn_variables.c
@@ -1416,6 +1416,7 @@ var_decoration_cb(struct vtn_builder *b, struct vtn_value *val, int member,
       return;
    case SpvDecorationInputAttachmentIndex:
       vtn_var->input_attachment_index = dec->operands[0];
+      vtn_var->access |= ACCESS_NON_WRITEABLE;
       return;
    case SpvDecorationPatch:
       vtn_var->var->data.patch = true;