i965: Assert that SYSTEM_VALUE_VERTEX_ID gets lowered

fs_visitor::emit_vs_system_value() looks like it's trying to handle
SYSTEM_VALUE_VERTEX_ID, but we should never see that value in the
backend.

Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

diff --git a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
index b6405cd5f0d2d0ad1a0a4598157422d31c5f6fe5..7036ad8b57c10b9824f8b34319ac7f21a69d1390 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
+++ b/src/mesa/drivers/dri/i965/brw_fs_visitor.cpp
@@ -46,6 +46,7 @@ fs_visitor::emit_vs_system_value(int location)
       vs_prog_data->uses_vertexid = true;
       break;
    case SYSTEM_VALUE_VERTEX_ID:
+      unreachable("should have been lowered");
    case SYSTEM_VALUE_VERTEX_ID_ZERO_BASE:
       reg->reg_offset = 2;
       vs_prog_data->uses_vertexid = true;