i965/cfg: Assert that cur_do/while/if pointers are non-NULL.

More.. like in commit 4d93a07c.

diff --git a/src/mesa/drivers/dri/i965/brw_cfg.cpp b/src/mesa/drivers/dri/i965/brw_cfg.cpp
index f1f230e3751b5b73f9f34baa831b75791e769921..91d53eff5a709cfc971a84ffbafe4d6c7284d320 100644 (file)
--- a/src/mesa/drivers/dri/i965/brw_cfg.cpp
+++ b/src/mesa/drivers/dri/i965/brw_cfg.cpp
@@ -208,6 +208,7 @@ cfg_t::cfg_t(exec_list *instructions)
          cur_else = cur;
 
         next = new_block();
+         assert(cur_if != NULL);
         cur_if->add_successor(mem_ctx, next);
 
         set_next_block(&cur, next, ip);
@@ -274,6 +275,7 @@ cfg_t::cfg_t(exec_list *instructions)
          inst->exec_node::remove();
          cur->instructions.push_tail(inst);
 
+         assert(cur_do != NULL);
         cur->add_successor(mem_ctx, cur_do);
 
         next = new_block();
@@ -287,6 +289,7 @@ cfg_t::cfg_t(exec_list *instructions)
          inst->exec_node::remove();
          cur->instructions.push_tail(inst);
 
+         assert(cur_while != NULL);
         cur->add_successor(mem_ctx, cur_while);
 
         next = new_block();