[Mesa-dev] [PATCH 1/2] i965: Add a second successor to BRW_OPCODE_WHILE

[Neil Roberts]

It is possible to directly predicate the WHILE instruction. In this
case there will be a second successor block because the execution can
resume from the instruction after the loop. This will be used in a
subsequent patch.
---
 src/mesa/drivers/dri/i965/brw_cfg.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/brw_cfg.cpp b/src/mesa/drivers/dri/i965/brw_cfg.cpp
index 91d53ef..531fa16 100644
--- a/src/mesa/drivers/dri/i965/brw_cfg.cpp
+++ b/src/mesa/drivers/dri/i965/brw_cfg.cpp
@@ -305,6 +305,10 @@ cfg_t::cfg_t(exec_list *instructions)
 
          assert(cur_do != NULL && cur_while != NULL);
 	 cur->add_successor(mem_ctx, cur_do);
+
+         if (inst->predicate)
+            cur->add_successor(mem_ctx, cur_while);
+
 	 set_next_block(&cur, cur_while, ip);
 
 	 /* Pop the stack so we're in the previous loop */
-- 
1.9.3