Mesa (master): i965: Add a second successor to BRW_OPCODE_WHILE

[Neil Roberts]

Module: Mesa
Branch: master
Commit: 728d7bc85f1f101875349690bf1637037a5a1817
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=728d7bc85f1f101875349690bf1637037a5a1817

Author: Neil Roberts <neil at linux.intel.com>
Date:   Mon Oct  5 13:50:56 2015 +0200

i965: Add a second successor to BRW_OPCODE_WHILE

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.

Reviewed-by: Matt Turner <mattst88 at gmail.com>

---

 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 */