From: Neil Roberts <neil@linux.intel.com>
Date: Mon, 5 Oct 2015 11:50:56 +0000 (+0200)
Subject: i965: Add a second successor to BRW_OPCODE_WHILE
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=728d7bc85f1f101875349690bf1637037a5a1817;p=mesa.git

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@gmail.com>
---

diff --git a/src/mesa/drivers/dri/i965/brw_cfg.cpp b/src/mesa/drivers/dri/i965/brw_cfg.cpp
index 91d53eff5a7..531fa16b387 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 */