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
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