Mesa (master): r600g/sb: Skip empty ALU clause while scheduling

[Dave Airlie]

Module: Mesa
Branch: master
Commit: 17d69862a9232e2bcdfa032c5a65c27557dd9275
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=17d69862a9232e2bcdfa032c5a65c27557dd9275

Author: Glenn Kennard <glenn.kennard at gmail.com>
Date:   Wed Apr  8 11:30:37 2015 +0200

r600g/sb: Skip empty ALU clause while scheduling

Fixes assert triggered by
ext_transform_feedback-intervening-read output use_gs
piglit test.

Signed-off-by: Glenn Kennard <glenn.kennard at gmail.com>
Signed-off-by: Dave Airlie <airlied at redhat.com>

---

 src/gallium/drivers/r600/sb/sb_sched.cpp |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/gallium/drivers/r600/sb/sb_sched.cpp b/src/gallium/drivers/r600/sb/sb_sched.cpp
index 4248a3f..2e38a62 100644
--- a/src/gallium/drivers/r600/sb/sb_sched.cpp
+++ b/src/gallium/drivers/r600/sb/sb_sched.cpp
@@ -825,6 +825,9 @@ void post_scheduler::init_regmap() {
 
 void post_scheduler::process_alu(container_node *c) {
 
+	if (c->empty())
+		return;
+
 	ucm.clear();
 	alu.reset();