r600g/sb: Handle undef in read port tracker

e8e443 missed adding check for undef values also in
unreserve function, leading to an assert triggering.

Signed-off-by: Glenn Kennard <glenn.kennard@gmail.com>
Cc: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/gallium/drivers/r600/sb/sb_sched.cpp b/src/gallium/drivers/r600/sb/sb_sched.cpp
index 62680788c5ed90d93489b1c172b3a87f1d7ffa03..c98b8fff764b3734d488925f5a924a5690dbc447 100644 (file)
--- a/src/gallium/drivers/r600/sb/sb_sched.cpp
+++ b/src/gallium/drivers/r600/sb/sb_sched.cpp
@@ -236,7 +236,7 @@ void rp_gpr_tracker::unreserve(alu_node* n) {
 
        for (i = 0; i < nsrc; ++i) {
                value *v = n->src[i];
-               if (v->is_readonly())
+               if (v->is_readonly() || v->is_undef())
                        continue;
                if (i == 1 && opt)
                        continue;