Mesa (master): i965/cfg: Handle no-idom case in cfg_t::dump_domtree().

[Matt Turner]

Module: Mesa
Branch: master
Commit: 9115fa1d132b3ed38180f05c303f9190cde23878
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=9115fa1d132b3ed38180f05c303f9190cde23878

Author: Matt Turner <mattst88 at gmail.com>
Date:   Wed Oct 28 21:11:46 2015 -0700

i965/cfg: Handle no-idom case in cfg_t::dump_domtree().

Reviewed-by: Kenneth Graunke <kenneth at whitecape.org>

---

 src/mesa/drivers/dri/i965/brw_cfg.cpp |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/mesa/drivers/dri/i965/brw_cfg.cpp b/src/mesa/drivers/dri/i965/brw_cfg.cpp
index 10bcd4b..5d46615 100644
--- a/src/mesa/drivers/dri/i965/brw_cfg.cpp
+++ b/src/mesa/drivers/dri/i965/brw_cfg.cpp
@@ -528,7 +528,9 @@ cfg_t::dump_domtree()
 {
    printf("digraph DominanceTree {\n");
    foreach_block(block, this) {
-      printf("\t%d -> %d\n", block->idom->num, block->num);
+      if (block->idom) {
+         printf("\t%d -> %d\n", block->idom->num, block->num);
+      }
    }
    printf("}\n");
 }