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

Reviewed-by: Kenneth Graunke <[email protected]>

1 files changed, 3 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_cfg.cpp b/src/mesa/drivers/dri/i965/brw_cfg.cpp
index 10bcd4bafd4..5d46615bc7b 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");
 }