Apparently some MachineBasicBlock's don't have corresponding llvm basic blocks.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64340 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/ScheduleDAGPrinter.cpp b/lib/CodeGen/ScheduleDAGPrinter.cpp
index e2ae5a0..594c24d 100644
--- a/lib/CodeGen/ScheduleDAGPrinter.cpp
+++ b/lib/CodeGen/ScheduleDAGPrinter.cpp
@@ -83,9 +83,13 @@
void ScheduleDAG::viewGraph() {
// This code is only for debugging!
#ifndef NDEBUG
- ViewGraph(this, "dag." + MF.getFunction()->getName(),
- "Scheduling-Units Graph for " + MF.getFunction()->getName() + ':' +
- BB->getBasicBlock()->getName());
+ if (BB->getBasicBlock())
+ ViewGraph(this, "dag." + MF.getFunction()->getName(),
+ "Scheduling-Units Graph for " + MF.getFunction()->getName() + ':' +
+ BB->getBasicBlock()->getName());
+ else
+ ViewGraph(this, "dag." + MF.getFunction()->getName(),
+ "Scheduling-Units Graph for " + MF.getFunction()->getName());
#else
cerr << "ScheduleDAG::viewGraph is only available in debug builds on "
<< "systems with Graphviz or gv!\n";