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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
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@ -83,9 +83,13 @@ std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU,
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void ScheduleDAG::viewGraph() {
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// This code is only for debugging!
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#ifndef NDEBUG
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ViewGraph(this, "dag." + MF.getFunction()->getName(),
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"Scheduling-Units Graph for " + MF.getFunction()->getName() + ':' +
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BB->getBasicBlock()->getName());
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if (BB->getBasicBlock())
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ViewGraph(this, "dag." + MF.getFunction()->getName(),
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"Scheduling-Units Graph for " + MF.getFunction()->getName() + ':' +
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BB->getBasicBlock()->getName());
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else
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ViewGraph(this, "dag." + MF.getFunction()->getName(),
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"Scheduling-Units Graph for " + MF.getFunction()->getName());
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#else
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cerr << "ScheduleDAG::viewGraph is only available in debug builds on "
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<< "systems with Graphviz or gv!\n";
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