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Disable the logic added by rafael in commit 133415 to see if it brings the
dragonegg buildbots back to life. Original commit message: Teach early dup how to duplicate basic blocks with one successor and only phi instructions into more complex blocks. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@133430 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -707,7 +707,7 @@ TailDuplicatePass::TailDuplicate(MachineBasicBlock *TailBB, MachineFunction &MF,
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DenseSet<unsigned> UsedByPhi;
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getRegsUsedByPHIs(*TailBB, &UsedByPhi);
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if (isSimpleBB(TailBB))
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if (0 && isSimpleBB(TailBB)) // Disabled to see if doing so fixes buildbots.
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return duplicateSimpleBB(TailBB, TDBBs, UsedByPhi, Copies);
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// Iterate through all the unique predecessors and tail-duplicate this
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