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fix accidentally inverted conditional and add comment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79312 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -128,6 +128,9 @@ MachineBasicBlock::iterator MachineBasicBlock::getFirstTerminator() {
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return I;
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}
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/// isOnlyReachableViaFallthough - Return true if this basic block has
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/// exactly one predecessor and the control transfer mechanism between
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/// the predecessor and this block is a fall-through.
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bool MachineBasicBlock::isOnlyReachableByFallthrough() const {
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// If this is a landing pad, it isn't a fall through. If it has no preds,
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// then nothing falls through to it.
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@ -152,7 +155,7 @@ bool MachineBasicBlock::isOnlyReachableByFallthrough() const {
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// Otherwise, check the last instruction.
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const MachineInstr &LastInst = Pred->back();
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return LastInst.getDesc().isBarrier();
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return !LastInst.getDesc().isBarrier();
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}
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void MachineBasicBlock::dump() const {
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