Add MachineBasicBlock::isPredecessor().
A->isPredecessor(B) is the same as B->isSuccessor(A), but it can tolerate a B that is null or dangling. This shouldn't happen normally, but it it useful for verification code. llvm-svn: 160968
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@ -379,6 +379,10 @@ public:
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/// which refer to fromMBB to refer to this.
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void transferSuccessorsAndUpdatePHIs(MachineBasicBlock *fromMBB);
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/// isPredecessor - Return true if the specified MBB is a predecessor of this
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/// block.
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bool isPredecessor(const MachineBasicBlock *MBB) const;
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/// isSuccessor - Return true if the specified MBB is a successor of this
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/// block.
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bool isSuccessor(const MachineBasicBlock *MBB) const;
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@ -540,9 +540,12 @@ MachineBasicBlock::transferSuccessorsAndUpdatePHIs(MachineBasicBlock *fromMBB) {
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}
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}
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bool MachineBasicBlock::isPredecessor(const MachineBasicBlock *MBB) const {
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return std::find(pred_begin(), pred_end(), MBB) != pred_end();
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}
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bool MachineBasicBlock::isSuccessor(const MachineBasicBlock *MBB) const {
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const_succ_iterator I = std::find(Successors.begin(), Successors.end(), MBB);
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return I != Successors.end();
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return std::find(succ_begin(), succ_end(), MBB) != succ_end();
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}
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bool MachineBasicBlock::isLayoutSuccessor(const MachineBasicBlock *MBB) const {
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