diff options
| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-07-30 17:36:47 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2012-07-30 17:36:47 +0000 |
| commit | f192b507a33b2ab2e2f6271bb1ea6ed4fbda69e7 (patch) | |
| tree | 7c3710f48b15574a38d629954464e3af71b6005f /lib/CodeGen/MachineBasicBlock.cpp | |
| parent | 97baaeaeb22e7336590b8745bd181425ca410cb5 (diff) | |
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@160968 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/MachineBasicBlock.cpp')
| -rw-r--r-- | lib/CodeGen/MachineBasicBlock.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/CodeGen/MachineBasicBlock.cpp b/lib/CodeGen/MachineBasicBlock.cpp index ecc1e951fa..f361d1ac29 100644 --- a/lib/CodeGen/MachineBasicBlock.cpp +++ b/lib/CodeGen/MachineBasicBlock.cpp @@ -540,9 +540,12 @@ MachineBasicBlock::transferSuccessorsAndUpdatePHIs(MachineBasicBlock *fromMBB) { } } +bool MachineBasicBlock::isPredecessor(const MachineBasicBlock *MBB) const { + return std::find(pred_begin(), pred_end(), MBB) != pred_end(); +} + bool MachineBasicBlock::isSuccessor(const MachineBasicBlock *MBB) const { - const_succ_iterator I = std::find(Successors.begin(), Successors.end(), MBB); - return I != Successors.end(); + return std::find(succ_begin(), succ_end(), MBB) != succ_end(); } bool MachineBasicBlock::isLayoutSuccessor(const MachineBasicBlock *MBB) const { |