From fee94ca15bc257e7dcaa5fc137a484bead1e866b Mon Sep 17 00:00:00 2001 From: Jakob Stoklund Olesen Date: Mon, 30 Jul 2012 17:36:47 +0000 Subject: 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 --- llvm/lib/CodeGen/MachineBasicBlock.cpp | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) (limited to 'llvm/lib/CodeGen/MachineBasicBlock.cpp') diff --git a/llvm/lib/CodeGen/MachineBasicBlock.cpp b/llvm/lib/CodeGen/MachineBasicBlock.cpp index ecc1e951..f361d1a 100644 --- a/llvm/lib/CodeGen/MachineBasicBlock.cpp +++ b/llvm/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 { -- cgit v1.1