+
+ // If the value leaving MBB was defined after the call in MBB, it can't
+ // really be live-in to the landing pad. This can happen if the landing pad
+ // has a PHI, and this register is undef on the exceptional edge.
+ // <rdar://problem/10664933>
+ if (!SlotIndex::isEarlierInstr(VNI->def, LSP.second) && VNI->def < MBBEnd)
+ return LSP.first;
+
+ // Value is properly live-in to the landing pad.
+ // Only allow splits before the call.
+ return LSP.second;
+}
+
+MachineBasicBlock::iterator
+SplitAnalysis::getLastSplitPointIter(MachineBasicBlock *MBB) {
+ SlotIndex LSP = getLastSplitPoint(MBB->getNumber());
+ if (LSP == LIS.getMBBEndIdx(MBB))
+ return MBB->end();
+ return LIS.getInstructionFromIndex(LSP);