+ // If this is an MSVC-style personality function, we need to split the landing
+ // pad into several BBs.
+ const BasicBlock *LLVMBB = MBB->getBasicBlock();
+ const LandingPadInst *LPadInst = LLVMBB->getLandingPadInst();
+ MF->getMMI().addPersonality(
+ MBB, cast<Function>(LPadInst->getPersonalityFn()->stripPointerCasts()));
+ if (MF->getMMI().getPersonalityType() == EHPersonality::MSVC_Win64SEH) {
+ // Make virtual registers and a series of labels that fill in values for the
+ // clauses.
+ auto &RI = MF->getRegInfo();
+ FuncInfo->ExceptionSelectorVirtReg = RI.createVirtualRegister(PtrRC);
+
+ // Get all invoke BBs that will unwind into the clause BBs.
+ SmallVector<MachineBasicBlock *, 4> InvokeBBs(MBB->pred_begin(),
+ MBB->pred_end());
+
+ // Emit separate machine basic blocks with separate labels for each clause
+ // before the main landing pad block.
+ MachineInstrBuilder SelectorPHI = BuildMI(
+ *MBB, MBB->begin(), SDB->getCurDebugLoc(), TII->get(TargetOpcode::PHI),
+ FuncInfo->ExceptionSelectorVirtReg);
+ for (unsigned I = 0, E = LPadInst->getNumClauses(); I != E; ++I) {
+ // Skip filter clauses, we can't implement them yet.
+ if (LPadInst->isFilter(I))
+ continue;
+
+ MachineBasicBlock *ClauseBB = MF->CreateMachineBasicBlock(LLVMBB);
+ MF->insert(MBB, ClauseBB);
+
+ // Add the edge from the invoke to the clause.
+ for (MachineBasicBlock *InvokeBB : InvokeBBs)
+ InvokeBB->addSuccessor(ClauseBB);
+
+ // Mark the clause as a landing pad or MI passes will delete it.
+ ClauseBB->setIsLandingPad();
+
+ GlobalValue *ClauseGV = ExtractTypeInfo(LPadInst->getClause(I));
+
+ // Start the BB with a label.
+ MCSymbol *ClauseLabel = MF->getMMI().addClauseForLandingPad(MBB);
+ BuildMI(*ClauseBB, ClauseBB->begin(), SDB->getCurDebugLoc(), II)
+ .addSym(ClauseLabel);
+
+ // Construct a simple BB that defines a register with the typeid constant.
+ FuncInfo->MBB = ClauseBB;
+ FuncInfo->InsertPt = ClauseBB->end();
+ unsigned VReg = SDB->visitLandingPadClauseBB(ClauseGV, MBB);
+ CurDAG->setRoot(SDB->getRoot());
+ SDB->clear();
+ CodeGenAndEmitDAG();
+
+ // Add the typeid virtual register to the phi in the main landing pad.
+ SelectorPHI.addReg(VReg).addMBB(ClauseBB);
+ }
+
+ // Remove the edge from the invoke to the lpad.
+ for (MachineBasicBlock *InvokeBB : InvokeBBs)
+ InvokeBB->removeSuccessor(MBB);
+
+ // Restore FuncInfo back to its previous state and select the main landing
+ // pad block.
+ FuncInfo->MBB = MBB;
+ FuncInfo->InsertPt = MBB->end();
+ return;
+ }
+ if (MF->getMMI().getPersonalityType() == EHPersonality::MSVC_CXX) {
+ WinEHFuncInfo &FuncInfo = MF->getMMI().getWinEHFuncInfo(MF->getFunction());
+ MF->getMMI().addWinEHState(MBB, FuncInfo.LandingPadStateMap[LPadInst]);
+ }
+