set line of exception handling basic blocks to zero

llvm/lib/Transforms/IPO/WholeProgramInstrumentDumpper.cpp

@@ -13,20 +13,22 @@ struct VisBasicBlock {
 
         VisBasicBlock(BasicBlock &BB, unsigned Function)
             : Line(-1u), LineEnd(0), Function(Function) {
-                for (auto &Inst : BB) {
-                        if (auto Loc = Inst.getDebugLoc()) {
-                                if (Loc.getLine() == 0)
-                                        continue;
-                                auto theLoc = Loc.get();
-                                if (auto loc_tmp = theLoc->getInlinedAt()) {
-                                  while (loc_tmp->getInlinedAt()) {
-                                    loc_tmp = loc_tmp->getInlinedAt();
+                if (BB.begin()->getOpcode() != Instruction::LandingPad) {
+                  for (auto &Inst : BB) {
+                          if (auto Loc = Inst.getDebugLoc()) {
+                                  if (Loc.getLine() == 0)
+                                          continue;
+                                  auto theLoc = Loc.get();
+                                  if (auto loc_tmp = theLoc->getInlinedAt()) {
+                                    while (loc_tmp->getInlinedAt()) {
+                                      loc_tmp = loc_tmp->getInlinedAt();
+                                    }
+                                    theLoc = loc_tmp;
                                   }
-                                  theLoc = loc_tmp;
-                                }
-                                Line = std::min(Line, theLoc->getLine());
-                                LineEnd = std::max(LineEnd, theLoc->getLine());
-                        }
+                                  Line = std::min(Line, theLoc->getLine());
+                                  LineEnd = std::max(LineEnd, theLoc->getLine());
+                          }
+                  }
                 }
                 // Restore to 0 when debug info is not available
                 if (Line == -1u)