Revert the new EH instructions

This reverts commits r241888-r241891, I didn't mean to commit them.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241893 91177308-0d34-0410-b5e6-96231b3b80d8

lib/IR/BasicBlock.cpp

@@ -197,7 +197,7 @@ BasicBlock::iterator BasicBlock::getFirstInsertionPt() {
     return end();
 
   iterator InsertPt = FirstNonPHI;
-  if (InsertPt->isEHBlock()) ++InsertPt;
+  if (isa<LandingPadInst>(InsertPt)) ++InsertPt;
   return InsertPt;
 }