New EH representation for MSVC compatibility

This introduces new instructions neccessary to implement MSVC-compatible
exception handling support.  Most of the middle-end and none of the
back-end haven't been audited or updated to take them into account.

Differential Revision: http://reviews.llvm.org/D11097

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@243766 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/ValueTracking.cpp

@@ -3147,10 +3147,16 @@ bool llvm::isSafeToSpeculativelyExecute(const Value *V,
   case Instruction::Switch:
   case Instruction::Unreachable:
   case Instruction::Fence:
-  case Instruction::LandingPad:
   case Instruction::AtomicRMW:
   case Instruction::AtomicCmpXchg:
+  case Instruction::LandingPad:
   case Instruction::Resume:
+  case Instruction::CatchPad:
+  case Instruction::CatchEndPad:
+  case Instruction::CatchRet:
+  case Instruction::CleanupPad:
+  case Instruction::CleanupRet:
+  case Instruction::TerminatePad:
     return false; // Misc instructions which have effects
   }
 }