[WinEH] Allow CatchHigh to be equal to TryHigh

Catch blocks which are empty may be in the same state as their try
blocks.  It is not meaningful to give the catch block its own state
number in this case because it can't do anything exceptional.

llvm-svn: 235212

llvm/lib/CodeGen/AsmPrinter/Win64Exception.cpp

@@ -437,7 +437,7 @@ void Win64Exception::emitCXXFrameHandler3Table(const MachineFunction *MF) {
             std::max(CatchHigh, FuncInfo.CatchHandlerMaxState[HT.Handler]);
 
       assert(TBME.TryLow <= TBME.TryHigh);
-      assert(CatchHigh > TBME.TryHigh);
+      assert(CatchHigh >= TBME.TryHigh);
       OS.EmitIntValue(TBME.TryLow, 4);                    // TryLow
       OS.EmitIntValue(TBME.TryHigh, 4);                   // TryHigh
       OS.EmitIntValue(CatchHigh, 4);                      // CatchHigh