Revert the llvm::append_range change in lib/Target/X86/X86WinEHState.cpp

This reverts a single file from ad1ba15.
llvm::append_range in this context fails to compile with recent Clang and
libc++:

libcxx/include/__algorithm/copy_backward.h:221:68: error: invalid operands to
binary expression ('llvm::SuccIterator<llvm::Instruction, llvm::BasicBlock>'
and 'long')
...
llvm-project/llvm/lib/Target/X86/X86WinEHState.cpp:724:11: note: in
instantiation of function template specialization
'llvm::append_range<std::deque<llvm::BasicBlock *>,
llvm::iterator_range<llvm::SuccIterator<llvm::Instruction, llvm::BasicBlock
>>>' requested here
  724 |     llvm::append_range(Worklist, successors(BB));
      |           ^

Author: alexfh

llvm/lib/Target/X86/X86WinEHState.cpp

@@ -721,7 +721,8 @@ void WinEHStatePass::addStateStores(Function &F, WinEHFuncInfo &FuncInfo) {
     // enqueue it's successors to see if we can infer their states.
     InitialStates.insert({BB, PredState});
     FinalStates.insert({BB, PredState});
-    llvm::append_range(Worklist, successors(BB));
+    for (BasicBlock *SuccBB : successors(BB))
+       Worklist.push_back(SuccBB);
   }
 
   // Try to hoist stores from successors.