[VFS] Avoid <stack> include (NFC)

Directly use a vector instead of wrapping it in a stack, like we
do in most places.

1 files changed, 8 insertions, 7 deletions

diff --git a/llvm/lib/Support/VirtualFileSystem.cpp b/llvm/lib/Support/VirtualFileSystem.cpp
index f9c15bf..ce2bf2b 100644
--- a/llvm/lib/Support/VirtualFileSystem.cpp
+++ b/llvm/lib/Support/VirtualFileSystem.cpp
@@ -2913,30 +2913,31 @@ vfs::recursive_directory_iterator::recursive_directory_iterator(
   directory_iterator I = FS->dir_begin(Path, EC);
   if (I != directory_iterator()) {
     State = std::make_shared<detail::RecDirIterState>();
-    State->Stack.push(I);
+    State->Stack.push_back(I);
   }
 }
 
 vfs::recursive_directory_iterator &
 recursive_directory_iterator::increment(std::error_code &EC) {
   assert(FS && State && !State->Stack.empty() && "incrementing past end");
-  assert(!State->Stack.top()->path().empty() && "non-canonical end iterator");
+  assert(!State->Stack.back()->path().empty() && "non-canonical end iterator");
   vfs::directory_iterator End;
 
   if (State->HasNoPushRequest)
     State->HasNoPushRequest = false;
   else {
-    if (State->Stack.top()->type() == sys::fs::file_type::directory_file) {
-      vfs::directory_iterator I = FS->dir_begin(State->Stack.top()->path(), EC);
+    if (State->Stack.back()->type() == sys::fs::file_type::directory_file) {
+      vfs::directory_iterator I =
+          FS->dir_begin(State->Stack.back()->path(), EC);
       if (I != End) {
-        State->Stack.push(I);
+        State->Stack.push_back(I);
         return *this;
       }
     }
   }
 
-  while (!State->Stack.empty() && State->Stack.top().increment(EC) == End)
-    State->Stack.pop();
+  while (!State->Stack.empty() && State->Stack.back().increment(EC) == End)
+    State->Stack.pop_back();
 
   if (State->Stack.empty())
     State.reset(); // end iterator