[clang] Introduce paged vector (PR #66430)

[Giulio Eulisse via cfe-commits]

================
@@ -699,7 +700,7 @@ class SourceManager : public RefCountedBase<SourceManager> {
   ///
   /// Negative FileIDs are indexes into this table. To get from ID to an index,
   /// use (-ID - 2).
-  SmallVector<SrcMgr::SLocEntry, 0> LoadedSLocEntryTable;
+  llvm::PagedVector<SrcMgr::SLocEntry> LoadedSLocEntryTable;
----------------
ktf wrote:

That might make sense, indeed.

https://github.com/llvm/llvm-project/pull/66430