================
@@ -701,6 +701,10 @@ class SourceManager : public RefCountedBase<SourceManager>
{
/// use (-ID - 2).
SmallVector<SrcMgr::SLocEntry, 0> LoadedSLocEntryTable;
+ /// For each allocation in LoadedSLocEntryTable, we keep the new size. This
+ /// can be used to determine whether two FileIDs come from the same AST file.
+ SmallVector<size_t, 0> LoadedSLocEntryTableSegments;
----------------
jansvoboda11 wrote:
Or this?
```c++
SmallVector<FileID, 0> LoadedSLocEntryTableSegments{
FileID(-1), // represents FileIDs from -10 to -2
FileID(-10), // represents FileIDs from -50 to -11
FileID(-50)}; // represents FileIDs from -90 to -51
llvm::upper_bound(llvm::reverse(LoadedSLocEntryTableSegments), FID);
```
The stored `FileIDs` have pretty weird values, though...
https://github.com/llvm/llvm-project/pull/66962
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