================
@@ -141,6 +141,22 @@ std::vector<bool> HeaderSearch::computeUserEntryUsage()
const {
return UserEntryUsage;
}
+std::vector<bool> HeaderSearch::computeVFSUsageAndClear() const {
+ std::vector<bool> VFSUsage;
+ llvm::vfs::FileSystem &RootFS = FileMgr.getVirtualFileSystem();
+ // TODO: This only works if the `RedirectingFileSystem`s were all created by
+ // `createVFSFromOverlayFiles`.
+ RootFS.visit([&](llvm::vfs::FileSystem &FS) {
+ if (auto *RFS = dyn_cast<llvm::vfs::RedirectingFileSystem>(&FS)) {
+ VFSUsage.push_back(RFS->hasBeenUsed());
+ RFS->clearHasBeenUsed();
+ }
+ });
+ // VFS visit order is the opposite of VFSOverlayFiles order.
+ std::reverse(VFSUsage.begin(), VFSUsage.end());
+ return VFSUsage;
----------------
jansvoboda11 wrote:
Might be worth asserting that size of `VFSUsage` is the same as the size of
`HeaderSearchOptions::VFSOverlayFiles`.
https://github.com/llvm/llvm-project/pull/73734
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