================
@@ -4772,6 +4772,23 @@ bool
ASTWriter::PreparePathForOutput(SmallVectorImpl<char> &Path) {
Changed = true;
}
+ // If we are generating a normal PCH (EG. not a C++ module).
+ if (!WritingModule) {
+ // Use the vfs overlay if it exists to translate paths.
+ auto &FileSys =
+ Context->getSourceManager().getFileManager().getVirtualFileSystem();
+
+ if (auto *RFS = dyn_cast<llvm::vfs::RedirectingFileSystem>(&FileSys)) {
----------------
jansvoboda11 wrote:
`getRealPath()` gets very expensive if it ever hits the actual FS. Agreed that
looking through the abstraction is not ideal.
https://github.com/llvm/llvm-project/pull/106577
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