akhuang added inline comments.
================
Comment at: llvm/lib/Support/Path.cpp:1237
RenameEC = copy_file(TmpName, Name);
setDeleteDisposition(H, true);
}
----------------
amccarth wrote:
> I'm curious if this path has ever been exercised.
>
> I see that rename_handle is implemented with MoveFileExW on Windows.
> MoveFileExW docs say it will fail if you're trying to move a _directory_ to
> another device, but that it can do copy+delete to move a _file_ to another
> device. (That might require adding MOVEFILE_COPY_ALLOWED to the flags passed
> in the MoveFileExW in lib\Support\Windows\Path.inc near line 485.)
>
> Anyway, it just seems like we're re-implementing functionality the OS calls
> can already do for us.
>
> https://docs.microsoft.com/en-us/windows/win32/api/winbase/nf-winbase-movefileexw
according to https://reviews.llvm.org/D50048 we used to pass
MOVEFILE_COPY_ALLOWED but then removed it because it calls `rename_internal`
which fails.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D102736/new/
https://reviews.llvm.org/D102736
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