Identified with misc-include-cleaner.

In preparation for removing the `#include "llvm/ADT/StringExtras.h"`
from the header to source file of `llvm/Support/Error.h`, first add in
all the missing includes that were previously included transitively
through this header.

Discourse thread: https://discourse.llvm.org/t/include-what-you-use-include-cleanup
Differential Revision: https://reviews.llvm.org/D121332

Most PDB fields on disk are 32-bit but describe the file in terms of MSF
blocks, which are 4 kiB by default.

So PDB files can be a bit larger than 4 GiB, and much larger if you create them
with a block size > 4 kiB.

This is a first (necessary, but by far not not sufficient) step towards
supporting such PDB files.  Now we don't truncate in-memory file offsets (which
are in terms of bytes, not in terms of blocks).

No effective behavior change. lld-link will still error out if it were to
produce PDBs > 4 GiB.

Differential Revision: https://reviews.llvm.org/D109923

The build failed with

  error: call to deleted constructor of 'llvm::Error'

errors.

This reverts commit 1c2241a7936bf85aa68aef94bd40c3ba77d8ddf2.

This is how it should've been and brings it more in line with
std::string_view. There should be no functional change here.

This is mostly mechanical from a custom clang-tidy check, with a lot of
manual fixups. It uncovers a lot of minor inefficiencies.

This doesn't actually modify StringRef yet, I'll do that in a follow-up.

Currently injected-sources-native.test fails with "Expected<T>
value was in success state.
(Note: Expected<T> values in success mode must still be checked
prior to being destroyed)"
when llvm is compiled with LLVM_ENABLE_ABI_BREAKING_CHECKS in Release.

The problem is that getStringForID returns Expected<StringRef>
and Expected value must always be checked, even if it is in success state.
Checking with assert only helps in Debug and is wrong.

Differential revision: https://reviews.llvm.org/D69251

llvm-svn: 375492

Now that we've moved to C++14, we no longer need the llvm::make_unique
implementation from STLExtras.h. This patch is a mechanical replacement
of (hopefully) all the llvm::make_unique instances across the monorepo.

llvm-svn: 369013

- getCompression() used to return a PDB_SourceCompression even though
  the docs for IDiaInjectedSource are explicit about the return value
  being compiler-dependent. Return an uint32_t instead, and make the
  printing code handle unknown values better by printing "Unknown" and
  the int value instead of not printing any compression.

- Print compressed contents as hex dump, not as string.

- Add compression type "DotNet", which is used (at least) by csc.exe,
  the C# compiler. Also add a lengthy comment describing the stream
  contents (derived from looking at the raw hex contents long enough
  to see the GUIDs, which led me to the roslyn and mono implementations
  for handling this).

- The native injected source dumper was dumping the contents of the
  whole data stream -- but csc.exe writes a stream that's padded with
  zero bytes to the next 512 boundary, and the dia api doesn't display
  those padding bytes. So make NativeInjectedSource::getCode() do the
  same thing.

Differential Revision: https://reviews.llvm.org/D64879

llvm-svn: 366386