Commit Graph

15 Commits

Author SHA1 Message Date
Kirill Bobyrev 012e90bb24
Reland "[clangd] IncludeCleaner: Add support for IWYU pragma private"
This lands 4cb38bfe76 again.
2022-04-05 16:57:39 +02:00
Kirill Bobyrev f43c4c5be2 Revert "[clangd] IncludeCleaner: Add support for IWYU pragma private"
This reverts commit 4cb38bfe76.

Awkwardly enough, this builds Windows buildbots:

http://45.33.8.238/win/55402/step_9.txt

It is yet unclear why this is happening but I will need more time to
diagnose the issue.
2022-03-31 17:59:52 +02:00
Kirill Bobyrev 4cb38bfe76
[clangd] IncludeCleaner: Add support for IWYU pragma private
Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D120306
2022-03-31 12:49:52 +02:00
Kirill Bobyrev d5106c8f97
[clangd] NFC: Cleanup IncludeCleaner API
Make a further improvement to decrease verbosity of the API: ASTContext
provides SourceManager access.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D119842
2022-03-08 13:43:25 +01:00
Kirill Bobyrev 46a6f5ae14 [clangd] NFC: Move stdlib headers handling to Clang
This will allow moving the IncludeCleaner library essentials to Clang
and decoupling them from the majority of clangd.

The patch itself just moves the code, it doesn't change existing
functionality.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D119130
2022-02-09 11:05:39 +01:00
Kirill Bobyrev 089d9c50b2
[clangd] IncludeCleaner: Decrease API dependency on clangd
Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D118882
2022-02-03 14:40:53 +01:00
Sam McCall 478863ef58 [clangd] Basic IncludeCleaner support for c/c++ standard library
There are some limitations here, so this is behind a flag for now (in addition
to the config setting for the overall feature).

- symbols without exactly one associated header aren't handled right
- no macro support
- referencing std::size_t usually doesn't leave any trace in the AST that the
  alias in std was used, so we associate with stddef.h instead of cstddef.
  (An AST issue not specific to stdlib, but much worse there)

Differential Revision: https://reviews.llvm.org/D114077
2022-01-03 18:19:56 +01:00
Christian Kühnel 5bd643d31d [clangd] cleanup of header guard names
Renaming header guards to match the LLVM convention.
This patch was created by automatically applying the fixes from
clang-tidy.

I've removed the [NFC]  tag from the title, as we're adding header guards in some files and thus might trigger behavior changes.

Differential Revision: https://reviews.llvm.org/D113896
2021-12-02 15:58:35 +00:00
Kirill Bobyrev 34cc210aa8
[clangd] IncludeCleaner: Attribute symbols from non self-contained headers to their parents
When a symbol comes from the non self-contained header, we recursively uplift
the file we consider used to the first includer that has a header guard. We
need to do this while we still have FileIDs because every time a non
self-contained header is included, it gets a new FileID but is later
deduplicated by HeaderID and it's not possible to understand where it was
included from.

Based on D114370.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D114623
2021-11-26 16:20:48 +01:00
Kirill Bobyrev f47564ea87
[clangd] IncludeCleaner: Skip non self-contained headers
Headers without include guards might have side effects or can be the files we
don't want to consider (e.g. tablegen ".inc" files). Skip them when translating
headers to the HeaderIDs that we will consider as unused.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D112695
2021-10-29 17:57:31 +02:00
Sam McCall 73453e7ade [clangd] Avoid expensive checks of buffer names in IncludeCleaner
This changes the handling of special buffers (<command-line> etc) that
SourceManager treats as files but FileManager does not.

We now include them in findReferencedFiles() and drop them as part of
translateToHeaderIDs(). This pairs more naturally with the data representations
we're using, and so avoids a bunch of converting between representations for
filtering.

Differential Revision: https://reviews.llvm.org/D112652
2021-10-28 08:00:57 +02:00
Kirill Bobyrev e3c6090e59 [clangd] IncludeCleaner: Support macros
Collect the macro definition locations for all the macros used in the main
file.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D112447
2021-10-27 10:30:04 +02:00
Kirill Bobyrev 6d314ee570
[clangd] Add a way to enable IncludeCleaner through config
This is useful for dogfooding the feature and spotting bugs.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D111870
2021-10-26 12:53:05 +02:00
Kirill Bobyrev ebfcd06d42 [clangd] IncludeCleaner: Mark used headers
Follow-up on D105426.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D108194
2021-10-05 18:08:24 +02:00
Kirill Bobyrev d1ec581ebf
[clangd] IncludeCleaner as a library: Find all references to symbols in the file
This is the first patch in an ongoing attempt of Include Cleaner: unused/missing
headere diagnostics, an IWYU-like functionality implementation for clangd. The
work is split into (mostly) distinct and parallelizable pieces:

- Finding all referenced locations (this patch).
- Finding all referenced locations of macros.
- Building IncludeGraph and marking headers as unused, used and directly used.
- Making use of the introduced library and add an option to use in clangd.

---

* Adding support for standard library headers (possibly through mapping
  genfiles).

Based on https://reviews.llvm.org/D100540.

Reviewed By: sammccall

Differential Revision: https://reviews.llvm.org/D105426
2021-08-18 10:08:35 +02:00