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
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
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
Doing otherwise leads to crashing. Way to reproduce: open "gmock/gmock.h" in
the LLVM source tree.
Reviewed By: kadircet
Differential Revision: https://reviews.llvm.org/D112608
This is a temporary hack to disable diagnostics for system headers. As of right
now, IncludeCleaner does not handle the Standard Library correctly and will
report most system headers as unused because very few symbols are defined in
top-level system headers. This will eventually be fixed, but for now we are
aiming for the most conservative approach with as little false-positive
warnings as possible. After the initial prototype and core functionality is
polished, I will turn back to handling the Standard Library as it requires
custom logic.
Reviewed By: sammccall
Differential Revision: https://reviews.llvm.org/D112571
Collect the macro definition locations for all the macros used in the main
file.
Reviewed By: sammccall
Differential Revision: https://reviews.llvm.org/D112447
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
Kirill Bobyrev