These tests were failing for me on windows with a very curious error:
error: argument unused during compilation: '/Zc:preprocessor'
It turns out that they were walking up the directory structure and
finding the compilation DB in my top level llvm-project directory.
Add `--` to the ends of the clang-tidy command lines so that they
don't go looking for random compilation databases. Also replace args
specified with `-extra-arg` with directly specifying them to the
FixedCompilationDatabase.
Differential Revision: https://reviews.llvm.org/D158157
Support for NOLINT(BEGIN/END) blocks (implemented in D108560) is
currently costly. This patch aims to improve the performance with the
following changes:
- The use of tokenized NOLINTs instead of a series of repetitive ad-hoc
string operations (`find()`, `split()`, `slice()`, regex matching etc).
- The caching of NOLINT(BEGIN/END) block locations. Determining these
locations each time a new diagnostic is raised is wasteful as it
requires reading and parsing the entire source file.
Move NOLINT-specific code from `ClangTidyDiagnosticConsumer` to new
purpose-built class `NoLintDirectiveHandler`.
Differential Revision: https://reviews.llvm.org/D116085
