forked from OSchip/llvm-project
0db402c5b4
llvm::errs() is unbuffered. On a POSIX platform, composing a diagnostic string may invoke the ::write syscall multiple times, which can be slow. Buffer writes to a temporary SmallString when composing a single diagnostic to reduce the number of ::write syscalls to one (also easier to read under strace/truss). For an invocation of ld.lld with 62000+ lines of `ld.lld: warning: symbol ordering file: no such symbol: ` warnings (D87121), the buffering decreases the write time from 1s to 0.4s (for /dev/tty) and from 0.4s to 0.1s (for a tmpfs file). This can speed up `relocation R_X86_64_PC32 out of range` diagnostic printing as well with `--noinhibit-exec --no-fatal-warnings`. Reviewed By: jhenderson Differential Revision: https://reviews.llvm.org/D87272 |
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| benchmarks | ||
| bindings | ||
| cmake | ||
| docs | ||
| examples | ||
| include | ||
| lib | ||
| projects | ||
| resources | ||
| runtimes | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| .clang-format | ||
| .clang-tidy | ||
| .gitattributes | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| CREDITS.TXT | ||
| LICENSE.TXT | ||
| README.txt | ||
| RELEASE_TESTERS.TXT | ||
| configure | ||
| llvm.spec.in | ||
README.txt
The LLVM Compiler Infrastructure ================================ This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments. LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt. Please see the documentation provided in docs/ for further assistance with LLVM, and in particular docs/GettingStarted.rst for getting started with LLVM and docs/README.txt for an overview of LLVM's documentation setup. If you are writing a package for LLVM, see docs/Packaging.rst for our suggestions.