forked from OSchip/llvm-project
4000c9ee18
Measure amount of high-level or fixed-cost operations performed during building/loading modules and during header search. High-level operations like building a module or processing a .pcm file are motivated by previous issues where clang was re-building modules or re-reading .pcm files unnecessarily. Fixed-cost operations like `stat` calls are tracked because clang cannot change how long each operation takes but it can perform fewer of such operations to improve the compile time. Also tracking such stats over time can help us detect compile-time regressions. Added stats are more stable than the actual measured compilation time, so expect the detected regressions to be less noisy. On relanding drop stats in MemoryBuffer.cpp as their value is pretty low but affects a lot of clients and many of those aren't interested in modules and header search. rdar://problem/55715134 Reviewed By: aprantl, bruno Differential Revision: https://reviews.llvm.org/D86895 |
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| INPUTS | ||
| bindings | ||
| cmake | ||
| docs | ||
| examples | ||
| include | ||
| lib | ||
| runtime | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| www | ||
| .clang-format | ||
| .clang-tidy | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| INSTALL.txt | ||
| LICENSE.TXT | ||
| ModuleInfo.txt | ||
| NOTES.txt | ||
| README.txt | ||
README.txt
//===----------------------------------------------------------------------===// // C Language Family Front-end //===----------------------------------------------------------------------===// Welcome to Clang. This is a compiler front-end for the C family of languages (C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM compiler infrastructure project. Unlike many other compiler frontends, Clang is useful for a number of things beyond just compiling code: we intend for Clang to be host to a number of different source-level tools. One example of this is the Clang Static Analyzer. If you're interested in more (including how to build Clang) it is best to read the relevant web sites. Here are some pointers: Information on Clang: http://clang.llvm.org/ Building and using Clang: http://clang.llvm.org/get_started.html Clang Static Analyzer: http://clang-analyzer.llvm.org/ Information on the LLVM project: http://llvm.org/ If you have questions or comments about Clang, a great place to discuss them is on the Clang development mailing list: http://lists.llvm.org/mailman/listinfo/cfe-dev If you find a bug in Clang, please file it in the LLVM bug tracker: http://llvm.org/bugs/