forked from OSchip/llvm-project
330c0b6c8c
Rehashing the ExplodedNode table is very expensive. The hashing itself is expensive, and the general activity of iterating over the hash table is highly cache unfriendly. Instead, we guess at the eventual size by using the maximum number of steps allowed. This generally avoids a rehash. It is possible that we still need to rehash if the backlog of work that is added to the worklist significantly exceeds the number of work items that we process. Even if we do need to rehash in that scenario, this change is still a win, as we still have fewer rehashes that we would have prior to this change. For small work loads, this will increase the memory used. For large work loads, it will somewhat reduce the memory used. Speed is significantly increased. A large .C file took 3m53.812s to analyze prior to this change. Now it takes 3m38.976s, for a ~6% improvement. http://reviews.llvm.org/D20933 llvm-svn: 272394 |
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| INPUTS | ||
| bindings | ||
| cmake | ||
| docs | ||
| examples | ||
| include | ||
| lib | ||
| runtime | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| www | ||
| .arcconfig | ||
| .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/