forked from OSchip/llvm-project
9551d3bad9
Before this patch the linkage cache was only used by the entry level function (getLinkage). The function that does the actual computation (getLVForDecl), never looked at it. This means that we would not reuse an entry in the cache when getLVForDecl did a recursive call. This patch fixes that by adding another computation enum value for when we don't care about the linkage at all and having getLVForDecl check the cache in that case. When running "clang -cc1" over SemaExpr.ii this brings the number of linkage computations from 93749 to 58426. When running "clang -cc1 -emit-llvm -O3" it goes from 198708 to 161444. For SemaExpr.ii at least linkage computation is a small enough percentage of the work that the time difference was in the noise. When asserts are enabled this patch also causes clang to check the linkage cache even on recursive calls. llvm-svn: 182799 |
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| 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.cs.uiuc.edu/mailman/listinfo/cfe-dev If you find a bug in Clang, please file it in the LLVM bug tracker: http://llvm.org/bugs/