forked from OSchip/llvm-project
5721735025
Beginning with svn r186971, we noticed an internal test started to fail when using clang built with LTO. After much investigation, it turns out that there are no blatant bugs here, we are just running out of stack space and crashing. Preprocessor::ReadFunctionLikeMacroArgs already has one vector of 64 Tokens, and r186971 added another. When built with LTO, that function is inlined into Preprocessor::HandleMacroExpandedIdentifier, which for our internal test is invoked in a deep recursive cycle. I'm leaving the original 64 Token vector alone on the assumption that it is important for performance, but the new FixedArgTokens vector is only used on an error path, so it should be OK if it requires additional heap storage. It would be even better if we could avoid the deep recursion, but I think this change is a good thing to do regardless. <rdar://problem/14540345> llvm-svn: 187315 |
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| tools | ||
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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/