//===----------------------------------------------------------------------===// // 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/
Alexey Samsonov
authored
-fsanitize=shift is now a group that includes both these checks, so exisiting users should not be affected. This change introduces two new UBSan kinds that sanitize only left-hand side and right-hand side of shift operation. In practice, invalid exponent value (negative or too large) tends to cause more portability problems, including inconsistencies between different compilers, crashes and inadequeate results on non-x86 architectures etc. That is, -fsanitize=shift-exponent failures should generally be addressed first. As a bonus, this change simplifies CodeGen implementation for emitting left shift (separate checks for base and exponent are now merged by the existing generic logic in EmitCheck()), and LLVM IR for these checks (the number of basic blocks is reduced). git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@231150 91177308-0d34-0410-b5e6-96231b3b80d8