ROSE is an open source compiler infrastructure to build source-to-source program transformation and analysis tools for large-scale Fortran 77/95/2003, C, C++, OpenMP, and UPC applications. The intended users of ROSE could be either experienced compiler researchers or library and tool developers who may have minimal compiler experience. ROSE is particularly well suited for building custom tools for static analysis, program optimization, arbitrary program transformation, domain-specific optimizations, complex loop optimizations, performance analysis, and cyber-security.
ROSE is not grep, sed, LLVM, or a Perl script. A ROSE Tool uses the ROSE compiler-based infrastructure to parse code into a complete Abstract Syntax Tree (AST). The AST contains all the syntax and semantic information in the original code, and has a rich API supporting sophisticated analysis and transformations. The ROSE Tool queries the AST and reports on and/or changes the AST, then may emit new code from the AST. All ROSE Tools can thus precisely replicate the parsing and semantic analysis behavior of multiple compiler languages, vendors, and versions. New ROSE Tools can quickly be created by customers or by the ROSE Team. ROSE is open-source, and is portable across a large and expanding range of platforms. ROSE Tools can process large code bases, and the ROSE infrastructure and ROSE Tool collection are continuously upgraded and extended by the LLNL ROSE Team and outside contributors.