My (very limited) understanding is that Roslyn is a lot more like clang than llvm. From comment on Eric Lippert's blog: * So, is this like LLVM for the CTS/CL

My (very limited) understanding is that Roslyn is a lot more like clang than llvm. From comment on Eric Lippert's blog: * So, is this like LLVM for the CTS/CLR? Absolutely not. Low-Level Virtual Machine (LLVM) is a tool that takes code in an intermediate form from the semantic analysis of a compiler, optimizes that intermediate form, and then emits optimized machine code. Roslyn takes in C# and VB source code and produces a lexical, syntactic and semantic analysis of it for you, and then emits the code in an intermediate form. The thing in .NET that most closely resembles LLVM is the jitter. http://blogs.msdn.com/b/ericlippert/archive/2011/10/19/the-roslyn-preview-is-now-available.aspx http://blogs.msdn.com/b/ericlippert/archive/2011/10/19/the-r... Update - A more full response here: http://blogs.msdn.com/b/ericlippert/archive/2011/11/18/why-il.aspx http://blogs.msdn.com/b/ericlippert/archive/2011/11/18/why-i...