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Showing content from https://github.com/xen2/SharpLang below:

xen2/SharpLang: Compiles .NET/C# to native code using LLVM framework. No longer active, consider migrating to https://github.com/dotnet/corert

This project is no longer active, consider migrating to https://github.com/dotnet/corert

SharpLang is a .NET (MSIL) compiler front-end for LLVM.

It allows you to compile C# and other .NET languages code to any supported LLVM backend.

Official twitter account: https://twitter.com/SharpLangDev

BSD 2-clause license.

Getting Started

• Fill the gap between managed flexibility/safety/productivity (on by default) and native speed/control (when you actually need it)
• Supports many platforms (including Windows, MacOSX, mobile devices, consoles, browser)
• Performance oriented
• Lightweight runtime
• Some .NET features that implies too much overhead for to their actual uses will be emulated or dropped (i.e. array covariance -- unsafe and huge performance implication)
• Various technical choices to avoid unecessary conversions and interop with other languages
• Provide a good starting point to implement "M#" features as soon as possible (http://joeduffyblog.com/2013/12/27/csharp-for-systems-programming/)
• Flexible and controllable (.NET shouldn't be a black box anymore; optimize what you want, pay for what you actually use, etc...)

It's still a early work in progress. Any help/feedback is welcome!

• Codegen (unit tested)
• Supports most .NET opcodes
• Branching
• Classes and interfaces
• Generics (expanded like C++ template)
• PInvoke (simple, no marshalling)
• Delegate (no multicast delegate yet)
• Boxing
• Exceptions (DWARF and SEH)
• Converts huge libraries (i.e. Mono mscorlib, System, System.Core, System.Xml, etc...)
• Reflection (only types, no method/field yet)
• x86 and x64
• Simple code linked against SharpLang-compiled Mono mscorlib is starting to work (i.e. WinForms+SharpDX)

• Driver/Linker
• Runtime (probably lot will be imported from CoreCLR)
• Reflection (method, fields, custom attributes)
• Threads, Locks, etc...
• I/O
• Marshalling
• Vararg
• GC integration (either CoreCLR, Mono or BoehmGC)
• Cross-platform
• Emscripten HTML5 (javascript) support
• Linux/MacOSX support
• Android, iOS
• Code quality
• Documentation

• Dynamic loading
• Performance extensions
• Non-nullable types
• SIMD support
• More control over class/struct layouting (allocate class on stack, etc...)
• Various "M#" improvements
• Uniqueness and Reference Immutability for Safe Parallelism: http://research.microsoft.com/pubs/170528/msr-tr-2012-79.pdf
• Lifetime control (unique/owned pointers, stack alloc as much as possible with pure functions, etc...)
• RAII (struct destructors)
• Use and extend Roslyn for new language extensions
• Direct (or at least easy) access to C++ (probably with help of libclang)
• Other platforms

Here for now, until later moved to a more specific documentation.

• UTF8 string (UTF16 was choosed mainly because of Windows API, but UTF8 is more space efficient, API compatible with char* and avoid many conversions)
• String/Array indirection to more easily carve substring/subarrays.

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