Matt Godbolt has announced today that the Visual C++ compiler is finally available on Compiler Explorer (https://godbolt.org/). Compiler Explorer is a website where you can write C/C++/Rust/Go/D code, compile it with various compilers and settings and see the resulted assembly code.

The version available is 1910, i.e. VC++ 2017 RTM (the exact version number is 19.10.25017.0). The following targets are available:

  • x86: x86 CL 19 2017 RTW
  • x64: x86-64 CL 19 2017 RTW
  • ARM: ARM CL 19 2017 RTW

To give it a try, I compiled the following program:

The result may look at little bit surprizing, as it totals over 5000 lines of assembly code, as oposed to gcc 7 or clang 4 that only produce 42.

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