Firefox will be happy to make use of this. They've always run into LTO limitations, especially with the address space of a 32bit MSVC. Maybe with this in place

Firefox will be happy to make use of this. They've always run into LTO limitations, especially with the address space of a 32bit MSVC. Maybe with this in place and Clang's CL.exe emulator frontend, they could use it for Windows builds as well, though I suppose there are some blockers like MSVC having the best win32 codegen and them wanting to leverage that. At the very least this should allow more Linux distros to build with LTO.