It would be sad to see us standardize on a clang monoculture.
On Tue, May 1, 2018 at 7:56 PM, Anthony Jones <ajo...@mozilla.com> wrote: > You may already know that the Low-Level Tools team support important tools > and code infrastructure. Lately we’ve also been improving our rustc/clang > (LLVM) story and I’d like bring everyone up to date. > > > There are a lot of important and interesting things going on: > > > Michael Woerister and Nathan Froyd recently (mid-March) enabled Rust > incremental compilation for Firefox developers > > Michael is experimenting with cross language inlining (rustc/clang) using > LTO > > Preliminary results show compiling LLVM with clang and using LTO on rustc > improves stylo compilation time by around 15% > > LTO requires more work to support Firefox > > Nick Nethercote has started speeding up rustc and has already had a number > of wins > > David Major has got Windows clang builds working with green tests > > LTO is still buggy (but works well enough to run benchmarks) and PGO won’t > run on Windows > > Win32 - clang with LTO w/o PGO is marginally faster than MSVC with LTO/PGO > > Win64 - clang with LTO w/o PGO is ~5-10% slower than MSVC with LTO/PGO > > Windows users can build locally with clang > > Mike Hommey is tracking improvements and regressions in the Rust compiler > (performance regression, crash reporting and more crash reporting) > > Tom Tromey is continuing to work on first class Rust support in GDB and LLDB > > > Ultimately, I’d like to see us standardise on clang on all platforms because > it makes Rust/C++ integration better as well as making things simpler for > developers and build system maintainers. We’ll get more done if we make our > own lives simpler. > > > I have some specific requests: > > > Let me know if you have specific Firefox cases where Rust is slowing you > down > > Cross language inlining is coming - avoid duplication between Rust and C++ > > Start doing your developer builds with clang > > Anthony > > > > _______________________________________________ > dev-platform mailing list > dev-platform@lists.mozilla.org > https://lists.mozilla.org/listinfo/dev-platform > _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
