On Mon, Aug 14, 2017 at 10:44 AM, Tristan Bourvon <tbour...@mozilla.com> wrote:
> Here's the RFC of the overflow builtins: > http://clang-developers.42468.n3.nabble.com/RFC-Introduce- > overflow-builtins-td3838320.html > Along with the tracking issue: https://bugs.llvm.org/show_bug.cgi?id=12290 > And the patch: > https://github.com/llvm-mirror/clang/commit/98d1ec1e99625176626b0bcd44cef7 > df6e89b289 > > There's also another patch that was added on top of this one which adds > more overflow builtins: > https://github.com/llvm-mirror/clang/commit/c41c63fbf84cc904580e733d1123d3 > b03bb5584c > > It seems clear that this optimization could bring big performance > improvements on hot functions. It could also reduce binary size > substantially (we're talking about 14->5 instructions in their case). > Do we have a bug filed to investigate these overflow builtins? Should we file one? Even if we can't use them on all platforms yet, it might be a nice win on mac where we lack other optimizations like PGO right now. Thanks. Ben _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
