troyj added a comment. > Also, it would be nice to have some numbers for the 'measurably faster' claim > :)
Sure. Here's an example of a library change that started using builtins for `__make_integer_seq` and `__type_pack_element` https://github.com/facebook/fatal/commit/58102a3f7e66ad122d7d3335c446399b09d5085e where there was a 1.8% speedup for a file that spent 70 seconds in the front end. It also reduced the peak memory usage of the front end by 0.5%. We have reason to believe that a `__decay` builtin would produce similar benefit. Unfortunately, all of the intrinsics in https://reviews.llvm.org/D116203 were implemented with parentheses syntax instead of as builtin templates, which makes it more difficult. Ideally, we'd like to see all of these implemented as builtin templates, but `__decay` is the first one that we're proposing. I'm not familiar with the mangling issue that you mentioned. I'll look into it more. Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D137458/new/ https://reviews.llvm.org/D137458 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
