jrtc27 wrote: > > lr/sc builtins are extremely fragile: there's no reasonable way for the > > compiler to guarantee that the sc is placed in such a way that it will > > eventually succeed. > > I think the user should have enough knowledges about lr/sc to make the logic > reasonable.
It's not about knowledge, it's that they are basically impossible for the compiler to actually guarantee they'll work at all. > If we don't provide these intrinsics, the user who wants to implement custom > locks will use inline assemly instead. Good, because other than using C11-style atomics (or Itanium-style __sync builtins), that's the right thing to do. https://github.com/llvm/llvm-project/pull/94578 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
