michael-kenzel wrote: > I would assume this is already transformed to memcpy but I guess it won't be > for -O0
[I did some testing on this](https://godbolt.org/z/YMEjbxYd9): it seems that gcc replaces the `strcpy` with a simple `mov` even under `-O0`, but not the `memcpy`. clang does the reverse: it replaces the `memcpy` with a `mov` even under `-O0` but not the `strcpy`. So it's a bit of a wash (I didn't expect either compiler to transform any of these with `-O0` tbqh). Though since libunwind is primarily meant to be used with LLVM, this change arguably presents the tiniest codegen improvement. On either compiler, turning on optimizations (even just to `-O1`) results in the exact same codegen from either version (as one would expect). https://github.com/llvm/llvm-project/pull/72043 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
