MaskRay added a comment. In D101873#2804669 <https://reviews.llvm.org/D101873#2804669>, @lanza wrote:
> Hey Fangrui, is there any reason this couldn't extend to armv7? @lanza Always happy when more folks are interested in such kind of stuff:) This needs backend work. See D101872 <https://reviews.llvm.org/D101872>. I don't have bandwidth working on 32-bit arm :) Now that we don't optimize variables, the value of -fno-semantic-interposition is small. -fno-semantic-interposition can save a PLT entry (and associated `R_*_JUMP_SLOT` dynamic relocation) if a default visibility STB_GLOBAL function is only called in its defining TU, not by other TUs linked into the shared object. Its benefit is subsumed by ld -Bsymbolic-non-weak-functions (seems that binutils isn't enthusiastic https://sourceware.org/pipermail/binutils/2021-May/116753.html) I asked whether GCC could provide a configure option defaulting -fno-semantic-interposition https://gcc.gnu.org/PR100937 and I even sent a patch. Oops it was immediately closed as a wontfix. It is so unfortunate that so few people pay attention on performance. If I still want to try something, my angle has to be ***security hardening** : https://gcc.gnu.org/pipermail/gcc-patches/2021-June/572103.html Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D101873/new/ https://reviews.llvm.org/D101873 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
