https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59813
--- Comment #11 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Is something in libstdc++ miscompiled or something in the tests? Like, can you try those tests against libstdc++ built with that change reverted, but test with gcc with that revision in? If it is in libstdc++, can you bisect to a particular *.o file (built by r271012 vs. r271013)? Is it the tree-inline.[ch] change, or the tree-tailcall.c change? For both one needs the tree-ssa-live.[ch] changes, but otherwise the changes are independent (essentially, it could be committed as the tree-ssa-live.[ch] patch, and then either nothing, or tree-inline.[ch], or tree-tailcall.c, or both).
