https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64265
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Seems there are more such spots that insert stmts at gsi_after_labels of single_succ of entry block - e.g. ipa-split.c, omp-low.c, tree-inline.c, tree-into-ssa.c, tree-profile.c, tree-ssa-reassoc.c at least. I'll take care of tsan.c.
