https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105459
--- Comment #11 from Kewen Lin <linkw at gcc dot gnu.org> --- (In reply to Kewen Lin from comment #9) > inline_call will force reload global optimization. > > /* Reload global optimization flags. */ > if (reload_optimization_node && DECL_STRUCT_FUNCTION (to->decl) == cfun) > set_cfun (cfun, true); > > It looks that ix86_set_current_function can create one new target option > node even if fndecl == ix86_previous_fndecl but > flag_unsafe_math_optimizations (or flag_excess_precision) != the > corresponding values in the associated target node. We can't do this during the target hook ix86_set_current_function since at that time (WPA phase) the cfun is NULL, even if we want to update the target option node for to->decl, but the passed down fndecl is NULL. I made a patch to rebuild the target option node for to->decl DECL once reload_optimization_node is true. For this failure case, the opts.x_flag_unsafe_math_optimizations has changed, we have to sync it to x_ix86_unsafe_math_optimizations and rebuild.
