https://gcc.gnu.org/bugzilla/show_bug.cgi?id=55212
--- Comment #200 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> --- (In reply to Kazumoto Kojima from comment #199) > Created attachment 59000 [details] > a patch for an experiment > > I added explicit register clobbers after all s-function calls as an > experiment, although it is not the right way to fix the issue. OK, I'll add that patch and retest.