https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69454
--- Comment #18 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to H.J. Lu from comment #17) > > Do you have a testcase to show that you need to realign stack for STV? You can keep track alignment requirement in STV and replace /* Conversion means we may have 128bit register spills/fills which require aligned stack. */ if (converted_insns) { if (crtl->stack_alignment_needed < 128) crtl->stack_alignment_needed = 128; if (crtl->stack_alignment_estimated < 128) crtl->stack_alignment_estimated = 128; } with an assert.