https://gcc.gnu.org/bugzilla/show_bug.cgi?id=111937
--- Comment #2 from Xiao Ma <mxlol233 at outlook dot com> --- (In reply to Thomas Schwinge from comment #1) > Created attachment 56178 [details] > 0001-WIP-STATIC_ASSERT-MAX_MACHINE_MODE-256.patch > > (In reply to Xiao Ma from comment #0) > I'm not sure about your initial analysis; I'm not familiar with the > code/changes you cite. > > However, please try building with the attached > '0001-WIP-STATIC_ASSERT-MAX_MACHINE_MODE-256.patch'. If that triggers, > we've (likely...) found (one of) your issue(s). Thanks for your advice, I will check this out, and attach a patch to show how to reproduce it, under the upstream gcc.