https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120440
--- Comment #18 from Sam James <sjames at gcc dot gnu.org> --- Created attachment 62018 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=62018&action=edit a-except.adb (In reply to Sam James from comment #17) Well, I say that, but at least it should be reproducible in terms of seeing the dodgy difference with: $ gcc -c -O1 -march=x86-64-v2 -W -Wall -fno-PIE -gnatpg -gnata -g -fno-inline -fno-toplevel-reorder a-except.adb -o a-except.o vs $ gcc -c -O1 -march=x86-64-v3 -W -Wall -fno-PIE -gnatpg -gnata -g -fno-inline -fno-toplevel-reorder a-except.adb -o a-except.o