https://gcc.gnu.org/bugzilla/show_bug.cgi?id=105325
--- Comment #8 from Martin Liška <marxin at gcc dot gnu.org> --- The problematic instructions is: lwa 9,40036(1) Diff in between power9 and power10: diff -u good.s bad.s --- good.s 2022-04-21 13:01:23.844042178 +0200 +++ bad.s 2022-04-21 13:01:28.544026646 +0200 @@ -1,5 +1,5 @@ .file "extmain.cpp.ii" - .machine power9 + .machine power10 .abiversion 2 .section ".text" .section ".toc","aw" ... .LCFI0: ld 9,.LC0@toc(2) + ld 10,0(9) + pstd 10,40040(1) li 10,0 - ori 10,10,0x9c68 - add 10,10,1 - ld 8,0(9) - std 8,0(10) - li 8,0 - li 9,0 - ori 9,9,0x9c64 - lwzx 9,9,1 - cmpwi 0,9,0 + lwa 9,40036(1) + cmpdi 0,9,0 beq 0,.L1 .L3: ...