[Bug rtl-optimization/104985] [12 Regression] ICE: SIGSEGV in undo_to_marker / adjust_reg_mode with -Os -frounding-math since r12-4767-g81342e95827f77

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104985

--- Comment #12 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think once gen_reg_rtx is called, we no longer overwrite regno_reg_rtx[regno]
but just modify it in place to change mode (except that we throw it away at the
end of RTL passes for each function), so I think all 3 patches should be safe.