[Bug middle-end/125266] default_function_abi may not be the default function ABI

[hjl.tools at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125266

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
A backend may call reinit_regs:

config/gcn/gcn.cc:  reinit_regs ();
config/i386/i386-options.cc:    reinit_regs ();
config/i386/i386-options.cc:    reinit_regs ();
config/riscv/riscv.cc:  reinit_regs ();