[Bug target/65249] unable to find a register to spill in class 'R0_REGS' when compiling protobuf on sh4

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65249

--- Comment #22 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Kazumoto Kojima from comment #21)
> Before RA, during expand phase.  It's generated by function.c:
> expand_function_end with
>  emit_move_insn (crtl->return_rtx,
>                DECL_RTL (DECL_RESULT (current_function_decl))
> essentially.  In this case, crtl->return_rtx is (reg/i:DI 0 r0).

Ah, I see.  Thanks.