In the response of Paolo I also don't understand how the DI pseudo could be
mapped on two consecutive SI regs. I think gcc always will map a multiword
pseudo on consecutive word-size regs. Am I wrong here ?
Oops, I forgot a part. In the RTL description don't write
[(set (match_operand:DI 0 "register_operand")
(unspec [...] SUPER_LD32))]
but
[(set (subreg:SI (match_operand:DI 0 "register_operand") 0)
(unspec [...] SUPER_LD32_LO))
(set (subreg:SI (match_operand:DI 0 "register_operand") 4)
(unspec [...] SUPER_LD32_HI))]
Paolo
