regopt             67 src/cmd/5c/reg.c regopt(Prog *p)
regopt            135 src/cmd/5g/reg.c regopt(Prog *firstp)
regopt             66 src/cmd/6c/reg.c regopt(Prog *p)
regopt            120 src/cmd/6g/reg.c regopt(Prog *firstp)
regopt             66 src/cmd/8c/reg.c regopt(Prog *p)
regopt             90 src/cmd/8g/reg.c regopt(Prog *firstp)