compatFlag = " -compat=" + compatVersion
		}
		if suggestUpgrade {
			eDesc := ""
			eFlag := ""
			if suggestEFlag {
				eDesc = ", leaving some packages unresolved"
				eFlag = " -e"
			}
			fmt.Fprintf(os.Stderr, "To upgrade to the versions selected by go %s%s:\n\tgo mod tidy%s -go=%s && go mod tidy%s -go=%s%s\n", compatVersion, eDesc, eFlag, compatVersion, eFlag, goVersion, compatFlag)
		} else if suggestEFlag {

	}
}

func wantReg(ctxt *obj.Link, ins *instruction, pos string, descr string, r, min, max uint32) {
	if r < min || r > max {
		var suffix string
		if r != obj.REG_NONE {
			suffix = fmt.Sprintf(" but got non-%s register %s", descr, RegName(int(r)))
		}
		ctxt.Diag("%v: expected %s register in %s position%s", ins, descr, pos, suffix)
	}
}