//
		// For 32bit mode rules are more permissive.
		// If offset fits uint32, it's permitted.
		// This is allowed for assembly that wants to use 32-bit hex
		// constants, e.g. LEAL 0x99999999(AX), AX.
		overflowOK := (ctxt.Arch.Family == sys.AMD64 && p.As == ALEAL) ||
			(ctxt.Arch.Family != sys.AMD64 &&
				int64(uint32(a.Offset)) == a.Offset &&
				ab.rexflag&Rxw == 0)
		if !overflowOK {

func TestHandlerFinishSkipBigContentLengthRead(t *testing.T) {
	setParallel(t)
	conn := newTestConn()
	conn.readBuf.WriteString(
		"POST / HTTP/1.1\r\n" +
			"Host: test\r\n" +
			"Content-Length: 9999999999\r\n" +
			"\r\n" + strings.Repeat("a", 1<<20))

	ls := &oneConnListener{conn}
	var inHandlerLen int
	go Serve(ls, HandlerFunc(func(rw ResponseWriter, req *Request) {
		inHandlerLen = conn.readBuf.Len()