// entry block prolog.
func locatePrologEnd(f *Func, needCloCtx bool) (ID, *Value) {

	// returns true if this instruction looks like it moves an ABI
	// register (or context register for rangefunc bodies) to the
	// stack, along with the value being stored.
	isRegMoveLike := func(v *Value) (bool, ID) {
		n, ok := v.Aux.(*ir.Name)
		var r ID
		if (!ok || n.Class != ir.PPARAM) && !needCloCtx {
			return false, r

// the generated ODCLFUNC, but there is no
// pointer from the Func back to the OMETHVALUE.
type Func struct {
	miniNode
	Body Nodes

	Nname    *Name        // ONAME node
	OClosure *ClosureExpr // OCLOSURE node

	// ONAME nodes for all params/locals for this func/closure, does NOT
	// include closurevars until transforming closures during walk.
	// Names must be listed PPARAMs, PPARAMOUTs, then PAUTOs,

	// We can only be inside one type parameter list at any given time:
	// function closures may appear inside a type parameter list but they
	// cannot be generic, and their bodies are processed in delayed and
	// sequential fashion. Note that with each new declaration, we save
	// the existing environment and restore it when done; thus inTParamList

			assert(rhs != nil)
			alias.fromRHS = rhs
			Unalias(alias) // resolve alias.actual
		} else {
			// With Go1.23, the default behavior is to use Alias nodes,
			// reflected by check.enableAlias. Signal non-default behavior.
			//
			// TODO(gri) Testing runs tests in both modes. Do we need to exclude
			//           tracking of non-default behavior for tests?
			gotypesalias.IncNonDefault()

			if !versionErr && tparam0 != nil {

	RegArgs []Spill
	// OwnAux describes parameters and results for this function.
	OwnAux *AuxCall
	// CloSlot holds the compiler-synthesized name (".closureptr")
	// where we spill the closure pointer for range func bodies.
	CloSlot *ir.Name

	freeValues *Value // free Values linked by argstorage[0].  All other fields except ID are 0/nil.
	freeBlocks *Block // free Blocks linked by succstorage[0].b.  All other fields except ID are 0/nil.

		// afterwards)
	}))
}

func send204(w ResponseWriter, r *Request) { w.WriteHeader(204) }
func send304(w ResponseWriter, r *Request) { w.WriteHeader(304) }

// Issue 15647: 204 responses can't have bodies, so HTTP/1.0 keep-alive conns should stay open.
func TestHTTP10KeepAlive204Response(t *testing.T) {
	testTCPConnectionStaysOpen(t, "GET / HTTP/1.0\r\nConnection: keep-alive\r\n\r\n", HandlerFunc(send204))
}

		// Println etc. set verb to %v, which is "stringable".
		switch verb {
		case 'v', 's', 'x', 'X', 'q':
			// Is it an error or Stringer?
			// The duplication in the bodies is necessary:
			// setting handled and deferring catchPanic
			// must happen before calling the method.
			switch v := p.arg.(type) {
			case error:
				handled = true
				defer p.catchPanic(p.arg, verb, "Error")

		rp.ServeHTTP(w, r)
	}))

	bodyRes := make(chan any, 1) // error or hash.Hash
	pr, pw := io.Pipe()
	req, _ := NewRequest("PUT", proxy.ts.URL, pr)
	const size = 4 << 20
	go func() {
		h := sha1.New()
		_, err := io.CopyN(io.MultiWriter(h, pw), rand.Reader, size)
		go pw.Close()
		if err != nil {
			bodyRes <- err
		} else {
			bodyRes <- h
		}
	}()

    * Composite bodies' IDs are now based on path, not only on route name, as the auto-generated name uses the function names, that can be duplicated in different modules.
    * The same new ID generation applies to response models.
    * This also changes the generated title for those models.

			}

			select {
			case rc.ch <- responseAndError{err: err}:
			case <-rc.callerGone:
				return
			}
			return
		}
		pc.readLimit = maxInt64 // effectively no limit for response bodies

		pc.mu.Lock()
		pc.numExpectedResponses--
		pc.mu.Unlock()

		bodyWritable := resp.bodyIsWritable()
		hasBody := rc.treq.Request.Method != "HEAD" && resp.ContentLength != 0