b = s.endBlock()
			b.Kind = ssa.BlockIf
			b.SetControl(cmp1)
			b.AddEdgeTo(cacheHit)
			b.AddEdgeTo(loopBody)

			// Look for an empty entry, the tombstone for this hash table.
			//   if e.Typ == nil { goto miss }
			s.startBlock(loopBody)
			cmp2 := s.newValue2(ssa.OpEqPtr, typs.Bool, eTyp, s.constNil(typs.BytePtr))
			b = s.endBlock()
			b.Kind = ssa.BlockIf

func http2shouldRetryRequest(req *Request, err error) (*Request, error) {
	if !http2canRetryError(err) {
		return nil, err
	}
	// If the Body is nil (or http.NoBody), it's safe to reuse
	// this request and its Body.
	if req.Body == nil || req.Body == NoBody {
		return req, nil
	}

	// If the request body can be reset back to its original
	// state via the optional req.GetBody, do that.
	if req.GetBody != nil {

the number of arguments bound to <code>p</code> and may differ for each
call site.
</p>

<p>
Given the function and calls
</p>
<pre>
func Greeting(prefix string, who ...string)
Greeting("nobody")
Greeting("hello:", "Joe", "Anna", "Eileen")
</pre>

<p>
within <code>Greeting</code>, <code>who</code> will have the value
<code>nil</code> in the first call, and