2e29eb57db
The chanrecv funcs don't use it at all. The chansend ones do, but the element type is now part of the hchan struct, which is already a parameter. hchan can be nil in chansend when sending to a nil channel, so when instrumenting we must copy to the stack to be able to read the channel type. name old time/op new time/op delta ChanUncontended 6.42µs ± 1% 6.22µs ± 0% -3.06% (p=0.000 n=19+18) Initially found by github.com/mvdan/unparam. Fixes #19591. Change-Id: I3a5e8a0082e8445cc3f0074695e3593fd9c88412 Reviewed-on: https://go-review.googlesource.com/38351 Run-TryBot: Daniel Martí <mvdan@mvdan.cc> TryBot-Result: Gobot Gobot <gobot@golang.org> Reviewed-by: Matthew Dempsky <mdempsky@google.com>
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