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For example, take this Golang CL: https://go-review.googlesource.com/c/go/+/100455
The func was always called like:
mkinlcall(n, n.Left, n.Isddd())
mkinlcall(n, f, n.Isddd())
etc
Since the func always receives n, receiving n.Method() is redundant.
Other redundant cases that come to mind, when a func receives x:
x.Field
x[i]
x[i:j]
*x
And of course, any combination of the above.
I'm leaving x.PureMethod() and PureFunc(x) out of the list as that's a much more complex one - we'd have to figure out that the func has no side effects. I don't think SSA does this just yet.
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