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cmd/compile: omit unnecessary interface method expression wrappers

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We'll always generate method expression wrappers for declared
interface types in their own package, so no need to generate them in
downstream packages.

Noticed by gri@ while looking into #21282.

Change-Id: I4fb7051b4e15297933da05fdd2b111d6b8f4178e
Reviewed-on: https://go-review.googlesource.com/106175
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
Reviewed-by: Robert Griesemer <gri@golang.org>
This commit is contained in:
Matthew Dempsky 2018-04-10 15:13:49 -07:00
parent 607953609c
commit 80bbad015d
1 changed files with 5 additions and 0 deletions
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5
src/cmd/compile/internal/gc/subr.go
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@ -1633,6 +1633,11 @@ func genwrapper(rcvr *types.Type, method *types.Field, newnam *types.Sym) {
return
}
// Only generate I.M wrappers for I in I's own package.
if rcvr.IsInterface() && rcvr.Sym != nil && rcvr.Sym.Pkg != localpkg {
return
}
lineno = autogeneratedPos
dclcontext = PEXTERN