tree d8998cf953e3d0bf60cba82cccafbf7161ac0111
parent ea7ac7784791dca517b6681a02c39c11bf136755
author Cherry Zhang <cherryyz@google.com> 1531354795 -0400
committer Ian Lance Taylor <iant@golang.org> 1531369087 +0000

compiler: build a single backend type for type alias

A type alias and its underlying type are identical. Build a
single backend type for them. Previously we build two backend
types, which sometimes confuse the backend's type system.

Also don't include type aliases into the list of named type
declarations, since they are not named types.

Change-Id: Id212aca9af2cf988c3733a6bf8e4b1aeed9bfe75
Reviewed-on: https://go-review.googlesource.com/123362
Reviewed-by: Ian Lance Taylor <iant@golang.org>