tree 3f5f6da00079d8e7fadfae159d00868cfb6e3e23
parent 02f11a2d5cf0db2c2675c13d92bb69529f2175dd
author Cherry Zhang <cherryyz@google.com> 1517948888 -0500
committer Ian Lance Taylor <iant@golang.org> 1517968326 +0000

compiler: make single Btype for methods table of identical interface type

Normally we ensure to build a single Btype for identical types.
We did not do this for methods table of identical interface
types, however. If there are two identical interface type I, I2,
they have the same Btype BI, but different Btypes for their
methods tables, BM and BM2. From the backend's point of view
only one of them is linked to BI. This can cause inconsitency
in the backend's type system, like unresolved placeholder. This
CL ensures we create a single Btype for methods table of
identical interface type.

Change-Id: Ia464d9999af5564b190e0ec1d13d40cb719543d1
Reviewed-on: https://go-review.googlesource.com/92436
Reviewed-by: Ian Lance Taylor <iant@golang.org>