go - Fork of Go programming language with my patches.

Age	Commit message (Collapse)	Author
2021-03-24	cmd/compile, cmd/link: use weak reference in itab	Cherry Zhang
	When converting a type T to a non-empty interface I, we build the itab which contains the code pointers of the methods. Currently, this brings those methods live (if the itab is live), even if the interface method is never used. This CL changes the itab to use weak references, so the methods can be pruned if not otherwise live. Fixes #42421. Change-Id: Iee5de2ba11d603c5a102a2ba60440d839a7f9702 Reviewed-on: https://go-review.googlesource.com/c/go/+/268479 Trust: Cherry Zhang <cherryyz@google.com> Run-TryBot: Cherry Zhang <cherryyz@google.com> TryBot-Result: Go Bot <gobot@golang.org> Reviewed-by: Than McIntosh <thanm@google.com>
2020-09-29	cmd/link: retain only used interface methods	Cherry Zhang
	Currently, in the linker's deadcode pass, when an interface type is live, the linker thinks all its methods are live, and uses them to match methods on concrete types. The interface method may never be used, though. This CL changes it to only keep used interface methods, for matching concrete type methods. To do that, when an interface method is used, the compiler generates a mark relocation. The linker uses the marker relocations to mark used interface methods, and only the used ones. binary size before after cmd/compile 18887400 18812200 cmd/go 13470652 13470492 Change-Id: I3cfd9df4a53783330ba87735853f2a0ec3c42802 Reviewed-on: https://go-review.googlesource.com/c/go/+/256798 Trust: Cherry Zhang <cherryyz@google.com> Reviewed-by: Than McIntosh <thanm@google.com> Reviewed-by: Jeremy Faller <jeremy@golang.org>