tree f76f0d90bb375113db08f4eb546943cabbb14e01
parent bcafcb3c39530bb325514d6377747eb3127d1a03
author Ian Lance Taylor <iant@golang.org> 1624924075 -0700
committer Ian Lance Taylor <iant@golang.org> 1624989570 +0000

compiler: in composite literals use temps only for interfaces

For a composite literal we only need to introduce a temporary variable
if we may be converting to an interface type, so only do it then.
This saves over 80% of compilation time when using gccgo to compile
cmd/internal/obj/x86, as the GCC middle-end spends a lot of time
pointlessly computing interactions between temporary variables.

For golang/go#46600

Change-Id: I6f01a3c84762b9d06268c5304af6ffce14a0a031
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/331513
Trust: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Than McIntosh <thanm@google.com>