r251035 - in /trunk/gcc: cp/ChangeLog cp/call.c...

[jason@gcc.gnu.org]

Author: jason
Date: Thu Aug 10 19:07:30 2017
New Revision: 251035

URL: https://gcc.gnu.org/viewcvs?rev=251035&root=gcc&view=rev
Log:
	PR c++/80452 - Core 1579, implicit move semantics on return/throw

	* cp-tree.h (LOOKUP_PREFER_RVALUE): Now means that we've already
	tentatively changed the lvalue to an rvalue.
	* call.c (reference_binding): Remove LOOKUP_PREFER_RVALUE handling.
	(build_over_call): If LOOKUP_PREFER_RVALUE, check that the first
	parameter is an rvalue reference.
	* except.c (build_throw): Do maybe-rvalue overload resolution twice.
	* typeck.c (check_return_expr): Likewise.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/move-return1.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/call.c
    trunk/gcc/cp/cp-tree.h
    trunk/gcc/cp/except.c
    trunk/gcc/cp/typeck.c