r269459 - in /trunk/gcc: ChangeLog gimple-fold....

[jason@gcc.gnu.org]

Author: jason
Date: Thu Mar  7 15:10:22 2019
New Revision: 269459

URL: https://gcc.gnu.org/viewcvs?rev=269459&root=gcc&view=rev
Log:
	PR c++/80916 - spurious "static but not defined" warning.

Nothing can refer to an internal decl with no definition, so we shouldn't
treat such a decl as a possible devirtualization target.

	* gimple-fold.c (can_refer_decl_in_current_unit_p): Return false
	for an internal symbol with DECL_EXTERNAL.

Added:
    trunk/gcc/testsuite/g++.dg/warn/unused-fn1.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gimple-fold.c