[Bug c++/49896] undefined reference to static const integral member whose address is not used, for some values of the constant

["jason at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49896

--- Comment #9 from Jason Merrill <jason at gcc dot gnu.org> 2011-10-11 17:53:20 UTC ---
Author: jason
Date: Tue Oct 11 17:53:07 2011
New Revision: 179813

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=179813
Log:
    PR c++/49855
    PR c++/49896
    * cp-tree.def (IMPLICIT_CONV_EXPR): New.
    * call.c (perform_implicit_conversion_flags): Build it
    instead of NOP_EXPR.
    * cp-objcp-common.c (cp_common_init_ts): It's typed.
    * cxx-pretty-print.c (pp_cxx_cast_expression): Handle it.
    (pp_cxx_expression): Likewise.
    * error.c (dump_expr): Likewise.
    * semantics.c (potential_constant_expression_1): Likewise.
    * tree.c (cp_tree_equal): Likewise.
    (cp_walk_subtrees): Likewise.
    * pt.c (iterative_hash_template_arg): Likewise.
    (for_each_template_parm_r): Likewise.
    (type_dependent_expression_p): Likewise.
    (tsubst_copy, tsubst_copy_and_build): Handle IMPLICIT_CONV_EXPR
    and CONVERT_EXPR.
    * cp-tree.h (IMPLICIT_CONV_EXPR_DIRECT_INIT): New.

Added:
    trunk/gcc/testsuite/g++.dg/cpp0x/constexpr-template3.C
    trunk/gcc/testsuite/g++.dg/template/constant1.C
    trunk/gcc/testsuite/g++.dg/template/constant2.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/call.c
    trunk/gcc/cp/cp-objcp-common.c
    trunk/gcc/cp/cp-tree.def
    trunk/gcc/cp/cp-tree.h
    trunk/gcc/cp/cxx-pretty-print.c
    trunk/gcc/cp/error.c
    trunk/gcc/cp/pt.c
    trunk/gcc/cp/semantics.c
    trunk/gcc/cp/tree.c
    trunk/gcc/testsuite/ChangeLog