cp:
PR c++/3130, c++/3131, c++/3132
* cp-tree.h (BINFO_UNSHARED_MARKED): New #define.
* class.c (force_canonical_binfo_r): Move
BINFO_UNSHARED_MARKED, BINFO_LOST_PRIMARY_P. Don't move
virtual bases unless they're primary and what they're primary
too has been moved.
(dfs_unshared_virtual_bases): Use BINFO_UNSHARED_MARKED. Cope
with morally virtual bases. Duplicate BINFO_LOST_PRIMARY_P and
BINFO_PRIMARY_BASE_OF. Clear BINFO_VTABLE for all but the most
derived binfo.
(mark_primary_bases): Use BINFO_UNSHARED_MARKED.
(layout_nonempty_base_or_field): Add most derived type
parameter. Adjust.
(layout_empty_base): Likewise.
(build_base_field): Likewise.
(build_base_fields): Likewise.
(propagate_binfo_offsets): Add most derived type
parameter. Skip non canonical virtual bases too.
(dfs_set_offset_for_unshared_vbases): Don't skip primary
bases. Do skip canonical bases.
(layout_virtual_bases): Adjust.
(layout_class_type): Adjust.
(dfs_get_primary_binfo): Build list of virtual primary base
candidates.
(get_primary_binfo): Check that the shared virtual primary
base candidate was found first.
(accumulate_vtbl_inits): Don't do anything for non-vptr
containing binfos. For case 1 primary virtual bases, keep
checking that we've not emerged from the hierarchy of RTTI_BINFO.
testsuite:
* g++.old-deja/g++.abi/vbase5.C: New test.
* g++.old-deja/g++.abi/vbase6.C: New test.
* g++.old-deja/g++.abi/vbase7.C: New test.
From-SVN: r43266
