| commit | 0c9e54e82692e2e30e1defcddfac8f0db55097a1 | |
| author | jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4> | |
| Wed, 3 Oct 2018 15:56:29 +0000 (3 15:56 +0000) | ||
| committer | jason <jason@138bc75d-0d04-0410-961f-82ee72b054a4> | |
| Wed, 3 Oct 2018 15:56:29 +0000 (3 15:56 +0000) | ||
| tree | b89298bfa67ef964fcefa62e3d8b27bfd7807c1d | treesnapshot (tar.gz zip) |
| parent | d1b6467ac88990ef92f4b5844f6069419fef02e9 | commitdiff |
Implement P0840, language support for empty objects.
The [[no_unique_address]] attribute on a non-static data member
enables the equivalent of the empty base optimization.
gcc/cp/
* tree.c (handle_no_unique_addr_attribute): New.
(cxx_attribute_table): Add [[no_unique_address]].
* class.c (field_poverlapping_p): New.
(layout_class_type): Check it. Adjust DECL_SIZE of potentially
overlapping fields.
(layout_empty_base_or_field): Rename from layout_empty_base, handle
FIELD_DECL as well.
(build_base_field, record_subobject_offsets): Adjust.
c-family/
* c-lex.c (c_common_has_attribute): Add no_unique_address.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@264813 138bc75d-0d04-0410-961f-82ee72b054a4
The [[no_unique_address]] attribute on a non-static data member
enables the equivalent of the empty base optimization.
gcc/cp/
* tree.c (handle_no_unique_addr_attribute): New.
(cxx_attribute_table): Add [[no_unique_address]].
* class.c (field_poverlapping_p): New.
(layout_class_type): Check it. Adjust DECL_SIZE of potentially
overlapping fields.
(layout_empty_base_or_field): Rename from layout_empty_base, handle
FIELD_DECL as well.
(build_base_field, record_subobject_offsets): Adjust.
c-family/
* c-lex.c (c_common_has_attribute): Add no_unique_address.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@264813 138bc75d-0d04-0410-961f-82ee72b054a4
12 files changed: