diff options
Diffstat (limited to 'gcc/calls.c')
| -rw-r--r-- | gcc/calls.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/gcc/calls.c b/gcc/calls.c index 5bd922779af..8041388c1d2 100644 --- a/gcc/calls.c +++ b/gcc/calls.c @@ -6261,5 +6261,20 @@ must_pass_va_arg_in_stack (tree type) return targetm.calls.must_pass_in_stack (arg); } +/* Return true if FIELD is the C++17 empty base field that should + be ignored for ABI calling convention decisions in order to + maintain ABI compatibility between C++14 and earlier, which doesn't + add this FIELD to classes with empty bases, and C++17 and later + which does. */ + +bool +cxx17_empty_base_field_p (const_tree field) +{ + return (DECL_FIELD_ABI_IGNORED (field) + && DECL_ARTIFICIAL (field) + && RECORD_OR_UNION_TYPE_P (TREE_TYPE (field)) + && !lookup_attribute ("no_unique_address", DECL_ATTRIBUTES (field))); +} + /* Tell the garbage collector about GTY markers in this source file. */ #include "gt-calls.h" |