From 3bce790414afaaba10e03f7bb41e4aa3279694f5 Mon Sep 17 00:00:00 2001 From: Richard Sandiford Date: Wed, 29 Apr 2020 13:47:21 +0100 Subject: calls: Remove FIXME for cxx17_empty_base_field_p This predicate is now used by aarch64 targets. 2020-04-29 Richard Sandiford gcc/ * calls.h (cxx17_empty_base_field_p): Turn into a function declaration. * calls.c (cxx17_empty_base_field_p): New function. Check DECL_ARTIFICIAL and RECORD_OR_UNION_TYPE_P in addition to the previous checks. --- gcc/calls.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) (limited to 'gcc/calls.c') diff --git a/gcc/calls.c b/gcc/calls.c index 5bd9227..8041388 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" -- cgit v1.1