Hi,

fold_ctor_reference attempts to use a recursive local processing in order to 
call native_encode_expr on the leaf nodes of the constructor, before falling 
back to calling native_encode_initializer if this fails.  There are a couple 
of issues related to endianness present in it:
  1) it does not specifically handle integral bit-fields; now these are left 
justified on big-endian platforms so cannot be treated like ordinary fields.
  2) it does not check that the constructor uses the native storage order.

Proposed fix attached, tested on x86-64/Linux and SPARC/Solaris, OK for the 
mainline and some branches?


2023-06-30  Eric Botcazou  <ebotcazou@adacore.com>

	* gimple-fold.cc (fold_array_ctor_reference): Fix head comment.
	(fold_nonarray_ctor_reference): Likewise.  Specifically deal
	with integral bit-fields.
	(fold_ctor_reference): Check that the constructor uses the
	native storage order.


2023-06-30  Eric Botcazou  <ebotcazou@adacore.com>

	* gcc.c-torture/execute/20230630-1.c: New test.
	* gcc.c-torture/execute/20230630-2.c: Likewise.

-- 
Eric Botcazou