[patch 2/6] scalar-storage-order merge: C front-end

[Eric Botcazou]

This is the C front-end + C family part.

	* doc/extend.texi (type attributes): Document scalar_storage_order.
	(Structure-Packing Pragmas): Rename into...
	(Structure-Layout Pragmas): ...this.  Document scalar_storage_order.
	* doc/invoke.texi (C Dialect Options): Document -fsso-struct
	(Warnings): Document -Wno-scalar-storage-order.
	* flag-types.h (enum scalar_storage_order_kind): New enumeration.
c-family/
	* c-common.c (c_common_attributes): Add scalar_storage_order.
	(handle_scalar_storage_order_attribute): New function.
	* c-pragma.c (global_sso): New variable.
	(maybe_apply_pragma_scalar_storage_order): New function.
	(handle_pragma_scalar_storage_order): Likewise.
	(init_pragma): Register scalar_storage_order.
	* c-pragma.h (maybe_apply_pragma_scalar_storage_order): Declare.
	* c.opt (Wscalar-storage-order): New warning.
	(fsso-struct=): New option.
c/
	* c-decl.c (finish_struct): If the structure has reverse storage
	order, rewrite the type of array fields with scalar component.  Call
	maybe_apply_pragma_scalar_storage_order on entry.
	* c-typeck.c (build_unary_op) <ADDR_EXPR>: Remove left-overs.  Issue
	errors on bit-fields and reverse SSO here and not...
	(c_mark_addressable): ...here.
	(output_init_element): Adjust call to initializer_constant_valid_p.
	(c_build_qualified_type): Propagate TYPE_REVERSE_STORAGE_ORDER.

 doc/extend.texi     |   69 ++++++++++++++++++++++++++++++++++++++++++--------
 doc/invoke.texi     |   22 +++++++++++++++-
 flag-types.h        |    9 +++++-
 c-family/c.opt      |   17 ++++++++++++
 c-family/c-common.c |   47 ++++++++++++++++++++++++++++++++++-
 c-family/c-pragma.c |   50 +++++++++++++++++++++++++++++++++++++
 c-family/c-pragma.h |    1 
 c/c-typeck.c        |   66 ++++++++++++++++++++++++++++++++++---------------
 c/c-decl.c          |   48 +++++++++++++++++++++++++-----------
 8 files changed, 273 insertions(+), 47 deletions(-)

-- 
Eric Botcazou
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