re PR fortran/90329 (Incompatibility between gfortran and C lapack calls)

re PR fortran/90329 (Incompatibility between gfortran and C lapack calls)

	PR fortran/90329
	* lto-streamer.h (LTO_minor_version): Bump to 2.

	Backported from mainline
	2019-05-29  Jakub Jelinek  <jakub@redhat.com>

	PR fortran/90329
	* lang.opt (fbroken-callers): Remove.
	(ftail-call-workaround, ftail-call-workaround=): New options.
	* gfortran.h (struct gfc_namespace): Add implicit_interface_calls.
	* interface.c (gfc_procedure_use): Set implicit_interface_calls
	for calls to implicit interface procedures.
	* trans-decl.c (create_function_arglist): Use flag_tail_call_workaround
	instead of flag_broken_callers.  If it is not 2, also require
	sym->ns->implicit_interface_calls.
	* invoke.texi (fbroken-callers): Remove documentation.
	(ftail-call-workaround, ftail-call-workaround=): Document.

	2019-05-19  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/90329
	* invoke.texi: Document -fbroken-callers.
	* lang.opt: Add -fbroken-callers.
	* trans-decl.c (create_function_arglist): Only set
	DECL_HIDDEN_STRING_LENGTH if flag_broken_callers is set.

	2019-05-16  Jakub Jelinek  <jakub@redhat.com>

	PR fortran/90329
	* tree-core.h (struct tree_decl_common): Document
	decl_nonshareable_flag for PARM_DECLs.
	* tree.h (DECL_HIDDEN_STRING_LENGTH): Define.
	* calls.c (expand_call): Don't try tail call if caller
	has any DECL_HIDDEN_STRING_LENGTH PARM_DECLs that are or might be
	passed on the stack and callee needs to pass any arguments on the
	stack.
	* tree-streamer-in.c (unpack_ts_decl_common_value_fields): Use
	else if instead of series of mutually exclusive ifs.  Handle
	DECL_HIDDEN_STRING_LENGTH for PARM_DECLs.
	* tree-streamer-out.c (pack_ts_decl_common_value_fields): Likewise.

	* trans-decl.c (create_function_arglist): Set
	DECL_HIDDEN_STRING_LENGTH on hidden string length PARM_DECLs if
	len is constant.

From-SVN: r271744