decl.c (smallest_type_location): New.

decl.c (smallest_type_location): New.

/cp
2019-06-05  Paolo Carlini  <paolo.carlini@oracle.com>

	* decl.c (smallest_type_location): New.
	(check_special_function_return_type): Use it.
	(grokdeclarator): Lkewise.

/testsuite
2019-06-05  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/diagnostic/return-type-invalid-1.C: New.
	* g++.old-deja/g++.brendan/crash16.C: Adjust.
	* g++.old-deja/g++.law/ctors5.C: Likewise.

/cp
2019-06-05  Paolo Carlini  <paolo.carlini@oracle.com>

	* decl.c (grokdeclarator): Use locations[ds_friend]
	in one place.

/testsuite
2019-06-05  Paolo Carlini  <paolo.carlini@oracle.com>

	* g++.dg/other/friend4.C: Test locations too.
	* g++.dg/other/friend5.C: Likewise.
	* g++.dg/other/friend7.C: Likewise.

From-SVN: r271974