Revert "Fix PR c++/44188"

Revert "Fix PR c++/44188"

gcc/ChangeLog:
	revert fix for PR c++/44188
	* c-common.c (is_typedef_decl): Revert the moving of  this
	definition ...
	* tree.c (is_typedef_decl): ... here.
	(typdef_variant_p): Revert the moving of this  definition
	here from gcc/cp/tree.c.
	* c-common.h (is_typedef_decl): Revert the moving of this
	declaration ...
	* tree.h (is_typedef_decl): ... here.
	(typedef_variant_p): Revert the moving of this  declaration here
	from gcc/cp/cp-tree.h
	* dwarf2out.c (is_naming_typedef_decl): Revert this new function.
	(gen_tagged_type_die): Revert the splitting out of ...
	(gen_type_die_with_usage): ... this function. Revert the anonymous
	tagged type handling.
	(gen_typedef_die): Revert emitting DW_TAG_typedef  for
	typedefs naming anonymous tagged types.

gcc/cp/ChangeLog:
	Revert fix of PR c++/44188
	* cp-tree.h (typedef_variant_p): Revert moving this declaration to
	gcc/tree.h.
	* tree.c (typedef_variant_p): Revert moving this definition to
	gcc/tree.c.
	* decl.c (grokdeclarator): Revert naming typedef handling.

gcc/testsuite/ChangeLog:
	Revert fix for PR c++/44188
	* g++.dg/debug/dwarf2/typedef3.C: Revert new test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@159955 138bc75d-0d04-0410-961f-82ee72b054a4