* cgraph.c (same_body_alias_1): Break out of
	(same_body_alias): ... here; remove comdat check; it is handled
	in cp already.
	(cgraph_add_thunk): New.
	(dump_cgraph_node): Dump aliases and thunks.
	* cgraph.h (cgraph_thunk_info): New structure.
	(struct cgraph_node): Add thunk info.
	(cgraph_add_thunk): New.
	* cgraphunit.c (cgraph_emit_thunks): Remove.
	(cgraph_finalize_compilation_unit): Do not call cgraph_emit_thunks.
	(assemble_thunk): New function.
	(cgraph_expand_function): Handle thunks.
	(thunk_adjust): New.
	(init_lowered_empty_function): New.
	* optimize.c (maybe_clone_body): Emit thunks associated to alias.
	* Make-lang.in (method.o): Add dependency on gimple.h.
	* method.c: Include gimple.h
	(make_alias_for_thunk): Use same body alias instead of assemble_alias.
	(use_thunk): Drop codegen; use cgraph_add_thunk; gimplify
	generic thunks.
	* semantics.c (expand_or_defer_fn): Emit associated thunks.
	* cp-objcp-common.h (LANG_HOOKS_CALLGRAPH_EMIT_ASSOCIATED_THUNKS): Remove.
	* lto-cgraph.c (lto_output_node): Stream thunk info.
	(input_node): Likewise.
	* langhooks.h (lang_hooks_for_callgraph): Remove emit_associated_thunks.
	* langhooks-def.h (LANG_HOOKS_CALLGRAPH_EMIT_ASSOCIATED_THUNKS): Remove.
	(LANG_HOOKS_CALLGRAPH_INITIALIZER): Update.
	* i386.c (x86_output_mi_thunk): Make output prettier.

From-SVN: r154736