* c-common.c (shadow_warning): Delete.
	* c-common.h (free_parser_stacks, shadow_warning, sw_kind): Delete.
	* c-decl.c (warn_if_shadowing): Issue shadow warnings directly.
	* c-opts.c (c_common_parse_file): Don't call free_parser_stacks.
	* c-parse.in (free_parser_stacks): Delete.
cp:
	* name-lookup.c (pushdecl): Issue shadow warnings directly.
	* parser.c (free_parser_stacks): Delete.
testsuite:
	* gcc.c-torture/execute/string-opt-15.c: Define memcmp with void *
	arguments.
	* gcc.dg/fwritable-strings-1.c: Expect the deprecation notice.
------
	Bug 13856
	* c-decl.c (diagnose_mismatched_decls): Only give special
	treatment when olddecl is DECL_BUILT_IN, if C_DECL_INVISIBLE
	is also true.
	(merge_decls): Don't clear DECL_BUILT_IN_CLASS and
	DECL_FUNCTION_CODE when defining a built-in function.
	Don't update DECL_ESTIMATED_INSNS.
	* dwarf2out.c (dwarf2out_decl): Don't ignore built-in
	FUNCTION_DECLs.
	* tree.h: Delete DECL_ESTIMATED_INSNS.
	* tree-inline.c (struct inline_data): Delete inlined_insns field.
	(expand_call_inline, optimize_inline_calls): Don't update
	DECL_ESTIMATED_INSNS nor inlined_insns.
	* cgraphunit.c (cgraph_analyze_function): Don't update
	DECL_ESTIMATED_INSNS.
cp:
	* optimize.c (maybe_clone_body): Don't update DECL_ESTIMATED_INSNS.
	* decl.c (duplicate_decls, start_function): Likewise.
testsuite:
	* gcc.dg/visibility-8.c: New testcase.

From-SVN: r77475