re PR debug/47106 (-fcompare-debug failure (length) with -fpartial-inlining -flto...

re PR debug/47106 (-fcompare-debug failure (length) with  -fpartial-inlining -flto -fconserve-stack)

	PR debug/47106
	PR debug/47402
	* cfgexpand.c (account_used_vars_for_block): Remove.
	(estimated_stack_frame_size): Use referenced vars.
	* tree-inline.c (remap_decl): Only mark VAR_DECLs as referenced
	that were referenced in the original function.  Test src_fn
	rather than cfun.  Drop redundant get_var_ann.
	(setup_one_parameter): Drop redundant get_var_ann.
	(declare_return_variable): Likewise.
	(copy_decl_for_dup_finish): Mark VAR_DECLs referenced in src_fn.
	(copy_arguments_for_versioning): Drop redundant get_var_ann.
	* ipa-inline.c (compute_inline_parameters): Do not compute
	disregard_inline_limits here.
	are not available.
	(compute_inlinable_for_current, pass_inlinable): New.
	(pass_inline_parameters): Require PROP_referenced_vars.
	* cgraphunit.c (cgraph_process_new_functions): Don't run
	compute_inline_parameters explicitly unless function is in
	SSA form.
	(cgraph_analyze_function): Set .disregard_inline_limits.
	* tree-sra.c (convert_callers): Compute inliner parameters
	only for functions already in SSA form.
	* g++.dg/debug/pr47106.C: New.

Co-Authored-By: Jan Hubicka <jh@suse.cz>
From-SVN: r170249