re PR debug/68860 (FAIL: gcc.dg/guality/pr36728-1.c -flto -O3 -g line 17 arg1...

re PR debug/68860 (FAIL: gcc.dg/guality/pr36728-1.c   -flto -O3 -g  line 17 arg1 == 1)

	PR debug/68860
	* ipa-split.c (split_function): Only perform caller side
	modifications for decl_debug_args here.
	* cgraph.c: Include gimplify.h.
	(cgraph_edge::redirect_call_stmt_to_callee): Add caller side
	debug stmts for decl_debug_args.  Spelling fix in a comment.
	* tree-inline.c (tree_function_versioning): Populate decl_debug_args
	for args_to_skip arguments and add callee side debug stmts.
	Formatting fixes.  Avoid shadowing i variable.

	* gcc.dg/guality/pr68860-1.c: New test.
	* gcc.dg/guality/pr68860-2.c: New test.

From-SVN: r231840