* rtl.h (RTL_FLAG_CHECK*): Add an argument for the macro name,

	* rtl.h (RTL_FLAG_CHECK*): Add an argument for the macro name,
	and use it in all invocations of these macros.  Clean up comments.
	* rtl.c (rtl_check_failed_flag): Add an argument for the name
	of the flag access macro whose check failed.
	* doc/rtl.texi (Flags): Document additional flag uses.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@53306 138bc75d-0d04-0410-961f-82ee72b054a4