GCC: tm.texi, 1.4 -> 1.5

[Jan-Benedict Glaw]

Update of /mnt/vax-development/CVS_Repository/gcc/gcc/doc
In directory mail:/mnt/vax-development/local_work/work-jbglaw/local-cvs/gcc/gcc/doc

Modified Files:
	tm.texi 
Log Message:
- - - -- -- A U T O M A T I C   C H E C K I N -- -- - - -
	* rtl.def (NIL): Delete.
	* read-rtl.c (read_rtx): Handle (nil) like (define_constants).
	Tighten the syntax a little.
	
	* cfgloop.h, combine.c, cse.c, loop-iv.c, postreload.c, reload.c
	* config/alpha/alpha.c, config/alpha/alpha.h, config/arc/arc.h
	* config/arm/arm.h, config/frv/frv.h, config/i386/i386.c
	* config/i386/predicates.md, config/m32r/m32r.h
	* config/m68hc11/m68hc11.c, config/mcore/mcore.h, config/mips/mips.c
	* config/mmix/mmix.c, config/pa/pa.h, config/sh/sh.h
	* config/sparc/sparc.h, doc/tm.texi:
	Replace all occurrences of NIL with UNKNOWN.