[PATCH]: Fix simple regscan bug

[Daniel Berlin]

Noticed on the new-regalloc branch, but bug exists in mainline too.

According to the comment above REG_N_REFS, a set counts as a ref.
Yet we incremented REG_N_SETS without incrementing REG_N_REFS, which
is wrong.

2001-07-27  Daniel Berlin  <dan@cgsoftware.com>

	* regclass.c (reg_scan_mark_refs): Increment REG_N_REFS when we
	increment REG_N_SETS.

Index: regclass.c
===================================================================
RCS file: /cvs/gcc/egcs/gcc/regclass.c,v
retrieving revision 1.124
diff -c -3 -p -w -B -b -r1.124 regclass.c
*** regclass.c	2001/07/20 16:55:03	1.124
--- regclass.c	2001/07/27 18:12:24
*************** reg_scan_mark_refs (x, insn, note_flag, 
*** 2427,2433 ****
--- 2427,2436 ----
  
        if (GET_CODE (dest) == REG
  	  && REGNO (dest) >= min_regno)
+ 	{
  	  REG_N_SETS (REGNO (dest))++;
+ 	  REG_N_REFS (REGNO (dest))++;
+ 	}
  
        /* If this is setting a pseudo from another pseudo or the sum of a
  	 pseudo and a constant integer and the other pseudo is known to be

-- 
"For my birthday I got a humidifier and a de-humidifier...  I put
them in the same room and let them fight it out.  Then I filled
my humidifier with wax, and now my room is all shiny.
"-Steven Wright