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rtl checking fixes


Two things that showed up on Alpha just building libgcc.a.


r~

        * reload1.c (eliminate_regs_in_insn): Avoid eliminating the
        reg notes on a deleted insn.
        * gcse.c (hash_expr_1): Use XWINT on a CONST_DOUBLE.

Index: reload1.c
===================================================================
RCS file: /egcs/carton/cvsfiles/egcs/gcc/reload1.c,v
retrieving revision 1.156
diff -c -p -d -r1.156 reload1.c
*** reload1.c	1999/09/01 14:30:34	1.156
--- reload1.c	1999/09/03 04:45:29
*************** eliminate_regs_in_insn (insn, replace)
*** 3355,3361 ****
  	       If REPLACE isn't set, we can't delete this insn, but needn't
  	       process it since it won't be used unless something changes.  */
  	    if (replace)
! 	      delete_dead_insn (insn);
  	    val = 1;
  	    goto done;
  	  }
--- 3355,3364 ----
  	       If REPLACE isn't set, we can't delete this insn, but needn't
  	       process it since it won't be used unless something changes.  */
  	    if (replace)
! 	      {
! 	        delete_dead_insn (insn);
! 		return 1;
! 	      }
  	    val = 1;
  	    goto done;
  	  }
Index: gcse.c
===================================================================
RCS file: /egcs/carton/cvsfiles/egcs/gcc/gcse.c,v
retrieving revision 1.47
diff -c -p -d -r1.47 gcse.c
*** gcse.c	1999/09/02 17:29:21	1.47
--- gcse.c	1999/09/03 04:49:22
*************** hash_expr_1 (x, mode, do_not_record_p)
*** 1363,1369 ****
        if (GET_MODE (x) != VOIDmode)
  	for (i = 2; i < GET_RTX_LENGTH (CONST_DOUBLE); i++)
  	  {
! 	    unsigned tem = XINT (x, i);
  	    hash += tem;
  	  }
        else
--- 1363,1369 ----
        if (GET_MODE (x) != VOIDmode)
  	for (i = 2; i < GET_RTX_LENGTH (CONST_DOUBLE); i++)
  	  {
! 	    unsigned tem = XWINT (x, i);
  	    hash += tem;
  	  }
        else


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