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LABEL_NUSES on deleted labels


The gc now knows that NOTE_INSN_DELETED_LABEL should have a string in the third
part, so we have to make sure we don't use that space to count uses. 

This showed up as a crash building libio for sh-elf.  Ok?

			-Clint


Mon May 22 11:30:48 2000  Clinton Popetz  <cpopetz@cygnus.com>

	* jump.c (jump_optimize_1): Don't increment LABEL_NUSES
	on deleted exception labels.

Index: jump.c
===================================================================
RCS file: /cvs/gcc/egcs/gcc/jump.c,v
retrieving revision 1.127
diff -c -2 -p -r1.127 jump.c
*** jump.c	2000/05/19 19:53:16	1.127
--- jump.c	2000/05/22 16:27:04
*************** jump_optimize_1 (f, cross_jump, noop_mov
*** 246,250 ****
  
    for (insn = exception_handler_labels; insn; insn = XEXP (insn, 1))
!     LABEL_NUSES (XEXP (insn, 0))++;
  
    /* Quit now if we just wanted to rebuild the JUMP_LABEL and REG_LABEL
--- 246,251 ----
  
    for (insn = exception_handler_labels; insn; insn = XEXP (insn, 1))
!     if (GET_CODE (XEXP (insn, 0)) == CODE_LABEL)
!       LABEL_NUSES (XEXP (insn, 0))++;
  
    /* Quit now if we just wanted to rebuild the JUMP_LABEL and REG_LABEL

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