reload1.c:eliminate_regs_in_insn bugfix

[Joern Rennecke]

Wed Oct 25 19:43:04 2000  J"orn Rennecke <amylaar@redhat.com>

	* reload1.c (eliminate_regs_in_insn): Allow a set to be a PARALLEL
	with (clobber (match_scratch...)).

Index: reload1.c
===================================================================
RCS file: /cvs/cvsfiles/devo/gcc/reload1.c,v
retrieving revision 1.277
diff -p -r1.277 reload1.c
*** reload1.c	2000/10/16 22:11:01	1.277
--- reload1.c	2000/10/25 18:40:52
*************** eliminate_regs_in_insn (insn, replace)
*** 2945,2957 ****
  
  	    if (offset == 0)
  	      {
! 		/* We assume here that we don't need a PARALLEL of
! 		   any CLOBBERs for this assignment.  There's not
! 		   much we can do if we do need it.  */
  		PATTERN (insn) = gen_rtx_SET (VOIDmode,
  					      SET_DEST (old_set),
  					      ep->to_rtx);
! 		INSN_CODE (insn) = recog (PATTERN (insn), insn, 0);
  		if (INSN_CODE (insn) < 0)
  		  abort ();
  	      }
--- 2946,2971 ----
  
  	    if (offset == 0)
  	      {
! 		int num_clobbers;
! 		/* We assume here that if we need a PARALLEL with
! 		   CLOBBERs for this assignment, we can do with the
! 		   MATCH_SCRATCHes that add_clobbers allocates.
! 		   There's not much we can do if that doesn't work.  */
  		PATTERN (insn) = gen_rtx_SET (VOIDmode,
  					      SET_DEST (old_set),
  					      ep->to_rtx);
! 		num_clobbers = 0;
! 		INSN_CODE (insn) = recog (PATTERN (insn), insn, &num_clobbers);
! 		if (num_clobbers)
! 		  {
! 		    PATTERN (insn)
! 		      = gen_rtx_PARALLEL (VOIDmode,
! 					  gen_rtvec (num_clobbers + 1,
! 						     PATTERN (insn)));
! 		    add_clobbers (PATTERN (insn), INSN_CODE (insn));
! 		    if (extract_insn (insn), ! constrain_operands (1))
! 		      abort ();
! 		  }
  		if (INSN_CODE (insn) < 0)
  		  abort ();
  	      }