reorg.c: Use rtx_sequence

gcc/
2014-08-27  David Malcolm  <dmalcolm@redhat.com>

	* reorg.c (redundant_insn): In two places in the function, replace
	a check of GET_CODE with a dyn_cast, introducing local "seq", and
	usings methods of rtx_sequence to clarify the code.

From-SVN: r214597

gcc/ChangeLog

 2014-08-27  David Malcolm  <dmalcolm@redhat.com>
 
+	* reorg.c (redundant_insn): In two places in the function, replace
+	a check of GET_CODE with a dyn_cast, introducing local "seq", and
+	usings methods of rtx_sequence to clarify the code.
+
+2014-08-27  David Malcolm  <dmalcolm@redhat.com>
+
 	* jump.c (mark_jump_label_1): Within the SEQUENCE case, introduce
 	local "seq" with a checked cast, and use methods of rtx_sequence
 	to clarify the code.

gcc/reorg.c

@@ -1526,11 +1526,11 @@ redundant_insn (rtx insn, rtx target, rtx delay_list)
       if (GET_CODE (pat) == USE || GET_CODE (pat) == CLOBBER)
 	continue;
 
-      if (GET_CODE (pat) == SEQUENCE)
+      if (rtx_sequence *seq = dyn_cast <rtx_sequence *> (pat))
 	{
 	  /* Stop for a CALL and its delay slots because it is difficult to
 	     track its resource needs correctly.  */
-	  if (CALL_P (XVECEXP (pat, 0, 0)))
+	  if (CALL_P (seq->element (0)))
 	    return 0;
 
 	  /* Stop for an INSN or JUMP_INSN with delayed effects and its delay
@@ -1538,21 +1538,21 @@ redundant_insn (rtx insn, rtx target, rtx delay_list)
 	     correctly.  */
 
 #ifdef INSN_SETS_ARE_DELAYED
-	  if (INSN_SETS_ARE_DELAYED (XVECEXP (pat, 0, 0)))
+	  if (INSN_SETS_ARE_DELAYED (seq->element (0)))
 	    return 0;
 #endif
 
 #ifdef INSN_REFERENCES_ARE_DELAYED
-	  if (INSN_REFERENCES_ARE_DELAYED (XVECEXP (pat, 0, 0)))
+	  if (INSN_REFERENCES_ARE_DELAYED (seq->element (0)))
 	    return 0;
 #endif
 
 	  /* See if any of the insns in the delay slot match, updating
 	     resource requirements as we go.  */
-	  for (i = XVECLEN (pat, 0) - 1; i > 0; i--)
-	    if (GET_CODE (XVECEXP (pat, 0, i)) == GET_CODE (insn)
-		&& rtx_equal_p (PATTERN (XVECEXP (pat, 0, i)), ipat)
-		&& ! find_reg_note (XVECEXP (pat, 0, i), REG_UNUSED, NULL_RTX))
+	  for (i = seq->len () - 1; i > 0; i--)
+	    if (GET_CODE (seq->element (i)) == GET_CODE (insn)
+		&& rtx_equal_p (PATTERN (seq->element (i)), ipat)
+		&& ! find_reg_note (seq->element (i), REG_UNUSED, NULL_RTX))
 	      break;
 
 	  /* If found a match, exit this loop early.  */
@@ -1628,10 +1628,10 @@ redundant_insn (rtx insn, rtx target, rtx delay_list)
       if (GET_CODE (pat) == USE || GET_CODE (pat) == CLOBBER)
 	continue;
 
-      if (GET_CODE (pat) == SEQUENCE)
+      if (rtx_sequence *seq = dyn_cast <rtx_sequence *> (pat))
 	{
 	  bool annul_p = false;
-          rtx control = XVECEXP (pat, 0, 0);
+          rtx control = seq->element (0);
 
 	  /* If this is a CALL_INSN and its delay slots, it is hard to track
 	     the resource needs properly, so give up.  */
@@ -1656,9 +1656,9 @@ redundant_insn (rtx insn, rtx target, rtx delay_list)
 
 	  /* See if any of the insns in the delay slot match, updating
 	     resource requirements as we go.  */
-	  for (i = XVECLEN (pat, 0) - 1; i > 0; i--)
+	  for (i = seq->len () - 1; i > 0; i--)
 	    {
-	      rtx candidate = XVECEXP (pat, 0, i);
+	      rtx candidate = seq->element (i);
 
 	      /* If an insn will be annulled if the branch is false, it isn't
 		 considered as a possible duplicate insn.  */