Delete find_last_value

gcc/
2014-08-28  David Malcolm  <dmalcolm@redhat.com>

	* rtl.h (find_last_value): Delete.
	* rtlanal.c (find_last_value): Delete.

From-SVN: r214694

gcc/ChangeLog

 2014-08-28  David Malcolm  <dmalcolm@redhat.com>
 
+	* rtl.h (find_last_value): Delete.
+	* rtlanal.c (find_last_value): Delete.
+
+2014-08-28  David Malcolm  <dmalcolm@redhat.com>
+
 	* cfgexpand.c (pass_expand::execute): Strengthen local "after"
 	from rtx to rtx_insn *.
 	* cfgrtl.c (force_nonfallthru_and_redirect): Replace use of local

gcc/rtl.h

@@ -2751,7 +2751,6 @@ extern rtx single_set_2 (const_rtx, const_rtx);
 extern int multiple_sets (const_rtx);
 extern int set_noop_p (const_rtx);
 extern int noop_move_p (const_rtx);
-extern rtx find_last_value (rtx, rtx *, rtx, int);
 extern int refers_to_regno_p (unsigned int, unsigned int, const_rtx, rtx *);
 extern int reg_overlap_mentioned_p (const_rtx, const_rtx);
 extern const_rtx set_of (const_rtx, const_rtx);

gcc/rtlanal.c

@@ -1361,52 +1361,6 @@ noop_move_p (const_rtx insn)
 }
 
 
-/* Return the last thing that X was assigned from before *PINSN.  If VALID_TO
-   is not NULL_RTX then verify that the object is not modified up to VALID_TO.
-   If the object was modified, if we hit a partial assignment to X, or hit a
-   CODE_LABEL first, return X.  If we found an assignment, update *PINSN to
-   point to it.  ALLOW_HWREG is set to 1 if hardware registers are allowed to
-   be the src.  */
-
-rtx
-find_last_value (rtx x, rtx *pinsn, rtx valid_to, int allow_hwreg)
-{
-  rtx p;
-
-  for (p = PREV_INSN (*pinsn); p && !LABEL_P (p);
-       p = PREV_INSN (p))
-    if (INSN_P (p))
-      {
-	rtx set = single_set (p);
-	rtx note = find_reg_note (p, REG_EQUAL, NULL_RTX);
-
-	if (set && rtx_equal_p (x, SET_DEST (set)))
-	  {
-	    rtx src = SET_SRC (set);
-
-	    if (note && GET_CODE (XEXP (note, 0)) != EXPR_LIST)
-	      src = XEXP (note, 0);
-
-	    if ((valid_to == NULL_RTX
-		 || ! modified_between_p (src, PREV_INSN (p), valid_to))
-		/* Reject hard registers because we don't usually want
-		   to use them; we'd rather use a pseudo.  */
-		&& (! (REG_P (src)
-		      && REGNO (src) < FIRST_PSEUDO_REGISTER) || allow_hwreg))
-	      {
-		*pinsn = p;
-		return src;
-	      }
-	  }
-
-	/* If set in non-simple way, we don't have a value.  */
-	if (reg_set_p (x, p))
-	  break;
-      }
-
-  return x;
-}
-
 /* Return nonzero if register in range [REGNO, ENDREGNO)
    appears either explicitly or implicitly in X
    other than being stored into.