reload.c (find_equiv_reg): When looking for stack pointer + const, make sure we…

reload.c (find_equiv_reg): When looking for stack pointer + const, make sure we don't use a stack adjust.

        * reload.c (find_equiv_reg): When looking for stack pointer + const,
        make sure we don't use a stack adjust.

From-SVN: r20985

gcc/ChangeLog

@@ -76,6 +76,9 @@ Mon Jul  6 22:50:48 1998  Jason Merrill  <jason@yorick.cygnus.com>
 
 Mon Jul  6 22:47:55 1998  J"orn Rennecke <amylaar@cygnus.co.uk>
 
+	* reload.c (find_equiv_reg): When looking for stack pointer + const,
+	make sure we don't use a stack adjust.
+
 	* reload.c (find_equiv_reg): If need_stable_sp is set,
 	check if stack pointer is changed directly.
 

gcc/reload.c

@@ -6017,6 +6017,9 @@ find_equiv_reg (goal, insn, class, other, reload_reg_p, goalreg, mode)
 		   && (valueno = true_regnum (valtry = SET_SRC (pat))) >= 0)
 		  ||
 		  (goal_const && rtx_equal_p (SET_SRC (pat), goal)
+		   /* When looking for stack pointer + const,
+		      make sure we don't use a stack adjust.  */
+		   && !reg_overlap_mentioned_for_reload_p (SET_DEST (pat), goal)
 		   && (valueno = true_regnum (valtry = SET_DEST (pat))) >= 0)
 		  || (goal_mem
 		      && (valueno = true_regnum (valtry = SET_DEST (pat))) >= 0