(expand_increment): If op0 is a MEM, enqueue insn to load it into a

REG, not just the one to store it.

From-SVN: r18388

1 files changed, 8 insertions, 1 deletions

diff --git a/gcc/expr.c b/gcc/expr.c
index d408c3e2fab..8d03d29bc9f 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -10033,7 +10033,11 @@ expand_increment (exp, post, ignore)
 	  rtx temp, result;
 
 	  op0 = change_address (op0, VOIDmode, addr);
-	  temp = force_reg (GET_MODE (op0), op0);
+	  if (GET_CODE (op0) != REG)
+	    temp = gen_reg_rtx (GET_MODE (op0));
+	  else
+	    temp = op0;
+
 	  if (! (*insn_operand_predicate[icode][2]) (op1, mode))
 	    op1 = force_reg (mode, op1);
 
@@ -10041,6 +10045,9 @@ expand_increment (exp, post, ignore)
 	     the instructions in reverse order.  */
 	  enqueue_insn (op0, gen_move_insn (op0, temp));
 	  result = enqueue_insn (temp, GEN_FCN (icode) (temp, temp, op1));
+	  if (temp != op0)
+	    result = enqueue_insn (temp, gen_move_insn (temp, op0));
+
 	  return result;
 	}
     }