Do not generate IncMem/DecMem, when the target cpu does not like it.

[r22799]

diff --git a/ir/be/ia32/ia32_transform.c b/ir/be/ia32/ia32_transform.c
index 3ad3e9d..97fc264 100644 (file)
--- a/ir/be/ia32/ia32_transform.c
+++ b/ir/be/ia32/ia32_transform.c
@@ -2153,14 +2153,14 @@ static ir_node *try_create_dest_am(ir_node *node)
        case iro_Add:
                op1      = get_Add_left(val);
                op2      = get_Add_right(val);
-               if (is_Const_1(op2)) {
-                       new_node = dest_am_unop(val, op1, mem, ptr, mode,
-                                               new_rd_ia32_IncMem);
-                       break;
-               } else if (is_Const_Minus_1(op2)) {
-                       new_node = dest_am_unop(val, op1, mem, ptr, mode,
-                                               new_rd_ia32_DecMem);
-                       break;
+               if (ia32_cg_config.use_incdec) {
+                       if (is_Const_1(op2)) {
+                               new_node = dest_am_unop(val, op1, mem, ptr, mode, new_rd_ia32_IncMem);
+                               break;
+                       } else if (is_Const_Minus_1(op2)) {
+                               new_node = dest_am_unop(val, op1, mem, ptr, mode, new_rd_ia32_DecMem);
+                               break;
+                       }
                }
                new_node = dest_am_binop(val, op1, op2, mem, ptr, mode,
                                         new_rd_ia32_AddMem, new_rd_ia32_AddMem8Bit,