===================================================================
@@ -966,7 +966,7 @@ move_by_pieces (rtx to, rtx from, unsign
/* First move what we can in the largest integer mode, then go to
successively smaller modes. */
- while (max_size > 1)
+ while (max_size > 1 && data.len > 0)
{
enum machine_mode mode = widest_int_mode_for_size (max_size);
@@ -1026,7 +1026,7 @@ move_by_pieces_ninsns (unsigned HOST_WID
align = alignment_for_piecewise_move (MOVE_MAX_PIECES, align);
- while (max_size > 1)
+ while (max_size > 1 && l > 0)
{
enum machine_mode mode;
enum insn_code icode;
@@ -2417,7 +2417,7 @@ can_store_by_pieces (unsigned HOST_WIDE_
{
l = len;
max_size = STORE_MAX_PIECES + 1;
- while (max_size > 1)
+ while (max_size > 1 && l > 0)
{
mode = widest_int_mode_for_size (max_size);
@@ -2612,7 +2612,7 @@ store_by_pieces_1 (struct store_by_piece
/* First store what we can in the largest integer mode, then go to
successively smaller modes. */
- while (max_size > 1)
+ while (max_size > 1 && data->len > 0)
{
enum machine_mode mode = widest_int_mode_for_size (max_size);