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2012-10-16 Tom de Vries <tom@codesourcery.com>

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* expr.c (move_by_pieces, move_by_pieces_ninsns, can_store_by_pieces)
	(store_by_pieces_1): Don't enter loop when no more data is left.

From-SVN: r192514
This commit is contained in:
Tom de Vries 2012-10-16 20:32:45 +00:00 • committed by Tom de Vries
parent 7181e991b5
commit f841b68397
2 changed files with 9 additions and 4 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2012-10-16 Tom de Vries <tom@codesourcery.com>
* expr.c (move_by_pieces, move_by_pieces_ninsns, can_store_by_pieces)
(store_by_pieces_1): Don't enter loop when no more data is left.
2012-10-16 Joern Rennecke <joern.rennecke@embecosm.com>
* loop-doloop.c (doloop_modify): Pass doloop_end pattern to

8
gcc/expr.c
View file

@ -966,7 +966,7 @@ move_by_pieces (rtx to, rtx from, unsigned HOST_WIDE_INT len,
/* 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_WIDE_INT l, unsigned int align,
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_INT len,
{
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_pieces_d *data ATTRIBUTE_UNUSED,
/* 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);