dse.c (find_shift_sequence): Reinstate "<= UNITS_PER_WORD" condition.

gcc/
	* dse.c (find_shift_sequence): Reinstate "<= UNITS_PER_WORD" condition.
	* var-tracking.c (micro_operation_def): Update comment on u.loc.
	(mode_for_reg_attrs, var_lowpart): New functions.
	(add_uses): Consider recording a lowpart of LOC for MO_USE.
	(add_stores): Likewise MO_SET and MO_COPY.  If the source of a set
	or copy is known, set LOC to the SET that performs the set, instead
	of the destination.
	(find_src_status, find_src_set_src): Remove LOC parameter.
	Replace INSN with the source value.
	(compute_bb_dataflow, emit_notes_in_bb): Check for a SET u.loc when
	handling MO_SET and MO_COPY.  Update the calls to find_src_status
	and find_src_set_src.

From-SVN: r129269

1 files changed, 1 insertions, 1 deletions

diff --git a/gcc/dse.c b/gcc/dse.c
index c5e8e26..a5244e11 100644
--- a/gcc/dse.c
+++ b/gcc/dse.c
@@ -1415,7 +1415,7 @@ find_shift_sequence (rtx read_reg,
      justify the value we want to read but is available in one insn on
      the machine.  */
 
-  for (; access_size < UNITS_PER_WORD; access_size *= 2)
+  for (; access_size <= UNITS_PER_WORD; access_size *= 2)
     {
       rtx target, new_reg, shift_seq, insn;
       enum machine_mode new_mode;