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tree-ssa-sink.c (sink_code_in_bb): Don't stop sinking after sinking the last stmt in a BB.

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* tree-ssa-sink.c (sink_code_in_bb): Don't stop sinking after
sinking the last stmt in a BB.

From-SVN: r128913
This commit is contained in:
Alexandre Oliva 2007-10-01 20:39:03 +00:00 committed by Alexandre Oliva
parent a64036a75c
commit 9a2875939a
2 changed files with 20 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2007-10-01 Alexandre Oliva <aoliva@redhat.com>
* tree-ssa-sink.c (sink_code_in_bb): Don't stop sinking after
sinking the last stmt in a BB.
2007-10-01 Alexandre Oliva <aoliva@redhat.com>
PR middle-end/22156

15
gcc/tree-ssa-sink.c
View File

@ -433,6 +433,7 @@ sink_code_in_bb (basic_block bb)
block_stmt_iterator bsi;
edge_iterator ei;
edge e;
bool last = true;
/* If this block doesn't dominate anything, there can't be any place to sink
the statements to. */
@ -454,6 +455,7 @@ sink_code_in_bb (basic_block bb)
{
if (!bsi_end_p (bsi))
bsi_prev (&bsi);
last = false;
continue;
}
if (dump_file)
@ -472,6 +474,19 @@ sink_code_in_bb (basic_block bb)
bsi_move_before (&bsi, &tobsi);
sink_stats.sunk++;
/* If we've just removed the last statement of the BB, the
bsi_end_p() test below would fail, but bsi_prev() would have
succeeded, and we want it to succeed. So we keep track of
whether we're at the last statement and pick up the new last
statement. */
if (last)
{
bsi = bsi_last (bb);
continue;
}
last = false;
if (!bsi_end_p (bsi))
bsi_prev (&bsi);