[PATCH] Avoid unnecessary block copying in path splitting
* gimple-ssa-split-paths.c (split_paths): Avoid unnecessary block copying. From-SVN: r231915
This commit is contained in:
parent
5634394598
commit
9edb6bb8d3
|
@ -1,3 +1,8 @@
|
|||
2015-12-22 Jeff Law <law@redhat.com>
|
||||
|
||||
* gimple-ssa-split-paths.c (split_paths): Avoid unnecessary block
|
||||
copying.
|
||||
|
||||
2015-12-22 Jakub Jelinek <jakub@redhat.com>
|
||||
|
||||
PR c++/67376
|
||||
|
|
|
@ -192,9 +192,10 @@ split_paths ()
|
|||
|
||||
/* BB is the merge point for an IF-THEN-ELSE we want to transform.
|
||||
|
||||
Essentially we want to create two duplicates of BB and append
|
||||
a duplicate to the THEN and ELSE clauses. This will split the
|
||||
path leading to the latch. BB will be unreachable and removed. */
|
||||
Essentially we want to create a duplicate of bb and redirect the
|
||||
first predecessor of BB to the duplicate (leaving the second
|
||||
predecessor as is. This will split the path leading to the latch
|
||||
re-using BB to avoid useless copying. */
|
||||
if (bb && is_feasible_trace (bb))
|
||||
{
|
||||
if (dump_file && (dump_flags & TDF_DETAILS))
|
||||
|
@ -202,9 +203,7 @@ split_paths ()
|
|||
"Duplicating join block %d into predecessor paths\n",
|
||||
bb->index);
|
||||
basic_block pred0 = EDGE_PRED (bb, 0)->src;
|
||||
basic_block pred1 = EDGE_PRED (bb, 1)->src;
|
||||
transform_duplicate (pred0, bb);
|
||||
transform_duplicate (pred1, bb);
|
||||
changed = true;
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue