procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

tree-if-conv.c (process_phi_nodes): Process latch block.

Browse source 
* tree-if-conv.c (process_phi_nodes): Process latch block.
       (combine_blocks): Process latch block and update loop structure.

       * gcc.dg/pr17635.c : New test.

From-SVN: r89045
This commit is contained in:
Devang Patel 2004-10-14 11:19:47 -07:00 • committed by Devang Patel
parent 1399eca190
commit 0ecf0d5f41
3 changed files with 21 additions and 5 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
gcc/ChangeLog
View file

@ -1,3 +1,9 @@
2004-10-14 Devang Patel <dpatel@apple.com>
PR 17635
* tree-if-conv.c (process_phi_nodes): Process latch block.
(combine_blocks): Process latch block and update loop structure.
2004-10-14 Olga Golovanevsky <olga@il.ibm.com>
* tree-vectorizer.c (vect_generate_tmps_on_preheader):

5
gcc/testsuite/ChangeLog
View file

@ -1,3 +1,8 @@
2004-10-14 Devang Patel <dpatel@apple.com>
PR 17635
* gcc.dg/pr17635.c : New test.
2004-10-14 Olga GOlovanevsky <olga@il.ibm.com>
* testsuite/gcc.dg/vect/vect-28.c : Remove xfail.

15
gcc/tree-if-conv.c
View file

@ -815,7 +815,7 @@ process_phi_nodes (struct loop *loop)
basic_block true_bb = NULL;
bb = ifc_bbs[i];
if (bb == loop->header || bb == loop->latch)
if (bb == loop->header)
continue;
phi = phi_nodes (bb);
@ -863,9 +863,6 @@ combine_blocks (struct loop *loop)
bb = ifc_bbs[i];
if (bb == loop->latch)
continue;
if (!exit_bb && bb_with_exit_edge_p (bb))
exit_bb = bb;
@ -891,6 +888,9 @@ combine_blocks (struct loop *loop)
continue;
}
if (bb == loop->latch && empty_block_p (bb))
continue;
/* It is time to remove this basic block. First remove edges. */
while (EDGE_COUNT (bb->succs) > 0)
ssa_remove_edge (EDGE_SUCC (bb, 0));
@ -921,6 +921,8 @@ combine_blocks (struct loop *loop)
delete_from_dominance_info (CDI_POST_DOMINATORS, bb);
/* Remove basic block. */
if (bb == loop->latch)
loop->latch = merge_target_bb;
remove_bb_from_loops (bb);
expunge_block (bb);
}
@ -928,7 +930,10 @@ combine_blocks (struct loop *loop)
/* Now if possible, merge loop header and block with exit edge.
This reduces number of basic blocks to 2. Auto vectorizer addresses
loops with two nodes only. FIXME: Use cleanup_tree_cfg(). */
if (exit_bb != loop->latch && empty_block_p (loop->latch))
if (exit_bb
&& loop->header != loop->latch
&& exit_bb != loop->latch
&& empty_block_p (loop->latch))
{
if (can_merge_blocks_p (loop->header, exit_bb))
{