diff options
Diffstat (limited to 'gcc/cfgloopmanip.c')
| -rw-r--r-- | gcc/cfgloopmanip.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/cfgloopmanip.c b/gcc/cfgloopmanip.c index 3802f9cff12..1824421f616 100644 --- a/gcc/cfgloopmanip.c +++ b/gcc/cfgloopmanip.c @@ -185,7 +185,11 @@ fix_bb_placements (basic_block from, fix_loop_placement. */ base_loop = from->loop_father; - if (base_loop == current_loops->tree_root) + /* If we are already in the outermost loop, the basic blocks cannot be moved + outside of it. If FROM is the header of the base loop, it cannot be moved + outside of it, either. In both cases, we can end now. */ + if (base_loop == current_loops->tree_root + || from == base_loop->header) return; in_queue = sbitmap_alloc (last_basic_block); |