Hi!
I've bootstrapped/regtested and profiledbootstrapped/regtested
the following patch from Zdenek on x86_64-linux and i686-linux
and with richi's approval from IRC committed to trunk.
2011-03-07 Zdenek Dvorak <o...@ucw.cz>
PR bootstrap/48000
* cfgloopmanip.c (fix_bb_placements): Return immediately
if FROM is BASE_LOOP's header.
--- gcc/cfgloopmanip.c (revision 170739)
+++ gcc/cfgloopmanip.c (working copy)
@@ -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);
Jakub
