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| author | Zdenek Dvorak <dvorakz@suse.cz> | 2007-04-09 08:51:43 +0200 |
|---|---|---|
| committer | Zdenek Dvorak <rakdver@gcc.gnu.org> | 2007-04-09 06:51:43 +0000 |
| commit | c7b852c8a60d46ba79c50b9d2a4f3cba4847c896 (patch) | |
| tree | f5af72013d20563b8340bcf3462e935b8ad07bef /gcc/tree-cfgcleanup.c | |
| parent | 782c9150c34a05791f425af5af81c8198cf49176 (diff) | |
| download | gcc-c7b852c8a60d46ba79c50b9d2a4f3cba4847c896.zip gcc-c7b852c8a60d46ba79c50b9d2a4f3cba4847c896.tar.gz gcc-c7b852c8a60d46ba79c50b9d2a4f3cba4847c896.tar.bz2 | |
cfgloopmanip.c (create_preheader): Do not use loop_preheader_edge.
* cfgloopmanip.c (create_preheader): Do not use loop_preheader_edge.
(create_preheaders): Check that loops are available.
(fix_loop_structure): Clean up, improve comments.
* tree-ssa-loop-manip.c (rewrite_into_loop_closed_ssa):
Check that loops are available. Set LOOP_CLOSED_SSA to the loops
state flags.
* tree-scalar-evolution.c (scev_finalize): Clear scalar_evolution_info.
* predict.c (tree_estimate_probability): Do not call
calculate_dominance_info. Call create_preheaders.
* tree-cfgcleanup.c (cleanup_tree_cfg_loop): Only call
rewrite_into_loop_closed_ssa if LOOP_CLOSED_SSA is set in loops state
flags.
* cfgloop.c (loop_preheader_edge): Assert that loops have preheaders.
* cfgloop.h (LOOP_CLOSED_SSA): New constant.
* tree-cfg.c (tree_split_edge): Make an assert more precise.
* tree-ssa-threadedge.c (thread_across_edge): Comment the function
arguments.
From-SVN: r123670
Diffstat (limited to 'gcc/tree-cfgcleanup.c')
| -rw-r--r-- | gcc/tree-cfgcleanup.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/gcc/tree-cfgcleanup.c b/gcc/tree-cfgcleanup.c index 8cf66cb..39dcfe7 100644 --- a/gcc/tree-cfgcleanup.c +++ b/gcc/tree-cfgcleanup.c @@ -599,7 +599,7 @@ cleanup_tree_cfg_loop (void) { bool changed = cleanup_tree_cfg (); - if (changed) + if (changed && current_loops != NULL) { bitmap changed_bbs = BITMAP_ALLOC (NULL); calculate_dominance_info (CDI_DOMINATORS); @@ -608,7 +608,8 @@ cleanup_tree_cfg_loop (void) /* This usually does nothing. But sometimes parts of cfg that originally were inside a loop get out of it due to edge removal (since they become unreachable by back edges from latch). */ - rewrite_into_loop_closed_ssa (changed_bbs, TODO_update_ssa); + if ((current_loops->state & LOOP_CLOSED_SSA) != 0) + rewrite_into_loop_closed_ssa (changed_bbs, TODO_update_ssa); BITMAP_FREE (changed_bbs); |