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| author | Zdenek Dvorak <dvorakz@suse.cz> | 2005-07-12 01:59:17 +0200 |
|---|---|---|
| committer | Zdenek Dvorak <rakdver@gcc.gnu.org> | 2005-07-11 23:59:17 +0000 |
| commit | b7eae7b8d19f531d0ef3a1efb1fdacfdbc5bfc92 (patch) | |
| tree | 2dbef04c2f2db68628a4762f85cddb33c11d1be9 /gcc/tree-ssa-loop.c | |
| parent | 70028b61459cb2089d18bbd42d582c3411a9edfc (diff) | |
| download | gcc-b7eae7b8d19f531d0ef3a1efb1fdacfdbc5bfc92.zip gcc-b7eae7b8d19f531d0ef3a1efb1fdacfdbc5bfc92.tar.gz gcc-b7eae7b8d19f531d0ef3a1efb1fdacfdbc5bfc92.tar.bz2 | |
tree-flow.h (remove_empty_loops, [...]): Declare.
* tree-flow.h (remove_empty_loops, single_dom_exit): Declare.
* passes.c (init_optimization_passes): Add pass_empty_loop.
* tree-pass.h (pass_empty_loop): Declare.
* tree-ssa-loop-ivcanon.c (empty_loop_p, remove_empty_loop,
try_remove_empty_loop, remove_empty_loops): New functions.
* tree-ssa-loop-ivopts.c (single_dom_exit): Export.
* tree-ssa-loop.c (tree_ssa_empty_loop, pass_empty_loop): New.
* gcc.dg/tree-ssa/loop-10.c: New test.
From-SVN: r101901
Diffstat (limited to 'gcc/tree-ssa-loop.c')
| -rw-r--r-- | gcc/tree-ssa-loop.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/gcc/tree-ssa-loop.c b/gcc/tree-ssa-loop.c index aa99920..1e7d73b 100644 --- a/gcc/tree-ssa-loop.c +++ b/gcc/tree-ssa-loop.c @@ -311,6 +311,34 @@ struct tree_opt_pass pass_scev_cprop = 0 /* letter */ }; +/* Remove empty loops. */ + +static void +tree_ssa_empty_loop (void) +{ + if (!current_loops) + return; + + remove_empty_loops (current_loops); +} + +struct tree_opt_pass pass_empty_loop = +{ + "empty", /* name */ + NULL, /* gate */ + tree_ssa_empty_loop, /* execute */ + NULL, /* sub */ + NULL, /* next */ + 0, /* static_pass_number */ + TV_COMPLETE_UNROLL, /* tv_id */ + PROP_cfg | PROP_ssa, /* properties_required */ + 0, /* properties_provided */ + 0, /* properties_destroyed */ + 0, /* todo_flags_start */ + TODO_dump_func | TODO_verify_loops, /* todo_flags_finish */ + 0 /* letter */ +}; + /* Record bounds on numbers of iterations of loops. */ static void |