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| author | Richard Biener <rguenther@suse.de> | 2013-05-21 11:59:28 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2013-05-21 11:59:28 +0000 |
| commit | 4a61be9acc1e0a4d0258f47da59a1463a0e59b8d (patch) | |
| tree | 64fa28fa235f357870ff62e9ba5ee14e9f7713ad /gcc/tree-ssa-loop-ivcanon.c | |
| parent | c52da5f7d36d279d829adf384271c53e1ce87601 (diff) | |
| download | gcc-4a61be9acc1e0a4d0258f47da59a1463a0e59b8d.zip gcc-4a61be9acc1e0a4d0258f47da59a1463a0e59b8d.tar.gz gcc-4a61be9acc1e0a4d0258f47da59a1463a0e59b8d.tar.bz2 | |
re PR tree-optimization/57318 (optimizer takes several seconds on nested loops)
2013-05-21 Richard Biener <rguenther@suse.de>
PR tree-optimization/57318
* tree-ssa-loop-ivcanon.c (tree_estimate_loop_size): Do not
estimate stmts with side-effects as likely eliminated.
From-SVN: r199140
Diffstat (limited to 'gcc/tree-ssa-loop-ivcanon.c')
| -rw-r--r-- | gcc/tree-ssa-loop-ivcanon.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/tree-ssa-loop-ivcanon.c b/gcc/tree-ssa-loop-ivcanon.c index b5751cb..45774e6 100644 --- a/gcc/tree-ssa-loop-ivcanon.c +++ b/gcc/tree-ssa-loop-ivcanon.c @@ -257,8 +257,10 @@ tree_estimate_loop_size (struct loop *loop, edge exit, edge edge_to_cancel, stru /* Look for reasons why we might optimize this stmt away. */ + if (gimple_has_side_effects (stmt)) + ; /* Exit conditional. */ - if (exit && body[i] == exit->src + else if (exit && body[i] == exit->src && stmt == last_stmt (exit->src)) { if (dump_file && (dump_flags & TDF_DETAILS)) |