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| author | Richard Guenther <rguenther@suse.de> | 2010-02-27 23:28:46 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2010-02-27 23:28:46 +0000 |
| commit | 30bc1dca9c5a4af7b631bda879a200853a54dcfa (patch) | |
| tree | 0216165e214b4aecd783ed93348bd6396edb33ee /gcc/tree-ssa-loop-ivcanon.c | |
| parent | 812be315ca9acfb503d125bd16be043849be2c77 (diff) | |
| download | gcc-30bc1dca9c5a4af7b631bda879a200853a54dcfa.zip gcc-30bc1dca9c5a4af7b631bda879a200853a54dcfa.tar.gz gcc-30bc1dca9c5a4af7b631bda879a200853a54dcfa.tar.bz2 | |
re PR tree-optimization/43186 (A loop in tree_unroll_loops_completely never ends)
2010-02-27 Richard Guenther <rguenther@suse.de>
PR tree-optimization/43186
* params.def (PARAM_MAX_UNROLL_ITERATIONS): New param.
* doc/invoke.texi (max-completely-peel-loop-nest-depth): Document.
* tree-ssa-loop-ivcanon.c (tree_unroll_loops_completely): Limit
unroller iterations.
* gcc.c-torture/compile/pr43186.c: Adjust testcase.
From-SVN: r157114
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 df48dfd..e9841f5 100644 --- a/gcc/tree-ssa-loop-ivcanon.c +++ b/gcc/tree-ssa-loop-ivcanon.c @@ -522,6 +522,7 @@ tree_unroll_loops_completely (bool may_increase_size, bool unroll_outer) struct loop *loop; bool changed; enum unroll_level ul; + int iteration = 0; do { @@ -554,7 +555,8 @@ tree_unroll_loops_completely (bool may_increase_size, bool unroll_outer) scev_reset (); } } - while (changed); + while (changed + && ++iteration <= PARAM_VALUE (PARAM_MAX_UNROLL_ITERATIONS)); return 0; } |