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Diffstat (limited to 'gcc/tree-ssa-tail-merge.c')
| -rw-r--r-- | gcc/tree-ssa-tail-merge.c | 13 |
1 files changed, 1 insertions, 12 deletions
diff --git a/gcc/tree-ssa-tail-merge.c b/gcc/tree-ssa-tail-merge.c index f879871..20fbebf 100644 --- a/gcc/tree-ssa-tail-merge.c +++ b/gcc/tree-ssa-tail-merge.c @@ -1656,18 +1656,7 @@ tail_merge_optimize (unsigned int todo) int max_iterations = PARAM_VALUE (PARAM_MAX_TAIL_MERGE_ITERATIONS); if (!flag_tree_tail_merge - || max_iterations == 0 - /* We try to be conservative with respect to loop structure, since: - - the cases where tail-merging could both affect loop structure and be - beneficial are rare, - - it prevents us from having to fixup the loops using - loops_state_set (LOOPS_NEED_FIXUP), and - - keeping loop structure may allow us to simplify the pass. - In order to be conservative, we need loop information. In rare cases - (about 7 test-cases in the g++ testsuite) there is none (because - loop_optimizer_finalize has been called before tail-merge, and - PROP_loops is not set), so we bail out. */ - || current_loops == NULL) + || max_iterations == 0) return 0; timevar_push (TV_TREE_TAIL_MERGE); |