Mercurial > hg > truffle
diff src/share/vm/opto/loopPredicate.cpp @ 3840:4e761e7e6e12
7070134: Hotspot crashes with sigsegv from PorterStemmer
Summary: Do not move data nodes which are attached to a predicate test to a dominating test.
Reviewed-by: never
| author | kvn |
|---|---|
| date | Tue, 26 Jul 2011 19:35:23 -0700 |
| parents | bad7ecd0b6ed |
| children | c96c3eb1efae |
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--- a/src/share/vm/opto/loopPredicate.cpp Thu Jul 21 11:25:07 2011 -0700 +++ b/src/share/vm/opto/loopPredicate.cpp Tue Jul 26 19:35:23 2011 -0700 @@ -817,6 +817,10 @@ cl = head->as_CountedLoop(); // do nothing for iteration-splitted loops if (!cl->is_normal_loop()) return false; + // Avoid RCE if Counted loop's test is '!='. + BoolTest::mask bt = cl->loopexit()->test_trip(); + if (bt != BoolTest::lt && bt != BoolTest::gt) + cl = NULL; } Node* entry = head->in(LoopNode::EntryControl); @@ -958,7 +962,7 @@ if (TraceLoopPredicate) tty->print_cr("lower bound check if: %d", lower_bound_iff->_idx); // Test the upper bound - Node* upper_bound_bol = rc_predicate(loop, ctrl, scale, offset, init, limit, stride, rng, true); + Node* upper_bound_bol = rc_predicate(loop, lower_bound_proj, scale, offset, init, limit, stride, rng, true); IfNode* upper_bound_iff = upper_bound_proj->in(0)->as_If(); _igvn.hash_delete(upper_bound_iff); upper_bound_iff->set_req(1, upper_bound_bol);