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7070134: Hotspot crashes with sigsegv from PorterStemmer

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Do not move data nodes which are attached to a predicate test to a dominating test.

Reviewed-by: never
This commit is contained in:
Vladimir Kozlov 2011-07-26 19:35:23 -07:00
parent 48c1293916
commit dd43791e4a
7 changed files with 97677 additions and 7 deletions
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6
hotspot/src/share/vm/opto/loopPredicate.cpp
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@ -817,6 +817,10 @@ bool PhaseIdealLoop::loop_predication_impl(IdealLoopTree *loop) {
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 @@ bool PhaseIdealLoop::loop_predication_impl(IdealLoopTree *loop) {
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);