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comparison src/share/vm/opto/loopTransform.cpp @ 2417:cb162b348743

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7032696: Fix for 7029152 broke VM Summary: StrIntrinsicNode::Ideal() should not optimize memory during Parse. Reviewed-by: jrose, never
author kvn
date Thu, 31 Mar 2011 13:22:34 -0700
parents f9424955eb18
children 1d1603768966 08eb13460b3a
comparison
equal deleted inserted replaced
2416:38fea01eb669 2417:cb162b348743
429 assert( (intx)unroll_limit == LoopUnrollLimit * 4, "LoopUnrollLimit must fit in 32bits"); 429 assert( (intx)unroll_limit == LoopUnrollLimit * 4, "LoopUnrollLimit must fit in 32bits");
430 cl->set_trip_count(trip_count); 430 cl->set_trip_count(trip_count);
431 if (trip_count > unroll_limit || body_size > unroll_limit) { 431 if (trip_count > unroll_limit || body_size > unroll_limit) {
432 return false; 432 return false;
433 } 433 }
434
435 // Currently we don't have policy to optimize one iteration loops.
436 // Maximally unrolling transformation is used for that:
437 // it is peeled and the original loop become non reachable (dead).
438 if (trip_count == 1)
439 return true;
434 440
435 // Do not unroll a loop with String intrinsics code. 441 // Do not unroll a loop with String intrinsics code.
436 // String intrinsics are large and have loops. 442 // String intrinsics are large and have loops.
437 for (uint k = 0; k < _body.size(); k++) { 443 for (uint k = 0; k < _body.size(); k++) {
438 Node* n = _body.at(k); 444 Node* n = _body.at(k);