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7043552: regression after 7042327

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Generate Opaque2 node only during first unroll.

Reviewed-by: never
This commit is contained in:
Vladimir Kozlov 2011-05-10 12:57:21 -07:00
parent fee8d7fca4
commit 70dfd21e87
1 changed files with 1 additions and 1 deletions
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2
hotspot/src/share/vm/opto/loopTransform.cpp
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@ -1230,7 +1230,7 @@ void PhaseIdealLoop::do_unroll( IdealLoopTree *loop, Node_List &old_new, bool ad
set_ctrl(new_limit, C->root());
} else {
// Limit is not constant.
{
if (loop_head->unrolled_count() == 1) { // only for first unroll
// Separate limit by Opaque node in case it is an incremented
// variable from previous loop to avoid using pre-incremented
// value which could increase register pressure.