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8059780: SPECjvm2008-MPEG performance regressions on x64 platforms

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Back-out 8052081 changes made in lcm.cpp.

Reviewed-by: iveresov, roland
This commit is contained in:
Vladimir Kozlov 2014-11-03 12:02:40 -08:00
parent 8152a3ea35
commit 8cd1a874e8
1 changed files with 2 additions and 6 deletions
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8
hotspot/src/share/vm/opto/lcm.cpp
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@ -464,9 +464,7 @@ Node* PhaseCFG::select(Block* block, Node_List &worklist, GrowableArray<int> &re
iop == Op_CreateEx || // Create-exception must start block
iop == Op_CheckCastPP
) {
// select the node n
// remove n from worklist and retain the order of remaining nodes
worklist.remove((uint)i);
worklist.map(i,worklist.pop());
return n;
}
@ -552,9 +550,7 @@ Node* PhaseCFG::select(Block* block, Node_List &worklist, GrowableArray<int> &re
assert(idx >= 0, "index should be set");
Node *n = worklist[(uint)idx]; // Get the winner
// select the node n
// remove n from worklist and retain the order of remaining nodes
worklist.remove((uint)idx);
worklist.map((uint)idx, worklist.pop()); // Compress worklist
return n;
}