Evan Cheng fad6287488 Refine r141689 with a tri-state variable.
Also teach MachineLICM to avoid "speculation" when register pressure is high.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@141744 91177308-0d34-0410-b5e6-96231b3b80d8
2011-10-11 23:48:44 +00:00
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2011-10-11 22:58:58 +00:00