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47bce43229
of the problems with my last attempt were in the updating of LiveIntervals rather than the coalescing itself. Therefore, I decided to get that right first by essentially reimplementing the existing PHIElimination using LiveIntervals. It works correctly, with only a few tests failing (which may not be legitimate failures) and no new verifier failures (at least as far as I can tell, I didn't count the number per file). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122321 91177308-0d34-0410-b5e6-96231b3b80d8
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