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Kai Luo
aa4508e98a
[MachineCSE][MachinePRE] Avoid hoisting code from code regions into hot BBs.
Summary: Current PRE hoists common computations into CMBB = DT->findNearestCommonDominator(MBB, MBB1). However, if CMBB is in a hot loop body, we might get performance degradation. Differential Revision: https://reviews.llvm.org/D64394 llvm-svn: 366570
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