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And use it in MachineOptimizationRemarkEmitter. A test will follow on top of Justin's changes to enable MachineORE in AsmPrinter. The approach is similar to the IR-level pass. It's a bit simpler because BPI is immutable at the Machine level so we don't need to make that lazy. Because of this, a new function mapping is introduced (BPIPassTrait::getBPI). This function extracts BPI from the pass. In case of the lazy pass, this is when the calculation of the BFI occurs. For Machine-level, this is the identity function. Differential Revision: https://reviews.llvm.org/D29836 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@295072 91177308-0d34-0410-b5e6-96231b3b80d8
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