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6221f41a5e
There were four almost identical implementations of calculating/updating the register pressure for a certain MachineInstr. Cleanup to have a single implementation (well, controlled with two bool flags until this is cleaned up more). No functional changes intended. Tested by verify that there are no binary changes in the entire llvm test-suite. A new test was added separately in r234309 as it revealed a pre-existing error in the register pressure calculation. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@234325 91177308-0d34-0410-b5e6-96231b3b80d8
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