[PATCH] Cleanup register pressure calculation in MachineLICM

[Daniel Jasper]

Regression testing has revealed that there is actually one more distinction to be made to avoid functional changes in this refactoring: Whether to count unseen registers as defs. Now, there are no regressions in the LLVM test suite.


http://reviews.llvm.org/D8604

Files:
  lib/CodeGen/MachineLICM.cpp

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