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from 3dbdbd2328e [X86] More correctly support LIG and WIG for EVEX instructi [...] new b76f989d6bc Add logic to greedy reg alloc to avoid bad eviction chains

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Summary of changes: include/llvm/CodeGen/CalcSpillWeights.h | 26 ++ include/llvm/CodeGen/LiveIntervalAnalysis.h | 5 + include/llvm/Target/TargetSubtargetInfo.h | 5 + lib/CodeGen/CalcSpillWeights.cpp | 65 +++- lib/CodeGen/LiveIntervalAnalysis.cpp | 8 +- lib/CodeGen/RegAllocGreedy.cpp | 356 ++++++++++++++++++++- lib/CodeGen/TargetSubtargetInfo.cpp | 4 + lib/Target/X86/X86Subtarget.h | 4 + test/CodeGen/X86/bug26810.ll | 312 ++++++++++++++++++ .../X86/greedy_regalloc_bad_eviction_sequence.ll | 116 +++++++ 10 files changed, 881 insertions(+), 20 deletions(-) create mode 100644 test/CodeGen/X86/bug26810.ll create mode 100644 test/CodeGen/X86/greedy_regalloc_bad_eviction_sequence.ll