[PATCH] D118301: [Spill2Reg] Added x86 profitability model.

[Vasileios Porpodas via Phabricator via llvm-commits]

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This is a simple model for checking when Spill2Reg is profitable in x86.
It walks through instructions in the proximity of the spill or reload and
counts the number of memory and vector instructions. If the count of
memory instructions is greater than a threshold and the count of vector
instructions less than a threshold, then we consider it to be profitable.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D118301

Files:
  llvm/include/llvm/CodeGen/TargetInstrInfo.h
  llvm/lib/Target/X86/X86InstrInfo.cpp
  llvm/lib/Target/X86/X86InstrInfo.h

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