[PATCH] D118298: [Spill2Reg] Initial commit. This is boilerplate code.

[Vasileios Porpodas via Phabricator via llvm-commits]

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This is the first commit for the Spill2Reg optimization pass.
The goal of this pass is to selectively replace spills to the stack with
spills to vector registers. This can help remove back-end stalls in x86.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D118298

Files:
  llvm/include/llvm/CodeGen/MachinePassRegistry.def
  llvm/include/llvm/CodeGen/Passes.h
  llvm/include/llvm/InitializePasses.h
  llvm/lib/CodeGen/CMakeLists.txt
  llvm/lib/CodeGen/CodeGen.cpp
  llvm/lib/CodeGen/Spill2Reg.cpp
  llvm/lib/CodeGen/TargetPassConfig.cpp

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