[PATCH] D22719: MachineFunction: Introduce NoPHIs property

[Matthias Braun via llvm-commits]

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I want to compute the SSA property of .mir files automatically in
an upcoming patch. The problem with this is that some inputs will be
reported as static single assignment and some passes subsequently reject them.
In reality though those passes have no problem with register only being assigned once but they do not support PHI
instructions.
So we track the presence of PHI instructions separate from the SSA property.

Repository:
  rL LLVM

https://reviews.llvm.org/D22719

Files:
  include/llvm/CodeGen/MachineFunction.h
  lib/CodeGen/MIRParser/MIRParser.cpp
  lib/CodeGen/MachineFunction.cpp
  lib/CodeGen/MachineVerifier.cpp
  lib/CodeGen/PHIElimination.cpp
  lib/CodeGen/RegAllocBase.cpp
  lib/CodeGen/RegAllocFast.cpp
  lib/Target/AMDGPU/SILoadStoreOptimizer.cpp
  test/CodeGen/AArch64/arm64-misched-multimmo.ll

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