[PATCH] D115690: [SystemZ] Implement orderFrameObjects().

[Jonas Paulsson via Phabricator via llvm-commits]

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By reordering the objects on the stack frame after looking at the users, a better utilization of displacement operands will result. This means less needed Load Address instructions for the loading/storing of those objects.

This is still a work in progress, but the new test case works where an LAY is eliminated.

(Inspired by X86FrameLowering::orderFrameObjects().)


https://reviews.llvm.org/D115690

Files:
  llvm/lib/Target/SystemZ/SystemZFrameLowering.cpp
  llvm/lib/Target/SystemZ/SystemZFrameLowering.h
  llvm/lib/Target/SystemZ/SystemZInstrInfo.cpp
  llvm/lib/Target/SystemZ/SystemZInstrInfo.h
  llvm/test/CodeGen/SystemZ/frame-27.mir

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