[PATCH] D30914: [Outliner] Add outliner for AArch64

[Jessica Paquette via Phabricator via llvm-commits]

paquette created this revision.
Herald added a subscriber: aemerson.

This patch adds an outliner for AArch64. It adds the outliner target hooks to AArch64InstrInfo.cpp and AArch64InstrInfo.cpp. This allows for outlining using the -mno-red-zone and -enable-machine-outliner flags.

The main difference from the X86-64 outliner is the inclusion of post-outlining stack fixups. A function, getPostOutliningFixup is added to determine if an instruction that uses SP can be fixed up post-outlining. After each outlined function is created, fixupPostOutline is called on the MachineBasicBlock in that function, and recalculates stack offsets using getPostOutliningFixup.

For a simpler example of how this works, see https://reviews.llvm.org/D30797


https://reviews.llvm.org/D30914

Files:
  lib/Target/AArch64/AArch64InstrInfo.cpp
  lib/Target/AArch64/AArch64InstrInfo.h
  test/CodeGen/AArch64/machine-outliner.ll

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