[PATCH] D65817: [AArch64][WinCFI] Do not pair callee-save instructions in LoadStoreOptimizer

[Sander de Smalen via Phabricator via llvm-commits]

sdesmalen created this revision.
sdesmalen added reviewers: efriedma, mstorsjo, ssijaric.
Herald added subscribers: kristof.beyls, javed.absar.

Prevent the LoadStoreOptimizer from pairing any load/store instructions with instructions from
the prologue/epilogue if the CFI information has encoded the operations as separate instructions.
This would otherwise lead to a mismatch of the actual prologue size from the size as recorded
in the Windows CFI.


https://reviews.llvm.org/D65817

Files:
  lib/Target/AArch64/AArch64InstrInfo.cpp
  test/CodeGen/AArch64/wineh1.mir
  test/CodeGen/AArch64/wineh2.mir
  test/DebugInfo/COFF/AArch64/arm64-register-variables.ll

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