[PATCH] D88699: [AArch64] Allow pairing lr with other GPRs for WinCFI

[Martin Storsjö via Phabricator via llvm-commits]

mstorsjo created this revision.
mstorsjo added reviewers: efriedma, rnk, ssijaric, TomTan.
Herald added subscribers: danielkiss, hiraditya, kristof.beyls.
Herald added a project: LLVM.
mstorsjo requested review of this revision.

This saves one instruction per prologue/epilogue for any function with an odd number of callee-saved GPRs, but more importantly, allows such functions to match the packed unwind format.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D88699

Files:
  llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
  llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
  llvm/test/CodeGen/AArch64/win64_vararg.ll
  llvm/test/CodeGen/AArch64/wineh-save-lrpair1.mir
  llvm/test/CodeGen/AArch64/wineh-save-lrpair2.mir

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