[PATCH] D90020: [AArch64][SVE] Emit DWARF location expression for SVE stack objects.

[Sander de Smalen via Phabricator via llvm-commits]

sdesmalen created this revision.
sdesmalen added reviewers: efriedma, aprantl, ctetreau, momchil.velikov.
Herald added subscribers: psnobl, hiraditya, kristof.beyls, tschuett.
Herald added a reviewer: rengolin.
Herald added a project: LLVM.
sdesmalen requested review of this revision.

Extend PEI to emit a DWARF expression for StackOffsets that have
a fixed and scalable component. This means the expression that needs
to be added is either:

  <base> + offset

or:

  <base> + offset + scalable_offset * scalereg

where for SVE, the scale reg is the Vector Granule Dwarf register, which
encodes the number of 64bit 'granules' in an SVE vector and which
the debugger can evaluate at runtime.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D90020

Files:
  llvm/include/llvm/CodeGen/TargetRegisterInfo.h
  llvm/include/llvm/IR/DebugInfoMetadata.h
  llvm/lib/CodeGen/PrologEpilogInserter.cpp
  llvm/lib/IR/DebugInfoMetadata.cpp
  llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
  llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
  llvm/lib/Target/AArch64/AArch64InstrInfo.h
  llvm/lib/Target/AArch64/AArch64RegisterInfo.cpp
  llvm/lib/Target/AArch64/AArch64RegisterInfo.h
  llvm/test/CodeGen/AArch64/debug-info-sve-dbg-value.mir

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