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

[Sander de Smalen via Phabricator via llvm-commits]

sdesmalen updated this revision to Diff 308691.
sdesmalen added a comment.

Refactored the patch so that DIExpression no longer exposes a possibility to hard-code a register. Instead this patch adds `TargetRegisterInfo::prependOffsetExpression`, which can be overridden by the target to generate an expression for a `StackOffset` if part of that offset is scalable (and thus needs a target-specific expression to describe the offset). For SVE it generates the expression manually in the form of a `SmallVector<uint64_t>` and prepends it to the given DIExpression. The default implementation in `TargetRegisterInfo` will use DIExpression::prepend() with a byte-sized offset.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D90020/new/

https://reviews.llvm.org/D90020

Files:
  llvm/include/llvm/CodeGen/TargetRegisterInfo.h
  llvm/lib/CodeGen/PrologEpilogInserter.cpp
  llvm/lib/CodeGen/TargetRegisterInfo.cpp
  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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