[PATCH] D77016: Change AArch64 Windows EH UnwindHelp object to be a fixed object

[Daniel Frampton via Phabricator via llvm-commits]

danielframpton created this revision.
danielframpton added reviewers: efriedma, rnk.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

The UnwindHelp object is used during exception handling by runtime code. It must be findable from a fixed offset from FP.

This change allocates the UnwindHelp object as a fixed object (as is done for x86_64) to ensure that both the generated code and runtime agree on the location of the object.

Fixes: https://bugs.llvm.org/show_bug.cgi?id=45346


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D77016

Files:
  llvm/lib/Target/AArch64/AArch64FrameLowering.cpp
  llvm/test/CodeGen/AArch64/seh-finally.ll
  llvm/test/CodeGen/AArch64/wineh-try-catch-cbz.ll
  llvm/test/CodeGen/AArch64/wineh-try-catch-realign.ll
  llvm/test/CodeGen/AArch64/wineh-try-catch.ll
  llvm/test/CodeGen/AArch64/wineh-unwindhelp-via-fp.ll

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