[PATCH] D80791: [AArch64] Generate .note.gnu.property based on module flags.

[Daniel Kiss via Phabricator via cfe-commits]

danielkiss created this revision.
danielkiss added reviewers: tamas.petz, chill.
Herald added subscribers: llvm-commits, cfe-commits, hiraditya, kristof.beyls.
Herald added projects: clang, LLVM.

Generate .note.gnu.property for PAC and BTI if the compile unit is
compiled with -mbranch-protection. 
It is valid use case to have a non-bti protected function therefore the note shouldn't be
removed in that case. In this case only the direct call is valid to the function.
This behaviour matches with gcc.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D80791

Files:
  clang/lib/CodeGen/CodeGenModule.cpp
  llvm/lib/Target/AArch64/AArch64AsmPrinter.cpp
  llvm/test/CodeGen/AArch64/note-gnu-property-pac-bti-0.ll
  llvm/test/CodeGen/AArch64/note-gnu-property-pac-bti-1.ll
  llvm/test/CodeGen/AArch64/note-gnu-property-pac-bti-2.ll
  llvm/test/CodeGen/AArch64/note-gnu-property-pac-bti-3.ll
  llvm/test/CodeGen/AArch64/note-gnu-property-pac-bti-4.ll
  llvm/test/CodeGen/AArch64/note-gnu-property-pac-bti-5.ll
  llvm/test/CodeGen/AArch64/note-gnu-property-pac-bti-6.ll
  llvm/test/CodeGen/AArch64/note-gnu-property-pac-bti-7.ll
  llvm/test/CodeGen/AArch64/note-gnu-property-pac-bti-8.ll

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