[all-commits] [llvm/llvm-project] a4ec04: [AArch64][SME2] Add ZT0 attributes to SMEAttrs (#7...

[Kerry McLaughlin via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: a4ec04ea77afa8fb6c08fe8f77c664c95a5eb62e
      https://github.com/llvm/llvm-project/commit/a4ec04ea77afa8fb6c08fe8f77c664c95a5eb62e
  Author: Kerry McLaughlin <kerry.mclaughlin at arm.com>
  Date:   2024-01-16 (Tue, 16 Jan 2024)

  Changed paths:
    M llvm/lib/IR/Verifier.cpp
    M llvm/lib/Target/AArch64/Utils/AArch64SMEAttributes.cpp
    M llvm/lib/Target/AArch64/Utils/AArch64SMEAttributes.h
    M llvm/test/Verifier/sme-attributes.ll
    M llvm/unittests/Target/AArch64/SMEAttributesTest.cpp

  Log Message:
  -----------
  [AArch64][SME2] Add ZT0 attributes to SMEAttrs (#77607)

This patch extends SMEAttrs to interpret the following new attributes,
which are mutually exclusive and apply to SME2 only:
  - aarch64_sme_zt0_in (ZT0_In)
  - aarch64_sme_zt0_out (ZT0_Out)
  - aarch64_sme_zt0_inout (ZT0_InOut)
  - aarch64_sme_zt0_new (ZT0_New)
  - aarch64_sme_zt0_preserved (ZT0_Preserved)

ZT0_In, ZT0_Out, ZT0_InOut & ZT0_Preserved are all considered to share
ZT0. These attributes will be required by later patches to determine
if ZT0 should be preserved around function calls, or cleared on entry
to the function.