[all-commits] [llvm/llvm-project] cb4f4a: [compiler-rt][AArch64] Rewrite SME routines to all...

[Sander de Smalen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: cb4f4a8a4dd18bf00604b49faadd7b0ee4394d3d
      https://github.com/llvm/llvm-project/commit/cb4f4a8a4dd18bf00604b49faadd7b0ee4394d3d
  Author: Sander de Smalen <sander.desmalen at arm.com>
  Date:   2024-12-11 (Wed, 11 Dec 2024)

  Changed paths:
    M compiler-rt/lib/builtins/CMakeLists.txt
    A compiler-rt/lib/builtins/aarch64/sme-abi-assert.c
    R compiler-rt/lib/builtins/aarch64/sme-abi-init.c
    M compiler-rt/lib/builtins/aarch64/sme-abi.S
    M compiler-rt/lib/builtins/cpu_model/aarch64.c
    A compiler-rt/lib/builtins/cpu_model/aarch64/fmv/baremetal.inc

  Log Message:
  -----------
  [compiler-rt][AArch64] Rewrite SME routines to all use __aarch64_cpu_features. (#119414)

When #92921 added the `__arm_get_current_vg` functionality, it used the
FMV feature bits mechanism rather than the mechanism that was previously
added for SME which called `getauxval` on Linux platforms or
`__aarch64_sme_accessible` required for baremetal libraries. It is
better to always use `__aarch64_cpu_features`.

For baremetal we still need to rely on `__arm_sme_accessible` to
initialise the struct.



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