[all-commits] [llvm/llvm-project] 39185d: [Clang][AArch64] Add missing SME/SVE2.1 feature ma...

[SpencerAbson via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 39185da16228efb4a09a30d6825a6f508c4755a3
      https://github.com/llvm/llvm-project/commit/39185da16228efb4a09a30d6825a6f508c4755a3
  Author: SpencerAbson <Spencer.Abson at arm.com>
  Date:   2024-07-19 (Fri, 19 Jul 2024)

  Changed paths:
    M clang/lib/Basic/Targets/AArch64.cpp
    M clang/lib/Basic/Targets/AArch64.h
    M clang/test/Preprocessor/aarch64-target-features.c

  Log Message:
  -----------
  [Clang][AArch64] Add missing SME/SVE2.1 feature macros (#98285)

The 2022 SME2.1and SVE2.1 feature macros are missing from Clang. Passing
'-target-feature +sve2p1' and 'target-feature +sme2p1' should prompt
Clang to define __ARM_FEATURE_SVE2p1 and __ARM_FEATURE_SME2p1
respectively, including their prerequisits..

This patch includes __ARM_FEATURE_SVE2p1 and __ARM_FEATURE_SME2p1, plus
a clang preprocessor test for each. It also ensures that the Clang macro
builder is used in a consistent fashion across Targets/AArch64.cpp.

The specification for SVE2.1 is documented in the latest (2024 Q1) ACLE
release: https://github.com/ARM-software/acle/releases . SME2p1 is not
yet featured in ACLE documentation but its features are described under
https://developer.arm.com/documentation/ddi0487/latest/



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