[all-commits] [llvm/llvm-project] 9a5bc7: [AArch64][SME] Remove SelectionDAG SME ABI lowerin...

[Benjamin Maxwell via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 9a5bc720257024b44cf9f4c63741be53c4fba4c2
      https://github.com/llvm/llvm-project/commit/9a5bc720257024b44cf9f4c63741be53c4fba4c2
  Author: Benjamin Maxwell <benjamin.maxwell at arm.com>
  Date:   2026-04-13 (Mon, 13 Apr 2026)

  Changed paths:
    M clang/test/CodeGen/AArch64/sme-remarks.c
    M llvm/docs/AArch64SME.rst
    M llvm/lib/IR/Verifier.cpp
    M llvm/lib/Target/AArch64/AArch64.h
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.h
    M llvm/lib/Target/AArch64/AArch64MachineFunctionInfo.h
    M llvm/lib/Target/AArch64/AArch64SMEAttributes.cpp
    M llvm/lib/Target/AArch64/AArch64SMEAttributes.h
    M llvm/lib/Target/AArch64/AArch64SMEInstrInfo.td
    M llvm/lib/Target/AArch64/AArch64TargetMachine.cpp
    M llvm/lib/Target/AArch64/AArch64TargetMachine.h
    M llvm/lib/Target/AArch64/CMakeLists.txt
    M llvm/lib/Target/AArch64/MachineSMEABIPass.cpp
    R llvm/lib/Target/AArch64/SMEABIPass.cpp
    M llvm/test/CodeGen/AArch64/aarch64-sme-za-call-lowering.ll
    M llvm/test/CodeGen/AArch64/sme-abi-save-call-remarks.ll
    M llvm/test/CodeGen/AArch64/sme-agnostic-za.ll
    M llvm/test/CodeGen/AArch64/sme-dynamic-tls.ll
    M llvm/test/CodeGen/AArch64/sme-lazy-save-call.ll
    M llvm/test/CodeGen/AArch64/sme-lazy-save-windows.ll
    M llvm/test/CodeGen/AArch64/sme-lazy-sve-nzcv-live.mir
    M llvm/test/CodeGen/AArch64/sme-new-za-function.ll
    R llvm/test/CodeGen/AArch64/sme-new-zt0-function.ll
    M llvm/test/CodeGen/AArch64/sme-peephole-opts.ll
    M llvm/test/CodeGen/AArch64/sme-shared-za-interface.ll
    M llvm/test/CodeGen/AArch64/sme-za-control-flow.ll
    M llvm/test/CodeGen/AArch64/sme-za-exceptions.ll
    M llvm/test/CodeGen/AArch64/sme-za-function-with-many-blocks.ll
    M llvm/test/CodeGen/AArch64/sme-za-lazy-save-buffer.ll
    M llvm/test/CodeGen/AArch64/sme-zt0-state.ll
    M llvm/test/CodeGen/AArch64/sve-stack-frame-layout.ll
    M llvm/test/Verifier/sme-attributes.ll
    M llvm/unittests/Target/AArch64/SMEAttributesTest.cpp
    M llvm/utils/gn/secondary/llvm/lib/Target/AArch64/BUILD.gn

  Log Message:
  -----------
  [AArch64][SME] Remove SelectionDAG SME ABI lowering (#190950)

This patch removes the `-aarch64-new-sme-abi=<true/false>` option (which
has been defaulted to "true" since LLVM 22), and removes the Selection
DAG lowering for the SME ABI.

There should be no functional changes for the default path
(`-aarch64-new-sme-abi=true`).



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