[all-commits] [llvm/llvm-project] 02df03: [AArch64][SME] Add support for arm_locally_streami...

[sdesmalen-arm via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 02df03c5b7ae9fa2e8b55369dd5ebd3871a60017
      https://github.com/llvm/llvm-project/commit/02df03c5b7ae9fa2e8b55369dd5ebd3871a60017
  Author: Sander de Smalen <sander.desmalen at arm.com>
  Date:   2022-10-14 (Fri, 14 Oct 2022)

  Changed paths:
    M llvm/include/llvm/CodeGen/SelectionDAG.h
    M llvm/lib/CodeGen/SelectionDAG/InstrEmitter.cpp
    M llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AArch64/AArch64InstrInfo.cpp
    M llvm/test/CodeGen/AArch64/sme-get-pstatesm.ll
    A llvm/test/CodeGen/AArch64/sme-streaming-body.ll
    M llvm/test/CodeGen/AArch64/sve-fixed-length-frame-offests.ll
    M llvm/test/CodeGen/AMDGPU/sdag-print-divergence.ll
    M llvm/test/CodeGen/X86/callbr-asm-bb-exports.ll
    M llvm/test/CodeGen/X86/merge-store-partially-alias-loads.ll
    M llvm/test/tools/UpdateTestChecks/update_llc_test_checks/Inputs/amdgpu_isel.ll.expected
    M llvm/test/tools/UpdateTestChecks/update_llc_test_checks/Inputs/lanai_isel.ll.expected
    M llvm/test/tools/UpdateTestChecks/update_llc_test_checks/Inputs/x86_isel.ll.expected

  Log Message:
  -----------
  [AArch64][SME] Add support for arm_locally_streaming functions.

Functions with `aarch64_sme_pstatesm_body` will emit a SMSTART at the start
of the function, and a SMSTOP at the end of the function, such that all
operations use the right value for vscale.

Because the placement of these nodes is critically important (i.e. no
vscale-dependent operations should be done before SMSTART has been issued),
we require glueing the CopyFromReg to the Entry node such that we can
insert the SMSTART as part of that glued chain.

More details about the SME attributes and design can be found
in D131562.

Reviewed By: aemerson

Differential Revision: https://reviews.llvm.org/D131582