[all-commits] [llvm/llvm-project] 9e6020: LAA cannot vectorize lib calls like modf/modff

[Paschalis Mpeis via All-commits]

  Branch: refs/heads/users/paschalis-mpeis/laa-vectorize-modf
  Home:   https://github.com/llvm/llvm-project
  Commit: 9e6020071d90decae5d61eced320a3f114b9d2a1
      https://github.com/llvm/llvm-project/commit/9e6020071d90decae5d61eced320a3f114b9d2a1
  Author: Paschalis Mpeis <Paschalis.Mpeis at arm.com>
  Date:   2024-01-23 (Tue, 23 Jan 2024)

  Changed paths:
    A clang/test/CodeGen/aarch64-veclib-function-calls-linear-ptrs.c

  Log Message:
  -----------
  LAA cannot vectorize lib calls like modf/modff

Functions like modf/modff are math lib calls that set memory write-only
attribute. Given that a target has vectorized mappings, LAA should allow
vectorization.


  Commit: 97ebe120a9971903ed2aacd03db3fccd35452a30
      https://github.com/llvm/llvm-project/commit/97ebe120a9971903ed2aacd03db3fccd35452a30
  Author: Paschalis Mpeis <Paschalis.Mpeis at arm.com>
  Date:   2024-01-23 (Tue, 23 Jan 2024)

  Changed paths:
    M clang/test/CodeGen/aarch64-veclib-function-calls-linear-ptrs.c
    M llvm/lib/Analysis/LoopAccessAnalysis.cpp

  Log Message:
  -----------
  [LV][LAA] Vectorize math lib calls with mem write-only attribute

Teach LAA to consider safe specific math lib calls which are known to
have set the memory write-only attribute. Those attributes are set to
calls by inferNonMandatoryLibFuncAttrs, in BuildLibCalls.cpp, and the
current ones are modf/modff and frexp/frexpf.

This happens only when the calls are found through TLI to have
vectorized counterparts.


  Commit: 4c59a94da22db24deb0211ddabd6fd7f7e217991
      https://github.com/llvm/llvm-project/commit/4c59a94da22db24deb0211ddabd6fd7f7e217991
  Author: Paschalis Mpeis <Paschalis.Mpeis at arm.com>
  Date:   2024-01-23 (Tue, 23 Jan 2024)

  Changed paths:
    M llvm/lib/Analysis/LoopAccessAnalysis.cpp

  Log Message:
  -----------
  Add check for the 'memory(argmem: write)' attribute.


  Commit: db90ef59ddcf8c0f40889bce0e4c6613d876cbcc
      https://github.com/llvm/llvm-project/commit/db90ef59ddcf8c0f40889bce0e4c6613d876cbcc
  Author: Paschalis Mpeis <Paschalis.Mpeis at arm.com>
  Date:   2024-01-23 (Tue, 23 Jan 2024)

  Changed paths:
    M clang/test/CodeGen/aarch64-veclib-function-calls-linear-ptrs.c
    M llvm/lib/Analysis/LoopAccessAnalysis.cpp

  Log Message:
  -----------
  Addressing reviewers


Compare: https://github.com/llvm/llvm-project/compare/1afad217bb9d...db90ef59ddcf