[all-commits] [llvm/llvm-project] 2bc6f9: [TableGen] Only store direct superclasses in Recor...

[Jay Foad via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 2bc6f9d4b6ff1d838f1c2d50cacbab6ba2f20bc9
      https://github.com/llvm/llvm-project/commit/2bc6f9d4b6ff1d838f1c2d50cacbab6ba2f20bc9
  Author: Jay Foad <jay.foad at amd.com>
  Date:   2025-04-24 (Thu, 24 Apr 2025)

  Changed paths:
    M clang/utils/TableGen/ClangAttrEmitter.cpp
    M clang/utils/TableGen/NeonEmitter.cpp
    M llvm/docs/TableGen/BackGuide.rst
    M llvm/include/llvm/TableGen/Record.h
    M llvm/lib/TableGen/DetailedRecordsBackend.cpp
    M llvm/lib/TableGen/JSONBackend.cpp
    M llvm/lib/TableGen/Record.cpp
    M llvm/lib/TableGen/SetTheory.cpp
    M llvm/lib/TableGen/TGParser.cpp
    M llvm/utils/TableGen/CallingConvEmitter.cpp
    M llvm/utils/TableGen/Common/CodeGenRegisters.cpp
    M llvm/utils/TableGen/SearchableTableEmitter.cpp
    M mlir/lib/Tools/tblgen-lsp-server/TableGenServer.cpp
    M mlir/tools/mlir-tblgen/OmpOpGen.cpp
    M mlir/tools/mlir-tblgen/SPIRVUtilsGen.cpp
    M mlir/tools/mlir-tblgen/TosaUtilsGen.cpp

  Log Message:
  -----------
  [TableGen] Only store direct superclasses in Record (#123072)

In Record only store the direct superclasses instead of all
superclasses. getSuperClasses recurses to find all superclasses when
necessary.

This gives a small reduction in memory usage. On lib/Target/X86/X86.td I
measured about 2.0% reduction in total bytes allocated (measured by
valgrind) and 1.3% reduction in peak memory usage (measured by
/usr/bin/time -v).

---------

Co-authored-by: Min-Yih Hsu <min at myhsu.dev>



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