[all-commits] [llvm/llvm-project] 96f37a: [NFC] Use initial-stack-allocations for more data ...

[Jeremy Morse via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 96f37ae45310885e09195be09d9c05e1c1dff86b
      https://github.com/llvm/llvm-project/commit/96f37ae45310885e09195be09d9c05e1c1dff86b
  Author: Jeremy Morse <jeremy.morse at sony.com>
  Date:   2024-09-30 (Mon, 30 Sep 2024)

  Changed paths:
    M llvm/include/llvm/IR/Instructions.h
    M llvm/include/llvm/IR/Operator.h
    M llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp
    M llvm/lib/CodeGen/LiveDebugValues/InstrRefBasedImpl.h
    M llvm/lib/CodeGen/ScheduleDAGInstrs.cpp
    M llvm/lib/CodeGen/SelectionDAG/ScheduleDAGRRList.cpp
    M llvm/lib/IR/Instructions.cpp
    M llvm/lib/IR/Operator.cpp
    M llvm/lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp
    M llvm/lib/Transforms/AggressiveInstCombine/AggressiveInstCombine.cpp
    M llvm/lib/Transforms/IPO/AttributorAttributes.cpp
    M llvm/lib/Transforms/Scalar/ConstraintElimination.cpp
    M llvm/lib/Transforms/Scalar/GVN.cpp
    M llvm/lib/Transforms/Scalar/JumpTableToSwitch.cpp
    M llvm/lib/Transforms/Utils/Local.cpp
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/lib/Transforms/Vectorize/SLPVectorizer.cpp

  Log Message:
  -----------
  [NFC] Use initial-stack-allocations for more data structures (#110544)

This replaces some of the most frequent offenders of using a DenseMap that
cause a malloc, where the typical element-count is small enough to fit in
an initial stack allocation.

Most of these are fairly obvious, one to highlight is the collectOffset
method of GEP instructions: if there's a GEP, of course it's going to have
at least one offset, but every time we've called collectOffset we end up
calling malloc as well for the DenseMap in the MapVector.



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