[all-commits] [llvm/llvm-project] 517334: [TableGen] Add maps from Write/ReadType to the par...

[Craig Topper via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 517334bdb83deaae3be6fbc4fa5f1d721b01c0f0
      https://github.com/llvm/llvm-project/commit/517334bdb83deaae3be6fbc4fa5f1d721b01c0f0
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   2025-01-22 (Wed, 22 Jan 2025)

  Changed paths:
    M llvm/utils/TableGen/Common/CodeGenSchedule.cpp
    M llvm/utils/TableGen/Common/CodeGenSchedule.h
    M llvm/utils/TableGen/SubtargetEmitter.cpp

  Log Message:
  -----------
  [TableGen] Add maps from Write/ReadType to the parent WriteRes/ReadAdvance. NFC (#123876)

Use this to improve performance of SubtargetEmitter::findWriteResources
and SubtargetEmitter::findReadAdvance. Now we can do a map lookup
instead of a linear search through all WriteRes/ReadAdvance records.
    
This reduces the build time of RISCVGenSubtargetInfo.inc on my
machine from 43 seconds to 10 seconds.



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