[all-commits] [llvm/llvm-project] ebe741: [DSE] Enable initializes improvement (#119116)

[Haopeng Liu via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: ebe741fad07e3fda388d0fa44f256a07429cce6a
      https://github.com/llvm/llvm-project/commit/ebe741fad07e3fda388d0fa44f256a07429cce6a
  Author: Haopeng Liu <153236845+haopliu at users.noreply.github.com>
  Date:   2024-12-10 (Tue, 10 Dec 2024)

  Changed paths:
    M llvm/lib/Transforms/Scalar/DeadStoreElimination.cpp

  Log Message:
  -----------
  [DSE] Enable initializes improvement (#119116)

Tested with an internal search backend loadtest.

With `-ftrivial-auto-var-init`, this work has a 0.2%-0.3% total QPS
improvement.

Note that, the metric is total QPS instead of cpu-time, even 1%
improvement means a lot.

- Add the "initializes" attr:
https://github.com/llvm/llvm-project/pull/97373
- Apply the attr to DSE:
https://github.com/llvm/llvm-project/pull/107282



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