[all-commits] [llvm/llvm-project] ebe741: [DSE] Enable initializes improvement (#119116)
Haopeng Liu via All-commits
all-commits at lists.llvm.org
Tue Dec 10 09:58:35 PST 2024
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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