[PATCH] D95141: [InstCombine] Remove unused llvm.experimental.noalias.scope.decl

[Jeroen Dobbelaere via Phabricator via llvm-commits]

jeroen.dobbelaere updated this revision to Diff 318827.
jeroen.dobbelaere added a comment.

Use `NoAliasScopeDeclInst`. Only analyze non-debug instructions with metadata. (*1)

This seems to be faster than analyzing non-debug instruction that are reading or writing memory. (*2)

See https://llvm-compile-time-tracker.com/index.php?config=O3&stat=instructions&branch=dobbelaj-snps/perf/D95141_20210124_01 for some comparisons:

- *1 corresponds to: 374c7514b58d963cbab82341ad8383fcc89f588d
- *2 corresponds to: 26ed00968ed9925ead692dfd8a75bdf8dc4a3492


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D95141/new/

https://reviews.llvm.org/D95141

Files:
  llvm/lib/Transforms/InstCombine/InstructionCombining.cpp
  llvm/test/Transforms/Coroutines/coro-retcon-resume-values.ll
  llvm/test/Transforms/Coroutines/coro-retcon-value.ll
  llvm/test/Transforms/Coroutines/coro-retcon.ll
  llvm/test/Transforms/Coroutines/ex2.ll
  llvm/test/Transforms/Coroutines/ex3.ll
  llvm/test/Transforms/Coroutines/ex4.ll
  llvm/test/Transforms/InstCombine/noalias-scope-decl.ll
  llvm/test/Transforms/PhaseOrdering/inlining-alignment-assumptions.ll
  llvm/test/Transforms/PhaseOrdering/instcombine-sroa-inttoptr.ll

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