[PATCH] D152859: [MemorySSA] Always perform MemoryUses liveOnEntry optimization on MSSA construction

[Arthur Eubanks via Phabricator via llvm-commits]

aeubanks created this revision.
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Fixes invariant memory regressions in future DSE patches.

Also add a flag to print<memoryssa> to not ensure optimized uses to test this.

Noticeable compile time regression [1], but a future DSE change that depends on this more than makes up for it.

[1] https://llvm-compile-time-tracker.com/compare.php?from=eb3d21be37c0b51d8e105a8c563626dd2b7e547d&to=5650772b87950a95dffd183e02368debb1056f99&stat=instructions:u


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D152859

Files:
  llvm/include/llvm/Analysis/MemorySSA.h
  llvm/lib/Analysis/MemorySSA.cpp
  llvm/lib/Passes/PassBuilder.cpp
  llvm/lib/Passes/PassRegistry.def
  llvm/test/Analysis/MemorySSA/tbaa.ll

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