[all-commits] [llvm/llvm-project] 7a0f75: Reapply "[GVN] MemorySSA for GVN: add optional `Al...

[Antonio Frighetto via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 7a0f75c7385e971b84f05da2e48c138dc40f2b3b
      https://github.com/llvm/llvm-project/commit/7a0f75c7385e971b84f05da2e48c138dc40f2b3b
  Author: Antonio Frighetto <me at antoniofrighetto.com>
  Date:   2025-01-14 (Tue, 14 Jan 2025)

  Changed paths:
    M llvm/include/llvm/Transforms/Scalar/GVN.h
    M llvm/lib/Passes/PassBuilder.cpp
    M llvm/lib/Passes/PassRegistry.def
    M llvm/lib/Transforms/Scalar/GVN.cpp
    M llvm/test/Other/new-pm-print-pipeline.ll

  Log Message:
  -----------
  Reapply "[GVN] MemorySSA for GVN: add optional `AllowMemorySSA`"

Original commit: eb63cd62a4a1907dbd58f12660efd8244e7d81e9

Previously reverted due to non-negligible compile-time impact in
stage1-ReleaseLTO-g scenario. The issue has been addressed by
always reusing previously computed MemorySSA results, and request
new ones only when `isMemorySSAEnabled` is set.

Co-authored-by: Momchil Velikov <momchil.velikov at arm.com>



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