[all-commits] [llvm/llvm-project] d3d77f: [EarlyCSE, TTI] Don't create new, unused, instructi...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: d3d77f71aaf46ec705abdf80db37725dd0c03659
      https://github.com/llvm/llvm-project/commit/d3d77f71aaf46ec705abdf80db37725dd0c03659
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2025-07-08 (Tue, 08 Jul 2025)

  Changed paths:
    M llvm/include/llvm/Analysis/TargetTransformInfo.h
    M llvm/include/llvm/Analysis/TargetTransformInfoImpl.h
    M llvm/lib/Analysis/TargetTransformInfo.cpp
    M llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
    M llvm/lib/Target/AArch64/AArch64TargetTransformInfo.h
    M llvm/lib/Transforms/Scalar/EarlyCSE.cpp
    M llvm/test/Transforms/EarlyCSE/AArch64/intrinsics.ll

  Log Message:
  -----------
  [EarlyCSE,TTI] Don't create new, unused, instructions. (#134534)

getOrCreateResultFromMemIntrinsic can modify the current function by
inserting new instructions without EarlyCSE keeping track of the
changes.

Introduce a new CanCreate argument, and update the function to only create
new instructions when CanCreate = true. Use it when appropriate.

Fixes https://github.com/llvm/llvm-project/issues/145183



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