[all-commits] [llvm/llvm-project] f9c01b: [LV] Fix '-1U' bits for smallest type in getSmalle...

[Sander de Smalen via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: f9c01b59e3d5239a4e42f94d5edbeb3698a81032
      https://github.com/llvm/llvm-project/commit/f9c01b59e3d5239a4e42f94d5edbeb3698a81032
  Author: Sander de Smalen <sander.desmalen at arm.com>
  Date:   2025-04-17 (Thu, 17 Apr 2025)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/smallest-and-widest-types.ll

  Log Message:
  -----------
  [LV] Fix '-1U' bits for smallest type in getSmallestAndWidestTypes (#135783)

For loops without loads/stores, where the smallest/widest types are
calculated from the reduction, the smallest type returned is always -1U
and it actually returns the smallest type as the widest type. This PR
fixes the calculation.

This follows from
https://github.com/llvm/llvm-project/pull/132190#discussion_r2044232607



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