[all-commits] [llvm/llvm-project] cd4348: [VPlan] Sink cases where no truncate is needed in ...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: cd4348349a9dae6d61a3f7db0cb8d2ba2c0ad1c3
      https://github.com/llvm/llvm-project/commit/cd4348349a9dae6d61a3f7db0cb8d2ba2c0ad1c3
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2023-12-04 (Mon, 04 Dec 2023)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/test/Transforms/LoopVectorize/AArch64/deterministic-type-shrinkage.ll

  Log Message:
  -----------
  [VPlan] Sink cases where no truncate is needed in truncateMinimalBWs.

MinBWs contains entries that specify the minimum required bitwidth. In
some cases, the old and new bitwidths can be equal (see test case) and
in those cases no truncations are needed, so skip those cases.

Fixes #74307.