[all-commits] [llvm/llvm-project] 0dacba: [VPlan] Handle truncating ICMPs in truncateToMinim...

[Florian Hahn via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0dacba3ad1b5214ca35eda14987c0b76568a070e
      https://github.com/llvm/llvm-project/commit/0dacba3ad1b5214ca35eda14987c0b76568a070e
  Author: Florian Hahn <flo at fhahn.com>
  Date:   2024-02-16 (Fri, 16 Feb 2024)

  Changed paths:
    M llvm/lib/Transforms/Vectorize/VPlanTransforms.cpp
    M llvm/test/Transforms/LoopVectorize/trunc-reductions.ll

  Log Message:
  -----------
  [VPlan] Handle truncating ICMPs in truncateToMinimalBWs.

Update truncateToMinimalBitwidths to handle truncating ICMPs. For ICMPs,
the new target type will be the same as the original type. In that case,
only truncate the operands, but skip the extend. This is in line with
what the original truncateToMinimalBitwidths did for compares.

Fixes https://github.com/llvm/llvm-project/issues/81415.