[all-commits] [llvm/llvm-project] 514691: [ConstantFolding] Fix incorrect nvvm_round folding...

[Lewis Crawford via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 51469174074b478e7a5fe0f8c69452b1d6752e30
      https://github.com/llvm/llvm-project/commit/51469174074b478e7a5fe0f8c69452b1d6752e30
  Author: Lewis Crawford <lcrawford at nvidia.com>
  Date:   2025-08-01 (Fri, 01 Aug 2025)

  Changed paths:
    M llvm/lib/Analysis/ConstantFolding.cpp
    M llvm/test/Transforms/InstSimplify/const-fold-nvvm-unary-arithmetic.ll

  Log Message:
  -----------
  [ConstantFolding] Fix incorrect nvvm_round folding (#151563)

The `nvvm_round` intrinsic should round to the nearest even number in
the case of ties. It lowers to PTX `cvt.rni`, which will "round to
nearest integer, choosing even integer if source is equidistant between
two integers", so it matches the semantics of `rint` (and not `round` as
the name suggests).



To unsubscribe from these emails, change your notification settings at https://github.com/llvm/llvm-project/settings/notifications