[all-commits] [llvm/llvm-project] 3b485a: [AArch64] Mark known zero for high 16-bits of uadd...

[JinGu Kang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 3b485a6622cdf3a454a95c73614ba3cdc7299c01
      https://github.com/llvm/llvm-project/commit/3b485a6622cdf3a454a95c73614ba3cdc7299c01
  Author: Jingu Kang <jingu.kang at arm.com>
  Date:   2023-08-24 (Thu, 24 Aug 2023)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/neon-addlv.ll

  Log Message:
  -----------
  [AArch64] Mark known zero for high 16-bits of uaddlv intrinsic output with v8i8

The uaddlv with v8i8 returns 16-bits value but clang generates 32-bits intrinsic
and trunc for it. In this case, we can mark known zero for the high 16-bits of
the intrinsic output.

Differential Revision: