[all-commits] [llvm/llvm-project] 16daaf: [AArch64] Try to combine MULL with uzp1.

[JinGu Kang via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 16daaf0887f9579bfaf0ffd18838504ad28cb25b
      https://github.com/llvm/llvm-project/commit/16daaf0887f9579bfaf0ffd18838504ad28cb25b
  Author: Jingu Kang <jingu.kang at arm.com>
  Date:   2023-06-13 (Tue, 13 Jun 2023)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/test/CodeGen/AArch64/aarch64-smull.ll

  Log Message:
  -----------
  [AArch64] Try to combine MULL with uzp1.

For example,

 smull(trunc(x), extract_high(y))
 ==>
 smull(extract_high(uzp1(undef,x)), extract_high(y))

 -> It will be matched to smull2

Differential Revision: https://reviews.llvm.org/D150969