[all-commits] [llvm/llvm-project] f5fcbe: [AArch64] Further restricts when a dup(*ext) can b...

[NickGuy-Arm via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: f5fcbe4e3c68584ef4858590a079f17593feabbd
      https://github.com/llvm/llvm-project/commit/f5fcbe4e3c68584ef4858590a079f17593feabbd
  Author: Nicholas Guy <nicholas.guy at arm.com>
  Date:   2021-01-18 (Mon, 18 Jan 2021)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    A llvm/test/CodeGen/AArch64/aarch64-dup-ext-crash.ll

  Log Message:
  -----------
  [AArch64] Further restricts when a dup(*ext) can be rearranged

In most cases, the dup(*ext) pattern can be rearranged to perform
the extension on the vector side, allowing for further vector-specific
optimisations to be made. However the initial checks for this conversion
were insufficient, allowing invalid encodings to be attempted (causing
compilation to fail).

Differential Revision: https://reviews.llvm.org/D94778


  Commit: 16bf02c3a19d4e1f4a19cb243de612e17f54f5a9
      https://github.com/llvm/llvm-project/commit/16bf02c3a19d4e1f4a19cb243de612e17f54f5a9
  Author: Nicholas Guy <nicholas.guy at arm.com>
  Date:   2021-01-18 (Mon, 18 Jan 2021)

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

  Log Message:
  -----------
  Reland "[AArch64] Attempt to sink mul operands""

This relands dda60035e9f0769c8907cdf6561489e0435c2275,
which was reverted by dbaa6a1858a42f72b683f700d3bd7a9632f7a518


Compare: https://github.com/llvm/llvm-project/compare/d806618636f8...16bf02c3a19d