[all-commits] [llvm/llvm-project] 4b8ade: [AArch64] Cortex-A55 scheduler model

[sjoerdmeijer via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: 4b8ade837e36b7f0181ce86fc23f33851d0fdd35
      https://github.com/llvm/llvm-project/commit/4b8ade837e36b7f0181ce86fc23f33851d0fdd35
  Author: Sjoerd Meijer <sjoerd.meijer at arm.com>
  Date:   2020-09-21 (Mon, 21 Sep 2020)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64.td
    A llvm/lib/Target/AArch64/AArch64SchedA55.td

  Log Message:
  -----------
  [AArch64] Cortex-A55 scheduler model

This is an initial commit adding the A55 model, but it isn't used/enabled yet.
We will follow up on this to improve the model, then flip the switch.

The optimisation guide describing Cortex-A55 micro-architecture in more detail
can be found here:

https://static.docs.arm.com/epm128372/20/arm_cortex_a55_software_optimization_guide_v2.pdf

Original patch by Javed Absar.

Differential Revision: https://reviews.llvm.org/D46884