[all-commits] [llvm/llvm-project] cabfcf: [ARM] Fix conditions for lowering to S[LR]I

[Petre-Ionut Tudor via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: cabfcf840a9d15d92466c6774953d3aa399cde92
      https://github.com/llvm/llvm-project/commit/cabfcf840a9d15d92466c6774953d3aa399cde92
  Author: Petre-Ionut Tudor <petre-ionut.tudor at arm.com>
  Date:   2020-04-17 (Fri, 17 Apr 2020)

  Changed paths:
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.h
    M llvm/lib/Target/AArch64/AArch64InstrInfo.td
    M llvm/test/CodeGen/AArch64/arm64-sli-sri-opt.ll

  Log Message:
  -----------
  [ARM] Fix conditions for lowering to S[LR]I

Summary:
Fixed wrong conditions for generating (S[LR]I X, Y, C2) from
(or (and X, BvecC1), (lsl Y, C2)) and added ISel nodes to lower to S[LR]I. The
optimisation is also enabled by default now.

Subscribers: kristof.beyls, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D77387