[all-commits] [llvm/llvm-project] 0827e2: [AArch64] Fix incorrect `isLegalAddressingMode`

[Momchil Velikov via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 0827e2fa3fd15b49fd2d0fc676753f11abb60cab
      https://github.com/llvm/llvm-project/commit/0827e2fa3fd15b49fd2d0fc676753f11abb60cab
  Author: Momchil Velikov <momchil.velikov at arm.com>
  Date:   2023-04-20 (Thu, 20 Apr 2023)

  Changed paths:
    M llvm/lib/CodeGen/CodeGenPrepare.cpp
    M llvm/lib/Target/AArch64/AArch64ISelLowering.cpp
    M llvm/lib/Transforms/Scalar/LoopStrengthReduce.cpp
    M llvm/test/Transforms/LoopStrengthReduce/AArch64/lsr-pre-inc-offset-check.ll
    A llvm/unittests/Target/AArch64/AddressingModes.cpp
    M llvm/unittests/Target/AArch64/CMakeLists.txt

  Log Message:
  -----------
  [AArch64] Fix incorrect `isLegalAddressingMode`

`AArch64TargetLowering::isLegalAddressingMode` has a number of
defects, including accepting an addressing mode which consists of only
an immediate operand, or not checking the offset range for an
addressing mode in the form `1*ScaledReg + Offs`.

This patch fixes the above issues.

Reviewed By: dmgreen

Differential Revision: https://reviews.llvm.org/D143895

Change-Id: I756fa21941844ded44f082ac7eea4391219f9851