[UPSTREAM] Pull down upstream changes to fix gfx950 functional failure

[justinrosner]

Motivation

This PR pulls in the following upstream changes that fix a functional failure on gfx950.

• Link to upstream PRs:
  • AMDGPU: Track minNumAGPRs in MFI instead of mayUseAGPRs llvm/llvm-project#161996
  • [AMDGPU] Use implicit operand to preserve liveness of COPY llvm/llvm-project#164911
  • [AMDGPU] Make sort ordering in AMDGPURewriteAGPRCopyMFMAImpl::eliminateSpillsOfReassignedVGPRs() strict weak. llvm/llvm-project#162493
• Fixes issue: https://github.com/ROCm/rocMLIR-internal/issues/2112

Technical Details

See the linked PRs above for a detailed description of the upstream changes.

While I was investigating this case I also realized that I forgot to turn on, i.e., check the FileCheck output, the conv_bwd_data LIT tests when enabling the CPU lowering path: #2007. This PR addresses that, and fixes up an error in the CPU lowering logic that was masked because of this.

Test Plan

• Manually run failing parameterSweeps
• Run Weekly CI (for parameterSweeps)

Test Result

• Manually run failing parameterSweeps
• Run Weekly CI (for parameterSweeps)
  • Passing parameterSweeps for gfx950: https://ml-ci-internal.amd.com/job/MLIR/job/mlir/job/PR-2082/13/pipeline-overview/?selected-node=479

Submission Checklist

• Look over the contributing guidelines at https://github.com/ROCm/ROCm/blob/develop/CONTRIBUTING.md#pull-requests.

[dhernandez0]

I don't like that we are fixing an upstream bug and a downstream bug at the same time. While the name of the PR is [UPSTREAM]. I'd split it into two PRs but I'm going to approve it and you can decide.

[justinrosner]

I was going to merge this PR such that all of the external commits are preserved as well as the internal commit. So in the rocMLIR git history the internal commit will show up as separate. They are only really joined in the reviewing of this PR.

I'm happy to pull out the internal fix into its own PR if you feel like that is something worth doing.

[dhernandez0]

let's merge it