This work is a continuation of
[PR#140530](https://github.com/llvm/llvm-project/pull/140530),
co-authored by @optimisan.
The PR refactors `MachineModuleSlotTracker` to support both the Legacy
Pass Manager and New Pass Manager by removing its direct dependency on
`MachineModuleInfo`.
`MachineModuleSlotTracker` requires `MachineModuleInfo` to obtain
`MachineFunction` instances when printing MIR. But
`MachineFunctionAnalysis` provides `MachineFunction` for NPM.
This patch refactors `MachineModuleSlotTracker` to use a function
callback (`MFGetterFnT`) instead of directly depending on
`MachineModuleInfo`.
---------
Co-authored-by: vikhegde <vikram.hegde@amd.com>
- Distinct metadata needs generating in the codegen to attach correct
AAInfo on the loads/stores after lowering, merging, and other relevant
transformations.
- This patch adds 'MachhineModuleSlotTracker' to help assign slot
numbers to these newly generated unnamed metadata nodes.
- To help 'MachhineModuleSlotTracker' track machine metadata, the
original 'SlotTracker' is rebased from 'AbstractSlotTrackerStorage',
which provides basic interfaces to create/retrive metadata slots. In
addition, once LLVM IR is processsed, additional hooks are also
introduced to help collect machine metadata and assign them slot
numbers.
- Finally, if there is any such machine metadata, 'MIRPrinter' outputs
an additional 'machineMetadataNodes' field containing all the
definition of those nodes.
Reviewed By: arsenm
Differential Revision: https://reviews.llvm.org/D103205
