Is there a way to keep the LLVM IR metadata till Machine IR?

[rajat]

I want to generate a pragma before the machine load instructions that contains information based on the Metadata (attached to load instruction in LLVM IR).

From what I have read, neither SelectionDAG nor MachineInstr has a way to store Metadata. Are there any alternatives to achieve the same?

Thanks in advance!!

[tschuett]

Here is a similar discussion:

How to pass the information from LLVM IR to the backend Machine IR?

Hi folks. I want to instrument store instructions selectively to sanitize their target operands. I need to First, identify instructions that access specific memory address at the LLVM IR and tag those store instructions Second, pass tags to the LLVM ARM backend and instrument store instructions at the Machine IR. In the second step, it’s currently infeasible to tag instructions by neither Instruction metadata nor Instruction debuginfo. Because Instruction metadata will be removed when low…

[rajat]

Thanks @tschuett, but changing all load instructions to a function call would be infeasible for me.