[llvm-dev] [CodeGen] Read/Write Machine IR from/to Persistent File

[Lele Ma via llvm-dev]

Dear Matthew,

On Thu, Nov 21, 2019 at 1:02 AM Arsenault, Matthew <
Matthew.Arsenault at amd.com> wrote:

> Yes, http://llvm.org/docs/MIRLangRef.html#id12
>
>
>
> Usually you use -stop-before=passname or -stop-after=passname to get some
> MIR at a relevant point. Note that currently not all information tracked is
> really serialized, especially target specific MachineFunctionInfo. Some
> targets partially implement this, but there are still a lot of gaps.
>

Thanks for your prompt response. That is helpful.


>
>
> Also note nothing about MIR is remotely stable, so this may differ from
> what you mean by “persistent”
>
>
>
Could you explain a little bit more about what do you mean by "remotely
stable" ? Can the serialized YAML MIR be compiled into a final executable?

Lele


> -Matt
>
>
>
> *From: *llvm-dev <llvm-dev-bounces at lists.llvm.org> on behalf of llvm-dev <
> llvm-dev at lists.llvm.org>
> *Reply-To: *Lele Ma <lelema.cn at gmail.com>
> *Date: *Thursday, November 21, 2019 at 08:09
> *To: *llvm-dev <llvm-dev at lists.llvm.org>
> *Subject: *[llvm-dev] [CodeGen] Read/Write Machine IR from/to Persistent
> File
>
>
>
> Dear LLVM developers,
>
>
>
> Just as LLVM IR can be read/write via persistent bitcode (*.bc *.ll)
> files, is there any similar implementation in LLVM to read/write Machine IR
> (MIR) via a persistent file?
>
>
>
> If not and I would like to add it (e.g. for ARM or RISC-V), could you
> direct me materials and/or LLVM source code modules where I should start
> with?
>
>
>
> Best Regards,
>
> Lele Ma
>
>
>
>
>
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