[LLVMdev] Machine Level IR text-based serialization

[Hal Finkel]

----- Original Message -----
> From: "Alex L" <arphaman at gmail.com>
> To: "LLVM Developers Mailing List" <llvmdev at cs.uiuc.edu>
> Sent: Tuesday, April 21, 2015 12:12:40 PM
> Subject: [LLVMdev] Machine Level IR text-based serialization
> 
> 
> 
> Hi, I'm Alex, and last summer I was working on the code coverage
> support for pgo for LLVM and clang at Apple. I'm currently interning
> at Apple again, and I'm planning to work on a project that was
> suggested to me by Bob Wilson.
> I plan on developing a text-based, human readable format that allows
> LLVM to serialize the machine level IR (The data structures like
> MachineFunction, etc. from CodeGen). The motivation for this project
> is that it will enable easier testing of the CodeGen passes, and
> will allow developers to run tests that invoke just a single CodeGen
> pass, or that start from a specific pass (llc's -start-after
> option).

Great! This is very badly needed.

> I would be interested in hearing from other people who might be
> working on a similar project or have ideas in which direction this
> project should go. I will be posting an initial proposal for the
> format in a couple of days. Thanks, Alex

My one requirement is that it support references to the IR (we still need IR-level aliasing analysis during CodeGen, and so the MachineMemOperand data structures need to be available and point to the right things).

Thanks again,
Hal

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-- 
Hal Finkel
Assistant Computational Scientist
Leadership Computing Facility
Argonne National Laboratory