[llvm-dev] Reducing printing deducible information in MIR based codegen testing

[Matthias Braun via llvm-dev]

> On Apr 16, 2017, at 12:05 PM, vivek pandya <vivekvpandya at gmail.com> wrote:
> 
> Hi Matthias,
> 
> Sorry I took some time.
> I have checked code for MIRPrinter.cpp and I think we can control what will be converted to YAML from there. So Do you mean to control information from there? Or some thing smarter like using mapping traits information (i.e optional values can be turned off) and/or flag to indicate how much information should be printed?
Whatever works (and results in nicer code). Just send patches, this also can be split into multiple patches or starting with a proof of concept for a single value that we can discuss on phabricator.

It seems like the yam traits allow to specify default values. Though I assume that only works for statically known values so you may need extra code in some cases where the “default” changes dynamically (I would expect the default function alignment to change based on target and other things for example).
I’m not convinced “levels” make sense here (that would mean we are actually loosing information and I can’t come up with good use cases for that).

- Matthias