[PATCH] D148854: [llvm-stress] Switch to a FuzzMutate driver

[Bjorn Pettersson via Phabricator via llvm-commits]

bjope added a comment.

Just for info:
Downstream we have some hacks (extra options) to avoid certain vector types, and also to avoid some variants of InsertElement and ExtractElement with non-constant indices.
One idea would be to add support in our backend for those things to get rid of the restrictions, or I guess we need to hack into FuzzMutate somehow.

IIUC the allowed vector types are specified in `addVectorTypeGetters` so at least that might not be that complicated to adjust that downstream.
I also think `llvm::fuzzerop::insertElementDescriptor` , `llvm::fuzzerop::extractElementDescriptor` is the place to edit if I want to add an option forcing the index to be a constant, right?

Not saying that our downstream adjustments really should block something like this from being committed upstream. I'm just trying to figure out how we eventually would deal with it downstream.


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https://reviews.llvm.org/D148854