[llvm-commits] [pr1225] Fix using instcombine instead of instsimplify

[Rafael Espíndola]

> My primary concern here is that this could introduce miscompiles
> because some callers of ComputeMaskedBits or SimplifyDemanded might
> get confused by seeing bits it didn't request/expect, like the issue I
> fixed in r152066.  The concept of the patch seems fine, though.

Yes, I had to fix that pr in different way in this patch. That is why
I gave it the extra level of testing.

I will try building firefox with it too. Any other suggestions?

> -Eli

Cheers,
Rafael