[llvm] r330742 - Let TableGen write output only if it changed, instead of doing so in cmake.

[Tim Northover via llvm-commits]

Hi Nico,

On 24 April 2018 at 18:29, Nico Weber via llvm-commits
<llvm-commits at lists.llvm.org> wrote:
> Let TableGen write output only if it changed, instead of doing so in cmake.

This change seems to force all TableGen steps to rerun even for an
incremental build with no changes. That's probably worse than the
status before. Do you think it's fixable?

Cheers.

Tim.