[llvm-commits] Bad COPY removal in register coalescer

[Jakob Stoklund Olesen]

On Oct 29, 2012, at 9:34 AM, James Molloy <james.molloy at arm.com> wrote:

> I've found a bug in the Register Coalescer, but am not really sure how
> to fix it. Hopefully you can help!
> 
> The short version is that the coalescer decides to coalesce (via
> adjustCopiesBackFrom()) a COPY that it shouldn't.

I dont' see adjustCopiesBackFrom() doing anything at all in your test case.

What's your llc command line?

/jakob