[llvm-dev] Tail merging "undef" with a defined register: wrong code

[Krzysztof Parzyszek via llvm-dev]

On 7/28/2017 4:00 PM, Quentin Colombet wrote:
> I am having a hard time seeing the problem from the example, shouldn’t 
> we just put an implicit_def at the end of bb.0?

That should work actually, even in the general case. I overlooked 
something when I first said it wouldn't.

-Krzysztof

-- 
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, 
hosted by The Linux Foundation