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

[Krzysztof Parzyszek via llvm-dev]

I ran into the LR/PC issue on ARM again, and the patch has some approach 
to fixing it.  I'm wondering what you think.
https://reviews.llvm.org/D36160

-Krzysztof

On 7/28/2017 5:13 PM, Quentin Colombet wrote:
> 
>> On Jul 28, 2017, at 2:17 PM, Krzysztof Parzyszek <kparzysz at codeaurora.org> wrote:
>>
>> 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.
> 
> Great!
> 
>>
>> -Krzysztof
>>
>> -- 
>> Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
> 

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